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winemp3: Fixed mpeg3_streamsize. 

mpeg3_streamsize must estimate the number of samples of an mp3 chunk. 
The result must be block aligned (PCM) or frame aligned (MP3).
oldstable
Stefano Guidoni 2009-03-24 20:52:54 +01:00 committed by Alexandre Julliard
parent 5396fbf97d
commit 21186d5a69
1 changed files with 20 additions and 8 deletions
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28
dlls/winemp3.acm/mpegl3.c
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@ -471,6 +471,8 @@ static LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
*/
static LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
{
DWORD nblocks;
switch (adss->fdwSize)
{
case ACM_STREAMSIZEF_DESTINATION:
@ -478,14 +480,19 @@ static LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE ad
if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
{
/* don't take block overhead into account, doesn't matter too much */
adss->cbSrcLength = adss->cbDstLength * 12;
nblocks = (adsi->pwfxDst->nAvgBytesPerSec * 8 * 144 / adsi->pwfxDst->nSamplesPerSec);
nblocks = (adss->cbDstLength - 3002 - nblocks) / nblocks;
if (nblocks == 0)
return ACMERR_NOTPOSSIBLE;
adss->cbSrcLength = nblocks * 1152 * adsi->pwfxSrc->nBlockAlign;
}
else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
{
FIXME("misses the block header overhead\n");
adss->cbSrcLength = 256 + adss->cbDstLength / 12;
nblocks = adss->cbDstLength / (adsi->pwfxDst->nBlockAlign * 1152);
if (nblocks == 0)
return ACMERR_NOTPOSSIBLE;
adss->cbSrcLength = nblocks * (DWORD)(adsi->pwfxSrc->nAvgBytesPerSec * 8 * 144 / adsi->pwfxSrc->nSamplesPerSec);
}
else
{
@ -497,14 +504,19 @@ static LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE ad
if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
{
FIXME("misses the block header overhead\n");
adss->cbDstLength = 256 + adss->cbSrcLength / 12;
nblocks = adss->cbSrcLength / (adsi->pwfxSrc->nBlockAlign * 1152);
if (nblocks == 0)
return ACMERR_NOTPOSSIBLE;
adss->cbDstLength = nblocks * (DWORD)(adsi->pwfxDst->nAvgBytesPerSec * 8 * 144 / adsi->pwfxDst->nSamplesPerSec);
}
else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
{
/* don't take block overhead into account, doesn't matter too much */
adss->cbDstLength = adss->cbSrcLength * 12;
nblocks = (adsi->pwfxSrc->nAvgBytesPerSec * 8 * 144 / adsi->pwfxSrc->nSamplesPerSec);
nblocks = (adss->cbSrcLength - 3002 - nblocks) / nblocks;
if (nblocks == 0)
return ACMERR_NOTPOSSIBLE;
adss->cbDstLength = nblocks * 1152 * adsi->pwfxDst->nBlockAlign;
}
else
{