2 * MPEG Layer 3 handling
4 * Copyright (C) 2002 Eric Pouech
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
37 #include "wine/debug.h"
39 WINE_DEFAULT_DEBUG_CHANNEL(mpeg3
);
41 /***********************************************************************
44 static LRESULT
MPEG3_drvOpen(LPCSTR str
)
49 /***********************************************************************
52 static LRESULT
MPEG3_drvClose(DWORD_PTR dwDevID
)
57 typedef struct tagAcmMpeg3Data
59 void (*convert
)(PACMDRVSTREAMINSTANCE adsi
,
60 const unsigned char*, LPDWORD
, unsigned char*, LPDWORD
);
64 /* table to list all supported formats... those are the basic ones. this
65 * also helps given a unique index to each of the supported formats
74 static const Format PCM_Formats
[] =
76 {1, 8, 8000}, {2, 8, 8000}, {1, 16, 8000}, {2, 16, 8000},
77 {1, 8, 11025}, {2, 8, 11025}, {1, 16, 11025}, {2, 16, 11025},
78 {1, 8, 22050}, {2, 8, 22050}, {1, 16, 22050}, {2, 16, 22050},
79 {1, 8, 44100}, {2, 8, 44100}, {1, 16, 44100}, {2, 16, 44100},
80 {1, 8, 48000}, {2, 8, 48000}, {1, 16, 48000}, {2, 16, 48000},
83 static const Format MPEG3_Formats
[] =
85 {1, 0, 8000}, {2, 0, 8000}, {1, 0, 11025}, {2, 0, 11025},
86 {1, 0, 22050}, {2, 0, 22050}, {1, 0, 44100}, {2, 0, 44100},
87 {1, 0, 48000}, {2, 0, 48000},
90 #define NUM_PCM_FORMATS (sizeof(PCM_Formats) / sizeof(PCM_Formats[0]))
91 #define NUM_MPEG3_FORMATS (sizeof(MPEG3_Formats) / sizeof(MPEG3_Formats[0]))
93 /***********************************************************************
94 * MPEG3_GetFormatIndex
96 static DWORD
MPEG3_GetFormatIndex(LPWAVEFORMATEX wfx
)
101 switch (wfx
->wFormatTag
)
103 case WAVE_FORMAT_PCM
:
104 hi
= NUM_PCM_FORMATS
;
107 case WAVE_FORMAT_MPEGLAYER3
:
108 hi
= NUM_MPEG3_FORMATS
;
109 fmts
= MPEG3_Formats
;
115 for (i
= 0; i
< hi
; i
++)
117 if (wfx
->nChannels
== fmts
[i
].nChannels
&&
118 wfx
->nSamplesPerSec
== fmts
[i
].rate
&&
119 (wfx
->wBitsPerSample
== fmts
[i
].nBits
|| !fmts
[i
].nBits
))
126 static DWORD
get_num_buffered_bytes(struct mpstr
*mp
)
129 struct buf
* p
= mp
->tail
;
131 numBuff
+= p
->size
- p
->pos
;
137 static void mp3_horse(PACMDRVSTREAMINSTANCE adsi
,
138 const unsigned char* src
, LPDWORD nsrc
,
139 unsigned char* dst
, LPDWORD ndst
)
141 AcmMpeg3Data
* amd
= (AcmMpeg3Data
*)adsi
->dwDriver
;
144 DWORD buffered_before
;
145 DWORD buffered_during
;
146 DWORD buffered_after
;
148 /* Skip leading ID v3 header */
149 if (amd
->mp
.fsizeold
== -1 && !strncmp("ID3", (char*)src
, 3))
152 const char *header
= (char *)src
;
154 TRACE("Found ID3 v2.%d.%d\n", header
[3], header
[4]);
155 length
+= (header
[6] & 0x7F) << 21;
156 length
+= (header
[7] & 0x7F) << 14;
157 length
+= (header
[8] & 0x7F) << 7;
158 length
+= (header
[9] & 0x7F);
159 TRACE("Length: %u\n", length
);
165 buffered_before
