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C++ EBMLDataSize::val方法代码示例

本文整理汇总了C++中EBMLDataSize::val方法的典型用法代码示例。如果您正苦于以下问题:C++ EBMLDataSize::val方法的具体用法?C++ EBMLDataSize::val怎么用?C++ EBMLDataSize::val使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在EBMLDataSize的用法示例。


在下文中一共展示了EBMLDataSize::val方法的10个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: lookForNextBlock

void MatroskaFileParser::lookForNextBlock() {
#ifdef DEBUG
  fprintf(stderr, "looking for Block\n");
#endif
  // Read and skip over each Matroska header, until we get to a 'Cluster':
  EBMLId id;
  EBMLDataSize size;
  while (fCurrentParseState == LOOKING_FOR_BLOCK) {
    while (!parseEBMLIdAndSize(id, size)) {}
#ifdef DEBUG
    fprintf(stderr, "MatroskaFileParser::lookForNextBlock(): Parsed id 0x%s (%s), size: %lld\n", id.hexString(), id.stringName(), size.val());
#endif
    switch (id.val()) {
      case MATROSKA_ID_SEGMENT: { // 'Segment' header: enter this
	break;
      }
      case MATROSKA_ID_CLUSTER: { // 'Cluster' header: enter this
	break;
      }
      case MATROSKA_ID_TIMECODE: { // 'Timecode' header: get this value
	unsigned timecode;
	if (parseEBMLVal_unsigned(size, timecode)) {
	  fClusterTimecode = timecode;
#ifdef DEBUG
	  fprintf(stderr, "\tCluster timecode: %d (== %f seconds)\n", fClusterTimecode, fClusterTimecode*(fOurFile.fTimecodeScale/1000000000.0));
#endif
	}
	break;
      }
      case MATROSKA_ID_BLOCK_GROUP: { // 'Block Group' header: enter this
	break;
      }
      case MATROSKA_ID_SIMPLEBLOCK:
      case MATROSKA_ID_BLOCK: { // 'SimpleBlock' or 'Block' header: enter this (and we're done)
	fBlockSize = (unsigned)size.val();
	fCurrentParseState = PARSING_BLOCK;
	break;
      }
      case MATROSKA_ID_BLOCK_DURATION: { // 'Block Duration' header: get this value (but we currently don't do anything with it)
	unsigned blockDuration;
	if (parseEBMLVal_unsigned(size, blockDuration)) {
#ifdef DEBUG
	  fprintf(stderr, "\tblock duration: %d (== %f ms)\n", blockDuration, (float)(blockDuration*fOurFile.fTimecodeScale/1000000.0));
#endif
	}
	break;
      }
      default: { // skip over this header
	skipHeader(size);
#ifdef DEBUG
	fprintf(stderr, "\tskipped %lld bytes\n", size.val());
#endif
	break;
      }
    }
    setParseState();
  }
}
开发者ID:agravier,项目名称:naocommons,代码行数:58,代码来源:MatroskaFileParser.cpp

示例2: parseEBMLVal_unsigned

Boolean MatroskaFileParser::parseEBMLVal_unsigned(EBMLDataSize& size, unsigned& result) {
  if (size.val() > 4) return False; // size too large

  u_int64_t result64;
  if (!parseEBMLVal_unsigned64(size, result64)) return False;

  result = (unsigned)result64;

  return True;
}
开发者ID:agravier,项目名称:naocommons,代码行数:10,代码来源:MatroskaFileParser.cpp

示例3: skipHeader

void MatroskaFileParser::skipHeader(EBMLDataSize const& size) {
  unsigned sv = (unsigned)size.val();

  // Hack: To avoid tripping into a parser 'internal error' if we try to skip an excessively large distance.
  // (Such large distances are likely caused by erroneous data.  We might not be able to recover from this, but at least we won't
  //  generate a parser 'internal error'.)
  if (sv > bankSize()-12) sv = bankSize()-12;
  
  skipBytes(sv);
  fCurOffsetInFile += sv;
}
开发者ID:agravier,项目名称:naocommons,代码行数:11,代码来源:MatroskaFileParser.cpp

示例4:

