ADUdescriptor Class Reference

#include <MP3ADUdescriptor.hh>

Static Public Member Functions
static unsigned	computeSize (unsigned remainingFrameSize)
static unsigned	generateDescriptor (unsigned char *&toPtr, unsigned remainingFrameSize)
static void	generateTwoByteDescriptor (unsigned char *&toPtr, unsigned remainingFrameSize)
static unsigned	getRemainingFrameSize (unsigned char *&fromPtr)

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Detailed Description

Definition at line 26 of file MP3ADUdescriptor.hh.

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Member Function Documentation

static unsigned ADUdescriptor::computeSize

(

unsigned

remainingFrameSize

)

[inline, static]

Definition at line 29 of file MP3ADUdescriptor.hh.

Referenced by ADUFromMP3Source::doGetNextFrame1(), and generateDescriptor().

                                                           {
    return remainingFrameSize >= 64 ? 2 : 1;
  }

unsigned ADUdescriptor::generateDescriptor	(	unsigned char *&	toPtr,
		unsigned	remainingFrameSize
	)			[static]

Definition at line 29 of file MP3ADUdescriptor.cpp.

References computeSize(), and generateTwoByteDescriptor().

Referenced by ADUFromMP3Source::doGetNextFrame1(), and SegmentQueue::insertDummyBeforeTail().

                                                                        {
  unsigned descriptorSize = ADUdescriptor::computeSize(remainingFrameSize);
  switch (descriptorSize) {
  case 1: {
    *toPtr++ = (unsigned char)remainingFrameSize;
    break;
  }
  case 2: {
    generateTwoByteDescriptor(toPtr, remainingFrameSize);
    break;
  }
  }

  return descriptorSize;
}

void ADUdescriptor::generateTwoByteDescriptor	(	unsigned char *&	toPtr,
		unsigned	remainingFrameSize
	)			[static]

Definition at line 46 of file MP3ADUdescriptor.cpp.

References TWO_BYTE_DESCR_FLAG.

Referenced by generateDescriptor(), and SegmentQueue::insertDummyBeforeTail().

                                                                           {
  *toPtr++ = (TWO_BYTE_DESCR_FLAG|(unsigned char)(remainingFrameSize>>8));
  *toPtr++ = (unsigned char)(remainingFrameSize&0xFF);
}

unsigned ADUdescriptor::getRemainingFrameSize

(

unsigned char *&

fromPtr

)

[static]

Definition at line 52 of file MP3ADUdescriptor.cpp.

References TWO_BYTE_DESCR_FLAG.

Referenced by DeinterleavingFrames::getIncomingFrameParamsAfter(), ADUBufferedPacket::nextEnclosedFrameSize(), InterleavingFrames::setFrameParams(), and SegmentQueue::sqAfterGettingCommon().

                                                                     {
  unsigned char firstByte = *fromPtr++;

  if (firstByte&TWO_BYTE_DESCR_FLAG) {
    // This is a 2-byte descriptor
    unsigned char secondByte = *fromPtr++;

    return ((firstByte&0x3F)<<8) | secondByte;
  } else {
    // This is a 1-byte descriptor
    return (firstByte&0x3F);
  }
}

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

• liveMedia/MP3ADUdescriptor.hh
• liveMedia/MP3ADUdescriptor.cpp

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