dlls/quartz/mpegsplit.c

   1 /*
   2  * MPEG Splitter Filter
   3  *
   4  * Copyright 2003 Robert Shearman
   5  * Copyright 2004-2005 Christian Costa
   6  * Copyright 2007 Chris Robinson
   7  * Copyright 2008 Maarten Lankhorst
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #include <assert.h>
  25 #include <math.h>
  26
  27 #include "quartz_private.h"
  28 #include "pin.h"
  29
  30 #include "uuids.h"
  31 #include "mmreg.h"
  32 #include "mmsystem.h"
  33
  34 #include "winternl.h"
  35
  36 #include "wine/unicode.h"
  37 #include "wine/debug.h"
  38
  39 #include "parser.h"
  40
  41 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  42
  43 #define SEQUENCE_HEADER_CODE     0xB3
  44 #define PACK_START_CODE          0xBA
  45
  46 #define SYSTEM_START_CODE        0xBB
  47 #define AUDIO_ELEMENTARY_STREAM  0xC0
  48 #define VIDEO_ELEMENTARY_STREAM  0xE0
  49
  50 #define MPEG_SYSTEM_HEADER 3
  51 #define MPEG_VIDEO_HEADER 2
  52 #define MPEG_AUDIO_HEADER 1
  53 #define MPEG_NO_HEADER 0
  54
  55 typedef struct MPEGSplitterImpl
  56 {
  57     ParserImpl Parser;
  58     IAMStreamSelect IAMStreamSelect_iface;
  59     LONGLONG EndOfFile;
  60     LONGLONG position;
  61     DWORD begin_offset;
  62     BYTE header[4];
  63
  64     /* Whether we just seeked (or started playing) */
  65     BOOL seek;
  66 } MPEGSplitterImpl;
  67
  68 static inline MPEGSplitterImpl *impl_from_IBaseFilter( IBaseFilter *iface )
  69 {
  70     return CONTAINING_RECORD(iface, MPEGSplitterImpl, Parser.filter.IBaseFilter_iface);
  71 }
  72
  73 static inline MPEGSplitterImpl *impl_from_IMediaSeeking( IMediaSeeking *iface )
  74 {
  75     return CONTAINING_RECORD(iface, MPEGSplitterImpl, Parser.sourceSeeking.IMediaSeeking_iface);
  76 }
  77
  78 static inline MPEGSplitterImpl *impl_from_IAMStreamSelect( IAMStreamSelect *iface )
  79 {
  80     return CONTAINING_RECORD(iface, MPEGSplitterImpl, IAMStreamSelect_iface);
  81 }
  82
  83 static int MPEGSplitter_head_check(const BYTE *header)
  84 {
  85     /* If this is a possible start code, check for a system or video header */
  86     if (header[0] == 0 && header[1] == 0 && header[2] == 1)
  87     {
  88         /* Check if we got a system or elementary stream start code */
  89         if (header[3] == PACK_START_CODE ||
  90             header[3] == VIDEO_ELEMENTARY_STREAM ||
  91             header[3] == AUDIO_ELEMENTARY_STREAM)
  92             return MPEG_SYSTEM_HEADER;
  93
  94         /* Check for a MPEG video sequence start code */
  95         if (header[3] == SEQUENCE_HEADER_CODE)
  96             return MPEG_VIDEO_HEADER;
  97     }
  98
  99     /* This should give a good guess if we have an MPEG audio header */
 100     if(header[0] == 0xff && ((header[1]>>5)&0x7) == 0x7 &&
 101        ((header[1]>>1)&0x3) != 0 && ((header[2]>>4)&0xf) != 0xf &&
 102        ((header[2]>>2)&0x3) != 0x3)
 103         return MPEG_AUDIO_HEADER;
 104
 105     /* Nothing yet.. */
 106     return MPEG_NO_HEADER;
 107 }
 108
 109 static const WCHAR wszAudioStream[] = {'A','u','d','i','o',0};
 110
 111 static const DWORD freqs[10] = { 44100, 48000, 32000, 22050, 24000, 16000, 11025, 12000,  8000, 0 };
 112
 113 static const DWORD tabsel_123[2][3][16] = {
 114     { {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,},
 115       {0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,},
 116       {0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,} },
 117
 118     { {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,},
 119       {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,},
 120       {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,} }
 121 };
 122
 123 static HRESULT parse_header(BYTE *header, LONGLONG *plen, LONGLONG *pduration)
 124 {
 125     int bitrate_index, freq_index, lsf = 1, mpeg1, layer, padding, bitrate, length;
 126     LONGLONG duration;
 127
 128     if (MPEGSplitter_head_check(header) != MPEG_AUDIO_HEADER)
 129     {
 130         FIXME("Not a valid header: %02x:%02x:%02x:%02x\n", header[0], header[1], header[2], header[3]);
