MPEG4VideoStreamDiscreteFramer Class Reference

#include <MPEG4VideoStreamDiscreteFramer.hh>

Inheritance diagram for MPEG4VideoStreamDiscreteFramer:

[legend]Collaboration diagram for MPEG4VideoStreamDiscreteFramer:


Public Types
typedef void(	afterGettingFunc )(void *clientData, unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime, unsigned durationInMicroseconds)
typedef void(	onCloseFunc )(void *clientData)
Public Member Functions
u_int8_t	profile_and_level_indication () const
unsigned char *	getConfigBytes (unsigned &numBytes) const
Boolean &	pictureEndMarker ()
void	flushInput ()
FramedSource *	inputSource () const
void	getNextFrame (unsigned char to, unsigned maxSize, afterGettingFunc afterGettingFunc, void afterGettingClientData, onCloseFunc onCloseFunc, void *onCloseClientData)
void	stopGettingFrames ()
virtual unsigned	maxFrameSize () const
Boolean	isCurrentlyAwaitingData () const
virtual Boolean	isRTPSource () const
virtual Boolean	isMPEG1or2VideoStreamFramer () const
virtual Boolean	isH264VideoStreamFramer () const
virtual Boolean	isJPEGVideoSource () const
virtual Boolean	isAMRAudioSource () const
UsageEnvironment &	envir () const
char const *	name () const
virtual Boolean	isSink () const
virtual Boolean	isRTCPInstance () const
virtual Boolean	isRTSPClient () const
virtual Boolean	isRTSPServer () const
virtual Boolean	isMediaSession () const
virtual Boolean	isServerMediaSession () const
virtual Boolean	isDarwinInjector () const
Static Public Member Functions
static MPEG4VideoStreamDiscreteFramer *	createNew (UsageEnvironment &env, FramedSource *inputSource)
static Boolean	lookupByName (UsageEnvironment &env, char const sourceName, FramedSource &resultSource)
static Boolean	lookupByName (UsageEnvironment &env, char const sourceName, MediaSource &resultSource)
static Boolean	lookupByName (UsageEnvironment &env, char const mediumName, Medium &resultMedium)
static void	handleClosure (void *clientData)
static void	close (UsageEnvironment &env, char const *mediumName)
static void	close (Medium *medium)
Protected Member Functions
	MPEG4VideoStreamDiscreteFramer (UsageEnvironment &env, FramedSource *inputSource)
virtual	~MPEG4VideoStreamDiscreteFramer ()
virtual void	doGetNextFrame ()
void	afterGettingFrame1 (unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime, unsigned durationInMicroseconds)
Boolean	getNextFrameBit (u_int8_t &result)
Boolean	getNextFrameBits (unsigned numBits, u_int32_t &result)
void	analyzeVOLHeader ()
void	startNewConfig ()
void	appendToNewConfig (unsigned char *newConfigBytes, unsigned numNewBytes)
void	completeNewConfig ()
void	computePresentationTime (unsigned numAdditionalPictures)
void	setTimeCode (unsigned hours, unsigned minutes, unsigned seconds, unsigned pictures, unsigned picturesSinceLastGOP)
virtual char const *	MIMEtype () const
virtual void	getAttributes () const
virtual void	doStopGettingFrames ()
TaskToken &	nextTask ()
Static Protected Member Functions
static void	afterGettingFrame (void *clientData, unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime, unsigned durationInMicroseconds)
static void	afterGetting (FramedSource *source)
Protected Attributes
u_int32_t	vop_time_increment_resolution
unsigned	fNumVTIRBits
timeval	fLastNonBFramePresentationTime
unsigned	fLastNonBFrameVop_time_increment
u_int8_t	fProfileAndLevelIndication
unsigned char *	fConfigBytes
unsigned	fNumConfigBytes
double	fFrameRate
unsigned	fPictureCount
Boolean	fPictureEndMarker
MPEGVideoStreamParser *	fParser
FramedSource *	fInputSource
unsigned char *	fTo
unsigned	fMaxSize
unsigned	fFrameSize
unsigned	fNumTruncatedBytes
timeval	fPresentationTime
unsigned	fDurationInMicroseconds
Private Attributes
unsigned	fNumBitsSeenSoFar
Friends
class	MPEGVideoStreamParser

Detailed Description

Definition at line 31 of file MPEG4VideoStreamDiscreteFramer.hh.

