live: WAVAudioFileSource Class Reference

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.

WAVAudioFileSource::WAVAudioFileSource	(	UsageEnvironment &	env,
		FILE *	fid
	)			`[protected]`

Definition at line 105 of file WAVAudioFileSource.cpp.

References AudioInputDevice::bitsPerSample(), env, False, fAudioFormat, AudioInputDevice::fBitsPerSample, AudioInputDevice::fNumChannels, fPlayTimePerSample, fPreferredFrameSize, AudioInputDevice::fSamplingFrequency, fWAVHeaderSize, get2Bytes(), get4Bytes(), nextc, AudioInputDevice::numChannels(), UsageEnvironment::setResultMsg(), skipBytes(), TellFile64(), True, WA_IMA_ADPCM, WA_PCM, WA_PCMA, and WA_PCMU.

Referenced by createNew().

00106   : AudioInputDevice(env, 0, 0, 0, 0)/* set the real parameters later */,
00107     fFid(fid), fLastPlayTime(0), fWAVHeaderSize(0), fFileSize(0), fScaleFactor(1),
00108     fLimitNumBytesToStream(False), fNumBytesToStream(0), fAudioFormat(WA_UNKNOWN) {
00109   // Check the WAV file header for validity.
00110   // Note: The following web pages contain info about the WAV format:
00111   // http://www.ringthis.com/dev/wave_format.htm
00112   // http://www.lightlink.com/tjweber/StripWav/Canon.html
00113   // http://www.wotsit.org/list.asp?al=W
00114 
00115   Boolean success = False; // until we learn otherwise
00116   do {
00117     // RIFF Chunk:
00118     if (nextc != 'R' || nextc != 'I' || nextc != 'F' || nextc != 'F') break;
00119     if (!skipBytes(fid, 4)) break;
00120     if (nextc != 'W' || nextc != 'A' || nextc != 'V' || nextc != 'E') break;
00121 
00122     // FORMAT Chunk:
00123     if (nextc != 'f' || nextc != 'm' || nextc != 't' || nextc != ' ') break;
00124     unsigned formatLength;
00125     if (!get4Bytes(fid, formatLength)) break;
00126     unsigned short audioFormat;
00127     if (!get2Bytes(fid, audioFormat)) break;
00128 
00129     fAudioFormat = (unsigned char)audioFormat;
00130     if (fAudioFormat != WA_PCM && fAudioFormat != WA_PCMA && fAudioFormat != WA_PCMU && fAudioFormat != WA_IMA_ADPCM) {
00131       // It's a format that we don't (yet) understand
00132       env.setResultMsg("Audio format is not one that we handle (PCM/PCMU/PCMA or IMA ADPCM)");
00133       break;
00134     }
00135     unsigned short numChannels;
00136     if (!get2Bytes(fid, numChannels)) break;
00137     fNumChannels = (unsigned char)numChannels;
00138     if (fNumChannels < 1 || fNumChannels > 2) { // invalid # channels
00139       char errMsg[100];
00140       sprintf(errMsg, "Bad # channels: %d", fNumChannels);
00141       env.setResultMsg(errMsg);
00142       break;
00143     }
00144     if (!get4Bytes(fid, fSamplingFrequency)) break;
00145     if (fSamplingFrequency == 0) {
00146       env.setResultMsg("Bad sampling frequency: 0");
00147       break;
00148     }
00149     if (!skipBytes(fid, 6)) break; // "nAvgBytesPerSec" (4 bytes) + "nBlockAlign" (2 bytes)
00150     unsigned short bitsPerSample;
00151     if (!get2Bytes(fid, bitsPerSample)) break;
00152     fBitsPerSample = (unsigned char)bitsPerSample;
00153     if (fBitsPerSample == 0) {
00154       env.setResultMsg("Bad bits-per-sample: 0");
00155       break;
00156     }
00157     if (!skipBytes(fid, formatLength - 16)) break;
00158 
00159     // FACT chunk (optional):
00160     int c = nextc;
00161     if (c == 'f') {
00162       if (nextc != 'a' || nextc != 'c' || nextc != 't') break;
00163       unsigned factLength;
00164       if (!get4Bytes(fid, factLength)) break;
00165       if (!skipBytes(fid, factLength)) break;
00166       c = nextc;
00167     }
00168 
00169     // DATA Chunk:
00170     if (c != 'd' || nextc != 'a' || nextc != 't' || nextc != 'a') break;
00171     if (!skipBytes(fid, 4)) break;
00172 
00173     // The header is good; the remaining data are the sample bytes.
00174     fWAVHeaderSize = (unsigned)TellFile64(fid);
00175     success = True;
00176   } while (0);
00177 
00178   if (!success) {
00179     env.setResultMsg("Bad WAV file format");
00180     // Set "fBitsPerSample" to zero, to indicate failure:
00181     fBitsPerSample = 0;
00182     return;
00183   }
00184 
00185   fPlayTimePerSample = 1e6/(double)fSamplingFrequency;
00186 
00187   // Although PCM is a sample-based format, we group samples into
00188   // 'frames' for efficient delivery to clients.  Set up our preferred
00189   // frame size to be close to 20 ms, if possible, but always no greater
00190   // than 1400 bytes (to ensure that it will fit in a single RTP packet)
00191   unsigned maxSamplesPerFrame = (1400*8)/(fNumChannels*fBitsPerSample);
00192   unsigned desiredSamplesPerFrame = (unsigned)(0.02*fSamplingFrequency);
00193   unsigned samplesPerFrame = desiredSamplesPerFrame < maxSamplesPerFrame ? desiredSamplesPerFrame : maxSamplesPerFrame;
00194   fPreferredFrameSize = (samplesPerFrame*fNumChannels*fBitsPerSample)/8;
00195 }