 131         return E_INVALIDARG;
 132     }
 133
 134     mpeg1 = (header[1]>>4)&0x1;
 135     if (mpeg1)
 136         lsf = ((header[1]>>3)&0x1)^1;
 137
 138     layer = 4-((header[1]>>1)&0x3);
 139     bitrate_index = ((header[2]>>4)&0xf);
 140     freq_index = ((header[2]>>2)&0x3) + (mpeg1?(lsf*3):6);
 141     padding = ((header[2]>>1)&0x1);
 142
 143     bitrate = tabsel_123[lsf][layer-1][bitrate_index] * 1000;
 144     if (!bitrate)
 145     {
 146         FIXME("Not a valid header: %02x:%02x:%02x:%02x\n", header[0], header[1], header[2], header[3]);
 147         return E_INVALIDARG;
 148     }
 149
 150     if (layer == 1)
 151         length = 4 * (12 * bitrate / freqs[freq_index] + padding);
 152     else if (layer == 2)
 153         length = 144 * bitrate / freqs[freq_index] + padding;
 154     else if (layer == 3)
 155         length = 144 * bitrate / (freqs[freq_index]<<lsf) + padding;
 156     else
 157     {
 158         ERR("Impossible layer %d\n", layer);
 159         return E_INVALIDARG;
 160     }
 161
 162     duration = (ULONGLONG)10000000 * (ULONGLONG)(length) / (ULONGLONG)(bitrate/8);
 163     *plen = length;
 164     if (pduration)
 165         *pduration += duration;
 166     return S_OK;
 167 }
 168
 169 static HRESULT FillBuffer(MPEGSplitterImpl *This, IMediaSample *pCurrentSample)
 170 {
 171     Parser_OutputPin * pOutputPin = unsafe_impl_Parser_OutputPin_from_IPin(This->Parser.ppPins[1]);
 172     LONGLONG length = 0;
 173     LONGLONG pos = BYTES_FROM_MEDIATIME(This->Parser.pInputPin->rtNext);
 174     LONGLONG time = This->position, rtstop, rtstart;
 175     HRESULT hr;
 176     BYTE *fbuf = NULL;
 177     DWORD len = IMediaSample_GetActualDataLength(pCurrentSample);
 178
 179     TRACE("Source length: %u\n", len);
 180     IMediaSample_GetPointer(pCurrentSample, &fbuf);
 181
 182     /* Find the next valid header.. it <SHOULD> be right here */
 183     hr = parse_header(fbuf, &length, &This->position);
 184     assert(hr == S_OK);
 185     IMediaSample_SetActualDataLength(pCurrentSample, length);
 186
 187     /* Queue the next sample */
 188     if (length + 4 == len)
 189     {
 190         PullPin *pin = This->Parser.pInputPin;
 191         LONGLONG stop = BYTES_FROM_MEDIATIME(pin->rtStop);
 192
 193         hr = S_OK;
 194         memcpy(This->header, fbuf + length, 4);
 195         while (FAILED(hr = parse_header(This->header, &length, NULL)))
 196         {
 197             memmove(This->header, This->header+1, 3);
 198             if (pos + 4 >= stop)
 199                 break;
 200             IAsyncReader_SyncRead(pin->pReader, ++pos, 1, This->header + 3);
 201         }
 202         pin->rtNext = MEDIATIME_FROM_BYTES(pos);
 203
 204         if (SUCCEEDED(hr))
 205         {
 206             /* Remove 4 for the last header, which should hopefully work */
 207             IMediaSample *sample = NULL;
 208             LONGLONG rtSampleStart = pin->rtNext - MEDIATIME_FROM_BYTES(4);
 209             LONGLONG rtSampleStop = rtSampleStart + MEDIATIME_FROM_BYTES(length + 4);
 210
 211             if (rtSampleStop > pin->rtStop)
 212                 rtSampleStop = MEDIATIME_FROM_BYTES(ALIGNUP(BYTES_FROM_MEDIATIME(pin->rtStop), pin->cbAlign));
 213
 214             hr = IMemAllocator_GetBuffer(pin->pAlloc, &sample, NULL, NULL, 0);
 215             if (SUCCEEDED(hr))
 216             {
 217                 IMediaSample_SetTime(sample, &rtSampleStart, &rtSampleStop);
 218                 IMediaSample_SetPreroll(sample, FALSE);
 219                 IMediaSample_SetDiscontinuity(sample, FALSE);
 220                 IMediaSample_SetSyncPoint(sample, TRUE);
 221                 hr = IAsyncReader_Request(pin->pReader, sample, 0);
 222                 if (SUCCEEDED(hr))
 223                 {
 224                     pin->rtCurrent = rtSampleStart;
 225                     pin->rtNext = rtSampleStop;
 226                 }
 227                 else
 228                     IMediaSample_Release(sample);
 229             }
 230             if (FAILED(hr))
 231                 FIXME("o_Ox%08x\n", hr);
