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furnace/src/engine/fileOpsSample.cpp
tildearrow dc27c996fb hmmm
2024-04-05 16:11:23 -05:00

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/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2024 tildearrow and contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "engine.h"
#include "../ta-log.h"
#include "../fileutils.h"
#ifdef HAVE_SNDFILE
#include "sfWrapper.h"
#endif
DivSample* DivEngine::sampleFromFile(const char* path) {
if (song.sample.size()>=256) {
lastError="too many samples!";
return NULL;
}
BUSY_BEGIN;
warnings="";
const char* pathRedux=strrchr(path,DIR_SEPARATOR);
if (pathRedux==NULL) {
pathRedux=path;
} else {
pathRedux++;
}
String stripPath;
const char* pathReduxEnd=strrchr(pathRedux,'.');
if (pathReduxEnd==NULL) {
stripPath=pathRedux;
} else {
for (const char* i=pathRedux; i!=pathReduxEnd && (*i); i++) {
stripPath+=*i;
}
}
const char* ext=strrchr(path,'.');
if (ext!=NULL) {
String extS;
for (; *ext; ext++) {
char i=*ext;
if (i>='A' && i<='Z') {
i+='a'-'A';
}
extS+=i;
}
if (extS==".dmc" || extS==".brr") { // read as .dmc or .brr
size_t len=0;
DivSample* sample=new DivSample;
sample->name=stripPath;
FILE* f=ps_fopen(path,"rb");
if (f==NULL) {
BUSY_END;
lastError=fmt::sprintf("could not open file! (%s)",strerror(errno));
delete sample;
return NULL;
}
if (fseek(f,0,SEEK_END)<0) {
fclose(f);
BUSY_END;
lastError=fmt::sprintf("could not get file length! (%s)",strerror(errno));
delete sample;
return NULL;
}
len=ftell(f);
if (len==0) {
fclose(f);
BUSY_END;
lastError="file is empty!";
delete sample;
return NULL;
}
if (len==(SIZE_MAX>>1)) {
fclose(f);
BUSY_END;
lastError="file is invalid!";
delete sample;
return NULL;
}
if (fseek(f,0,SEEK_SET)<0) {
fclose(f);
BUSY_END;
lastError=fmt::sprintf("could not seek to beginning of file! (%s)",strerror(errno));
delete sample;
return NULL;
}
if (extS==".dmc") {
sample->rate=33144;
sample->centerRate=33144;
sample->depth=DIV_SAMPLE_DEPTH_1BIT_DPCM;
sample->init(len*8);
} else if (extS==".brr") {
sample->rate=32000;
sample->centerRate=32000;
sample->depth=DIV_SAMPLE_DEPTH_BRR;
sample->init(16*(len/9));
} else {
fclose(f);
BUSY_END;
lastError="wait... is that right? no I don't think so...";
delete sample;
return NULL;
}
unsigned char* dataBuf=sample->dataDPCM;
if (extS==".brr") {
dataBuf=sample->dataBRR;
if ((len%9)==2) {
// read loop position
unsigned short loopPos=0;
logD("BRR file has loop position");
if (fread(&loopPos,1,2,f)!=2) {
logW("could not read loop position! %s",strerror(errno));
} else {
#ifdef TA_BIG_ENDIAN
loopPos=(loopPos>>8)|(loopPos<<8);
#endif
sample->loopStart=16*(loopPos/9);
sample->loopEnd=sample->samples;
sample->loop=true;
sample->loopMode=DIV_SAMPLE_LOOP_FORWARD;
}
len-=2;
if (len==0) {
fclose(f);
BUSY_END;
lastError="BRR sample is empty!";
delete sample;
return NULL;
}
} else if ((len%9)!=0) {
fclose(f);
BUSY_END;
lastError="possibly corrupt BRR sample!";
delete sample;
return NULL;
}
}
if (fread(dataBuf,1,len,f)==0) {
fclose(f);
BUSY_END;
lastError=fmt::sprintf("could not read file! (%s)",strerror(errno));
delete sample;
return NULL;
}
BUSY_END;
return sample;
}
}
#ifndef HAVE_SNDFILE
lastError="Furnace was not compiled with libsndfile!";
return NULL;
#else
SF_INFO si;
SFWrapper sfWrap;
memset(&si,0,sizeof(SF_INFO));
SNDFILE* f=sfWrap.doOpen(path,SFM_READ,&si);
if (f==NULL) {
BUSY_END;
int err=sf_error(NULL);
if (err==SF_ERR_SYSTEM) {