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

Definition at line 197 of file WAVAudioFileSource.cpp.

References CloseInputFile(), and fFid.

00197                                         {
00198   CloseInputFile(fFid);
00199 }

WAVAudioFileSource * WAVAudioFileSource::createNew	(	UsageEnvironment &	env,
		char const *	fileName
	)			`[static]`

Definition at line 28 of file WAVAudioFileSource.cpp.

References AudioInputDevice::bitsPerSample(), Medium::close(), env, fFileSize, GetFileSize(), NULL, OpenInputFile(), and WAVAudioFileSource().

Referenced by WAVAudioFileServerMediaSubsession::createNewStreamSource().

00028                                                                          {
00029   do {
00030     FILE* fid = OpenInputFile(env, fileName);
00031     if (fid == NULL) break;
00032 
00033     WAVAudioFileSource* newSource = new WAVAudioFileSource(env, fid);
00034     if (newSource != NULL && newSource->bitsPerSample() == 0) {
00035       // The WAV file header was apparently invalid.
00036       Medium::close(newSource);
00037       break;
00038     }
00039 
00040     newSource->fFileSize = (unsigned)GetFileSize(fileName, fid);
00041 
00042     return newSource;
00043   } while (0);
00044 
00045   return NULL;
00046 }

unsigned WAVAudioFileSource::numPCMBytes ( ) const

Definition at line 48 of file WAVAudioFileSource.cpp.

References fFileSize, and fWAVHeaderSize.

Referenced by WAVAudioFileServerMediaSubsession::createNewStreamSource().

00048                                                {
00049   if (fFileSize < fWAVHeaderSize) return 0;
00050   return fFileSize - fWAVHeaderSize;
00051 }

void WAVAudioFileSource::setScaleFactor ( int scale )

Definition at line 53 of file WAVAudioFileSource.cpp.

References AudioInputDevice::fBitsPerSample, fFid, AudioInputDevice::fNumChannels, fScaleFactor, SeekFile64(), and TellFile64().

Referenced by WAVAudioFileServerMediaSubsession::setStreamSourceScale().

00053                                                  {
00054   fScaleFactor = scale;
00055 
00056   if (fScaleFactor < 0 && TellFile64(fFid) > 0) {
00057     // Because we're reading backwards, seek back one sample, to ensure that
00058     // (i)  we start reading the last sample before the start point, and
00059     // (ii) we don't hit end-of-file on the first read.
00060     int bytesPerSample = (fNumChannels*fBitsPerSample)/8;
00061     if (bytesPerSample == 0) bytesPerSample = 1;
00062     SeekFile64(fFid, -bytesPerSample, SEEK_CUR);
00063   }
00064 }

void WAVAudioFileSource::seekToPCMByte	(	unsigned	byteNumber,
		unsigned	numBytesToStream
	)

Definition at line 66 of file WAVAudioFileSource.cpp.

References fFid, fFileSize, fLimitNumBytesToStream, fNumBytesToStream, fWAVHeaderSize, and SeekFile64().

Referenced by WAVAudioFileServerMediaSubsession::seekStreamSource().

00066                                                                                      {
00067   byteNumber += fWAVHeaderSize;
00068   if (byteNumber > fFileSize) byteNumber = fFileSize;
00069 
00070   SeekFile64(fFid, byteNumber, SEEK_SET);
00071 
00072   fNumBytesToStream = numBytesToStream;
00073   fLimitNumBytesToStream = fNumBytesToStream > 0;
00074 }

unsigned char WAVAudioFileSource::getAudioFormat ( )

Definition at line 76 of file WAVAudioFileSource.cpp.

