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 "control_private.h"
  29 #include "pin.h"
  30
  31 #include "uuids.h"
  32 #include "mmreg.h"
  33 #include "mmsystem.h"
  34
  35 #include "winternl.h"
  36
  37 #include "wine/unicode.h"
  38 #include "wine/debug.h"
  39
  40 #include "parser.h"
  41
  42 WINE_DEFAULT_DEBUG_CHANNEL(quartz);
  43
  44 #define SEQUENCE_HEADER_CODE     0xB3
  45 #define PACK_START_CODE          0xBA
  46
  47 #define SYSTEM_START_CODE        0xBB
  48 #define AUDIO_ELEMENTARY_STREAM  0xC0
  49 #define VIDEO_ELEMENTARY_STREAM  0xE0
  50
  51 #define MPEG_SYSTEM_HEADER 3
  52 #define MPEG_VIDEO_HEADER 2
  53 #define MPEG_AUDIO_HEADER 1
  54 #define MPEG_NO_HEADER 0
  55
  56 #define SEEK_INTERVAL (ULONGLONG)(10 * 10000000) /* Add an entry every 10 seconds */
  57
  58 struct seek_entry {
  59     ULONGLONG bytepos;
  60     ULONGLONG timepos;
  61 };
  62
  63 typedef struct MPEGSplitterImpl
  64 {
  65     ParserImpl Parser;
  66     LONGLONG EndOfFile;
  67     LONGLONG duration;
  68     LONGLONG position;
  69     DWORD begin_offset;
  70     BYTE header[4];
  71
  72     /* Whether we just seeked (or started playing) */
  73     BOOL seek;
  74
  75     /* Seeking cache */
  76     ULONG seek_entries;
  77     struct seek_entry *seektable;
  78 } MPEGSplitterImpl;
  79
  80 static inline MPEGSplitterImpl *impl_from_IMediaSeeking( IMediaSeeking *iface )
  81 {
  82     return (MPEGSplitterImpl *)((char*)iface - FIELD_OFFSET(MPEGSplitterImpl, Parser.sourceSeeking.lpVtbl));
  83 }
  84
  85 static int MPEGSplitter_head_check(const BYTE *header)
  86 {
  87     /* If this is a possible start code, check for a system or video header */
  88     if (header[0] == 0 && header[1] == 0 && header[2] == 1)
  89     {
  90         /* Check if we got a system or elementary stream start code */
  91         if (header[3] == PACK_START_CODE ||
  92             header[3] == VIDEO_ELEMENTARY_STREAM ||
  93             header[3] == AUDIO_ELEMENTARY_STREAM)
  94             return MPEG_SYSTEM_HEADER;
  95
  96         /* Check for a MPEG video sequence start code */
  97         if (header[3] == SEQUENCE_HEADER_CODE)
  98             return MPEG_VIDEO_HEADER;
  99     }
 100
 101     /* This should give a good guess if we have an MPEG audio header */
 102     if(header[0] == 0xff && ((header[1]>>5)&0x7) == 0x7 &&
 103        ((header[1]>>1)&0x3) != 0 && ((header[2]>>4)&0xf) != 0xf &&
 104        ((header[2]>>2)&0x3) != 0x3)
 105         return MPEG_AUDIO_HEADER;
 106
 107     /* Nothing yet.. */
 108     return MPEG_NO_HEADER;
 109 }
 110
 111 static const WCHAR wszAudioStream[] = {'A','u','d','i','o',0};
 112 static const WCHAR wszVideoStream[] = {'V','i','d','e','o',0};
 113
 114 static const DWORD freqs[10] = { 44100, 48000, 32000, 22050, 24000, 16000, 11025, 12000,  8000, 0 };
 115
 116 static const DWORD tabsel_123[2][3][16] = {
 117     { {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,},
 118       {0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,},
 119       {0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,} },
 120
 121     { {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,},
 122       {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,},
 123       {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,} }
 124 };
 125
 126 static HRESULT parse_header(BYTE *header, LONGLONG *plen, LONGLONG *pduration)
 127 {
 128     LONGLONG duration;
 129
 130     int bitrate_index, freq_index, lsf = 1, mpeg1, layer, padding, bitrate, length;
 131     if (header[0] != 0xff)
 132         return E_INVALIDARG;
 133
 134     if (!(((header[1]>>5)&0x7) == 0x7 &&
 135        ((header[1]>>1)&0x3) != 0 && ((header[2]>>4)&0xf) != 0xf &&
 136        ((header[2]>>2)&0x3) != 0x3))
 137     {
 138         FIXME("Not a valid header: %02x:%02x\n", header[1], header[2]);
 139         return E_INVALIDARG;
 140     }
 141
 142     mpeg1 = (header[1]>>4)&0x1;
