msadp32.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

    return MMSYSERR_NOERROR;
}

/***********************************************************************
 *           ADPCM_FormatDetails
 *
 */
static	LRESULT	ADPCM_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
{
    switch (dwQuery)
    {
    case ACM_FORMATDETAILSF_FORMAT:
	if (ADPCM_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
	break;
    case ACM_FORMATDETAILSF_INDEX:
	afd->pwfx->wFormatTag = afd->dwFormatTag;
	switch (afd->dwFormatTag)
        {
	case WAVE_FORMAT_PCM:
	    if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
	    afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
	    afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
	    afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
	    /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
	     * afd->pwfx->cbSize = 0;
	     */
	    afd->pwfx->nBlockAlign =
		(afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
	    afd->pwfx->nAvgBytesPerSec =
		afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
	    break;
	case WAVE_FORMAT_ADPCM:
	    if (afd->dwFormatIndex >= NUM_ADPCM_FORMATS) return ACMERR_NOTPOSSIBLE;
            if (afd->cbwfx < sizeof(ADPCMWAVEFORMAT) + (7 - 1) * sizeof(ADPCMCOEFSET))
                return ACMERR_NOTPOSSIBLE;
	    afd->pwfx->nChannels = ADPCM_Formats[afd->dwFormatIndex].nChannels;
	    afd->pwfx->nSamplesPerSec = ADPCM_Formats[afd->dwFormatIndex].rate;
	    afd->pwfx->wBitsPerSample = ADPCM_Formats[afd->dwFormatIndex].nBits;
            init_wfx_adpcm((ADPCMWAVEFORMAT*)afd->pwfx);
	    break;
	default:
	    WARN("Unsupported tag %08lx\n", afd->dwFormatTag);
	    return MMSYSERR_INVALPARAM;
	}
	break;
    default:
	WARN("Unsupported query %08lx\n", dwQuery);
	return MMSYSERR_NOTSUPPORTED;
    }
    afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
    afd->szFormat[0] = 0; /* let MSACM format this for us... */

    return MMSYSERR_NOERROR;
}

/***********************************************************************
 *           ADPCM_FormatSuggest
 *
 */
static	LRESULT	ADPCM_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
{
    /* some tests ... */
    if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
	adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
	ADPCM_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
    /* FIXME: should do those tests against the real size (according to format tag */

    /* If no suggestion for destination, then copy source value */
    if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
	adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
    if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
        adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;

    if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
    {
	if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
            adfs->pwfxDst->wBitsPerSample = 4;
        else
            adfs->pwfxDst->wBitsPerSample = 16;
    }
    if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
    {
	if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
            adfs->pwfxDst->wFormatTag = WAVE_FORMAT_ADPCM;
        else
            adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
    }

    /* check if result is ok */
    if (ADPCM_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;

    /* recompute other values */
    switch (adfs->pwfxDst->wFormatTag)
    {
    case WAVE_FORMAT_PCM:
        adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
        adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
        break;
    case WAVE_FORMAT_ADPCM:
        init_wfx_adpcm((ADPCMWAVEFORMAT*)adfs->pwfxDst);
        break;
    default:
        FIXME("\n");
        break;
    }

    return MMSYSERR_NOERROR;
}

/***********************************************************************
 *           ADPCM_Reset
 *
 */
static	void	ADPCM_Reset(PACMDRVSTREAMINSTANCE adsi, AcmAdpcmData* aad)
{
}

/***********************************************************************
 *           ADPCM_StreamOpen
 *
 */
static	LRESULT	ADPCM_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
{
    AcmAdpcmData*	aad;

    assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));

    if (ADPCM_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
	ADPCM_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
	return ACMERR_NOTPOSSIBLE;

    aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmAdpcmData));
    if (aad == 0) return MMSYSERR_NOMEM;

    adsi->dwDriver = (DWORD)aad;

    if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
	adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
    {
	goto theEnd;
    }
    else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ADPCM &&
             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
    {
	/* resampling or mono <=> stereo not available
         * ADPCM 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;

