ref: d6dd2ace1ceecb606beaae3dbbeffa5fc9a09854
dir: /src/it/itrender.c/
/* _______ ____ __ ___ ___
* \ _ \ \ / \ / \ \ / / ' ' '
* | | \ \ | | || | \/ | . .
* | | | | | | || ||\ /| |
* | | | | | | || || \/ | | ' ' '
* | | | | | | || || | | . .
* | |_/ / \ \__// || | |
* /_______/ynamic \____/niversal /__\ /____\usic /| . . ibliotheque
* / \
* / . \
* itrender.c - Code to render an Impulse Tracker / / \ \
* module. | < / \_
* | \/ /\ /
* Written - painstakingly - by entheh. \_ / > /
* | \ / /
* | ' /
* \__/
*/
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include "dumb.h"
#include "internal/dumb.h"
#include "internal/it.h"
#include "internal/lpc.h"
#include "internal/resampler.h"
// Keep this disabled, as it's actually slower than the original C/integer
// version
//
//#ifdef __APPLE__
//#include <TargetConditionals.h>
//#if TARGET_CPU_ARM || TARGET_CPU_ARM64
//#include <arm_neon.h>
//#define FILTER_NEON
//#endif
//#endif
// #define BIT_ARRAY_BULLSHIT
static IT_PLAYING *new_playing() {
IT_PLAYING *r = (IT_PLAYING *)malloc(sizeof(*r));
if (r) {
r->resampler.fir_resampler_ratio = 0.0;
r->resampler.fir_resampler[0] = resampler_create();
if (!r->resampler.fir_resampler[0]) {
free(r);
return NULL;
}
r->resampler.fir_resampler[1] = resampler_create();
if (!r->resampler.fir_resampler[1]) {
resampler_delete(r->resampler.fir_resampler[0]);
free(r);
return NULL;
}
}
return r;
}
static void free_playing(IT_PLAYING *r) {
resampler_delete(r->resampler.fir_resampler[1]);
resampler_delete(r->resampler.fir_resampler[0]);
free(r);
}
static IT_PLAYING *dup_playing(IT_PLAYING *src, IT_CHANNEL *dstchannel,
IT_CHANNEL *srcchannel) {
IT_PLAYING *dst;
if (!src)
return NULL;
dst = malloc(sizeof(*dst));
if (!dst)
return NULL;
dst->flags = src->flags;
dst->resampling_quality = src->resampling_quality;
ASSERT(src->channel);
dst->channel = &dstchannel[src->channel - srcchannel];
dst->sample = src->sample;
dst->instrument = src->instrument;
dst->env_instrument = src->env_instrument;
dst->sampnum = src->sampnum;
dst->instnum = src->instnum;
dst->declick_stage = src->declick_stage;
dst->float_volume[0] = src->float_volume[0];
dst->float_volume[1] = src->float_volume[1];
dst->ramp_volume[0] = src->ramp_volume[0];
dst->ramp_volume[1] = src->ramp_volume[1];
dst->ramp_delta[0] = src->ramp_delta[0];
dst->ramp_delta[1] = src->ramp_delta[1];
dst->channel_volume = src->channel_volume;
dst->volume = src->volume;
dst->pan = src->pan;
dst->volume_offset = src->volume_offset;
dst->panning_offset = src->panning_offset;
dst->note = src->note;
dst->enabled_envelopes = src->enabled_envelopes;
dst->filter_cutoff = src->filter_cutoff;
dst->filter_resonance = src->filter_resonance;
dst->true_filter_cutoff = src->true_filter_cutoff;
dst->true_filter_resonance = src->true_filter_resonance;
dst->vibrato_speed = src->vibrato_speed;
dst->vibrato_depth = src->vibrato_depth;
dst->vibrato_n = src->vibrato_n;
dst->vibrato_time = src->vibrato_time;
dst->vibrato_waveform = src->vibrato_waveform;
dst->tremolo_speed = src->tremolo_speed;
dst->tremolo_depth = src->tremolo_depth;
dst->tremolo_time = src->tremolo_time;
dst->tremolo_waveform = src->tremolo_waveform;
dst->panbrello_speed = src->panbrello_speed;
dst->panbrello_depth = src->panbrello_depth;
dst->panbrello_time = src->panbrello_time;
dst->panbrello_waveform = src->panbrello_waveform;
dst->panbrello_random = src->panbrello_random;
dst->sample_vibrato_time = src->sample_vibrato_time;
dst->sample_vibrato_waveform = src->sample_vibrato_waveform;
dst->sample_vibrato_depth = src->sample_vibrato_depth;
dst->slide = src->slide;
dst->delta = src->delta;
dst->finetune = src->finetune;
dst->volume_envelope = src->volume_envelope;
dst->pan_envelope = src->pan_envelope;
dst->pitch_envelope = src->pitch_envelope;
dst->fadeoutcount = src->fadeoutcount;
dst->filter_state[0] = src->filter_state[0];
dst->filter_state[1] = src->filter_state[1];
dst->resampler = src->resampler;
dst->resampler.pickup_data = dst;
dst->resampler.fir_resampler_ratio = src->resampler.fir_resampler_ratio;
dst->resampler.fir_resampler[0] =
resampler_dup(src->resampler.fir_resampler[0]);
if (!dst->resampler.fir_resampler[0]) {
free(dst);
return NULL;
}
dst->resampler.fir_resampler[1] =
resampler_dup(src->resampler.fir_resampler[1]);
if (!dst->resampler.fir_resampler[1]) {
resampler_delete(dst->resampler.fir_resampler[0]);
free(dst);
return NULL;
}
dst->time_lost = src->time_lost;
// dst->output = src->output;
return dst;
}
static void dup_channel(IT_CHANNEL *dst, IT_CHANNEL *src) {
dst->flags = src->flags;
dst->volume = src->volume;
dst->volslide = src->volslide;
dst->xm_volslide = src->xm_volslide;
dst->panslide = src->panslide;
dst->pan = src->pan;
dst->truepan = src->truepan;
dst->channelvolume = src->channelvolume;
dst->channelvolslide = src->channelvolslide;
dst->instrument = src->instrument;
dst->note = src->note;
dst->SFmacro = src->SFmacro;
dst->filter_cutoff = src->filter_cutoff;
dst->filter_resonance = src->filter_resonance;
dst->key_off_count = src->key_off_count;
dst->note_cut_count = src->note_cut_count;
dst->note_delay_count = src->note_delay_count;
dst->note_delay_entry = src->note_delay_entry;
dst->new_note_action = src->new_note_action;
dst->arpeggio_table = src->arpeggio_table;
memcpy(dst->arpeggio_offsets, src->arpeggio_offsets,
sizeof(dst->arpeggio_offsets));
dst->retrig = src->retrig;
dst->xm_retrig = src->xm_retrig;
dst->retrig_tick = src->retrig_tick;
dst->tremor_time = src->tremor_time;
dst->vibrato_waveform = src->vibrato_waveform;
dst->tremolo_waveform = src->tremolo_waveform;
dst->panbrello_waveform = src->panbrello_waveform;
dst->portamento = src->portamento;
dst->toneporta = src->toneporta;
dst->toneslide = src->toneslide;
dst->toneslide_tick = src->toneslide_tick;
dst->last_toneslide_tick = src->last_toneslide_tick;
dst->ptm_toneslide = src->ptm_toneslide;
dst->ptm_last_toneslide = src->ptm_last_toneslide;
dst->okt_toneslide = src->okt_toneslide;
dst->destnote = src->destnote;
dst->glissando = src->glissando;
dst->sample = src->sample;
dst->truenote = src->truenote;
dst->midi_state = src->midi_state;
dst->lastvolslide = src->lastvolslide;
dst->lastDKL = src->lastDKL;
dst->lastEF = src->lastEF;
dst->lastG = src->lastG;
dst->lastHspeed = src->lastHspeed;
dst->lastHdepth = src->lastHdepth;
dst->lastRspeed = src->lastRspeed;
dst->lastRdepth = src->lastRdepth;
dst->lastYspeed = src->lastYspeed;
dst->lastYdepth = src->lastYdepth;
dst->lastI = src->lastI;
dst->lastJ = src->lastJ;
dst->lastN = src->lastN;
dst->lastO = src->lastO;
dst->high_offset = src->high_offset;
dst->lastP = src->lastP;
dst->lastQ = src->lastQ;
dst->lastS = src->lastS;
dst->pat_loop_row = src->pat_loop_row;
dst->pat_loop_count = src->pat_loop_count;
dst->pat_loop_end_row = src->pat_loop_end_row;
dst->lastW = src->lastW;
dst->xm_lastE1 = src->xm_lastE1;
dst->xm_lastE2 = src->xm_lastE2;
dst->xm_lastEA = src->xm_lastEA;
dst->xm_lastEB = src->xm_lastEB;
dst->xm_lastX1 = src->xm_lastX1;
dst->xm_lastX2 = src->xm_lastX2;
dst->inv_loop_delay = src->inv_loop_delay;
dst->inv_loop_speed = src->inv_loop_speed;
dst->inv_loop_offset = src->inv_loop_offset;
dst->playing = dup_playing(src->playing, dst, src);
#ifdef BIT_ARRAY_BULLSHIT
dst->played_patjump = bit_array_dup(src->played_patjump);
dst->played_patjump_order = src->played_patjump_order;
#endif
// dst->output = src->output;
}
/* Allocate the new callbacks first, then pass them to this function!
* It will free them on failure.
*/
static DUMB_IT_SIGRENDERER *dup_sigrenderer(DUMB_IT_SIGRENDERER *src,
int n_channels,
IT_CALLBACKS *callbacks) {
DUMB_IT_SIGRENDERER *dst;
int i;
if (!src) {
if (callbacks)
free(callbacks);
return NULL;
}
dst = malloc(sizeof(*dst));
if (!dst) {
if (callbacks)
free(callbacks);
return NULL;
}
dst->sigdata = src->sigdata;
dst->n_channels = n_channels;
dst->resampling_quality = src->resampling_quality;
dst->globalvolume = src->globalvolume;
dst->globalvolslide = src->globalvolslide;
dst->tempo = src->tempo;
dst->temposlide = src->temposlide;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++)
dup_channel(&dst->channel[i], &src->channel[i]);
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++)
dst->playing[i] =
dup_playing(src->playing[i], dst->channel, src->channel);
dst->tick = src->tick;
dst->speed = src->speed;
dst->rowcount = src->rowcount;
dst->order = src->order;
dst->row = src->row;
dst->processorder = src->processorder;
dst->processrow = src->processrow;
dst->breakrow = src->breakrow;
dst->restart_position = src->restart_position;
dst->n_rows = src->n_rows;
dst->entry_start = src->entry_start;
dst->entry = src->entry;
dst->entry_end = src->entry_end;
dst->time_left = src->time_left;
dst->sub_time_left = src->sub_time_left;
dst->ramp_style = src->ramp_style;
dst->click_remover = NULL;
dst->callbacks = callbacks;
#ifdef BIT_ARRAY_BULLSHIT
dst->played = bit_array_dup(src->played);
dst->looped = src->looped;
dst->time_played = src->time_played;
dst->row_timekeeper = timekeeping_array_dup(src->row_timekeeper);
#endif
dst->gvz_time = src->gvz_time;
dst->gvz_sub_time = src->gvz_sub_time;
// dst->max_output = src->max_output;
return dst;
}
static const IT_MIDI default_midi = {
/* unsigned char SFmacro[16][16]; */
{{0xF0, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00}},
/* unsigned char SFmacrolen[16]; */
{4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
/* unsigned short SFmacroz[16]; */
/* Bitfield; bit 0 set = z in first position */
{0x0008, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000},
/* unsigned char Zmacro[128][16]; */
{{0xF0, 0xF0, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x28, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x48, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x58, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x68, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0xF0, 0xF0, 0x01, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00},
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00}},
/* unsigned char Zmacrolen[128]; */
{4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}};
static void it_reset_filter_state(IT_FILTER_STATE *state) {
state->currsample = 0;
state->prevsample = 0;
}
#define LOG10 2.30258509299
/* IMPORTANT: This function expects one extra sample in 'src' so it can apply
* click removal. It reads size samples, starting from src[0], and writes its
* output starting at dst[pos]. The pos parameter is required for getting
* click removal right.
*/
static void it_filter_int(DUMB_CLICK_REMOVER *cr, IT_FILTER_STATE *state,
sample_t *dst, long pos, sample_t *src, long size,
int step, int sampfreq, int cutoff, int resonance) {
sample_t currsample = state->currsample;
sample_t prevsample = state->prevsample;
float a, b, c;
long datasize;
{
float inv_angle =
(float)(sampfreq *
pow(0.5,
0.25 + cutoff * (1.0 / (24 << IT_ENVELOPE_SHIFT))) *
(1.0 / (2 * 3.14159265358979323846 * 110.0)));
float loss = (float)exp(resonance * (-LOG10 * 1.2 / 128.0));
float d, e;
#if 0
loss *= 2; // This is the mistake most players seem to make!
#endif
#if 1
d = (1.0f - loss) / inv_angle;
if (d > 2.0f)
d = 2.0f;
d = (loss - d) * inv_angle;
e = inv_angle * inv_angle;
a = 1.0f / (1.0f + d + e);
c = -e * a;
b = 1.0f - a - c;
#else
a = 1.0f / (inv_angle * inv_angle + inv_angle * loss + loss);
c = -(inv_angle * inv_angle) * a;
b = 1.0f - a - c;
#endif
}
dst += pos * step;
datasize = size * step;
#define INT_FILTERS
#ifdef INT_FILTERS
#define MULSCA(a, b) ((int)((LONG_LONG)((a) << 4) * (b) >> 32))
#define SCALEB 12
{
int ai = (int)(a * (1 << (16 + SCALEB)));
int bi = (int)(b * (1 << (16 + SCALEB)));
int ci = (int)(c * (1 << (16 + SCALEB)));
int i;
if (cr) {
sample_t startstep = MULSCA(src[0], ai) + MULSCA(currsample, bi) +
MULSCA(prevsample, ci);
dumb_record_click(cr, pos, startstep);
}
for (i = 0; i < datasize; i += step) {
{
sample_t newsample = MULSCA(src[i], ai) +
MULSCA(currsample, bi) +
MULSCA(prevsample, ci);
prevsample = currsample;
currsample = newsample;
}
dst[i] += currsample;
}
if (cr) {
sample_t endstep = MULSCA(src[datasize], ai) +
MULSCA(currsample, bi) + MULSCA(prevsample, ci);
dumb_record_click(cr, pos + size, -endstep);
}
}
#else
#error This version is broken - it does not use step, and state should contain floats for it
if (cr) {
float startstep = src[0] * a + currsample * b + prevsample * c;
dumb_record_click(cr, pos, (sample_t)startstep);
}
{
int i = size % 3;
while (i > 0) {
{
float newsample = *src++ * a + currsample * b + prevsample * c;
prevsample = currsample;
currsample = newsample;
}
*dst++ += (sample_t)currsample;
i--;
}
i = size / 3;
while (i > 0) {
float newsample;
/* Gotta love unrolled loops! */
*dst++ += (sample_t)(newsample = *src++ * a + currsample * b +
prevsample * c);
*dst++ += (sample_t)(prevsample = *src++ * a + newsample * b +
currsample * c);
*dst++ += (sample_t)(currsample = *src++ * a + prevsample * b +
newsample * c);
i--;
}
}
if (cr) {
float endstep = src[datasize] * a + currsample * b + prevsample * c;
dumb_record_click(cr, pos + size, -(sample_t)endstep);
}
#endif
state->currsample = currsample;
state->prevsample = prevsample;
}
#if defined(_USE_SSE) && (defined(_M_IX86) || defined(__i386__) || \
defined(_M_X64) || defined(__amd64__))
#include <xmmintrin.h>
static void it_filter_sse(DUMB_CLICK_REMOVER *cr, IT_FILTER_STATE *state,
sample_t *dst, long pos, sample_t *src, long size,
int step, int sampfreq, int cutoff, int resonance) {
__m128 data, impulse;
__m128 temp1, temp2;
sample_t currsample = state->currsample;
sample_t prevsample = state->prevsample;
float imp[4];
// profiler( filter_sse ); On ClawHammer Athlon64 3200+, ~12000 cycles, ~500
// for that x87 setup code (as opposed to ~25500 for the original integer
// code)
long datasize;
{
float inv_angle =
(float)(sampfreq *
pow(0.5,
0.25 + cutoff * (1.0 / (24 << IT_ENVELOPE_SHIFT))) *
(1.0 / (2 * 3.14159265358979323846 * 110.0)));
float loss = (float)exp(resonance * (-LOG10 * 1.2 / 128.0));
float d, e;
#if 0
loss *= 2; // This is the mistake most players seem to make!
#endif
#if 1
d = (1.0f - loss) / inv_angle;
if (d > 2.0f)
d = 2.0f;
d = (loss - d) * inv_angle;
e = inv_angle * inv_angle;
imp[0] = 1.0f / (1.0f + d + e);
imp[2] = -e * imp[0];
imp[1] = 1.0f - imp[0] - imp[2];
#else
imp[0] = 1.0f / (inv_angle * inv_angle + inv_angle * loss + loss);
imp[2] = -(inv_angle * inv_angle) * imp[0];
imp[1] = 1.0f - imp[0] - imp[2];
#endif
imp[3] = 0.0f;
}
dst += pos * step;
datasize = size * step;
{
int ai, bi, ci, i;
if (cr) {
sample_t startstep;
ai = (int)(imp[0] * (1 << (16 + SCALEB)));
bi = (int)(imp[1] * (1 << (16 + SCALEB)));
ci = (int)(imp[2] * (1 << (16 + SCALEB)));
startstep = MULSCA(src[0], ai) + MULSCA(currsample, bi) +
MULSCA(prevsample, ci);
dumb_record_click(cr, pos, startstep);
}
temp1 = _mm_setzero_ps();
data = _mm_cvtsi32_ss(temp1, currsample);
temp2 = _mm_cvtsi32_ss(temp1, prevsample);
impulse = _mm_loadu_ps((const float *)&imp);
data = _mm_shuffle_ps(data, temp2, _MM_SHUFFLE(1, 0, 0, 1));
for (i = 0; i < datasize; i += step) {
temp1 = _mm_cvtsi32_ss(data, src[i]);
temp1 = _mm_mul_ps(temp1, impulse);
temp2 = _mm_movehl_ps(temp2, temp1);
temp1 = _mm_add_ps(temp1, temp2);
temp2 = temp1;
temp2 = _mm_shuffle_ps(temp2, temp1, _MM_SHUFFLE(0, 0, 0, 1));
temp1 = _mm_add_ps(temp1, temp2);
temp1 = _mm_shuffle_ps(temp1, data, _MM_SHUFFLE(2, 1, 0, 0));
data = temp1;
dst[i] += _mm_cvtss_si32(temp1);
}
currsample = _mm_cvtss_si32(temp1);
temp1 = _mm_shuffle_ps(temp1, data, _MM_SHUFFLE(0, 0, 0, 2));
prevsample = _mm_cvtss_si32(temp1);
if (cr) {
sample_t endstep = MULSCA(src[datasize], ai) +
MULSCA(currsample, bi) + MULSCA(prevsample, ci);
dumb_record_click(cr, pos + size, -endstep);
}
}
state->currsample = currsample;
state->prevsample = prevsample;
}
#endif
#ifdef FILTER_NEON
static void it_filter_neon(DUMB_CLICK_REMOVER *cr, IT_FILTER_STATE *state,
sample_t *dst, long pos, sample_t *src, long size,
int step, int sampfreq, int cutoff, int resonance) {
float32x4_t data, impulse;
float32x4_t temp1;
float32x2_t temp2;
float32_t temp3;
sample_t currsample = state->currsample;
sample_t prevsample = state->prevsample;
float imp[4];
// profiler( filter_sse ); On ClawHammer Athlon64 3200+, ~12000 cycles, ~500
// for that x87 setup code (as opposed to ~25500 for the original integer
// code)
long datasize;
{
float inv_angle =
(float)(sampfreq *
pow(0.5,
0.25 + cutoff * (1.0 / (24 << IT_ENVELOPE_SHIFT))) *
(1.0 / (2 * 3.14159265358979323846 * 110.0)));
float loss = (float)exp(resonance * (-LOG10 * 1.2 / 128.0));
float d, e;
#if 0
loss *= 2; // This is the mistake most players seem to make!
#endif
#if 1
d = (1.0f - loss) / inv_angle;
if (d > 2.0f)
d = 2.0f;
d = (loss - d) * inv_angle;
e = inv_angle * inv_angle;
imp[0] = 1.0f / (1.0f + d + e);
imp[2] = -e * imp[0];
imp[1] = 1.0f - imp[0] - imp[2];
#else
imp[0] = 1.0f / (inv_angle * inv_angle + inv_angle * loss + loss);
imp[2] = -(inv_angle * inv_angle) * imp[0];
imp[1] = 1.0f - imp[0] - imp[2];
#endif
imp[3] = 0.0f;
}
dst += pos * step;
datasize = size * step;
{
int ai, bi, ci, i;
if (cr) {
sample_t startstep;
ai = (int)(imp[0] * (1 << (16 + SCALEB)));
bi = (int)(imp[1] * (1 << (16 + SCALEB)));
ci = (int)(imp[2] * (1 << (16 + SCALEB)));
startstep = MULSCA(src[0], ai) + MULSCA(currsample, bi) +
MULSCA(prevsample, ci);
dumb_record_click(cr, pos, startstep);
}
data = vdupq_n_f32(0.0f);
data = vsetq_lane_f32(currsample, data, 1);
data = vsetq_lane_f32(prevsample, data, 2);
impulse = vld1q_f32((const float32_t *)&imp);
for (i = 0; i < datasize; i += step) {
data = vsetq_lane_f32(src[i], data, 0);
temp1 = vmulq_f32(data, impulse);
temp2 = vadd_f32(vget_high_f32(temp1), vget_low_f32(temp1));
temp3 = vget_lane_f32(vpadd_f32(temp2, temp2), 0);
data = vextq_f32(data, data, 3);
data = vsetq_lane_f32(temp3, data, 1);
dst[i] += temp3;
}
currsample = temp3;
prevsample = vgetq_lane_f32(data, 2);
if (cr) {
sample_t endstep = MULSCA(src[datasize], ai) +
MULSCA(currsample, bi) + MULSCA(prevsample, ci);
dumb_record_click(cr, pos + size, -endstep);
}
}
state->currsample = currsample;
state->prevsample = prevsample;
}
#endif
#undef LOG10
#ifdef _USE_SSE
#if defined(_M_IX86) || defined(__i386__)
#ifdef _MSC_VER
#include <intrin.h>
#elif defined(__clang__) || defined(__GNUC__)
static inline void __cpuid(int *data, int selector) {
#if defined(__PIC__) && defined(__i386__)
asm("xchgl %%ebx, %%esi; cpuid; xchgl %%ebx, %%esi"
: "=a"(data[0]), "=S"(data[1]), "=c"(data[2]), "=d"(data[3])
: "0"(selector));
#elif defined(__PIC__) && defined(__amd64__)
asm("xchg{q} {%%}rbx, %q1; cpuid; xchg{q} {%%}rbx, %q1"
: "=a"(data[0]), "=&r"(data[1]), "=c"(data[2]), "=d"(data[3])
: "0"(selector));
#else
asm("cpuid"
: "=a"(data[0]), "=b"(data[1]), "=c"(data[2]), "=d"(data[3])
: "a"(selector));
#endif
}
#else
#define __cpuid(a, b) memset((a), 0, sizeof(int) * 4)
#endif
static int query_cpu_feature_sse() {
int buffer[4];
__cpuid(buffer, 1);
if ((buffer[3] & (1 << 25)) == 0)
return 0;
return 1;
}
static int _dumb_it_use_sse = 0;
void _dumb_init_sse() {
static int initialized = 0;
if (!initialized) {
_dumb_it_use_sse = query_cpu_feature_sse();
initialized = 1;
}
}
#elif defined(_M_X64) || defined(__amd64__)
static const int _dumb_it_use_sse = 1;
void _dumb_init_sse() {}
#else
static const int _dumb_it_use_sse = 0;
void _dumb_init_sse() {}
#endif
#endif
static void it_filter(DUMB_CLICK_REMOVER *cr, IT_FILTER_STATE *state,
sample_t *dst, long pos, sample_t *src, long size,
int step, int sampfreq, int cutoff, int resonance) {
#if defined(_USE_SSE) && (defined(_M_IX86) || defined(__i386__) || \
defined(_M_X64) || defined(__amd64__))
_dumb_init_sse();
if (_dumb_it_use_sse)
it_filter_sse(cr, state, dst, pos, src, size, step, sampfreq, cutoff,
resonance);
else
#endif
#ifdef FILTER_NEON
it_filter_neon(cr, state, dst, pos, src, size, step, sampfreq, cutoff,
resonance);
#else
it_filter_int(cr, state, dst, pos, src, size, step, sampfreq, cutoff,
resonance);
#endif
}
static const signed char it_sine[256] = {
0, 2, 3, 5, 6, 8, 9, 11, 12, 14, 16, 17, 19, 20, 22,
23, 24, 26, 27, 29, 30, 32, 33, 34, 36, 37, 38, 39, 41, 42,
43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56,
57, 58, 59, 59, 60, 60, 61, 61, 62, 62, 62, 63, 63, 63, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 63, 63, 63, 62, 62,
62, 61, 61, 60, 60, 59, 59, 58, 57, 56, 56, 55, 54, 53, 52,
51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 39, 38, 37, 36,
34, 33, 32, 30, 29, 27, 26, 24, 23, 22, 20, 19, 17, 16, 14,
12, 11, 9, 8, 6, 5, 3, 2, 0, -2, -3, -5, -6, -8, -9,
-11, -12, -14, -16, -17, -19, -20, -22, -23, -24, -26, -27, -29, -30, -32,
-33, -34, -36, -37, -38, -39, -41, -42, -43, -44, -45, -46, -47, -48, -49,
-50, -51, -52, -53, -54, -55, -56, -56, -57, -58, -59, -59, -60, -60, -61,
-61, -62, -62, -62, -63, -63, -63, -64, -64, -64, -64, -64, -64, -64, -64,
-64, -64, -64, -63, -63, -63, -62, -62, -62, -61, -61, -60, -60, -59, -59,
-58, -57, -56, -56, -55, -54, -53, -52, -51, -50, -49, -48, -47, -46, -45,
-44, -43, -42, -41, -39, -38, -37, -36, -34, -33, -32, -30, -29, -27, -26,
-24, -23, -22, -20, -19, -17, -16, -14, -12, -11, -9, -8, -6, -5, -3,
-2};
#if 1
/** WARNING: use these! */
/** JULIEN: Plus for XM compatibility it could be interesting to rename
* it_sawtooth[] to it_rampdown[], and add an it_rampup[].