lastError=fmt::sprintf("could not open file! (%s %s)",sf_error_number(err),strerror(errno));
} else {
lastError=fmt::sprintf("could not open file! (%s)\nif this is raw sample data, you may import it by right-clicking the Load Sample icon and selecting \"import raw\".",sf_error_number(err));
}
return NULL;
}
if (si.frames>16777215) {
lastError="this sample is too big! max sample size is 16777215.";
sfWrap.doClose();
BUSY_END;
return NULL;
}
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 ((si.format&SF_FORMAT_SUBMASK)==SF_FORMAT_PCM_U8 || (si.format&SF_FORMAT_SUBMASK)==SF_FORMAT_FLOAT) {
if (sf_read_raw(f,buf,si.frames*si.channels*sampleLen)!=(si.frames*si.channels*sampleLen)) {
logW("sample read size mismatch!");
}
} else {
if (sf_read_short(f,(short*)buf,si.frames*si.channels)!=(si.frames*si.channels)) {
logW("sample read size mismatch!");
}
}
DivSample* sample=new DivSample;
int sampleCount=(int)song.sample.size();
sample->name=stripPath;
int index=0;
if ((si.format&SF_FORMAT_SUBMASK)==SF_FORMAT_PCM_U8) {
sample->depth=DIV_SAMPLE_DEPTH_8BIT;
} else {
sample->depth=DIV_SAMPLE_DEPTH_16BIT;
}
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+=((int)((unsigned char*)buf)[i+j])-128;
}
averaged/=si.channels;
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];
}
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;
sample->centerRate=si.samplerate;
SF_INSTRUMENT inst;
if (sf_command(f, SFC_GET_INSTRUMENT, &inst, sizeof(inst)) == SF_TRUE)
{
// There's no documentation on libsndfile detune range, but the code
// implies -50..50. Yet when loading a file you can get a >50 value.
// disabled for now
/*
if(inst.detune > 50)
inst.detune = inst.detune - 100;
short pitch = ((0x3c-inst.basenote)*100) + inst.detune;
sample->centerRate=si.samplerate*pow(2.0,pitch/(12.0 * 100.0));
*/
if(inst.loop_count && inst.loops[0].mode >= SF_LOOP_FORWARD)
{
sample->loop=true;
sample->loopMode=(DivSampleLoopMode)(inst.loops[0].mode-SF_LOOP_FORWARD);
sample->loopStart=inst.loops[0].start;
sample->loopEnd=inst.loops[0].end;
if(inst.loops[0].end < (unsigned int)sampleCount)
sampleCount=inst.loops[0].end;
}
else
sample->loop=false;
}
if (sample->centerRate<4000) sample->centerRate=4000;
if (sample->centerRate>64000) sample->centerRate=64000;
sfWrap.doClose();
BUSY_END;
return sample;
#endif
}
DivSample* DivEngine::sampleFromFileRaw(const char* path, DivSampleDepth depth, int channels, bool bigEndian, bool unsign, bool swapNibbles, int rate) {
if (song.sample.size()>=256) {
lastError="too many samples!";
return NULL;
}
if (channels<1) {
channels=1;
}
if (depth!=DIV_SAMPLE_DEPTH_8BIT && depth!=DIV_SAMPLE_DEPTH_16BIT) {
if (channels!=1) {
channels=1;
}
}
BUSY_BEGIN;
warnings="";
const char* pathRedux=strrchr(path,DIR_SEPARATOR);
if (pathRedux==NULL) {
pathRedux=path;
} else {
pathRedux++;
}
String stripPath;
const char* pathReduxEnd=strrchr(pathRedux,'.');
if (pathReduxEnd==NULL) {
stripPath=pathRedux;
} else {
for (const char* i=pathRedux; i!=pathReduxEnd && (*i); i++) {
stripPath+=*i;
}
}
size_t len=0;
size_t lenDivided=0;
DivSample* sample=new DivSample;
sample->name=stripPath;
FILE* f=ps_fopen(path,"rb");
if (f==NULL) {
BUSY_END;
lastError=fmt::sprintf("could not open file! (%s)",strerror(errno));
delete sample;
return NULL;
}
if (fseek(f,0,SEEK_END)<0) {
fclose(f);
BUSY_END;
lastError=fmt::sprintf("could not get file length! (%s)",strerror(errno));
delete sample;
return NULL;
}