 143     if (mpeg1)
 144         lsf = ((header[1]>>3)&0x1)^1;
 145
 146     layer = 4-((header[1]>>1)&0x3);
 147     bitrate_index = ((header[2]>>4)&0xf);
 148     freq_index = ((header[2]>>2)&0x3) + (mpeg1?(lsf*3):6);
 149     padding = ((header[2]>>1)&0x1);
 150
 151     bitrate = tabsel_123[lsf][layer-1][bitrate_index] * 1000;
 152     if (!bitrate)
 153     {
 154         FIXME("Not a valid header: %02x:%02x:%02x:%02x\n", header[0], header[1], header[2], header[3]);
 155         return E_INVALIDARG;
 156     }
 157
 158
 159     if (layer == 3 || layer == 2)
 160         length = 144 * bitrate / freqs[freq_index] + padding;
 161     else
 162         length = 4 * (12 * bitrate / freqs[freq_index] + padding);
 163
 164     duration = (ULONGLONG)10000000 * (ULONGLONG)(length) / (ULONGLONG)(bitrate/8);
 165     *plen = length;
 166     if (pduration)
 167         *pduration += duration;
 168     return S_OK;
 169 }
 170
 171 static HRESULT FillBuffer(MPEGSplitterImpl *This, IMediaSample *pCurrentSample)
 172 {
 173     Parser_OutputPin * pOutputPin = (Parser_OutputPin*)This->Parser.ppPins[1];
 174     LONGLONG length = 0;
 175     LONGLONG pos = BYTES_FROM_MEDIATIME(This->Parser.pInputPin->rtNext);
 176     LONGLONG time = This->position, rtstop, rtstart;
 177     HRESULT hr;
 178     BYTE *fbuf = NULL;
 179     DWORD len = IMediaSample_GetActualDataLength(pCurrentSample);
 180
 181     TRACE("Source length: %u\n", len);
 182     IMediaSample_GetPointer(pCurrentSample, &fbuf);
 183
 184     /* Find the next valid header.. it <SHOULD> be right here */
 185     hr = parse_header(fbuf, &length, &This->position);
 186     assert(hr == S_OK);
 187     IMediaSample_SetActualDataLength(pCurrentSample, length);
 188
 189     /* Queue the next sample */
 190     if (length + 4 == len)
 191     {
 192         PullPin *pin = This->Parser.pInputPin;
 193         LONGLONG stop = BYTES_FROM_MEDIATIME(pin->rtStop);
 194
 195         hr = S_OK;
 196         memcpy(This->header, fbuf + length, 4);
 197         while (FAILED(hr = parse_header(This->header, &length, NULL)))
 198         {
 199             memmove(This->header, This->header+1, 3);
 200             if (pos + 4 >= stop)
 201                 break;
 202             IAsyncReader_SyncRead(pin->pReader, ++pos, 1, This->header + 3);
 203         }
 204         pin->rtNext = MEDIATIME_FROM_BYTES(pos);
 205
 206         if (SUCCEEDED(hr))
 207         {
 208             /* Remove 4 for the last header, which should hopefully work */
 209             IMediaSample *sample = NULL;
 210             LONGLONG rtSampleStart = pin->rtNext - MEDIATIME_FROM_BYTES(4);
 211             LONGLONG rtSampleStop = rtSampleStart + MEDIATIME_FROM_BYTES(length + 4);
 212
 213             if (rtSampleStop > pin->rtStop)
 214                 rtSampleStop = MEDIATIME_FROM_BYTES(ALIGNUP(BYTES_FROM_MEDIATIME(pin->rtStop), pin->cbAlign));
 215
 216             hr = IMemAllocator_GetBuffer(pin->pAlloc, &sample, NULL, NULL, 0);
 217             if (SUCCEEDED(hr))
 218             {
 219                 IMediaSample_SetTime(sample, &rtSampleStart, &rtSampleStop);
 220                 IMediaSample_SetPreroll(sample, 0);
 221                 IMediaSample_SetDiscontinuity(sample, 0);
 222                 IMediaSample_SetSyncPoint(sample, 1);
 223                 hr = IAsyncReader_Request(pin->pReader, sample, 0);
 224                 if (SUCCEEDED(hr))
 225                 {
 226                     pin->rtCurrent = rtSampleStart;
 227                     pin->rtNext = rtSampleStop;
 228                 }
 229                 else
 230                     IMediaSample_Release(sample);
 231             }
 232             if (FAILED(hr))
 233                 FIXME("o_Ox%08x\n", hr);
 234         }
 235     }
 236     /* If not, we're presumably at the end of file */
 237
 238     TRACE("Media time : %u.%03u\n", (DWORD)(This->position/10000000), (DWORD)((This->position/10000)%1000));
 239