* Also, still for XM compat', twood be good if it was possible to tell the
* the player not to retrig' the waveform on a new instrument.
* Both of these are only for completness though, as I don't think it would
* be very noticeable ;)
*/
/** ENTHEH: IT also has the 'don't retrig' thingy :) */
static const signed char it_sawtooth[256] = {
64, 63, 63, 62, 62, 61, 61, 60, 60, 59, 59, 58, 58, 57, 57,
56, 56, 55, 55, 54, 54, 53, 53, 52, 52, 51, 51, 50, 50, 49,
49, 48, 48, 47, 47, 46, 46, 45, 45, 44, 44, 43, 43, 42, 42,
41, 41, 40, 40, 39, 39, 38, 38, 37, 37, 36, 36, 35, 35, 34,
34, 33, 33, 32, 32, 31, 31, 30, 30, 29, 29, 28, 28, 27, 27,
26, 26, 25, 25, 24, 24, 23, 23, 22, 22, 21, 21, 20, 20, 19,
19, 18, 18, 17, 17, 16, 16, 15, 15, 14, 14, 13, 13, 12, 12,
11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 4,
4, 3, 3, 2, 2, 1, 1, 0, 0, -1, -1, -2, -2, -3, -3,
-4, -4, -5, -5, -6, -6, -7, -7, -8, -8, -9, -9, -10, -10, -11,
-11, -12, -12, -13, -13, -14, -14, -15, -15, -16, -16, -17, -17, -18, -18,
-19, -19, -20, -20, -21, -21, -22, -22, -23, -23, -24, -24, -25, -25, -26,
-26, -27, -27, -28, -28, -29, -29, -30, -30, -31, -31, -32, -32, -33, -33,
-34, -34, -35, -35, -36, -36, -37, -37, -38, -38, -39, -39, -40, -40, -41,
-41, -42, -42, -43, -43, -44, -44, -45, -45, -46, -46, -47, -47, -48, -48,
-49, -49, -50, -50, -51, -51, -52, -52, -53, -53, -54, -54, -55, -55, -56,
-56, -57, -57, -58, -58, -59, -59, -60, -60, -61, -61, -62, -62, -63, -63,
-64};
static const signed char it_squarewave[256] = {
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0};
static const signed char it_xm_ramp[256] = {
0, -1, -1, -2, -2, -3, -3, -4, -4, -5, -5, -6, -6, -7, -7,
-8, -8, -9, -9, -10, -10, -11, -11, -12, -12, -13, -13, -14, -14, -15,
-15, -16, -16, -17, -17, -18, -18, -19, -19, -20, -20, -21, -21, -22, -22,
-23, -23, -24, -24, -25, -25, -26, -26, -27, -27, -28, -28, -29, -29, -30,
-30, -31, -31, -32, -32, -33, -33, -34, -34, -35, -35, -36, -36, -37, -37,
-38, -38, -39, -39, -40, -40, -41, -41, -42, -42, -43, -43, -44, -44, -45,
-45, -46, -46, -47, -47, -48, -48, -49, -49, -50, -50, -51, -51, -52, -52,
-53, -53, -54, -54, -55, -55, -56, -56, -57, -57, -58, -58, -59, -59, -60,
-60, -61, -61, -62, -62, -63, -63, -64, 64, 63, 63, 62, 62, 61, 61,
60, 60, 59, 59, 58, 58, 57, 57, 56, 56, 55, 55, 54, 54, 53,
53, 52, 52, 51, 51, 50, 50, 49, 49, 48, 48, 47, 47, 46, 46,
45, 45, 44, 44, 43, 43, 42, 42, 41, 41, 40, 40, 39, 39, 38,
38, 37, 37, 36, 36, 35, 35, 34, 34, 33, 33, 32, 32, 31, 31,
30, 30, 29, 29, 28, 28, 27, 27, 26, 26, 25, 25, 24, 24, 23,
23, 22, 22, 21, 21, 20, 20, 19, 19, 18, 18, 17, 17, 16, 16,
15, 15, 14, 14, 13, 13, 12, 12, 11, 11, 10, 10, 9, 9, 8,
8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1,
0};
static const signed char it_xm_squarewave[256] = {
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64, 64, 64, 64, 64, 64, 64, 64, -64, -64, -64, -64, -64, -64, -64,
-64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64,
-64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64,
-64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64,
-64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64,
-64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64,
-64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64,
-64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64,
-64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64, -64,
-64};
#endif
static void reset_tick_counts(DUMB_IT_SIGRENDERER *sigrenderer) {
int i;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
channel->key_off_count = 0;
channel->note_cut_count = 0;
channel->note_delay_count = 0;
}
}
static const unsigned char arpeggio_mod[32] = {0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1,
2, 0, 1, 2, 0, 1, 2, 0, 1, 2, 0,
1, 2, 0, 1, 2, 0, 1, 2, 0, 1};
static const unsigned char arpeggio_xm[32] = {0, 1, 2, 0, 1, 2, 0, 1, 2, 0, 1,
2, 0, 1, 2, 0, 0, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2};
static const unsigned char arpeggio_okt_3[32] = {
1, 0, 2, 1, 0, 2, 1, 0, 2, 1, 0, 2, 1, 0, 2, 1,
0, 2, 1, 0, 2, 1, 0, 2, 1, 0, 2, 1, 0, 2, 1, 0};
static const unsigned char arpeggio_okt_4[32] = {
0, 2, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1,
0, 2, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1};
static const unsigned char arpeggio_okt_5[32] = {
2, 2, 0, 2, 2, 0, 2, 2, 0, 2, 2, 0, 2, 2, 0, 2,
2, 0, 2, 2, 0, 2, 2, 0, 2, 2, 0, 2, 2, 0, 2, 2};
static void reset_channel_effects(IT_CHANNEL *channel) {
channel->volslide = 0;
channel->xm_volslide = 0;
channel->panslide = 0;
channel->channelvolslide = 0;
channel->arpeggio_table = (const unsigned char *)&arpeggio_mod;
memset(channel->arpeggio_offsets, 0, sizeof(channel->arpeggio_offsets));
channel->retrig = 0;
if (channel->xm_retrig) {
channel->xm_retrig = 0;
channel->retrig_tick = 0;
}
channel->tremor_time &= 127;
channel->portamento = 0;
channel->toneporta = 0;
if (channel->ptm_toneslide) {
channel->ptm_last_toneslide = channel->ptm_toneslide;
channel->last_toneslide_tick = channel->toneslide_tick;
} else
channel->ptm_last_toneslide = 0;
channel->ptm_toneslide = 0;
channel->toneslide_tick = 0;
channel->okt_toneslide = 0;
if (channel->playing) {
channel->playing->vibrato_n = 0;
channel->playing->tremolo_speed = 0;
channel->playing->tremolo_depth = 0;
channel->playing->panbrello_speed = 0;
}
}
static void reset_effects(DUMB_IT_SIGRENDERER *sigrenderer) {
int i;
sigrenderer->globalvolslide = 0;
sigrenderer->temposlide = 0;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
reset_channel_effects(&sigrenderer->channel[i]);
}
}
static void update_tremor(IT_CHANNEL *channel) {
if ((channel->tremor_time & 128) && channel->playing) {
if (channel->tremor_time == 128)
channel->tremor_time = (channel->lastI >> 4) | 192;
else if (channel->tremor_time == 192)
channel->tremor_time = (channel->lastI & 15) | 128;
else
channel->tremor_time--;
}
}
static void it_pickup_loop(DUMB_RESAMPLER *resampler, void *data) {
resampler->pos -= resampler->end - resampler->start;
((IT_PLAYING *)data)->time_lost += resampler->end - resampler->start;
}
static void it_pickup_pingpong_loop(DUMB_RESAMPLER *resampler, void *data) {
if (resampler->dir < 0) {
resampler->pos = (resampler->start << 1) - 1 - resampler->pos;
resampler->subpos ^= 65535;
resampler->dir = 1;
((IT_PLAYING *)data)->time_lost += (resampler->end - resampler->start)
<< 1;
} else {
resampler->pos = (resampler->end << 1) - 1 - resampler->pos;
resampler->subpos ^= 65535;
resampler->dir = -1;
}
}
static void it_pickup_stop_at_end(DUMB_RESAMPLER *resampler, void *data) {
(void)data;
if (resampler->dir < 0) {
resampler->pos = (resampler->start << 1) - 1 - resampler->pos;
resampler->subpos ^= 65535;
/* By rights, time_lost would be updated here. However, there is no
* need at this point; it will not be used.
*
* ((IT_PLAYING *)data)->time_lost += (resampler->src_end -
* resampler->src_start) << 1;
*/
resampler->dir = 1;
} else
resampler->dir = 0;
}
static void it_pickup_stop_after_reverse(DUMB_RESAMPLER *resampler,
void *data) {
(void)data;
resampler->dir = 0;
}
static void it_playing_update_resamplers(IT_PLAYING *playing) {
if ((playing->sample->flags & IT_SAMPLE_SUS_LOOP) &&
!(playing->flags & IT_PLAYING_SUSTAINOFF)) {
playing->resampler.start = playing->sample->sus_loop_start;
playing->resampler.end = playing->sample->sus_loop_end;
if (playing->resampler.start == playing->resampler.end)
playing->resampler.pickup = &it_pickup_stop_at_end;
else if (playing->sample->flags & IT_SAMPLE_PINGPONG_SUS_LOOP)
playing->resampler.pickup = &it_pickup_pingpong_loop;
else
playing->resampler.pickup = &it_pickup_loop;
} else if (playing->sample->flags & IT_SAMPLE_LOOP) {
playing->resampler.start = playing->sample->loop_start;
playing->resampler.end = playing->sample->loop_end;
if (playing->resampler.start == playing->resampler.end)
playing->resampler.pickup = &it_pickup_stop_at_end;
else if (playing->sample->flags & IT_SAMPLE_PINGPONG_LOOP)
playing->resampler.pickup = &it_pickup_pingpong_loop;
else
playing->resampler.pickup = &it_pickup_loop;
} else if (playing->flags & IT_PLAYING_REVERSE) {
playing->resampler.start = 0;
playing->resampler.end = playing->sample->length;
playing->resampler.dir = -1;
playing->resampler.pickup = &it_pickup_stop_after_reverse;
} else {
if (playing->sample->flags & IT_SAMPLE_SUS_LOOP)
playing->resampler.start = playing->sample->sus_loop_start;
else
playing->resampler.start = 0;
playing->resampler.end = playing->sample->length;
playing->resampler.pickup = &it_pickup_stop_at_end;
}
ASSERT(playing->resampler.pickup_data == playing);
}
/* This should be called whenever the sample or sample position changes. */
static void it_playing_reset_resamplers(IT_PLAYING *playing, long pos) {
int bits = playing->sample->flags & IT_SAMPLE_16BIT ? 16 : 8;
int quality = playing->resampling_quality;
int channels = playing->sample->flags & IT_SAMPLE_STEREO ? 2 : 1;
if (playing->sample->max_resampling_quality >= 0 &&
quality > playing->sample->max_resampling_quality)
quality = playing->sample->max_resampling_quality;
dumb_reset_resampler_n(bits, &playing->resampler, playing->sample->data,
channels, pos, 0, 0, quality);
playing->resampler.pickup_data = playing;
playing->time_lost = 0;
playing->flags &= ~IT_PLAYING_DEAD;
it_playing_update_resamplers(playing);
}
static void it_retrigger_note(DUMB_IT_SIGRENDERER *sigrenderer,
IT_CHANNEL *channel);
/* Should we only be retriggering short samples on XM? */
static void update_retrig(DUMB_IT_SIGRENDERER *sigrenderer,
IT_CHANNEL *channel) {
if (channel->xm_retrig) {
channel->retrig_tick--;
if (channel->retrig_tick <= 0) {
if (channel->playing) {
it_playing_reset_resamplers(channel->playing, 0);
channel->playing->declick_stage = 0;
} else if (sigrenderer->sigdata->flags & IT_WAS_AN_XM)
it_retrigger_note(sigrenderer, channel);
channel->retrig_tick = channel->xm_retrig;
}
} else if (channel->retrig & 0x0F) {
channel->retrig_tick--;
if (channel->retrig_tick <= 0) {
if (channel->retrig < 0x10) {
} else if (channel->retrig < 0x20) {
channel->volume--;
if (channel->volume > 64)
channel->volume = 0;
} else if (channel->retrig < 0x30) {
channel->volume -= 2;
if (channel->volume > 64)
channel->volume = 0;
} else if (channel->retrig < 0x40) {
channel->volume -= 4;
if (channel->volume > 64)
channel->volume = 0;
} else if (channel->retrig < 0x50) {
channel->volume -= 8;
if (channel->volume > 64)
channel->volume = 0;
} else if (channel->retrig < 0x60) {
channel->volume -= 16;
if (channel->volume > 64)
channel->volume = 0;
} else if (channel->retrig < 0x70) {
channel->volume <<= 1;
channel->volume /= 3;
} else if (channel->retrig < 0x80) {
channel->volume >>= 1;
} else if (channel->retrig < 0x90) {
} else if (channel->retrig < 0xA0) {
channel->volume++;
if (channel->volume > 64)
channel->volume = 64;
} else if (channel->retrig < 0xB0) {
channel->volume += 2;
if (channel->volume > 64)
channel->volume = 64;
} else if (channel->retrig < 0xC0) {
channel->volume += 4;
if (channel->volume > 64)
channel->volume = 64;
} else if (channel->retrig < 0xD0) {
channel->volume += 8;
if (channel->volume > 64)
channel->volume = 64;
} else if (channel->retrig < 0xE0) {
channel->volume += 16;
if (channel->volume > 64)
channel->volume = 64;
} else if (channel->retrig < 0xF0) {
channel->volume *= 3;
channel->volume >>= 1;
if (channel->volume > 64)
channel->volume = 64;
} else {
channel->volume <<= 1;
if (channel->volume > 64)
channel->volume = 64;
}
if (channel->playing) {
it_playing_reset_resamplers(channel->playing, 0);
channel->playing->declick_stage = 0;
} else if (sigrenderer->sigdata->flags & IT_WAS_AN_XM)
it_retrigger_note(sigrenderer, channel);
channel->retrig_tick = channel->retrig & 0x0F;
}
}
}
static void update_smooth_effects_playing(IT_PLAYING *playing) {
playing->vibrato_time += playing->vibrato_n * (playing->vibrato_speed << 2);
playing->tremolo_time += playing->tremolo_speed << 2;
playing->panbrello_time += playing->panbrello_speed;
if (playing->panbrello_waveform == 3)
playing->panbrello_random = (rand() % 129) - 64;
}
static void update_smooth_effects(DUMB_IT_SIGRENDERER *sigrenderer) {
int i;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
IT_PLAYING *playing = channel->playing;
if (playing) {
update_smooth_effects_playing(playing);
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
IT_PLAYING *playing = sigrenderer->playing[i];
if (playing) {
update_smooth_effects_playing(playing);
}
}
}
static const unsigned char pt_tab_invloop[16] = {
0x00, 0x05, 0x06, 0x07, 0x08, 0x0A, 0x0B, 0x0D,
0x0F, 0x13, 0x16, 0x1A, 0x20, 0x2B, 0x40, 0x80};
static void update_invert_loop(IT_CHANNEL *channel, IT_SAMPLE *sample) {
channel->inv_loop_delay += pt_tab_invloop[channel->inv_loop_speed];
if (channel->inv_loop_delay >= 0x80) {
channel->inv_loop_delay = 0;
if (sample &&
((sample->flags & (IT_SAMPLE_EXISTS | IT_SAMPLE_LOOP)) ==
(IT_SAMPLE_EXISTS | IT_SAMPLE_LOOP)) &&
!(sample->flags & (IT_SAMPLE_STEREO | IT_SAMPLE_16BIT))) {
if (sample->loop_end - sample->loop_start >= 4) {
channel->inv_loop_offset++;
if (channel->inv_loop_offset >=
(sample->loop_end - sample->loop_start))
channel->inv_loop_offset = 0;
((char *)sample
->data)[sample->loop_start + channel->inv_loop_offset] ^=
0xFF;
}
}
}
}
static void update_playing_effects(IT_PLAYING *playing) {
IT_CHANNEL *channel = playing->channel;
if (channel->channelvolslide) {
playing->channel_volume = channel->channelvolume;
}
if (channel->okt_toneslide) {
if (channel->okt_toneslide--) {
playing->note += channel->toneslide;
if (playing->note >= 120) {
if (channel->toneslide < 0)
playing->note = 0;
else
playing->note = 119;
}
}
} else if (channel->ptm_toneslide) {
if (--channel->toneslide_tick == 0) {
channel->toneslide_tick = channel->ptm_toneslide;
if (playing) {
playing->note += channel->toneslide;
if (playing->note >= 120) {
if (channel->toneslide < 0)
playing->note = 0;
else
playing->note = 119;
}
if (channel->playing == playing) {
channel->note = channel->truenote = playing->note;
}
if (channel->toneslide_retrig) {
it_playing_reset_resamplers(playing, 0);
playing->declick_stage = 0;
}
}
}
}
}
static void update_effects(DUMB_IT_SIGRENDERER *sigrenderer) {
int i;
if (sigrenderer->globalvolslide) {
sigrenderer->globalvolume += sigrenderer->globalvolslide;
if (sigrenderer->globalvolume > 128) {
if (sigrenderer->globalvolslide >= 0)
sigrenderer->globalvolume = 128;
else
sigrenderer->globalvolume = 0;
}
}
if (sigrenderer->temposlide) {
sigrenderer->tempo += sigrenderer->temposlide;
if (sigrenderer->tempo < 32) {
if (sigrenderer->temposlide >= 0)
sigrenderer->tempo = 255;
else
sigrenderer->tempo = 32;
}
}
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
IT_PLAYING *playing = channel->playing;
if (channel->xm_volslide) {
channel->volume += channel->xm_volslide;
if (channel->volume > 64) {
if (channel->xm_volslide >= 0)
channel->volume = 64;
else
channel->volume = 0;
}
}
if (channel->volslide) {
int clip = (sigrenderer->sigdata->flags & IT_WAS_AN_S3M) ? 63 : 64;
channel->volume += channel->volslide;
if (channel->volume > clip) {
if (channel->volslide >= 0)
channel->volume = clip;
else
channel->volume = 0;
}
}
if (channel->panslide) {
if (sigrenderer->sigdata->flags & IT_WAS_AN_XM) {
if (IT_IS_SURROUND(channel->pan)) {
channel->pan = 32;
channel->truepan = 32 + 128 * 64;
}
if (channel->panslide == -128)
channel->truepan = 32;
else
channel->truepan =
MID(32, channel->truepan + channel->panslide * 64,
32 + 255 * 64);
} else {
if (IT_IS_SURROUND(channel->pan)) {
channel->pan = 32;
}
channel->pan += channel->panslide;
if (channel->pan > 64) {
if (channel->panslide >= 0)
channel->pan = 64;
else
channel->pan = 0;
}
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
}
}
if (channel->channelvolslide) {
channel->channelvolume += channel->channelvolslide;
if (channel->channelvolume > 64) {
if (channel->channelvolslide >= 0)
channel->channelvolume = 64;
else
channel->channelvolume = 0;
}
}
update_tremor(channel);
update_retrig(sigrenderer, channel);
if (channel->inv_loop_speed)
update_invert_loop(channel, playing ? playing->sample : NULL);
if (playing) {
playing->slide += channel->portamento;
if (sigrenderer->sigdata->flags & IT_LINEAR_SLIDES) {
if (channel->toneporta && channel->destnote < 120) {
int currpitch =
((playing->note - 60) << 8) + playing->slide;
int destpitch = (channel->destnote - 60) << 8;
if (currpitch > destpitch) {
currpitch -= channel->toneporta;
if (currpitch < destpitch) {
currpitch = destpitch;
channel->destnote = IT_NOTE_OFF;
}
} else if (currpitch < destpitch) {
currpitch += channel->toneporta;
if (currpitch > destpitch) {
currpitch = destpitch;
channel->destnote = IT_NOTE_OFF;
}
}
playing->slide = currpitch - ((playing->note - 60) << 8);
}
} else {
if (channel->toneporta && channel->destnote < 120) {
float amiga_multiplier =
playing->sample->C5_speed * (1.0f / AMIGA_DIVISOR);
float deltanote =
(float)pow(DUMB_SEMITONE_BASE, 60 - playing->note);
/* deltanote is 1.0 for C-5, 0.5 for C-6, etc. */
float deltaslid =
deltanote - playing->slide * amiga_multiplier;
float destdelta =
(float)pow(DUMB_SEMITONE_BASE, 60 - channel->destnote);
if (deltaslid < destdelta) {
playing->slide -= channel->toneporta;
deltaslid =
deltanote - playing->slide * amiga_multiplier;
if (deltaslid > destdelta) {
playing->note = channel->destnote;
playing->slide = 0;
channel->destnote = IT_NOTE_OFF;
}
} else {
playing->slide += channel->toneporta;
deltaslid =
deltanote - playing->slide * amiga_multiplier;
if (deltaslid < destdelta) {
playing->note = channel->destnote;
playing->slide = 0;
channel->destnote = IT_NOTE_OFF;
}
}
}
}
update_playing_effects(playing);
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
IT_PLAYING *playing = sigrenderer->playing[i];
if (playing)
update_playing_effects(playing);
}
update_smooth_effects(sigrenderer);
}
static void it_note_off(IT_PLAYING *playing);
// This function should be renamed; it doesn't do the 'Update Pattern Variables'
// operation ittech.txt describes
/* Returns 1 if a pattern loop is happening. */
static int update_pattern_variables(DUMB_IT_SIGRENDERER *sigrenderer,
IT_ENTRY *entry) {
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
if (entry->mask & IT_ENTRY_EFFECT) {
switch (entry->effect) {
case IT_JUMP_TO_ORDER:
/* XXX jump and break in same row */
if (((sigrenderer->processrow | 0xC00) == 0xFFFE) &&
!(sigrenderer->processrow & 0x800)) {
sigrenderer->processrow = 0xFFFE & ~0xC00;
} else {
sigrenderer->breakrow = 0;
sigrenderer->processrow = 0xFFFE & ~0x400;
}
sigrenderer->processorder = entry->effectvalue - 1;
break;
case IT_S: {
unsigned char effectvalue = entry->effectvalue;
if (sigrenderer->sigdata->flags & IT_WAS_AN_S3M) {
if (effectvalue == 0)
effectvalue = channel->lastDKL;
channel->lastDKL = effectvalue;
} else {
if (effectvalue == 0)
effectvalue = channel->lastS;
}
channel->lastS = effectvalue;
switch (effectvalue >> 4) {
case IT_S_PATTERN_LOOP: {
unsigned char v = effectvalue & 15;
if (v == 0) {
#ifdef BIT_ARRAY_BULLSHIT
if (!channel->played_patjump)
channel->played_patjump = bit_array_create(256);
else {
if (channel->played_patjump_order != 0xFFFE &&
channel->played_patjump_order != sigrenderer->order)
bit_array_merge(
sigrenderer->played, channel->played_patjump,
channel->played_patjump_order * 256);
// if (channel->played_patjump_order !=
// sigrenderer->order)
bit_array_reset(channel->played_patjump);
}
channel->played_patjump_order = sigrenderer->order;
#endif
channel->pat_loop_row = sigrenderer->processrow;
} else {
if (channel->pat_loop_count == 0) {
#ifdef BIT_ARRAY_BULLSHIT
/* wft, uninitialized and no start marker yet... */
if (channel->played_patjump_order == 0xFFFE) {
int n;
bit_array_destroy(channel->played_patjump);
channel->played_patjump = bit_array_create(256);
for (n = channel->pat_loop_row;
n <= sigrenderer->row; n++)
bit_array_clear(sigrenderer->played,
sigrenderer->order * 256 + n);
channel->played_patjump_order = sigrenderer->order;
} else if (channel->played_patjump_order ==
sigrenderer->order) {
bit_array_set(channel->played_patjump,
sigrenderer->row);
bit_array_mask(sigrenderer->played,
channel->played_patjump,
channel->played_patjump_order * 256);
// bit_array_reset(channel->played_patjump);
}
#endif
channel->pat_loop_count = v;
sigrenderer->breakrow = channel->pat_loop_row;
if ((sigrenderer->sigdata->flags &
(IT_WAS_AN_XM | IT_WAS_A_MOD)) == IT_WAS_AN_XM) {
/* For XM files, if a loop occurs by itself, keep
* breakrow set for when the pattern ends - fun bug
* in FT2! */
if ((sigrenderer->processrow | 0xC00) < 0xFFFE) {
/* Infinite pattern loops are possible, so we
* check whether the pattern loop we're hitting
* now is earlier than the last one we hit. */
if (sigrenderer->processrow <
channel->pat_loop_end_row)
sigrenderer->processorder =
0xFFFE; /* suspect infinite loop, so
trigger loop callback */
else
sigrenderer->processorder =
0xFFFF; /* don't trigger loop callback
*/
channel->pat_loop_end_row =
sigrenderer->processrow;
sigrenderer->processrow =
0xFFFF; /* special case: don't reset
breakrow or pat_loop_end_row */
}
} else {
/* IT files do this regardless of other flow control
* effects seen here. */
sigrenderer->processorder =
0xFFFF; /* special case: don't trigger loop
callback */
sigrenderer->processrow = 0xFFFE;
}
return 1;
} else if (--channel->pat_loop_count) {
#ifdef BIT_ARRAY_BULLSHIT
if (channel->played_patjump_order ==
sigrenderer->order) {
bit_array_set(channel->played_patjump,
sigrenderer->row);
bit_array_mask(sigrenderer->played,
channel->played_patjump,
channel->played_patjump_order * 256);
// bit_array_reset(channel->played_patjump);
}
#endif
sigrenderer->breakrow = channel->pat_loop_row;
if ((sigrenderer->sigdata->flags &
(IT_WAS_AN_XM | IT_WAS_A_MOD)) == IT_WAS_AN_XM) {
/* For XM files, if a loop occurs by itself, keep
* breakrow set for when the pattern ends - fun bug
* in FT2! */
if ((sigrenderer->processrow | 0xC00) < 0xFFFE) {
/* Infinite pattern loops are possible, so we
* check whether the pattern loop we're hitting
* now is earlier than the last one we hit. */
if (sigrenderer->processrow <
channel->pat_loop_end_row)
sigrenderer->processorder =
0xFFFE; /* suspect infinite loop, so
trigger loop callback */
else
sigrenderer->processorder =
0xFFFF; /* don't trigger loop callback
*/
channel->pat_loop_end_row =
sigrenderer->processrow;
sigrenderer->processrow =
0xFFFF; /* special case: don't reset
breakrow or pat_loop_end_row */
}
} else {
/* IT files do this regardless of other flow control
* effects seen here. */
sigrenderer->processorder =
0xFFFF; /* special case: don't trigger loop
callback */
sigrenderer->processrow = 0xFFFE;
}
return 1;
} else if ((sigrenderer->sigdata->flags &
(IT_WAS_AN_XM | IT_WAS_A_MOD)) ==
IT_WAS_AN_XM) {
channel->pat_loop_end_row = 0;
// TODO
/* Findings:
- If a pattern loop completes successfully, and then the
pattern terminates, then the next pattern will start on
the row corresponding to the E60.
