GUI: sample resampling
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tildearrow
parent
90a18611cd
commit
03cb910e93
6 changed files with 517 additions and 4 deletions
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@ -19,9 +19,10 @@
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#include "sample.h"
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#include "../ta-log.h"
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#include <math.h>
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#include <string.h>
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#include <sndfile.h>
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#include <math.h>
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#include "filter.h"
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extern "C" {
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#include "../../extern/adpcm/bs_codec.h"
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@ -178,6 +179,348 @@ bool DivSample::resize(unsigned int count) {
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return false;
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}
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#define RESAMPLE_BEGIN \
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if (samples<1) return true; \
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int finalCount=(double)samples*(r/(double)rate); \
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signed char* oldData8=data8; \
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short* oldData16=data16; \
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if (depth==16) { \
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if (data16!=NULL) { \
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data16=NULL; \
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initInternal(16,finalCount); \
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} \
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} else if (depth==8) { \
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if (data8!=NULL) { \
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data8=NULL; \
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initInternal(8,finalCount); \
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} \
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} else { \
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return false; \
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}
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#define RESAMPLE_END \
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samples=finalCount; \
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if (depth==16) { \
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delete[] oldData16; \
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} else if (depth==8) { \
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delete[] oldData8; \
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}
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bool DivSample::resampleNone(double r) {
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RESAMPLE_BEGIN;
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if (depth==16) {
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for (int i=0; i<finalCount; i++) {
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unsigned int pos=(unsigned int)((double)i*((double)rate/r));
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if (pos>=samples) {
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data16[i]=0;
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} else {
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data16[i]=oldData16[pos];
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}
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}
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} else if (depth==8) {
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for (int i=0; i<finalCount; i++) {
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unsigned int pos=(unsigned int)((double)i*((double)rate/r));
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if (pos>=samples) {
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data8[i]=0;
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} else {
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data8[i]=oldData8[pos];
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}
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}
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}
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rate=r;
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RESAMPLE_END;
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return true;
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}
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bool DivSample::resampleLinear(double r) {
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RESAMPLE_BEGIN;
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double posFrac=0;
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unsigned int posInt=0;
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double factor=(double)rate/r;
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if (depth==16) {
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for (int i=0; i<finalCount; i++) {
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short s1=(posInt>=samples)?0:oldData16[posInt];
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short s2=(posInt+1>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData16[loopStart]:0):oldData16[posInt+1];
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data16[i]=s1+(float)(s2-s1)*posFrac;
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posFrac+=factor;
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while (posFrac>=1.0) {
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posFrac-=1.0;
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posInt++;
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}
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}
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} else if (depth==8) {
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for (int i=0; i<finalCount; i++) {
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short s1=(posInt>=samples)?0:oldData8[posInt];
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short s2=(posInt+1>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData8[loopStart]:0):oldData8[posInt+1];
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data8[i]=s1+(float)(s2-s1)*posFrac;
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posFrac+=factor;
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while (posFrac>=1.0) {
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posFrac-=1.0;
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posInt++;
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}
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}
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}
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rate=r;
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RESAMPLE_END;
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return true;
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}
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bool DivSample::resampleCubic(double r) {
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RESAMPLE_BEGIN;
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double posFrac=0;
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unsigned int posInt=0;
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double factor=(double)rate/r;
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float* cubicTable=DivFilterTables::getCubicTable();
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if (depth==16) {
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for (int i=0; i<finalCount; i++) {
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unsigned int n=((unsigned int)(posFrac*1024.0))&1023;
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float* t=&cubicTable[n<<2];
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float s0=(posInt<1)?0:oldData16[posInt-1];
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float s1=(posInt>=samples)?0:oldData16[posInt];
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float s2=(posInt+1>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData16[loopStart]:0):oldData16[posInt+1];
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float s3=(posInt+2>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData16[loopStart]:0):oldData16[posInt+2];
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float result=s0*t[0]+s1*t[1]+s2*t[2]+s3*t[3];
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if (result<-32768) result=-32768;
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if (result>32767) result=32767;
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data16[i]=result;
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posFrac+=factor;
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while (posFrac>=1.0) {
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posFrac-=1.0;
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posInt++;
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}
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}
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} else if (depth==8) {
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for (int i=0; i<finalCount; i++) {
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unsigned int n=((unsigned int)(posFrac*1024.0))&1023;
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float* t=&cubicTable[n<<2];
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float s0=(posInt<1)?0:oldData8[posInt-1];
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float s1=(posInt>=samples)?0:oldData8[posInt];
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float s2=(posInt+1>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData8[loopStart]:0):oldData8[posInt+1];
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float s3=(posInt+2>=samples)?((loopStart>=0 && loopStart<(int)samples)?oldData8[loopStart]:0):oldData8[posInt+2];
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float result=s0*t[0]+s1*t[1]+s2*t[2]+s3*t[3];
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if (result<-128) result=-128;
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if (result>127) result=127;
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data8[i]=result;
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posFrac+=factor;
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while (posFrac>=1.0) {
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posFrac-=1.0;
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posInt++;
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}
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}
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}
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rate=r;
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RESAMPLE_END;
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return true;
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}
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bool DivSample::resampleBlep(double r) {
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RESAMPLE_BEGIN;
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double posFrac=0;
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unsigned int posInt=0;
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double factor=r/(double)rate;
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float* sincITable=DivFilterTables::getSincIntegralTable();
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float s[16];
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memset(s,0,16*sizeof(float));
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if (depth==16) {