Member Typedef Documentation

typedef void( FramedSource::afterGettingFunc)(void *clientData, unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime, unsigned durationInMicroseconds) [inherited]

Definition at line 36 of file FramedSource.hh.

typedef void( FramedSource::onCloseFunc)(void *clientData) [inherited]

Definition at line 40 of file FramedSource.hh.

Constructor & Destructor Documentation

MPEG4VideoStreamDiscreteFramer::MPEG4VideoStreamDiscreteFramer	(	UsageEnvironment &	env,
		FramedSource *	inputSource
	)			`[protected]`

Definition at line 34 of file MPEG4VideoStreamDiscreteFramer.cpp.

References fLastNonBFramePresentationTime.

Referenced by createNew().

00036   : MPEG4VideoStreamFramer(env, inputSource, False/*don't create a parser*/),
00037     vop_time_increment_resolution(0), fNumVTIRBits(0),
00038     fLastNonBFrameVop_time_increment(0) {
00039   fLastNonBFramePresentationTime.tv_sec = 0;
00040   fLastNonBFramePresentationTime.tv_usec = 0;
00041 }

MPEG4VideoStreamDiscreteFramer::~MPEG4VideoStreamDiscreteFramer ( ) [protected, virtual]

Definition at line 43 of file MPEG4VideoStreamDiscreteFramer.cpp.

00043                                                                 {
00044 }

Member Function Documentation

MPEG4VideoStreamDiscreteFramer * MPEG4VideoStreamDiscreteFramer::createNew	(	UsageEnvironment &	env,
		FramedSource *	inputSource
	)			`[static]`

Reimplemented from MPEG4VideoStreamFramer.

Definition at line 27 of file MPEG4VideoStreamDiscreteFramer.cpp.

References env, FramedFilter::inputSource(), and MPEG4VideoStreamDiscreteFramer().

00028                                                              {
00029   // Need to add source type checking here???  #####
00030   return new MPEG4VideoStreamDiscreteFramer(env, inputSource);
00031 }

void MPEG4VideoStreamDiscreteFramer::doGetNextFrame ( ) [protected, virtual]

Reimplemented from MPEGVideoStreamFramer.

Definition at line 46 of file MPEG4VideoStreamDiscreteFramer.cpp.

References afterGettingFrame(), FramedFilter::fInputSource, FramedSource::fMaxSize, FramedSource::fTo, FramedSource::getNextFrame(), and FramedSource::handleClosure().

00046                                                     {
00047   // Arrange to read data (which should be a complete MPEG-4 video frame)
00048   // from our data source, directly into the client's input buffer.
00049   // After reading this, we'll do some parsing on the frame.
00050   fInputSource->getNextFrame(fTo, fMaxSize,
00051                              afterGettingFrame, this,
00052                              FramedSource::handleClosure, this);
00053 }

void MPEG4VideoStreamDiscreteFramer::afterGettingFrame	(	void *	clientData,
		unsigned	frameSize,
		unsigned	numTruncatedBytes,
		struct timeval	presentationTime,
		unsigned	durationInMicroseconds
	)			`[static, protected]`

Definition at line 56 of file MPEG4VideoStreamDiscreteFramer.cpp.

References afterGettingFrame1().

Referenced by doGetNextFrame().

00059                                                      {
00060   MPEG4VideoStreamDiscreteFramer* source = (MPEG4VideoStreamDiscreteFramer*)clientData;
00061   source->afterGettingFrame1(frameSize, numTruncatedBytes,
00062                              presentationTime, durationInMicroseconds);
00063 }

void MPEG4VideoStreamDiscreteFramer::afterGettingFrame1	(	unsigned	frameSize,
		unsigned	numTruncatedBytes,
		struct timeval	presentationTime,
		unsigned	durationInMicroseconds
	)			`[protected]`

Definition at line 66 of file MPEG4VideoStreamDiscreteFramer.cpp.

References analyzeVOLHeader(), MPEG4VideoStreamFramer::fConfigBytes, fLastNonBFramePresentationTime, fLastNonBFrameVop_time_increment, MPEG4VideoStreamFramer::fNumConfigBytes, fNumVTIRBits, MPEGVideoStreamFramer::fPictureEndMarker, MPEG4VideoStreamFramer::fProfileAndLevelIndication, FramedSource::fTo, if(), MILLION, True, and vop_time_increment_resolution.

Referenced by afterGettingFrame().