 240     if (IMediaSample_IsDiscontinuity(pCurrentSample) == S_OK) {
 241         IPin *victim;
 242         EnterCriticalSection(&This->Parser.filter.csFilter);
 243         pOutputPin->pin.pin.tStart = time;
 244         pOutputPin->pin.pin.dRate = This->Parser.sourceSeeking.dRate;
 245         hr = IPin_ConnectedTo((IPin *)pOutputPin, &victim);
 246         if (hr == S_OK)
 247         {
 248             hr = IPin_NewSegment(victim, time, This->Parser.sourceSeeking.llStop,
 249                                  This->Parser.sourceSeeking.dRate);
 250             if (hr != S_OK)
 251                 FIXME("NewSegment returns %08x\n", hr);
 252             IPin_Release(victim);
 253         }
 254         LeaveCriticalSection(&This->Parser.filter.csFilter);
 255         if (hr != S_OK)
 256             return hr;
 257     }
 258     rtstart = (double)(time - pOutputPin->pin.pin.tStart) / pOutputPin->pin.pin.dRate;
 259     rtstop = (double)(This->position - pOutputPin->pin.pin.tStart) / pOutputPin->pin.pin.dRate;
 260     IMediaSample_SetTime(pCurrentSample, &rtstart, &rtstop);
 261     IMediaSample_SetMediaTime(pCurrentSample, &time, &This->position);
 262
 263     hr = BaseOutputPinImpl_Deliver((BaseOutputPin*)&pOutputPin->pin, pCurrentSample);
 264
 265     if (hr != S_OK)
 266     {
 267         if (hr != S_FALSE)
 268             TRACE("Error sending sample (%x)\n", hr);
 269         else
 270             TRACE("S_FALSE (%d), holding\n", IMediaSample_GetActualDataLength(pCurrentSample));
 271     }
 272
 273     return hr;
 274 }
 275
 276
 277 static HRESULT MPEGSplitter_process_sample(LPVOID iface, IMediaSample * pSample, DWORD_PTR cookie)
 278 {
 279     MPEGSplitterImpl *This = iface;
 280     BYTE *pbSrcStream;
 281     DWORD cbSrcStream = 0;
 282     REFERENCE_TIME tStart, tStop, tAviStart = This->position;
 283     HRESULT hr;
 284
 285     hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
 286     if (SUCCEEDED(hr))
 287     {
 288         cbSrcStream = IMediaSample_GetActualDataLength(pSample);
 289         hr = IMediaSample_GetPointer(pSample, &pbSrcStream);
 290     }
 291
 292     /* Flush occurring */
 293     if (cbSrcStream == 0)
 294     {
 295         FIXME(".. Why do I need you?\n");
 296         return S_OK;
 297     }
 298
 299     /* trace removed for performance reasons */
 300     /* TRACE("(%p), %llu -> %llu\n", pSample, tStart, tStop); */
 301
 302     /* Now, try to find a new header */
 303     hr = FillBuffer(This, pSample);
 304     if (hr != S_OK)
 305     {
 306         WARN("Failed with hres: %08x!\n", hr);
 307
 308         /* Unset progression if denied! */
 309         if (hr == VFW_E_WRONG_STATE || hr == S_FALSE)
 310         {
 311             memcpy(This->header, pbSrcStream, 4);
 312             This->Parser.pInputPin->rtCurrent = tStart;
 313             This->position = tAviStart;
 314         }
 315     }
 316
 317     if (BYTES_FROM_MEDIATIME(tStop) >= This->EndOfFile || This->position >= This->Parser.sourceSeeking.llStop)
 318     {
 319         unsigned int i;
 320
 321         TRACE("End of file reached\n");
 322
 323         for (i = 0; i < This->Parser.cStreams; i++)
 324         {
 325             IPin* ppin;
 326
 327             hr = IPin_ConnectedTo(This->Parser.ppPins[i+1], &ppin);
 328             if (SUCCEEDED(hr))
 329             {
 330                 hr = IPin_EndOfStream(ppin);
 331                 IPin_Release(ppin);
 332             }
 333             if (FAILED(hr))
 334                 WARN("Error sending EndOfStream to pin %u (%x)\n", i, hr);
 335         }
 336
 337         /* Force the pullpin thread to stop */
 338         hr = S_FALSE;
 339     }
 340
 341     return hr;
 342 }
 343
 344
 345 static HRESULT MPEGSplitter_query_accept(LPVOID iface, const AM_MEDIA_TYPE *pmt)
 346 {
 347     if (!IsEqualIID(&pmt->majortype, &MEDIATYPE_Stream))
 348         return S_FALSE;
 349
 350     if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1Audio))
