608 lines
18 KiB
C
608 lines
18 KiB
C
/*
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* MPEG Layer 3 handling
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*
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* Copyright (C) 2002 Eric Pouech
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*
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <assert.h>
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#include <string.h>
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#include "winbase.h"
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#include "wingdi.h"
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#include "winuser.h"
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#include "winnls.h"
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#include "msacm.h"
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#include "mmreg.h"
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#include "../msacmdrv.h"
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#include "mpg123.h"
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#include "mpglib.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(mpeg3);
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/***********************************************************************
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* MPEG3_drvOpen
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*/
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static DWORD MPEG3_drvOpen(LPCSTR str)
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{
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return 1;
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}
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/***********************************************************************
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* MPEG3_drvClose
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*/
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static DWORD MPEG3_drvClose(DWORD dwDevID)
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{
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return 1;
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}
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typedef struct tagAcmMpeg3Data
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{
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void (*convert)(PACMDRVSTREAMINSTANCE adsi,
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const unsigned char*, LPDWORD, unsigned char*, LPDWORD);
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struct mpstr mp;
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} AcmMpeg3Data;
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/* table to list all supported formats... those are the basic ones. this
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* also helps given a unique index to each of the supported formats
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*/
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typedef struct
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{
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int nChannels;
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int nBits;
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int rate;
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} Format;
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static Format PCM_Formats[] =
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{
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{1, 8, 8000}, {2, 8, 8000}, {1, 16, 8000}, {2, 16, 8000},
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{1, 8, 11025}, {2, 8, 11025}, {1, 16, 11025}, {2, 16, 11025},
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{1, 8, 22050}, {2, 8, 22050}, {1, 16, 22050}, {2, 16, 22050},
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{1, 8, 44100}, {2, 8, 44100}, {1, 16, 44100}, {2, 16, 44100},
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};
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static Format MPEG3_Formats[] =
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{
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{1, 0, 8000}, {2, 0, 8000}, {1, 0, 11025}, {2, 0, 11025},
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{1, 0, 22050}, {2, 0, 22050}, {1, 0, 44100}, {2, 0, 44100},
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};
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#define NUM_PCM_FORMATS (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
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#define NUM_MPEG3_FORMATS (sizeof(MPEG3_Formats) / sizeof(MPEG3_Formats[0]))
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/***********************************************************************
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* MPEG3_GetFormatIndex
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*/
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static DWORD MPEG3_GetFormatIndex(LPWAVEFORMATEX wfx)
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{
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int i, hi;
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Format* fmts;
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switch (wfx->wFormatTag)
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{
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case WAVE_FORMAT_PCM:
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hi = NUM_PCM_FORMATS;
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fmts = PCM_Formats;
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break;
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case WAVE_FORMAT_MPEGLAYER3:
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hi = NUM_MPEG3_FORMATS;
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fmts = MPEG3_Formats;
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break;
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default:
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return 0xFFFFFFFF;
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}
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for (i = 0; i < hi; i++)
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{
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if (wfx->nChannels == fmts[i].nChannels &&
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wfx->nSamplesPerSec == fmts[i].rate &&
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wfx->wBitsPerSample == fmts[i].nBits)
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return i;
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}
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return 0xFFFFFFFF;
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}
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/***********************************************************************
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* R16
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*
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* Read a 16 bit sample (correctly handles endianess)
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*/
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static inline short R16(const unsigned char* src)