00068                                                       {
00069   // Check that the first 4 bytes are a system code:
00070   if (frameSize >= 4 && fTo[0] == 0 && fTo[1] == 0 && fTo[2] == 1) {
00071     fPictureEndMarker = True; // Assume that we have a complete 'picture' here
00072     unsigned i = 3;
00073     if (fTo[i] == 0xB0) { // VISUAL_OBJECT_SEQUENCE_START_CODE
00074       // The next byte is the "profile_and_level_indication":
00075       if (frameSize >= 5) fProfileAndLevelIndication = fTo[4];
00076 
00077       // The start of this frame - up to the first GROUP_VOP_START_CODE
00078       // or VOP_START_CODE - is stream configuration information.  Save this:
00079       for (i = 7; i < frameSize; ++i) {
00080         if ((fTo[i] == 0xB3 /*GROUP_VOP_START_CODE*/ ||
00081              fTo[i] == 0xB6 /*VOP_START_CODE*/)
00082             && fTo[i-1] == 1 && fTo[i-2] == 0 && fTo[i-3] == 0) {
00083           break; // The configuration information ends here
00084         }
00085       }
00086       fNumConfigBytes = i < frameSize ? i-3 : frameSize;
00087       delete[] fConfigBytes; fConfigBytes = new unsigned char[fNumConfigBytes];
00088       for (unsigned j = 0; j < fNumConfigBytes; ++j) fConfigBytes[j] = fTo[j];
00089 
00090       // This information (should) also contain a VOL header, which we need
00091       // to analyze, to get "vop_time_increment_resolution" (which we need
00092       // - along with "vop_time_increment" - in order to generate accurate
00093       // presentation times for "B" frames).
00094       analyzeVOLHeader();
00095     }
00096 
00097     if (i < frameSize) {
00098       u_int8_t nextCode = fTo[i];
00099 
00100       if (nextCode == 0xB3 /*GROUP_VOP_START_CODE*/) {
00101         // Skip to the following VOP_START_CODE (if any):
00102         for (i += 4; i < frameSize; ++i) {
00103           if (fTo[i] == 0xB6 /*VOP_START_CODE*/
00104               && fTo[i-1] == 1 && fTo[i-2] == 0 && fTo[i-3] == 0) {
00105             nextCode = fTo[i];
00106             break;
00107           }
00108         }
00109       }
00110 
00111       if (nextCode == 0xB6 /*VOP_START_CODE*/ && i+5 < frameSize) {
00112         ++i;
00113 
00114         // Get the "vop_coding_type" from the next byte:
00115         u_int8_t nextByte = fTo[i++];
00116         u_int8_t vop_coding_type = nextByte>>6;
00117 
00118         // Next, get the "modulo_time_base" by counting the '1' bits that
00119         // follow.  We look at the next 32-bits only.
00120         // This should be enough in most cases.
00121         u_int32_t next4Bytes
00122           = (fTo[i]<<24)|(fTo[i+1]<<16)|(fTo[i+2]<<8)|fTo[i+3];
00123         i += 4;
00124         u_int32_t timeInfo = (nextByte<<(32-6))|(next4Bytes>>6);
00125         unsigned modulo_time_base = 0;
00126         u_int32_t mask = 0x80000000;
00127         while ((timeInfo&mask) != 0) {
00128           ++modulo_time_base;
00129           mask >>= 1;
00130         }
00131         mask >>= 2;
00132 
00133         // Then, get the "vop_time_increment".
00134         unsigned vop_time_increment = 0;
00135         // First, make sure we have enough bits left for this:
00136         if ((mask>>(fNumVTIRBits-1)) != 0) {
00137           for (unsigned i = 0; i < fNumVTIRBits; ++i) {
00138             vop_time_increment |= timeInfo&mask;
00139             mask >>= 1;
00140           }
00141           while (mask != 0) {
00142             vop_time_increment >>= 1;
00143             mask >>= 1;
00144           }
00145         }
00146 
00147         // If this is a "B" frame, then we have to tweak "presentationTime":
00148         if (vop_coding_type == 2/*B*/
00149             && (fLastNonBFramePresentationTime.tv_usec > 0 ||
00150                 fLastNonBFramePresentationTime.tv_sec > 0)) {
00151           int timeIncrement
00152             = fLastNonBFrameVop_time_increment - vop_time_increment;
00153           if (timeIncrement<0) timeIncrement += vop_time_increment_resolution;
00154           unsigned const MILLION = 1000000;
00155           double usIncrement = vop_time_increment_resolution == 0 ? 0.0
00156             : ((double)timeIncrement*MILLION)/vop_time_increment_resolution;
00157           unsigned secondsToSubtract = (unsigned)(usIncrement/MILLION);
00158           unsigned uSecondsToSubtract = ((unsigned)usIncrement)%MILLION;
00159 
00160           presentationTime = fLastNonBFramePresentationTime;
00161           if ((unsigned)presentationTime.tv_usec < uSecondsToSubtract) {
00162             presentationTime.tv_usec += MILLION;
00163             if (presentationTime.tv_sec > 0) --presentationTime.tv_sec;
00164           }
00165           presentationTime.tv_usec -= uSecondsToSubtract;
00166           if ((unsigned)presentationTime.tv_sec > secondsToSubtract) {
00167             presentationTime.tv_sec -= secondsToSubtract;
00168           } else {
00169             presentationTime.tv_sec = presentationTime.tv_usec = 0;
00170           }
00171         } else {
00172           fLastNonBFramePresentationTime = presentationTime;
00173           fLastNonBFrameVop_time_increment = vop_time_increment;
00174         }
00175       }
00176     }
00177   }
00178 
00179   // Complete delivery to the client:
00180   fFrameSize = frameSize;
00181   fNumTruncatedBytes = numTruncatedBytes;
00182   fPresentationTime = presentationTime;
00183   fDurationInMicroseconds = durationInMicroseconds;
00184   afterGetting(this);
00185 }

