ChunkDescriptor Class Reference

Collaboration diagram for ChunkDescriptor:

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Public Member Functions
	ChunkDescriptor (int64_t offsetInFile, unsigned size, unsigned frameSize, unsigned frameDuration, struct timeval presentationTime)
ChunkDescriptor *	extendChunk (int64_t newOffsetInFile, unsigned newSize, unsigned newFrameSize, unsigned newFrameDuration, struct timeval newPresentationTime)
Data Fields
ChunkDescriptor *	fNextChunk
int64_t	fOffsetInFile
unsigned	fNumFrames
unsigned	fFrameSize
unsigned	fFrameDuration
timeval	fPresentationTime

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Detailed Description

Definition at line 40 of file QuickTimeFileSink.cpp.

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Constructor & Destructor Documentation

ChunkDescriptor::ChunkDescriptor	(	int64_t	offsetInFile,
		unsigned	size,
		unsigned	frameSize,
		unsigned	frameDuration,
		struct timeval	presentationTime
	)

Definition at line 1150 of file QuickTimeFileSink.cpp.

  : fNextChunk(NULL), fOffsetInFile(offsetInFile),
    fNumFrames(size/frameSize),
    fFrameSize(frameSize), fFrameDuration(frameDuration),
    fPresentationTime(presentationTime) {
}

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Member Function Documentation

ChunkDescriptor * ChunkDescriptor::extendChunk	(	int64_t	newOffsetInFile,
		unsigned	newSize,
		unsigned	newFrameSize,
		unsigned	newFrameDuration,
		struct timeval	newPresentationTime
	)

Definition at line 1160 of file QuickTimeFileSink.cpp.

Referenced by SubsessionIOState::useFrame1().

                                                  {
  // First, check whether the new space is just at the end of this
  // existing chunk:
  if (newOffsetInFile == fOffsetInFile + fNumFrames*fFrameSize) {
    // We can extend this existing chunk, provided that the frame size
    // and frame duration have not changed:
    if (newFrameSize == fFrameSize && newFrameDuration == fFrameDuration) {
      fNumFrames += newSize/fFrameSize;
      return this;
    }
  }

  // We'll allocate a new ChunkDescriptor, and link it to the end of us:
  ChunkDescriptor* newDescriptor
    = new ChunkDescriptor(newOffsetInFile, newSize,
                          newFrameSize, newFrameDuration,
                          newPresentationTime);

  fNextChunk = newDescriptor;

  return newDescriptor;
}

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Field Documentation

ChunkDescriptor* ChunkDescriptor::fNextChunk

Definition at line 52 of file QuickTimeFileSink.cpp.

Referenced by QuickTimeFileSink::addAtom_hdlr2(), SubsessionIOState::setFinalQTstate(), while(), and SubsessionIOState::~SubsessionIOState().

int64_t ChunkDescriptor::fOffsetInFile

Definition at line 53 of file QuickTimeFileSink.cpp.

Referenced by QuickTimeFileSink::addAtom_hdlr2().

unsigned ChunkDescriptor::fNumFrames

Definition at line 54 of file QuickTimeFileSink.cpp.

Referenced by QuickTimeFileSink::addAtom_hdlr2(), SubsessionIOState::setFinalQTstate(), and while().

unsigned ChunkDescriptor::fFrameSize

Definition at line 55 of file QuickTimeFileSink.cpp.

Referenced by QuickTimeFileSink::addAtom_hdlr2().

unsigned ChunkDescriptor::fFrameDuration

Definition at line 56 of file QuickTimeFileSink.cpp.

Referenced by QuickTimeFileSink::addAtom_hdlr2(), SubsessionIOState::setFinalQTstate(), and while().

struct timeval ChunkDescriptor::fPresentationTime [read]

Definition at line 57 of file QuickTimeFileSink.cpp.

Referenced by QuickTimeFileSink::completeOutputFile(), and while().

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The documentation for this class was generated from the following file:

• liveMedia/QuickTimeFileSink.cpp

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