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furnace/src/engine/sample.cpp

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/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2022 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 "sample.h"
#include "../ta-log.h"
#include <math.h>
#include <string.h>
#ifdef HAVE_SNDFILE
#include "sfWrapper.h"
#endif
#include "filter.h"
extern "C" {
#include "../../extern/adpcm/bs_codec.h"
#include "../../extern/adpcm/oki_codec.h"
#include "../../extern/adpcm/yma_codec.h"
#include "../../extern/adpcm/ymb_codec.h"
#include "../../extern/adpcm/ymz_codec.h"
}
DivSampleHistory::~DivSampleHistory() {
if (data!=NULL) delete[] data;
}
bool DivSample::isLoopable() {
return (loopStart>=0 && loopStart<loopEnd) && (loopEnd>loopStart && loopEnd<=(int)samples);
}
unsigned int DivSample::getEndPosition(DivSampleDepth depth) {
int end=loopEnd;
unsigned int len=samples;
switch (depth) {
case DIV_SAMPLE_DEPTH_1BIT:
end=(loopEnd+7)/8;
len=length1;
break;
case DIV_SAMPLE_DEPTH_1BIT_DPCM:
end=(loopEnd+7)/8;
len=lengthDPCM;
break;
case DIV_SAMPLE_DEPTH_YMZ_ADPCM:
end=(loopEnd+1)/2;
len=lengthZ;
break;
case DIV_SAMPLE_DEPTH_QSOUND_ADPCM:
end=(loopEnd+1)/2;
len=lengthQSoundA;
break;
case DIV_SAMPLE_DEPTH_ADPCM_A:
end=(loopEnd+1)/2;
len=lengthA;
break;
case DIV_SAMPLE_DEPTH_ADPCM_B:
end=(loopEnd+1)/2;
len=lengthB;
break;
case DIV_SAMPLE_DEPTH_8BIT:
end=loopEnd;
len=length8;
break;
case DIV_SAMPLE_DEPTH_BRR:
end=9*((loopEnd+15)/16);
len=lengthBRR;
break;
case DIV_SAMPLE_DEPTH_VOX:
end=(loopEnd+1)/2;
len=lengthVOX;
break;
case DIV_SAMPLE_DEPTH_16BIT:
end=loopEnd*2;
len=length16;
break;
default:
break;
}
return isLoopable()?end:len;
}
void DivSample::setSampleCount(unsigned int count) {
samples=count;
if ((!isLoopable()) || loopEnd<0 || loopEnd>(int)samples) loopEnd=samples;
}
bool DivSample::save(const char* path) {
#ifndef HAVE_SNDFILE
logE("Furnace was not compiled with libsndfile!");
return false;
#else
SNDFILE* f;
SF_INFO si;
SFWrapper sfWrap;
memset(&si,0,sizeof(SF_INFO));
if (length16<1) return false;
si.channels=1;
si.samplerate=rate;
switch (depth) {
case DIV_SAMPLE_DEPTH_8BIT: // 8-bit
si.format=SF_FORMAT_PCM_U8|SF_FORMAT_WAV;
break;
default: // 16-bit
si.format=SF_FORMAT_PCM_16|SF_FORMAT_WAV;
break;
}
f=sfWrap.doOpen(path,SFM_WRITE,&si);
if (f==NULL) {
logE("could not open wave file for saving! %s",sf_error_number(sf_error(f)));
return false;
}
SF_INSTRUMENT inst;
memset(&inst, 0, sizeof(inst));
inst.gain = 1;
short pitch = (0x3c * 100) + 50 - (log2((double)centerRate/rate) * 12.0 * 100.0);
inst.basenote = pitch / 100;
inst.detune = 50 - (pitch % 100);
inst.velocity_hi = 0x7f;
inst.key_hi = 0x7f;
if(isLoopable())
{
inst.loop_count = 1;
inst.loops[0].mode = SF_LOOP_FORWARD;
inst.loops[0].start = loopStart;
inst.loops[0].end = loopEnd;
}
sf_command(f, SFC_SET_INSTRUMENT, &inst, sizeof(inst));
switch (depth) {
case DIV_SAMPLE_DEPTH_8BIT: {
// convert from signed to unsigned
unsigned char* buf=new unsigned char[length8];
for (size_t i=0; i<length8; i++) {
buf[i]=data8[i]^0x80;
}
sf_write_raw(f,buf,length8);
delete[] buf;
break;
}
default:
sf_write_raw(f,data16,length16);
break;
}
sfWrap.doClose();
return true;
#endif
}
// 16-bit memory is padded to 512, to make things easier for ADPCM-A/B.