- If a pattern loop doesn't do any loops, and then the
pattern terminates, then the next pattern will start on
the first row.
- If a break appears to the left of the pattern loop, it
jumps into the relevant position in the next pattern,
and that's it.
- If a break appears to the right of the pattern loop,
it jumps to the start of the next pattern, and that's
it.
- If we jump, then effect a loop using an old E60, and
then the pattern ends, the next pattern starts on the
row corresponding to the E60.
- Theory: breakrow is not cleared when it's a pattern
loop effect!
*/
if ((sigrenderer->processrow | 0xC00) <
0xFFFE) // I have no idea if this is correct or not
// - FT2 is so weird :(
sigrenderer->breakrow =
channel->pat_loop_row; /* emulate bug in FT2 */
} else
channel->pat_loop_row = sigrenderer->processrow + 1;
#ifdef BIT_ARRAY_BULLSHIT
/*channel->played_patjump_order |= 0x8000;*/
if (channel->played_patjump_order == sigrenderer->order) {
bit_array_destroy(channel->played_patjump);
channel->played_patjump = 0;
channel->played_patjump_order = 0xFFFE;
}
bit_array_clear(sigrenderer->played,
sigrenderer->order * 256 +
sigrenderer->row);
#endif
}
} break;
case IT_S_PATTERN_DELAY:
sigrenderer->rowcount = 1 + (effectvalue & 15);
break;
}
}
}
}
return 0;
}
/* This function guarantees that channel->sample will always be valid if it
* is nonzero. In other words, to check if it is valid, simply check if it is
* nonzero.
*/
static void instrument_to_sample(DUMB_IT_SIGDATA *sigdata,
IT_CHANNEL *channel) {
if (sigdata->flags & IT_USE_INSTRUMENTS) {
if (channel->instrument >= 1 &&
channel->instrument <= sigdata->n_instruments) {
if (channel->note < 120) {
channel->sample = sigdata->instrument[channel->instrument - 1]
.map_sample[channel->note];
channel->truenote = sigdata->instrument[channel->instrument - 1]
.map_note[channel->note];
} else
channel->sample = 0;
} else
channel->sample = 0;
} else {
channel->sample = channel->instrument;
channel->truenote = channel->note;
}
if (!(channel->sample >= 1 && channel->sample <= sigdata->n_samples &&
(sigdata->sample[channel->sample - 1].flags & IT_SAMPLE_EXISTS) &&
sigdata->sample[channel->sample - 1].C5_speed))
channel->sample = 0;
}
static void fix_sample_looping(IT_PLAYING *playing) {
if ((playing->sample->flags & (IT_SAMPLE_LOOP | IT_SAMPLE_SUS_LOOP)) ==
(IT_SAMPLE_LOOP | IT_SAMPLE_SUS_LOOP)) {
if (playing->resampler.dir < 0) {
playing->resampler.pos = (playing->sample->sus_loop_end << 1) - 1 -
playing->resampler.pos;
playing->resampler.subpos ^= 65535;
playing->resampler.dir = 1;
}
playing->resampler.pos += playing->time_lost;
// XXX what
playing->time_lost = 0;
}
}
static void it_compatible_gxx_retrigger(DUMB_IT_SIGDATA *sigdata,
IT_CHANNEL *channel) {
int flags = 0;
if (channel->sample) {
if (sigdata->flags & IT_USE_INSTRUMENTS) {
if (!(channel->playing->flags & IT_PLAYING_SUSTAINOFF)) {
if (channel->playing->env_instrument->volume_envelope.flags &
IT_ENVELOPE_CARRY)
flags |= 1;
if (channel->playing->env_instrument->pan_envelope.flags &
IT_ENVELOPE_CARRY)
flags |= 2;
if (channel->playing->env_instrument->pitch_envelope.flags &
IT_ENVELOPE_CARRY)
flags |= 4;
}
}
}
if (!(flags & 1)) {
channel->playing->volume_envelope.next_node = 0;
channel->playing->volume_envelope.tick = 0;
}
if (!(flags & 2)) {
channel->playing->pan_envelope.next_node = 0;
channel->playing->pan_envelope.tick = 0;
}
if (!(flags & 4)) {
channel->playing->pitch_envelope.next_node = 0;
channel->playing->pitch_envelope.tick = 0;
}
channel->playing->fadeoutcount = 1024;
// Should we remove IT_PLAYING_BACKGROUND? Test with sample with sustain
// loop...
channel->playing->flags &= ~(IT_PLAYING_BACKGROUND | IT_PLAYING_SUSTAINOFF |
IT_PLAYING_FADING | IT_PLAYING_DEAD);
it_playing_update_resamplers(channel->playing);
if (!flags && channel->sample)
if (sigdata->flags & IT_USE_INSTRUMENTS)
channel->playing->env_instrument =
&sigdata->instrument[channel->instrument - 1];
}
static void it_note_off(IT_PLAYING *playing) {
if (playing) {
playing->enabled_envelopes |= IT_ENV_VOLUME;
playing->flags |= IT_PLAYING_BACKGROUND | IT_PLAYING_SUSTAINOFF;
fix_sample_looping(playing);
it_playing_update_resamplers(playing);
if (playing->instrument)
if ((playing->instrument->volume_envelope.flags &
(IT_ENVELOPE_ON | IT_ENVELOPE_LOOP_ON)) != IT_ENVELOPE_ON)
playing->flags |= IT_PLAYING_FADING;
}
}
static void xm_note_off(DUMB_IT_SIGDATA *sigdata, IT_CHANNEL *channel) {
if (channel->playing) {
if (!channel->instrument ||
channel->instrument > sigdata->n_instruments ||
!(sigdata->instrument[channel->instrument - 1]
.volume_envelope.flags &
IT_ENVELOPE_ON))
// if (!(entry->mask & IT_ENTRY_INSTRUMENT))
// dunno what that was there for ...
channel->volume = 0;
channel->playing->flags |= IT_PLAYING_SUSTAINOFF | IT_PLAYING_FADING;
it_playing_update_resamplers(channel->playing);
}
}
static void recalculate_it_envelope_node(IT_PLAYING_ENVELOPE *pe,
IT_ENVELOPE *e) {
int envpos = pe->tick;
unsigned int pt = e->n_nodes - 1;
unsigned int i;
for (i = 0; i < (unsigned int)(e->n_nodes - 1); ++i) {
if (envpos <= e->node_t[i]) {
pt = i;
break;
}
}
pe->next_node = pt;
}
static void recalculate_it_envelope_nodes(IT_PLAYING *playing) {
recalculate_it_envelope_node(&playing->volume_envelope,
&playing->env_instrument->volume_envelope);
recalculate_it_envelope_node(&playing->pan_envelope,
&playing->env_instrument->pitch_envelope);
recalculate_it_envelope_node(&playing->pitch_envelope,
&playing->env_instrument->pitch_envelope);
}
static void it_retrigger_note(DUMB_IT_SIGRENDERER *sigrenderer,
IT_CHANNEL *channel) {
int vol_env_tick = 0;
int pan_env_tick = 0;
int pitch_env_tick = 0;
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
unsigned char nna = ~0;
int i, envelopes_copied = 0;
if (channel->playing) {
if (channel->note == IT_NOTE_CUT)
nna = NNA_NOTE_CUT;
else if (channel->note == IT_NOTE_OFF)
nna = NNA_NOTE_OFF;
else if (channel->note > 120)
nna = NNA_NOTE_FADE;
else if (!channel->playing->instrument ||
(channel->playing->flags & IT_PLAYING_DEAD))
nna = NNA_NOTE_CUT;
else if (channel->new_note_action != 0xFF) {
nna = channel->new_note_action;
} else
nna = channel->playing->instrument->new_note_action;
if (!(channel->playing->flags & IT_PLAYING_SUSTAINOFF)) {
if (nna != NNA_NOTE_CUT)
vol_env_tick = channel->playing->volume_envelope.tick;
pan_env_tick = channel->playing->pan_envelope.tick;
pitch_env_tick = channel->playing->pitch_envelope.tick;
envelopes_copied = 1;
}
switch (nna) {
case NNA_NOTE_CUT:
channel->playing->declick_stage = 3;
break;
case NNA_NOTE_OFF:
it_note_off(channel->playing);
break;
case NNA_NOTE_FADE:
channel->playing->flags |=
IT_PLAYING_BACKGROUND | IT_PLAYING_FADING;
break;
}
}
channel->new_note_action = 0xFF;
if (channel->sample == 0 || channel->note > 120)
return;
channel->destnote = IT_NOTE_OFF;
if (channel->playing) {
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (!sigrenderer->playing[i]) {
sigrenderer->playing[i] = channel->playing;
channel->playing = NULL;
break;
}
}
if (sigrenderer->sigdata->flags & IT_USE_INSTRUMENTS) {
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
IT_PLAYING *playing = sigrenderer->playing[i];
if (playing && playing->channel == channel &&
playing->instrument->dup_check_type) {
int match = 1;
switch (playing->instrument->dup_check_type) {
case DCT_NOTE:
match = (channel->truenote == playing->note);
case DCT_SAMPLE:
match = match && (channel->sample == playing->sampnum);
case DCT_INSTRUMENT:
match =
match && (channel->instrument == playing->instnum);
break;
}
if (match) {
switch (playing->instrument->dup_check_action) {
case DCA_NOTE_CUT:
playing->declick_stage = 3;
if (channel->playing == playing)
channel->playing = NULL;
break;
case DCA_NOTE_OFF:
if (!(playing->flags & IT_PLAYING_SUSTAINOFF))
it_note_off(playing);
break;
case DCA_NOTE_FADE:
playing->flags |=
IT_PLAYING_BACKGROUND | IT_PLAYING_FADING;
break;
}
}
}
}
}
/** WARNING - come up with some more heuristics for replacing old notes */
#if 0
if (channel->playing) {
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer->playing[i]->flags & IT_PLAYING_BACKGROUND) {
write_seqtime();
sequence_c(SEQUENCE_STOP_SIGNAL);
sequence_c(i);
channel->VChannel = &module->VChannel[i];
break;
}
}
}
#endif
}
if (channel->playing)
free_playing(channel->playing);
channel->playing = new_playing();
if (!channel->playing)
return;
if (!envelopes_copied && sigdata->flags & IT_USE_INSTRUMENTS) {
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
IT_PLAYING *playing = sigrenderer->playing[i];
if (!playing || playing->channel != channel)
continue;
if (playing->flags & IT_PLAYING_SUSTAINOFF)
continue;
if (nna != NNA_NOTE_CUT)
vol_env_tick = playing->volume_envelope.tick;
pan_env_tick = playing->pan_envelope.tick;
pitch_env_tick = playing->pitch_envelope.tick;
envelopes_copied = 1;
break;
}
}
channel->playing->flags = 0;
channel->playing->resampling_quality = sigrenderer->resampling_quality;
channel->playing->channel = channel;
channel->playing->sample = &sigdata->sample[channel->sample - 1];
if (sigdata->flags & IT_USE_INSTRUMENTS)
channel->playing->instrument =
&sigdata->instrument[channel->instrument - 1];
else
channel->playing->instrument = NULL;
channel->playing->env_instrument = channel->playing->instrument;
channel->playing->sampnum = channel->sample;
channel->playing->instnum = channel->instrument;
channel->playing->declick_stage = 0;
channel->playing->channel_volume = channel->channelvolume;
channel->playing->note = channel->truenote;
channel->playing->enabled_envelopes = 0;
channel->playing->volume_offset = 0;
channel->playing->panning_offset = 0;
// channel->playing->output = channel->output;
if (sigdata->flags & IT_USE_INSTRUMENTS) {
IT_PLAYING *playing = channel->playing;
IT_INSTRUMENT *instrument = playing->instrument;
if (instrument->volume_envelope.flags & IT_ENVELOPE_ON)
playing->enabled_envelopes |= IT_ENV_VOLUME;
if (instrument->pan_envelope.flags & IT_ENVELOPE_ON)
playing->enabled_envelopes |= IT_ENV_PANNING;
if (instrument->pitch_envelope.flags & IT_ENVELOPE_ON)
playing->enabled_envelopes |= IT_ENV_PITCH;
if (instrument->random_volume)
playing->volume_offset =
(rand() % (instrument->random_volume * 2 + 1)) -
instrument->random_volume;
if (instrument->random_pan)
playing->panning_offset =
(rand() % (instrument->random_pan * 2 + 1)) -
instrument->random_pan;
// if (instrument->output) playing->output = instrument->output;
}
channel->playing->filter_cutoff = 127;
channel->playing->filter_resonance = 0;
channel->playing->true_filter_cutoff = 127 << 8;
channel->playing->true_filter_resonance = 0;
channel->playing->vibrato_speed = 0;
channel->playing->vibrato_depth = 0;
channel->playing->vibrato_n = 0;
channel->playing->vibrato_time = 0;
channel->playing->vibrato_waveform = channel->vibrato_waveform;
channel->playing->tremolo_speed = 0;
channel->playing->tremolo_depth = 0;
channel->playing->tremolo_time = 0;
channel->playing->tremolo_waveform = channel->tremolo_waveform;
channel->playing->panbrello_speed = 0;
channel->playing->panbrello_depth = 0;
channel->playing->panbrello_time = 0;
channel->playing->panbrello_waveform = channel->panbrello_waveform;
channel->playing->panbrello_random = 0;
channel->playing->sample_vibrato_time = 0;
channel->playing->sample_vibrato_waveform =
channel->playing->sample->vibrato_waveform;
channel->playing->sample_vibrato_depth = 0;
channel->playing->slide = 0;
channel->playing->finetune = channel->playing->sample->finetune;
if (sigdata->flags & IT_USE_INSTRUMENTS) {
if (envelopes_copied &&
channel->playing->env_instrument->volume_envelope.flags &
IT_ENVELOPE_CARRY) {
channel->playing->volume_envelope.tick = vol_env_tick;
} else {
channel->playing->volume_envelope.tick = 0;
}
if (envelopes_copied &&
channel->playing->env_instrument->pan_envelope.flags &
IT_ENVELOPE_CARRY) {
channel->playing->pan_envelope.tick = pan_env_tick;
} else {
channel->playing->pan_envelope.tick = 0;
}
if (envelopes_copied &&
channel->playing->env_instrument->pitch_envelope.flags &
IT_ENVELOPE_CARRY) {
channel->playing->pitch_envelope.tick = pitch_env_tick;
} else {
channel->playing->pitch_envelope.tick = 0;
}
recalculate_it_envelope_nodes(channel->playing);
}
channel->playing->fadeoutcount = 1024;
it_reset_filter_state(&channel->playing->filter_state[0]);
it_reset_filter_state(&channel->playing->filter_state[1]);
it_playing_reset_resamplers(channel->playing, 0);
/** WARNING - is everything initialised? */
}
static void get_default_volpan(DUMB_IT_SIGDATA *sigdata, IT_CHANNEL *channel) {
if (channel->sample == 0)
return;
channel->volume = sigdata->sample[channel->sample - 1].default_volume;
if (sigdata->flags & IT_WAS_AN_XM) {
if (!(sigdata->flags & IT_WAS_A_MOD))
channel->truepan =
32 + sigdata->sample[channel->sample - 1].default_pan * 64;
return;
}
{
int pan = sigdata->sample[channel->sample - 1].default_pan;
if (pan >= 128 && pan <= 192) {
channel->pan = pan - 128;
return;
}
}
if (sigdata->flags & IT_USE_INSTRUMENTS) {
IT_INSTRUMENT *instrument =
&sigdata->instrument[channel->instrument - 1];
if (instrument->default_pan <= 64)
channel->pan = instrument->default_pan;
if (instrument->filter_cutoff >= 128)
channel->filter_cutoff = instrument->filter_cutoff - 128;
if (instrument->filter_resonance >= 128)
channel->filter_resonance = instrument->filter_resonance - 128;
}
}
static void get_true_pan(DUMB_IT_SIGDATA *sigdata, IT_CHANNEL *channel) {
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
if (channel->sample && !IT_IS_SURROUND_SHIFTED(channel->truepan) &&
(sigdata->flags & IT_USE_INSTRUMENTS)) {
IT_INSTRUMENT *instrument =
&sigdata->instrument[channel->instrument - 1];
int truepan = channel->truepan;
truepan +=
(channel->note - instrument->pp_centre) * instrument->pp_separation
<< (IT_ENVELOPE_SHIFT - 3);
channel->truepan =
(unsigned short)MID(0, truepan, 64 << IT_ENVELOPE_SHIFT);
}
}
static void post_process_it_volpan(DUMB_IT_SIGRENDERER *sigrenderer,
IT_ENTRY *entry) {
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
if (entry->mask & IT_ENTRY_VOLPAN) {
if (entry->volpan <= 84) {
/* Volume */
/* Fine volume slide up */
/* Fine volume slide down */
} else if (entry->volpan <= 94) {
/* Volume slide up */
unsigned char v = entry->volpan - 85;
if (v == 0)
v = channel->lastvolslide;
channel->lastvolslide = v;
/* = effect Dx0 where x == entry->volpan - 85 */
channel->volslide += v;
} else if (entry->volpan <= 104) {
/* Volume slide down */
unsigned char v = entry->volpan - 95;
if (v == 0)
v = channel->lastvolslide;
channel->lastvolslide = v;
/* = effect D0x where x == entry->volpan - 95 */
channel->volslide -= v;
} else if (entry->volpan <= 114) {
/* Portamento down */
unsigned char v = (entry->volpan - 105) << 2;
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
channel->portamento -= v << 4;
} else if (entry->volpan <= 124) {
/* Portamento up */
unsigned char v = (entry->volpan - 115) << 2;
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
channel->portamento += v << 4;
} else if (entry->volpan <= 202) {
/* Pan */
/* Tone Portamento */
} else if (entry->volpan <= 212) {
/* Vibrato */
/* This is unaffected by IT_OLD_EFFECTS. However, if v == 0, then
* any doubling of depth that happened before (with Hxy in the
* effect column) will be preserved. */
unsigned char v = entry->volpan - 203;
if (v == 0)
v = channel->lastHdepth;
else {
v <<= 2;
channel->lastHdepth = v;
}
if (channel->playing) {
channel->playing->vibrato_speed = channel->lastHspeed;
channel->playing->vibrato_depth = v;
channel->playing->vibrato_n++;
}
}
}
}
static void it_send_midi(DUMB_IT_SIGRENDERER *sigrenderer, IT_CHANNEL *channel,
unsigned char midi_byte) {
if (sigrenderer->callbacks->midi)
if ((*sigrenderer->callbacks->midi)(
sigrenderer->callbacks->midi_data,
(int)(channel - sigrenderer->channel), midi_byte))
return;
switch (channel->midi_state) {
case 4: /* Ready to receive resonance parameter */
if (midi_byte < 0x80)
channel->filter_resonance = midi_byte;
channel->midi_state = 0;
break;
case 3: /* Ready to receive cutoff parameter */
if (midi_byte < 0x80)
channel->filter_cutoff = midi_byte;
channel->midi_state = 0;
break;
case 2: /* Ready for byte specifying which parameter will follow */
if (midi_byte == 0) /* Cutoff */
channel->midi_state = 3;
else if (midi_byte == 1) /* Resonance */
channel->midi_state = 4;
else
channel->midi_state = 0;
break;
default: /* Counting initial F0 bytes */
switch (midi_byte) {
case 0xF0:
channel->midi_state++;
break;
case 0xFA:
case 0xFC:
case 0xFF:
/* Reset filter parameters for all channels */
{
int i;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
sigrenderer->channel[i].filter_cutoff = 127;
sigrenderer->channel[i].filter_resonance = 0;
//// should we be resetting channel[i].playing->filter_*
/// here?
}
}
/* Fall through */
default:
channel->midi_state = 0;
break;
}
}
}
static void xm_envelope_calculate_value(IT_ENVELOPE *envelope,
IT_PLAYING_ENVELOPE *pe) {
if (pe->next_node <= 0)
pe->value = envelope->node_y[0] << IT_ENVELOPE_SHIFT;
else if (pe->next_node >= envelope->n_nodes)
pe->value = envelope->node_y[envelope->n_nodes - 1]
<< IT_ENVELOPE_SHIFT;
else {
int ys = envelope->node_y[pe->next_node - 1] << IT_ENVELOPE_SHIFT;
int ts = envelope->node_t[pe->next_node - 1];
int te = envelope->node_t[pe->next_node];
if (ts == te)
pe->value = ys;
else {
int ye = envelope->node_y[pe->next_node] << IT_ENVELOPE_SHIFT;
int t = pe->tick;
pe->value = ys + (ye - ys) * (t - ts) / (te - ts);
}
}
}
extern const char xm_convert_vibrato[];
const char mod_convert_vibrato[] = {
IT_VIBRATO_SINE,
IT_VIBRATO_RAMP_UP, /* this will be inverted by IT_OLD_EFFECTS */
IT_VIBRATO_XM_SQUARE, IT_VIBRATO_XM_SQUARE};
/* Returns 1 if a callback caused termination of playback. */
static int process_effects(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry,
int ignore_cxx) {
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
IT_PLAYING *playing;
int i;
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
if (entry->mask & IT_ENTRY_EFFECT) {
switch (entry->effect) {
/*
Notes about effects (as compared to other module formats)
C This is now in *HEX*. (Used to be in decimal in ST3)
E/F/G/H/U You need to check whether the song uses Amiga/Linear
slides. H/U Vibrato in Impulse Tracker is two times
finer than in any other tracker and is updated EVERY tick. If "Old
Effects" is *ON*, then the vibrato is played in the normal manner
(every non-row tick and normal depth) E/F/G These commands
ALL share the same memory. Oxx Offsets to samples are to
the 'xx00th' SAMPLE. (ie. for 16 bit samples, the offset is xx00h*2)
Oxx past the sample end will be ignored, unless "Old
Effects" is ON, in which case the Oxx will play from the end of the
sample.
Yxy This uses a table 4 times larger (hence 4 times
slower) than vibrato or tremelo. If the waveform is set to random,
then the 'speed' part of the command is interpreted as a delay.