References fAudioFormat.

Referenced by WAVAudioFileServerMediaSubsession::createNewStreamSource().

00076                                                  {
00077   return fAudioFormat;
00078 }

void WAVAudioFileSource::doGetNextFrame ( ) [private, virtual]

Implements FramedSource.

Definition at line 203 of file WAVAudioFileSource.cpp.

References FramedSource::afterGetting(), Medium::envir(), AudioInputDevice::fBitsPerSample, FramedSource::fDurationInMicroseconds, fFid, FramedSource::fFrameSize, fLastPlayTime, fLimitNumBytesToStream, FramedSource::fMaxSize, fNumBytesToStream, AudioInputDevice::fNumChannels, fPlayTimePerSample, fPreferredFrameSize, FramedSource::fPresentationTime, fScaleFactor, FramedSource::fTo, FramedSource::handleClosure(), Medium::nextTask(), NULL, TaskScheduler::scheduleDelayedTask(), SeekFile64(), and UsageEnvironment::taskScheduler().

00203                                         {
00204   if (feof(fFid) || ferror(fFid) || (fLimitNumBytesToStream && fNumBytesToStream == 0)) {
00205     handleClosure(this);
00206     return;
00207   }
00208 
00209   // Try to read as many bytes as will fit in the buffer provided (or "fPreferredFrameSize" if less)
00210   if (fLimitNumBytesToStream && fNumBytesToStream < fMaxSize) {
00211     fMaxSize = fNumBytesToStream;
00212   }
00213   if (fPreferredFrameSize < fMaxSize) {
00214     fMaxSize = fPreferredFrameSize;
00215   }
00216   unsigned bytesPerSample = (fNumChannels*fBitsPerSample)/8;
00217   if (bytesPerSample == 0) bytesPerSample = 1; // because we can't read less than a byte at a time
00218   unsigned bytesToRead = fMaxSize - fMaxSize%bytesPerSample;
00219   if (fScaleFactor == 1) {
00220     // Common case - read samples in bulk:
00221     fFrameSize = fread(fTo, 1, bytesToRead, fFid);
00222     fNumBytesToStream -= fFrameSize;
00223   } else {
00224     // We read every 'fScaleFactor'th sample:
00225     fFrameSize = 0;
00226     while (bytesToRead > 0) {
00227       size_t bytesRead = fread(fTo, 1, bytesPerSample, fFid);
00228       if (bytesRead <= 0) break;
00229       fTo += bytesRead;
00230       fFrameSize += bytesRead;
00231       fNumBytesToStream -= bytesRead;
00232       bytesToRead -= bytesRead;
00233 
00234       // Seek to the appropriate place for the next sample:
00235       SeekFile64(fFid, (fScaleFactor-1)*bytesPerSample, SEEK_CUR);
00236     }
00237   }
00238 
00239   // Set the 'presentation time' and 'duration' of this frame:
00240   if (fPresentationTime.tv_sec == 0 && fPresentationTime.tv_usec == 0) {
00241     // This is the first frame, so use the current time:
00242     gettimeofday(&fPresentationTime, NULL);
00243   } else {
00244     // Increment by the play time of the previous data:
00245     unsigned uSeconds   = fPresentationTime.tv_usec + fLastPlayTime;
00246     fPresentationTime.tv_sec += uSeconds/1000000;
00247     fPresentationTime.tv_usec = uSeconds%1000000;
00248   }
00249 
00250   // Remember the play time of this data:
00251   fDurationInMicroseconds = fLastPlayTime
00252     = (unsigned)((fPlayTimePerSample*fFrameSize)/bytesPerSample);
00253 
00254   // Switch to another task, and inform the reader that he has data:
00255 #if defined(__WIN32__) || defined(_WIN32)
00256   // HACK: One of our applications that uses this source uses an
00257   // implementation of scheduleDelayedTask() that performs very badly
00258   // (chewing up lots of CPU time, apparently polling) on Windows.
00259   // Until this is fixed, we just call our "afterGetting()" function
00260   // directly.  This avoids infinite recursion, as long as our sink
00261   // is discontinuous, which is the case for the RTP sink that
00262   // this application uses. #####
00263   afterGetting(this);
00264 #else
00265   nextTask() = envir().taskScheduler().scheduleDelayedTask(0,
00266                         (TaskFunc*)FramedSource::afterGetting, this);
00267 #endif
00268 }

Boolean WAVAudioFileSource::setInputPort ( int portIndex ) [private, virtual]

Implements AudioInputDevice.