 351         return S_OK;
 352
 353     if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1Video))
 354         FIXME("MPEG-1 video streams not yet supported.\n");
 355     else if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1System))
 356         FIXME("MPEG-1 system streams not yet supported.\n");
 357     else if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1VideoCD))
 358         FIXME("MPEG-1 VideoCD streams not yet supported.\n");
 359     else FIXME("%s\n", debugstr_guid(&pmt->subtype));
 360
 361     return S_FALSE;
 362 }
 363
 364
 365 static HRESULT MPEGSplitter_init_audio(MPEGSplitterImpl *This, const BYTE *header, PIN_INFO *ppiOutput, AM_MEDIA_TYPE *pamt)
 366 {
 367     WAVEFORMATEX *format;
 368     int bitrate_index;
 369     int freq_index;
 370     int mode_ext;
 371     int emphasis;
 372     int lsf = 1;
 373     int mpeg1;
 374     int layer;
 375     int mode;
 376
 377     ZeroMemory(pamt, sizeof(*pamt));
 378     ppiOutput->dir = PINDIR_OUTPUT;
 379     ppiOutput->pFilter = (IBaseFilter*)This;
 380     wsprintfW(ppiOutput->achName, wszAudioStream);
 381
 382     pamt->formattype = FORMAT_WaveFormatEx;
 383     pamt->majortype = MEDIATYPE_Audio;
 384     pamt->subtype = MEDIASUBTYPE_MPEG1AudioPayload;
 385
 386     pamt->lSampleSize = 0;
 387     pamt->bFixedSizeSamples = FALSE;
 388     pamt->bTemporalCompression = 0;
 389
 390     mpeg1 = (header[1]>>4)&0x1;
 391     if (mpeg1)
 392         lsf = ((header[1]>>3)&0x1)^1;
 393
 394     layer         = 4-((header[1]>>1)&0x3);
 395     bitrate_index =   ((header[2]>>4)&0xf);
 396     freq_index    =   ((header[2]>>2)&0x3) + (mpeg1?(lsf*3):6);
 397     mode          =   ((header[3]>>6)&0x3);
 398     mode_ext      =   ((header[3]>>4)&0x3);
 399     emphasis      =   ((header[3]>>0)&0x3);
 400
 401     if (!bitrate_index)
 402     {
 403         /* Set to highest bitrate so samples will fit in for sure */
 404         FIXME("Variable-bitrate audio not fully supported.\n");
 405         bitrate_index = 15;
 406     }
 407
 408     pamt->cbFormat = ((layer==3)? sizeof(MPEGLAYER3WAVEFORMAT) :
 409                                   sizeof(MPEG1WAVEFORMAT));
 410     pamt->pbFormat = CoTaskMemAlloc(pamt->cbFormat);
 411     if (!pamt->pbFormat)
 412         return E_OUTOFMEMORY;
 413     ZeroMemory(pamt->pbFormat, pamt->cbFormat);
 414     format = (WAVEFORMATEX*)pamt->pbFormat;
 415
 416     format->wFormatTag      = ((layer == 3) ? WAVE_FORMAT_MPEGLAYER3 :
 417                                               WAVE_FORMAT_MPEG);
 418     format->nChannels       = ((mode == 3) ? 1 : 2);
 419     format->nSamplesPerSec  = freqs[freq_index];
 420     format->nAvgBytesPerSec = tabsel_123[lsf][layer-1][bitrate_index] * 1000 / 8;
 421
 422     if (layer == 3)
 423         format->nBlockAlign = format->nAvgBytesPerSec * 8 * 144 /
 424                               (format->nSamplesPerSec<<lsf) + 1;
 425     else if (layer == 2)
 426         format->nBlockAlign = format->nAvgBytesPerSec * 8 * 144 /
 427                               format->nSamplesPerSec + 1;
 428     else
 429         format->nBlockAlign = 4 * (format->nAvgBytesPerSec * 8 * 12 / format->nSamplesPerSec + 1);
 430
 431     format->wBitsPerSample = 0;
 432
 433     if (layer == 3)
 434     {
 435         MPEGLAYER3WAVEFORMAT *mp3format = (MPEGLAYER3WAVEFORMAT*)format;
 436
 437         format->cbSize = MPEGLAYER3_WFX_EXTRA_BYTES;
 438
 439         mp3format->wID = MPEGLAYER3_ID_MPEG;
 440         mp3format->fdwFlags = MPEGLAYER3_FLAG_PADDING_ON;
 441         mp3format->nBlockSize = format->nBlockAlign;
 442         mp3format->nFramesPerBlock = 1;
 443
 444         /* Beware the evil magic numbers. This struct is apparently horribly
 445          * under-documented, and the only references I could find had it being
 446          * set to this with no real explanation. It works fine though, so I'm
 447          * not complaining (yet).