*/
case IT_SET_SPEED:
if (entry->effectvalue) {
/*if (entry->effectvalue == 255)
if (sigrenderer->callbacks->xm_speed_zero &&
(*sigrenderer->callbacks->xm_speed_zero)(sigrenderer->callbacks->xm_speed_zero_data))
return 1;*/
if (sigdata->flags & IT_WAS_AN_STM) {
int n = entry->effectvalue;
if (n >= 32) {
sigrenderer->tick = sigrenderer->speed = n;
}
} else {
sigrenderer->tick = sigrenderer->speed = entry->effectvalue;
}
} else if ((sigdata->flags & (IT_WAS_AN_XM | IT_WAS_A_MOD)) ==
IT_WAS_AN_XM) {
#ifdef BIT_ARRAY_BULLSHIT
bit_array_set(sigrenderer->played,
sigrenderer->order * 256 + sigrenderer->row);
#endif
sigrenderer->speed = 0;
#ifdef BIT_ARRAY_BULLSHIT
sigrenderer->looped = 1;
#endif
if (sigrenderer->callbacks->xm_speed_zero &&
(*sigrenderer->callbacks->xm_speed_zero)(
sigrenderer->callbacks->xm_speed_zero_data))
return 1;
}
break;
case IT_BREAK_TO_ROW:
if (ignore_cxx)
break;
sigrenderer->breakrow = entry->effectvalue;
/* XXX jump and break on the same row */
if (((sigrenderer->processrow | 0xC00) == 0xFFFE) &&
!(sigrenderer->processrow & 0x400)) {
sigrenderer->processrow = 0xFFFE & ~0xC00;
} else {
sigrenderer->processorder = sigrenderer->order;
sigrenderer->processrow = 0xFFFE & ~0x800;
}
break;
case IT_VOLSLIDE_VIBRATO:
for (i = -1; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (i < 0)
playing = channel->playing;
else {
playing = sigrenderer->playing[i];
if (!playing || playing->channel != channel)
continue;
}
if (playing) {
playing->vibrato_speed = channel->lastHspeed;
playing->vibrato_depth = channel->lastHdepth;
playing->vibrato_n++;
}
}
/* Fall through and process volume slide. */
case IT_VOLUME_SLIDE:
case IT_VOLSLIDE_TONEPORTA:
/* The tone portamento component is handled elsewhere. */
{
unsigned char v = entry->effectvalue;
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0)
v = channel->lastDKL;
channel->lastDKL = v;
}
if (!(sigdata->flags & IT_WAS_AN_XM)) {
int clip = (sigdata->flags & IT_WAS_AN_S3M) ? 63 : 64;
if ((v & 0x0F) == 0x0F) {
if (!(v & 0xF0)) {
channel->volslide = -15;
channel->volume -= 15;
if (channel->volume > clip)
channel->volume = 0;
} else {
channel->volume += v >> 4;
if (channel->volume > clip)
channel->volume = clip;
}
} else if ((v & 0xF0) == 0xF0) {
if (!(v & 0x0F)) {
channel->volslide = 15;
channel->volume += 15;
if (channel->volume > clip)
channel->volume = clip;
} else {
channel->volume -= v & 15;
if (channel->volume > clip)
channel->volume = 0;
}
} else if (!(v & 0x0F)) {
channel->volslide = v >> 4;
} else {
channel->volslide = -(v & 15);
}
} else {
if ((v & 0x0F) == 0) { /* Dx0 */
channel->volslide = v >> 4;
} else if ((v & 0xF0) == 0) { /* D0x */
channel->volslide = -v;
} else if ((v & 0x0F) == 0x0F) { /* DxF */
channel->volume += v >> 4;
if (channel->volume > 64)
channel->volume = 64;
} else if ((v & 0xF0) == 0xF0) { /* DFx */
channel->volume -= v & 15;
if (channel->volume > 64)
channel->volume = 0;
}
}
}
break;
case IT_XM_FINE_VOLSLIDE_DOWN: {
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->xm_lastEB;
channel->xm_lastEB = v;
channel->volume -= v;
if (channel->volume > 64)
channel->volume = 0;
} break;
case IT_XM_FINE_VOLSLIDE_UP: {
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->xm_lastEA;
channel->xm_lastEA = v;
channel->volume += v;
if (channel->volume > 64)
channel->volume = 64;
} break;
case IT_PORTAMENTO_DOWN: {
unsigned char v = entry->effectvalue;
if (sigdata->flags & (IT_WAS_AN_XM | IT_WAS_A_669)) {
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0xF0)
v |= channel->xm_lastE2;
else if (v >= 0xF0)
channel->xm_lastE2 = v & 15;
else if (v == 0xE0)
v |= channel->xm_lastX2;
else
channel->xm_lastX2 = v & 15;
}
} else if (sigdata->flags & IT_WAS_AN_S3M) {
if (v == 0)
v = channel->lastDKL;
channel->lastDKL = v;
} else {
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
}
for (i = -1; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (i < 0)
playing = channel->playing;
else {
playing = sigrenderer->playing[i];
if (!playing || playing->channel != channel)
continue;
}
if (playing) {
if ((v & 0xF0) == 0xF0)
playing->slide -= (v & 15) << 4;
else if ((v & 0xF0) == 0xE0)
playing->slide -= (v & 15) << 2;
else if (i < 0 && sigdata->flags & IT_WAS_A_669)
channel->portamento -= v << 3;
else if (i < 0)
channel->portamento -= v << 4;
}
}
} break;
case IT_PORTAMENTO_UP: {
unsigned char v = entry->effectvalue;
if (sigdata->flags & (IT_WAS_AN_XM | IT_WAS_A_669)) {
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0xF0)
v |= channel->xm_lastE1;
else if (v >= 0xF0)
channel->xm_lastE1 = v & 15;
else if (v == 0xE0)
v |= channel->xm_lastX1;
else
channel->xm_lastX1 = v & 15;
}
} else if (sigdata->flags & IT_WAS_AN_S3M) {
if (v == 0)
v = channel->lastDKL;
channel->lastDKL = v;
} else {
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
}
for (i = -1; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (i < 0)
playing = channel->playing;
else {
playing = sigrenderer->playing[i];
if (!playing || playing->channel != channel)
continue;
}
if (playing) {
if ((v & 0xF0) == 0xF0)
playing->slide += (v & 15) << 4;
else if ((v & 0xF0) == 0xE0)
playing->slide += (v & 15) << 2;
else if (i < 0 && sigdata->flags & IT_WAS_A_669)
channel->portamento += v << 3;
else if (i < 0)
channel->portamento += v << 4;
}
}
} break;
case IT_XM_PORTAMENTO_DOWN: {
unsigned char v = entry->effectvalue;
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0)
v = channel->lastJ;
channel->lastJ = v;
}
if (channel->playing)
channel->portamento -= v << 4;
} break;
case IT_XM_PORTAMENTO_UP: {
unsigned char v = entry->effectvalue;
if (!(sigdata->flags & IT_WAS_A_MOD)) {
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
}
if (channel->playing)
channel->portamento += v << 4;
} break;
case IT_XM_KEY_OFF:
channel->key_off_count = entry->effectvalue;
if (!channel->key_off_count)
xm_note_off(sigdata, channel);
break;
case IT_VIBRATO: {
if (entry->effectvalue || !(sigdata->flags & IT_WAS_A_669)) {
unsigned char speed = entry->effectvalue >> 4;
unsigned char depth = entry->effectvalue & 15;
if (speed == 0)
speed = channel->lastHspeed;
channel->lastHspeed = speed;
if (depth == 0)
depth = channel->lastHdepth;
else {
if (sigdata->flags & IT_OLD_EFFECTS &&
!(sigdata->flags & IT_WAS_A_MOD))
depth <<= 3;
else
depth <<= 2;
channel->lastHdepth = depth;
}
for (i = -1; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (i < 0)
playing = channel->playing;
else {
playing = sigrenderer->playing[i];
if (!playing || playing->channel != channel)
continue;
}
if (playing) {
playing->vibrato_speed = speed;
playing->vibrato_depth = depth;
playing->vibrato_n++;
}
}
}
} break;
case IT_TREMOR: {
unsigned char v = entry->effectvalue;
if (v == 0) {
if (sigdata->flags & IT_WAS_AN_S3M)
v = channel->lastDKL;
else
v = channel->lastI;
} else if (!(sigdata->flags & IT_OLD_EFFECTS)) {
if (v & 0xF0)
v -= 0x10;
if (v & 0x0F)
v -= 0x01;
}
if (sigdata->flags & IT_WAS_AN_S3M)
channel->lastDKL = v;
else
channel->lastI = v;
channel->tremor_time |= 128;
}
update_tremor(channel);
break;
case IT_ARPEGGIO: {
unsigned char v = entry->effectvalue;
/* XM files have no memory for arpeggio (000 = no effect)
* and we use lastJ for portamento down instead.
*/
if (!(sigdata->flags & IT_WAS_AN_XM)) {
if (sigdata->flags & IT_WAS_AN_S3M) {
if (v == 0)
v = channel->lastDKL;
channel->lastDKL = v;
} else {
if (v == 0)
v = channel->lastJ;
channel->lastJ = v;
}
}
channel->arpeggio_offsets[0] = 0;
channel->arpeggio_offsets[1] = (v & 0xF0) >> 4;
channel->arpeggio_offsets[2] = (v & 0x0F);
channel->arpeggio_table =
(const unsigned char *)(((sigdata->flags &
(IT_WAS_AN_XM | IT_WAS_A_MOD)) ==
IT_WAS_AN_XM)
? &arpeggio_xm
: &arpeggio_mod);
} break;
case IT_SET_CHANNEL_VOLUME:
if (sigdata->flags & IT_WAS_AN_XM)
channel->volume = MIN(entry->effectvalue, 64);
else if (entry->effectvalue <= 64)
channel->channelvolume = entry->effectvalue;
#ifdef VOLUME_OUT_OF_RANGE_SETS_MAXIMUM
else
channel->channelvolume = 64;
#endif
if (channel->playing)
channel->playing->channel_volume = channel->channelvolume;
break;
case IT_CHANNEL_VOLUME_SLIDE: {
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->lastN;
channel->lastN = v;
if ((v & 0x0F) == 0) { /* Nx0 */
channel->channelvolslide = v >> 4;
} else if ((v & 0xF0) == 0) { /* N0x */
channel->channelvolslide = -v;
} else {
if ((v & 0x0F) == 0x0F) { /* NxF */
channel->channelvolume += v >> 4;
if (channel->channelvolume > 64)
channel->channelvolume = 64;
} else if ((v & 0xF0) == 0xF0) { /* NFx */
channel->channelvolume -= v & 15;
if (channel->channelvolume > 64)
channel->channelvolume = 0;
} else
break;
if (channel->playing)
channel->playing->channel_volume = channel->channelvolume;
}
} break;
case IT_SET_SAMPLE_OFFSET: {
unsigned char v = entry->effectvalue;
/*if (sigdata->flags & IT_WAS_A_MOD) {
if (v == 0) break;
} else*/ {
if (v == 0)
v = channel->lastO;
channel->lastO = v;
}
/* Note: we set the offset even if tone portamento is
* specified. Impulse Tracker does the same.
*/
if (entry->mask & IT_ENTRY_NOTE) {
if (channel->playing) {
int offset =
((int)channel->high_offset << 16) | ((int)v << 8);
IT_PLAYING *playing = channel->playing;
IT_SAMPLE *sample = playing->sample;
int end;
if ((sample->flags & IT_SAMPLE_SUS_LOOP) &&
!(playing->flags & IT_PLAYING_SUSTAINOFF))
end = (int)sample->sus_loop_end;
else if (sample->flags & IT_SAMPLE_LOOP)
end = (int)sample->loop_end;
else {
end = (int)sample->length;
if (sigdata->flags & IT_WAS_PROCESSED &&
end > 64) // XXX bah damn LPC and edge case modules
end -= 64;
}
if ((sigdata->flags & IT_WAS_A_PTM) &&
(sample->flags & IT_SAMPLE_16BIT))
offset >>= 1;
if (offset < end) {
it_playing_reset_resamplers(playing, offset);
playing->declick_stage = 0;
} else if (sigdata->flags & IT_OLD_EFFECTS) {
it_playing_reset_resamplers(playing, end);
playing->declick_stage = 0;
}
}
}
} break;
case IT_PANNING_SLIDE:
/** JULIEN: guess what? the docs are wrong! (how unusual ;)
* Pxy seems to memorize its previous value... and there
* might be other mistakes like that... (sigh!)
*/
/** ENTHEH: umm... but... the docs say that Pxy memorises its
* value... don't they? :o
*/
{
unsigned char v = entry->effectvalue;
int p = channel->truepan;
if (sigdata->flags & IT_WAS_AN_XM) {
if (IT_IS_SURROUND(channel->pan)) {
channel->pan = 32;
p = 32 + 128 * 64;
}
p >>= 6;
} else {
if (IT_IS_SURROUND(channel->pan))
p = 32 << 8;
p = (p + 128) >> 8;
channel->pan = p;
}
if (v == 0)
v = channel->lastP;
channel->lastP = v;
if ((v & 0x0F) == 0) { /* Px0 */
channel->panslide = -(v >> 4);
} else if ((v & 0xF0) == 0) { /* P0x */
channel->panslide = v;
} else if ((v & 0x0F) == 0x0F) { /* PxF */
p -= v >> 4;
} else if ((v & 0xF0) == 0xF0) { /* PFx */
p += v & 15;
}
if (sigdata->flags & IT_WAS_AN_XM)
channel->truepan = 32 + MID(0, p, 255) * 64;
else {
if (p < 0)
p = 0;
else if (p > 64)
p = 64;
channel->pan = p;
channel->truepan = p << 8;
}
}
break;
case IT_RETRIGGER_NOTE: {
unsigned char v = entry->effectvalue;
if (sigdata->flags & IT_WAS_AN_XM) {
if ((v & 0x0F) == 0)
v |= channel->lastQ & 0x0F;
if ((v & 0xF0) == 0)
v |= channel->lastQ & 0xF0;
channel->lastQ = v;
} else if (sigdata->flags & IT_WAS_AN_S3M) {
if (v == 0)
v = channel->lastDKL;
channel->lastDKL = v;
} else {
if (v == 0)
v = channel->lastQ;
channel->lastQ = v;
}
if ((v & 0x0F) == 0)
v |= 0x01;
channel->retrig = v;
if (entry->mask & IT_ENTRY_NOTE) {
channel->retrig_tick = v & 0x0F;
/* Emulate a bug */
if (sigdata->flags & IT_WAS_AN_XM)
update_retrig(sigrenderer, channel);
} else
update_retrig(sigrenderer, channel);
} break;
case IT_XM_RETRIGGER_NOTE:
channel->retrig_tick = channel->xm_retrig = entry->effectvalue;
if (entry->effectvalue == 0)
if (channel->playing) {
it_playing_reset_resamplers(channel->playing, 0);
channel->playing->declick_stage = 0;
}
break;
case IT_TREMOLO: {
unsigned char speed, depth;
if (sigdata->flags & IT_WAS_AN_S3M) {
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->lastDKL;
channel->lastDKL = v;
speed = v >> 4;
depth = v & 15;
} else {
speed = entry->effectvalue >> 4;
depth = entry->effectvalue & 15;
if (speed == 0)
speed = channel->lastRspeed;
channel->lastRspeed = speed;
if (depth == 0)
depth = channel->lastRdepth;
channel->lastRdepth = depth;
}
for (i = -1; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (i < 0)
playing = channel->playing;
else {
playing = sigrenderer->playing[i];
if (!playing || playing->channel != channel)
continue;
}
if (playing) {
playing->tremolo_speed = speed;
playing->tremolo_depth = depth;
}
}
} break;
case IT_S: {
/* channel->lastS was set in update_pattern_variables(). */
unsigned char effectvalue = channel->lastS;
switch (effectvalue >> 4) {
// case IT_S_SET_FILTER:
/* Waveforms for commands S3x, S4x and S5x:
* 0: Sine wave
* 1: Ramp down
* 2: Square wave
* 3: Random wave
*/
case IT_S_SET_GLISSANDO_CONTROL:
channel->glissando = effectvalue & 15;
break;
case IT_S_FINETUNE:
if (channel->playing) {
channel->playing->finetune = ((int)(effectvalue & 15) - 8)
<< 5;
}
break;
case IT_S_SET_VIBRATO_WAVEFORM: {
int waveform = effectvalue & 3;
if (sigdata->flags & IT_WAS_A_MOD)
waveform = mod_convert_vibrato[waveform];
else if (sigdata->flags & IT_WAS_AN_XM)
waveform = xm_convert_vibrato[waveform];
channel->vibrato_waveform = waveform;
if (channel->playing) {
channel->playing->vibrato_waveform = waveform;
if (!(effectvalue & 4))
channel->playing->vibrato_time = 0;
}
} break;
case IT_S_SET_TREMOLO_WAVEFORM: {
int waveform = effectvalue & 3;
if (sigdata->flags & IT_WAS_A_MOD)
waveform = mod_convert_vibrato[waveform];
else if (sigdata->flags & IT_WAS_AN_XM)
waveform = xm_convert_vibrato[waveform];
channel->tremolo_waveform = waveform;
if (channel->playing) {
channel->playing->tremolo_waveform = waveform;
if (!(effectvalue & 4))
channel->playing->tremolo_time = 0;
}
} break;
case IT_S_SET_PANBRELLO_WAVEFORM:
channel->panbrello_waveform = effectvalue & 3;
if (channel->playing) {
channel->playing->panbrello_waveform = effectvalue & 3;
if (!(effectvalue & 4))
channel->playing->panbrello_time = 0;
}
break;
case IT_S_FINE_PATTERN_DELAY:
sigrenderer->tick += effectvalue & 15;
break;
#if 1
case IT_S7: {
if (sigrenderer->sigdata->flags & IT_USE_INSTRUMENTS) {
int i;
switch (effectvalue & 15) {
case 0: /* cut background notes */
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
IT_PLAYING *playing = sigrenderer->playing[i];
if (playing && channel == playing->channel) {
playing->declick_stage = 3;
if (channel->playing == playing)
channel->playing = NULL;
}
}
break;
case 1: /* release background notes */
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
IT_PLAYING *playing = sigrenderer->playing[i];
if (playing && channel == playing->channel &&
!(playing->flags & IT_PLAYING_SUSTAINOFF)) {
it_note_off(playing);
}
}
break;
case 2: /* fade background notes */
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
IT_PLAYING *playing = sigrenderer->playing[i];
if (playing && channel == playing->channel) {
// playing->flags &= IT_PLAYING_SUSTAINOFF;
playing->flags |= IT_PLAYING_FADING;
}
}
break;
case 3:
channel->new_note_action = NNA_NOTE_CUT;
break;
case 4:
channel->new_note_action = NNA_NOTE_CONTINUE;
break;
case 5:
channel->new_note_action = NNA_NOTE_OFF;
break;
case 6:
channel->new_note_action = NNA_NOTE_FADE;
break;
case 7:
if (channel->playing)
channel->playing->enabled_envelopes &=
~IT_ENV_VOLUME;
break;
case 8:
if (channel->playing)
channel->playing->enabled_envelopes |=
IT_ENV_VOLUME;
break;
case 9:
if (channel->playing)
channel->playing->enabled_envelopes &=
~IT_ENV_PANNING;
break;
case 10:
if (channel->playing)
channel->playing->enabled_envelopes |=
IT_ENV_PANNING;
break;
case 11:
if (channel->playing)
channel->playing->enabled_envelopes &=
~IT_ENV_PITCH;
break;
case 12:
if (channel->playing)
channel->playing->enabled_envelopes |= IT_ENV_PITCH;
break;
}
}
} break;
#endif
case IT_S_SET_PAN:
// ASSERT(!(sigdata->flags & IT_WAS_AN_XM));
channel->pan =
((effectvalue & 15) << 2) | ((effectvalue & 15) >> 2);
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
if (channel->playing)
channel->playing->panbrello_depth = 0;
break;
case IT_S_SET_SURROUND_SOUND:
if ((effectvalue & 15) == 15) {
if (channel->playing && channel->playing->sample &&
!(channel->playing->sample->flags &
(IT_SAMPLE_LOOP | IT_SAMPLE_SUS_LOOP))) {
channel->playing->flags |= IT_PLAYING_REVERSE;
it_playing_reset_resamplers(
channel->playing,
channel->playing->sample->length - 1);
}
} else if ((effectvalue & 15) == 1) {
channel->pan = IT_SURROUND;
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
}
if (channel->playing)
channel->playing->panbrello_depth = 0;
break;
case IT_S_SET_HIGH_OFFSET:
channel->high_offset = effectvalue & 15;
break;
// case IT_S_PATTERN_LOOP:
case IT_S_DELAYED_NOTE_CUT:
channel->note_cut_count = effectvalue & 15;
if (!channel->note_cut_count) {
if (sigdata->flags & (IT_WAS_AN_XM | IT_WAS_A_PTM))
channel->volume = 0;
else
channel->note_cut_count = 1;
}
break;
case IT_S_SET_MIDI_MACRO:
if ((sigdata->flags & (IT_WAS_AN_XM | IT_WAS_A_MOD)) ==
(IT_WAS_AN_XM | IT_WAS_A_MOD)) {
channel->inv_loop_speed = effectvalue & 15;
update_invert_loop(channel, channel->playing
? channel->playing->sample
: NULL);
} else
channel->SFmacro = effectvalue & 15;
break;
}
} break;
case IT_SET_SONG_TEMPO: {
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->lastW;
channel->lastW = v;
if (v < 0x10)
sigrenderer->temposlide = -v;
else if (v < 0x20)
sigrenderer->temposlide = v & 15;
else
sigrenderer->tempo = v;
} break;
case IT_FINE_VIBRATO: {
unsigned char speed = entry->effectvalue >> 4;
unsigned char depth = entry->effectvalue & 15;
if (speed == 0)
speed = channel->lastHspeed;
channel->lastHspeed = speed;
if (depth == 0)
depth = channel->lastHdepth;
else {
if (sigdata->flags & IT_OLD_EFFECTS)
depth <<= 1;
channel->lastHdepth = depth;
}
for (i = -1; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (i < 0)
playing = channel->playing;
else {
playing = sigrenderer->playing[i];
if (!playing || playing->channel != channel)
continue;
}
if (playing) {
playing->vibrato_speed = speed;
playing->vibrato_depth = depth;
playing->vibrato_n++;
}
}
} break;
case IT_SET_GLOBAL_VOLUME:
if ((sigdata->flags & IT_WAS_AN_S3M) && (entry->effectvalue > 64))
break;
if (entry->effectvalue <= 128)
sigrenderer->globalvolume = entry->effectvalue;
#ifdef VOLUME_OUT_OF_RANGE_SETS_MAXIMUM
else
sigrenderer->globalvolume = 128;
#endif
break;
case IT_GLOBAL_VOLUME_SLIDE: {
unsigned char v = entry->effectvalue;
if (v == 0)
v = channel->lastW;
channel->lastW = v;
if ((v & 0x0F) == 0) { /* Wx0 */
sigrenderer->globalvolslide =
(sigdata->flags & IT_WAS_AN_XM) ? (v >> 4) * 2 : (v >> 4);
} else if ((v & 0xF0) == 0) { /* W0x */
sigrenderer->globalvolslide =
(sigdata->flags & IT_WAS_AN_XM) ? (-v) * 2 : (-v);
} else if ((v & 0x0F) == 0x0F) { /* WxF */
sigrenderer->globalvolume += v >> 4;
if (sigrenderer->globalvolume > 128)
sigrenderer->globalvolume = 128;
} else if ((v & 0xF0) == 0xF0) { /* WFx */
sigrenderer->globalvolume -= v & 15;
if (sigrenderer->globalvolume > 128)
sigrenderer->globalvolume = 0;
}
} break;
case IT_SET_PANNING:
if (sigdata->flags & IT_WAS_AN_XM) {
channel->truepan = 32 + entry->effectvalue * 64;
} else {
if (sigdata->flags & IT_WAS_AN_S3M)
channel->pan = (entry->effectvalue + 1) >> 1;
else
channel->pan = (entry->effectvalue + 2) >> 2;
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
}
if (channel->playing)
channel->playing->panbrello_depth = 0;
break;
case IT_PANBRELLO: {
unsigned char speed = entry->effectvalue >> 4;
unsigned char depth = entry->effectvalue & 15;
if (speed == 0)
speed = channel->lastYspeed;
channel->lastYspeed = speed;
if (depth == 0)
depth = channel->lastYdepth;
channel->lastYdepth = depth;
if (channel->playing) {
channel->playing->panbrello_speed = speed;
channel->playing->panbrello_depth = depth;
}
} break;
case IT_MIDI_MACRO: {
const IT_MIDI *midi = sigdata->midi ? sigdata->midi : &default_midi;
if (entry->effectvalue >= 0x80) {
int n = midi->Zmacrolen[entry->effectvalue - 0x80];
int i;
for (i = 0; i < n; i++)
it_send_midi(sigrenderer, channel,
midi->Zmacro[entry->effectvalue - 0x80][i]);
} else {
int n = midi->SFmacrolen[channel->SFmacro];
int i, j;
for (i = 0, j = 1; i < n; i++, j <<= 1)
it_send_midi(
sigrenderer, channel,
(unsigned char)(midi->SFmacroz[channel->SFmacro] & j
? entry->effectvalue
: midi->SFmacro[channel->SFmacro]
[i]));
}
} break;
case IT_XM_SET_ENVELOPE_POSITION:
if (channel->playing && channel->playing->env_instrument) {
IT_ENVELOPE *envelope =
&channel->playing->env_instrument->volume_envelope;
if (envelope->flags & IT_ENVELOPE_ON) {
IT_PLAYING_ENVELOPE *pe =
&channel->playing->volume_envelope;
pe->tick = entry->effectvalue;
if (pe->tick >= envelope->node_t[envelope->n_nodes - 1])
pe->tick = envelope->node_t[envelope->n_nodes - 1];
pe->next_node = 0;
while (pe->tick > envelope->node_t[pe->next_node])
pe->next_node++;
xm_envelope_calculate_value(envelope, pe);
}
}
break;
/* uggly plain portamento for now */
case IT_PTM_NOTE_SLIDE_DOWN:
case IT_PTM_NOTE_SLIDE_DOWN_RETRIG: {
channel->toneslide_retrig =
(entry->effect == IT_PTM_NOTE_SLIDE_DOWN_RETRIG);
if (channel->ptm_last_toneslide) {
channel->toneslide_tick = channel->last_toneslide_tick;
if (--channel->toneslide_tick == 0) {
channel->truenote += channel->toneslide;
if (channel->truenote >= 120) {
if (channel->toneslide < 0)
channel->truenote = 0;
else
channel->truenote = 119;
}
channel->note += channel->toneslide;
if (channel->note >= 120) {
if (channel->toneslide < 0)
channel->note = 0;
else
channel->note = 119;
}
if (channel->playing) {
if (channel->sample)
channel->playing->note = channel->truenote;
else
channel->playing->note = channel->note;
it_playing_reset_resamplers(channel->playing, 0);
channel->playing->declick_stage = 0;
}
}
}
channel->ptm_last_toneslide = 0;
channel->toneslide = -(entry->effectvalue & 15);
channel->ptm_toneslide = (entry->effectvalue & 0xF0) >> 4;
channel->toneslide_tick += channel->ptm_toneslide;
} break;
case IT_PTM_NOTE_SLIDE_UP:
case IT_PTM_NOTE_SLIDE_UP_RETRIG: {
channel->toneslide_retrig =
(entry->effect == IT_PTM_NOTE_SLIDE_UP_RETRIG);
if (channel->ptm_last_toneslide) {
channel->toneslide_tick = channel->last_toneslide_tick;
if (--channel->toneslide_tick == 0) {
channel->truenote += channel->toneslide;
if (channel->truenote >= 120) {
if (channel->toneslide < 0)
channel->truenote = 0;
else
channel->truenote = 119;
}
channel->note += channel->toneslide;
if (channel->note >= 120) {
if (channel->toneslide < 0)
channel->note = 0;
else
channel->note = 119;
}
if (channel->playing) {
if (channel->sample)
channel->playing->note = channel->truenote;
else
channel->playing->note = channel->note;
it_playing_reset_resamplers(channel->playing, 0);
channel->playing->declick_stage = 0;
}
}
}
channel->ptm_last_toneslide = 0;
channel->toneslide = -(entry->effectvalue & 15);
channel->ptm_toneslide = (entry->effectvalue & 0xF0) >> 4;
channel->toneslide_tick += channel->ptm_toneslide;
} break;
case IT_OKT_NOTE_SLIDE_DOWN:
case IT_OKT_NOTE_SLIDE_DOWN_ROW:
channel->toneslide = -entry->effectvalue;
channel->okt_toneslide =
(entry->effect == IT_OKT_NOTE_SLIDE_DOWN) ? 255 : 1;
break;
case IT_OKT_NOTE_SLIDE_UP:
case IT_OKT_NOTE_SLIDE_UP_ROW:
channel->toneslide = entry->effectvalue;
channel->okt_toneslide =
(entry->effect == IT_OKT_NOTE_SLIDE_UP) ? 255 : 1;
break;
case IT_OKT_ARPEGGIO_3:
case IT_OKT_ARPEGGIO_4:
case IT_OKT_ARPEGGIO_5: {
channel->arpeggio_offsets[0] = 0;
channel->arpeggio_offsets[1] = -(entry->effectvalue >> 4);
channel->arpeggio_offsets[2] = entry->effectvalue & 0x0F;
switch (entry->effect) {
case IT_OKT_ARPEGGIO_3:
channel->arpeggio_table =
(const unsigned char *)&arpeggio_okt_3;
break;
case IT_OKT_ARPEGGIO_4:
channel->arpeggio_table =
(const unsigned char *)&arpeggio_okt_4;
break;
case IT_OKT_ARPEGGIO_5:
channel->arpeggio_table =
(const unsigned char *)&arpeggio_okt_5;
break;
}
} break;
case IT_OKT_VOLUME_SLIDE_DOWN:
if (entry->effectvalue <= 16)
channel->volslide = -entry->effectvalue;
else {
channel->volume -= entry->effectvalue - 16;
if (channel->volume > 64)
channel->volume = 0;
}
break;
case IT_OKT_VOLUME_SLIDE_UP:
if (entry->effectvalue <= 16)
channel->volslide = entry->effectvalue;
else {
channel->volume += entry->effectvalue - 16;
if (channel->volume > 64)
channel->volume = 64;
}
break;
}
}
if (!(sigdata->flags & IT_WAS_AN_XM))
post_process_it_volpan(sigrenderer, entry);
return 0;
}
static int process_it_note_data(DUMB_IT_SIGRENDERER *sigrenderer,
IT_ENTRY *entry) {
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
// When tone portamento and instrument are specified:
// If Gxx is off:
// - same sample, do nothing but portamento
// - diff sample, retrigger all but keep current note+slide + do porta
// - if instrument is invalid, nothing; if sample is invalid, cut
// If Gxx is on:
// - same sample or new sample invalid, retrigger envelopes and initialise
// note value for portamento to 'seek' to
// - diff sample/inst, start using new envelopes
// When tone portamento is specified alone, sample won't change.
