ref: 5d8df0e043f05d080a990d32cfca46e00758953a
dir: /src/pt2_pat2smp.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 <math.h>
#include "pt2_config.h"
#include "pt2_helpers.h"
#include "pt2_visuals.h"
#include "pt2_audio.h"
#include "pt2_sampler.h"
#include "pt2_textout.h"
#include "pt2_tables.h"
#include "pt2_downsample2x.h"
#include "pt2_replayer.h"
static const char *noteStr[12] =
{
"c-", "c#", "d-", "d#", "e-", "f-", "f#", "g-", "g#", "a-", "a#", "b-"
};
static bool pat2SmpEndReached;
static uint8_t pat2SmpFinetune = 4, pat2SmpNote = 33; // A-3 finetune +4 (default, max safe frequency)
static uint8_t pat2SmpStartRow = 0, pat2SmpRows = 32;
static int32_t pat2SmpPos;
static double *dMixBufferL, *dMixBufferR, *dPat2SmpBuf, dPat2SmpFreq, dSeconds;
static void pat2SmpOutputAudio(int32_t numSamples)
{
int32_t samplesTodo = numSamples;
if (pat2SmpPos+samplesTodo > config.maxSampleLength)
samplesTodo = config.maxSampleLength - pat2SmpPos;
paulaGenerateSamples(dMixBufferL, dMixBufferR, samplesTodo*2); // 2x oversampling
for (int32_t i = 0; i < samplesTodo; i++)
{
// 2x downsampling (decimation)
double dL = decimate2x_L(dMixBufferL[(i << 1) + 0], dMixBufferL[(i << 1) + 1]);
double dR = decimate2x_R(dMixBufferR[(i << 1) + 0], dMixBufferR[(i << 1) + 1]);
dPat2SmpBuf[pat2SmpPos+i] = (dL + dR) * 0.5; // stereo -> mono, normalized to -128..127 later
}
pat2SmpPos += samplesTodo;
if (pat2SmpPos >= config.maxSampleLength)
pat2SmpEndReached = true;
}
void pat2SmpDrawNote(void)
{
fillRect(165, 51, FONT_CHAR_W*3, FONT_CHAR_H, video.palette[PAL_GENBKG]);
textOut(165, 51, noteNames1[2+pat2SmpNote], video.palette[PAL_GENTXT]);
}
void pat2SmpDrawFinetune(void)
{
fillRect(173, 62, FONT_CHAR_W*2, FONT_CHAR_H, video.palette[PAL_GENBKG]);
textOut(173, 62, ftuneStrTab[pat2SmpFinetune], video.palette[PAL_GENTXT]);
}
void pat2SmpDrawFrequency(void)
{
const int32_t maxTextWidth = 19 * FONT_CHAR_W;
fillRect(164, 74, maxTextWidth, FONT_CHAR_H, video.palette[PAL_GENBKG]);
if (dPat2SmpFreq*2.0 < PAL_PAULA_MAX_HZ)
{
textOut(164, 74, "TOO LOW!", video.palette[PAL_GENTXT]);
}
else
{
char textBuf[32];
sprintf(textBuf, "%dHz (%.1f secs)", (int32_t)(dPat2SmpFreq + 0.5), dSeconds);
textOut(164, 74, textBuf, video.palette[PAL_GENTXT]);
}
}
void pat2SmpDrawStartRow(void)
{
fillRect(276, 51, FONT_CHAR_W*2, FONT_CHAR_H, video.palette[PAL_GENBKG]);
printTwoDecimals(276, 51, pat2SmpStartRow, video.palette[PAL_GENTXT]);
}
void pat2SmpDrawRows(void)
{
fillRect(276, 62, FONT_CHAR_W*2, FONT_CHAR_H, video.palette[PAL_GENBKG]);
printTwoDecimals(276, 62, pat2SmpRows, video.palette[PAL_GENTXT]);
}
void pat2SmpCalculateFreq(void)
{
if (pat2SmpFinetune > 15)
pat2SmpFinetune = 15;
if (pat2SmpNote > 35)
pat2SmpNote = 35;
dPat2SmpFreq = PAULA_PAL_CLK / (double)periodTable[(pat2SmpFinetune * 37) + pat2SmpNote];
if (dPat2SmpFreq > PAL_PAULA_MAX_HZ)
dPat2SmpFreq = PAL_PAULA_MAX_HZ;
dSeconds = config.maxSampleLength / dPat2SmpFreq;
pat2SmpDrawFrequency();
