ref: 86c4bc48273411469e5fb85c352ccf38eb207d18
dir: /src/it/readdsmf.c/
/* _______ ____ __ ___ ___
* \ _ \ \ / \ / \ \ / / ' ' '
* | | \ \ | | || | \/ | . .
* | | | | | | || ||\ /| |
* | | | | | | || || \/ | | ' ' '
* | | | | | | || || | | . .
* | |_/ / \ \__// || | |
* /_______/ynamic \____/niversal /__\ /____\usic /| . . ibliotheque
* / \
* / . \
* readam.c - Code to read a RIFF DSMF module / / \ \
* from a parsed RIFF structure. | < / \_
* | \/ /\ /
* By Christopher Snowhill. \_ / > /
* | \ / /
* | ' /
* \__/
*/
#include <stdlib.h>
#include <string.h>
#include "dumb.h"
#include "internal/it.h"
#include "internal/riff.h"
static int it_riff_dsmf_process_sample(IT_SAMPLE *sample, DUMBFILE *f,
int len) {
int flags;
dumbfile_getnc((char *)sample->filename, 13, f);
sample->filename[14] = 0;
flags = dumbfile_igetw(f);
sample->default_volume = dumbfile_getc(f);
sample->length = dumbfile_igetl(f);
sample->loop_start = dumbfile_igetl(f);
sample->loop_end = dumbfile_igetl(f);
dumbfile_skip(f, 32 - 28);
sample->C5_speed = dumbfile_igetw(f) * 2;
dumbfile_skip(f, 36 - 34);
dumbfile_getnc((char *)sample->name, 28, f);
sample->name[28] = 0;
/*if ( data[ 0x38 ] || data[ 0x39 ] || data[ 0x3A ] || data[ 0x3B ] )
return -1;*/
if (!sample->length) {
sample->flags &= ~IT_SAMPLE_EXISTS;
return 0;
}
/*if ( flags & ~( 2 | 1 ) )
return -1;*/
if (sample->length + 64 > len)
return -1;
sample->flags = IT_SAMPLE_EXISTS;
sample->default_pan = 0;
sample->global_volume = 64;
sample->vibrato_speed = 0;
sample->vibrato_depth = 0;
sample->vibrato_rate = 0;
sample->vibrato_waveform = IT_VIBRATO_SINE;
sample->finetune = 0;
sample->max_resampling_quality = -1;
if (flags & 1) {
if (((unsigned int)sample->loop_end <= (unsigned int)sample->length) &&
((unsigned int)sample->loop_start <
(unsigned int)sample->loop_end)) {
sample->length = sample->loop_end;
sample->flags |= IT_SAMPLE_LOOP;
if (flags & 0x10)
sample->flags |= IT_SAMPLE_PINGPONG_LOOP;
}
}
sample->data = malloc(sample->length);
if (!sample->data)
return -1;
dumbfile_getnc(sample->data, sample->length, f);
if (!(flags & 2)) {
for (flags = 0; flags < sample->length; ++flags)
((signed char *)sample->data)[flags] ^= 0x80;
}
return 0;
}
static int it_riff_dsmf_process_pattern(IT_PATTERN *pattern, DUMBFILE *f,
int len) {
int length, row;
unsigned flags;
long start, end;
int p, q, r;
IT_ENTRY *entry;
length = dumbfile_igetw(f);
if (length > len)
return -1;
len = length - 2;
pattern->n_rows = 64;
pattern->n_entries = 64;
row = 0;
start = dumbfile_pos(f);
end = start + len;
while ((row < 64) && !dumbfile_error(f) && (dumbfile_pos(f) < end)) {
p = dumbfile_getc(f);
if (!p) {
++row;
continue;
}
flags = p & 0xF0;
if (flags) {
++pattern->n_entries;
if (flags & 0x80)
dumbfile_skip(f, 1);
if (flags & 0x40)
dumbfile_skip(f, 1);
if (flags & 0x20)
dumbfile_skip(f, 1);
if (flags & 0x10)
dumbfile_skip(f, 2);
}
}
if (pattern->n_entries == 64)
return 0;
pattern->entry = malloc(pattern->n_entries * sizeof(*pattern->entry));