 232         }
 233     }
 234     /* If not, we're presumably at the end of file */
 235
 236     TRACE("Media time : %u.%03u\n", (DWORD)(This->position/10000000), (DWORD)((This->position/10000)%1000));
 237
 238     if (IMediaSample_IsDiscontinuity(pCurrentSample) == S_OK) {
 239         IPin *victim;
 240         EnterCriticalSection(&This->Parser.filter.csFilter);
 241         pOutputPin->pin.pin.tStart = time;
 242         pOutputPin->pin.pin.dRate = This->Parser.sourceSeeking.dRate;
 243         hr = IPin_ConnectedTo(&pOutputPin->pin.pin.IPin_iface, &victim);
 244         if (hr == S_OK)
 245         {
 246             hr = IPin_NewSegment(victim, time, This->Parser.sourceSeeking.llStop,
 247                                  This->Parser.sourceSeeking.dRate);
 248             if (hr != S_OK)
 249                 FIXME("NewSegment returns %08x\n", hr);
 250             IPin_Release(victim);
 251         }
 252         LeaveCriticalSection(&This->Parser.filter.csFilter);
 253         if (hr != S_OK)
 254             return hr;
 255     }
 256     rtstart = (double)(time - pOutputPin->pin.pin.tStart) / pOutputPin->pin.pin.dRate;
 257     rtstop = (double)(This->position - pOutputPin->pin.pin.tStart) / pOutputPin->pin.pin.dRate;
 258     IMediaSample_SetTime(pCurrentSample, &rtstart, &rtstop);
 259     IMediaSample_SetMediaTime(pCurrentSample, &time, &This->position);
 260
 261     hr = BaseOutputPinImpl_Deliver(&pOutputPin->pin, pCurrentSample);
 262
 263     if (hr != S_OK)
 264     {
 265         if (hr != S_FALSE)
 266             TRACE("Error sending sample (%x)\n", hr);
 267         else
 268             TRACE("S_FALSE (%d), holding\n", IMediaSample_GetActualDataLength(pCurrentSample));
 269     }
 270
 271     return hr;
 272 }
 273
 274
 275 static HRESULT MPEGSplitter_process_sample(LPVOID iface, IMediaSample * pSample, DWORD_PTR cookie)
 276 {
 277     MPEGSplitterImpl *This = iface;
 278     BYTE *pbSrcStream;
 279     DWORD cbSrcStream = 0;
 280     REFERENCE_TIME tStart, tStop, tAviStart = This->position;
 281     HRESULT hr;
 282
 283     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
 284     if (SUCCEEDED(hr))
 285     {
 286         cbSrcStream = IMediaSample_GetActualDataLength(pSample);
 287         hr = IMediaSample_GetPointer(pSample, &pbSrcStream);
 288     }
 289
 290     /* Flush occurring */
 291     if (cbSrcStream == 0)
 292     {
 293         FIXME(".. Why do I need you?\n");
 294         return S_OK;
 295     }
 296
 297     /* trace removed for performance reasons */
 298     /* TRACE("(%p), %llu -> %llu\n", pSample, tStart, tStop); */
 299
 300     /* Now, try to find a new header */
 301     hr = FillBuffer(This, pSample);
 302     if (hr != S_OK)
 303     {
 304         WARN("Failed with hres: %08x!\n", hr);
 305
 306         /* Unset progression if denied! */
 307         if (hr == VFW_E_WRONG_STATE || hr == S_FALSE)
 308         {
 309             memcpy(This->header, pbSrcStream, 4);
 310             This->Parser.pInputPin->rtCurrent = tStart;
 311             This->position = tAviStart;
 312         }
 313     }
 314
 315     if (BYTES_FROM_MEDIATIME(tStop) >= This->EndOfFile || This->position >= This->Parser.sourceSeeking.llStop)
 316     {
 317         unsigned int i;
 318
 319         TRACE("End of file reached\n");
 320
 321         for (i = 0; i < This->Parser.cStreams; i++)
 322         {
 323             IPin* ppin;
 324
 325             hr = IPin_ConnectedTo(This->Parser.ppPins[i+1], &ppin);
 326             if (SUCCEEDED(hr))
 327             {
 328                 hr = IPin_EndOfStream(ppin);
 329                 IPin_Release(ppin);
 330             }
 331             if (FAILED(hr))
 332                 WARN("Error sending EndOfStream to pin %u (%x)\n", i, hr);
 333         }
 334
 335         /* Force the pullpin thread to stop */
 336         hr = S_FALSE;
 337     }
 338
 339     return hr;
 340 }
 341
 342
 343 static HRESULT MPEGSplitter_query_accept(LPVOID iface, const AM_MEDIA_TYPE *pmt)
 344 {
 345     if (!IsEqualIID(&pmt->majortype, &MEDIATYPE_Stream))