bool DivSample::initInternal(DivSampleDepth d, int count) {
switch (d) {
case DIV_SAMPLE_DEPTH_1BIT: // 1-bit
if (data1!=NULL) delete[] data1;
length1=(count+7)/8;
data1=new unsigned char[length1];
memset(data1,0,length1);
break;
case DIV_SAMPLE_DEPTH_1BIT_DPCM: // DPCM
if (dataDPCM!=NULL) delete[] dataDPCM;
lengthDPCM=(count+7)/8;
dataDPCM=new unsigned char[lengthDPCM];
memset(dataDPCM,0,lengthDPCM);
break;
case DIV_SAMPLE_DEPTH_YMZ_ADPCM: // YMZ ADPCM
if (dataZ!=NULL) delete[] dataZ;
lengthZ=(count+1)/2;
// for padding AICA sample
dataZ=new unsigned char[(lengthZ+3)&(~0x03)];
memset(dataZ,0,(lengthZ+3)&(~0x03));
break;
case DIV_SAMPLE_DEPTH_QSOUND_ADPCM: // QSound ADPCM
if (dataQSoundA!=NULL) delete[] dataQSoundA;
lengthQSoundA=(count+1)/2;
dataQSoundA=new unsigned char[lengthQSoundA];
memset(dataQSoundA,0,lengthQSoundA);
break;
case DIV_SAMPLE_DEPTH_ADPCM_A: // ADPCM-A
if (dataA!=NULL) delete[] dataA;
lengthA=(count+1)/2;
dataA=new unsigned char[(lengthA+255)&(~0xff)];
memset(dataA,0,(lengthA+255)&(~0xff));
break;
case DIV_SAMPLE_DEPTH_ADPCM_B: // ADPCM-B
if (dataB!=NULL) delete[] dataB;
lengthB=(count+1)/2;
dataB=new unsigned char[(lengthB+255)&(~0xff)];
memset(dataB,0,(lengthB+255)&(~0xff));
break;
case DIV_SAMPLE_DEPTH_8BIT: // 8-bit
if (data8!=NULL) delete[] data8;
length8=count;
// for padding X1-010 sample
data8=new signed char[(count+4095)&(~0xfff)];
memset(data8,0,(count+4095)&(~0xfff));
break;
case DIV_SAMPLE_DEPTH_BRR: // BRR
if (dataBRR!=NULL) delete[] dataBRR;
lengthBRR=9*((count+15)/16);
dataBRR=new unsigned char[lengthBRR];
memset(dataBRR,0,lengthBRR);
break;
case DIV_SAMPLE_DEPTH_VOX: // VOX
if (dataVOX!=NULL) delete[] dataVOX;
lengthVOX=(count+1)/2;
dataVOX=new unsigned char[lengthVOX];
memset(dataVOX,0,lengthVOX);
break;
case DIV_SAMPLE_DEPTH_16BIT: // 16-bit
if (data16!=NULL) delete[] data16;
length16=count*2;
data16=new short[(count+511)&(~0x1ff)];
memset(data16,0,((count+511)&(~0x1ff))*sizeof(short));
break;
default:
return false;
}
return true;
}
bool DivSample::init(unsigned int count) {
if (!initInternal(depth,count)) return false;
setSampleCount(count);
return true;
}
bool DivSample::resize(unsigned int count) {
if (depth==DIV_SAMPLE_DEPTH_8BIT) {
if (data8!=NULL) {
signed char* oldData8=data8;
data8=NULL;
initInternal(DIV_SAMPLE_DEPTH_8BIT,count);
memcpy(data8,oldData8,MIN(count,samples));
delete[] oldData8;
} else {
initInternal(DIV_SAMPLE_DEPTH_8BIT,count);
}
setSampleCount(count);
return true;
} else if (depth==DIV_SAMPLE_DEPTH_16BIT) {
if (data16!=NULL) {
short* oldData16=data16;
data16=NULL;
initInternal(DIV_SAMPLE_DEPTH_16BIT,count);
memcpy(data16,oldData16,sizeof(short)*MIN(count,samples));
delete[] oldData16;
} else {
initInternal(DIV_SAMPLE_DEPTH_16BIT,count);
}
setSampleCount(count);
return true;