Boolean MPEG4VideoStreamDiscreteFramer::getNextFrameBit ( u_int8_t & result ) [protected]

Definition at line 187 of file MPEG4VideoStreamDiscreteFramer.cpp.

References False, MPEG4VideoStreamFramer::fConfigBytes, fNumBitsSeenSoFar, MPEG4VideoStreamFramer::fNumConfigBytes, and True.

Referenced by analyzeVOLHeader(), and getNextFrameBits().

00187                                                                         {
00188   if (fNumBitsSeenSoFar/8 >= fNumConfigBytes) return False;
00189 
00190   u_int8_t nextByte = fConfigBytes[fNumBitsSeenSoFar/8];
00191   result = (nextByte>>(7-fNumBitsSeenSoFar%8))&1;
00192   ++fNumBitsSeenSoFar;
00193   return True;
00194 }

Boolean MPEG4VideoStreamDiscreteFramer::getNextFrameBits	(	unsigned	numBits,
		u_int32_t &	result
	)			`[protected]`

Definition at line 196 of file MPEG4VideoStreamDiscreteFramer.cpp.

References False, getNextFrameBit(), and True.

Referenced by analyzeVOLHeader().

00197                                                                             {
00198   result = 0;
00199   for (unsigned i = 0; i < numBits; ++i) {
00200     u_int8_t nextBit;
00201     if (!getNextFrameBit(nextBit)) return False;
00202     result = (result<<1)|nextBit;
00203   }
00204   return True;
00205 }

void MPEG4VideoStreamDiscreteFramer::analyzeVOLHeader ( ) [protected]

Definition at line 207 of file MPEG4VideoStreamDiscreteFramer.cpp.

References MPEG4VideoStreamFramer::fConfigBytes, fNumBitsSeenSoFar, MPEG4VideoStreamFramer::fNumConfigBytes, fNumVTIRBits, getNextFrameBit(), getNextFrameBits(), and vop_time_increment_resolution.

Referenced by afterGettingFrame1().

00207                                                       {
00208   // Begin by moving to the VOL header:
00209   unsigned i;
00210   for (i = 3; i < fNumConfigBytes; ++i) {
00211     if (fConfigBytes[i] >= 0x20 && fConfigBytes[i] <= 0x2F
00212         && fConfigBytes[i-1] == 1
00213         && fConfigBytes[i-2] == 0 && fConfigBytes[i-3] == 0) {
00214       ++i;
00215       break;
00216     }
00217   }
00218 
00219   fNumBitsSeenSoFar = 8*i + 9;
00220   do {
00221     u_int8_t is_object_layer_identifier;
00222     if (!getNextFrameBit(is_object_layer_identifier)) break;
00223     if (is_object_layer_identifier) fNumBitsSeenSoFar += 7;
00224 
00225     u_int32_t aspect_ratio_info;
00226     if (!getNextFrameBits(4, aspect_ratio_info)) break;
00227     if (aspect_ratio_info == 15 /*extended_PAR*/) fNumBitsSeenSoFar += 16;
00228 
00229     u_int8_t vol_control_parameters;
00230     if (!getNextFrameBit(vol_control_parameters)) break;
00231     if (vol_control_parameters) {
00232       fNumBitsSeenSoFar += 3; // chroma_format; low_delay
00233       u_int8_t vbw_parameters;
00234       if (!getNextFrameBit(vbw_parameters)) break;
00235       if (vbw_parameters) fNumBitsSeenSoFar += 79;
00236     }
00237 
00238     fNumBitsSeenSoFar += 2; // video_object_layer_shape
00239     u_int8_t marker_bit;
00240     if (!getNextFrameBit(marker_bit)) break;
00241     if (marker_bit != 1) break; // sanity check
00242 
00243     if (!getNextFrameBits(16, vop_time_increment_resolution)) break;
00244     if (vop_time_increment_resolution == 0) break; // shouldn't happen
00245 
00246     // Compute how many bits are necessary to represent this:
00247     fNumVTIRBits = 0;
00248     for (unsigned test = vop_time_increment_resolution; test>0; test /= 2) {
00249       ++fNumVTIRBits;
00250     }
00251   } while (0);
00252 }