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{
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return (short)((unsigned short)src[0] | ((unsigned short)src[1] << 8));
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}
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/***********************************************************************
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* W16
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*
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* Write a 16 bit sample (correctly handles endianess)
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*/
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static inline void W16(unsigned char* dst, short s)
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{
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dst[0] = LOBYTE(s);
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dst[1] = HIBYTE(s);
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}
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static void mp3_horse(PACMDRVSTREAMINSTANCE adsi,
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const unsigned char* src, LPDWORD nsrc,
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unsigned char* dst, LPDWORD ndst)
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{
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AcmMpeg3Data* amd = (AcmMpeg3Data*)adsi->dwDriver;
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int size, ret;
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DWORD dpos = 0;
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ret = decodeMP3(&amd->mp, (unsigned char*)src, *nsrc, dst, *ndst, &size);
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if (ret != MP3_OK)
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{
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*ndst = *nsrc = 0;
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return;
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}
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do {
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dpos += size;
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if (*ndst - dpos < 4608) break;
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ret = decodeMP3(&amd->mp, NULL, 0,
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dst + dpos, *ndst - dpos, &size);
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} while (ret == MP3_OK);
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*ndst = dpos;
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}
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/***********************************************************************
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* MPEG3_DriverDetails
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*
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*/
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static LRESULT MPEG3_DriverDetails(PACMDRIVERDETAILSW add)
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{
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add->fccType = ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC;
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add->fccComp = ACMDRIVERDETAILS_FCCCOMP_UNDEFINED;
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add->wMid = 0xFF;
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add->wPid = 0x00;
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add->vdwACM = 0x01000000;
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add->vdwDriver = 0x01000000;
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add->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
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add->cFormatTags = 2; /* PCM, MPEG3 */
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add->cFilterTags = 0;
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add->hicon = NULL;
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MultiByteToWideChar( CP_ACP, 0, "WINE-MPEG3", -1,
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add->szShortName, sizeof(add->szShortName)/sizeof(WCHAR) );
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MultiByteToWideChar( CP_ACP, 0, "Wine MPEG3 decoder", -1,
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add->szLongName, sizeof(add->szLongName)/sizeof(WCHAR) );
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MultiByteToWideChar( CP_ACP, 0, "Brought to you by the Wine team (based on mpglib by Michael Hipp)...", -1,
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add->szCopyright, sizeof(add->szCopyright)/sizeof(WCHAR) );
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MultiByteToWideChar( CP_ACP, 0, "Refer to LICENSE file", -1,
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add->szLicensing, sizeof(add->szLicensing)/sizeof(WCHAR) );
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add->szFeatures[0] = 0;
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return MMSYSERR_NOERROR;
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}
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/***********************************************************************
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* MPEG3_FormatTagDetails
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*
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*/
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static LRESULT MPEG3_FormatTagDetails(PACMFORMATTAGDETAILSW aftd, DWORD dwQuery)
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{
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static WCHAR szPcm[]={'P','C','M',0};
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static WCHAR szMpeg3[]={'M','P','e','g','3',0};
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switch (dwQuery)
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{
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case ACM_FORMATTAGDETAILSF_INDEX:
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if (aftd->dwFormatTagIndex >= 2) return ACMERR_NOTPOSSIBLE;
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break;
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case ACM_FORMATTAGDETAILSF_LARGESTSIZE:
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if (aftd->dwFormatTag == WAVE_FORMAT_UNKNOWN)
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{
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aftd->dwFormatTagIndex = 1; /* WAVE_FORMAT_MPEGLAYER3 is bigger than PCM */
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break;
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}
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/* fall thru */
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case ACM_FORMATTAGDETAILSF_FORMATTAG:
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switch (aftd->dwFormatTag)
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{
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case WAVE_FORMAT_PCM: aftd->dwFormatTagIndex = 0; break;
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case WAVE_FORMAT_MPEGLAYER3: aftd->dwFormatTagIndex = 1; break;
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default: return ACMERR_NOTPOSSIBLE;