 346         return S_FALSE;
 347
 348     if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1Audio))
 349         return S_OK;
 350
 351     if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1Video))
 352         FIXME("MPEG-1 video streams not yet supported.\n");
 353     else if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1System))
 354         FIXME("MPEG-1 system streams not yet supported.\n");
 355     else if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1VideoCD))
 356         FIXME("MPEG-1 VideoCD streams not yet supported.\n");
 357     else FIXME("%s\n", debugstr_guid(&pmt->subtype));
 358
 359     return S_FALSE;
 360 }
 361
 362
 363 static HRESULT MPEGSplitter_init_audio(MPEGSplitterImpl *This, const BYTE *header, PIN_INFO *ppiOutput, AM_MEDIA_TYPE *pamt)
 364 {
 365     WAVEFORMATEX *format;
 366     int bitrate_index;
 367     int freq_index;
 368     int mode_ext;
 369     int emphasis;
 370     int lsf = 1;
 371     int mpeg1;
 372     int layer;
 373     int mode;
 374
 375     ZeroMemory(pamt, sizeof(*pamt));
 376     ppiOutput->dir = PINDIR_OUTPUT;
 377     ppiOutput->pFilter = &This->Parser.filter.IBaseFilter_iface;
 378     wsprintfW(ppiOutput->achName, wszAudioStream);
 379
 380     pamt->formattype = FORMAT_WaveFormatEx;
 381     pamt->majortype = MEDIATYPE_Audio;
 382     pamt->subtype = MEDIASUBTYPE_MPEG1AudioPayload;
 383
 384     pamt->lSampleSize = 0;
 385     pamt->bFixedSizeSamples = FALSE;
 386     pamt->bTemporalCompression = 0;
 387
 388     mpeg1 = (header[1]>>4)&0x1;
 389     if (mpeg1)
 390         lsf = ((header[1]>>3)&0x1)^1;
 391
 392     layer         = 4-((header[1]>>1)&0x3);
 393     bitrate_index =   ((header[2]>>4)&0xf);
 394     freq_index    =   ((header[2]>>2)&0x3) + (mpeg1?(lsf*3):6);
 395     mode          =   ((header[3]>>6)&0x3);
 396     mode_ext      =   ((header[3]>>4)&0x3);
 397     emphasis      =   ((header[3]>>0)&0x3);
 398
 399     if (!bitrate_index)
 400     {
 401         /* Set to highest bitrate so samples will fit in for sure */
 402         FIXME("Variable-bitrate audio not fully supported.\n");
 403         bitrate_index = 15;
 404     }
 405
 406     pamt->cbFormat = ((layer==3)? sizeof(MPEGLAYER3WAVEFORMAT) :
 407                                   sizeof(MPEG1WAVEFORMAT));
 408     pamt->pbFormat = CoTaskMemAlloc(pamt->cbFormat);
 409     if (!pamt->pbFormat)
 410         return E_OUTOFMEMORY;
 411     ZeroMemory(pamt->pbFormat, pamt->cbFormat);
 412     format = (WAVEFORMATEX*)pamt->pbFormat;
 413
 414     format->wFormatTag      = ((layer == 3) ? WAVE_FORMAT_MPEGLAYER3 :
 415                                               WAVE_FORMAT_MPEG);
 416     format->nChannels       = ((mode == 3) ? 1 : 2);
 417     format->nSamplesPerSec  = freqs[freq_index];
 418     format->nAvgBytesPerSec = tabsel_123[lsf][layer-1][bitrate_index] * 1000 / 8;
 419
 420     if (layer == 3)
 421         format->nBlockAlign = format->nAvgBytesPerSec * 8 * 144 /
 422                               (format->nSamplesPerSec<<lsf) + 1;
 423     else if (layer == 2)
 424         format->nBlockAlign = format->nAvgBytesPerSec * 8 * 144 /
 425                               format->nSamplesPerSec + 1;
 426     else
 427         format->nBlockAlign = 4 * (format->nAvgBytesPerSec * 8 * 12 / format->nSamplesPerSec + 1);
 428
 429     format->wBitsPerSample = 0;
 430
 431     if (layer == 3)
 432     {
 433         MPEGLAYER3WAVEFORMAT *mp3format = (MPEGLAYER3WAVEFORMAT*)format;
 434
 435         format->cbSize = MPEGLAYER3_WFX_EXTRA_BYTES;
 436
 437         mp3format->wID = MPEGLAYER3_ID_MPEG;
 438         mp3format->fdwFlags = MPEGLAYER3_FLAG_PADDING_ON;
 439         mp3format->nBlockSize = format->nBlockAlign;
 440         mp3format->nFramesPerBlock = 1;
 441
 442         /* Beware the evil magic numbers. This struct is apparently horribly
 443          * under-documented, and the only references I could find had it being
 444          * set to this with no real explanation. It works fine though, so I'm
 445          * not complaining (yet).