if (!pattern->entry)
return -1;
entry = pattern->entry;
row = 0;
if (dumbfile_seek(f, start, DFS_SEEK_SET))
return -1;
while ((row < 64) && !dumbfile_error(f) && (dumbfile_pos(f) < end)) {
p = dumbfile_getc(f);
if (!p) {
IT_SET_END_ROW(entry);
++entry;
++row;
continue;
}
flags = p;
entry->channel = flags & 0x0F;
entry->mask = 0;
if (flags & 0xF0) {
if (flags & 0x80) {
q = dumbfile_getc(f);
if (q) {
entry->mask |= IT_ENTRY_NOTE;
entry->note = q - 1;
}
}
if (flags & 0x40) {
q = dumbfile_getc(f);
if (q) {
entry->mask |= IT_ENTRY_INSTRUMENT;
entry->instrument = q;
}
}
if (flags & 0x20) {
entry->mask |= IT_ENTRY_VOLPAN;
entry->volpan = dumbfile_getc(f);
}
if (flags & 0x10) {
q = dumbfile_getc(f);
r = dumbfile_getc(f);
_dumb_it_xm_convert_effect(q, r, entry, 0);
}
if (entry->mask)
entry++;
}
}
while (row < 64) {
IT_SET_END_ROW(entry);
++entry;
++row;
}
pattern->n_entries = (int)((long)entry - (long)pattern->entry);
if (!pattern->n_entries)
return -1;
return 0;
}
static DUMB_IT_SIGDATA *it_riff_dsmf_load_sigdata(DUMBFILE *f,
struct riff *stream) {
DUMB_IT_SIGDATA *sigdata;
int n, o, found;
if (!stream)
goto error;
if (stream->type != DUMB_ID('D', 'S', 'M', 'F'))
goto error;
sigdata = malloc(sizeof(*sigdata));
if (!sigdata)
goto error;
sigdata->n_patterns = 0;
sigdata->n_samples = 0;
sigdata->name[0] = 0;
found = 0;
for (n = 0; (unsigned)n < stream->chunk_count; ++n) {
struct riff_chunk *c = stream->chunks + n;
switch (c->type) {
case DUMB_ID('S', 'O', 'N', 'G'):
/* initialization data */
if ((found) || (c->size < 192))
goto error_sd;
found = 1;
break;
case DUMB_ID('P', 'A', 'T', 'T'):
++sigdata->n_patterns;
break;
case DUMB_ID('I', 'N', 'S', 'T'):
++sigdata->n_samples;
break;
}
}
if (!found || !sigdata->n_samples || !sigdata->n_patterns)
goto error_sd;
if (sigdata->n_samples > 255 || sigdata->n_patterns > 255)
goto error_sd;
sigdata->song_message = NULL;
sigdata->order = NULL;
sigdata->instrument = NULL;
sigdata->sample = NULL;
sigdata->pattern = NULL;
sigdata->midi = NULL;
sigdata->checkpoint = NULL;
sigdata->mixing_volume = 48;
sigdata->pan_separation = 128;
sigdata->n_instruments = 0;
sigdata->n_orders = 0;
sigdata->restart_position = 0;
memset(sigdata->channel_volume, 64, DUMB_IT_N_CHANNELS);
for (n = 0; n < DUMB_IT_N_CHANNELS; n += 4) {
int sep = 32 * dumb_it_default_panning_separation / 100;
sigdata->channel_pan[n] = 32 - sep;
sigdata->channel_pan[n + 1] = 32 + sep;
sigdata->channel_pan[n + 2] = 32 + sep;
sigdata->channel_pan[n + 3] = 32 - sep;
}
for (n = 0; (unsigned)n < stream->chunk_count; ++n) {
struct riff_chunk *c = stream->chunks + n;
switch (c->type) {
case DUMB_ID('S', 'O', 'N', 'G'):
if (dumbfile_seek(f, c->offset, DFS_SEEK_SET))
goto error_usd;
dumbfile_getnc((char *)sigdata->name, 28, f);
sigdata->name[28] = 0;
sigdata->flags = IT_STEREO | IT_OLD_EFFECTS | IT_COMPATIBLE_GXX;
dumbfile_skip(f, 36 - 28);
sigdata->n_orders = dumbfile_igetw(f);
if (sigdata->n_orders > 1024) // Whoa, nelly.