}
return false;
}
bool DivSample::strip(unsigned int begin, unsigned int end) {
if (begin>samples) begin=samples;
if (end>samples) end=samples;
int count=samples-(end-begin);
if (count<=0) return resize(0);
if (depth==DIV_SAMPLE_DEPTH_8BIT) {
if (data8!=NULL) {
signed char* oldData8=data8;
data8=NULL;
initInternal(DIV_SAMPLE_DEPTH_8BIT,count);
if (begin>0) {
memcpy(data8,oldData8,begin);
}
if (samples-end>0) {
memcpy(data8+begin,oldData8+end,samples-end);
}
delete[] oldData8;
} else {
// do nothing
return true;
}
setSampleCount(count);
return true;
} else if (depth==DIV_SAMPLE_DEPTH_16BIT) {
if (data16!=NULL) {
short* oldData16=data16;
data16=NULL;
initInternal(DIV_SAMPLE_DEPTH_16BIT,count);
if (begin>0) {
memcpy(data16,oldData16,sizeof(short)*begin);
}
if (samples-end>0) {
memcpy(&(data16[begin]),&(oldData16[end]),sizeof(short)*(samples-end));
}
delete[] oldData16;
} else {
// do nothing
return true;
}
setSampleCount(count);
return true;
}
return false;
}
bool DivSample::trim(unsigned int begin, unsigned int end) {
int count=end-begin;
if (count==0) return true;
if (begin==0 && end==samples) return true;
if (depth==DIV_SAMPLE_DEPTH_8BIT) {
if (data8!=NULL) {
signed char* oldData8=data8;
data8=NULL;
initInternal(DIV_SAMPLE_DEPTH_8BIT,count);
memcpy(data8,oldData8+begin,count);
delete[] oldData8;
} else {
// do nothing
return true;
}
setSampleCount(count);
return true;
} else if (depth==DIV_SAMPLE_DEPTH_16BIT) {
if (data16!=NULL) {
short* oldData16=data16;
data16=NULL;
initInternal(DIV_SAMPLE_DEPTH_16BIT,count);
memcpy(data16,&(oldData16[begin]),sizeof(short)*count);
delete[] oldData16;
} else {
// do nothing
return true;
}
setSampleCount(count);
return true;
}
return false;
}
bool DivSample::insert(unsigned int pos, unsigned int length) {
unsigned int count=samples+length;
if (depth==DIV_SAMPLE_DEPTH_8BIT) {
if (data8!=NULL) {
signed char* oldData8=data8;
data8=NULL;
initInternal(DIV_SAMPLE_DEPTH_8BIT,count);
if (pos>0) {
memcpy(data8,oldData8,pos);
}
if (count-pos-length>0) {
memcpy(data8+pos+length,oldData8+pos,count-pos-length);
}
delete[] oldData8;
} else {
initInternal(DIV_SAMPLE_DEPTH_8BIT,count);
}
setSampleCount(count);
return true;
} else if (depth==DIV_SAMPLE_DEPTH_16BIT) {
if (data16!=NULL) {
short* oldData16=data16;
data16=NULL;
initInternal(DIV_SAMPLE_DEPTH_16BIT,count);
if (pos>0) {
memcpy(data16,oldData16,sizeof(short)*pos);
}
if (count-pos-length>0) {
memcpy(&(data16[pos+length]),&(oldData16[pos]),sizeof(short)*(count-pos-length));
}
delete[] oldData16;
} else {
initInternal(DIV_SAMPLE_DEPTH_16BIT,count);
}
setSampleCount(count);
return true;
}
return false;
}
#define RESAMPLE_BEGIN \
if (samples<1) return true; \
int finalCount=(double)samples*(r/(double)rate); \
signed char* oldData8=data8; \
