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minor changes to improve latency in aac playing base on 3a12cf2ad7.

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Test on Fortix even better than before.
This commit is contained in:
kaienfr 2014-04-12 11:53:20 +02:00
parent caa3cb9148
commit 5a8735d009
2 changed files with 8 additions and 5 deletions
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11
Core/HLE/sceMp4.cpp
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@ -322,14 +322,13 @@ u32 sceAacDecode(u32 id, u32 pcmAddr)
auto inbuff = Memory::GetPointer(ctx->AACBuf);
auto outbuf = Memory::GetPointer(ctx->PCMBuf);
memset(outbuf, 0, ctx->PCMBufSize);
u32 outpcmbufsize = 0;
// move inbuff to writePos of buffer
inbuff += ctx->writePos;
// decode frames in aacBuf and output into PCMBuf if it is not exceed
while (ctx->aacBufAvailable > 0 && outpcmbufsize < ctx->PCMBufSize){
// decode one frame in aacBuf and output into PCMBuf. Don't use while here, it could lead to latency in playing.
if (ctx->aacBufAvailable > 0){
int pcmframesize;
// decode
ctx->decoder->Decode(inbuff, ctx->aacBufAvailable, outbuf, &pcmframesize);
@ -340,7 +339,6 @@ u32 sceAacDecode(u32 id, u32 pcmAddr)
ctx->readPos -= ctx->aacBufAvailable;
}
ctx->aacBufAvailable = 0;
break;
}
// count total output pcm size
outpcmbufsize += pcmframesize;
@ -359,6 +357,11 @@ u32 sceAacDecode(u32 id, u32 pcmAddr)
Memory::Write_U32(ctx->PCMBuf, pcmAddr);
// if we have no output but readPos is not the end of audio stream, we will clear pcm outbuf and return nonzero value to continue.
if (outpcmbufsize == 0 && ctx->readPos < ctx->endPos){
memset(outbuf, 0, ctx->PCMBufSize);
return FF_INPUT_BUFFER_PADDING_SIZE;
}
return outpcmbufsize;
}