 448          */
 449         mp3format->nCodecDelay = 1393;
 450     }
 451     else
 452     {
 453         MPEG1WAVEFORMAT *mpgformat = (MPEG1WAVEFORMAT*)format;
 454
 455         format->cbSize = 22;
 456
 457         mpgformat->fwHeadLayer   = ((layer == 1) ? ACM_MPEG_LAYER1 :
 458                                     ((layer == 2) ? ACM_MPEG_LAYER2 :
 459                                      ACM_MPEG_LAYER3));
 460         mpgformat->dwHeadBitrate = format->nAvgBytesPerSec * 8;
 461         mpgformat->fwHeadMode    = ((mode == 3) ? ACM_MPEG_SINGLECHANNEL :
 462                                     ((mode == 2) ? ACM_MPEG_DUALCHANNEL :
 463                                      ((mode == 1) ? ACM_MPEG_JOINTSTEREO :
 464                                       ACM_MPEG_STEREO)));
 465         mpgformat->fwHeadModeExt = ((mode == 1) ? 0x0F : (1<<mode_ext));
 466         mpgformat->wHeadEmphasis = emphasis + 1;
 467         mpgformat->fwHeadFlags   = ACM_MPEG_ID_MPEG1;
 468     }
 469     pamt->subtype.Data1 = format->wFormatTag;
 470
 471     TRACE("MPEG audio stream detected:\n"
 472           "\tLayer %d (%#x)\n"
 473           "\tFrequency: %d\n"
 474           "\tChannels: %d (%d)\n"
 475           "\tBytesPerSec: %d\n",
 476           layer, format->wFormatTag, format->nSamplesPerSec,
 477           format->nChannels, mode, format->nAvgBytesPerSec);
 478
 479     dump_AM_MEDIA_TYPE(pamt);
 480
 481     return S_OK;
 482 }
 483
 484
 485 static HRESULT MPEGSplitter_pre_connect(IPin *iface, IPin *pConnectPin, ALLOCATOR_PROPERTIES *props)
 486 {
 487     PullPin *pPin = (PullPin *)iface;
 488     MPEGSplitterImpl *This = (MPEGSplitterImpl*)pPin->pin.pinInfo.pFilter;
 489     HRESULT hr;
 490     LONGLONG pos = 0; /* in bytes */
 491     BYTE header[10];
 492     int streamtype = 0;
 493     LONGLONG total, avail;
 494     AM_MEDIA_TYPE amt;
 495     PIN_INFO piOutput;
 496
 497     IAsyncReader_Length(pPin->pReader, &total, &avail);
 498     This->EndOfFile = total;
 499
 500     hr = IAsyncReader_SyncRead(pPin->pReader, pos, 4, header);
 501     if (SUCCEEDED(hr))
 502         pos += 4;
 503
 504     /* Skip ID3 v2 tag, if any */
 505     if (SUCCEEDED(hr) && !memcmp("ID3", header, 3))
 506     do {
 507         UINT length;
 508         hr = IAsyncReader_SyncRead(pPin->pReader, pos, 6, header + 4);
 509         if (FAILED(hr))
 510             break;
 511         pos += 6;
 512         TRACE("Found ID3 v2.%d.%d\n", header[3], header[4]);
 513         length  = (header[6] & 0x7F) << 21;
 514         length += (header[7] & 0x7F) << 14;
 515         length += (header[8] & 0x7F) << 7;
 516         length += (header[9] & 0x7F);
 517         TRACE("Length: %u\n", length);
 518         pos += length;
 519
 520         /* Read the real header for the mpeg splitter */
 521         hr = IAsyncReader_SyncRead(pPin->pReader, pos, 4, header);
 522         if (SUCCEEDED(hr))
 523             pos += 4;
 524         TRACE("%x:%x:%x:%x\n", header[0], header[1], header[2], header[3]);
 525     } while (0);
 526
 527     while(SUCCEEDED(hr) && !(streamtype=MPEGSplitter_head_check(header)))
 528     {
 529         TRACE("%x:%x:%x:%x\n", header[0], header[1], header[2], header[3]);
 530         /* No valid header yet; shift by a byte and check again */
 531         memmove(header, header+1, 3);
 532         hr = IAsyncReader_SyncRead(pPin->pReader, pos++, 1, header + 3);
 533     }
 534     if (FAILED(hr))
 535         return hr;
 536     pos -= 4;
 537     This->begin_offset = pos;
 538     memcpy(This->header, header, 4);
 539
 540     This->seektable[0].bytepos = pos;
 541     This->seektable[0].timepos = 0;
 542
 543     switch(streamtype)
 544     {
