InterleavingFrames Class Reference

Collaboration diagram for InterleavingFrames:


Public Member Functions
	InterleavingFrames (unsigned maxCycleSize)
virtual	~InterleavingFrames ()
Boolean	haveReleaseableFrame ()
void	getIncomingFrameParams (unsigned char index, unsigned char *&dataPtr, unsigned &bytesAvailable)
void	getReleasingFrameParams (unsigned char index, unsigned char *&dataPtr, unsigned &bytesInUse, struct timeval &presentationTime, unsigned &durationInMicroseconds)
void	setFrameParams (unsigned char index, unsigned char icc, unsigned char ii, unsigned frameSize, struct timeval presentationTime, unsigned durationInMicroseconds)
unsigned	nextIndexToRelease ()
void	releaseNext ()
Private Attributes
unsigned	fMaxCycleSize
unsigned	fNextIndexToRelease
InterleavingFrameDescriptor *	fDescriptors

Detailed Description

Definition at line 83 of file MP3ADUinterleaving.cpp.

Constructor & Destructor Documentation

InterleavingFrames::InterleavingFrames ( unsigned maxCycleSize )

Definition at line 333 of file MP3ADUinterleaving.cpp.

00334   : fMaxCycleSize(maxCycleSize), fNextIndexToRelease(0),
00335     fDescriptors(new InterleavingFrameDescriptor[maxCycleSize]) {
00336 }

InterleavingFrames::~InterleavingFrames ( ) [virtual]

Definition at line 337 of file MP3ADUinterleaving.cpp.

References fDescriptors.

00337                                         {
00338   delete[] fDescriptors;
00339 }

Member Function Documentation

Boolean InterleavingFrames::haveReleaseableFrame ( )

Definition at line 341 of file MP3ADUinterleaving.cpp.

References fDescriptors, fNextIndexToRelease, and InterleavingFrameDescriptor::frameDataSize.

Referenced by MP3ADUinterleaver::doGetNextFrame().

00341                                                  {
00342   return fDescriptors[fNextIndexToRelease].frameDataSize > 0;
00343 }

void InterleavingFrames::getIncomingFrameParams	(	unsigned char	index,
		unsigned char *&	dataPtr,
		unsigned &	bytesAvailable
	)

Definition at line 345 of file MP3ADUinterleaving.cpp.

References fDescriptors, InterleavingFrameDescriptor::frameData, and MAX_FRAME_SIZE.

Referenced by MP3ADUinterleaver::doGetNextFrame().

00347                                                                           {
00348   InterleavingFrameDescriptor& desc = fDescriptors[index];
00349   dataPtr = &desc.frameData[0];
00350   bytesAvailable = MAX_FRAME_SIZE;
00351 }

void InterleavingFrames::getReleasingFrameParams	(	unsigned char	index,
		unsigned char *&	dataPtr,
		unsigned &	bytesInUse,
		struct timeval &	presentationTime,
		unsigned &	durationInMicroseconds
	)

Definition at line 353 of file MP3ADUinterleaving.cpp.

References InterleavingFrameDescriptor::durationInMicroseconds, fDescriptors, InterleavingFrameDescriptor::frameData, InterleavingFrameDescriptor::frameDataSize, and InterleavingFrameDescriptor::presentationTime.

Referenced by MP3ADUinterleaver::releaseOutgoingFrame().

00357                                                                                    {
00358   InterleavingFrameDescriptor& desc = fDescriptors[index];
00359   dataPtr = &desc.frameData[0];
00360   bytesInUse = desc.frameDataSize;
00361   presentationTime = desc.presentationTime;
00362   durationInMicroseconds = desc.durationInMicroseconds;
00363 }

void InterleavingFrames::setFrameParams	(	unsigned char	index,
		unsigned char	icc,
		unsigned char	ii,
		unsigned	frameSize,
		struct timeval	presentationTime,
		unsigned	durationInMicroseconds
	)

Definition at line 365 of file MP3ADUinterleaving.cpp.

Referenced by MP3ADUinterleaver::afterGettingFrame().

00370                                                                          {
00371   InterleavingFrameDescriptor& desc = fDescriptors[index];
00372   desc.frameDataSize = frameSize;
00373   desc.presentationTime = presentationTime;
00374   desc.durationInMicroseconds = durationInMicroseconds;
00375 
00376   // Advance over the ADU descriptor, to get to the MPEG 'syncword':
00377   unsigned char* ptr = &desc.frameData[0];
00378   (void)ADUdescriptor::getRemainingFrameSize(ptr);
00379 
00380   // Replace the next 11 bits with (ii,icc):
00381   *ptr++ = ii;
00382   *ptr &=~ 0xE0;
00383   *ptr |= (icc<<5);
00384 }

unsigned InterleavingFrames::nextIndexToRelease ( ) [inline]

Definition at line 101 of file MP3ADUinterleaving.cpp.

Referenced by MP3ADUinterleaver::releaseOutgoingFrame().

00101 {return fNextIndexToRelease;}

void InterleavingFrames::releaseNext ( )

Definition at line 386 of file MP3ADUinterleaving.cpp.

References fDescriptors, fMaxCycleSize, fNextIndexToRelease, and InterleavingFrameDescriptor::frameDataSize.

Referenced by MP3ADUinterleaver::releaseOutgoingFrame().

00386                                      {
00387   fDescriptors[fNextIndexToRelease].frameDataSize = 0;
00388   fNextIndexToRelease = (fNextIndexToRelease+1)%fMaxCycleSize;
00389 }