// TODO: consider what happens with instrument alone after all this...
if (entry->mask & (IT_ENTRY_NOTE | IT_ENTRY_INSTRUMENT)) {
if (entry->mask & IT_ENTRY_INSTRUMENT)
channel->instrument = entry->instrument;
instrument_to_sample(sigdata, channel);
if (channel->note <= 120) {
if ((sigdata->flags & IT_USE_INSTRUMENTS) && channel->sample == 0)
it_retrigger_note(sigrenderer, channel);
/* Stop the note */ /*return 1;*/
if (entry->mask & IT_ENTRY_INSTRUMENT)
get_default_volpan(sigdata, channel);
} else
it_retrigger_note(sigrenderer, channel); /* Stop the note */
}
/** WARNING: This is not ideal, since channel->playing might not get
* allocated owing to lack of memory... */
if (((entry->mask & IT_ENTRY_VOLPAN) && entry->volpan >= 193 &&
entry->volpan <= 202) ||
((entry->mask & IT_ENTRY_EFFECT) &&
(entry->effect == IT_TONE_PORTAMENTO ||
entry->effect == IT_VOLSLIDE_TONEPORTA))) {
if (channel->playing && (entry->mask & IT_ENTRY_INSTRUMENT)) {
if (sigdata->flags & IT_COMPATIBLE_GXX)
it_compatible_gxx_retrigger(sigdata, channel);
else if ((!(sigdata->flags & IT_USE_INSTRUMENTS) ||
(channel->instrument >= 1 &&
channel->instrument <= sigdata->n_instruments)) &&
channel->sample != channel->playing->sampnum) {
unsigned char note = channel->playing->note;
int slide = channel->playing->slide;
it_retrigger_note(sigrenderer, channel);
if (channel->playing) {
channel->playing->note = note;
channel->playing->slide = slide;
// Should we be preserving sample_vibrato_time? depth?
}
}
}
channel->toneporta = 0;
if ((entry->mask & IT_ENTRY_VOLPAN) && entry->volpan >= 193 &&
entry->volpan <= 202) {
/* Tone Portamento in the volume column */
static const unsigned char slidetable[] = {0, 1, 4, 8, 16,
32, 64, 96, 128, 255};
unsigned char v = slidetable[entry->volpan - 193];
if (sigdata->flags & IT_COMPATIBLE_GXX) {
if (v == 0)
v = channel->lastG;
channel->lastG = v;
} else {
if (v == 0)
v = channel->lastEF;
channel->lastEF = v;
}
channel->toneporta += v << 4;
}
if ((entry->mask & IT_ENTRY_EFFECT) &&
(entry->effect == IT_TONE_PORTAMENTO ||
entry->effect == IT_VOLSLIDE_TONEPORTA)) {
/* Tone Portamento in the effect column */
unsigned char v;
if (entry->effect == IT_TONE_PORTAMENTO)
v = entry->effectvalue;
else
v = 0;
if (sigdata->flags & IT_COMPATIBLE_GXX) {
if (v == 0)
v = channel->lastG;
channel->lastG = v;
} else {
if (v == 0 && !(sigdata->flags & IT_WAS_A_669))
v = channel->lastEF;
channel->lastEF = v;
}
channel->toneporta += v << 4;
}
if ((entry->mask & IT_ENTRY_NOTE) ||
((sigdata->flags & IT_COMPATIBLE_GXX) &&
(entry->mask & IT_ENTRY_INSTRUMENT))) {
if (channel->note <= 120) {
if (channel->sample)
channel->destnote = channel->truenote;
else
channel->destnote = channel->note;
}
}
if (channel->playing)
goto skip_start_note;
}
if ((entry->mask & IT_ENTRY_NOTE) ||
((entry->mask & IT_ENTRY_INSTRUMENT) &&
(!channel->playing ||
entry->instrument != channel->playing->instnum))) {
if (channel->note <= 120) {
get_true_pan(sigdata, channel);
if ((entry->mask & IT_ENTRY_NOTE) ||
!(sigdata->flags & (IT_WAS_AN_S3M | IT_WAS_A_PTM)))
it_retrigger_note(sigrenderer, channel);
}
}
skip_start_note:
if (entry->mask & IT_ENTRY_VOLPAN) {
if (entry->volpan <= 64) {
/* Volume */
channel->volume = entry->volpan;
} else if (entry->volpan <= 74) {
/* Fine volume slide up */
unsigned char v = entry->volpan - 65;
if (v == 0)
v = channel->lastvolslide;
channel->lastvolslide = v;
/* = effect DxF where x == entry->volpan - 65 */
channel->volume += v;
if (channel->volume > 64)
channel->volume = 64;
} else if (entry->volpan <= 84) {
/* Fine volume slide down */
unsigned char v = entry->volpan - 75;
if (v == 0)
v = channel->lastvolslide;
channel->lastvolslide = v;
/* = effect DFx where x == entry->volpan - 75 */
channel->volume -= v;
if (channel->volume > 64)
channel->volume = 0;
} else if (entry->volpan < 128) {
/* Volume slide up */
/* Volume slide down */
/* Portamento down */
/* Portamento up */
} else if (entry->volpan <= 192) {
/* Pan */
channel->pan = entry->volpan - 128;
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
}
/* else */
/* Tone Portamento */
/* Vibrato */
}
return 0;
}
static void retrigger_xm_envelopes(IT_PLAYING *playing) {
playing->volume_envelope.next_node = 0;
playing->volume_envelope.tick = -1;
playing->pan_envelope.next_node = 0;
playing->pan_envelope.tick = -1;
playing->fadeoutcount = 1024;
}
static void process_xm_note_data(DUMB_IT_SIGRENDERER *sigrenderer,
IT_ENTRY *entry) {
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
IT_PLAYING *playing = NULL;
if (entry->mask & IT_ENTRY_INSTRUMENT) {
int oldsample = channel->sample;
channel->inv_loop_offset = 0;
channel->instrument = entry->instrument;
instrument_to_sample(sigdata, channel);
if (channel->playing &&
!((entry->mask & IT_ENTRY_NOTE) && entry->note >= 120) &&
!((entry->mask & IT_ENTRY_EFFECT) &&
entry->effect == IT_XM_KEY_OFF && entry->effectvalue == 0)) {
playing = dup_playing(channel->playing, channel, channel);
if (!playing)
return;
if (!(sigdata->flags & IT_WAS_A_MOD)) {
/* Retrigger vol/pan envelopes if enabled, and cancel fadeout.
* Also reset vol/pan to that of _original_ instrument.
*/
channel->playing->flags &=
~(IT_PLAYING_SUSTAINOFF | IT_PLAYING_FADING);
it_playing_update_resamplers(channel->playing);
channel->volume = channel->playing->sample->default_volume;
channel->truepan =
32 + channel->playing->sample->default_pan * 64;
retrigger_xm_envelopes(channel->playing);
} else {
/* Switch if sample changed */
if (oldsample != channel->sample) {
int i;
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (!sigrenderer->playing[i]) {
channel->playing->declick_stage = 3;
sigrenderer->playing[i] = channel->playing;
channel->playing = NULL;
break;
}
}
if (!channel->sample) {
if (channel->playing) {
free_playing(channel->playing);
channel->playing = NULL;
}
} else {
if (channel->playing) {
free_playing(channel->playing);
}
channel->playing = playing;
playing = NULL;
channel->playing->declick_stage = 0;
channel->playing->sampnum = channel->sample;
channel->playing->sample =
&sigdata->sample[channel->sample - 1];
it_playing_reset_resamplers(channel->playing, 0);
}
}
get_default_volpan(sigdata, channel);
}
}
}
if (!((entry->mask & IT_ENTRY_EFFECT) && entry->effect == IT_XM_KEY_OFF &&
entry->effectvalue == 0) &&
(entry->mask & IT_ENTRY_NOTE)) {
if (!(entry->mask & IT_ENTRY_INSTRUMENT))
instrument_to_sample(sigdata, channel);
if (channel->note >= 120)
xm_note_off(sigdata, channel);
else if (channel->sample == 0) {
/** If we get here, one of the following is the case:
** 1. The instrument has never been specified on this channel.
** 2. The specified instrument is invalid.
** 3. The instrument has no sample mapped to the selected note.
** What should happen?
**
** Experimentation shows that any existing note stops and cannot
** be brought back. A subsequent instrument change fixes that.
**/
if (channel->playing) {
int i;
if (playing) {
free_playing(channel->playing);
channel->playing = playing;
playing = NULL;
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (!sigrenderer->playing[i]) {
channel->playing->declick_stage = 3;
sigrenderer->playing[i] = channel->playing;
channel->playing = NULL;
break;
}
}
if (channel->playing) {
free_playing(channel->playing);
channel->playing = NULL;
}
}
if (playing)
free_playing(playing);
return;
} else if (channel->playing && (entry->mask & IT_ENTRY_VOLPAN) &&
((entry->volpan >> 4) == 0xF)) {
/* Don't retrigger note; portamento in the volume column. */
} else if (channel->playing && (entry->mask & IT_ENTRY_EFFECT) &&
(entry->effect == IT_TONE_PORTAMENTO ||
entry->effect == IT_VOLSLIDE_TONEPORTA)) {
/* Don't retrigger note; portamento in the effects column. */
} else {
channel->destnote = IT_NOTE_OFF;
if (!channel->playing) {
channel->playing = new_playing();
if (!channel->playing) {
if (playing)
free_playing(playing);
return;
}
// Adding the following seems to do the trick for the case where
// a piece starts with an instrument alone and then some notes
// alone.
retrigger_xm_envelopes(channel->playing);
} else if (playing) {
/* volume rampy stuff! move note to NNA */
int i;
IT_PLAYING *ptemp;
if (playing->sample)
ptemp = playing;
else
ptemp = channel->playing;
if (!ptemp) {
if (playing)
free_playing(playing);
return;
}
playing = NULL;
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (!sigrenderer->playing[i]) {
ptemp->declick_stage = 3;
ptemp->flags |=
IT_PLAYING_SUSTAINOFF | IT_PLAYING_FADING;
sigrenderer->playing[i] = ptemp;
ptemp = NULL;
break;
}
}
if (ptemp)
free_playing(ptemp);
}
channel->playing->flags = 0;
channel->playing->resampling_quality =
sigrenderer->resampling_quality;
channel->playing->channel = channel;
channel->playing->sample = &sigdata->sample[channel->sample - 1];
if (sigdata->flags & IT_USE_INSTRUMENTS)
channel->playing->instrument =
&sigdata->instrument[channel->instrument - 1];
else
channel->playing->instrument = NULL;
channel->playing->env_instrument = channel->playing->instrument;
channel->playing->sampnum = channel->sample;
channel->playing->instnum = channel->instrument;
channel->playing->declick_stage = 0;
channel->playing->channel_volume = channel->channelvolume;
channel->playing->note = channel->truenote;
channel->playing->enabled_envelopes = 0;
channel->playing->volume_offset = 0;
channel->playing->panning_offset = 0;
// channel->playing->output = channel->output;
if (sigdata->flags & IT_USE_INSTRUMENTS) {
IT_PLAYING *playing = channel->playing;
IT_INSTRUMENT *instrument = playing->instrument;
if (instrument->volume_envelope.flags & IT_ENVELOPE_ON)
playing->enabled_envelopes |= IT_ENV_VOLUME;
if (instrument->pan_envelope.flags & IT_ENVELOPE_ON)
playing->enabled_envelopes |= IT_ENV_PANNING;
// if (instrument->output) playing->output = instrument->output;
}
channel->playing->filter_cutoff = 127;
channel->playing->filter_resonance = 0;
channel->playing->true_filter_cutoff = 127 << 8;
channel->playing->true_filter_resonance = 0;
channel->playing->vibrato_speed = 0;
channel->playing->vibrato_depth = 0;
channel->playing->vibrato_n = 0;
channel->playing->vibrato_time = 0;
channel->playing->vibrato_waveform = 0;
channel->playing->tremolo_speed = 0;
channel->playing->tremolo_depth = 0;
channel->playing->tremolo_time = 0;
channel->playing->tremolo_waveform = 0;
channel->playing->panbrello_speed = 0;
channel->playing->panbrello_depth = 0;
channel->playing->panbrello_time = 0;
channel->playing->panbrello_waveform = 0;
channel->playing->panbrello_random = 0;
channel->playing->sample_vibrato_time = 0;
channel->playing->sample_vibrato_waveform =
channel->playing->sample->vibrato_waveform;
channel->playing->sample_vibrato_depth = 0;
channel->playing->slide = 0;
channel->playing->finetune = channel->playing->sample->finetune;
it_reset_filter_state(
&channel->playing->filter_state[0]); // Are these
it_reset_filter_state(
&channel->playing->filter_state[1]); // necessary?
it_playing_reset_resamplers(channel->playing, 0);
/** WARNING - is everything initialised? */
}
}
if (!((entry->mask & IT_ENTRY_EFFECT) && entry->effect == IT_XM_KEY_OFF &&
entry->effectvalue == 0) &&
!((entry->mask & IT_ENTRY_NOTE) && entry->note >= 120) &&
(entry->mask & (IT_ENTRY_NOTE | IT_ENTRY_INSTRUMENT)) ==
(IT_ENTRY_NOTE | IT_ENTRY_INSTRUMENT)) {
if (channel->playing)
retrigger_xm_envelopes(channel->playing);
get_default_volpan(sigdata, channel);
}
if ((entry->mask & IT_ENTRY_VOLPAN) && ((entry->volpan >> 4) == 0xF)) {
/* Tone Portamento */
unsigned char v = (entry->volpan & 15) << 4;
if (v == 0)
v = channel->lastG;
channel->lastG = v;
if (entry->mask & IT_ENTRY_NOTE)
if (channel->sample && channel->note < 120)
channel->destnote = channel->truenote;
channel->toneporta = v << 4;
} else if ((entry->mask & IT_ENTRY_EFFECT) &&
(entry->effect == IT_TONE_PORTAMENTO ||
entry->effect == IT_VOLSLIDE_TONEPORTA)) {
unsigned char v;
if (entry->effect == IT_TONE_PORTAMENTO)
v = entry->effectvalue;
else
v = 0;
if (v == 0)
v = channel->lastG;
channel->lastG = v;
if (entry->mask & IT_ENTRY_NOTE)
if (channel->sample && channel->note < 120)
channel->destnote = channel->truenote;
channel->toneporta = v << 4;
}
if (entry->mask & IT_ENTRY_VOLPAN) {
int effect = entry->volpan >> 4;
int value = entry->volpan & 15;
switch (effect) {
case 0x6: /* Volume slide down */
channel->xm_volslide = -value;
break;
case 0x7: /* Volume slide up */
channel->xm_volslide = value;
break;
case 0x8: /* Fine volume slide down */
channel->volume -= value;
if (channel->volume > 64)
channel->volume = 0;
break;
case 0x9: /* Fine volume slide up */
channel->volume += value;
if (channel->volume > 64)
channel->volume = 64;
break;
case 0xA: /* Set vibrato speed */
if (value)
channel->lastHspeed = value;
if (channel->playing)
channel->playing->vibrato_speed = channel->lastHspeed;
break;
case 0xB: /* Vibrato */
if (value)
channel->lastHdepth = value << 2; /** WARNING: correct ? */
if (channel->playing) {
channel->playing->vibrato_depth = channel->lastHdepth;
channel->playing->vibrato_speed = channel->lastHspeed;
channel->playing->vibrato_n++;
}
break;
case 0xC: /* Set panning */
channel->truepan = 32 + value * (17 * 64);
break;
case 0xD: /* Pan slide left */
/* -128 is a special case for emulating a 'feature' in FT2.
* As soon as effects are processed, it goes hard left.
*/
channel->panslide = value ? -value : -128;
break;
case 0xE: /* Pan slide Right */
channel->panslide = value;
break;
case 0xF: /* Tone porta */
break;
default: /* Volume */
channel->volume = entry->volpan - 0x10;
break;
}
}
if (playing)
free_playing(playing);
}
/* This function assumes !IT_IS_END_ROW(entry). */
static int process_note_data(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry,
int ignore_cxx) {
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
if (sigdata->flags & IT_WAS_AN_XM)
process_xm_note_data(sigrenderer, entry);
else if (process_it_note_data(sigrenderer, entry))
return 0;
return process_effects(sigrenderer, entry, ignore_cxx);
}
static int process_entry(DUMB_IT_SIGRENDERER *sigrenderer, IT_ENTRY *entry,
int ignore_cxx) {
IT_CHANNEL *channel = &sigrenderer->channel[(int)entry->channel];
if (entry->mask & IT_ENTRY_NOTE)
channel->note = entry->note;
if ((entry->mask & (IT_ENTRY_NOTE | IT_ENTRY_EFFECT)) &&
(sigrenderer->sigdata->flags & IT_WAS_A_669)) {
reset_channel_effects(channel);
// XXX unknown
if (channel->playing)
channel->playing->finetune = 0;
}
if ((entry->mask & IT_ENTRY_EFFECT) && entry->effect == IT_S) {
/* channel->lastS was set in update_pattern_variables(). */
unsigned char effectvalue = channel->lastS;
if (effectvalue >> 4 == IT_S_NOTE_DELAY) {
channel->note_delay_count = effectvalue & 15;
if (channel->note_delay_count == 0)
channel->note_delay_count = 1;
channel->note_delay_entry = entry;
return 0;
}
}
return process_note_data(sigrenderer, entry, ignore_cxx);
}
static void update_tick_counts(DUMB_IT_SIGRENDERER *sigrenderer) {
int i;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
if (channel->key_off_count) {
channel->key_off_count--;
if (channel->key_off_count == 0)
xm_note_off(sigrenderer->sigdata, channel);
} else if (channel->note_cut_count) {
channel->note_cut_count--;
if (channel->note_cut_count == 0) {
if (sigrenderer->sigdata->flags & (IT_WAS_AN_XM | IT_WAS_A_PTM))
channel->volume = 0;
else if (channel->playing) {
int i;
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (!sigrenderer->playing[i]) {
channel->playing->declick_stage = 3;
sigrenderer->playing[i] = channel->playing;
channel->playing = NULL;
break;
}
}
if (channel->playing) {
free_playing(channel->playing);
channel->playing = NULL;
}
}
}
} else if (channel->note_delay_count && channel->note_delay_entry) {
channel->note_delay_count--;
if (channel->note_delay_count == 0)
process_note_data(sigrenderer, channel->note_delay_entry, 0);
/* Don't bother checking the return value; if the note
* was delayed, there can't have been a speed=0.
