ref: 8333335001e54764cb306ee1fbf85c40e6e3590e
dir: /src/pt2_mod2wav.c/
// for finding memory leaks in debug mode with Visual Studio
#if defined _DEBUG && defined _MSC_VER
#include <crtdbg.h>
#endif
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <sys/stat.h> // stat()
#include "pt2_header.h"
#include "pt2_audio.h"
#include "pt2_mouse.h"
#include "pt2_textout.h"
#include "pt2_visuals.h"
#include "pt2_mod2wav.h"
#include "pt2_structs.h"
#define TICKS_PER_RENDER_CHUNK 32
void storeTempVariables(void); // pt_modplayer.c
bool intMusic(void); // pt_modplayer.c
static volatile bool wavRenderingDone;
static int16_t *mod2WavBuffer;
static void calcMod2WavTotalRows(void);
static void renderSamples(int32_t samplesPerTick, int16_t *outStream)
{
if (!intMusic())
wavRenderingDone = true;
outputAudio(outStream, samplesPerTick);
}
static int32_t SDLCALL mod2WavThreadFunc(void *ptr)
{
wavHeader_t wavHeader;
FILE *f = (FILE *)ptr;
assert(mod2WavBuffer != NULL && f != NULL);
// skip wav header place, render data first
fseek(f, sizeof (wavHeader_t), SEEK_SET);
wavRenderingDone = false;
uint8_t loopCounter = 8;
uint32_t totalSampleCounter = 0;
double dTickSamples = audio.dSamplesPerTick;
bool renderDone = false;
while (!renderDone)
{
uint32_t samplesInChunk = 0;
// render several ticks at once to prevent frequent disk I/O (can speed up the process)
int16_t *ptr16 = mod2WavBuffer;
for (uint32_t i = 0; i < TICKS_PER_RENDER_CHUNK; i++)
{
if (!editor.isWAVRendering || wavRenderingDone || editor.abortMod2Wav || !editor.songPlaying)
{
renderDone = true;
break;
}
int32_t tickSamples = (int32_t)dTickSamples;
renderSamples(tickSamples, ptr16);
dTickSamples -= tickSamples; // keep fractional part
dTickSamples += audio.dSamplesPerTick;
tickSamples *= 2; // stereo
samplesInChunk += tickSamples;
totalSampleCounter += tickSamples;
ptr16 += tickSamples;
if (++loopCounter >= 8)
{
loopCounter = 0;
ui.updateMod2WavDialog = true;
}
}
// write buffer to disk
if (samplesInChunk > 0)
fwrite(mod2WavBuffer, sizeof (int16_t), samplesInChunk, f);
}
free(mod2WavBuffer);
if (totalSampleCounter & 1)
fputc(0, f); // pad align byte
uint32_t totalRiffChunkLen = (uint32_t)ftell(f) - 8;
// go back and fill in WAV header
rewind(f);
wavHeader.chunkID = 0x46464952; // "RIFF"
wavHeader.chunkSize = totalRiffChunkLen;
wavHeader.format = 0x45564157; // "WAVE"
wavHeader.subchunk1ID = 0x20746D66; // "fmt "
wavHeader.subchunk1Size = 16;
wavHeader.audioFormat = 1;
wavHeader.numChannels = 2;
wavHeader.sampleRate = MOD2WAV_FREQ;
wavHeader.bitsPerSample = 16;
wavHeader.byteRate = (wavHeader.sampleRate * wavHeader.numChannels * wavHeader.bitsPerSample) / 8;
wavHeader.blockAlign = (wavHeader.numChannels * wavHeader.bitsPerSample) / 8;
wavHeader.subchunk2ID = 0x61746164; // "data"
wavHeader.subchunk2Size = totalSampleCounter * sizeof (int16_t);
// write main header
fwrite(&wavHeader, sizeof (wavHeader_t), 1, f);
fclose(f);
ui.mod2WavFinished = true;
ui.updateMod2WavDialog = true;
return true;
}
bool renderToWav(char *fileName, bool checkIfFileExist)
{
FILE *fOut;
struct stat statBuffer;
if (checkIfFileExist)
{
if (stat(fileName, &statBuffer) == 0)
{
ui.askScreenShown = true;
ui.askScreenType = ASK_MOD2WAV_OVERWRITE;
pointerSetMode(POINTER_MODE_MSG1, NO_CARRY);
setStatusMessage("OVERWRITE FILE?", NO_CARRY);
renderAskDialog();
return false;
}
}
if (ui.askScreenShown)
{
ui.askScreenShown = false;
ui.answerNo = false;
ui.answerYes = false;
}
fOut = fopen(fileName, "wb");
if (fOut == NULL)
{
displayErrorMsg("FILE I/O ERROR");
