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SNES: add an option to not encode BRR with unstable filters

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This is useful for seeking to anywhere within the sample using sample offset commands
This commit is contained in:
Natt Akuma 2024-06-22 14:37:00 +07:00
parent 6a7e7ba571
commit bdc66ae33e
9 changed files with 40 additions and 16 deletions
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9
src/engine/brrUtils.c
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@ -138,7 +138,7 @@ void brrEncodeBlock(const short* buf, unsigned char* out, unsigned char range, u
}
}
long brrEncode(short* buf, unsigned char* out, long len, long loopStart, unsigned char emphasis) {
long brrEncode(short* buf, unsigned char* out, long len, long loopStart, unsigned char emphasis, unsigned char noFilter) {
if (len==0) return 0;
// encoding process:
@ -157,6 +157,7 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart, unsigne
long total=0;
unsigned char filter=0;
unsigned char range=0;
unsigned char numFilters=noFilter?2:4;
short x0=0;
short x1=0;
@ -211,7 +212,7 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart, unsigne
}
// encode
for (int j=0; j<4; j++) {
for (int j=0; j<numFilters; j++) {
for (int k=0; k<13; k++) {
brrEncodeBlock(in,possibleOut[j][k],k,j,&last1[j][k],&last2[j][k],&avgError[j][k]);
}
@ -228,7 +229,7 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart, unsigne
}
}
} else {
for (int j=0; j<4; j++) {
for (int j=0; j<numFilters; j++) {
for (int k=0; k<13; k++) {
if (avgError[j][k]<candError) {
candError=avgError[j][k];
@ -245,7 +246,7 @@ long brrEncode(short* buf, unsigned char* out, long len, long loopStart, unsigne
out[j+1]=possibleOut[filter][range][j];
}
for (int j=0; j<4; j++) {
for (int j=0; j<numFilters; j++) {
for (int k=0; k<13; k++) {
last1[j][k]=last1[filter][range];
last2[j][k]=last2[filter][range];