u_int8_t MPEG4VideoStreamFramer::profile_and_level_indication ( ) const [inline, inherited]

Definition at line 38 of file MPEG4VideoStreamFramer.hh.

References MPEG4VideoStreamFramer::fProfileAndLevelIndication.

Referenced by MPEG4ESVideoRTPSink::auxSDPLine().

00038                                                 {
00039     return fProfileAndLevelIndication;
00040   }

unsigned char * MPEG4VideoStreamFramer::getConfigBytes ( unsigned & numBytes ) const [inherited]

Definition at line 97 of file MPEG4VideoStreamFramer.cpp.

References MPEG4VideoStreamFramer::fConfigBytes, and MPEG4VideoStreamFramer::fNumConfigBytes.

Referenced by MPEG4ESVideoRTPSink::auxSDPLine().

00097                                          {
00098   numBytes = fNumConfigBytes;
00099   return fConfigBytes;
00100 }

void MPEG4VideoStreamFramer::startNewConfig ( ) [protected, inherited]

Definition at line 118 of file MPEG4VideoStreamFramer.cpp.

References MPEG4VideoStreamFramer::fNewConfigBytes, MPEG4VideoStreamFramer::fNumNewConfigBytes, and NULL.

Referenced by MPEG4VideoStreamParser::parseVisualObjectSequence().

00118                                             {
00119   delete[] fNewConfigBytes; fNewConfigBytes = NULL;
00120   fNumNewConfigBytes = 0;
00121 }

void MPEG4VideoStreamFramer::appendToNewConfig	(	unsigned char *	newConfigBytes,
		unsigned	numNewBytes
	)			`[protected, inherited]`

Definition at line 124 of file MPEG4VideoStreamFramer.cpp.

References MPEG4VideoStreamFramer::fNewConfigBytes, and MPEG4VideoStreamFramer::fNumNewConfigBytes.

Referenced by MPEG4VideoStreamParser::parseVideoObjectLayer(), MPEG4VideoStreamParser::parseVisualObject(), and MPEG4VideoStreamParser::parseVisualObjectSequence().

00124                                                                        {
00125   // Allocate a new block of memory for the new config bytes:
00126   unsigned char* configNew
00127     = new unsigned char[fNumNewConfigBytes + numNewBytes];
00128 
00129   // Copy the old, then the new, config bytes there:
00130   memmove(configNew, fNewConfigBytes, fNumNewConfigBytes);
00131   memmove(&configNew[fNumNewConfigBytes], newConfigBytes, numNewBytes);
00132 
00133   delete[] fNewConfigBytes; fNewConfigBytes = configNew;
00134   fNumNewConfigBytes += numNewBytes;
00135 }

void MPEG4VideoStreamFramer::completeNewConfig ( ) [protected, inherited]

Definition at line 137 of file MPEG4VideoStreamFramer.cpp.

References MPEG4VideoStreamFramer::fConfigBytes, MPEG4VideoStreamFramer::fNewConfigBytes, MPEG4VideoStreamFramer::fNumConfigBytes, MPEG4VideoStreamFramer::fNumNewConfigBytes, and NULL.

Referenced by MPEG4VideoStreamParser::parseVideoObjectLayer().

00137                                                {
00138   delete[] fConfigBytes; fConfigBytes = fNewConfigBytes;
00139   fNewConfigBytes = NULL;
00140   fNumConfigBytes = fNumNewConfigBytes;
00141   fNumNewConfigBytes = 0;
00142 }

Boolean& MPEGVideoStreamFramer::pictureEndMarker ( ) [inline, inherited]

Definition at line 40 of file MPEGVideoStreamFramer.hh.