short* oldData16=data16; \
if (depth==DIV_SAMPLE_DEPTH_16BIT) { \
if (data16!=NULL) { \
data16=NULL; \
initInternal(DIV_SAMPLE_DEPTH_16BIT,finalCount); \
} \
} else if (depth==DIV_SAMPLE_DEPTH_8BIT) { \
if (data8!=NULL) { \
data8=NULL; \
initInternal(DIV_SAMPLE_DEPTH_8BIT,finalCount); \
} \
} else { \
return false; \
}
#define RESAMPLE_END \
if (loopStart>=0) loopStart=(double)loopStart*(r/(double)rate); \
if (loopEnd>=0) loopEnd=(double)loopEnd*(r/(double)rate); \
centerRate=(int)((double)centerRate*(r/(double)rate)); \
rate=r; \
samples=finalCount; \
if (depth==DIV_SAMPLE_DEPTH_16BIT) { \
delete[] oldData16; \
} else if (depth==DIV_SAMPLE_DEPTH_8BIT) { \
delete[] oldData8; \
}
bool DivSample::resampleNone(double r) {
RESAMPLE_BEGIN;
if (depth==DIV_SAMPLE_DEPTH_16BIT) {
for (int i=0; i<finalCount; i++) {
unsigned int pos=(unsigned int)((double)i*((double)rate/r));
if (pos>=samples) {
data16[i]=0;
} else {
data16[i]=oldData16[pos];
}
}
} else if (depth==DIV_SAMPLE_DEPTH_8BIT) {
for (int i=0; i<finalCount; i++) {
unsigned int pos=(unsigned int)((double)i*((double)rate/r));
if (pos>=samples) {
data8[i]=0;
} else {
data8[i]=oldData8[pos];
}
}
}
RESAMPLE_END;
return true;
}
bool DivSample::resampleLinear(double r) {
RESAMPLE_BEGIN;
double posFrac=0;
unsigned int posInt=0;
double factor=(double)rate/r;
if (depth==DIV_SAMPLE_DEPTH_16BIT) {
for (int i=0; i<finalCount; i++) {
short s1=(posInt>=samples)?0:oldData16[posInt];
short s2=(posInt+1>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData16[loopStart]:0):oldData16[posInt+1];
data16[i]=s1+(float)(s2-s1)*posFrac;
posFrac+=factor;
while (posFrac>=1.0) {
posFrac-=1.0;
posInt++;
}
}
} else if (depth==DIV_SAMPLE_DEPTH_8BIT) {
for (int i=0; i<finalCount; i++) {
short s1=(posInt>=samples)?0:oldData8[posInt];
short s2=(posInt+1>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData8[loopStart]:0):oldData8[posInt+1];
data8[i]=s1+(float)(s2-s1)*posFrac;
posFrac+=factor;
while (posFrac>=1.0) {
posFrac-=1.0;
posInt++;
}
}
}
RESAMPLE_END;
return true;
}
bool DivSample::resampleCubic(double r) {
RESAMPLE_BEGIN;
double posFrac=0;
unsigned int posInt=0;
double factor=(double)rate/r;
float* cubicTable=DivFilterTables::getCubicTable();
if (depth==DIV_SAMPLE_DEPTH_16BIT) {
for (int i=0; i<finalCount; i++) {
unsigned int n=((unsigned int)(posFrac*1024.0))&1023;
float* t=&cubicTable[n<<2];
float s0=(posInt<1)?0:oldData16[posInt-1];
float s1=(posInt>=samples)?0:oldData16[posInt];
float s2=(posInt+1>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData16[loopStart]:0):oldData16[posInt+1];
float s3=(posInt+2>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData16[loopStart]:0):oldData16[posInt+2];
float result=s0*t[0]+s1*t[1]+s2*t[2]+s3*t[3];
if (result<-32768) result=-32768;
if (result>32767) result=32767;