 545         case MPEG_AUDIO_HEADER:
 546         {
 547             LONGLONG duration = 0;
 548             DWORD last_entry = 0;
 549
 550             DWORD ticks = GetTickCount();
 551
 552             hr = MPEGSplitter_init_audio(This, header, &piOutput, &amt);
 553             if (SUCCEEDED(hr))
 554             {
 555                 WAVEFORMATEX *format = (WAVEFORMATEX*)amt.pbFormat;
 556
 557                 props->cbAlign = 1;
 558                 props->cbPrefix = 0;
 559                 /* Make the output buffer a multiple of the frame size */
 560                 props->cbBuffer = 0x4000 / format->nBlockAlign *
 561                                  format->nBlockAlign;
 562                 props->cBuffers = 3;
 563                 hr = Parser_AddPin(&(This->Parser), &piOutput, props, &amt);
 564             }
 565
 566             if (FAILED(hr))
 567             {
 568                 if (amt.pbFormat)
 569                     CoTaskMemFree(amt.pbFormat);
 570                 ERR("Could not create pin for MPEG audio stream (%x)\n", hr);
 571                 break;
 572             }
 573
 574             /* Check for idv1 tag, and remove it from stream if found */
 575             hr = IAsyncReader_SyncRead(pPin->pReader, This->EndOfFile-128, 3, header+4);
 576             if (FAILED(hr))
 577                 break;
 578             if (!strncmp((char*)header+4, "TAG", 3))
 579                 This->EndOfFile -= 128;
 580             This->Parser.pInputPin->rtStop = MEDIATIME_FROM_BYTES(This->EndOfFile);
 581             This->Parser.pInputPin->rtStart = This->Parser.pInputPin->rtCurrent = MEDIATIME_FROM_BYTES(This->begin_offset);
 582
 583             /* http://mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm has a whole read up on audio headers */
 584             while (pos + 3 < This->EndOfFile)
 585             {
 586                 LONGLONG length = 0;
 587                 hr = IAsyncReader_SyncRead(pPin->pReader, pos, 4, header);
 588                 if (hr != S_OK)
 589                     break;
 590                 while (parse_header(header, &length, &duration))
 591                 {
 592                     /* No valid header yet; shift by a byte and check again */
 593                     memmove(header, header+1, 3);
 594                     hr = IAsyncReader_SyncRead(pPin->pReader, pos++, 1, header + 3);
 595                     if (hr != S_OK || This->EndOfFile - pos < 4)
 596                        break;
 597                 }
 598                 pos += length;
 599
 600                 if (This->seektable && (duration / SEEK_INTERVAL) > last_entry)
 601                 {
 602                     if (last_entry + 1 > duration / SEEK_INTERVAL)
 603                     {
 604                         ERR("Somehow skipped %d interval lengths instead of 1\n", (DWORD)(duration/SEEK_INTERVAL) - (last_entry + 1));
 605                     }
 606                     ++last_entry;
 607
 608                     TRACE("Entry: %u\n", last_entry);
 609                     if (last_entry >= This->seek_entries)
 610                     {
 611                         This->seek_entries += 64;
 612                         This->seektable = CoTaskMemRealloc(This->seektable, (This->seek_entries)*sizeof(struct seek_entry));
 613                     }
 614                     This->seektable[last_entry].bytepos = pos;
 615                     This->seektable[last_entry].timepos = duration;
 616                 }
 617
 618                 TRACE("Pos: %x%08x/%x%08x\n", (DWORD)(pos >> 32), (DWORD)pos, (DWORD)(This->EndOfFile>>32), (DWORD)This->EndOfFile);
 619             }
 620             hr = S_OK;
 621             TRACE("Duration: %d seconds\n", (DWORD)(duration / 10000000));