References MPEGVideoStreamFramer::fPictureEndMarker.

Referenced by MPEG4ESVideoRTPSink::doSpecialFrameHandling(), and MPEG1or2VideoRTPSink::doSpecialFrameHandling().

00040 { return fPictureEndMarker; }

void MPEGVideoStreamFramer::flushInput ( ) [inherited]

Definition at line 53 of file MPEGVideoStreamFramer.cpp.

References StreamParser::flushInput(), MPEGVideoStreamFramer::fParser, NULL, and MPEGVideoStreamFramer::reset().

Referenced by MPEG1or2DemuxedServerMediaSubsession::seekStreamSource().

00053                                        {
00054   reset();
00055   if (fParser != NULL) fParser->flushInput();
00056 }

void MPEGVideoStreamFramer::computePresentationTime ( unsigned numAdditionalPictures ) [protected, inherited]

Definition at line 74 of file MPEGVideoStreamFramer.cpp.

References TimeCode::days, MPEGVideoStreamFramer::fCurGOPTimeCode, MPEGVideoStreamFramer::fFrameRate, MPEGVideoStreamFramer::fPicturesAdjustment, MPEGVideoStreamFramer::fPictureTimeBase, FramedSource::fPresentationTime, MPEGVideoStreamFramer::fPresentationTimeBase, MPEGVideoStreamFramer::fTcSecsBase, TimeCode::hours, TimeCode::minutes, TimeCode::pictures, and TimeCode::seconds.

Referenced by MPEG1or2VideoStreamParser::parseGOPHeader(), MPEG4VideoStreamParser::parseGroupOfVideoObjectPlane(), MPEG1or2VideoStreamParser::parsePictureHeader(), MPEG1or2VideoStreamParser::parseSlice(), MPEG4VideoStreamParser::parseVideoObjectLayer(), MPEG4VideoStreamParser::parseVideoObjectPlane(), MPEG1or2VideoStreamParser::parseVideoSequenceHeader(), MPEG4VideoStreamParser::parseVisualObject(), and MPEG4VideoStreamParser::parseVisualObjectSequence().

00074                                                         {
00075   // Computes "fPresentationTime" from the most recent GOP's
00076   // time_code, along with the "numAdditionalPictures" parameter:
00077   TimeCode& tc = fCurGOPTimeCode;
00078 
00079   unsigned tcSecs
00080     = (((tc.days*24)+tc.hours)*60+tc.minutes)*60+tc.seconds - fTcSecsBase;
00081   double pictureTime = fFrameRate == 0.0 ? 0.0
00082     : (tc.pictures + fPicturesAdjustment + numAdditionalPictures)/fFrameRate;
00083   while (pictureTime < fPictureTimeBase) { // "if" should be enough, but just in case
00084     if (tcSecs > 0) tcSecs -= 1;
00085     pictureTime += 1.0;
00086   }
00087   pictureTime -= fPictureTimeBase;
00088   if (pictureTime < 0.0) pictureTime = 0.0; // sanity check
00089   unsigned pictureSeconds = (unsigned)pictureTime;
00090   double pictureFractionOfSecond = pictureTime - (double)pictureSeconds;
00091 
00092   fPresentationTime = fPresentationTimeBase;
00093   fPresentationTime.tv_sec += tcSecs + pictureSeconds;
00094   fPresentationTime.tv_usec += (long)(pictureFractionOfSecond*1000000.0);
00095   if (fPresentationTime.tv_usec >= 1000000) {
00096     fPresentationTime.tv_usec -= 1000000;
00097     ++fPresentationTime.tv_sec;
00098   }
00099 #ifdef DEBUG
00100   if (firstPT.tv_sec == 0 && firstPT.tv_usec == 0) firstPT = fPresentationTime;
00101   struct timeval diffPT;
00102   diffPT.tv_sec = fPresentationTime.tv_sec - firstPT.tv_sec;
00103   diffPT.tv_usec = fPresentationTime.tv_usec - firstPT.tv_usec;
00104   if (fPresentationTime.tv_usec < firstPT.tv_usec) {
00105     --diffPT.tv_sec;
00106     diffPT.tv_usec += 1000000;
00107   }
00108   fprintf(stderr, "MPEGVideoStreamFramer::computePresentationTime(%d) -> %lu.%06ld [%lu.%06ld]\n", numAdditionalPictures, fPresentationTime.tv_sec, fPresentationTime.tv_usec, diffPT.tv_sec, diffPT.tv_usec);
00109 #endif
00110 }

void MPEGVideoStreamFramer::setTimeCode	(	unsigned	hours,
		unsigned	minutes,
		unsigned	seconds,
		unsigned	pictures,
		unsigned	picturesSinceLastGOP
	)			`[protected, inherited]`

Definition at line 113 of file MPEGVideoStreamFramer.cpp.