= get_num_buffered_bytes(&amd
->mp
);
166 ret
= decodeMP3(&amd
->mp
, src
, *nsrc
, dst
, *ndst
, &size
);
167 buffered_during
= get_num_buffered_bytes(&amd
->mp
);
171 FIXME("Error occurred during decoding!\n");
177 if (*ndst
- dpos
< 4608) break;
178 ret
= decodeMP3(&amd
->mp
, NULL
, 0,
179 dst
+ dpos
, *ndst
- dpos
, &size
);
180 } while (ret
== MP3_OK
);
183 buffered_after
= get_num_buffered_bytes(&amd
->mp
);
184 TRACE("before %d put %d during %d after %d\n", buffered_before
, *nsrc
, buffered_during
, buffered_after
);
186 *nsrc
-= buffered_after
;
187 ClearMP3Buffer(&amd
->mp
);
190 /***********************************************************************
191 * MPEG3_DriverDetails
194 static LRESULT
MPEG3_DriverDetails(PACMDRIVERDETAILSW add
)
196 add
->fccType
= ACMDRIVERDETAILS_FCCTYPE_AUDIOCODEC
;
197 add
->fccComp
= ACMDRIVERDETAILS_FCCCOMP_UNDEFINED
;
200 add
->vdwACM
= 0x01000000;
201 add
->vdwDriver
= 0x01000000;
202 add
->fdwSupport
= ACMDRIVERDETAILS_SUPPORTF_CODEC
;
203 add
->cFormatTags
= 2; /* PCM, MPEG3 */
204 add
->cFilterTags
= 0;
206 MultiByteToWideChar( CP_ACP
, 0, "WINE-MPEG3", -1,
207 add
->szShortName
, sizeof(add
->szShortName
)/sizeof(WCHAR
) );
208 MultiByteToWideChar( CP_ACP
, 0, "Wine MPEG3 decoder", -1,
209 add
->szLongName
, sizeof(add
->szLongName
)/sizeof(WCHAR
) );
210 MultiByteToWideChar( CP_ACP
, 0, "Brought to you by the Wine team (based on mpglib by Michael Hipp)...", -1,
211 add
->szCopyright
, sizeof(add
->szCopyright
)/sizeof(WCHAR
) );
212 MultiByteToWideChar( CP_ACP
, 0, "Refer to LICENSE file", -1,
213 add
->szLicensing
, sizeof(add
->szLicensing
)/sizeof(WCHAR
) );
214 add
->szFeatures
[0] = 0;
216 return MMSYSERR_NOERROR
;
219 /***********************************************************************
220 * MPEG3_FormatTagDetails
223 static LRESULT
MPEG3_FormatTagDetails(PACMFORMATTAGDETAILSW aftd
, DWORD dwQuery
)
225 static const WCHAR szPcm
[]={'P','C','M',0};
226 static const WCHAR szMpeg3
[]={'M','P','e','g','3',0};
230 case ACM_FORMATTAGDETAILSF_INDEX
:
231 if (aftd
->dwFormatTagIndex
>= 2) return ACMERR_NOTPOSSIBLE
;
233 case ACM_FORMATTAGDETAILSF_LARGESTSIZE
:
234 if (aftd
->dwFormatTag
== WAVE_FORMAT_UNKNOWN
)
236 aftd
->dwFormatTagIndex
= 1; /* WAVE_FORMAT_MPEGLAYER3 is bigger than PCM */
240 case ACM_FORMATTAGDETAILSF_FORMATTAG
:
241 switch (aftd
->dwFormatTag
)
243 case WAVE_FORMAT_PCM
: aftd
->dwFormatTagIndex
= 0; break;
244 case WAVE_FORMAT_MPEGLAYER3
: aftd
->dwFormatTagIndex
= 1; break;
245 default: return ACMERR_NOTPOSSIBLE
;
249 WARN("Unsupported query %08x\n", dwQuery
);
250 return MMSYSERR_NOTSUPPORTED
;
253 aftd
->fdwSupport
= ACMDRIVERDETAILS_SUPPORTF_CODEC
;
254 switch (aftd
->dwFormatTagIndex
)
257 aftd
->dwFormatTag
= WAVE_FORMAT_PCM
;
258 aftd
->cbFormatSize
= sizeof(PCMWAVEFORMAT
);