 622             TRACE("Parsing took %u ms\n", GetTickCount() - ticks);
 623             This->duration = duration;
 624
 625             This->Parser.sourceSeeking.llCurrent = 0;
 626             This->Parser.sourceSeeking.llDuration = duration;
 627             This->Parser.sourceSeeking.llStop = duration;
 628             break;
 629         }
 630         case MPEG_VIDEO_HEADER:
 631             FIXME("MPEG video processing not yet supported!\n");
 632             hr = E_FAIL;
 633             break;
 634         case MPEG_SYSTEM_HEADER:
 635             FIXME("MPEG system streams not yet supported!\n");
 636             hr = E_FAIL;
 637             break;
 638
 639         default:
 640             break;
 641     }
 642     This->position = 0;
 643
 644     return hr;
 645 }
 646
 647 static HRESULT MPEGSplitter_cleanup(LPVOID iface)
 648 {
 649     MPEGSplitterImpl *This = iface;
 650
 651     TRACE("(%p)\n", This);
 652
 653     return S_OK;
 654 }
 655
 656 static HRESULT WINAPI MPEGSplitter_seek(IMediaSeeking *iface)
 657 {
 658     MPEGSplitterImpl *This = impl_from_IMediaSeeking(iface);
 659     PullPin *pPin = This->Parser.pInputPin;
 660     LONGLONG newpos, timepos, bytepos;
 661     HRESULT hr = S_OK;
 662     BYTE header[4];
 663
 664     newpos = This->Parser.sourceSeeking.llCurrent;
 665
 666     if (newpos > This->duration)
 667     {
 668         WARN("Requesting position %x%08x beyond end of stream %x%08x\n", (DWORD)(newpos>>32), (DWORD)newpos, (DWORD)(This->duration>>32), (DWORD)This->duration);
 669         return E_INVALIDARG;
 670     }
 671
 672     if (This->position/1000000 == newpos/1000000)
 673     {
 674         TRACE("Requesting position %x%08x same as current position %x%08x\n", (DWORD)(newpos>>32), (DWORD)newpos, (DWORD)(This->position>>32), (DWORD)This->position);
 675         return S_OK;
 676     }
 677
 678     /* Position, cached */
 679     bytepos = This->seektable[newpos / SEEK_INTERVAL].bytepos;
 680     timepos = This->seektable[newpos / SEEK_INTERVAL].timepos;
 681
 682     hr = IAsyncReader_SyncRead(pPin->pReader, bytepos, 4, header);
 683     while (bytepos + 3 < This->EndOfFile)
 684     {
 685         LONGLONG length = 0;
 686         hr = IAsyncReader_SyncRead(pPin->pReader, bytepos, 4, header);
 687         if (hr != S_OK || timepos >= newpos)
 688             break;
 689
 690         while (parse_header(header, &length, &timepos) && bytepos + 3 < This->EndOfFile)
 691         {
 692             /* No valid header yet; shift by a byte and check again */
 693             memmove(header, header+1, 3);
 694             hr = IAsyncReader_SyncRead(pPin->pReader, ++bytepos, 1, header + 3);
 695             if (hr != S_OK)
 696                 break;
 697          }
 698          bytepos += length;
 699          TRACE("Pos: %x%08x/%x%08x\n", (DWORD)(bytepos >> 32), (DWORD)bytepos, (DWORD)(This->EndOfFile>>32), (DWORD)This->EndOfFile);
 700     }
 701
 702     if (SUCCEEDED(hr))
 703     {
 704         PullPin *pin = This->Parser.pInputPin;
 705
 706         TRACE("Moving sound to %08u bytes!\n", (DWORD)bytepos);
 707
 708         EnterCriticalSection(&pin->thread_lock);
 709         IPin_BeginFlush((IPin *)pin);
 710
 711         /* Make sure this is done while stopped, BeginFlush takes care of this */
 712         EnterCriticalSection(&This->Parser.filter.csFilter);
 713         memcpy(This->header, header, 4);
 714
 715         pin->rtStart = pin->rtCurrent = MEDIATIME_FROM_BYTES(bytepos);
 716         pin->rtStop = MEDIATIME_FROM_BYTES((REFERENCE_TIME)This->EndOfFile);
 717         This->seek = TRUE;
 718         This->position = newpos;