*/
}
}
}
static int envelope_get_y(IT_ENVELOPE *envelope, IT_PLAYING_ENVELOPE *pe) {
#if 1
(void)envelope; // TODO: remove the parameter
return pe->value;
#else
int ys, ye;
int ts, te;
int t;
if (pe->next_node <= 0)
return envelope->node_y[0] << IT_ENVELOPE_SHIFT;
if (pe->next_node >= envelope->n_nodes)
return envelope->node_y[envelope->n_nodes - 1] << IT_ENVELOPE_SHIFT;
ys = envelope->node_y[pe->next_node - 1] << IT_ENVELOPE_SHIFT;
ts = envelope->node_t[pe->next_node - 1];
te = envelope->node_t[pe->next_node];
if (ts == te)
return ys;
ye = envelope->node_y[pe->next_node] << IT_ENVELOPE_SHIFT;
t = pe->tick;
return ys + (ye - ys) * (t - ts) / (te - ts);
#endif
}
#if 0
static int it_envelope_end(IT_PLAYING *playing, IT_ENVELOPE *envelope, IT_PLAYING_ENVELOPE *pe)
{
if (pe->next_node >= envelope->n_nodes)
return 1;
if (pe->tick < envelope->node_t[pe->next_node]) return 0;
if ((envelope->flags & IT_ENVELOPE_LOOP_ON) &&
envelope->loop_end >= pe->next_node &&
envelope->node_t[envelope->loop_end] <= pe->tick) return 0;
if ((envelope->flags & IT_ENVELOPE_SUSTAIN_LOOP) &&
!(playing->flags & IT_PLAYING_SUSTAINOFF) &&
envelope->sus_loop_end >= pe->next_node &&
envelope->node_t[envelope->sus_loop_end] <= pe->tick) return 0;
if (envelope->node_t[envelope->n_nodes-1] <= pe->tick) return 1;
return 0;
}
#endif
/* Returns 1 when fading should be initiated for a volume envelope. */
static int update_it_envelope(IT_PLAYING *playing, IT_ENVELOPE *envelope,
IT_PLAYING_ENVELOPE *pe, int flags) {
if (!(playing->enabled_envelopes & flags) || !envelope->n_nodes)
return 0;
ASSERT(envelope->n_nodes > 0);
if (pe->tick <= 0)
pe->value = envelope->node_y[0] << IT_ENVELOPE_SHIFT;
else if (pe->tick >= envelope->node_t[envelope->n_nodes - 1]) {
pe->value = envelope->node_y[envelope->n_nodes - 1]
<< IT_ENVELOPE_SHIFT;
} else {
int ys = envelope->node_y[pe->next_node - 1] << IT_ENVELOPE_SHIFT;
int ts = envelope->node_t[pe->next_node - 1];
int te = envelope->node_t[pe->next_node];
if (ts == te)
pe->value = ys;
else {
int ye = envelope->node_y[pe->next_node] << IT_ENVELOPE_SHIFT;
int t = pe->tick;
pe->value = ys + (ye - ys) * (t - ts) / (te - ts);
}
}
pe->tick++;
recalculate_it_envelope_node(pe, envelope);
if ((envelope->flags & IT_ENVELOPE_SUSTAIN_LOOP) &&
!(playing->flags & IT_PLAYING_SUSTAINOFF)) {
if (pe->tick > envelope->node_t[envelope->sus_loop_end]) {
pe->next_node = envelope->sus_loop_start + 1;
ASSERT(pe->next_node <= envelope->n_nodes);
pe->tick = envelope->node_t[envelope->sus_loop_start];
return 0;
}
} else if (envelope->flags & IT_ENVELOPE_LOOP_ON) {
if (pe->tick > envelope->node_t[envelope->loop_end]) {
pe->next_node = envelope->loop_start + 1;
ASSERT(pe->next_node <= envelope->n_nodes);
pe->tick = envelope->node_t[envelope->loop_start];
return 0;
}
} else if (pe->tick > envelope->node_t[envelope->n_nodes - 1])
return 1;
return 0;
}
static void update_it_envelopes(IT_PLAYING *playing) {
IT_ENVELOPE *envelope = &playing->env_instrument->volume_envelope;
IT_PLAYING_ENVELOPE *pe = &playing->volume_envelope;
if (update_it_envelope(playing, envelope, pe, IT_ENV_VOLUME)) {
playing->flags |= IT_PLAYING_FADING;
if (pe->value == 0)
playing->flags |= IT_PLAYING_DEAD;
}
update_it_envelope(playing, &playing->env_instrument->pan_envelope,
&playing->pan_envelope, IT_ENV_PANNING);
update_it_envelope(playing, &playing->env_instrument->pitch_envelope,
&playing->pitch_envelope, IT_ENV_PITCH);
}
static int xm_envelope_is_sustaining(IT_PLAYING *playing, IT_ENVELOPE *envelope,
IT_PLAYING_ENVELOPE *pe) {
if ((envelope->flags & IT_ENVELOPE_SUSTAIN_LOOP) &&
!(playing->flags & IT_PLAYING_SUSTAINOFF))
if (envelope->sus_loop_start < envelope->n_nodes)
if (pe->tick == envelope->node_t[envelope->sus_loop_start])
return 1;
return 0;
}
static void update_xm_envelope(IT_PLAYING *playing, IT_ENVELOPE *envelope,
IT_PLAYING_ENVELOPE *pe) {
if (!(envelope->flags & IT_ENVELOPE_ON))
return;
if (xm_envelope_is_sustaining(playing, envelope, pe))
return;
if (pe->tick >= envelope->node_t[envelope->n_nodes - 1])
return;
pe->tick++;
/* pe->next_node must be kept up to date for envelope_get_y(). */
while (pe->tick > envelope->node_t[pe->next_node])
pe->next_node++;
if ((envelope->flags & IT_ENVELOPE_LOOP_ON) &&
envelope->loop_end < envelope->n_nodes) {
if (pe->tick == envelope->node_t[envelope->loop_end]) {
pe->next_node = MID(0, envelope->loop_start, envelope->n_nodes - 1);
pe->tick = envelope->node_t[pe->next_node];
}
}
xm_envelope_calculate_value(envelope, pe);
}
static void update_xm_envelopes(IT_PLAYING *playing) {
update_xm_envelope(playing, &playing->env_instrument->volume_envelope,
&playing->volume_envelope);
update_xm_envelope(playing, &playing->env_instrument->pan_envelope,
&playing->pan_envelope);
}
static void update_fadeout(DUMB_IT_SIGDATA *sigdata, IT_PLAYING *playing) {
if (playing->flags & IT_PLAYING_FADING) {
playing->fadeoutcount -= playing->env_instrument->fadeout;
if (playing->fadeoutcount <= 0) {
playing->fadeoutcount = 0;
if (!(sigdata->flags & IT_WAS_AN_XM))
playing->flags |= IT_PLAYING_DEAD;
}
}
}
static int apply_pan_envelope(IT_PLAYING *playing);
static float calculate_volume(DUMB_IT_SIGRENDERER *sigrenderer,
IT_PLAYING *playing, float volume);
static void playing_volume_setup(DUMB_IT_SIGRENDERER *sigrenderer,
IT_PLAYING *playing, float invt2g) {
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
int pan;
float vol, span;
float rampScale;
int ramp_style = sigrenderer->ramp_style;
pan = apply_pan_envelope(playing);
if ((sigrenderer->n_channels >= 2) && (sigdata->flags & IT_STEREO) &&
(sigrenderer->n_channels != 3 || !IT_IS_SURROUND_SHIFTED(pan))) {
if (!IT_IS_SURROUND_SHIFTED(pan)) {
span = (pan - (32 << 8)) * sigdata->pan_separation *
(1.0f / ((32 << 8) * 128));
vol = 0.5f * (1.0f - span);
playing->float_volume[0] = vol;
playing->float_volume[1] = 1.0f - vol;
} else {
playing->float_volume[0] = -0.5f;
playing->float_volume[1] = 0.5f;
}
} else {
playing->float_volume[0] = 1.0f;
playing->float_volume[1] = 1.0f;
}
vol = calculate_volume(sigrenderer, playing, 1.0f);
playing->float_volume[0] *= vol;
playing->float_volume[1] *= vol;
rampScale = 4;
if (ramp_style > 0 && playing->declick_stage == 2) {
if ((playing->ramp_volume[0] == 0 && playing->ramp_volume[1] == 0) ||
vol == 0)
rampScale = 48;
}
if (ramp_style == 0 || (ramp_style < 2 && playing->declick_stage == 2)) {
if (playing->declick_stage <= 2) {
playing->ramp_volume[0] = playing->float_volume[0];
playing->ramp_volume[1] = playing->float_volume[1];
playing->declick_stage = 2;
} else {
playing->float_volume[0] = 0;
playing->float_volume[1] = 0;
playing->ramp_volume[0] = 0;
playing->ramp_volume[1] = 0;
playing->declick_stage = 5;
}
playing->ramp_delta[0] = 0;
playing->ramp_delta[1] = 0;
} else {
if (playing->declick_stage == 0) {
playing->ramp_volume[0] = 0;
playing->ramp_volume[1] = 0;
rampScale = 48;
playing->declick_stage++;
} else if (playing->declick_stage == 1) {
rampScale = 48;
} else if (playing->declick_stage >= 3) {
playing->float_volume[0] = 0;
playing->float_volume[1] = 0;
if (playing->declick_stage == 3)
playing->declick_stage++;
rampScale = 48;
}
playing->ramp_delta[0] =
rampScale * invt2g *
(playing->float_volume[0] - playing->ramp_volume[0]);
playing->ramp_delta[1] =
rampScale * invt2g *
(playing->float_volume[1] - playing->ramp_volume[1]);
}
}
static void process_playing(DUMB_IT_SIGRENDERER *sigrenderer,
IT_PLAYING *playing, float invt2g) {
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
if (playing->instrument) {
if (sigdata->flags & IT_WAS_AN_XM)
update_xm_envelopes(playing);
else
update_it_envelopes(playing);
update_fadeout(sigdata, playing);
}
playing_volume_setup(sigrenderer, playing, invt2g);
if (sigdata->flags & IT_WAS_AN_XM) {
/* 'depth' is used to store the tick number for XM files. */
if (playing->sample_vibrato_depth < playing->sample->vibrato_rate)
playing->sample_vibrato_depth++;
} else {
playing->sample_vibrato_depth += playing->sample->vibrato_rate;
if (playing->sample_vibrato_depth > playing->sample->vibrato_depth << 8)
playing->sample_vibrato_depth = playing->sample->vibrato_depth << 8;
}
playing->sample_vibrato_time += playing->sample->vibrato_speed;
}
#if (defined(_MSC_VER) && _MSC_VER < 1800) || defined(__ANDROID__)
static float log2(float x) { return (float)log(x) / (float)log(2.0f); }
#endif
static int delta_to_note(float delta, int base) {
float note;
note = log2(delta * 65536.f / (float)base) * 12.0f + 60.5f;
if (note > 119)
note = 119;
else if (note < 0)
note = 0;
return (int)note;
}
// Period table for Protracker octaves 0-5:
#if 0
static const unsigned short ProTrackerPeriodTable[6*12] =
{
1712,1616,1524,1440,1356,1280,1208,1140,1076,1016,960,907,
856,808,762,720,678,640,604,570,538,508,480,453,
428,404,381,360,339,320,302,285,269,254,240,226,
214,202,190,180,170,160,151,143,135,127,120,113,
107,101,95,90,85,80,75,71,67,63,60,56,
53,50,47,45,42,40,37,35,33,31,30,28
};
static const unsigned short ProTrackerTunedPeriods[16*12] =
{
1712,1616,1524,1440,1356,1280,1208,1140,1076,1016,960,907,
1700,1604,1514,1430,1348,1274,1202,1134,1070,1010,954,900,
1688,1592,1504,1418,1340,1264,1194,1126,1064,1004,948,894,
1676,1582,1492,1408,1330,1256,1184,1118,1056,996,940,888,
1664,1570,1482,1398,1320,1246,1176,1110,1048,990,934,882,
1652,1558,1472,1388,1310,1238,1168,1102,1040,982,926,874,
1640,1548,1460,1378,1302,1228,1160,1094,1032,974,920,868,
1628,1536,1450,1368,1292,1220,1150,1086,1026,968,914,862,
1814,1712,1616,1524,1440,1356,1280,1208,1140,1076,1016,960,
1800,1700,1604,1514,1430,1350,1272,1202,1134,1070,1010,954,
1788,1688,1592,1504,1418,1340,1264,1194,1126,1064,1004,948,
1774,1676,1582,1492,1408,1330,1256,1184,1118,1056,996,940,
1762,1664,1570,1482,1398,1320,1246,1176,1110,1048,988,934,
1750,1652,1558,1472,1388,1310,1238,1168,1102,1040,982,926,
1736,1640,1548,1460,1378,1302,1228,1160,1094,1032,974,920,
1724,1628,1536,1450,1368,1292,1220,1150,1086,1026,968,914
};
#endif
static void process_all_playing(DUMB_IT_SIGRENDERER *sigrenderer) {
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
int i;
float invt2g =
1.0f / ((float)TICK_TIME_DIVIDEND / (float)sigrenderer->tempo / 256.0f);
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
IT_PLAYING *playing = channel->playing;
if (playing) {
int vibrato_shift;
switch (playing->vibrato_waveform) {
default:
vibrato_shift = it_sine[playing->vibrato_time];
break;
case 1:
vibrato_shift = it_sawtooth[playing->vibrato_time];
break;
case 2:
vibrato_shift = it_squarewave[playing->vibrato_time];
break;
case 3:
vibrato_shift = (rand() % 129) - 64;
break;
case 4:
vibrato_shift = it_xm_squarewave[playing->vibrato_time];
break;
case 5:
vibrato_shift = it_xm_ramp[playing->vibrato_time];
break;
case 6:
vibrato_shift = it_xm_ramp[255 - playing->vibrato_time];
break;
}
vibrato_shift *= playing->vibrato_n;
vibrato_shift *= playing->vibrato_depth;
vibrato_shift >>= 4;
if (sigdata->flags & IT_OLD_EFFECTS)
vibrato_shift = -vibrato_shift;
playing->volume = channel->volume;
playing->pan = channel->truepan;
if (playing->volume_offset) {
playing->volume +=
(playing->volume_offset * playing->volume) >> 7;
if (playing->volume > 64) {
if (playing->volume_offset < 0)
playing->volume = 0;
else
playing->volume = 64;
}
}
if (playing->panning_offset &&
!IT_IS_SURROUND_SHIFTED(playing->pan)) {
playing->pan += playing->panning_offset << IT_ENVELOPE_SHIFT;
if (playing->pan > 64 << IT_ENVELOPE_SHIFT) {
if (playing->panning_offset < 0)
playing->pan = 0;
else
playing->pan = 64 << IT_ENVELOPE_SHIFT;
}
}
if (sigdata->flags & IT_LINEAR_SLIDES) {
int currpitch = ((playing->note - 60) << 8) + playing->slide +
vibrato_shift + playing->finetune;
/* We add a feature here, which is that of keeping the pitch
* within range. Otherwise it crashes. Trust me. It happened.
* The limit 32768 gives almost 11 octaves either way.
*/
if (currpitch < -32768)
currpitch = -32768;
else if (currpitch > 32767)
currpitch = 32767;
playing->delta = (float)pow(DUMB_PITCH_BASE, currpitch);
playing->delta *= playing->sample->C5_speed * (1.f / 65536.0f);
} else {
int slide = playing->slide + vibrato_shift;
playing->delta =
(float)pow(DUMB_PITCH_BASE,
((60 - playing->note) << 8) - playing->finetune);
/* playing->delta is 1.0 for C-5, 0.5 for C-6, etc. */
playing->delta *= 1.0f / playing->sample->C5_speed;
playing->delta -= slide / AMIGA_DIVISOR;
if (playing->delta < (1.0f / 65536.0f) / 32768.0f) {
// Should XM notes die if Amiga slides go out of range?
playing->flags |= IT_PLAYING_DEAD;
playing->delta = 1. / 32768.;
continue;
}
playing->delta = (1.0f / 65536.0f) / playing->delta;
}
if (playing->channel->glissando && playing->channel->toneporta &&
playing->channel->destnote < 120) {
playing->delta =
(float)pow(DUMB_SEMITONE_BASE,
delta_to_note(playing->delta,
(int)playing->sample->C5_speed) -
60) *
playing->sample->C5_speed * (1.f / 65536.f);
}
/*
if ( channel->arpeggio ) { // another FT2 bug...
if ((sigdata->flags &
(IT_LINEAR_SLIDES|IT_WAS_AN_XM|IT_WAS_A_MOD)) ==
(IT_WAS_AN_XM|IT_LINEAR_SLIDES) && playing->flags &
IT_PLAYING_SUSTAINOFF)
{
if ( channel->arpeggio > 0xFF )
playing->delta = playing->sample->C5_speed *
(1.f / 65536.f);
}
else*/
{
int tick = sigrenderer->tick - 1;
if ((sigrenderer->sigdata->flags &
(IT_WAS_AN_XM | IT_WAS_A_MOD)) != IT_WAS_AN_XM)
tick = sigrenderer->speed - tick - 1;
else if (tick == sigrenderer->speed - 1)
tick = 0;
else
++tick;
if (sigrenderer->sigdata->flags & IT_WAS_AN_STM)
tick /= 16;
playing->delta *= (float)pow(
DUMB_SEMITONE_BASE,
channel
->arpeggio_offsets[channel->arpeggio_table[tick & 31]]);
}
/*
}*/
playing->filter_cutoff = channel->filter_cutoff;
playing->filter_resonance = channel->filter_resonance;
}
}
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing) {
process_playing(sigrenderer, sigrenderer->channel[i].playing,
invt2g);
if (!(sigdata->flags & IT_WAS_AN_XM)) {
// if ((sigrenderer->channel[i].playing->flags &
// (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) ==
// (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) {
// This change was made so Gxx would work correctly when a note
// faded out or whatever. Let's hope nothing else was broken by
// it.
if (sigrenderer->channel[i].playing->flags & IT_PLAYING_DEAD) {
free_playing(sigrenderer->channel[i].playing);
sigrenderer->channel[i].playing = NULL;
}
}
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer->playing[i]) {
process_playing(sigrenderer, sigrenderer->playing[i], invt2g);
if (sigrenderer->playing[i]->flags & IT_PLAYING_DEAD) {
free_playing(sigrenderer->playing[i]);
sigrenderer->playing[i] = NULL;
}
}
}
}
static int process_tick(DUMB_IT_SIGRENDERER *sigrenderer) {
DUMB_IT_SIGDATA *sigdata = sigrenderer->sigdata;
if (sigrenderer->tempo < 32 || sigrenderer->tempo > 255) // problematic
return 1;
// Set note vol/freq to vol/freq set for each channel
if (sigrenderer->speed && --sigrenderer->tick == 0) {
reset_tick_counts(sigrenderer);
sigrenderer->tick = sigrenderer->speed;
sigrenderer->rowcount--;
if (sigrenderer->rowcount == 0) {
sigrenderer->rowcount = 1;
#ifdef BIT_ARRAY_BULLSHIT
if (sigrenderer->n_rows) {
#if 1
/*
if (bit_array_test(sigrenderer->played, sigrenderer->order * 256
+ sigrenderer->row))
{
if (sigrenderer->callbacks->loop) {
if
((*sigrenderer->callbacks->loop)(sigrenderer->callbacks->loop_data))
return 1;
bit_array_reset(sigrenderer->played);
if (sigrenderer->speed == 0)
goto speed0; I love goto
}
}
*/
#endif
bit_array_set(sigrenderer->played,
sigrenderer->order * 256 + sigrenderer->row);
{
int n;
for (n = 0; n < DUMB_IT_N_CHANNELS; n++) {
IT_CHANNEL *channel = &sigrenderer->channel[n];
if (channel->played_patjump) {
if (channel->played_patjump_order ==
sigrenderer->order) {
bit_array_set(channel->played_patjump,
sigrenderer->row);
}
/*
else if ((channel->played_patjump_order & 0x7FFF) ==
sigrenderer->order)
{
channel->played_patjump_order |= 0x4000;
}
else if ((channel->played_patjump_order & 0x3FFF) ==
sigrenderer->order)
{
if ((sigdata->flags &
(IT_WAS_AN_XM|IT_WAS_A_MOD)) == IT_WAS_AN_XM)
{
joy, was XM, pattern loop bug triggered break to row in same order
bit_array_mask(sigrenderer->played,
channel->played_patjump, sigrenderer->order * 256);
}
bit_array_destroy(channel->played_patjump);
channel->played_patjump = 0;
channel->played_patjump_order = 0xFFFE;
}
*/
else {
bit_array_destroy(channel->played_patjump);
channel->played_patjump = 0;
channel->played_patjump_order = 0xFFFE;
}
}
}
}
}
#endif
sigrenderer->processrow++;
if (sigrenderer->processrow >= sigrenderer->n_rows) {
IT_PATTERN *pattern;
int n;
int processorder = sigrenderer->processorder;
if ((sigrenderer->processrow | 0xC00) ==
0xFFFE + 1) { /* It was incremented above! */
sigrenderer->processrow = sigrenderer->breakrow;
sigrenderer->breakrow = 0;
for (n = 0; n < DUMB_IT_N_CHANNELS; n++)
sigrenderer->channel[n].pat_loop_end_row = 0;
} else {
sigrenderer->processrow = sigrenderer->breakrow;
sigrenderer->breakrow = 0; // XXX lolwut
}
if (sigrenderer->processorder == 0xFFFF)
sigrenderer->processorder = sigrenderer->order - 1;
for (;;) {
sigrenderer->processorder++;
if (sigrenderer->processorder >= sigdata->n_orders) {
sigrenderer->processorder =
sigrenderer->restart_position;
if (sigrenderer->processorder >= sigdata->n_orders) {
/* Restarting beyond end. We'll loop for now. */
sigrenderer->processorder = -1;
continue;
}
if (sigdata->flags & IT_WAS_AN_OKT) {
/* Reset some things */
sigrenderer->speed = sigdata->speed;
sigrenderer->tempo = sigdata->tempo;
for (n = 0; n < DUMB_IT_N_CHANNELS; n++) {
xm_note_off(sigdata, &sigrenderer->channel[n]);
}
}
}
n = sigdata->order[sigrenderer->processorder];
if (n < sigdata->n_patterns)
break;
#ifdef INVALID_ORDERS_END_SONG
if (n != IT_ORDER_SKIP)
#else
if (n == IT_ORDER_END)
#endif
{
sigrenderer->processorder =
sigrenderer->restart_position - 1;
}
#ifdef BIT_ARRAY_BULLSHIT
/* Fix play tracking and timekeeping for orders containing
* skip commands */
for (n = 0; n < 256; n++) {
bit_array_set(sigrenderer->played,
sigrenderer->processorder * 256 + n);
timekeeping_array_push(sigrenderer->row_timekeeper,
sigrenderer->processorder * 256 +
n,
sigrenderer->time_played);
timekeeping_array_bump(sigrenderer->row_timekeeper,
sigrenderer->processorder * 256 +
n);
}
#endif
}
pattern = &sigdata->pattern[n];
n = sigrenderer->n_rows;
sigrenderer->n_rows = pattern->n_rows;
if (sigrenderer->processrow >= sigrenderer->n_rows)
sigrenderer->processrow = 0;
/** WARNING - everything pertaining to a new pattern
* initialised? */
if (pattern->entry) {
sigrenderer->entry = sigrenderer->entry_start =
pattern->entry;
sigrenderer->entry_end =
sigrenderer->entry + pattern->n_entries;
} else {
sigrenderer->entry = sigrenderer->entry_start = 0;
sigrenderer->entry_end = 0;
}
/* If n_rows was 0, we're only just starting. Don't do anything
* weird here. */
/* added: process row check, for break to row spooniness */
if (n &&
(processorder == 0xFFFF
? sigrenderer->order > sigrenderer->processorder
: sigrenderer->order >= sigrenderer->processorder)
#ifdef BIT_ARRAY_BULLSHIT
&& bit_array_test(sigrenderer->played,
sigrenderer->processorder * 256 +
sigrenderer->processrow)
#endif
) {
#ifdef BIT_ARRAY_BULLSHIT
sigrenderer->looped = 1;
#endif
if (sigrenderer->callbacks->loop) {
if ((*sigrenderer->callbacks->loop)(
sigrenderer->callbacks->loop_data))
return 1;
#ifdef BIT_ARRAY_BULLSHIT
bit_array_reset(sigrenderer->played);
#endif
if (sigrenderer->speed == 0)
goto speed0; /* I love goto */
}
}
sigrenderer->order = sigrenderer->processorder;
n = sigrenderer->processrow;
while (n) {
while (sigrenderer->entry < sigrenderer->entry_end) {
if (IT_IS_END_ROW(sigrenderer->entry)) {
sigrenderer->entry++;
break;
}
sigrenderer->entry++;
}
n--;
}
sigrenderer->row = sigrenderer->processrow;
} else {
if (sigrenderer->entry) {
while (sigrenderer->entry < sigrenderer->entry_end) {
if (IT_IS_END_ROW(sigrenderer->entry)) {
sigrenderer->entry++;
break;
}
sigrenderer->entry++;
}
sigrenderer->row++;
} else {
#ifdef BIT_ARRAY_BULLSHIT
bit_array_clear(sigrenderer->played,
sigrenderer->order * 256);
#endif
sigrenderer->entry = sigrenderer->entry_start;
sigrenderer->row = 0;
}
}
#ifdef BIT_ARRAY_BULLSHIT
if (sigrenderer->looped == 0) {
timekeeping_array_push(sigrenderer->row_timekeeper,
sigrenderer->order * 256 +
sigrenderer->row,
sigrenderer->time_played);
}
timekeeping_array_bump(sigrenderer->row_timekeeper,
sigrenderer->order * 256 + sigrenderer->row);
#endif
if (!(sigdata->flags & IT_WAS_A_669))
reset_effects(sigrenderer);
if (sigrenderer->entry) {
IT_ENTRY *entry = sigrenderer->entry;
int ignore_cxx = 0;
while (entry < sigrenderer->entry_end && !IT_IS_END_ROW(entry))
ignore_cxx |=
update_pattern_variables(sigrenderer, entry++);
entry = sigrenderer->entry;
while (entry < sigrenderer->entry_end && !IT_IS_END_ROW(entry))
if (process_entry(
sigrenderer, entry++,
sigdata->flags & IT_WAS_AN_XM ? 0 : ignore_cxx))
return 1;
}
if (sigdata->flags & IT_WAS_AN_OKT)
update_effects(sigrenderer);
else if (!(sigdata->flags & IT_OLD_EFFECTS))
update_smooth_effects(sigrenderer);
} else {
if (sigrenderer->entry) {
IT_ENTRY *entry = sigrenderer->entry;
while (entry < sigrenderer->entry_end &&
!IT_IS_END_ROW(entry)) {
if (entry->mask & IT_ENTRY_EFFECT &&
entry->effect != IT_SET_SAMPLE_OFFSET)
process_effects(sigrenderer, entry, 0);
/* Don't bother checking the return value; if there
* was a pattern delay, there can't be a speed=0.
*/
entry++;
}
}
update_effects(sigrenderer);
}
} else {
if (!(sigdata->flags & IT_WAS_AN_STM) || !(sigrenderer->tick & 15)) {
speed0:
update_effects(sigrenderer);
update_tick_counts(sigrenderer);
}
}
if (sigrenderer->globalvolume == 0) {
if (sigrenderer->callbacks->global_volume_zero) {
LONG_LONG t =
sigrenderer->gvz_sub_time +
((TICK_TIME_DIVIDEND / (sigrenderer->tempo << 8)) << 16);
sigrenderer->gvz_time += (int)(t >> 16);
sigrenderer->gvz_sub_time = (int)t & 65535;
if (sigrenderer->gvz_time >= 65536 * 12) {
#ifdef BIT_ARRAY_BULLSHIT
sigrenderer->looped = 1;
#endif
if ((*sigrenderer->callbacks->global_volume_zero)(
sigrenderer->callbacks->global_volume_zero_data))
return 1;
}
}
} else {
if (sigrenderer->callbacks->global_volume_zero) {
sigrenderer->gvz_time = 0;
sigrenderer->gvz_sub_time = 0;
}
}
process_all_playing(sigrenderer);
{
LONG_LONG t = (TICK_TIME_DIVIDEND / (sigrenderer->tempo << 8)) << 16;
if (sigrenderer->sigdata->flags & IT_WAS_AN_STM) {
t /= 16;
}
t += sigrenderer->sub_time_left;
sigrenderer->time_left += (int)(t >> 16);
sigrenderer->sub_time_left = (int)t & 65535;
}
return 0;
}
int dumb_it_max_to_mix = 64;
#if 0
static const int aiMODVol[] =
{
0,
16, 24, 32, 48, 64, 80, 96, 112,
128, 144, 160, 176, 192, 208, 224, 240,
256, 272, 288, 304, 320, 336, 352, 368,
384, 400, 416, 432, 448, 464, 480, 496,
529, 545, 561, 577, 593, 609, 625, 641,
657, 673, 689, 705, 721, 737, 753, 769,
785, 801, 817, 833, 849, 865, 881, 897,
913, 929, 945, 961, 977, 993, 1009, 1024
};
#endif
static const int aiPTMVolScaled[] = {
0, 31, 54, 73, 96, 111, 130, 153, 172, 191, 206, 222, 237,
252, 275, 298, 317, 336, 351, 370, 386, 401, 416, 428, 443, 454,
466, 477, 489, 512, 531, 553, 573, 592, 611, 626, 645, 660, 679,
695, 710, 725, 740, 756, 767, 782, 798, 809, 820, 836, 847, 859,
870, 881, 897, 908, 916, 927, 939, 950, 962, 969, 983, 1005, 1024};
static float calculate_volume(DUMB_IT_SIGRENDERER *sigrenderer,
IT_PLAYING *playing, float volume) {
if (volume != 0) {
int vol;
if (playing->channel->flags & IT_CHANNEL_MUTED)
return 0;
if ((playing->channel->tremor_time & 192) == 128)
return 0;
switch (playing->tremolo_waveform) {
default:
vol = it_sine[playing->tremolo_time];
break;
case 1:
vol = it_sawtooth[playing->tremolo_time];
break;
case 2:
vol = it_squarewave[playing->tremolo_time];
break;
case 3:
vol = (rand() % 129) - 64;
break;
case 4:
vol = it_xm_squarewave[playing->tremolo_time];
break;
case 5:
vol = it_xm_ramp[playing->tremolo_time];
break;
case 6:
vol = it_xm_ramp[255 - ((sigrenderer->sigdata->flags & IT_WAS_A_MOD)
? playing->vibrato_time
: playing->tremolo_time)];
break;
}
vol *= playing->tremolo_depth;
vol = (playing->volume << 5) + vol;
if (vol <= 0)
return 0;
if (vol > 64 << 5)
vol = 64 << 5;
if (sigrenderer->sigdata->flags & IT_WAS_A_PTM) {
int v = aiPTMVolScaled[vol >> 5];
if (vol < 64 << 5) {
int f = vol & ((1 << 5) - 1);
int f2 = (1 << 5) - f;
int v2 = aiPTMVolScaled[(vol >> 5) + 1];
v = (v * f2 + v2 * f) >> 5;
}
vol = v << 1;
}
volume *= vol; /* 64 << 5 */
volume *= playing->sample->global_volume; /* 64 */
volume *= playing->channel_volume; /* 64 */
volume *= sigrenderer->globalvolume; /* 128 */
volume *= sigrenderer->sigdata->mixing_volume; /* 128 */
volume *= 1.0f / ((64 << 5) * 64.0f * 64.0f * 128.0f * 128.0f);
if (volume && playing->instrument) {
if (playing->enabled_envelopes & IT_ENV_VOLUME &&
playing->env_instrument->volume_envelope.n_nodes) {
volume *=
envelope_get_y(&playing->env_instrument->volume_envelope,
&playing->volume_envelope);
volume *= 1.0f / (64 << IT_ENVELOPE_SHIFT);
}
volume *= playing->instrument->global_volume; /* 128 */
volume *= playing->fadeoutcount; /* 1024 */
volume *= 1.0f / (128.0f * 1024.0f);
}
}
return volume;
}
static int apply_pan_envelope(IT_PLAYING *playing) {
if (playing->pan <= 64 << IT_ENVELOPE_SHIFT) {
int pan;
if (playing->panbrello_depth) {
switch (playing->panbrello_waveform) {
default:
pan = it_sine[playing->panbrello_time];
break;
case 1:
pan = it_sawtooth[playing->panbrello_time];
break;
case 2:
pan = it_squarewave[playing->panbrello_time];
break;
case 3:
pan = playing->panbrello_random;
break;
}
pan *= playing->panbrello_depth << 3;
pan += playing->pan;
if (pan < 0)
pan = 0;
else if (pan > 64 << IT_ENVELOPE_SHIFT)
pan = 64 << IT_ENVELOPE_SHIFT;
} else {
pan = playing->pan;
}
if (playing->env_instrument &&
(playing->enabled_envelopes & IT_ENV_PANNING)) {
int p = envelope_get_y(&playing->env_instrument->pan_envelope,
&playing->pan_envelope);
if (pan > 32 << IT_ENVELOPE_SHIFT)
p *= (64 << IT_ENVELOPE_SHIFT) - pan;
else
p *= pan;
pan += p >> (5 + IT_ENVELOPE_SHIFT);
}
return pan;
}
return playing->pan;
}
/* Note: if a click remover is provided, and store_end_sample is set, then
* the end point will be computed twice. This situation should not arise.