#if 0
        {
            unsigned int nspb = ((IMAADPCMWAVEFORMAT*)adsi->pwfxSrc)->wSamplesPerBlock;
            FIXME("spb=%u\n", nspb);

            /* we check that in a block, after the header, samples are present on
             * 4-sample packet pattern
             * we also check that the block alignement is bigger than the expected size
             */
            if (((nspb - 1) & 3) != 0) goto theEnd;
            if ((((nspb - 1) / 2) + 4) * adsi->pwfxSrc->nChannels < adsi->pwfxSrc->nBlockAlign)
                goto theEnd;
        }
#endif

	/* adpcm decoding... */
	if (adsi->pwfxDst->wBitsPerSample == 16 && adsi->pwfxDst->nChannels == 2)
	    aad->convert = cvtSSms16K;
	if (adsi->pwfxDst->wBitsPerSample == 16 && adsi->pwfxDst->nChannels == 1)
	    aad->convert = cvtMMms16K;
    }
    else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
             adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ADPCM)
    {
	if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
	    adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
            adsi->pwfxSrc->wBitsPerSample != 16)
	    goto theEnd;
#if 0
        nspb = ((IMAADPCMWAVEFORMAT*)adsi->pwfxDst)->wSamplesPerBlock;
        FIXME("spb=%u\n", nspb);

        /* we check that in a block, after the header, samples are present on
         * 4-sample packet pattern
         * we also check that the block alignement is bigger than the expected size
         */
        if (((nspb - 1) & 3) != 0) goto theEnd;
        if ((((nspb - 1) / 2) + 4) * adsi->pwfxDst->nChannels < adsi->pwfxDst->nBlockAlign)
            goto theEnd;
#endif
#if 0
	/* adpcm coding... */
	if (adsi->pwfxSrc->wBitsPerSample == 16 && adsi->pwfxSrc->nChannels == 2)
	    aad->convert = cvtSS16msK;
	if (adsi->pwfxSrc->wBitsPerSample == 16 && adsi->pwfxSrc->nChannels == 1)
	    aad->convert = cvtMM16msK;
#endif
        FIXME("We don't support encoding yet\n");
        goto theEnd;
    }
    else goto theEnd;
    ADPCM_Reset(adsi, aad);

    return MMSYSERR_NOERROR;

 theEnd:
    HeapFree(GetProcessHeap(), 0, aad);
    adsi->dwDriver = 0L;
    return MMSYSERR_NOTSUPPORTED;
}

/***********************************************************************
 *           ADPCM_StreamClose
 *
 */
static	LRESULT	ADPCM_StreamClose(PACMDRVSTREAMINSTANCE adsi)
{
    HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
    return MMSYSERR_NOERROR;
}

/***********************************************************************
 *           ADPCM_round
 *
 */
static	inline DWORD	ADPCM_round(DWORD a, DWORD b, DWORD c)
{
    assert(a && b && c);
    /* to be sure, always return an entire number of c... */
    return ((double)a * (double)b + (double)c - 1) / (double)c;
}

/***********************************************************************
 *           ADPCM_StreamSize
 *
 */
static	LRESULT ADPCM_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
{
    switch (adss->fdwSize)
    {
    case ACM_STREAMSIZEF_DESTINATION:
	/* cbDstLength => cbSrcLength */
	if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
	    adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ADPCM)
        {
	    /* don't take block overhead into account, doesn't matter too much */
	    adss->cbSrcLength = adss->cbDstLength * 4;
	}
        else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ADPCM &&
                 adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
        {
	    FIXME("misses the block header overhead\n");
	    adss->cbSrcLength = 256 + adss->cbDstLength / 4;
	}
        else
        {
	    return MMSYSERR_NOTSUPPORTED;
	}
	break;
    case ACM_STREAMSIZEF_SOURCE:
	/* cbSrcLength => cbDstLength */
	if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
	    adsi->pwfxDst->wFormatTag == WAVE_FORMAT_ADPCM)
        {
	    FIXME("misses the block header overhead\n");
	    adss->cbDstLength = 256 + adss->cbSrcLength / 4;
	}
        else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_ADPCM &&
                 adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
        {
	    /* don't take block overhead into account, doesn't matter too much */
	    adss->cbDstLength = adss->cbSrcLength * 4;
	}
        else
        {
	    return MMSYSERR_NOTSUPPORTED;
	}
	break;
    default:
	WARN("Unsupported query %08lx\n", adss->fdwSize);
	return MMSYSERR_NOTSUPPORTED;
    }
    return MMSYSERR_NOERROR;
}