Definition at line 270 of file WAVAudioFileSource.cpp.

References True.

00270                                                           {
00271   return True;
00272 }

double WAVAudioFileSource::getAverageLevel ( ) const [private, virtual]

Implements AudioInputDevice.

Definition at line 274 of file WAVAudioFileSource.cpp.

00274                                                  {
00275   return 0.0;//##### fix this later
00276 }

unsigned char AudioInputDevice::bitsPerSample ( ) const [inline, inherited]

Definition at line 38 of file AudioInputDevice.hh.

References AudioInputDevice::fBitsPerSample.

Referenced by createNew(), WAVAudioFileServerMediaSubsession::createNewStreamSource(), and WAVAudioFileSource().

00038 { return fBitsPerSample; }

unsigned char AudioInputDevice::numChannels ( ) const [inline, inherited]

Definition at line 39 of file AudioInputDevice.hh.

References AudioInputDevice::fNumChannels.

Referenced by WAVAudioFileServerMediaSubsession::createNewStreamSource(), and WAVAudioFileSource().

00039 { return fNumChannels; }

unsigned AudioInputDevice::samplingFrequency ( ) const [inline, inherited]

Definition at line 40 of file AudioInputDevice.hh.

References AudioInputDevice::fSamplingFrequency.

Referenced by WAVAudioFileServerMediaSubsession::createNewStreamSource().

00040 { return fSamplingFrequency; }

static AudioInputDevice* AudioInputDevice::createNew	(	UsageEnvironment &	env,
		int	inputPortNumber,
		unsigned char	bitsPerSample,
		unsigned char	numChannels,
		unsigned	samplingFrequency,
		unsigned	granularityInMS = `20`
	)			`[static, inherited]`

static AudioPortNames* AudioInputDevice::getPortNames ( ) [static, inherited]

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 65 of file MediaSource.cpp.

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

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

00067                                                               {
00068   resultSource = NULL; // unless we succeed
00069 
00070   Medium* medium;
00071   if (!Medium::lookupByName(env, sourceName, medium)) return False;
00072 
00073   if (!medium->isSource()) {
00074     env.setResultMsg(sourceName, " is not a media source");
00075     return False;
00076   }
00077 
00078   resultSource = (MediaSource*)medium;
00079   return True;
00080 }

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

Definition at line 41 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().

00042                                                          {
00043   resultMedium = MediaLookupTable::ourMedia(env)->lookup(mediumName);
00044   if (resultMedium == NULL) {
00045     env.setResultMsg("Medium ", mediumName, " does not exist");
00046     return False;
00047   }
00048 
00049   return True;
00050 }

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, UsageEnvironment::internalError(), and True.

00061                                                          {
00062   // Make sure we're not already being read:
00063   if (fIsCurrentlyAwaitingData) {
00064     envir() << "FramedSource[" << this << "]::getNextFrame(): attempting to read more than once at the same time!\n";
00065     envir().internalError();
00066   }
00067 
00068   fTo = to;
00069   fMaxSize = maxSize;
00070   fNumTruncatedBytes = 0; // by default; could be changed by doGetNextFrame()
00071   fDurationInMicroseconds = 0; // by default; could be changed by doGetNextFrame()
00072   fAfterGettingFunc = afterGettingFunc;
00073   fAfterGettingClientData = afterGettingClientData;
00074   fOnCloseFunc = onCloseFunc;
00075   fOnCloseClientData = onCloseClientData;
00076   fIsCurrentlyAwaitingData = True;
00077 
00078   doGetNextFrame();
00079 }

void FramedSource::handleClosure ( void * clientData ) [static, inherited]

Definition at line 95 of file FramedSource.cpp.

References False, FramedSource::fIsCurrentlyAwaitingData, FramedSource::fOnCloseClientData, FramedSource::fOnCloseFunc, and NULL.

00095                                                  {
00096   FramedSource* source = (FramedSource*)clientData;
00097   source->fIsCurrentlyAwaitingData = False; // because we got a close instead
00098   if (source->fOnCloseFunc != NULL) {
00099     (*(source->fOnCloseFunc))(source->fOnCloseClientData);
00100   }
00101 }

void FramedSource::stopGettingFrames ( ) [inherited]

Definition at line 103 of file FramedSource.cpp.

References FramedSource::doStopGettingFrames(), False, and FramedSource::fIsCurrentlyAwaitingData.