*/
static long render_playing(DUMB_IT_SIGRENDERER *sigrenderer,
IT_PLAYING *playing, float volume, float main_delta,
float delta, long pos, long size, sample_t **samples,
int store_end_sample, int *left_to_mix) {
int bits;
long size_rendered;
DUMB_VOLUME_RAMP_INFO lvol, rvol;
if (playing->flags & IT_PLAYING_DEAD)
return 0;
if (*left_to_mix <= 0)
volume = 0;
{
int quality = sigrenderer->resampling_quality;
if (playing->sample->max_resampling_quality >= 0 &&
quality > playing->sample->max_resampling_quality)
quality = playing->sample->max_resampling_quality;
playing->resampler.quality = quality;
resampler_set_quality(playing->resampler.fir_resampler[0], quality);
resampler_set_quality(playing->resampler.fir_resampler[1], quality);
}
bits = playing->sample->flags & IT_SAMPLE_16BIT ? 16 : 8;
if (volume == 0) {
if (playing->sample->flags & IT_SAMPLE_STEREO)
size_rendered = dumb_resample_n_2_1(bits, &playing->resampler, NULL,
size, 0, 0, delta);
else
size_rendered = dumb_resample_n_1_1(bits, &playing->resampler, NULL,
size, 0, delta);
} else {
lvol.volume = playing->ramp_volume[0];
rvol.volume = playing->ramp_volume[1];
lvol.delta = playing->ramp_delta[0] * main_delta;
rvol.delta = playing->ramp_delta[1] * main_delta;
lvol.target = playing->float_volume[0];
rvol.target = playing->float_volume[1];
rvol.mix = lvol.mix = volume;
lvol.declick_stage = rvol.declick_stage = playing->declick_stage;
if (sigrenderer->n_channels >= 2) {
if (playing->sample->flags & IT_SAMPLE_STEREO) {
if (sigrenderer->click_remover) {
sample_t click[2];
dumb_resample_get_current_sample_n_2_2(
bits, &playing->resampler, &lvol, &rvol, click);
dumb_record_click(sigrenderer->click_remover[0], pos,
click[0]);
dumb_record_click(sigrenderer->click_remover[1], pos,
click[1]);
}
size_rendered = dumb_resample_n_2_2(bits, &playing->resampler,
samples[0] + pos * 2, size,
&lvol, &rvol, delta);
if (store_end_sample) {
sample_t click[2];
dumb_resample_get_current_sample_n_2_2(
bits, &playing->resampler, &lvol, &rvol, click);
samples[0][(pos + size_rendered) * 2] = click[0];
samples[0][(pos + size_rendered) * 2 + 1] = click[1];
}
if (sigrenderer->click_remover) {
sample_t click[2];
dumb_resample_get_current_sample_n_2_2(
bits, &playing->resampler, &lvol, &rvol, click);
dumb_record_click(sigrenderer->click_remover[0],
pos + size_rendered, -click[0]);
dumb_record_click(sigrenderer->click_remover[1],
pos + size_rendered, -click[1]);
}
} else {
if (sigrenderer->click_remover) {
sample_t click[2];
dumb_resample_get_current_sample_n_1_2(
bits, &playing->resampler, &lvol, &rvol, click);
dumb_record_click(sigrenderer->click_remover[0], pos,
click[0]);
dumb_record_click(sigrenderer->click_remover[1], pos,
click[1]);
}
size_rendered = dumb_resample_n_1_2(bits, &playing->resampler,
samples[0] + pos * 2, size,
&lvol, &rvol, delta);
if (store_end_sample) {
sample_t click[2];
dumb_resample_get_current_sample_n_1_2(
bits, &playing->resampler, &lvol, &rvol, click);
samples[0][(pos + size_rendered) * 2] = click[0];
samples[0][(pos + size_rendered) * 2 + 1] = click[1];
}
if (sigrenderer->click_remover) {
sample_t click[2];
dumb_resample_get_current_sample_n_1_2(
bits, &playing->resampler, &lvol, &rvol, click);
dumb_record_click(sigrenderer->click_remover[0],
pos + size_rendered, -click[0]);
dumb_record_click(sigrenderer->click_remover[1],
pos + size_rendered, -click[1]);
}
}
} else {
if (playing->sample->flags & IT_SAMPLE_STEREO) {
if (sigrenderer->click_remover) {
sample_t click;
dumb_resample_get_current_sample_n_2_1(
bits, &playing->resampler, &lvol, &rvol, &click);
dumb_record_click(sigrenderer->click_remover[0], pos,
click);
}
size_rendered = dumb_resample_n_2_1(bits, &playing->resampler,
samples[0] + pos, size,
&lvol, &rvol, delta);
if (store_end_sample)
dumb_resample_get_current_sample_n_2_1(
bits, &playing->resampler, &lvol, &rvol,
&samples[0][pos + size_rendered]);
if (sigrenderer->click_remover) {
sample_t click;
dumb_resample_get_current_sample_n_2_1(
bits, &playing->resampler, &lvol, &rvol, &click);
dumb_record_click(sigrenderer->click_remover[0],
pos + size_rendered, -click);
}
} else {
if (sigrenderer->click_remover) {
sample_t click;
dumb_resample_get_current_sample_n_1_1(
bits, &playing->resampler, &lvol, &click);
dumb_record_click(sigrenderer->click_remover[0], pos,
click);
}
size_rendered =
dumb_resample_n_1_1(bits, &playing->resampler,
samples[0] + pos, size, &lvol, delta);
if (store_end_sample)
dumb_resample_get_current_sample_n_1_1(
bits, &playing->resampler, &lvol,
&samples[0][pos + size_rendered]);
if (sigrenderer->click_remover) {
sample_t click;
dumb_resample_get_current_sample_n_1_1(
bits, &playing->resampler, &lvol, &click);
dumb_record_click(sigrenderer->click_remover[0],
pos + size_rendered, -click);
}
}
}
playing->ramp_volume[0] = lvol.volume;
playing->ramp_volume[1] = rvol.volume;
playing->declick_stage = (lvol.declick_stage > rvol.declick_stage)
? lvol.declick_stage
: rvol.declick_stage;
if (playing->declick_stage >= 4)
playing->flags |= IT_PLAYING_DEAD;
(*left_to_mix)--;
}
if (playing->resampler.dir == 0)
playing->flags |= IT_PLAYING_DEAD;
return size_rendered;
}
typedef struct IT_TO_MIX {
IT_PLAYING *playing;
float volume;
} IT_TO_MIX;
static int it_to_mix_compare(const void *e1, const void *e2) {
if (((const IT_TO_MIX *)e1)->volume > ((const IT_TO_MIX *)e2)->volume)
return -1;
if (((const IT_TO_MIX *)e1)->volume < ((const IT_TO_MIX *)e2)->volume)
return 1;
return 0;
}
static void apply_pitch_modifications(DUMB_IT_SIGDATA *sigdata,
IT_PLAYING *playing, float *delta,
int *cutoff) {
{
int sample_vibrato_shift;
switch (playing->sample_vibrato_waveform) {
default:
sample_vibrato_shift = it_sine[playing->sample_vibrato_time];
break;
case 1:
sample_vibrato_shift = it_sawtooth[playing->sample_vibrato_time];
break;
case 2:
sample_vibrato_shift = it_squarewave[playing->sample_vibrato_time];
break;
case 3:
sample_vibrato_shift = (rand() % 129) - 64;
break;
case 4:
sample_vibrato_shift =
it_xm_squarewave[playing->sample_vibrato_time];
break;
case 5:
sample_vibrato_shift = it_xm_ramp[playing->sample_vibrato_time];
break;
case 6:
sample_vibrato_shift =
it_xm_ramp[255 - playing->sample_vibrato_time];
break;
}
if (sigdata->flags & IT_WAS_AN_XM) {
int depth = playing->sample->vibrato_depth; /* True depth */
if (playing->sample->vibrato_rate) {
depth *= playing->sample_vibrato_depth; /* Tick number */
depth /= playing->sample->vibrato_rate; /* XM sweep */
}
sample_vibrato_shift *= depth;
} else
sample_vibrato_shift *= playing->sample_vibrato_depth >> 8;
sample_vibrato_shift >>= 4;
if (sample_vibrato_shift) {
if ((sigdata->flags & IT_LINEAR_SLIDES) ||
!(sigdata->flags & IT_WAS_AN_XM))
*delta *= (float)pow(DUMB_PITCH_BASE, sample_vibrato_shift);
else {
/* complicated! */
float scale = *delta / playing->delta;
*delta = (1.0f / 65536.0f) / playing->delta;
*delta -= sample_vibrato_shift / AMIGA_DIVISOR;
if (*delta < (1.0f / 65536.0f) / 32767.0f) {
*delta = (1.0f / 65536.0f) / 32767.0f;
}
*delta = (1.0f / 65536.0f) / *delta * scale;
}
}
}
if (playing->env_instrument &&
(playing->enabled_envelopes & IT_ENV_PITCH)) {
int p = envelope_get_y(&playing->env_instrument->pitch_envelope,
&playing->pitch_envelope);
if (playing->env_instrument->pitch_envelope.flags &
IT_ENVELOPE_PITCH_IS_FILTER)
*cutoff = (*cutoff * (p + (32 << IT_ENVELOPE_SHIFT))) >>
(6 + IT_ENVELOPE_SHIFT);
else
*delta *= (float)pow(DUMB_PITCH_BASE, p >> (IT_ENVELOPE_SHIFT - 7));
}
}
static void render_normal(DUMB_IT_SIGRENDERER *sigrenderer, float volume,
float delta, long pos, long size,
sample_t **samples) {
int i;
int n_to_mix = 0;
IT_TO_MIX to_mix[DUMB_IT_TOTAL_CHANNELS];
int left_to_mix = dumb_it_max_to_mix;
sample_t **samples_to_filter = NULL;
// int max_output = sigrenderer->max_output;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing &&
!(sigrenderer->channel[i].playing->flags & IT_PLAYING_DEAD)) {
to_mix[n_to_mix].playing = sigrenderer->channel[i].playing;
to_mix[n_to_mix].volume =
volume == 0
? 0
: calculate_volume(sigrenderer,
sigrenderer->channel[i].playing, volume);
n_to_mix++;
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer
->playing[i]) { /* Won't be dead; it would have been freed. */
to_mix[n_to_mix].playing = sigrenderer->playing[i];
to_mix[n_to_mix].volume =
volume == 0 ? 0
: calculate_volume(sigrenderer,
sigrenderer->playing[i], volume);
n_to_mix++;
}
}
if (volume != 0)
qsort(to_mix, n_to_mix, sizeof(IT_TO_MIX), &it_to_mix_compare);
for (i = 0; i < n_to_mix; i++) {
IT_PLAYING *playing = to_mix[i].playing;
float note_delta = delta * playing->delta;
int cutoff = playing->filter_cutoff << IT_ENVELOPE_SHIFT;
// int output = min( playing->output, max_output );
apply_pitch_modifications(sigrenderer->sigdata, playing, ¬e_delta,
&cutoff);
if (cutoff != 127 << IT_ENVELOPE_SHIFT ||
playing->filter_resonance != 0) {
playing->true_filter_cutoff = cutoff;
playing->true_filter_resonance = playing->filter_resonance;
}
if (volume &&
(playing->true_filter_cutoff != 127 << IT_ENVELOPE_SHIFT ||
playing->true_filter_resonance != 0)) {
if (!samples_to_filter) {
samples_to_filter =
allocate_sample_buffer(sigrenderer->n_channels, size + 1);
if (!samples_to_filter) {
render_playing(sigrenderer, playing, 0, delta, note_delta,
pos, size, NULL, 0, &left_to_mix);
continue;
}
}
{
long size_rendered;
DUMB_CLICK_REMOVER **cr = sigrenderer->click_remover;
dumb_silence(samples_to_filter[0],
sigrenderer->n_channels * (size + 1));
sigrenderer->click_remover = NULL;
size_rendered = render_playing(
sigrenderer, playing, volume, delta, note_delta, 0, size,
samples_to_filter, 1, &left_to_mix);
sigrenderer->click_remover = cr;
if (sigrenderer->n_channels == 2) {
it_filter(cr ? cr[0] : NULL, &playing->filter_state[0],
samples[0 /*output*/], pos, samples_to_filter[0],
size_rendered, 2, (int)(65536.0f / delta),
playing->true_filter_cutoff,
playing->true_filter_resonance);
it_filter(cr ? cr[1] : NULL, &playing->filter_state[1],
samples[0 /*output*/] + 1, pos,
samples_to_filter[0] + 1, size_rendered, 2,
(int)(65536.0f / delta),
playing->true_filter_cutoff,
playing->true_filter_resonance);
} else {
it_filter(cr ? cr[0] : NULL, &playing->filter_state[0],
samples[0 /*output*/], pos, samples_to_filter[0],
size_rendered, 1, (int)(65536.0f / delta),
playing->true_filter_cutoff,
playing->true_filter_resonance);
}
// FIXME: filtering is not prevented by low left_to_mix!
// FIXME: change 'warning' to 'FIXME' everywhere
}
} else {
it_reset_filter_state(&playing->filter_state[0]);
it_reset_filter_state(&playing->filter_state[1]);
render_playing(sigrenderer, playing, volume, delta, note_delta, pos,
size, samples /*&samples[output]*/, 0, &left_to_mix);
}
}
destroy_sample_buffer(samples_to_filter);
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing) {
// if ((sigrenderer->channel[i].playing->flags &
// (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) ==
// (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) {
// This change was made so Gxx would work correctly when a note
// faded out or whatever. Let's hope nothing else was broken by it.
if (sigrenderer->channel[i].playing->flags & IT_PLAYING_DEAD) {
free_playing(sigrenderer->channel[i].playing);
sigrenderer->channel[i].playing = NULL;
}
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer->playing[i]) {
if (sigrenderer->playing[i]->flags & IT_PLAYING_DEAD) {
free_playing(sigrenderer->playing[i]);
sigrenderer->playing[i] = NULL;
}
}
}
}
static void render_surround(DUMB_IT_SIGRENDERER *sigrenderer, float volume,
float delta, long pos, long size,
sample_t **samples) {
int i;
int n_to_mix = 0, n_to_mix_surround = 0;
IT_TO_MIX to_mix[DUMB_IT_TOTAL_CHANNELS];
IT_TO_MIX to_mix_surround[DUMB_IT_TOTAL_CHANNELS];
int left_to_mix = dumb_it_max_to_mix;
int saved_channels = sigrenderer->n_channels;
sample_t **samples_to_filter = NULL;
DUMB_CLICK_REMOVER **saved_cr = sigrenderer->click_remover;
// int max_output = sigrenderer->max_output;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing &&
!(sigrenderer->channel[i].playing->flags & IT_PLAYING_DEAD)) {
IT_PLAYING *playing = sigrenderer->channel[i].playing;
IT_TO_MIX *_to_mix = IT_IS_SURROUND_SHIFTED(playing->pan)
? to_mix_surround + n_to_mix_surround++
: to_mix + n_to_mix++;
_to_mix->playing = playing;
_to_mix->volume =
volume == 0 ? 0
: calculate_volume(sigrenderer, playing, volume);
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer
->playing[i]) { /* Won't be dead; it would have been freed. */
IT_PLAYING *playing = sigrenderer->playing[i];
IT_TO_MIX *_to_mix = IT_IS_SURROUND_SHIFTED(playing->pan)
? to_mix_surround + n_to_mix_surround++
: to_mix + n_to_mix++;
_to_mix->playing = playing;
_to_mix->volume =
volume == 0 ? 0
: calculate_volume(sigrenderer, playing, volume);
}
}
if (volume != 0) {
qsort(to_mix, n_to_mix, sizeof(IT_TO_MIX), &it_to_mix_compare);
qsort(to_mix_surround, n_to_mix_surround, sizeof(IT_TO_MIX),
&it_to_mix_compare);
}
sigrenderer->n_channels = 2;
for (i = 0; i < n_to_mix; i++) {
IT_PLAYING *playing = to_mix[i].playing;
float note_delta = delta * playing->delta;
int cutoff = playing->filter_cutoff << IT_ENVELOPE_SHIFT;
// int output = min( playing->output, max_output );
apply_pitch_modifications(sigrenderer->sigdata, playing, ¬e_delta,
&cutoff);
if (cutoff != 127 << IT_ENVELOPE_SHIFT ||
playing->filter_resonance != 0) {
playing->true_filter_cutoff = cutoff;
playing->true_filter_resonance = playing->filter_resonance;
}
if (volume &&
(playing->true_filter_cutoff != 127 << IT_ENVELOPE_SHIFT ||
playing->true_filter_resonance != 0)) {
if (!samples_to_filter) {
samples_to_filter =
allocate_sample_buffer(sigrenderer->n_channels, size + 1);
if (!samples_to_filter) {
render_playing(sigrenderer, playing, 0, delta, note_delta,
pos, size, NULL, 0, &left_to_mix);
continue;
}
}
{
long size_rendered;
DUMB_CLICK_REMOVER **cr = sigrenderer->click_remover;
dumb_silence(samples_to_filter[0],
sigrenderer->n_channels * (size + 1));
sigrenderer->click_remover = NULL;
size_rendered = render_playing(
sigrenderer, playing, volume, delta, note_delta, 0, size,
samples_to_filter, 1, &left_to_mix);
sigrenderer->click_remover = cr;
it_filter(cr ? cr[0] : NULL, &playing->filter_state[0],
samples[0 /*output*/], pos, samples_to_filter[0],
size_rendered, 2, (int)(65536.0f / delta),
playing->true_filter_cutoff,
playing->true_filter_resonance);
it_filter(cr ? cr[1] : NULL, &playing->filter_state[1],
samples[0 /*output*/] + 1, pos,
samples_to_filter[0] + 1, size_rendered, 2,
(int)(65536.0f / delta), playing->true_filter_cutoff,
playing->true_filter_resonance);
}
} else {
it_reset_filter_state(&playing->filter_state[0]);
it_reset_filter_state(&playing->filter_state[1]);
render_playing(sigrenderer, playing, volume, delta, note_delta, pos,
size, samples /*&samples[output]*/, 0, &left_to_mix);
}
}
sigrenderer->n_channels = 1;
sigrenderer->click_remover = saved_cr ? saved_cr + 2 : 0;
for (i = 0; i < n_to_mix_surround; i++) {
IT_PLAYING *playing = to_mix_surround[i].playing;
float note_delta = delta * playing->delta;
int cutoff = playing->filter_cutoff << IT_ENVELOPE_SHIFT;
// int output = min( playing->output, max_output );
apply_pitch_modifications(sigrenderer->sigdata, playing, ¬e_delta,
&cutoff);
if (cutoff != 127 << IT_ENVELOPE_SHIFT ||
playing->filter_resonance != 0) {
playing->true_filter_cutoff = cutoff;
playing->true_filter_resonance = playing->filter_resonance;
}
if (volume &&
(playing->true_filter_cutoff != 127 << IT_ENVELOPE_SHIFT ||
playing->true_filter_resonance != 0)) {
if (!samples_to_filter) {
samples_to_filter =
allocate_sample_buffer(sigrenderer->n_channels, size + 1);
if (!samples_to_filter) {
render_playing(sigrenderer, playing, 0, delta, note_delta,
pos, size, NULL, 0, &left_to_mix);
continue;
}
}
{
long size_rendered;
DUMB_CLICK_REMOVER **cr = sigrenderer->click_remover;
dumb_silence(samples_to_filter[0], size + 1);
sigrenderer->click_remover = NULL;
size_rendered = render_playing(
sigrenderer, playing, volume, delta, note_delta, 0, size,
samples_to_filter, 1, &left_to_mix);
sigrenderer->click_remover = cr;
it_filter(cr ? cr[0] : NULL, &playing->filter_state[0],
samples[1 /*output*/], pos, samples_to_filter[0],
size_rendered, 1, (int)(65536.0f / delta),
playing->true_filter_cutoff,
playing->true_filter_resonance);
// FIXME: filtering is not prevented by low left_to_mix!