259 aftd
->cStandardFormats
= NUM_PCM_FORMATS
;
260 lstrcpyW(aftd
->szFormatTag
, szPcm
);
263 aftd
->dwFormatTag
= WAVE_FORMAT_MPEGLAYER3
;
264 aftd
->cbFormatSize
= sizeof(MPEGLAYER3WAVEFORMAT
);
265 aftd
->cStandardFormats
= NUM_MPEG3_FORMATS
;
266 lstrcpyW(aftd
->szFormatTag
, szMpeg3
);
269 return MMSYSERR_NOERROR
;
272 static void fill_in_wfx(unsigned cbwfx
, WAVEFORMATEX
* wfx
, unsigned bit_rate
)
274 MPEGLAYER3WAVEFORMAT
* mp3wfx
= (MPEGLAYER3WAVEFORMAT
*)wfx
;
276 wfx
->nAvgBytesPerSec
= bit_rate
/ 8;
277 if (cbwfx
>= sizeof(WAVEFORMATEX
))
278 wfx
->cbSize
= sizeof(MPEGLAYER3WAVEFORMAT
) - sizeof(WAVEFORMATEX
);
279 if (cbwfx
>= sizeof(MPEGLAYER3WAVEFORMAT
))
281 mp3wfx
->wID
= MPEGLAYER3_ID_MPEG
;
282 mp3wfx
->fdwFlags
= MPEGLAYER3_FLAG_PADDING_OFF
;
283 mp3wfx
->nBlockSize
= (bit_rate
* 144) / wfx
->nSamplesPerSec
;
284 mp3wfx
->nFramesPerBlock
= 1;
285 mp3wfx
->nCodecDelay
= 0x0571;
289 /***********************************************************************
290 * MPEG3_FormatDetails
293 static LRESULT
MPEG3_FormatDetails(PACMFORMATDETAILSW afd
, DWORD dwQuery
)
297 case ACM_FORMATDETAILSF_FORMAT
:
298 if (MPEG3_GetFormatIndex(afd
->pwfx
) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE
;
300 case ACM_FORMATDETAILSF_INDEX
:
301 afd
->pwfx
->wFormatTag
= afd
->dwFormatTag
;
302 switch (afd
->dwFormatTag
)
304 case WAVE_FORMAT_PCM
:
305 if (afd
->dwFormatIndex
>= NUM_PCM_FORMATS
) return ACMERR_NOTPOSSIBLE
;
306 afd
->pwfx
->nChannels
= PCM_Formats
[afd
->dwFormatIndex
].nChannels
;
307 afd
->pwfx
->nSamplesPerSec
= PCM_Formats
[afd
->dwFormatIndex
].rate
;
308 afd
->pwfx
->wBitsPerSample
= PCM_Formats
[afd
->dwFormatIndex
].nBits
;
309 /* native MSACM uses a PCMWAVEFORMAT structure, so cbSize is not accessible
310 * afd->pwfx->cbSize = 0;
312 afd
->pwfx
->nBlockAlign
=
313 (afd
->pwfx
->nChannels
* afd
->pwfx
->wBitsPerSample
) / 8;
314 afd
->pwfx
->nAvgBytesPerSec
=
315 afd
->pwfx
->nSamplesPerSec
* afd
->pwfx
->nBlockAlign
;
317 case WAVE_FORMAT_MPEGLAYER3
:
318 if (afd
->dwFormatIndex
>= NUM_MPEG3_FORMATS
) return ACMERR_NOTPOSSIBLE
;
319 afd
->pwfx
->nChannels
= MPEG3_Formats
[afd
->dwFormatIndex
].nChannels
;
320 afd
->pwfx
->nSamplesPerSec
= MPEG3_Formats
[afd
->dwFormatIndex
].rate
;
321 afd
->pwfx
->wBitsPerSample
= MPEG3_Formats
[afd
->dwFormatIndex
].nBits
;
322 afd
->pwfx
->nBlockAlign
= 1;
323 fill_in_wfx(afd
->cbwfx
, afd
->pwfx
, 192000);
326 WARN("Unsupported tag %08x\n", afd
->dwFormatTag
);
327 return MMSYSERR_INVALPARAM
;
331 WARN("Unsupported query %08x\n", dwQuery
);
332 return MMSYSERR_NOTSUPPORTED
;
334 afd
->fdwSupport
= ACMDRIVERDETAILS_SUPPORTF_CODEC
;
335 afd
->szFormat
[0] = 0; /* let MSACM format this for us... */
337 return MMSYSERR_NOERROR
;
340 /***********************************************************************