data16[i]=result;
posFrac+=factor;
while (posFrac>=1.0) {
posFrac-=1.0;
posInt++;
}
}
} else if (depth==DIV_SAMPLE_DEPTH_8BIT) {
for (int i=0; i<finalCount; i++) {
unsigned int n=((unsigned int)(posFrac*1024.0))&1023;
float* t=&cubicTable[n<<2];
float s0=(posInt<1)?0:oldData8[posInt-1];
float s1=(posInt>=samples)?0:oldData8[posInt];
float s2=(posInt+1>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData8[loopStart]:0):oldData8[posInt+1];
float s3=(posInt+2>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData8[loopStart]:0):oldData8[posInt+2];
float result=s0*t[0]+s1*t[1]+s2*t[2]+s3*t[3];
if (result<-128) result=-128;
if (result>127) result=127;
data8[i]=result;
posFrac+=factor;
while (posFrac>=1.0) {
posFrac-=1.0;
posInt++;
}
}
}
RESAMPLE_END;
return true;
}
bool DivSample::resampleBlep(double r) {
RESAMPLE_BEGIN;
double posFrac=0;
unsigned int posInt=0;
double factor=r/(double)rate;
float* sincITable=DivFilterTables::getSincIntegralTable();
float s[16];
memset(s,0,16*sizeof(float));
if (depth==DIV_SAMPLE_DEPTH_16BIT) {
memset(data16,0,finalCount*sizeof(short));
for (int i=0; i<finalCount; i++) {
if (posInt<samples) {
int result=data16[i]+oldData16[posInt];
if (result<-32768) result=-32768;
if (result>32767) result=32767;
data16[i]=result;
}
posFrac+=1.0;
while (posFrac>=1.0) {
unsigned int n=((unsigned int)(posFrac*8192.0))&8191;
posFrac-=factor;
posInt++;
float* t1=&sincITable[(8191-n)<<3];
float* t2=&sincITable[n<<3];
float delta=oldData16[posInt]-oldData16[posInt-1];
for (int j=0; j<8; j++) {
if (i-j>0) {
float result=data16[i-j]+t1[j]*-delta;
if (result<-32768) result=-32768;
if (result>32767) result=32767;
data16[i-j]=result;
}
if (i+j+1<finalCount) {
float result=data16[i+j+1]+t2[j]*delta;
if (result<-32768) result=-32768;
if (result>32767) result=32767;
data16[i+j+1]=result;
}
}
}
}
} else if (depth==DIV_SAMPLE_DEPTH_8BIT) {
memset(data8,0,finalCount);
for (int i=0; i<finalCount; i++) {
if (posInt<samples) {
int result=data8[i]+oldData8[posInt];
if (result<-128) result=-128;
if (result>127) result=127;
data8[i]=result;
}
posFrac+=1.0;
while (posFrac>=1.0) {
unsigned int n=((unsigned int)(posFrac*8192.0))&8191;
posFrac-=factor;
posInt++;
float* t1=&sincITable[(8191-n)<<3];
float* t2=&sincITable[n<<3];
float delta=oldData8[posInt]-oldData8[posInt-1];
for (int j=0; j<8; j++) {
if (i-j>0) {
float result=data8[i-j]+t1[j]*-delta;
if (result<-128) result=-128;
if (result>127) result=127;
data8[i-j]=result;
}
if (i+j+1<finalCount) {
float result=data8[i+j+1]+t2[j]*delta;
if (result<-128) result=-128;
if (result>127) result=127;
data8[i+j+1]=result;
}
}
}
}
}
RESAMPLE_END;
return true;
}
bool DivSample::resampleSinc(double r) {
RESAMPLE_BEGIN;
double posFrac=0;
unsigned int posInt=0;
double factor=(double)rate/r;