Referenced by StreamReplicator::deactivateStreamReplica(), QCELPDeinterleaver::doStopGettingFrames(), MPEG2TransportStreamFromPESSource::doStopGettingFrames(), FramedFilter::doStopGettingFrames(), AMRDeinterleaver::doStopGettingFrames(), and MediaSink::stopPlaying().

00103                                      {
00104   fIsCurrentlyAwaitingData = False; // indicates that we can be read again
00105 
00106   // Perform any specialized action now:
00107   doStopGettingFrames();
00108 }

unsigned FramedSource::maxFrameSize ( ) const [virtual, inherited]

Reimplemented in MPEG1or2DemuxedElementaryStream.

Definition at line 116 of file FramedSource.cpp.

Referenced by StreamParser::ensureValidBytes1().

00116                                           {
00117   // By default, this source has no maximum frame size.
00118   return 0;
00119 }

Boolean FramedSource::isCurrentlyAwaitingData ( ) const [inline, inherited]

void FramedSource::afterGetting ( FramedSource * source ) [static, inherited]

Definition at line 81 of file FramedSource.cpp.

References FramedSource::fAfterGettingClientData, FramedSource::fAfterGettingFunc, False, FramedSource::fDurationInMicroseconds, FramedSource::fFrameSize, FramedSource::fIsCurrentlyAwaitingData, FramedSource::fNumTruncatedBytes, FramedSource::fPresentationTime, and NULL.

00081                                                     {
00082   source->fIsCurrentlyAwaitingData = False;
00083       // indicates that we can be read again
00084       // Note that this needs to be done here, in case the "fAfterFunc"
00085       // called below tries to read another frame (which it usually will)
00086 
00087   if (source->fAfterGettingFunc != NULL) {
00088     (*(source->fAfterGettingFunc))(source->fAfterGettingClientData,
00089                                    source->fFrameSize, source->fNumTruncatedBytes,
00090                                    source->fPresentationTime,
00091                                    source->fDurationInMicroseconds);
00092   }
00093 }

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

Reimplemented in AMRDeinterleaver, BasicUDPSource, ByteStreamFileSource, FramedFilter, MPEG1or2DemuxedElementaryStream, MPEG2TransportStreamFramer, MPEG2TransportStreamFromESSource, MPEG2TransportStreamFromPESSource, MPEG2TransportStreamTrickModeFilter, MultiFramedRTPSource, T140IdleFilter, QCELPDeinterleaver, and StreamReplica.

Definition at line 110 of file FramedSource.cpp.

Referenced by FramedSource::stopGettingFrames().

00110                                        {
00111   // Default implementation: Do nothing
00112   // Subclasses may wish to specialize this so as to ensure that a
00113   // subsequent reader can pick up where this one left off.
00114 }

void MediaSource::getAttributes ( ) const [virtual, inherited]

Reimplemented in FramedFilter, MP3ADUTranscoder, MP3FileSource, and RTPSource.

Definition at line 82 of file MediaSource.cpp.

References Medium::envir(), and UsageEnvironment::setResultMsg().

Referenced by MP3ADUTranscoder::getAttributes(), and FramedFilter::getAttributes().

00082                                       {
00083   // Default implementation
00084   envir().setResultMsg("");
00085 }

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

Reimplemented in RawAMRRTPSource, AC3AudioRTPSource, AMRAudioSource, DVVideoRTPSource, FramedFilter, H261VideoRTPSource, H263plusVideoRTPSource, H264VideoRTPSource, JPEGVideoRTPSource, ADUFromMP3Source, MP3FromADUSource, MP3ADURTPSource, MP3FileSource, MPEG1or2AudioRTPSource, MPEG1or2DemuxedElementaryStream, MPEG1or2VideoRTPSource, MPEG4ESVideoRTPSource, MPEG4GenericRTPSource, MPEG4LATMAudioRTPSource, QuickTimeGenericRTPSource, SimpleRTPSource, VorbisAudioRTPSource, VP8VideoRTPSource, MatroskaDemuxedTrack, and RawQCELPRTPSource.

Definition at line 36 of file MediaSource.cpp.

Referenced by MP3ADUTranscoder::createNew(), MP3FromADUSource::createNew(), ADUFromMP3Source::createNew(), MP3ADUinterleaverBase::getInputSource(), MediaSession::initiateByMediaType(), SimpleRTPSource::MIMEtype(), QuickTimeGenericRTPSource::MIMEtype(), FramedFilter::MIMEtype(), and MPEG1or2DemuxedElementaryStream::MPEG1or2DemuxedElementaryStream().

