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