float* sincTable=DivFilterTables::getSincTable();
float s[16];
memset(s,0,16*sizeof(float));
if (depth==DIV_SAMPLE_DEPTH_16BIT) {
for (int i=0; i<finalCount+8; i++) {
unsigned int n=((unsigned int)(posFrac*8192.0))&8191;
float result=0;
float* t1=&sincTable[(8191-n)<<3];
float* t2=&sincTable[n<<3];
for (int j=0; j<8; j++) {
result+=s[j]*t2[7-j];
result+=s[8+j]*t1[j];
}
if (result<-32768) result=-32768;
if (result>32767) result=32767;
if (i>=8) {
data16[i-8]=result;
}
posFrac+=factor;
while (posFrac>=1.0) {
posFrac-=1.0;
posInt++;
for (int j=0; j<15; j++) s[j]=s[j+1];
s[15]=(posInt>=samples)?0:oldData16[posInt];
}
}
} else if (depth==DIV_SAMPLE_DEPTH_8BIT) {
for (int i=0; i<finalCount+8; i++) {
unsigned int n=((unsigned int)(posFrac*8192.0))&8191;
float result=0;
float* t1=&sincTable[(8191-n)<<3];
float* t2=&sincTable[n<<3];
for (int j=0; j<8; j++) {
result+=s[j]*t2[7-j];
result+=s[8+j]*t1[j];
}
if (result<-128) result=-128;
if (result>127) result=127;
if (i>=8) {
data8[i-8]=result;
}
posFrac+=factor;
while (posFrac>=1.0) {
posFrac-=1.0;
posInt++;
for (int j=0; j<15; j++) s[j]=s[j+1];
s[15]=(posInt>=samples)?0:oldData8[posInt];
}
}
}
RESAMPLE_END;
return true;
}
bool DivSample::resample(double r, int filter) {
if (depth!=DIV_SAMPLE_DEPTH_8BIT && depth!=DIV_SAMPLE_DEPTH_16BIT) return false;
switch (filter) {
case DIV_RESAMPLE_NONE:
return resampleNone(r);
break;
case DIV_RESAMPLE_LINEAR:
return resampleLinear(r);
break;
case DIV_RESAMPLE_CUBIC:
return resampleCubic(r);
break;
case DIV_RESAMPLE_BLEP:
return resampleBlep(r);
break;
case DIV_RESAMPLE_SINC:
return resampleSinc(r);
break;
case DIV_RESAMPLE_BEST:
if (r>rate) {
return resampleSinc(r);
} else {
return resampleBlep(r);
}
break;
}
return false;
}
void DivSample::render() {
// step 1: convert to 16-bit if needed
if (depth!=DIV_SAMPLE_DEPTH_16BIT) {
if (!initInternal(DIV_SAMPLE_DEPTH_16BIT,samples)) return;
switch (depth) {
case DIV_SAMPLE_DEPTH_1BIT: // 1-bit
for (unsigned int i=0; i<samples; i++) {
data16[i]=((data1[i>>3]>>(i&7))&1)?0x7fff:-0x7fff;
}
break;
case DIV_SAMPLE_DEPTH_1BIT_DPCM: { // DPCM
int accum=0;
for (unsigned int i=0; i<samples; i++) {
accum+=((dataDPCM[i>>3]>>(i&7))&1)?1:-1;
if (accum>63) accum=63;
if (accum<-64) accum=-64;
data16[i]=accum*512;
}
break;
}
case DIV_SAMPLE_DEPTH_YMZ_ADPCM: // YMZ ADPCM
ymz_decode(dataZ,data16,samples);
break;
case DIV_SAMPLE_DEPTH_QSOUND_ADPCM: // QSound ADPCM
bs_decode(dataQSoundA,data16,samples);
break;
case DIV_SAMPLE_DEPTH_ADPCM_A: // ADPCM-A
yma_decode(dataA,data16,samples);
break;
case DIV_SAMPLE_DEPTH_ADPCM_B: // ADPCM-B
ymb_decode(dataB,data16,samples);
break;
case DIV_SAMPLE_DEPTH_8BIT: // 8-bit PCM
for (unsigned int i=0; i<samples; i++) {
data16[i]=data8[i]<<8;
}
break;
case DIV_SAMPLE_DEPTH_BRR: // BRR
// TODO!