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}
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break;
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default:
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WARN("Unsupported query %08lx\n", dwQuery);
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return MMSYSERR_NOTSUPPORTED;
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}
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aftd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
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switch (aftd->dwFormatTagIndex)
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{
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case 0:
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aftd->dwFormatTag = WAVE_FORMAT_PCM;
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aftd->cbFormatSize = sizeof(PCMWAVEFORMAT);
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aftd->cStandardFormats = NUM_PCM_FORMATS;
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lstrcpyW(aftd->szFormatTag, szPcm);
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break;
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case 1:
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aftd->dwFormatTag = WAVE_FORMAT_MPEGLAYER3;
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aftd->cbFormatSize = sizeof(MPEGLAYER3WAVEFORMAT);
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aftd->cStandardFormats = NUM_MPEG3_FORMATS;
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lstrcpyW(aftd->szFormatTag, szMpeg3);
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break;
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}
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return MMSYSERR_NOERROR;
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}
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static void fill_in_wfx(unsigned cbwfx, WAVEFORMATEX* wfx, unsigned bit_rate)
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{
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MPEGLAYER3WAVEFORMAT* mp3wfx = (MPEGLAYER3WAVEFORMAT*)wfx;
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wfx->nAvgBytesPerSec = bit_rate / 8;
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if (cbwfx >= sizeof(WAVEFORMATEX))
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wfx->cbSize = sizeof(MPEGLAYER3WAVEFORMAT) - sizeof(WAVEFORMATEX);
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if (cbwfx >= sizeof(MPEGLAYER3WAVEFORMAT))
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{
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mp3wfx->wID = MPEGLAYER3_ID_MPEG;
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mp3wfx->fdwFlags = MPEGLAYER3_FLAG_PADDING_OFF;
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mp3wfx->nBlockSize = (bit_rate * 144) / wfx->nSamplesPerSec;
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mp3wfx->nFramesPerBlock = 1;
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mp3wfx->nCodecDelay = 0x0571;
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}
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}
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/***********************************************************************
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* MPEG3_FormatDetails
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*
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*/
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static LRESULT MPEG3_FormatDetails(PACMFORMATDETAILSW afd, DWORD dwQuery)
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{
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switch (dwQuery)
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{
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case ACM_FORMATDETAILSF_FORMAT:
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if (MPEG3_GetFormatIndex(afd->pwfx) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
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break;
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case ACM_FORMATDETAILSF_INDEX:
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afd->pwfx->wFormatTag = afd->dwFormatTag;
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switch (afd->dwFormatTag)
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{
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case WAVE_FORMAT_PCM:
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if (afd->dwFormatIndex >= NUM_PCM_FORMATS) return ACMERR_NOTPOSSIBLE;
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afd->pwfx->nChannels = PCM_Formats[afd->dwFormatIndex].nChannels;
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afd->pwfx->nSamplesPerSec = PCM_Formats[afd->dwFormatIndex].rate;
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afd->pwfx->wBitsPerSample = PCM_Formats[afd->dwFormatIndex].nBits;
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/* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
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* afd->pwfx->cbSize = 0;
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*/
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afd->pwfx->nBlockAlign =
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(afd->pwfx->nChannels * afd->pwfx->wBitsPerSample) / 8;
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afd->pwfx->nAvgBytesPerSec =
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afd->pwfx->nSamplesPerSec * afd->pwfx->nBlockAlign;
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break;
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case WAVE_FORMAT_MPEGLAYER3:
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if (afd->dwFormatIndex >= NUM_MPEG3_FORMATS) return ACMERR_NOTPOSSIBLE;
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afd->pwfx->nChannels = MPEG3_Formats[afd->dwFormatIndex].nChannels;
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afd->pwfx->nSamplesPerSec = MPEG3_Formats[afd->dwFormatIndex].rate;
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afd->pwfx->wBitsPerSample = MPEG3_Formats[afd->dwFormatIndex].nBits;
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afd->pwfx->nBlockAlign = 1;
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fill_in_wfx(afd->cbwfx, afd->pwfx, 192000);
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break;
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default:
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WARN("Unsupported tag %08lx\n", afd->dwFormatTag);
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return MMSYSERR_INVALPARAM;
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}
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break;
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default:
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WARN("Unsupported query %08lx\n", dwQuery);
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return MMSYSERR_NOTSUPPORTED;
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}
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afd->fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
