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