return false;
}
const int32_t lowestBPM = 32;
const int32_t maxSamplesToMix = (int32_t)ceil(TICKS_PER_RENDER_CHUNK * audio.bpmTableMod2Wav[lowestBPM-32]); // stereo
mod2WavBuffer = (int16_t *)malloc(maxSamplesToMix * (2 * sizeof (int16_t)));
if (mod2WavBuffer == NULL)
{
statusOutOfMemory();
return false;
}
storeTempVariables();
calcMod2WavTotalRows();
restartSong();
editor.blockMarkFlag = false;
pointerSetMode(POINTER_MODE_MSG2, NO_CARRY);
setStatusMessage("RENDERING MOD...", NO_CARRY);
ui.disableVisualizer = true;
editor.isWAVRendering = true;
renderMOD2WAVDialog();
editor.abortMod2Wav = false;
modSetTempo(song->currBPM, true); // update BPM with MOD2WAV audio output rate
editor.mod2WavThread = SDL_CreateThread(mod2WavThreadFunc, NULL, fOut);
if (editor.mod2WavThread != NULL)
{
SDL_DetachThread(editor.mod2WavThread);
}
else
{
free(mod2WavBuffer);
ui.disableVisualizer = false;
editor.isWAVRendering = false;
displayErrorMsg("THREAD ERROR");
pointerSetMode(POINTER_MODE_IDLE, DO_CARRY);
statusAllRight();
return false;
}
return true;
}
// ONLY used for a visual percentage counter, so accuracy is not very important
static void calcMod2WavTotalRows(void)
{
bool pBreakFlag, posJumpAssert, calcingRows;
int8_t n_pattpos[AMIGA_VOICES], n_loopcount[AMIGA_VOICES];
uint8_t modRow, pBreakPosition, ch, pos;
int16_t modOrder;
uint16_t modPattern;
note_t *note;
// for pattern loop
memset(n_pattpos, 0, sizeof (n_pattpos));
memset(n_loopcount, 0, sizeof (n_loopcount));
song->rowsCounter = 0;
song->rowsInTotal = 0;
modRow = 0;
modOrder = 0;
modPattern = song->header.order[0];
pBreakPosition = 0;
posJumpAssert = false;
pBreakFlag = false;
calcingRows = true;
memset(editor.rowVisitTable, 0, MOD_ORDERS * MOD_ROWS);
while (calcingRows)
{
editor.rowVisitTable[(modOrder * MOD_ROWS) + modRow] = true;
for (ch = 0; ch < AMIGA_VOICES; ch++)
{
note = &song->patterns[modPattern][(modRow * AMIGA_VOICES) + ch];
if (note->command == 0x0B) // Bxx - Position Jump
{
modOrder = note->param - 1;
pBreakPosition = 0;
posJumpAssert = true;
}
else if (note->command == 0x0D) // Dxx - Pattern Break
{
pBreakPosition = (((note->param >> 4) * 10) + (note->param & 0x0F));
if (pBreakPosition > 63)
pBreakPosition = 0;
posJumpAssert = true;
}
else if (note->command == 0x0F && note->param == 0) // F00 - Set Speed 0 (stop)
{
calcingRows = false;
break;
}
else if (note->command == 0x0E && (note->param >> 4) == 0x06) // E6x - Pattern Loop
{
pos = note->param & 0x0F;
if (pos == 0)
{
n_pattpos[ch] = modRow;
}
else if (n_loopcount[ch] == 0)
{
n_loopcount[ch] = pos;
pBreakPosition = n_pattpos[ch];
pBreakFlag = true;
for (pos = pBreakPosition; pos <= modRow; pos++)
editor.rowVisitTable[(modOrder * MOD_ROWS) + pos] = false;
}
else if (--n_loopcount[ch])
{
pBreakPosition = n_pattpos[ch];
pBreakFlag = true;
for (pos = pBreakPosition; pos <= modRow; pos++)
editor.rowVisitTable[(modOrder * MOD_ROWS) + pos] = false;
}
}
}
modRow++;
song->rowsInTotal++;
if (pBreakFlag)
{
modRow = pBreakPosition;
pBreakPosition = 0;
pBreakFlag = false;
}
if (modRow >= MOD_ROWS || posJumpAssert)
{
modRow = pBreakPosition;
pBreakPosition = 0;
posJumpAssert = false;
modOrder = (modOrder + 1) & 0x7F;
if (modOrder >= song->header.numOrders)
{
modOrder = 0;
calcingRows = false;
break;
}
modPattern = song->header.order[modOrder];
if (modPattern > MAX_PATTERNS-1)
modPattern = MAX_PATTERNS-1;
}
if (editor.rowVisitTable[(modOrder * MOD_ROWS) + modRow])
{
// row has been visited before, we're now done!
calcingRows = false;
break;
}
}
}