break;
case DIV_SAMPLE_DEPTH_VOX: // VOX
oki_decode(dataVOX,data16,samples);
break;
default:
return;
}
}
// step 2: render to other formats
if (depth!=DIV_SAMPLE_DEPTH_1BIT) { // 1-bit
if (!initInternal(DIV_SAMPLE_DEPTH_1BIT,samples)) return;
for (unsigned int i=0; i<samples; i++) {
if (data16[i]>0) {
data1[i>>3]|=1<<(i&7);
}
}
}
if (depth!=DIV_SAMPLE_DEPTH_1BIT_DPCM) { // DPCM
if (!initInternal(DIV_SAMPLE_DEPTH_1BIT_DPCM,samples)) return;
int accum=63;
for (unsigned int i=0; i<samples; i++) {
int next=((unsigned short)(data16[i]^0x8000))>>9;
if (next>accum) {
dataDPCM[i>>3]|=1<<(i&7);
accum++;
} else {
accum--;
}
if (accum<0) accum=0;
if (accum>127) accum=127;
}
}
if (depth!=DIV_SAMPLE_DEPTH_YMZ_ADPCM) { // YMZ ADPCM
if (!initInternal(DIV_SAMPLE_DEPTH_YMZ_ADPCM,samples)) return;
ymz_encode(data16,dataZ,(samples+7)&(~0x7));
}
if (depth!=DIV_SAMPLE_DEPTH_QSOUND_ADPCM) { // QSound ADPCM
if (!initInternal(DIV_SAMPLE_DEPTH_QSOUND_ADPCM,samples)) return;
bs_encode(data16,dataQSoundA,samples);
}
// TODO: pad to 256.
if (depth!=DIV_SAMPLE_DEPTH_ADPCM_A) { // ADPCM-A
if (!initInternal(DIV_SAMPLE_DEPTH_ADPCM_A,samples)) return;
yma_encode(data16,dataA,(samples+511)&(~0x1ff));
}
if (depth!=DIV_SAMPLE_DEPTH_ADPCM_B) { // ADPCM-B
if (!initInternal(DIV_SAMPLE_DEPTH_ADPCM_B,samples)) return;
ymb_encode(data16,dataB,(samples+511)&(~0x1ff));
}
if (depth!=DIV_SAMPLE_DEPTH_8BIT) { // 8-bit PCM
if (!initInternal(DIV_SAMPLE_DEPTH_8BIT,samples)) return;
for (unsigned int i=0; i<samples; i++) {
data8[i]=data16[i]>>8;
}
}
// TODO: BRR!