// FIXME: change 'warning' to 'FIXME' everywhere
}
} else {
it_reset_filter_state(&playing->filter_state[0]);
it_reset_filter_state(&playing->filter_state[1]);
render_playing(sigrenderer, playing, volume, delta, note_delta, pos,
size, &samples[1], 0, &left_to_mix);
}
}
sigrenderer->n_channels = saved_channels;
sigrenderer->click_remover = saved_cr;
destroy_sample_buffer(samples_to_filter);
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing) {
// if ((sigrenderer->channel[i].playing->flags &
// (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) ==
// (IT_PLAYING_BACKGROUND | IT_PLAYING_DEAD)) {
// This change was made so Gxx would work correctly when a note
// faded out or whatever. Let's hope nothing else was broken by it.
if (sigrenderer->channel[i].playing->flags & IT_PLAYING_DEAD) {
free_playing(sigrenderer->channel[i].playing);
sigrenderer->channel[i].playing = NULL;
}
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer->playing[i]) {
if (sigrenderer->playing[i]->flags & IT_PLAYING_DEAD) {
free_playing(sigrenderer->playing[i]);
sigrenderer->playing[i] = NULL;
}
}
}
}
static void render(DUMB_IT_SIGRENDERER *sigrenderer, float volume, float delta,
long pos, long size, sample_t **samples) {
if (size == 0)
return;
if (sigrenderer->n_channels == 1 || sigrenderer->n_channels == 2)
render_normal(sigrenderer, volume, delta, pos, size, samples);
else if (sigrenderer->n_channels == 3)
render_surround(sigrenderer, volume, delta, pos, size, samples);
}
static DUMB_IT_SIGRENDERER *init_sigrenderer(DUMB_IT_SIGDATA *sigdata,
int n_channels, int startorder,
IT_CALLBACKS *callbacks,
DUMB_CLICK_REMOVER **cr) {
DUMB_IT_SIGRENDERER *sigrenderer;
int i;
if (startorder > sigdata->n_orders) {
free(callbacks);
dumb_destroy_click_remover_array(n_channels, cr);
return NULL;
}
sigrenderer = malloc(sizeof(*sigrenderer));
if (!sigrenderer) {
free(callbacks);
dumb_destroy_click_remover_array(n_channels, cr);
return NULL;
}
sigrenderer->callbacks = callbacks;
sigrenderer->click_remover = cr;
sigrenderer->sigdata = sigdata;
sigrenderer->n_channels = n_channels;
sigrenderer->resampling_quality = dumb_resampling_quality;
sigrenderer->ramp_style = DUMB_IT_RAMP_FULL;
sigrenderer->globalvolume = sigdata->global_volume;
sigrenderer->tempo = sigdata->tempo;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
IT_CHANNEL *channel = &sigrenderer->channel[i];
#if IT_CHANNEL_MUTED != 1
#error this is wrong
#endif
channel->flags = sigdata->channel_pan[i] >> 7;
channel->volume = (sigdata->flags & IT_WAS_AN_XM) ? 0 : 64;
channel->pan = sigdata->channel_pan[i] & 0x7F;
channel->truepan = channel->pan << IT_ENVELOPE_SHIFT;
channel->channelvolume = sigdata->channel_volume[i];
channel->instrument = 0;
channel->sample = 0;
channel->note = IT_NOTE_OFF;
channel->SFmacro = 0;
channel->filter_cutoff = 127;
channel->filter_resonance = 0;
channel->new_note_action = 0xFF;
channel->xm_retrig = 0;
channel->retrig_tick = 0;
channel->tremor_time = 0;
channel->vibrato_waveform = 0;
channel->tremolo_waveform = 0;
channel->panbrello_waveform = 0;
channel->glissando = 0;
channel->toneslide = 0;
channel->ptm_toneslide = 0;
channel->ptm_last_toneslide = 0;
channel->okt_toneslide = 0;
channel->midi_state = 0;
channel->lastvolslide = 0;
channel->lastDKL = 0;
channel->lastEF = 0;
channel->lastG = 0;
channel->lastHspeed = 0;
channel->lastHdepth = 0;
channel->lastRspeed = 0;
channel->lastRdepth = 0;
channel->lastYspeed = 0;
channel->lastYdepth = 0;
channel->lastI = 0;
channel->lastJ = 0;
channel->lastN = 0;
channel->lastO = 0;
channel->high_offset = 0;
channel->lastP = 0;
channel->lastQ = 0;
channel->lastS = 0;
channel->pat_loop_row = 0;
channel->pat_loop_count = 0;
channel->pat_loop_end_row = 0;
channel->lastW = 0;
channel->xm_lastE1 = 0;
channel->xm_lastE2 = 0;
channel->xm_lastEA = 0;
channel->xm_lastEB = 0;
channel->xm_lastX1 = 0;
channel->xm_lastX2 = 0;
channel->inv_loop_delay = 0;
channel->inv_loop_speed = 0;
channel->inv_loop_offset = 0;
channel->playing = NULL;
channel->key_off_count = 0;
channel->note_cut_count = 0;
channel->note_delay_count = 0;
channel->note_delay_entry = 0;
#ifdef BIT_ARRAY_BULLSHIT
channel->played_patjump = NULL;
channel->played_patjump_order = 0xFFFE;
#endif
// channel->output = 0;
}
if (sigdata->flags & IT_WAS_A_669)
reset_effects(sigrenderer);
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++)
sigrenderer->playing[i] = NULL;
sigrenderer->speed = sigdata->speed;
sigrenderer->processrow = 0xFFFE;
sigrenderer->n_rows = 0;
sigrenderer->breakrow = 0;
sigrenderer->rowcount = 1;
sigrenderer->order = startorder;
/* meh!
if (startorder > 0) {
int n;
for (n = startorder - 1; n >= 0; n--) {
if (sigdata->order[n] > sigdata->n_patterns) {
sigrenderer->restart_position = n + 1;
break;
}
}
}
*/
if (startorder > 0) {
sigrenderer->restart_position = startorder;
} else {
sigrenderer->restart_position = sigdata->restart_position;
}
sigrenderer->row = 0;
sigrenderer->processorder = startorder - 1;
sigrenderer->tick = 1;
#ifdef BIT_ARRAY_BULLSHIT
sigrenderer->played = bit_array_create(sigdata->n_orders * 256);
sigrenderer->looped = 0;
sigrenderer->time_played = 0;
sigrenderer->row_timekeeper =
timekeeping_array_create(sigdata->n_orders * 256);
#endif
{
int order;
for (order = 0; order < sigdata->n_orders; order++) {
int n = sigdata->order[order];
if (n < sigdata->n_patterns)
goto found_valid_order;
#ifdef INVALID_ORDERS_END_SONG
if (n != IT_ORDER_SKIP)
#else
if (n == IT_ORDER_END)
#endif
break;
#ifdef BIT_ARRAY_BULLSHIT
/* Fix for played order detection for songs which have skips at the
* start of the orders list */
for (n = 0; n < 256; n++) {
bit_array_set(sigrenderer->played, order * 256 + n);
timekeeping_array_push(sigrenderer->row_timekeeper,
order * 256 + n, 0);
timekeeping_array_bump(sigrenderer->row_timekeeper,
order * 256 + n);
}
#endif
}
/* If we get here, there were no valid orders in the song. */
_dumb_it_end_sigrenderer(sigrenderer);
return NULL;
}
found_valid_order:
sigrenderer->time_left = 0;
sigrenderer->sub_time_left = 0;
sigrenderer->gvz_time = 0;
sigrenderer->gvz_sub_time = 0;
// sigrenderer->max_output = 0;
if (!(sigdata->flags & IT_WAS_PROCESSED)) {
if (dumb_it_add_lpc(sigdata) < 0) {
_dumb_it_end_sigrenderer(sigrenderer);
return NULL;
}
sigdata->flags |= IT_WAS_PROCESSED;
}
return sigrenderer;
}
void dumb_it_set_resampling_quality(DUMB_IT_SIGRENDERER *sigrenderer,
int quality) {
if (sigrenderer && quality >= 0 && quality < DUMB_RQ_N_LEVELS) {
int i;
sigrenderer->resampling_quality = quality;
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing) {
IT_PLAYING *playing = sigrenderer->channel[i].playing;
playing->resampling_quality = quality;
playing->resampler.quality = quality;
resampler_set_quality(playing->resampler.fir_resampler[0],
quality);
resampler_set_quality(playing->resampler.fir_resampler[1],
quality);
}
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++) {
if (sigrenderer->playing[i]) {
IT_PLAYING *playing = sigrenderer->playing[i];
playing->resampling_quality = quality;
playing->resampler.quality = quality;
resampler_set_quality(playing->resampler.fir_resampler[0],
quality);
resampler_set_quality(playing->resampler.fir_resampler[1],
quality);
}
}
}
}
void dumb_it_set_ramp_style(DUMB_IT_SIGRENDERER *sigrenderer, int ramp_style) {
if (sigrenderer && ramp_style >= 0 && ramp_style <= 2) {
sigrenderer->ramp_style = ramp_style;
}
}
void dumb_it_set_loop_callback(DUMB_IT_SIGRENDERER *sigrenderer,
int (*callback)(void *data), void *data) {
if (sigrenderer) {
sigrenderer->callbacks->loop = callback;
sigrenderer->callbacks->loop_data = data;
}
}
void dumb_it_set_xm_speed_zero_callback(DUMB_IT_SIGRENDERER *sigrenderer,
int (*callback)(void *data),
void *data) {
if (sigrenderer) {
sigrenderer->callbacks->xm_speed_zero = callback;
sigrenderer->callbacks->xm_speed_zero_data = data;
}
}
void dumb_it_set_midi_callback(DUMB_IT_SIGRENDERER *sigrenderer,
int (*callback)(void *data, int channel,
unsigned char midi_byte),
void *data) {
if (sigrenderer) {
sigrenderer->callbacks->midi = callback;
sigrenderer->callbacks->midi_data = data;
}
}
void dumb_it_set_global_volume_zero_callback(DUMB_IT_SIGRENDERER *sigrenderer,
int (*callback)(void *data),
void *data) {
if (sigrenderer) {
sigrenderer->callbacks->global_volume_zero = callback;
sigrenderer->callbacks->global_volume_zero_data = data;
}
}
static IT_CALLBACKS *create_callbacks(void) {
IT_CALLBACKS *callbacks = malloc(sizeof(*callbacks));
if (!callbacks)
return NULL;
callbacks->loop = NULL;
callbacks->xm_speed_zero = NULL;
callbacks->midi = NULL;
callbacks->global_volume_zero = NULL;
return callbacks;
}
static DUMB_IT_SIGRENDERER *dumb_it_init_sigrenderer(DUMB_IT_SIGDATA *sigdata,
int n_channels,
int startorder) {
IT_CALLBACKS *callbacks;
if (!sigdata)
return NULL;
callbacks = create_callbacks();
if (!callbacks)
return NULL;
return init_sigrenderer(sigdata, n_channels, startorder, callbacks,
dumb_create_click_remover_array(n_channels));
}
DUH_SIGRENDERER *dumb_it_start_at_order(DUH *duh, int n_channels,
int startorder) {
DUMB_IT_SIGDATA *itsd = duh_get_it_sigdata(duh);
DUMB_IT_SIGRENDERER *itsr =
dumb_it_init_sigrenderer(itsd, n_channels, startorder);
/*duh->length = dumb_it_build_checkpoints(itsd, startorder);*/
return duh_encapsulate_it_sigrenderer(itsr, n_channels, 0);
}
static sigrenderer_t *it_start_sigrenderer(DUH *duh, sigdata_t *vsigdata,
int n_channels, long pos) {
DUMB_IT_SIGDATA *sigdata = vsigdata;
DUMB_IT_SIGRENDERER *sigrenderer;
(void)duh;
{
IT_CALLBACKS *callbacks = create_callbacks();
if (!callbacks)
return NULL;
if (sigdata->checkpoint) {
IT_CHECKPOINT *checkpoint = sigdata->checkpoint;
while (checkpoint->next && checkpoint->next->time < pos)
checkpoint = checkpoint->next;
sigrenderer =
dup_sigrenderer(checkpoint->sigrenderer, n_channels, callbacks);
if (!sigrenderer)
return NULL;
sigrenderer->click_remover =
dumb_create_click_remover_array(n_channels);
pos -= checkpoint->time;
} else {
sigrenderer =
init_sigrenderer(sigdata, n_channels, 0, callbacks,
dumb_create_click_remover_array(n_channels));
if (!sigrenderer)
return NULL;
}
}
while (pos > 0 && pos >= sigrenderer->time_left) {
render(sigrenderer, 0, 1.0f, 0, sigrenderer->time_left, NULL);
#ifdef BIT_ARRAY_BULLSHIT
sigrenderer->time_played += (LONG_LONG)sigrenderer->time_left << 16;
#endif
pos -= sigrenderer->time_left;
sigrenderer->time_left = 0;
if (process_tick(sigrenderer)) {
_dumb_it_end_sigrenderer(sigrenderer);
return NULL;
}
}
render(sigrenderer, 0, 1.0f, 0, pos, NULL);
sigrenderer->time_left -= pos;
#ifdef BIT_ARRAY_BULLSHIT
sigrenderer->time_played += (LONG_LONG)pos << 16;
#endif
return sigrenderer;
}
static long it_sigrenderer_get_samples(sigrenderer_t *vsigrenderer,
float volume, float delta, long size,
sample_t **samples) {
DUMB_IT_SIGRENDERER *sigrenderer = vsigrenderer;
long pos;
int dt;
long todo;
int ret;
LONG_LONG t;
if (sigrenderer->order < 0)
return 0; // problematic
if (!sigrenderer->tempo)
return 0; // also problematic
pos = 0;
dt = (int)(delta * 65536.0f + 0.5f);
/* When samples is finally used in render_playing(), it won't be used if
* volume is 0.
*/
if (!samples)
volume = 0;
for (;;) {
todo = (long)((((LONG_LONG)sigrenderer->time_left << 16) |
sigrenderer->sub_time_left) /
dt);
if (todo >= size)
break;
render(sigrenderer, volume, delta, pos, todo, samples);
pos += todo;
size -= todo;
t = sigrenderer->sub_time_left - (LONG_LONG)todo * dt;
sigrenderer->sub_time_left = (long)t & 65535;
sigrenderer->time_left += (long)(t >> 16);
#ifdef BIT_ARRAY_BULLSHIT
sigrenderer->time_played += (LONG_LONG)todo * dt;
#endif
ret = process_tick(sigrenderer);
if (ret) {
sigrenderer->order = -1;
sigrenderer->row = -1;
}
#ifdef BIT_ARRAY_BULLSHIT
if (sigrenderer->looped == 1) {
sigrenderer->looped = -1;
size = 0;
timekeeping_array_reset(sigrenderer->row_timekeeper,
sigrenderer->order * 256 +
sigrenderer->row);
sigrenderer->time_played = timekeeping_array_get_item(
sigrenderer->row_timekeeper,
sigrenderer->order * 256 + sigrenderer->row);
break;
}
#endif
if (ret) {
return pos;
}
}
render(sigrenderer, volume, delta, pos, size, samples);
pos += size;
t = sigrenderer->sub_time_left - (LONG_LONG)size * dt;
sigrenderer->sub_time_left = (long)t & 65535;
sigrenderer->time_left += (long)(t >> 16);
#ifdef BIT_ARRAY_BULLSHIT
sigrenderer->time_played += (LONG_LONG)size * dt;
#endif
if (samples)
dumb_remove_clicks_array(sigrenderer->n_channels,
sigrenderer->click_remover, samples, pos,
512.0f / delta);
return pos;
}
static void it_sigrenderer_get_current_sample(sigrenderer_t *vsigrenderer,
float volume, sample_t *samples) {
DUMB_IT_SIGRENDERER *sigrenderer = vsigrenderer;
(void)volume; // for consideration: in any of these such functions, is
// 'volume' going to be required?
dumb_click_remover_get_offset_array(sigrenderer->n_channels,
sigrenderer->click_remover, samples);
}
void _dumb_it_end_sigrenderer(sigrenderer_t *vsigrenderer) {
DUMB_IT_SIGRENDERER *sigrenderer = vsigrenderer;
int i;
if (sigrenderer) {
for (i = 0; i < DUMB_IT_N_CHANNELS; i++) {
if (sigrenderer->channel[i].playing)
free_playing(sigrenderer->channel[i].playing);
#ifdef BIT_ARRAY_BULLSHIT
bit_array_destroy(sigrenderer->channel[i].played_patjump);
#endif
}
for (i = 0; i < DUMB_IT_N_NNA_CHANNELS; i++)
if (sigrenderer->playing[i])
free_playing(sigrenderer->playing[i]);
dumb_destroy_click_remover_array(sigrenderer->n_channels,
sigrenderer->click_remover);
if (sigrenderer->callbacks)
free(sigrenderer->callbacks);
#ifdef BIT_ARRAY_BULLSHIT
bit_array_destroy(sigrenderer->played);
timekeeping_array_destroy(sigrenderer->row_timekeeper);
#endif
free(vsigrenderer);
}
}
#ifdef BIT_ARRAY_BULLSHIT
static long it_sigrenderer_get_position(sigrenderer_t *vsigrenderer) {
DUMB_IT_SIGRENDERER *sigrenderer = (DUMB_IT_SIGRENDERER *)vsigrenderer;
return (long)(sigrenderer->time_played >> 16);
}
#endif
DUH_SIGTYPE_DESC _dumb_sigtype_it = {SIGTYPE_IT,
NULL,
&it_start_sigrenderer,
NULL,
&it_sigrenderer_get_samples,
&it_sigrenderer_get_current_sample,
#ifdef BIT_ARRAY_BULLSHIT
&it_sigrenderer_get_position,
#else
NULL,
#endif
&_dumb_it_end_sigrenderer,
&_dumb_it_unload_sigdata};
DUH_SIGRENDERER *
duh_encapsulate_it_sigrenderer(DUMB_IT_SIGRENDERER *it_sigrenderer,
int n_channels, long pos) {
return duh_encapsulate_raw_sigrenderer(it_sigrenderer, &_dumb_sigtype_it,
n_channels, pos);
}
DUMB_IT_SIGRENDERER *duh_get_it_sigrenderer(DUH_SIGRENDERER *sigrenderer) {
return duh_get_raw_sigrenderer(sigrenderer, SIGTYPE_IT);
}
/* Values of 64 or more will access NNA channels here. */
void dumb_it_sr_get_channel_state(DUMB_IT_SIGRENDERER *sr, int channel,
DUMB_IT_CHANNEL_STATE *state) {
IT_PLAYING *playing;
int t; /* temporary var for holding accurate pan and filter cutoff */
float delta;
ASSERT(channel < DUMB_IT_TOTAL_CHANNELS);
if (!sr) {
state->sample = 0;
return;
}
if (channel >= DUMB_IT_N_CHANNELS) {
playing = sr->playing[channel - DUMB_IT_N_CHANNELS];
if (!playing) {
state->sample = 0;
return;
}
} else {
playing = sr->channel[channel].playing;
if (!playing) {
state->sample = 0;
return;
}
}
if (playing->flags & IT_PLAYING_DEAD) {
state->sample = 0;
return;
}
state->channel = (int)(playing->channel - sr->channel);
state->sample = playing->sampnum;
state->volume = calculate_volume(sr, playing, 1.0f);
t = apply_pan_envelope(playing);
state->pan = (unsigned char)((t + 128) >> IT_ENVELOPE_SHIFT);
state->subpan = (signed char)t;
delta = playing->delta * 65536.0f;
t = playing->filter_cutoff << IT_ENVELOPE_SHIFT;
apply_pitch_modifications(sr->sigdata, playing, &delta, &t);
state->freq = (int)delta;
if (t == 127 << IT_ENVELOPE_SHIFT && playing->filter_resonance == 0) {
state->filter_resonance = playing->true_filter_resonance;
t = playing->true_filter_cutoff;
} else
state->filter_resonance = playing->filter_resonance;
state->filter_cutoff = (unsigned char)(t >> 8);
state->filter_subcutoff = (unsigned char)t;
}
int dumb_it_callback_terminate(void *data) {
(void)data;
return 1;
}
int dumb_it_callback_midi_block(void *data, int channel,
unsigned char midi_byte) {
(void)data;
(void)channel;
(void)midi_byte;
return 1;
}
#define IT_CHECKPOINT_INTERVAL (30 * 65536) /* Half a minute */
#define FUCKIT_THRESHOLD \
(120 * 60 * 65536) /* two hours? probably a pattern loop mess... */
/* Returns the length of the module, up until it first loops. */
long dumb_it_build_checkpoints(DUMB_IT_SIGDATA *sigdata, int startorder) {
IT_CHECKPOINT *checkpoint;
if (!sigdata)
return 0;
checkpoint = sigdata->checkpoint;
while (checkpoint) {
IT_CHECKPOINT *next = checkpoint->next;
_dumb_it_end_sigrenderer(checkpoint->sigrenderer);
free(checkpoint);
checkpoint = next;
}
sigdata->checkpoint = NULL;
checkpoint = malloc(sizeof(*checkpoint));
if (!checkpoint)
return 0;
checkpoint->time = 0;
checkpoint->sigrenderer = dumb_it_init_sigrenderer(sigdata, 0, startorder);
if (!checkpoint->sigrenderer) {
free(checkpoint);
return 0;
}
checkpoint->sigrenderer->callbacks->loop = &dumb_it_callback_terminate;
checkpoint->sigrenderer->callbacks->xm_speed_zero =
&dumb_it_callback_terminate;
checkpoint->sigrenderer->callbacks->global_volume_zero =
&dumb_it_callback_terminate;
if (sigdata->checkpoint) {
IT_CHECKPOINT *checkpoint = sigdata->checkpoint;
while (checkpoint) {
IT_CHECKPOINT *next = checkpoint->next;
_dumb_it_end_sigrenderer(checkpoint->sigrenderer);
free(checkpoint);
checkpoint = next;
}
}
sigdata->checkpoint = checkpoint;
for (;;) {
long l;
DUMB_IT_SIGRENDERER *sigrenderer = dup_sigrenderer(
checkpoint->sigrenderer, 0, checkpoint->sigrenderer->callbacks);
checkpoint->sigrenderer->callbacks = NULL;
if (!sigrenderer) {
checkpoint->next = NULL;
return checkpoint->time;
}
l = it_sigrenderer_get_samples(sigrenderer, 0, 1.0f,
IT_CHECKPOINT_INTERVAL, NULL);
if (l < IT_CHECKPOINT_INTERVAL) {
_dumb_it_end_sigrenderer(sigrenderer);
checkpoint->next = NULL;
return checkpoint->time + l;
}
checkpoint->next = malloc(sizeof(*checkpoint->next));
if (!checkpoint->next) {
_dumb_it_end_sigrenderer(sigrenderer);
return checkpoint->time + IT_CHECKPOINT_INTERVAL;
}
checkpoint->next->time = checkpoint->time + IT_CHECKPOINT_INTERVAL;
checkpoint = checkpoint->next;
checkpoint->sigrenderer = sigrenderer;
if (checkpoint->time >= FUCKIT_THRESHOLD) {
checkpoint->next = NULL;
return 0;
}
}
}
void dumb_it_do_initial_runthrough(DUH *duh) {
if (duh) {
DUMB_IT_SIGDATA *sigdata = duh_get_it_sigdata(duh);
if (sigdata)
duh_set_length(duh, dumb_it_build_checkpoints(sigdata, 0));
}
}
static int is_pattern_silent(IT_PATTERN *pattern, int order) {
int ret = 1;
IT_ENTRY *entry, *end;
if (!pattern || !pattern->n_rows || !pattern->n_entries || !pattern->entry)
return 2;
if (pattern->n_entries == pattern->n_rows) {
int n;
entry = pattern->entry;
for (n = 0; n < pattern->n_entries; ++n, ++entry) {
if (!IT_IS_END_ROW(entry))
break;
}
if (n == pattern->n_entries)
return 2;
// broken?
}
entry = pattern->entry;
end = entry + pattern->n_entries;
while (entry < end) {
if (!IT_IS_END_ROW(entry)) {
if (entry->mask & (IT_ENTRY_INSTRUMENT | IT_ENTRY_VOLPAN))
return 0;
if (entry->mask & IT_ENTRY_NOTE && entry->note < 120)
return 0;
if (entry->mask & IT_ENTRY_EFFECT) {
switch (entry->effect) {
case IT_SET_GLOBAL_VOLUME:
if (entry->effectvalue)
return 0;
break;
case IT_SET_SPEED:
if (entry->effectvalue > 64)
ret++;
break;
case IT_SET_SONG_TEMPO:
case IT_XM_KEY_OFF:
break;
case IT_JUMP_TO_ORDER:
if (entry->effectvalue != order)
return 0;
break;
case IT_S:
switch (entry->effectvalue >> 4) {
case 0: // meh bastard
if (entry->effectvalue != 0)
return 0;
break;
case IT_S_FINE_PATTERN_DELAY:
case IT_S_PATTERN_LOOP:
case IT_S_PATTERN_DELAY:
ret++;
break;
case IT_S7:
if ((entry->effectvalue & 15) > 2)
return 0;
break;
default:
return 0;
}
break;
// clever idiot with his S L O W crap; do nothing
case IT_VOLSLIDE_TONEPORTA:
case IT_SET_SAMPLE_OFFSET:
case IT_GLOBAL_VOLUME_SLIDE:
if (entry->effectvalue != 0)
return 0;
break;
// genius also uses this instead of jump to order by mistake,
// meh, and it's bloody BCD
case IT_BREAK_TO_ROW:
if (((entry->effectvalue >> 4) * 10 +
(entry->effectvalue & 15)) != order)
return 0;
break;
default:
return 0;
}
}
}
entry++;
}
return ret;
}
int dumb_it_trim_silent_patterns(DUH *duh) {
int n;
DUMB_IT_SIGDATA *sigdata;
if (!duh)
return -1;
sigdata = duh_get_it_sigdata(duh);
if (!sigdata || !sigdata->order || !sigdata->pattern)
return -1;
for (n = 0; n < sigdata->n_orders; n++) {
int p = sigdata->order[n];
if (p < sigdata->n_patterns) {
IT_PATTERN *pattern = &sigdata->pattern[p];
if (is_pattern_silent(pattern, n) > 1) {
pattern->n_rows = 1;
pattern->n_entries = 0;
if (pattern->entry) {
free(pattern->entry);
pattern->entry = NULL;
}
} else
break;
}
}
if (n == sigdata->n_orders)
return -1;
for (n = sigdata->n_orders - 1; n >= 0; n--) {
int p = sigdata->order[n];
if (p < sigdata->n_patterns) {
IT_PATTERN *pattern = &sigdata->pattern[p];
if (is_pattern_silent(pattern, n) > 1) {
pattern->n_rows = 1;
pattern->n_entries = 0;
if (pattern->entry) {
free(pattern->entry);
pattern->entry = NULL;
}
} else
break;
}
}
if (n < 0)
return -1;
/*duh->length = dumb_it_build_checkpoints(sigdata, 0);*/
return 0;
}
int dumb_it_scan_for_playable_orders(DUMB_IT_SIGDATA *sigdata,
dumb_scan_callback callback,
void *callback_data) {
int n;
long length;
void *ba_played;
DUMB_IT_SIGRENDERER *sigrenderer;
if (!sigdata->n_orders || !sigdata->order)
return -1;
ba_played = bit_array_create(sigdata->n_orders * 256);
if (!ba_played)
return -1;
/* Skip the first order, it should always be played */
for (n = 1; n < sigdata->n_orders; n++) {
if ((sigdata->order[n] >= sigdata->n_patterns) ||
(is_pattern_silent(&sigdata->pattern[sigdata->order[n]], n) > 1))
bit_array_set(ba_played, n * 256);
}
for (;;) {
for (n = 0; n < sigdata->n_orders; n++) {
if (!bit_array_test_range(ba_played, n * 256, 256))
break;
}
if (n == sigdata->n_orders)
break;
sigrenderer = dumb_it_init_sigrenderer(sigdata, 0, n);
if (!sigrenderer) {
bit_array_destroy(ba_played);
return -1;
}
sigrenderer->callbacks->loop = &dumb_it_callback_terminate;
sigrenderer->callbacks->xm_speed_zero = &dumb_it_callback_terminate;
sigrenderer->callbacks->global_volume_zero =
&dumb_it_callback_terminate;
length = 0;
for (;;) {
long l;
l = it_sigrenderer_get_samples(sigrenderer, 0, 1.0f,
IT_CHECKPOINT_INTERVAL, NULL);
length += l;
if (l < IT_CHECKPOINT_INTERVAL || length >= FUCKIT_THRESHOLD) {
/* SONG OVA! */
break;
}
}
if ((*callback)(callback_data, n, length) < 0)
return -1;
bit_array_merge(ba_played, sigrenderer->played, 0);
_dumb_it_end_sigrenderer(sigrenderer);
}
bit_array_destroy(ba_played);
return 0;
}