/***********************************************************************
* MPEG3_StreamConvert
*
*/
static LRESULT MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
{
AcmMpeg3Data* aad = (AcmMpeg3Data*)adsi->dwDriver;
DWORD nsrc = adsh->cbSrcLength;
DWORD ndst = adsh->cbDstLength;
if (adsh->fdwConvert &
~(ACM_STREAMCONVERTF_BLOCKALIGN|
ACM_STREAMCONVERTF_END|
ACM_STREAMCONVERTF_START))
{
FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh->fdwConvert);
}
/* ACM_STREAMCONVERTF_BLOCKALIGN
* currently all conversions are block aligned, so do nothing for this flag
* ACM_STREAMCONVERTF_END
* no pending data, so do nothing for this flag
*/
if ((adsh->fdwConvert & ACM_STREAMCONVERTF_START))
{
MPEG3_Reset(adsi, aad);
}
aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
adsh->cbSrcLengthUsed = nsrc;
adsh->cbDstLengthUsed = ndst;
return MMSYSERR_NOERROR;
}
/***********************************************************************
* MPEG3_StreamOpen
*
*/
static LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
{
AcmMpeg3Data* aad;
int err;
assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
if (MPEG3_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
MPEG3_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
return ACMERR_NOTPOSSIBLE;
aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data));
if (aad == 0) return MMSYSERR_NOMEM;
adsi->dwDriver = (DWORD_PTR)aad;
if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
{
goto theEnd;
}
else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
{
/* resampling or mono <=> stereo not available
* MPEG3 algo only define 16 bit per sample output
*/
if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
adsi->pwfxDst->wBitsPerSample != 16)
goto theEnd;
aad->convert = mp3_horse;
aad->mh = mpg123_new(NULL,&err);
mpg123_open_feed(aad->mh);
}
/* no encoding yet
else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
*/
else goto theEnd;
MPEG3_Reset(adsi, aad);
return MMSYSERR_NOERROR;
theEnd:
HeapFree(GetProcessHeap(), 0, aad);
adsi->dwDriver = 0L;
return MMSYSERR_NOTSUPPORTED;
}