References TimeCode::days, MPEGVideoStreamFramer::fCurGOPTimeCode, MPEGVideoStreamFramer::fFrameRate, MPEGVideoStreamFramer::fHaveSeenFirstTimeCode, MPEGVideoStreamFramer::fPicturesAdjustment, MPEGVideoStreamFramer::fPictureTimeBase, MPEGVideoStreamFramer::fPrevGOPTimeCode, MPEGVideoStreamFramer::fTcSecsBase, TimeCode::hours, TimeCode::minutes, TimeCode::pictures, TimeCode::seconds, and True.

Referenced by MPEG1or2VideoStreamParser::parseGOPHeader(), and MPEG4VideoStreamParser::parseGroupOfVideoObjectPlane().

00114                                                                 {
00115   TimeCode& tc = fCurGOPTimeCode; // abbrev
00116   unsigned days = tc.days;
00117   if (hours < tc.hours) {
00118     // Assume that the 'day' has wrapped around:
00119     ++days;
00120   }
00121   tc.days = days;
00122   tc.hours = hours;
00123   tc.minutes = minutes;
00124   tc.seconds = seconds;
00125   tc.pictures = pictures;
00126   if (!fHaveSeenFirstTimeCode) {
00127     fPictureTimeBase = fFrameRate == 0.0 ? 0.0 : tc.pictures/fFrameRate;
00128     fTcSecsBase = (((tc.days*24)+tc.hours)*60+tc.minutes)*60+tc.seconds;
00129     fHaveSeenFirstTimeCode = True;
00130   } else if (fCurGOPTimeCode == fPrevGOPTimeCode) {
00131     // The time code has not changed since last time.  Adjust for this:
00132     fPicturesAdjustment += picturesSinceLastGOP;
00133   } else {
00134     // Normal case: The time code changed since last time.
00135     fPrevGOPTimeCode = tc;
00136     fPicturesAdjustment = 0;
00137   }
00138 }

FramedSource* FramedFilter::inputSource ( ) const [inline, inherited]

Definition at line 30 of file FramedFilter.hh.

References FramedFilter::fInputSource.

Referenced by AC3AudioStreamFramer::AC3AudioStreamFramer(), EndianSwap16::createNew(), HostFromNetworkOrder16::createNew(), NetworkFromHostOrder16::createNew(), PCMFromuLawAudioSource::createNew(), QCELPDeinterleaver::createNew(), MPEG4VideoStreamFramer::createNew(), createNew(), MPEG2IFrameIndexFromTransportStream::createNew(), MPEG1or2VideoStreamFramer::createNew(), MPEG1or2VideoStreamDiscreteFramer::createNew(), MPEG1or2AudioStreamFramer::createNew(), MP3Transcoder::createNew(), MP3ADUTranscoder::createNew(), MP3ADUdeinterleaver::createNew(), MP3ADUinterleaver::createNew(), MP3FromADUSource::createNew(), ADUFromMP3Source::createNew(), H263plusVideoStreamFramer::createNew(), AC3AudioStreamFramer::createNew(), H264VideoRTPSink::doSpecialFrameHandling(), MP3ADUinterleaverBase::getInputSource(), H263plusVideoStreamFramer::H263plusVideoStreamFramer(), MPEG1or2VideoStreamFramer::MPEG1or2VideoStreamFramer(), MPEG4VideoStreamFramer::MPEG4VideoStreamFramer(), MP3AudioFileServerMediaSubsession::seekStreamSource(), ClientTrickPlayState::setSource(), and MP3AudioFileServerMediaSubsession::setStreamSourceScale().

00030 { return fInputSource; }

char const * FramedFilter::MIMEtype ( ) const [protected, virtual, inherited]

Reimplemented from MediaSource.

Reimplemented in ADUFromMP3Source, and MP3FromADUSource.

Definition at line 39 of file FramedFilter.cpp.

References FramedFilter::fInputSource, MediaSource::MIMEtype(), and NULL.

00039                                          {
00040   if (fInputSource == NULL) return "";
00041 
00042   return fInputSource->MIMEtype();
00043 }

void FramedFilter::getAttributes ( ) const [protected, virtual, inherited]

Reimplemented from MediaSource.