 446          */
 447         mp3format->nCodecDelay = 1393;
 448     }
 449     else
 450     {
 451         MPEG1WAVEFORMAT *mpgformat = (MPEG1WAVEFORMAT*)format;
 452
 453         format->cbSize = 22;
 454
 455         mpgformat->fwHeadLayer   = ((layer == 1) ? ACM_MPEG_LAYER1 :
 456                                     ((layer == 2) ? ACM_MPEG_LAYER2 :
 457                                      ACM_MPEG_LAYER3));
 458         mpgformat->dwHeadBitrate = format->nAvgBytesPerSec * 8;
 459         mpgformat->fwHeadMode    = ((mode == 3) ? ACM_MPEG_SINGLECHANNEL :
 460                                     ((mode == 2) ? ACM_MPEG_DUALCHANNEL :
 461                                      ((mode == 1) ? ACM_MPEG_JOINTSTEREO :
 462                                       ACM_MPEG_STEREO)));
 463         mpgformat->fwHeadModeExt = ((mode == 1) ? 0x0F : (1<<mode_ext));
 464         mpgformat->wHeadEmphasis = emphasis + 1;
 465         mpgformat->fwHeadFlags   = ACM_MPEG_ID_MPEG1;
 466     }
 467     pamt->subtype.Data1 = format->wFormatTag;
 468
 469     TRACE("MPEG audio stream detected:\n"
 470           "\tLayer %d (%#x)\n"
 471           "\tFrequency: %d\n"
 472           "\tChannels: %d (%d)\n"
 473           "\tBytesPerSec: %d\n",
 474           layer, format->wFormatTag, format->nSamplesPerSec,
 475           format->nChannels, mode, format->nAvgBytesPerSec);
 476
 477     dump_AM_MEDIA_TYPE(pamt);
 478
 479     return S_OK;
 480 }
 481
 482
 483 static HRESULT MPEGSplitter_pre_connect(IPin *iface, IPin *pConnectPin, ALLOCATOR_PROPERTIES *props)
 484 {
 485     PullPin *pPin = impl_PullPin_from_IPin(iface);
 486     MPEGSplitterImpl *This = (MPEGSplitterImpl*)pPin->pin.pinInfo.pFilter;
 487     HRESULT hr;
 488     LONGLONG pos = 0; /* in bytes */
 489     BYTE header[10];
 490     int streamtype;
 491     LONGLONG total, avail;
 492     AM_MEDIA_TYPE amt;
 493     PIN_INFO piOutput;
 494
 495     IAsyncReader_Length(pPin->pReader, &total, &avail);
 496     This->EndOfFile = total;
 497
 498     hr = IAsyncReader_SyncRead(pPin->pReader, pos, 4, header);
 499     if (SUCCEEDED(hr))
 500         pos += 4;
 501
 502     /* Skip ID3 v2 tag, if any */
 503     if (SUCCEEDED(hr) && !memcmp("ID3", header, 3))
 504     do {
 505         UINT length = 0;
 506         hr = IAsyncReader_SyncRead(pPin->pReader, pos, 6, header + 4);
 507         if (FAILED(hr))
 508             break;
 509         pos += 6;
 510         TRACE("Found ID3 v2.%d.%d\n", header[3], header[4]);
 511         if(header[3] <= 4 && header[4] != 0xff &&
 512            (header[5]&0x0f) == 0 && (header[6]&0x80) == 0 &&
 513            (header[7]&0x80) == 0 && (header[8]&0x80) == 0 &&
 514            (header[9]&0x80) == 0)
 515         {
 516             length = (header[6]<<21) | (header[7]<<14) |
 517                      (header[8]<< 7) | (header[9]    );
 518             if((header[5]&0x10))
 519                 length += 10;
 520             TRACE("Length: %u\n", length);
 521         }
 522         pos += length;
 523
 524         /* Read the real header for the mpeg splitter */
 525         hr = IAsyncReader_SyncRead(pPin->pReader, pos, 4, header);
 526         if (SUCCEEDED(hr))
 527             pos += 4;
 528     } while (0);
 529
 530     while(SUCCEEDED(hr))
 531     {
 532         TRACE("Testing header %x:%x:%x:%x\n", header[0], header[1], header[2], header[3]);
 533
 534         streamtype = MPEGSplitter_head_check(header);
 535         if (streamtype == MPEG_AUDIO_HEADER)
 536         {
 537             LONGLONG length;
 538             if (parse_header(header, &length, NULL) == S_OK)
 539             {
 540                 BYTE next_header[4];
 541                 /* Ensure we have a valid header by seeking for the next frame, some bad
 542                  * encoded ID3v2 may have an incorrect length and we end up finding bytes
 543                  * like FF FE 00 28 which are nothing more than a Unicode BOM followed by
 544                  * ')' character from inside a ID3v2 tag. Unfortunately that sequence
 545                  * matches like a valid mpeg audio header.