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memset(data16,0,finalCount*sizeof(short));
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for (int i=0; i<finalCount; i++) {
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if (posInt<samples) {
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int result=data16[i]+oldData16[posInt];
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if (result<-32768) result=-32768;
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if (result>32767) result=32767;
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data16[i]=result;
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}
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posFrac+=1.0;
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while (posFrac>=1.0) {
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unsigned int n=((unsigned int)(posFrac*8192.0))&8191;
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posFrac-=factor;
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posInt++;
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float* t1=&sincITable[(8191-n)<<3];
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float* t2=&sincITable[n<<3];
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float delta=oldData16[posInt]-oldData16[posInt-1];
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for (int j=0; j<8; j++) {
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if (i-j>0) {
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float result=data16[i-j]+t1[j]*-delta;
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if (result<-32768) result=-32768;
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if (result>32767) result=32767;
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data16[i-j]=result;
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}
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if (i+j+1<finalCount) {
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float result=data16[i+j+1]+t2[j]*delta;
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if (result<-32768) result=-32768;
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if (result>32767) result=32767;
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data16[i+j+1]=result;
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}
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}
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}
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}
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} else if (depth==8) {
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memset(data8,0,finalCount*sizeof(short));
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for (int i=0; i<finalCount; i++) {
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if (posInt<samples) {
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int result=data8[i]+oldData8[posInt];
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if (result<-128) result=-128;
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if (result>127) result=127;
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data8[i]=result;
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}
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posFrac+=1.0;
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while (posFrac>=1.0) {
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unsigned int n=((unsigned int)(posFrac*8192.0))&8191;
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posFrac-=factor;
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posInt++;
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float* t1=&sincITable[(8191-n)<<3];
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float* t2=&sincITable[n<<3];
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float delta=oldData8[posInt]-oldData8[posInt-1];
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for (int j=0; j<8; j++) {
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if (i-j>0) {
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float result=data8[i-j]+t1[j]*-delta;
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if (result<-128) result=-128;
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if (result>127) result=127;
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data8[i-j]=result;
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}
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if (i+j+1<finalCount) {
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float result=data8[i+j+1]+t2[j]*delta;
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if (result<-128) result=-128;
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if (result>127) result=127;
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data8[i+j+1]=result;
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}
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}
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}
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}
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}
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rate=r;
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RESAMPLE_END;
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return true;
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}
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bool DivSample::resampleSinc(double r) {
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RESAMPLE_BEGIN;
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double posFrac=0;
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unsigned int posInt=0;
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double factor=(double)rate/r;
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float* sincTable=DivFilterTables::getSincTable();
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float s[16];
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memset(s,0,16*sizeof(float));
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if (depth==16) {
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for (int i=0; i<finalCount+8; i++) {
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unsigned int n=((unsigned int)(posFrac*8192.0))&8191;
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float result=0;
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float* t1=&sincTable[(8191-n)<<3];
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float* t2=&sincTable[n<<3];
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for (int j=0; j<8; j++) {
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result+=s[j]*t2[7-j];
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result+=s[8+j]*t1[j];
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}
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if (result<-32768) result=-32768;
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if (result>32767) result=32767;
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if (i>=8) {
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data16[i-8]=result;
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}
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posFrac+=factor;
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while (posFrac>=1.0) {
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posFrac-=1.0;
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posInt++;
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for (int j=0; j<15; j++) s[j]=s[j+1];
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s[15]=(posInt>=samples)?0:oldData16[posInt];
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}
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}
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} else if (depth==8) {
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for (int i=0; i<finalCount+8; i++) {
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unsigned int n=((unsigned int)(posFrac*8192.0))&8191;
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float result=0;
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float* t1=&sincTable[(8191-n)<<3];
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float* t2=&sincTable[n<<3];
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for (int j=0; j<8; j++) {
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result+=s[j]*t2[7-j];
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result+=s[8+j]*t1[j];
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}
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if (result<-32768) result=-32768;
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if (result>32767) result=32767;
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if (i>=8) {
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data8[i-8]=result;
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}
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posFrac+=factor;
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while (posFrac>=1.0) {
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posFrac-=1.0;
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posInt++;
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for (int j=0; j<15; j++) s[j]=s[j+1];
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s[15]=(posInt>=samples)?0:oldData8[posInt];
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}
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}
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}
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rate=r;
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RESAMPLE_END;
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return true;
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}
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bool DivSample::resample(double r, int filter) {
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if (depth!=8 && depth!=16) return false;
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switch (filter) {
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case DIV_RESAMPLE_NONE:
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return resampleNone(r);
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break;
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case DIV_RESAMPLE_LINEAR:
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return resampleLinear(r);
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break;
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case DIV_RESAMPLE_CUBIC:
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return resampleCubic(r);
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break;
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case DIV_RESAMPLE_BLEP:
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return resampleBlep(r);
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break;
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case DIV_RESAMPLE_SINC:
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return resampleSinc(r);
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break;
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case DIV_RESAMPLE_BEST:
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if (r>rate) {
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return resampleSinc(r);
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} else {
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return resampleBlep(r);
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}
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break;
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}
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return false;
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}
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void DivSample::render() {
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// step 1: convert to 16-bit if needed
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if (depth!=16) {
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