Reimplemented in MP3ADUTranscoder.

Definition at line 45 of file FramedFilter.cpp.

References FramedFilter::fInputSource, MediaSource::getAttributes(), and NULL.

00045                                        {
00046   if (fInputSource != NULL) fInputSource->getAttributes();
00047 }

void FramedFilter::doStopGettingFrames ( ) [protected, virtual, inherited]

Reimplemented from FramedSource.

Reimplemented in MPEG2TransportStreamFramer, and MPEG2TransportStreamTrickModeFilter.

Definition at line 49 of file FramedFilter.cpp.

References FramedFilter::fInputSource, NULL, and FramedSource::stopGettingFrames().

Referenced by MPEG2TransportStreamTrickModeFilter::doStopGettingFrames(), and MPEG2TransportStreamFramer::doStopGettingFrames().

00049                                        {
00050   if (fInputSource != NULL) fInputSource->stopGettingFrames();
00051 }

Boolean FramedSource::lookupByName	(	UsageEnvironment &	env,
		char const *	sourceName,
		FramedSource *&	resultSource
	)			`[static, inherited]`

Definition at line 41 of file FramedSource.cpp.

References env, False, MediaSource::isFramedSource(), MediaSource::lookupByName(), NULL, and True.

Referenced by MP3ADUinterleaverBase::getInputSource().

00042                                                                 {
00043   resultSource = NULL; // unless we succeed
00044 
00045   MediaSource* source;
00046   if (!MediaSource::lookupByName(env, sourceName, source)) return False;
00047 
00048   if (!source->isFramedSource()) {
00049     env.setResultMsg(sourceName, " is not a framed source");
00050     return False;
00051   }
00052 
00053   resultSource = (FramedSource*)source;
00054   return True;
00055 }

Boolean MediaSource::lookupByName	(	UsageEnvironment &	env,
		char const *	sourceName,
		MediaSource *&	resultSource
	)			`[static, inherited]`

Definition at line 62 of file MediaSource.cpp.

References env, False, Medium::isSource(), Medium::lookupByName(), NULL, and True.

Referenced by RTPSource::lookupByName(), and FramedSource::lookupByName().

00064                                                               {
00065   resultSource = NULL; // unless we succeed
00066 
00067   Medium* medium;
00068   if (!Medium::lookupByName(env, sourceName, medium)) return False;
00069 
00070   if (!medium->isSource()) {
00071     env.setResultMsg(sourceName, " is not a media source");
00072     return False;
00073   }
00074 
00075   resultSource = (MediaSource*)medium;
00076   return True;
00077 }

Boolean Medium::lookupByName	(	UsageEnvironment &	env,
		char const *	mediumName,
		Medium *&	resultMedium
	)			`[static, inherited]`

Definition at line 65 of file Media.cpp.

References env, False, MediaLookupTable::lookup(), NULL, MediaLookupTable::ourMedia(), UsageEnvironment::setResultMsg(), and True.

Referenced by ServerMediaSession::lookupByName(), RTSPServer::lookupByName(), RTSPClient::lookupByName(), RTCPInstance::lookupByName(), MediaSource::lookupByName(), MediaSink::lookupByName(), MediaSession::lookupByName(), and DarwinInjector::lookupByName().

00066                                                          {
00067   resultMedium = MediaLookupTable::ourMedia(env)->lookup(mediumName);
00068   if (resultMedium == NULL) {
00069     env.setResultMsg("Medium ", mediumName, " does not exist");
00070     return False;
00071   }
00072 
00073   return True;
00074 }

void FramedSource::getNextFrame	(	unsigned char *	to,
		unsigned	maxSize,
		afterGettingFunc *	afterGettingFunc,
		void *	afterGettingClientData,
		onCloseFunc *	onCloseFunc,
		void *	onCloseClientData
	)			`[inherited]`

Definition at line 57 of file FramedSource.cpp.

References FramedSource::doGetNextFrame(), Medium::envir(), FramedSource::fAfterGettingClientData, FramedSource::fAfterGettingFunc, FramedSource::fDurationInMicroseconds, FramedSource::fIsCurrentlyAwaitingData, FramedSource::fMaxSize, FramedSource::fNumTruncatedBytes, FramedSource::fOnCloseClientData, FramedSource::fOnCloseFunc, FramedSource::fTo, and True.

Referenced by MPEG2TransportStreamFramer::afterGettingFrame1(), InputESSourceRecord::askForNewData()<

MPEG4VideoStreamDiscreteFramer Class Reference

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