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