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afd->szFormat[0] = 0; /* let MSACM format this for us... */
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return MMSYSERR_NOERROR;
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}
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/***********************************************************************
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* MPEG3_FormatSuggest
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*
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*/
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static LRESULT MPEG3_FormatSuggest(PACMDRVFORMATSUGGEST adfs)
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{
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/* some tests ... */
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if (adfs->cbwfxSrc < sizeof(PCMWAVEFORMAT) ||
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adfs->cbwfxDst < sizeof(PCMWAVEFORMAT) ||
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MPEG3_GetFormatIndex(adfs->pwfxSrc) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
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/* FIXME: should do those tests against the real size (according to format tag */
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/* If no suggestion for destination, then copy source value */
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if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NCHANNELS))
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adfs->pwfxDst->nChannels = adfs->pwfxSrc->nChannels;
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if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_NSAMPLESPERSEC))
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adfs->pwfxDst->nSamplesPerSec = adfs->pwfxSrc->nSamplesPerSec;
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if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WBITSPERSAMPLE))
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{
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if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
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adfs->pwfxDst->wBitsPerSample = 4;
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else
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adfs->pwfxDst->wBitsPerSample = 16;
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}
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if (!(adfs->fdwSuggest & ACM_FORMATSUGGESTF_WFORMATTAG))
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{
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if (adfs->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM)
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adfs->pwfxDst->wFormatTag = WAVE_FORMAT_MPEGLAYER3;
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else
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adfs->pwfxDst->wFormatTag = WAVE_FORMAT_PCM;
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}
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/* check if result is ok */
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if (MPEG3_GetFormatIndex(adfs->pwfxDst) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE;
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/* recompute other values */
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switch (adfs->pwfxDst->wFormatTag)
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{
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case WAVE_FORMAT_PCM:
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adfs->pwfxDst->nBlockAlign = (adfs->pwfxDst->nChannels * adfs->pwfxDst->wBitsPerSample) / 8;
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adfs->pwfxDst->nAvgBytesPerSec = adfs->pwfxDst->nSamplesPerSec * adfs->pwfxDst->nBlockAlign;
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break;
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case WAVE_FORMAT_MPEGLAYER3:
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adfs->pwfxDst->nBlockAlign = 1;
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fill_in_wfx(adfs->cbwfxDst, adfs->pwfxDst, 192000);
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break;
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default:
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FIXME("\n");
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break;
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}
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return MMSYSERR_NOERROR;
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}
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/***********************************************************************
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* MPEG3_Reset
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*
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*/
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static void MPEG3_Reset(PACMDRVSTREAMINSTANCE adsi, AcmMpeg3Data* aad)
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{
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}
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/***********************************************************************
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* MPEG3_StreamOpen
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*
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*/
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static LRESULT MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi)
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{
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AcmMpeg3Data* aad;
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assert(!(adsi->fdwOpen & ACM_STREAMOPENF_ASYNC));
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if (MPEG3_GetFormatIndex(adsi->pwfxSrc) == 0xFFFFFFFF ||
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MPEG3_GetFormatIndex(adsi->pwfxDst) == 0xFFFFFFFF)
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return ACMERR_NOTPOSSIBLE;
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aad = HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data));
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if (aad == 0) return MMSYSERR_NOMEM;
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adsi->dwDriver = (DWORD)aad;
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if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
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adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
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{
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goto theEnd;
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}
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else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
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adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
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{
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/* resampling or mono <=> stereo not available
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* MPEG3 algo only define 16 bit per sample output
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*/