00036                                         {
00037   return "application/OCTET-STREAM"; // default type
00038 }

Boolean MediaSource::isRTPSource ( ) const [virtual, inherited]

Reimplemented in RTPSource.

Definition at line 43 of file MediaSource.cpp.

References False.

Referenced by RTPSource::lookupByName().

00043                                        {
00044   return False; // default implementation
00045 }

Boolean MediaSource::isMPEG1or2VideoStreamFramer ( ) const [virtual, inherited]

Reimplemented in MPEG1or2VideoStreamFramer.

Definition at line 46 of file MediaSource.cpp.

References False.

Referenced by MPEG1or2VideoRTPSink::sourceIsCompatibleWithUs().

00046                                                        {
00047   return False; // default implementation
00048 }

Boolean MediaSource::isMPEG4VideoStreamFramer ( ) const [virtual, inherited]

Reimplemented in MPEG4VideoStreamFramer.

Definition at line 49 of file MediaSource.cpp.

References False.

Referenced by MPEG4ESVideoRTPSink::sourceIsCompatibleWithUs().

00049                                                     {
00050   return False; // default implementation
00051 }

Boolean MediaSource::isH264VideoStreamFramer ( ) const [virtual, inherited]

Reimplemented in H264VideoStreamFramer.

Definition at line 52 of file MediaSource.cpp.

References False.

Referenced by H264VideoRTPSink::sourceIsCompatibleWithUs().

00052                                                    {
00053   return False; // default implementation
00054 }

Boolean MediaSource::isDVVideoStreamFramer ( ) const [virtual, inherited]

Reimplemented in DVVideoStreamFramer.

Definition at line 55 of file MediaSource.cpp.

References False.

Referenced by DVVideoRTPSink::sourceIsCompatibleWithUs().

00055                                                  {
00056   return False; // default implementation
00057 }

Boolean MediaSource::isJPEGVideoSource ( ) const [virtual, inherited]

Reimplemented in JPEGVideoSource.

Definition at line 58 of file MediaSource.cpp.

References False.

Referenced by JPEGVideoRTPSink::sourceIsCompatibleWithUs().

00058                                              {
00059   return False; // default implementation
00060 }

Boolean MediaSource::isAMRAudioSource ( ) const [virtual, inherited]

Reimplemented in AMRAudioSource.

Definition at line 61 of file MediaSource.cpp.

References False.

Referenced by AMRAudioRTPSink::sourceIsCompatibleWithUs(), and AMRAudioFileSink::sourceIsCompatibleWithUs().

00061                                             {
00062   return False; // default implementation
00063 }

void Medium::close	(	UsageEnvironment &	env,
		char const *	mediumName
	)			`[static, inherited]`

Definition at line 52 of file Media.cpp.

References env, MediaLookupTable::ourMedia(), and MediaLookupTable::remove().

Referenced by afterPlaying(), Medium::close(), closeMediaSinks(), OnDemandServerMediaSubsession::closeStreamSource(), continueAfterTEARDOWN(), createNew(), QuickTimeFileSink::createNew(), QCELPAudioRTPSource::createNew(), MP3HTTPSource::createNew(), MP3FileSource::createNew(), AVIFileSink::createNew(), AMRAudioRTPSource::createNew(), WAVAudioFileServerMediaSubsession::createNewStreamSource(), MPEG1or2DemuxedServerMediaSubsession::createNewStreamSource(), MediaSubsession::deInitiate(), RTSPServerSupportingHTTPStreaming::RTSPClientSessionSupportingHTTPStreaming::handleHTTPCmd_StreamingGET(), MediaSubsession::initiate(), MPEG1or2ProgramStreamFileDuration(), MPEG1or2Demux::noteElementaryStreamDeletion(), ByteStreamMultiFileSource::onSourceClosure1(), StreamState::reclaim(), RTSPServer::removeServerMediaSession(), OnDemandServerMediaSubsession::sdpLines(), shutdownStream(), T140TextRTPSink::stopPlaying(), H264VideoRTPSink::stopPlaying(), subsessionAfterPlaying(), ClientTrickPlayState::updateStateOnScaleChange(), AMRDeinterleaver::~AMRDeinterleaver(), ByteStreamMultiFileSource::~ByteStreamMultiFileSource(), DarwinInjector::~DarwinInjector(), FramedFilter::~FramedFilter(), InputESSourceRecord::~InputESSourceRecord(), MatroskaFileParser::~MatroskaFileParser(), MatroskaFileServerDemux::~MatroskaFileServerDemux(), MPEG1or2Demux::~MPEG1or2Demux(), MPEG1or2FileServerDemux::~MPEG1or2FileServerDemux(), MPEG2TransportFileServerMediaSubsession::~MPEG2TransportFileServerMediaSubsession(), MPEG2TransportStreamFromPESSource::~MPEG2TransportStreamFromPESSource(), RTSPServerSupportingHTTPStreaming::RTSPClientSessionSupportingHTTPStreaming::~RTSPClientSessionSupportingHTTPStreaming(), ServerMediaSession::~ServerMediaSession(), ServerMediaSubsession::~ServerMediaSubsession(), StreamClientState::~StreamClientState(), and StreamReplicator::~StreamReplicator().