Boolean MatroskaFileParser::parseEBMLVal_unsigned64(EBMLDataSize& size, u_int64_t& result) {
  u_int64_t sv = size.val();
  if (sv > 8) return False; // size too large

  result = 0; // initially
  for (unsigned i = (unsigned)sv; i > 0; --i) {
    if (fLimitOffsetInFile > 0 && fCurOffsetInFile > fLimitOffsetInFile) return False; // We've hit our pre-set limit

    u_int8_t c = get1Byte();
    ++fCurOffsetInFile;

    result = result*256 + c;
  }

  return True;
}
开发者ID:agravier,项目名称:naocommons,代码行数:16,代码来源:MatroskaFileParser.cpp

示例5: parseEBMLVal_float

Boolean MatroskaFileParser::parseEBMLVal_float(EBMLDataSize& size, float& result) {
  switch (size.val()) {
    case 4: {
      unsigned resultAsUnsigned;

      if (!parseEBMLVal_unsigned(size, resultAsUnsigned)) return False;
      result = *(float*)&resultAsUnsigned;
      return True;
    }
    case 8: {
      u_int64_t resultAsU64;

      if (!parseEBMLVal_unsigned64(size, resultAsU64)) return False;
      result = (float)*(double*)&resultAsU64;
      return True;
    }
    default: {
      return False;
    }
  }
}
开发者ID:JavanWang,项目名称:playstream,代码行数:21,代码来源:MatroskaFileParser.cpp

示例6: parseEBMLVal_binary

Boolean MatroskaFileParser::parseEBMLVal_binary(EBMLDataSize& size, u_int8_t*& result) {
  unsigned resultLength = (unsigned)size.val();
  result = new u_int8_t[resultLength];
  if (result == NULL) return False;

  u_int8_t* p = result;
  unsigned i;
  for (i = 0; i < resultLength; ++i) {
    if (fLimitOffsetInFile > 0 && fCurOffsetInFile > fLimitOffsetInFile) break; // We've hit our pre-set limit

    u_int8_t c = get1Byte();
    ++fCurOffsetInFile;

    *p++ = c;
  }
  if (i < resultLength) { // an error occurred
    delete[] result;
    result = NULL;
    return False;
  }

  return True;
}
开发者ID:agravier,项目名称:naocommons,代码行数:23,代码来源:MatroskaFileParser.cpp

示例7: parseEBMLVal_string

Boolean MatroskaFileParser::parseEBMLVal_string(EBMLDataSize& size, char*& result) {
  unsigned resultLength = (unsigned)size.val();
  result = new char[resultLength + 1]; // allow for the trailing '\0'
  if (result == NULL) return False;

  char* p = result;
  unsigned i;
  for (i = 0; i < resultLength; ++i) {
    if (fLimitOffsetInFile > 0 && fCurOffsetInFile > fLimitOffsetInFile) break; // We've hit our pre-set limit

    u_int8_t c = get1Byte();
    ++fCurOffsetInFile;

    *p++ = c;
  }
  if (i < resultLength) { // an error occurred
    delete[] result;
    result = NULL;
    return False;
  }
  *p = '\0';

  return True;
}
开发者ID:agravier,项目名称:naocommons,代码行数:24,代码来源:MatroskaFileParser.cpp

示例8: parseCues

Boolean MatroskaFileParser::parseCues() {
#if defined(DEBUG) || defined(DEBUG_CUES)
  fprintf(stderr, "parsing Cues\n");
#endif
  EBMLId id;
  EBMLDataSize size;

  // Read the next header, which should be MATROSKA_ID_CUES:
  if (!parseEBMLIdAndSize(id, size) || id != MATROSKA_ID_CUES) return True; // The header wasn't what we expected, so we're done
  fLimitOffsetInFile = fCurOffsetInFile + size.val(); // Make sure we don't read past the end of this header

  double currentCueTime = 0.0;
  u_int64_t currentClusterOffsetInFile = 0;