 719         LeaveCriticalSection(&This->Parser.filter.csFilter);
 720
 721         TRACE("Done flushing\n");
 722         IPin_EndFlush((IPin *)pin);
 723         LeaveCriticalSection(&pin->thread_lock);
 724     }
 725     return hr;
 726 }
 727
 728 static HRESULT MPEGSplitter_disconnect(LPVOID iface)
 729 {
 730     /* TODO: Find memory leaks etc */
 731     return S_OK;
 732 }
 733
 734 static HRESULT MPEGSplitter_first_request(LPVOID iface)
 735 {
 736     MPEGSplitterImpl *This = iface;
 737     PullPin *pin = This->Parser.pInputPin;
 738     HRESULT hr;
 739     LONGLONG length;
 740     IMediaSample *sample;
 741
 742     TRACE("Seeking? %d\n", This->seek);
 743
 744     hr = parse_header(This->header, &length, NULL);
 745     assert(hr == S_OK);
 746
 747     if (pin->rtCurrent >= pin->rtStop)
 748     {
 749         /* Last sample has already been queued, request nothing more */
 750         FIXME("Done!\n");
 751         return S_OK;
 752     }
 753
 754     hr = IMemAllocator_GetBuffer(pin->pAlloc, &sample, NULL, NULL, 0);
 755
 756     pin->rtNext = pin->rtCurrent;
 757     if (SUCCEEDED(hr))
 758     {
 759         LONGLONG rtSampleStart = pin->rtNext;
 760         /* Add 4 for the next header, which should hopefully work */
 761         LONGLONG rtSampleStop = rtSampleStart + MEDIATIME_FROM_BYTES(length + 4);
 762
 763         if (rtSampleStop > pin->rtStop)
 764             rtSampleStop = MEDIATIME_FROM_BYTES(ALIGNUP(BYTES_FROM_MEDIATIME(pin->rtStop), pin->cbAlign));
 765
 766         hr = IMediaSample_SetTime(sample, &rtSampleStart, &rtSampleStop);
 767
 768         IMediaSample_SetPreroll(sample, FALSE);
 769         IMediaSample_SetDiscontinuity(sample, TRUE);
 770         IMediaSample_SetSyncPoint(sample, 1);
 771         This->seek = 0;
 772
 773         hr = IAsyncReader_Request(pin->pReader, sample, 0);
 774         if (SUCCEEDED(hr))
 775         {
 776             pin->rtCurrent = pin->rtNext;
 777             pin->rtNext = rtSampleStop;
 778         }
 779         else
 780             IMediaSample_Release(sample);
 781     }
 782     if (FAILED(hr))
 783         ERR("Horsemen of the apocalypse came to bring error 0x%08x\n", hr);
 784
 785     return hr;
 786 }
 787
 788 static const IBaseFilterVtbl MPEGSplitter_Vtbl =
 789 {
 790     Parser_QueryInterface,
 791     Parser_AddRef,
 792     Parser_Release,
 793     Parser_GetClassID,
 794     Parser_Stop,
 795     Parser_Pause,
 796     Parser_Run,
 797     Parser_GetState,
 798     Parser_SetSyncSource,
 799     Parser_GetSyncSource,
 800     Parser_EnumPins,
 801     Parser_FindPin,
 802     Parser_QueryFilterInfo,
 803     Parser_JoinFilterGraph,
 804     Parser_QueryVendorInfo
 805 };
 806
 807 HRESULT MPEGSplitter_create(IUnknown * pUnkOuter, LPVOID * ppv)
 808 {
 809     MPEGSplitterImpl *This;
 810     HRESULT hr = E_FAIL;
 811
 812     TRACE("(%p, %p)\n", pUnkOuter, ppv);
 813
 814     *ppv = NULL;
 815
 816     if (pUnkOuter)
 817         return CLASS_E_NOAGGREGATION;
 818
 819     This = CoTaskMemAlloc(sizeof(MPEGSplitterImpl));
 820     if (!This)
 821         return E_OUTOFMEMORY;
 822
 823     ZeroMemory(This, sizeof(MPEGSplitterImpl));
 824     This->seektable = CoTaskMemAlloc(sizeof(struct seek_entry) * 64);
 825     if (!This->seektable)
 826     {
 827         CoTaskMemFree(This);
 828         return E_OUTOFMEMORY;
 829     }
 830     This->seek_entries = 64;
 831
 832     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);
 833     if (FAILED(hr))
 834     {
 835         CoTaskMemFree(This);
 836         return hr;
 837     }
 838     This->seek = 1;
 839
 840     /* Note: This memory is managed by the parser filter once created */
 841     *ppv = This;
 842
 843     return hr;
 844 }