00052                                                           {
00053   MediaLookupTable::ourMedia(env)->remove(name);
00054 }

void Medium::close ( Medium * medium ) [static, inherited]

Definition at line 56 of file Media.cpp.

References Medium::close(), Medium::envir(), Medium::name(), and NULL.

00056                                  {
00057   if (medium == NULL) return;
00058 
00059   close(medium->envir(), medium->name());
00060 }

UsageEnvironment& Medium::envir ( ) const [inline, inherited]

Definition at line 59 of file Media.hh.

References Medium::fEnviron.

00059 {return fEnviron;}

char const* Medium::name ( ) const [inline, inherited]

Definition at line 61 of file Media.hh.

References Medium::fMediumName.

Referenced by QuickTimeFileSink::addAtom_hdlr2(), Medium::close(), MP3ADUTranscoder::createNew(), MP3FromADUSource::createNew(), ADUFromMP3Source::createNew(), and MP3FileSource::initializeStream().

00061 {return fMediumName;}

Boolean Medium::isSink ( ) const [virtual, inherited]

Reimplemented in MediaSink.

Definition at line 66 of file Media.cpp.

References False.

Referenced by MediaSink::lookupByName().

00066                              {
00067   return False; // default implementation
00068 }

Boolean Medium::isRTCPInstance ( ) const [virtual, inherited]

Reimplemented in RTCPInstance.

Definition at line 70 of file Media.cpp.

References False.

Referenced by RTCPInstance::lookupByName().

00070                                      {
00071   return False; // default implementation
00072 }

Boolean Medium::isRTSPClient ( ) const [virtual, inherited]

Reimplemented in RTSPClient.

Definition at line 74 of file Media.cpp.

References False.

Referenced by RTSPClient::lookupByName().

00074                                    {
00075   return False; // default implementation
00076 }

Boolean Medium::isRTSPServer ( ) const [virtual, inherited]

Reimplemented in RTSPServer.

Definition at line 78 of file Media.cpp.

References False.

Referenced by RTSPServer::lookupByName().

00078                                    {
00079   return False; // default implementation
00080 }

Boolean Medium::isMediaSession ( ) const [virtual, inherited]

Reimplemented in MediaSession.

Definition at line 82 of file Media.cpp.

References False.

Referenced by MediaSession::lookupByName().

00082                                      {
00083   return False; // default implementation
00084 }

Boolean Medium::isServerMediaSession ( ) const [virtual, inherited]

Reimplemented in ServerMediaSession.

Definition at line 86 of file Media.cpp.

References False.

Referenced by ServerMediaSession::lookupByName().

00086                                            {
00087   return False; // default implementation
00088 }

Boolean Medium::isDarwinInjector ( ) const [virtual, inherited]

Reimplemented in DarwinInjector.

Definition at line 90 of file Media.cpp.

References False.

Referenced by DarwinInjector::lookupByName().

00090                                        {
00091   return False; // default implementation
00092 }

TaskToken& Medium::nextTask ( ) [inline, protected, inherited]

friend class MediaLookupTable [friend, inherited]

Definition at line 74 of file Media.hh.

FILE* WAVAudioFileSource::fFid [private]

Definition at line 65 of file WAVAudioFileSource.hh.

Referenced by doGetNextFrame(), seekToPCMByte(), setScaleFactor(), and ~WAVAudioFileSource().

double WAVAudioFileSource::fPlayTimePerSample [private]

Definition at line 66 of file WAVAudioFileSource.hh.

Referenced by doGetNextFrame(), and WAVAudioFileSource().

unsigned WAVAudioFileSource::fPreferredFrameSize [private]

Definition at line 67 of file WAVAudioFileSource.hh.

Referenced by doGetNextFrame(), and WAVAudioFileSource().

unsigned WAVAudioFileSource::fLastPlayTime [private]

Definition at line 68 of file WAVAudioFileSource.hh.

Referenced by doGetNextFrame().

unsigned WAVAudioFileSource::fWAVHeaderSize [private]

Definition at line 69 of file WAVAudioFileSource.hh.