  while (fCurOffsetInFile < fLimitOffsetInFile) {
    while (!parseEBMLIdAndSize(id, size)) {}
#ifdef DEBUG_CUES
    if (id == MATROSKA_ID_CUE_POINT) fprintf(stderr, "\n"); // makes debugging output easier to read
    fprintf(stderr, "MatroskaFileParser::parseCues(): Parsed id 0x%s (%s), size: %lld\n", id.hexString(), id.stringName(), size.val());
#endif
    switch (id.val()) {
      case MATROSKA_ID_CUE_POINT: { // 'Cue Point' header: enter this
	break;
      }
      case MATROSKA_ID_CUE_TIME: { // 'Cue Time' header: get this value
	unsigned cueTime;
	if (parseEBMLVal_unsigned(size, cueTime)) {
	  currentCueTime = cueTime*(fOurFile.fTimecodeScale/1000000000.0);
#ifdef DEBUG_CUES
	  fprintf(stderr, "\tCue Time %d (== %f seconds)\n", cueTime, currentCueTime);
#endif
	}
	break;
      }
      case MATROSKA_ID_CUE_TRACK_POSITIONS: { // 'Cue Track Positions' header: enter this
	break;
      }
      case MATROSKA_ID_CUE_TRACK: { // 'Cue Track' header: get this value (but only for debugging; we don't do anything with it)
	unsigned cueTrack;
	if (parseEBMLVal_unsigned(size, cueTrack)) {
#ifdef DEBUG_CUES
	  fprintf(stderr, "\tCue Track %d\n", cueTrack);
#endif
	}
	break;
      }
      case MATROSKA_ID_CUE_CLUSTER_POSITION: { // 'Cue Cluster Position' header: get this value
	u_int64_t cueClusterPosition;
	if (parseEBMLVal_unsigned64(size, cueClusterPosition)) {
	  currentClusterOffsetInFile = fOurFile.fSegmentDataOffset + cueClusterPosition;
#ifdef DEBUG_CUES
	  fprintf(stderr, "\tCue Cluster Position %llu (=> offset within the file: %llu (0x%llx))\n", cueClusterPosition, currentClusterOffsetInFile, currentClusterOffsetInFile);
#endif
	  // Record this cue point:
	  fOurFile.addCuePoint(currentCueTime, currentClusterOffsetInFile, 1/*default block number within cluster*/);
	}
	break;
      }
      case MATROSKA_ID_CUE_BLOCK_NUMBER: { // 'Cue Block Number' header: get this value
	unsigned cueBlockNumber;
	if (parseEBMLVal_unsigned(size, cueBlockNumber) && cueBlockNumber != 0) {
#ifdef DEBUG_CUES
	  fprintf(stderr, "\tCue Block Number %d\n", cueBlockNumber);
#endif
	  // Record this cue point (overwriting any existing entry for this cue time):
	  fOurFile.addCuePoint(currentCueTime, currentClusterOffsetInFile, cueBlockNumber);
	}
	break;
      }
      default: { // We don't process this header, so just skip over it:
	skipHeader(size);
#ifdef DEBUG_CUES
	fprintf(stderr, "\tskipped %lld bytes\n", size.val());
#endif
	break;
      }
    }
    setParseState();
  }

  fLimitOffsetInFile = 0; // reset
#if defined(DEBUG) || defined(DEBUG_CUES)
  fprintf(stderr, "done parsing Cues\n");
#endif
#ifdef DEBUG_CUES
  fprintf(stderr, "Cue Point tree: ");
  fOurFile.printCuePoints(stderr);
  fprintf(stderr, "\n");
#endif
  return True; // we're done parsing Cues
}
开发者ID:agravier,项目名称:naocommons,代码行数:91,代码来源:MatroskaFileParser.cpp