341 * MPEG3_FormatSuggest
344 static LRESULT
MPEG3_FormatSuggest(PACMDRVFORMATSUGGEST adfs
)
347 if (adfs
->cbwfxSrc
< sizeof(PCMWAVEFORMAT
) ||
348 adfs
->cbwfxDst
< sizeof(PCMWAVEFORMAT
) ||
349 MPEG3_GetFormatIndex(adfs
->pwfxSrc
) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE
;
350 /* FIXME: should do those tests against the real size (according to format tag */
352 /* If no suggestion for destination, then copy source value */
353 if (!(adfs
->fdwSuggest
& ACM_FORMATSUGGESTF_NCHANNELS
))
354 adfs
->pwfxDst
->nChannels
= adfs
->pwfxSrc
->nChannels
;
355 if (!(adfs
->fdwSuggest
& ACM_FORMATSUGGESTF_NSAMPLESPERSEC
))
356 adfs
->pwfxDst
->nSamplesPerSec
= adfs
->pwfxSrc
->nSamplesPerSec
;
358 if (!(adfs
->fdwSuggest
& ACM_FORMATSUGGESTF_WBITSPERSAMPLE
))
360 if (adfs
->pwfxSrc
->wFormatTag
== WAVE_FORMAT_PCM
)
361 adfs
->pwfxDst
->wBitsPerSample
= 4;
363 adfs
->pwfxDst
->wBitsPerSample
= 16;
365 if (!(adfs
->fdwSuggest
& ACM_FORMATSUGGESTF_WFORMATTAG
))
367 if (adfs
->pwfxSrc
->wFormatTag
== WAVE_FORMAT_PCM
)
368 adfs
->pwfxDst
->wFormatTag
= WAVE_FORMAT_MPEGLAYER3
;
370 adfs
->pwfxDst
->wFormatTag
= WAVE_FORMAT_PCM
;
373 /* check if result is ok */
374 if (MPEG3_GetFormatIndex(adfs
->pwfxDst
) == 0xFFFFFFFF) return ACMERR_NOTPOSSIBLE
;
376 /* recompute other values */
377 switch (adfs
->pwfxDst
->wFormatTag
)
379 case WAVE_FORMAT_PCM
:
380 adfs
->pwfxDst
->nBlockAlign
= (adfs
->pwfxDst
->nChannels
* adfs
->pwfxDst
->wBitsPerSample
) / 8;
381 adfs
->pwfxDst
->nAvgBytesPerSec
= adfs
->pwfxDst
->nSamplesPerSec
* adfs
->pwfxDst
->nBlockAlign
;
383 case WAVE_FORMAT_MPEGLAYER3
:
384 adfs
->pwfxDst
->nBlockAlign
= 1;
385 fill_in_wfx(adfs
->cbwfxDst
, adfs
->pwfxDst
, 192000);
392 return MMSYSERR_NOERROR
;
395 /***********************************************************************
399 static void MPEG3_Reset(PACMDRVSTREAMINSTANCE adsi
, AcmMpeg3Data
* aad
)
401 ClearMP3Buffer(&aad
->mp
);
405 /***********************************************************************
409 static LRESULT
MPEG3_StreamOpen(PACMDRVSTREAMINSTANCE adsi
)
413 assert(!(adsi
->fdwOpen
& ACM_STREAMOPENF_ASYNC
));
415 if (MPEG3_GetFormatIndex(adsi
->pwfxSrc
) == 0xFFFFFFFF ||
416 MPEG3_GetFormatIndex(adsi
->pwfxDst
) == 0xFFFFFFFF)
417 return ACMERR_NOTPOSSIBLE
;
419 aad
= HeapAlloc(GetProcessHeap(), 0, sizeof(AcmMpeg3Data
));
420 if (aad
== 0) return MMSYSERR_NOMEM
;
422 adsi
->dwDriver
= (DWORD
)aad
;
424 if (adsi
->pwfxSrc
->wFormatTag
== WAVE_FORMAT_PCM
&&
425 adsi
->pwfxDst
->wFormatTag
== WAVE_FORMAT_PCM
)
429 else if (adsi
->pwfxSrc
->wFormatTag
== WAVE_FORMAT_MPEGLAYER3
&&
430 adsi
->pwfxDst
->wFormatTag
== WAVE_FORMAT_PCM
)
432 /* resampling or mono <=> stereo not available
433 * MPEG3 algo only define 16 bit per sample output
435 if (adsi
->pwfxSrc
