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finally support loading floating-point samples

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tildearrow 2022-06-16 22:07:12 -05:00
parent ed6a110d44
commit 327952f3f4
1 changed files with 47 additions and 11 deletions
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50
src/engine/engine.cpp
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@ -2201,8 +2201,22 @@ int DivEngine::addSampleFromFile(const char* path) {
BUSY_END;
return -1;
}
short* buf=new short[si.channels*si.frames];
if (sf_readf_short(f,buf,si.frames)!=si.frames) {
void* buf=NULL;
sf_count_t sampleLen=sizeof(short);
if ((si.format&SF_FORMAT_SUBMASK)==SF_FORMAT_PCM_U8) {
logD("sample is 8-bit unsigned");
buf=new unsigned char[si.channels*si.frames];
sampleLen=sizeof(unsigned char);
} else if ((si.format&SF_FORMAT_SUBMASK)==SF_FORMAT_FLOAT) {
logD("sample is 32-bit float");
buf=new float[si.channels*si.frames];
sampleLen=sizeof(float);
} else {
logD("sample is 16-bit signed");
buf=new short[si.channels*si.frames];
sampleLen=sizeof(short);
}
if (sf_read_raw(f,buf,si.frames*si.channels*sampleLen)!=(si.frames*si.channels*sampleLen)) {
logW("sample read size mismatch!");
}
DivSample* sample=new DivSample;
@ -2216,19 +2230,41 @@ int DivEngine::addSampleFromFile(const char* path) {
sample->depth=16;
}
sample->init(si.frames);
if ((si.format&SF_FORMAT_SUBMASK)==SF_FORMAT_PCM_U8) {
for (int i=0; i<si.frames*si.channels; i+=si.channels) {
int averaged=0;
for (int j=0; j<si.channels; j++) {
averaged+=buf[i+j];
averaged+=((unsigned char*)buf)[i+j];
}
averaged/=si.channels;
if (((si.format&SF_FORMAT_SUBMASK)==SF_FORMAT_PCM_U8)) {
sample->data8[index++]=averaged>>8;
} else {
sample->data8[index++]=averaged;
}
delete[] (unsigned char*)buf;
} else if ((si.format&SF_FORMAT_SUBMASK)==SF_FORMAT_FLOAT) {
for (int i=0; i<si.frames*si.channels; i+=si.channels) {
float averaged=0.0f;
for (int j=0; j<si.channels; j++) {
averaged+=((float*)buf)[i+j];
}
averaged/=si.channels;
averaged*=32767.0;
if (averaged<-32768.0) averaged=-32768.0;
if (averaged>32767.0) averaged=32767.0;
sample->data16[index++]=averaged;
}
delete[] (float*)buf;
} else {
for (int i=0; i<si.frames*si.channels; i+=si.channels) {
int averaged=0;
for (int j=0; j<si.channels; j++) {
averaged+=((short*)buf)[i+j];
}
delete[] buf;
averaged/=si.channels;
sample->data16[index++]=averaged;
}
delete[] (short*)buf;
}
sample->rate=si.samplerate;
if (sample->rate<4000) sample->rate=4000;
if (sample->rate>96000) sample->rate=96000;