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prepare BRR encoding/decoding

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tildearrow 2022-09-24 04:27:53 -05:00
parent b7e618e91d
commit 8eaddcf070
6 changed files with 158 additions and 4 deletions
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14
src/engine/platform/snes.cpp
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@ -24,7 +24,7 @@
#define CHIP_FREQBASE 131072
#define rWrite(a,v) {dsp.write(a,v); regPool[(a)&0x7f]=v; }
#define rWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
#define chWrite(c,a,v) {rWrite((a)+(c)*16,v)}
#define sampleTableAddr(c) (sampleTableBase+(c)*4)
#define waveTableAddr(c) (sampleTableBase+8*4+(c)*9*16)
@ -69,6 +69,14 @@ void DivPlatformSNES::acquire(short* bufL, short* bufR, size_t start, size_t len
short out[2];
short chOut[16];
for (size_t h=start; h<start+len; h++) {
// TODO: delay
if (!writes.empty()) {
QueuedWrite w=writes.front();
dsp.write(w.addr,w.val);
regPool[w.addr&0x7f]=w.val;
writes.pop();
}
dsp.set_output(out,1);
dsp.run(32);
dsp.get_voice_outputs(chOut);
@ -407,7 +415,9 @@ void DivPlatformSNES::reset() {
dsp.set_output(NULL,0);
memset(regPool,0,128);
// TODO more initial values
sampleTableBase=0x100; // hack: this can't be 0 or channel 1 won't play??
// this can't be 0 or channel 1 won't play
// this can't be 0x100 either as that's used by SPC700 page 1 and the stack
sampleTableBase=0x200;
rWrite(0x5d,sampleTableBase>>8);
rWrite(0x0c,127); // global volume left
rWrite(0x1c,127); // global volume right