->nSamplesPerSec
!= adsi
->pwfxDst
->nSamplesPerSec
||
436 adsi
->pwfxSrc
->nChannels
!= adsi
->pwfxDst
->nChannels
||
437 adsi
->pwfxDst
->wBitsPerSample
!= 16)
439 aad
->convert
= mp3_horse
;
443 else if (adsi->pwfxSrc->wFormatTag == WAVE_FORMAT_PCM &&
444 adsi->pwfxDst->wFormatTag == WAVE_FORMAT_MPEGLAYER3)
447 MPEG3_Reset(adsi
, aad
);
449 return MMSYSERR_NOERROR
;
452 HeapFree(GetProcessHeap(), 0, aad
);
454 return MMSYSERR_NOTSUPPORTED
;
457 /***********************************************************************
461 static LRESULT
MPEG3_StreamClose(PACMDRVSTREAMINSTANCE adsi
)
463 ClearMP3Buffer(&((AcmMpeg3Data
*)adsi
->dwDriver
)->mp
);
464 HeapFree(GetProcessHeap(), 0, (void*)adsi
->dwDriver
);
465 return MMSYSERR_NOERROR
;
468 /***********************************************************************
472 static LRESULT
MPEG3_StreamSize(PACMDRVSTREAMINSTANCE adsi
, PACMDRVSTREAMSIZE adss
)
474 switch (adss
->fdwSize
)
476 case ACM_STREAMSIZEF_DESTINATION
:
477 /* cbDstLength => cbSrcLength */
478 if (adsi
->pwfxSrc
->wFormatTag
== WAVE_FORMAT_PCM
&&
479 adsi
->pwfxDst
->wFormatTag
== WAVE_FORMAT_MPEGLAYER3
)
481 /* don't take block overhead into account, doesn't matter too much */
482 adss
->cbSrcLength
= adss
->cbDstLength
* 12;
484 else if (adsi
->pwfxSrc
->wFormatTag
== WAVE_FORMAT_MPEGLAYER3
&&
485 adsi
->pwfxDst
->wFormatTag
== WAVE_FORMAT_PCM
)
487 FIXME("misses the block header overhead\n");
488 adss
->cbSrcLength
= 256 + adss
->cbDstLength
/ 12;
492 return MMSYSERR_NOTSUPPORTED
;
495 case ACM_STREAMSIZEF_SOURCE
:
496 /* cbSrcLength => cbDstLength */
497 if (adsi
->pwfxSrc
->wFormatTag
== WAVE_FORMAT_PCM
&&
498 adsi
->pwfxDst
->wFormatTag
== WAVE_FORMAT_MPEGLAYER3
)
500 FIXME("misses the block header overhead\n");
501 adss
->cbDstLength
= 256 + adss
->cbSrcLength
/ 12;
503 else if (adsi
->pwfxSrc
->wFormatTag
== WAVE_FORMAT_MPEGLAYER3
&&
504 adsi
->pwfxDst
->wFormatTag
== WAVE_FORMAT_PCM
)
506 /* don't take block overhead into account, doesn't matter too much */
507 adss
->cbDstLength
= adss
->cbSrcLength
* 12;
511 return MMSYSERR_NOTSUPPORTED
;
515 WARN("Unsupported query %08x\n", adss
->fdwSize
);
516 return MMSYSERR_NOTSUPPORTED
;
518 return MMSYSERR_NOERROR
;
521 /***********************************************************************
522 * MPEG3_StreamConvert
525 static LRESULT
MPEG3_StreamConvert(PACMDRVSTREAMINSTANCE adsi
, PACMDRVSTREAMHEADER adsh
)
527 AcmMpeg3Data
* aad
= (AcmMpeg3Data
*)adsi
->dwDriver
;
528 DWORD nsrc
= adsh
->cbSrcLength
;
529 DWORD ndst
= adsh
->cbDstLength
;
531 if (adsh
->fdwConvert
&
532 ~(ACM_STREAMCONVERTF_BLOCKALIGN
|
533 ACM_STREAMCONVERTF_END
|
534 ACM_STREAMCONVERTF_START
))
536 FIXME("Unsupported fdwConvert (%08x), ignoring it\n", adsh
->fdwConvert
);
538 /* ACM_STREAMCONVERTF_BLOCKALIGN