goto error_usd;
// sigdata->n_samples = ptr[ 38 ] | ( ptr[ 39 ] << 8 ); // whatever
// sigdata->n_patterns = ptr[ 40 ] | ( ptr[ 41 ] << 8 );
dumbfile_skip(f, 42 - 38);
sigdata->n_pchannels = dumbfile_igetw(f);
sigdata->global_volume = dumbfile_getc(f);
sigdata->mixing_volume = dumbfile_getc(f);
sigdata->speed = dumbfile_getc(f);
sigdata->tempo = dumbfile_getc(f);
for (o = 0; o < 16; ++o) {
sigdata->channel_pan[o] = dumbfile_getc(f) / 2;
}
sigdata->order = malloc(128);
if (!sigdata->order)
goto error_usd;
dumbfile_getnc((char *)sigdata->order, 128, f);
break;
}
}
sigdata->pattern = malloc(sigdata->n_patterns * sizeof(*sigdata->pattern));
if (!sigdata->pattern)
goto error_usd;
for (n = 0; n < sigdata->n_patterns; ++n)
sigdata->pattern[n].entry = NULL;
sigdata->sample = malloc(sigdata->n_samples * sizeof(*sigdata->sample));
if (!sigdata->sample)
goto error_usd;
for (n = 0; n < sigdata->n_samples; ++n) {
IT_SAMPLE *sample = sigdata->sample + n;
sample->data = NULL;
}
sigdata->n_samples = 0;
sigdata->n_patterns = 0;
for (n = 0; (unsigned)n < stream->chunk_count; ++n) {
struct riff_chunk *c = stream->chunks + n;
switch (c->type) {
case DUMB_ID('P', 'A', 'T', 'T'):
if (dumbfile_seek(f, c->offset, DFS_SEEK_SET))
goto error_usd;
if (it_riff_dsmf_process_pattern(
sigdata->pattern + sigdata->n_patterns, f, c->size))
goto error_usd;
++sigdata->n_patterns;
break;
case DUMB_ID('I', 'N', 'S', 'T'):
if (dumbfile_seek(f, c->offset, DFS_SEEK_SET))
goto error_usd;
if (it_riff_dsmf_process_sample(
sigdata->sample + sigdata->n_samples, f, c->size))
goto error_usd;
++sigdata->n_samples;
break;
}
}
if (_dumb_it_fix_invalid_orders(sigdata) < 0) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
return sigdata;
error_usd:
_dumb_it_unload_sigdata(sigdata);
goto error;
error_sd:
free(sigdata);
error:
return NULL;
}
DUH *dumb_read_riff_dsmf(DUMBFILE *f, struct riff *stream) {
sigdata_t *sigdata;
DUH_SIGTYPE_DESC *descptr = &_dumb_sigtype_it;
sigdata = it_riff_dsmf_load_sigdata(f, stream);
if (!sigdata)
return NULL;
{
const char *tag[2][2];
tag[0][0] = "TITLE";
tag[0][1] = (const char *)(((DUMB_IT_SIGDATA *)sigdata)->name);
tag[1][0] = "FORMAT";
tag[1][1] = "RIFF DSMF";
return make_duh(-1, 2, (const char *const(*)[2])tag, 1, &descptr,
&sigdata);
}
}