 546                  */
 547                 hr = IAsyncReader_SyncRead(pPin->pReader, pos + length - 4, 4, next_header);
 548                 if (FAILED(hr))
 549                     break;
 550                 if (parse_header(next_header, &length, NULL) == S_OK)
 551                     break;
 552                 TRACE("%x:%x:%x:%x is a fake audio header, looking for next...\n",
 553                       header[0], header[1], header[2], header[3]);
 554             }
 555         }
 556         else if (streamtype) /* Video or System stream */
 557             break;
 558
 559         /* No valid header yet; shift by a byte and check again */
 560         memmove(header, header+1, 3);
 561         hr = IAsyncReader_SyncRead(pPin->pReader, pos++, 1, header + 3);
 562     }
 563     if (FAILED(hr))
 564         return hr;
 565     pos -= 4;
 566     This->begin_offset = pos;
 567     memcpy(This->header, header, 4);
 568
 569     switch(streamtype)
 570     {
 571         case MPEG_AUDIO_HEADER:
 572         {
 573             LONGLONG duration = 0;
 574             WAVEFORMATEX *format;
 575
 576             hr = MPEGSplitter_init_audio(This, header, &piOutput, &amt);
 577             if (SUCCEEDED(hr))
 578             {
 579                 format = (WAVEFORMATEX*)amt.pbFormat;
 580
 581                 props->cbAlign = 1;
 582                 props->cbPrefix = 0;
 583                 /* Make the output buffer a multiple of the frame size */
 584                 props->cbBuffer = 0x4000 / format->nBlockAlign *
 585                                  format->nBlockAlign;
 586                 props->cBuffers = 3;
 587                 hr = Parser_AddPin(&(This->Parser), &piOutput, props, &amt);
 588             }
 589
 590             if (FAILED(hr))
 591             {
 592                 CoTaskMemFree(amt.pbFormat);
 593                 ERR("Could not create pin for MPEG audio stream (%x)\n", hr);
 594                 break;
 595             }
 596
 597             /* Check for idv1 tag, and remove it from stream if found */
 598             hr = IAsyncReader_SyncRead(pPin->pReader, This->EndOfFile-128, 3, header);
 599             if (FAILED(hr))
 600                 break;
 601             if (!strncmp((char*)header, "TAG", 3))
 602                 This->EndOfFile -= 128;
 603             This->Parser.pInputPin->rtStop = MEDIATIME_FROM_BYTES(This->EndOfFile);
 604             This->Parser.pInputPin->rtStart = This->Parser.pInputPin->rtCurrent = MEDIATIME_FROM_BYTES(This->begin_offset);
 605
 606             duration = (This->EndOfFile-This->begin_offset) * 10000000 / format->nAvgBytesPerSec;
 607             TRACE("Duration: %d seconds\n", (DWORD)(duration / 10000000));
 608
 609             This->Parser.sourceSeeking.llCurrent = 0;
 610             This->Parser.sourceSeeking.llDuration = duration;
 611             This->Parser.sourceSeeking.llStop = duration;
 612             break;
 613         }
 614         case MPEG_VIDEO_HEADER:
 615             FIXME("MPEG video processing not yet supported!\n");
 616             hr = E_FAIL;
 617             break;
 618         case MPEG_SYSTEM_HEADER:
 619             FIXME("MPEG system streams not yet supported!\n");
 620             hr = E_FAIL;
 621             break;
 622
 623         default:
 624             break;
 625     }
 626     This->position = 0;
 627
 628     return hr;
 629 }
 630
 631 static HRESULT MPEGSplitter_cleanup(LPVOID iface)
 632 {
 633     MPEGSplitterImpl *This = iface;
 634
 635     TRACE("(%p)\n", This);
 636
 637     return S_OK;
 638 }
 639
 640 static HRESULT WINAPI MPEGSplitter_seek(IMediaSeeking *iface)
 641 {
 642     MPEGSplitterImpl *This = impl_from_IMediaSeeking(iface);
 643     PullPin *pPin = This->Parser.pInputPin;
 644     LONGLONG newpos, timepos, bytepos;
 645     HRESULT hr = E_INVALIDARG;
 646     BYTE header[4];
 647
 648     newpos = This->Parser.sourceSeeking.llCurrent;
 649     if (This->position/1000000 == newpos/1000000)
 650     {
 651         TRACE("Requesting position %x%08x same as current position %x%08x\n", (DWORD)(newpos>>32), (DWORD)newpos, (DWORD)(This->position>>32), (DWORD)This->position);
 652         return S_OK;
 653     }
 654
 655     bytepos = This->begin_offset;
