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Mp3: Correct sceMp3GetMaxOutputSample.

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Was based on output buffer size, rather than frame size, before.

Fixes choppy audio in Velocity.
This commit is contained in:
Unknown W. Brackets 2019-04-24 14:31:12 -07:00
parent be6710ea4a
commit 0d6570e8ad
3 changed files with 22 additions and 7 deletions
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26
Core/HLE/sceMp3.cpp
View file

@ -241,7 +241,6 @@ static u32 sceMp3ReserveMp3Handle(u32 mp3Addr) {
}
Au->SumDecodedSamples = 0;
Au->MaxOutputSample = Au->PCMBufSize / 4;
Au->LoopNum = -1;
Au->AuBufAvailable = 0;
Au->readPos = Au->startPos;
@ -345,6 +344,18 @@ static int __CalculateMp3Bitrates(int bitval, int mp3version, int mp3layer) {
}
}
static int CalculateMp3SamplesPerFrame(int versionBits, int layerBits) {
if (versionBits == 1 || layerBits == 0) {
return -1;
} else if (layerBits == 3) {
return 384;
} else if (layerBits == 2 || versionBits == 3) {
return 1152;
} else {
return 576;
}
}
static int ParseMp3Header(AuCtx *ctx, int offset, bool *isID3) {
u32 ptr = ctx->AuBuf + ctx->AuStreamWorkareaSize() + offset;
int header = bswap32(Memory::Read_U32(ptr));
@ -397,6 +408,7 @@ static int sceMp3Init(u32 mp3) {
ctx->SamplingRate = __CalculateMp3SampleRates((header >> 10) & 0x3, ctx->Version);
ctx->Channels = __CalculateMp3Channels((header >> 6) & 0x3);
ctx->BitRate = __CalculateMp3Bitrates((header >> 12) & 0xF, ctx->Version, layer);
ctx->MaxOutputSample = CalculateMp3SamplesPerFrame(ctx->Version, layer);
ctx->freq = ctx->SamplingRate;
// for mp3, if required freq is 48000, reset resampling Frequency to 48000 seems get better sound quality (e.g. Miku Custom BGM)
@ -452,14 +464,18 @@ static int sceMp3GetLoopNum(u32 mp3) {
}
static int sceMp3GetMaxOutputSample(u32 mp3) {
DEBUG_LOG(ME, "sceMp3GetMaxOutputSample(%08x)", mp3);
AuCtx *ctx = getMp3Ctx(mp3);
if (!ctx) {
ERROR_LOG(ME, "%s: bad mp3 handle %08x", __FUNCTION__, mp3);
return -1;
if (mp3 >= MP3_MAX_HANDLES)
return hleLogError(ME, ERROR_MP3_INVALID_HANDLE, "invalid handle");
return hleLogError(ME, ERROR_MP3_NOT_YET_INIT_HANDLE, "unreserved handle");
} else if (ctx->Version < 0) {
return hleLogError(ME, ERROR_MP3_NOT_YET_INIT_HANDLE, "not yet init");
} else if (ctx->AuBuf == 0) {
return hleLogWarning(ME, 0, "no channel available for low level");
}
return ctx->AuGetMaxOutputSample();
return hleLogSuccessI(ME, ctx->AuGetMaxOutputSample());
}
static int sceMp3GetSumDecodedSample(u32 mp3) {

1
Core/HW/SimpleAudioDec.cpp
View file

@ -299,7 +299,6 @@ AuCtx::AuCtx() {
PCMBufSize = 2048;
AuBufAvailable = 0;
SumDecodedSamples = 0;
MaxOutputSample = 0;
askedReadSize = 0;
audioType = 0;
FrameNum = 0;

2
Core/HW/SimpleAudioDec.h
View file

@ -138,7 +138,7 @@ public:
// State variables. These should be relatively easy to move into private.
u32 SumDecodedSamples;
int LoopNum;
u32 MaxOutputSample;
u32 MaxOutputSample = 0;
int FrameNum; // number of decoded frame
// Au decoder