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if (adsi->pwfxSrc->nSamplesPerSec != adsi->pwfxDst->nSamplesPerSec ||
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adsi->pwfxSrc->nChannels != adsi->pwfxDst->nChannels ||
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adsi->pwfxDst->wBitsPerSample != 16)
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goto theEnd;
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aad->convert = mp3_horse;
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InitMP3(&aad->mp);
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}
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/* no encoding yet
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else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
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adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
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*/
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else goto theEnd;
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MPEG3_Reset(adsi, aad);
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return MMSYSERR_NOERROR;
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theEnd:
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HeapFree(GetProcessHeap(), 0, aad);
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adsi->dwDriver = 0L;
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return MMSYSERR_NOTSUPPORTED;
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}
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/***********************************************************************
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* MPEG3_StreamClose
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*
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*/
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static LRESULT MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi)
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{
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ExitMP3(&((AcmMpeg3Data*)adsi->dwDriver)->mp);
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HeapFree(GetProcessHeap(), 0, (void*)adsi->dwDriver);
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return MMSYSERR_NOERROR;
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}
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/***********************************************************************
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* MPEG3_round
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*
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*/
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static inline DWORD MPEG3_round(DWORD a, DWORD b, DWORD c)
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{
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assert(a && b && c);
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/* to be sure, always return an entire number of c... */
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return ((double)a * (double)b + (double)c - 1) / (double)c;
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}
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/***********************************************************************
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* MPEG3_StreamSize
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*
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*/
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static LRESULT MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi, PACMDRVSTREAMSIZE adss)
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{
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switch (adss->fdwSize)
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{
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case ACM_STREAMSIZEF_DESTINATION:
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/* cbDstLength => cbSrcLength */
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if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
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adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
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{
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/* don't take block overhead into account, doesn't matter too much */
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adss->cbSrcLength = adss->cbDstLength * 4;
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}
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else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_MPEGLAYER3 &&
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adsi->pwfxDst->wFormatTag == WAVE_FORMAT_PCM)
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{
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FIXME("misses the block header overhead\n");
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adss->cbSrcLength = 256 + adss->cbDstLength / 4;
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}
|
|
else
|
|
{
|
|
return MMSYSERR_NOTSUPPORTED;
|
|
}
|
|
break;
|
|
case ACM_STREAMSIZEF_SOURCE:
|
|
/* cbSrcLength => cbDstLength */
|
|
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 / 4;
|
|
}
|
|
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 * 4;
|
|
}
|
|
else
|
|
{
|
|
return MMSYSERR_NOTSUPPORTED;
|
|
}
|
|
break;
|
|
default:
|
|
WARN("Unsupported query %08lx\n", adss->fdwSize);
|
|
return MMSYSERR_NOTSUPPORTED;
|
|
}
|
|
return MMSYSERR_NOERROR;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* 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 (%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))
|
|
{
|
|
MPEG3_Reset(adsi, aad);
|
|
}
|
|
|
|
aad->convert(adsi, adsh->pbSrc, &nsrc, adsh->pbDst, &ndst);
|
|
adsh->cbSrcLengthUsed = nsrc;
|
|
adsh->cbDstLengthUsed = ndst;
|
|
|
|
return MMSYSERR_NOERROR;
|
|
}
|
|
|
|
/**************************************************************************
|
|
* MPEG3_DriverProc [exported]
|
|
*/
|
|
LRESULT CALLBACK MPEG3_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 MPEG3_drvOpen((LPSTR)dwParam1);
|
|
case DRV_CLOSE: return MPEG3_drvClose(dwDevID);
|
|
case DRV_ENABLE: return 1;
|
|
case DRV_DISABLE: return 1;
|
|
case DRV_QUERYCONFIGURE: return 1;
|
|
case DRV_CONFIGURE: MessageBoxA(0, "MPEG3 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 MPEG3_DriverDetails((PACMDRIVERDETAILSW)dwParam1);
|
|
|
|
case ACMDM_FORMATTAG_DETAILS:
|
|
return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW)dwParam1, dwParam2);
|
|
|
|
case ACMDM_FORMAT_DETAILS:
|
|
return MPEG3_FormatDetails((PACMFORMATDETAILSW)dwParam1, dwParam2);
|
|
|
|
case ACMDM_FORMAT_SUGGEST:
|
|
return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST)dwParam1);
|
|
|
|
case ACMDM_STREAM_OPEN:
|
|
return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE)dwParam1);
|
|
|
|
case ACMDM_STREAM_CLOSE:
|
|
return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE)dwParam1);
|
|
|
|
case ACMDM_STREAM_SIZE:
|
|
return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE)dwParam1, (PACMDRVSTREAMSIZE)dwParam2);
|
|
|
|
case ACMDM_STREAM_CONVERT:
|
|
return MPEG3_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;
|
|
}
|