}
void pat2SmpNoteUp(void)
{
if (pat2SmpNote < 35)
{
pat2SmpNote++;
pat2SmpDrawNote();
if (pat2SmpNote == 35 && pat2SmpFinetune < 8) // high-limit to B-3 finetune 0
{
pat2SmpFinetune = 0;
pat2SmpDrawFinetune();
}
pat2SmpCalculateFreq();
}
}
void pat2SmpNoteDown(void)
{
if (pat2SmpNote > 23)
{
pat2SmpNote--;
pat2SmpDrawNote();
if (pat2SmpNote == 23 && pat2SmpFinetune > 7) // low-limit to B-2 finetune 0
{
pat2SmpFinetune = 0;
pat2SmpDrawFinetune();
}
pat2SmpCalculateFreq();
}
}
void pat2SmpSetFinetune(uint8_t finetune)
{
pat2SmpFinetune = finetune & 0x0F;
pat2SmpDrawFinetune();
pat2SmpCalculateFreq();
}
void pat2SmpFinetuneUp(void)
{
if ((pat2SmpFinetune & 0xF) != 7)
pat2SmpFinetune = (pat2SmpFinetune + 1) & 0xF;
if (pat2SmpNote == 35 && pat2SmpFinetune < 8) // for B-3, high-limit finetune to 0
pat2SmpFinetune = 0;
pat2SmpDrawFinetune();
pat2SmpCalculateFreq();
}
void pat2SmpFinetuneDown(void)
{
if ((pat2SmpFinetune & 0xF) != 8)
pat2SmpFinetune = (pat2SmpFinetune - 1) & 0xF;
if (pat2SmpNote == 23 && pat2SmpFinetune > 7) // for B-2, low-limit finetune to 0
pat2SmpFinetune = 0;
pat2SmpDrawFinetune();
pat2SmpCalculateFreq();
}
void pat2SmpStartRowUp(void)
{
if (pat2SmpStartRow+pat2SmpRows < 64)
{
pat2SmpStartRow++;
pat2SmpDrawStartRow();
}
}
void pat2SmpStartRowDown(void)
{
if (pat2SmpStartRow > 0)
{
pat2SmpStartRow--;
pat2SmpDrawStartRow();
}
}
void pat2SmpRowsUp(void)
{
if (pat2SmpStartRow+pat2SmpRows < 64)
{
pat2SmpRows++;
pat2SmpDrawRows();
}
}
void pat2SmpRowsDown(void)
{
if (pat2SmpRows > 1)
{
pat2SmpRows--;
pat2SmpDrawRows();
}
}
void pat2SmpRender(void)
{
if (editor.sampleZero)
{
statusNotSampleZero();
return;
}
dPat2SmpBuf = (double *)malloc(config.maxSampleLength * sizeof (double));
if (dPat2SmpBuf == NULL)
{
statusOutOfMemory();
return;
}
const double dAudioFrequency = dPat2SmpFreq * 2.0; // *2 for oversampling
int32_t maxSamplesPerTick = (int32_t)ceil(dAudioFrequency / (MIN_BPM / 2.5)) + 1;
dMixBufferL = (double *)malloc(maxSamplesPerTick * sizeof (double));
dMixBufferR = (double *)malloc(maxSamplesPerTick * sizeof (double));
if (dMixBufferL == NULL || dMixBufferR == NULL)
{
free(dPat2SmpBuf);
if (dMixBufferL != NULL) free(dMixBufferL);
if (dMixBufferR != NULL) free(dMixBufferR);
statusOutOfMemory();
return;
}
const int8_t oldRow = editor.songPlaying ? 0 : song->currRow;
editor.pat2SmpOngoing = true; // this must be set first
// do some prep work
generateBpmTable(dPat2SmpFreq, editor.timingMode == TEMPO_MODE_VBLANK);
paulaSetup(dPat2SmpFreq*2.0, MODEL_A1200);
paulaDisableFilters();
storeTempVariables();
restartSong(); // this also updates BPM (samples per tick) with the PAT2SMP audio output rate
clearMixerDownsamplerStates();
song->currRow = song->row = 0;
pat2SmpPos = 0;
uint64_t samplesToMixFrac = 0;
bool lastRow = false;
pat2SmpEndReached = false;
while (!pat2SmpEndReached && editor.songPlaying)
{
/* PT replayer ticker (also sets audio.samplesPerTickInt and audio.samplesPerTickFrac).