示例9: parseTrack

Boolean MatroskaFileParser::parseTrack() {
#ifdef DEBUG
  fprintf(stderr, "parsing Track\n");
#endif
  // Read and process each Matroska header, until we get to the end of the Track:
  MatroskaTrack* track = NULL;
  EBMLId id;
  EBMLDataSize size;
  while (fCurOffsetInFile < fLimitOffsetInFile) {
    while (!parseEBMLIdAndSize(id, size)) {}
#ifdef DEBUG
    if (id == MATROSKA_ID_TRACK_ENTRY) fprintf(stderr, "\n"); // makes debugging output easier to read
    fprintf(stderr, "MatroskaFileParser::parseTrack(): Parsed id 0x%s (%s), size: %lld\n", id.hexString(), id.stringName(), size.val());
#endif
    switch (id.val()) {
      case MATROSKA_ID_TRACK_ENTRY: { // 'Track Entry' header: enter this
	// Create a new "MatroskaTrack" object for this entry:
	if (track != NULL && track->trackNumber == 0) delete track; // We had a previous "MatroskaTrack" object that was never used
	track = new MatroskaTrack;
	break;
      }
      case MATROSKA_ID_TRACK_NUMBER: {
	unsigned trackNumber;
	if (parseEBMLVal_unsigned(size, trackNumber)) {
#ifdef DEBUG
	  fprintf(stderr, "\tTrack Number %d\n", trackNumber);
#endif
	  if (track != NULL && trackNumber != 0) {
	    track->trackNumber = trackNumber;
	    fOurFile.fTracks.add(track, trackNumber);
	  }
	}
	break;
      }
      case MATROSKA_ID_TRACK_TYPE: {
	unsigned trackType;
	if (parseEBMLVal_unsigned(size, trackType) && track != NULL) {
	  // We convert the Matroska 'track type' code into our own code (which we can use as a bitmap):
	  track->trackType
	    = trackType == 1 ? MATROSKA_TRACK_TYPE_VIDEO : trackType == 2 ? MATROSKA_TRACK_TYPE_AUDIO
	    : trackType == 0x11 ? MATROSKA_TRACK_TYPE_SUBTITLE : MATROSKA_TRACK_TYPE_OTHER;
#ifdef DEBUG
	  fprintf(stderr, "\tTrack Type 0x%02x (%s)\n", trackType,
		  track->trackType == MATROSKA_TRACK_TYPE_VIDEO ? "video" :
		  track->trackType == MATROSKA_TRACK_TYPE_AUDIO ? "audio" :
		  track->trackType == MATROSKA_TRACK_TYPE_SUBTITLE ? "subtitle" :
		  "<other>");
#endif
	}
	break;
      }
      case MATROSKA_ID_FLAG_ENABLED: {
	unsigned flagEnabled;
	if (parseEBMLVal_unsigned(size, flagEnabled)) {
#ifdef DEBUG
	  fprintf(stderr, "\tTrack is Enabled: %d\n", flagEnabled);
#endif
	  if (track != NULL) track->isEnabled = flagEnabled != 0;
	}
	break;
      }
      case MATROSKA_ID_FLAG_DEFAULT: {
	unsigned flagDefault;
	if (parseEBMLVal_unsigned(size, flagDefault)) {
#ifdef DEBUG
	  fprintf(stderr, "\tTrack is Default: %d\n", flagDefault);
#endif
	  if (track != NULL) track->isDefault = flagDefault != 0;
	}
	break;
      }
      case MATROSKA_ID_FLAG_FORCED: {
	unsigned flagForced;
	if (parseEBMLVal_unsigned(size, flagForced)) {
#ifdef DEBUG
	  fprintf(stderr, "\tTrack is Forced: %d\n", flagForced);
#endif
	  if (track != NULL) track->isForced = flagForced != 0;
	}
	break;
      }
      case MATROSKA_ID_DEFAULT_DURATION: {
	unsigned defaultDuration;
	if (parseEBMLVal_unsigned(size, defaultDuration)) {
#ifdef DEBUG
	  fprintf(stderr, "\tDefault duration %f ms\n", defaultDuration/1000000.0);
#endif
	  if (track != NULL) track->defaultDuration = defaultDuration;
	}
	break;
      }
      case MATROSKA_ID_MAX_BLOCK_ADDITION_ID: {
	unsigned maxBlockAdditionID;
	if (parseEBMLVal_unsigned(size, maxBlockAdditionID)) {
#ifdef DEBUG
	  fprintf(stderr, "\tMax Block Addition ID: %u\n", maxBlockAdditionID);
#endif
	}
	break;
      }
//.........这里部分代码省略.........
开发者ID:agravier,项目名称:naocommons,代码行数:101,代码来源:MatroskaFileParser.cpp