 656     timepos = 0;
 657     /* http://mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm has a whole read up on audio headers */
 658     while (bytepos + 3 < This->EndOfFile)
 659     {
 660         LONGLONG duration = timepos;
 661         LONGLONG length = 0;
 662         hr = IAsyncReader_SyncRead(pPin->pReader, bytepos, 4, header);
 663         if (hr != S_OK)
 664             break;
 665         while ((hr=parse_header(header, &length, &duration)) != S_OK &&
 666                bytepos + 4 < This->EndOfFile)
 667         {
 668             /* No valid header yet; shift by a byte and check again */
 669             memmove(header, header+1, 3);
 670             hr = IAsyncReader_SyncRead(pPin->pReader, ++bytepos + 3, 1, header + 3);
 671             if (hr != S_OK)
 672                 break;
 673         }
 674         if (hr != S_OK || duration > newpos)
 675             break;
 676         bytepos += length;
 677         timepos = duration;
 678     }
 679
 680     if (SUCCEEDED(hr))
 681     {
 682         PullPin *pin = This->Parser.pInputPin;
 683
 684         TRACE("Moving sound to %08u bytes!\n", (DWORD)bytepos);
 685
 686         EnterCriticalSection(&pin->thread_lock);
 687         IPin_BeginFlush(&pin->pin.IPin_iface);
 688
 689         /* Make sure this is done while stopped, BeginFlush takes care of this */
 690         EnterCriticalSection(&This->Parser.filter.csFilter);
 691         memcpy(This->header, header, 4);
 692
 693         pin->rtStart = pin->rtCurrent = MEDIATIME_FROM_BYTES(bytepos);
 694         pin->rtStop = MEDIATIME_FROM_BYTES((REFERENCE_TIME)This->EndOfFile);
 695         This->seek = TRUE;
 696         This->position = newpos;
 697         LeaveCriticalSection(&This->Parser.filter.csFilter);
 698
 699         TRACE("Done flushing\n");
 700         IPin_EndFlush(&pin->pin.IPin_iface);
 701         LeaveCriticalSection(&pin->thread_lock);
 702     }
 703     return hr;
 704 }
 705
 706 static HRESULT MPEGSplitter_disconnect(LPVOID iface)
 707 {
 708     /* TODO: Find memory leaks etc */
 709     return S_OK;
 710 }
 711
 712 static HRESULT MPEGSplitter_first_request(LPVOID iface)
 713 {
 714     MPEGSplitterImpl *This = iface;
 715     PullPin *pin = This->Parser.pInputPin;
 716     HRESULT hr;
 717     LONGLONG length;
 718     IMediaSample *sample;
 719
 720     TRACE("Seeking? %d\n", This->seek);
 721
 722     hr = parse_header(This->header, &length, NULL);
 723     assert(hr == S_OK);
 724
 725     if (pin->rtCurrent >= pin->rtStop)
 726     {
 727         /* Last sample has already been queued, request nothing more */
 728         FIXME("Done!\n");
 729         return S_OK;
 730     }
 731
 732     hr = IMemAllocator_GetBuffer(pin->pAlloc, &sample, NULL, NULL, 0);
 733
 734     pin->rtNext = pin->rtCurrent;
 735     if (SUCCEEDED(hr))
 736     {
 737         LONGLONG rtSampleStart = pin->rtNext;
 738         /* Add 4 for the next header, which should hopefully work */
 739         LONGLONG rtSampleStop = rtSampleStart + MEDIATIME_FROM_BYTES(length + 4);
 740
 741         if (rtSampleStop > pin->rtStop)
 742             rtSampleStop = MEDIATIME_FROM_BYTES(ALIGNUP(BYTES_FROM_MEDIATIME(pin->rtStop), pin->cbAlign));
 743
 744         IMediaSample_SetTime(sample, &rtSampleStart, &rtSampleStop);
 745         IMediaSample_SetPreroll(sample, FALSE);
 746         IMediaSample_SetDiscontinuity(sample, TRUE);
 747         IMediaSample_SetSyncPoint(sample, 1);
 748         This->seek = FALSE;
 749
 750         hr = IAsyncReader_Request(pin->pReader, sample, 0);
 751         if (SUCCEEDED(hr))
 752         {
 753             pin->rtCurrent = pin->rtNext;
 754             pin->rtNext = rtSampleStop;
 755         }
 756         else
 757             IMediaSample_Release(sample);
 758     }
 759     if (FAILED(hr))
 760         ERR("Horsemen of the apocalypse came to bring error 0x%08x\n", hr);
 761
 762     return hr;
 763 }
 764
 765 static HRESULT WINAPI MPEGSplitter_QueryInterface(IBaseFilter *iface, REFIID riid, void **ppv)
 766 {
 767     MPEGSplitterImpl *This = impl_from_IBaseFilter(iface);
 768     TRACE("(%s, %p)\n", qzdebugstr_guid(riid), ppv);
 769
 770     *ppv = NULL;
 771
 772     if ( IsEqualIID(riid, &IID_IUnknown)
 773       || IsEqualIID(riid, &IID_IPersist)