** Returns false on end of song.
*/
if (!intMusic())
lastRow = true;
if (song->row > pat2SmpStartRow+pat2SmpRows)
break; // we rendered as many rows as requested (don't write this tick to output)
uint32_t samplesToMix = audio.samplesPerTickInt;
samplesToMixFrac += audio.samplesPerTickFrac;
if (samplesToMixFrac >= BPM_FRAC_SCALE)
{
samplesToMixFrac &= BPM_FRAC_MASK;
samplesToMix++;
}
if (lastRow && song->tick == song->speed-1)
pat2SmpEndReached = true;
if (lastRow || song->row > pat2SmpStartRow)
pat2SmpOutputAudio(samplesToMix);
}
editor.pat2SmpOngoing = false;
free(dMixBufferL);
free(dMixBufferR);
song->currRow = song->row = oldRow; // set back old row
// set back audio configurations
const int32_t paulaMixFrequency = audio.oversamplingFlag ? audio.outputRate*2 : audio.outputRate;
paulaSetup(paulaMixFrequency, audio.amigaModel);
generateBpmTable(audio.outputRate, editor.timingMode == TEMPO_MODE_VBLANK);
clearMixerDownsamplerStates();
resetSong(); // this also updates BPM (samples per tick) with the tracker's audio output rate
moduleSample_t *s = &song->samples[editor.currSample];
// normalize and quantize to 8-bit
const double dPeak = getDoublePeak(dPat2SmpBuf, pat2SmpPos);
double dAmp = INT8_MAX;
if (dPeak > 0.0)
dAmp = INT8_MAX / dPeak;
int8_t *smpPtr = &song->sampleData[s->offset];
for (int32_t i = 0; i < pat2SmpPos; i++)
{
double dSmp = dPat2SmpBuf[i] * dAmp;
// faster than calling round()
if (dSmp < 0.0) dSmp -= 0.5;
else if (dSmp > 0.0) dSmp += 0.5;
int32_t smp = (int32_t)dSmp;
assert(smp >= -128 && smp <= 127); // shouldn't happen according to dAmp
smpPtr[i] = (int8_t)smp;
}
free(dPat2SmpBuf);
int32_t newSampleLength = (pat2SmpPos + 1) & ~1;
if (newSampleLength > config.maxSampleLength)
newSampleLength = config.maxSampleLength;
// clear the rest of the sample (if not full)
if (newSampleLength < config.maxSampleLength)
memset(&song->sampleData[s->offset+newSampleLength], 0, config.maxSampleLength - newSampleLength);
// set sample attributes
s->length = newSampleLength;
s->volume = 64;
s->fineTune = pat2SmpFinetune;
s->loopStart = 0;
s->loopLength = 2;
// set sample name
const int32_t note = pat2SmpNote % 12;
const int32_t octave = (pat2SmpNote / 12) + 1;
if (pat2SmpFinetune == 0)
sprintf(s->text, "pat2smp(%s%d ftune: 0)", noteStr[note], octave);
else if (pat2SmpFinetune < 8)
sprintf(s->text, "pat2smp(%s%d ftune:+%d)", noteStr[note], octave, pat2SmpFinetune);
else
sprintf(s->text, "pat2smp(%s%d ftune:-%d)", noteStr[note], octave, (pat2SmpFinetune^7)-7);
fixSampleBeep(s);
updateCurrSample();
editor.samplePos = 0; // reset Edit Op. sample position
updateWindowTitle(MOD_IS_MODIFIED);
}