示例10: lookForNextTrack

void MatroskaFileParser::lookForNextTrack() {
#ifdef DEBUG
  fprintf(stderr, "looking for Track\n");
#endif
  EBMLId id;
  EBMLDataSize size;

  // Read and skip over (or enter) each Matroska header, until we get to a 'Track'.
  while (fCurrentParseState == LOOKING_FOR_TRACKS) {
    while (!parseEBMLIdAndSize(id, size)) {}
#ifdef DEBUG
    fprintf(stderr, "MatroskaFileParser::lookForNextTrack(): Parsed id 0x%s (%s), size: %lld\n", id.hexString(), id.stringName(), size.val());
#endif
    switch (id.val()) {
      case MATROSKA_ID_SEGMENT: { // 'Segment' header: enter this
	// Remember the position, within the file, of the start of Segment data, because Seek Positions are relative to this:
	fOurFile.fSegmentDataOffset = fCurOffsetInFile;
	break;
      }
      case MATROSKA_ID_SEEK_HEAD: { // 'Seek Head' header: enter this
	break;
      }
      case MATROSKA_ID_SEEK: { // 'Seek' header: enter this
	break;
      }
      case MATROSKA_ID_SEEK_ID: { // 'Seek ID' header: get this value
	if (parseEBMLNumber(fLastSeekId)) {
#ifdef DEBUG
	  fprintf(stderr, "\tSeek ID 0x%s:\t%s\n", fLastSeekId.hexString(), fLastSeekId.stringName());
#endif
	}
	break;
      }
      case MATROSKA_ID_SEEK_POSITION: { // 'Seek Position' header: get this value
	u_int64_t seekPosition;
	if (parseEBMLVal_unsigned64(size, seekPosition)) {
	  u_int64_t offsetInFile = fOurFile.fSegmentDataOffset + seekPosition;
#ifdef DEBUG
	  fprintf(stderr, "\tSeek Position %llu (=> offset within the file: %llu (0x%llx))\n", seekPosition, offsetInFile, offsetInFile);
#endif
	  // The only 'Seek Position's that we care about are for 'Cluster' and 'Cues':
	  if (fLastSeekId == MATROSKA_ID_CLUSTER) {
	    fOurFile.fClusterOffset = offsetInFile;
	  } else if (fLastSeekId == MATROSKA_ID_CUES) {
	    fOurFile.fCuesOffset = offsetInFile;
	  }
	}
	break;
      }
      case MATROSKA_ID_INFO: { // 'Segment Info' header: enter this
	break;
      }
      case MATROSKA_ID_TIMECODE_SCALE: { // 'Timecode Scale' header: get this value
        unsigned timecodeScale;
	if (parseEBMLVal_unsigned(size, timecodeScale) && timecodeScale > 0) {
	  fOurFile.fTimecodeScale = timecodeScale;
#ifdef DEBUG
	  fprintf(stderr, "\tTimecode Scale %u ns (=> Segment Duration == %f seconds)\n", fOurFile.timecodeScale(), fOurFile.fileDuration());
#endif
	}
	break;
      }
      case MATROSKA_ID_DURATION: { // 'Segment Duration' header: get this value
	if (parseEBMLVal_float(size, fOurFile.fSegmentDuration)) {
#ifdef DEBUG
	  fprintf(stderr, "\tSegment Duration %f (== %f seconds)\n", fOurFile.segmentDuration(), fOurFile.fileDuration());
#endif
	}
	break;
      }
      case MATROSKA_ID_TRACKS: { // enter this, and move on to parsing 'Tracks'
	fLimitOffsetInFile = fCurOffsetInFile + size.val(); // Make sure we don't read past the end of this header
	fCurrentParseState = PARSING_TRACK;
	break;
      }
      default: { // skip over this header
	skipHeader(size);
#ifdef DEBUG
	fprintf(stderr, "\tskipped %lld bytes\n", size.val());
#endif
	break;
      }
    }
    setParseState();
  }
}
开发者ID:agravier,项目名称:naocommons,代码行数:86,代码来源:MatroskaFileParser.cpp


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