len=ftell(f);
if (len==0) {
fclose(f);
BUSY_END;
lastError="file is empty!";
delete sample;
return NULL;
}
if (len==(SIZE_MAX>>1)) {
fclose(f);
BUSY_END;
lastError="file is invalid!";
delete sample;
return NULL;
}
if (fseek(f,0,SEEK_SET)<0) {
fclose(f);
BUSY_END;
lastError=fmt::sprintf("could not seek to beginning of file! (%s)",strerror(errno));
delete sample;
return NULL;
}
lenDivided=len/channels;
unsigned int samples=lenDivided;
switch (depth) {
case DIV_SAMPLE_DEPTH_1BIT:
case DIV_SAMPLE_DEPTH_1BIT_DPCM:
samples=lenDivided*8;
break;
case DIV_SAMPLE_DEPTH_YMZ_ADPCM:
case DIV_SAMPLE_DEPTH_QSOUND_ADPCM:
case DIV_SAMPLE_DEPTH_ADPCM_A:
case DIV_SAMPLE_DEPTH_ADPCM_B:
case DIV_SAMPLE_DEPTH_ADPCM_K:
case DIV_SAMPLE_DEPTH_VOX:
samples=lenDivided*2;
break;
case DIV_SAMPLE_DEPTH_IMA_ADPCM:
samples=(lenDivided-4)*2;
break;
case DIV_SAMPLE_DEPTH_8BIT:
case DIV_SAMPLE_DEPTH_MULAW:
case DIV_SAMPLE_DEPTH_C219:
samples=lenDivided;
break;
case DIV_SAMPLE_DEPTH_BRR:
samples=16*((lenDivided+8)/9);
break;
case DIV_SAMPLE_DEPTH_16BIT:
samples=(lenDivided+1)/2;
break;
default:
break;
}
if (samples>16777215) {
fclose(f);
BUSY_END;
lastError="this sample is too big! max sample size is 16777215.";
delete sample;
return NULL;
}
sample->rate=rate;
sample->centerRate=rate;
sample->depth=depth;
sample->init(samples);
unsigned char* buf=new unsigned char[len];
if (fread(buf,1,len,f)==0) {
fclose(f);
BUSY_END;
lastError=fmt::sprintf("could not read file! (%s)",strerror(errno));
delete[] buf;
delete sample;
return NULL;
}
fclose(f);
// import sample
size_t pos=0;
if (depth==DIV_SAMPLE_DEPTH_16BIT) {
for (unsigned int i=0; i<samples; i++) {
int accum=0;
for (int j=0; j<channels; j++) {
if (pos+1>=len) break;
if (bigEndian) {
accum+=(short)(((short)((buf[pos]<<8)|buf[pos+1]))^(unsign?0x8000:0));
} else {
accum+=(short)(((short)(buf[pos]|(buf[pos+1]<<8)))^(unsign?0x8000:0));
}
pos+=2;
}
accum/=channels;
sample->data16[i]=accum;
}
} else if (depth==DIV_SAMPLE_DEPTH_8BIT) {
for (unsigned int i=0; i<samples; i++) {
int accum=0;
for (int j=0; j<channels; j++) {
if (pos>=len) break;
accum+=(signed char)(buf[pos++]^(unsign?0x80:0));
}
accum/=channels;
sample->data8[i]=accum;
}
if (bigEndian) {
for (unsigned int i=0; (i+1)<samples; i+=2) {
sample->data8[i]^=sample->data8[i^1];
sample->data8[i^1]^=sample->data8[i];
sample->data8[i]^=sample->data8[i^1];
}
}
} else {
memcpy(sample->getCurBuf(),buf,len);
}
delete[] buf;
if (swapNibbles) {
unsigned char* b=(unsigned char*)sample->getCurBuf();
switch (depth) {
case DIV_SAMPLE_DEPTH_1BIT:
case DIV_SAMPLE_DEPTH_1BIT_DPCM:
// reverse bit order
for (unsigned int i=0; i<sample->getCurBufLen(); i++) {
b[i]=(
((b[i]&128)?1:0)|
((b[i]&64)?2:0)|
((b[i]&32)?4:0)|
((b[i]&16)?8:0)|
((b[i]&8)?16:0)|
((b[i]&4)?32:0)|
((b[i]&2)?64:0)|
((b[i]&1)?128:0)
);
}
break;
case DIV_SAMPLE_DEPTH_YMZ_ADPCM:
case DIV_SAMPLE_DEPTH_QSOUND_ADPCM:
case DIV_SAMPLE_DEPTH_ADPCM_A:
case DIV_SAMPLE_DEPTH_ADPCM_B:
case DIV_SAMPLE_DEPTH_ADPCM_K:
case DIV_SAMPLE_DEPTH_VOX:
// swap nibbles
for (unsigned int i=0; i<sample->getCurBufLen(); i++) {
b[i]=(b[i]<<4)|(b[i]>>4);
}
break;
case DIV_SAMPLE_DEPTH_MULAW:
// Namco to G.711
// Namco: smmmmxxx
// G.711: sxxxmmmm (^0xff)
for (unsigned int i=0; i<sample->getCurBufLen(); i++) {
b[i]=(((b[i]&7)<<4)|(((b[i]>>3)&15)^((b[i]&0x80)?15:0))|(b[i]&0x80))^0xff;
}
break;
default:
break;
}
}
BUSY_END;
return sample;
}
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