if (depth!=DIV_SAMPLE_DEPTH_VOX) { // VOX
if (!initInternal(DIV_SAMPLE_DEPTH_VOX,samples)) return;
oki_encode(data16,dataVOX,samples);
}
}
void* DivSample::getCurBuf() {
switch (depth) {
case DIV_SAMPLE_DEPTH_1BIT:
return data1;
case DIV_SAMPLE_DEPTH_1BIT_DPCM:
return dataDPCM;
case DIV_SAMPLE_DEPTH_YMZ_ADPCM:
return dataZ;
case DIV_SAMPLE_DEPTH_QSOUND_ADPCM:
return dataQSoundA;
case DIV_SAMPLE_DEPTH_ADPCM_A:
return dataA;
case DIV_SAMPLE_DEPTH_ADPCM_B:
return dataB;
case DIV_SAMPLE_DEPTH_8BIT:
return data8;
case DIV_SAMPLE_DEPTH_BRR:
return dataBRR;
case DIV_SAMPLE_DEPTH_VOX:
return dataVOX;
case DIV_SAMPLE_DEPTH_16BIT:
return data16;
default:
return NULL;
}
return NULL;
}
unsigned int DivSample::getCurBufLen() {
switch (depth) {
case DIV_SAMPLE_DEPTH_1BIT:
return length1;
case DIV_SAMPLE_DEPTH_1BIT_DPCM:
return lengthDPCM;
case DIV_SAMPLE_DEPTH_YMZ_ADPCM:
return lengthZ;
case DIV_SAMPLE_DEPTH_QSOUND_ADPCM:
return lengthQSoundA;
case DIV_SAMPLE_DEPTH_ADPCM_A:
return lengthA;
case DIV_SAMPLE_DEPTH_ADPCM_B:
return lengthB;
case DIV_SAMPLE_DEPTH_8BIT:
return length8;
case DIV_SAMPLE_DEPTH_BRR:
return lengthBRR;
case DIV_SAMPLE_DEPTH_VOX:
return lengthVOX;
case DIV_SAMPLE_DEPTH_16BIT:
return length16;
default:
return 0;
}
return 0;
}
DivSampleHistory* DivSample::prepareUndo(bool data, bool doNotPush) {
DivSampleHistory* h;
if (data) {
unsigned char* duplicate;
if (getCurBuf()==NULL) {
duplicate=NULL;
} else {
duplicate=new unsigned char[getCurBufLen()];
memcpy(duplicate,getCurBuf(),getCurBufLen());
}
h=new DivSampleHistory(duplicate,getCurBufLen(),samples,depth,rate,centerRate,loopStart,loopEnd);
} else {
h=new DivSampleHistory(depth,rate,centerRate,loopStart,loopEnd);
}
if (!doNotPush) {
while (!redoHist.empty()) {
DivSampleHistory* h=redoHist.back();
delete h;
redoHist.pop_back();
}
if (undoHist.size()>100) undoHist.pop_front();
undoHist.push_back(h);
}
return h;
}
#define applyHistory \
depth=h->depth; \
if (h->hasSample) { \
initInternal(h->depth,h->samples); \
samples=h->samples; \
\
if (h->length!=getCurBufLen()) logW("undo buffer length not equal to current buffer length! %d != %d",h->length,getCurBufLen()); \
\
void* buf=getCurBuf(); \
\
if (buf!=NULL && h->data!=NULL) { \
memcpy(buf,h->data,h->length); \
} \
} \
rate=h->rate; \
centerRate=h->centerRate; \
loopStart=h->loopStart; \
loopEnd=h->loopEnd;
int DivSample::undo() {
if (undoHist.empty()) return 0;
DivSampleHistory* h=undoHist.back();
DivSampleHistory* redo=prepareUndo(h->hasSample,true);
int ret=h->hasSample?2:1;
applyHistory;
redoHist.push_back(redo);
delete h;
undoHist.pop_back();
return ret;
}
int DivSample::redo() {
if (redoHist.empty()) return 0;
DivSampleHistory* h=redoHist.back();
DivSampleHistory* undo=prepareUndo(h->hasSample,true);
int ret=h->hasSample?2:1;
applyHistory;
undoHist.push_back(undo);
delete h;
redoHist.pop_back();
return ret;
}
DivSample::~DivSample() {
while (!undoHist.empty()) {
DivSampleHistory* h=undoHist.back();
delete h;
undoHist.pop_back();
}
while (!redoHist.empty()) {
DivSampleHistory* h=redoHist.back();
delete h;
redoHist.pop_back();
}
if (data8) delete[] data8;
if (data16) delete[] data16;
if (data1) delete[] data1;
if (dataDPCM) delete[] dataDPCM;
if (dataZ) delete[] dataZ;
if (dataQSoundA) delete[] dataQSoundA;
if (dataA) delete[] dataA;
if (dataB) delete[] dataB;
if (dataBRR) delete[] dataBRR;
if (dataVOX) delete[] dataVOX;
}
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