539 * currently all conversions are block aligned, so do nothing for this flag
540 * ACM_STREAMCONVERTF_END
541 * no pending data, so do nothing for this flag
543 if ((adsh
->fdwConvert
& ACM_STREAMCONVERTF_START
))
545 MPEG3_Reset(adsi
, aad
);
548 aad
->convert(adsi
, adsh
->pbSrc
, &nsrc
, adsh
->pbDst
, &ndst
);
549 adsh
->cbSrcLengthUsed
= nsrc
;
550 adsh
->cbDstLengthUsed
= ndst
;
552 return MMSYSERR_NOERROR
;
555 /**************************************************************************
556 * MPEG3_DriverProc [exported]
558 LRESULT CALLBACK
MPEG3_DriverProc(DWORD_PTR dwDevID
, HDRVR hDriv
, UINT wMsg
,
559 LPARAM dwParam1
, LPARAM dwParam2
)
561 TRACE("(%08lx %p %04x %08lx %08lx);\n",
562 dwDevID
, hDriv
, wMsg
, dwParam1
, dwParam2
);
566 case DRV_LOAD
: return 1;
567 case DRV_FREE
: return 1;
568 case DRV_OPEN
: return MPEG3_drvOpen((LPSTR
)dwParam1
);
569 case DRV_CLOSE
: return MPEG3_drvClose(dwDevID
);
570 case DRV_ENABLE
: return 1;
571 case DRV_DISABLE
: return 1;
572 case DRV_QUERYCONFIGURE
: return 1;
573 case DRV_CONFIGURE
: MessageBoxA(0, "MPEG3 filter !", "Wine Driver", MB_OK
); return 1;
574 case DRV_INSTALL
: return DRVCNF_RESTART
;
575 case DRV_REMOVE
: return DRVCNF_RESTART
;
577 case ACMDM_DRIVER_NOTIFY
:
578 /* no caching from other ACM drivers is done so far */
579 return MMSYSERR_NOERROR
;
581 case ACMDM_DRIVER_DETAILS
:
582 return MPEG3_DriverDetails((PACMDRIVERDETAILSW
)dwParam1
);
584 case ACMDM_FORMATTAG_DETAILS
:
585 return MPEG3_FormatTagDetails((PACMFORMATTAGDETAILSW
)dwParam1
, dwParam2
);
587 case ACMDM_FORMAT_DETAILS
:
588 return MPEG3_FormatDetails((PACMFORMATDETAILSW
)dwParam1
, dwParam2
);
590 case ACMDM_FORMAT_SUGGEST
:
591 return MPEG3_FormatSuggest((PACMDRVFORMATSUGGEST
)dwParam1
);
593 case ACMDM_STREAM_OPEN
:
594 return MPEG3_StreamOpen((PACMDRVSTREAMINSTANCE
)dwParam1
);
596 case ACMDM_STREAM_CLOSE
:
597 return MPEG3_StreamClose((PACMDRVSTREAMINSTANCE
)dwParam1
);
599 case ACMDM_STREAM_SIZE
:
600 return MPEG3_StreamSize((PACMDRVSTREAMINSTANCE
)dwParam1
, (PACMDRVSTREAMSIZE
)dwParam2
);
602 case ACMDM_STREAM_CONVERT
:
603 return MPEG3_StreamConvert((PACMDRVSTREAMINSTANCE
)dwParam1
, (PACMDRVSTREAMHEADER
)dwParam2
);
605 case ACMDM_HARDWARE_WAVE_CAPS_INPUT
:
606 case ACMDM_HARDWARE_WAVE_CAPS_OUTPUT
:
607 /* this converter is not a hardware driver */
608 case ACMDM_FILTERTAG_DETAILS
:
609 case ACMDM_FILTER_DETAILS
:
610 /* this converter is not a filter */
611 case ACMDM_STREAM_RESET
:
612 /* only needed for asynchronous driver... we aren't, so just say it */
613 return MMSYSERR_NOTSUPPORTED
;
614 case ACMDM_STREAM_PREPARE
:
615 case ACMDM_STREAM_UNPREPARE
:
616 /* nothing special to do here... so don't do anything */
617 return MMSYSERR_NOERROR
;
620 return DefDriverProc(dwDevID
, hDriv
, wMsg
, dwParam1
, dwParam2
);