/***********************************************************************
 *           ADPCM_StreamConvert
 *
 */
static LRESULT ADPCM_StreamConvert(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMHEADER adsh)
{
    AcmAdpcmData*	aad = (AcmAdpcmData*)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 (%08lx), 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))
    {
	ADPCM_Reset(adsi, aad);
    }

    aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
    adsh->cbSrcLengthUsed = nsrc;
    adsh->cbDstLengthUsed = ndst;

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 * 			ADPCM_DriverProc			[exported]
 */
LRESULT CALLBACK	ADPCM_DriverProc(DWORD dwDevID, HDRVR hDriv, UINT wMsg,
					 LPARAM dwParam1, LPARAM dwParam2)
{
    TRACE("(%08lx %08lx %04x %08lx %08lx);\n",
	  dwDevID, (DWORD)hDriv, wMsg, dwParam1, dwParam2);

    switch (wMsg)
    {
    case DRV_LOAD:		return 1;
    case DRV_FREE:		return 1;
    case DRV_OPEN:		return ADPCM_drvOpen((LPSTR)dwParam1);
    case DRV_CLOSE:		return ADPCM_drvClose(dwDevID);
    case DRV_ENABLE:		return 1;
    case DRV_DISABLE:		return 1;
    case DRV_QUERYCONFIGURE:	return 1;
    case DRV_CONFIGURE:		MessageBoxA(0, "MSACM MS ADPCM filter !", "Wine Driver", MB_OK); return 1;
    case DRV_INSTALL:		return DRVCNF_RESTART;
    case DRV_REMOVE:		return DRVCNF_RESTART;

    case ACMDM_DRIVER_NOTIFY:
	/* no caching from other ACM drivers is done so far */
	return MMSYSERR_NOERROR;

    case ACMDM_DRIVER_DETAILS:
	return ADPCM_DriverDetails((PACMDRIVERDETAILSW)dwParam1);

    case ACMDM_FORMATTAG_DETAILS:
	return ADPCM_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);

    case ACMDM_FORMAT_DETAILS:
	return ADPCM_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);

    case ACMDM_FORMAT_SUGGEST:
	return ADPCM_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);

    case ACMDM_STREAM_OPEN:
	return ADPCM_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);

    case ACMDM_STREAM_CLOSE:
	return ADPCM_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);

    case ACMDM_STREAM_SIZE:
	return ADPCM_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);

    case ACMDM_STREAM_CONVERT:
	return ADPCM_StreamConvert((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMHEADER)dwParam2);

    case ACMDM_HARDWARE_WAVE_CAPS_INPUT:
    case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT:
	/* this converter is not a hardware driver */
    case ACMDM_FILTERTAG_DETAILS:
    case ACMDM_FILTER_DETAILS:
	/* this converter is not a filter */
    case ACMDM_STREAM_RESET:
	/* only needed for asynchronous driver... we aren't, so just say it */
	return MMSYSERR_NOTSUPPORTED;
    case ACMDM_STREAM_PREPARE:
    case ACMDM_STREAM_UNPREPARE:
	/* nothing special to do here... so don't do anything */
	return MMSYSERR_NOERROR;

    default:
	return DefDriverProc(dwDevID, hDriv, wMsg, dwParam1, dwParam2);
    }
    return 0;
}