 774       || IsEqualIID(riid, &IID_IMediaFilter)
 775       || IsEqualIID(riid, &IID_IBaseFilter) )
 776         *ppv = iface;
 777     else if ( IsEqualIID(riid, &IID_IAMStreamSelect) )
 778         *ppv = &This->IAMStreamSelect_iface;
 779
 780     if (*ppv)
 781     {
 782         IBaseFilter_AddRef(iface);
 783         return S_OK;
 784     }
 785
 786     if (!IsEqualIID(riid, &IID_IPin) && !IsEqualIID(riid, &IID_IVideoWindow))
 787         FIXME("No interface for %s!\n", qzdebugstr_guid(riid));
 788
 789     return E_NOINTERFACE;
 790 }
 791
 792 static const IBaseFilterVtbl MPEGSplitter_Vtbl =
 793 {
 794     MPEGSplitter_QueryInterface,
 795     Parser_AddRef,
 796     Parser_Release,
 797     Parser_GetClassID,
 798     Parser_Stop,
 799     Parser_Pause,
 800     Parser_Run,
 801     Parser_GetState,
 802     Parser_SetSyncSource,
 803     Parser_GetSyncSource,
 804     Parser_EnumPins,
 805     Parser_FindPin,
 806     Parser_QueryFilterInfo,
 807     Parser_JoinFilterGraph,
 808     Parser_QueryVendorInfo
 809 };
 810
 811 static HRESULT WINAPI AMStreamSelect_QueryInterface(IAMStreamSelect *iface, REFIID riid, void **ppv)
 812 {
 813     MPEGSplitterImpl *This = impl_from_IAMStreamSelect(iface);
 814
 815     return IBaseFilter_QueryInterface(&This->Parser.filter.IBaseFilter_iface, riid, ppv);
 816 }
 817
 818 static ULONG WINAPI AMStreamSelect_AddRef(IAMStreamSelect *iface)
 819 {
 820     MPEGSplitterImpl *This = impl_from_IAMStreamSelect(iface);
 821
 822     return IBaseFilter_AddRef(&This->Parser.filter.IBaseFilter_iface);
 823 }
 824
 825 static ULONG WINAPI AMStreamSelect_Release(IAMStreamSelect *iface)
 826 {
 827     MPEGSplitterImpl *This = impl_from_IAMStreamSelect(iface);
 828
 829     return IBaseFilter_Release(&This->Parser.filter.IBaseFilter_iface);
 830 }
 831
 832 static HRESULT WINAPI AMStreamSelect_Count(IAMStreamSelect *iface, DWORD *streams)
 833 {
 834     MPEGSplitterImpl *This = impl_from_IAMStreamSelect(iface);
 835
 836     FIXME("(%p/%p)->(%p) stub!\n", This, iface, streams);
 837
 838     return E_NOTIMPL;
 839 }
 840
 841 static HRESULT WINAPI AMStreamSelect_Info(IAMStreamSelect *iface, LONG index, AM_MEDIA_TYPE **media_type, DWORD *flags, LCID *lcid, DWORD *group, WCHAR **name, IUnknown **object, IUnknown **unknown)
 842 {
 843     MPEGSplitterImpl *This = impl_from_IAMStreamSelect(iface);
 844
 845     FIXME("(%p/%p)->(%d,%p,%p,%p,%p,%p,%p,%p) stub!\n", This, iface, index, media_type, flags, lcid, group, name, object, unknown);
 846
 847     return E_NOTIMPL;
 848 }
 849
 850 static HRESULT WINAPI AMStreamSelect_Enable(IAMStreamSelect *iface, LONG index, DWORD flags)
 851 {
 852     MPEGSplitterImpl *This = impl_from_IAMStreamSelect(iface);
 853
 854     FIXME("(%p/%p)->(%d,%x) stub!\n", This, iface, index, flags);
 855
 856     return E_NOTIMPL;
 857 }
 858
 859 static const IAMStreamSelectVtbl AMStreamSelectVtbl =
 860 {
 861     AMStreamSelect_QueryInterface,
 862     AMStreamSelect_AddRef,
 863     AMStreamSelect_Release,
 864     AMStreamSelect_Count,
 865     AMStreamSelect_Info,
 866     AMStreamSelect_Enable
 867 };
 868
 869 HRESULT MPEGSplitter_create(IUnknown * pUnkOuter, LPVOID * ppv)
 870 {
 871     MPEGSplitterImpl *This;
 872     HRESULT hr = E_FAIL;
 873
 874     TRACE("(%p, %p)\n", pUnkOuter, ppv);
 875
 876     *ppv = NULL;
 877
 878     if (pUnkOuter)
 879         return CLASS_E_NOAGGREGATION;
 880
 881     This = CoTaskMemAlloc(sizeof(MPEGSplitterImpl));
 882     if (!This)
 883         return E_OUTOFMEMORY;
 884
 885     ZeroMemory(This, sizeof(MPEGSplitterImpl));
 886     hr = Parser_Create(&(This->Parser), &MPEGSplitter_Vtbl, &CLSID_MPEG1Splitter, MPEGSplitter_process_sample, MPEGSplitter_query_accept, MPEGSplitter_pre_connect, MPEGSplitter_cleanup, MPEGSplitter_disconnect, MPEGSplitter_first_request, NULL, NULL, MPEGSplitter_seek, NULL);
 887     if (FAILED(hr))
 888     {
 889         CoTaskMemFree(This);
 890         return hr;
 891     }
 892     This->IAMStreamSelect_iface.lpVtbl = &AMStreamSelectVtbl;
 893     This->seek = TRUE;
 894
 895     /* Note: This memory is managed by the parser filter once created */
 896     *ppv = &This->Parser.filter.IBaseFilter_iface;
 897
 898     return hr;
 899 }