Referenced by numPCMBytes(), seekToPCMByte(), and WAVAudioFileSource().

unsigned WAVAudioFileSource::fFileSize [private]

Definition at line 70 of file WAVAudioFileSource.hh.

Referenced by createNew(), numPCMBytes(), and seekToPCMByte().

int WAVAudioFileSource::fScaleFactor [private]

Definition at line 71 of file WAVAudioFileSource.hh.

Referenced by doGetNextFrame(), and setScaleFactor().

Boolean WAVAudioFileSource::fLimitNumBytesToStream [private]

Definition at line 72 of file WAVAudioFileSource.hh.

Referenced by doGetNextFrame(), and seekToPCMByte().

unsigned WAVAudioFileSource::fNumBytesToStream [private]

Definition at line 73 of file WAVAudioFileSource.hh.

Referenced by doGetNextFrame(), and seekToPCMByte().

unsigned char WAVAudioFileSource::fAudioFormat [private]

Definition at line 74 of file WAVAudioFileSource.hh.

Referenced by getAudioFormat(), and WAVAudioFileSource().

char ** AudioInputDevice::allowedDeviceNames = NULL [static, inherited]

Definition at line 51 of file AudioInputDevice.hh.

unsigned char AudioInputDevice::fBitsPerSample [protected, inherited]

Definition at line 66 of file AudioInputDevice.hh.

Referenced by AudioInputDevice::bitsPerSample(), doGetNextFrame(), setScaleFactor(), and WAVAudioFileSource().

unsigned char AudioInputDevice::fNumChannels [protected, inherited]

Definition at line 66 of file AudioInputDevice.hh.

Referenced by doGetNextFrame(), AudioInputDevice::numChannels(), setScaleFactor(), and WAVAudioFileSource().

unsigned AudioInputDevice::fSamplingFrequency [protected, inherited]

Definition at line 67 of file AudioInputDevice.hh.

Referenced by AudioInputDevice::samplingFrequency(), and WAVAudioFileSource().

unsigned AudioInputDevice::fGranularityInMS [protected, inherited]

Definition at line 68 of file AudioInputDevice.hh.

unsigned char* FramedSource::fTo [protected, inherited]

Definition at line 74 of file FramedSource.hh.

unsigned FramedSource::fMaxSize [protected, inherited]

Definition at line 75 of file FramedSource.hh.

Referenced by MPEG1or2VideoStreamDiscreteFramer::afterGettingFrame1(), MP3ADUTranscoder::afterGettingFrame1(), StreamReplica::copyReceivedFrame(), StreamReplicator::deactivateStreamReplica(), MPEG2TransportStreamMultiplexor::deliverDataToClient(), DeviceSource::deliverFrame(), T140IdleFilter::deliverFromBuffer(), MPEG2IFrameIndexFromTransportStream::deliverIndexRecord(), StreamReplicator::deliverReceivedFrame(), doGetNextFrame(), EndianSwap16::doGetNextFrame(), HostFromNetworkOrder16::doGetNextFrame(), NetworkFromHostOrder16::doGetNextFrame(), PCMFromuLawAudioSource::doGetNextFrame(), uLawFromPCMAudioSource::doGetNextFrame(), QCELPDeinterleaver::doGetNextFrame(), MultiFramedRTPSource::doGetNextFrame(), MPEGVideoStreamFramer::doGetNextFrame(), MPEG4VideoStreamDiscreteFramer::doGetNextFrame(), MPEG2TransportStreamTrickModeFilter::doGetNextFrame(), MPEG2TransportStreamFramer::doGetNextFrame(), MPEG1or2VideoStreamDiscreteFramer::doGetNextFrame(), MPEG1or2DemuxedElementaryStream::doGetNextFrame(), MPEG1or2AudioStreamFramer::doGetNextFrame(), H264VideoStreamDiscreteFramer::doGetNextFrame(), H264FUAFragmenter::doGetNextFrame(), H263plusVideoStreamFramer::doGetNextFrame(), DVVideoStreamFramer::doGetNextFrame(), ByteStreamMultiFileSource::doGetNextFrame(), ByteStreamMemoryBufferSource::doGetNextFrame(), AMRDeinterleaver::doGetNextFrame(), AMRAudioFileSource::doGetNextFrame(), ADTSAudioFileSource::doGetNextFrame(), AC3AudioStreamFramer::doGetNextFrame(), MultiFramedRTPSource::doGetNextFrame1(), MP3FileSource::doGetNextFrame1(), ADUFromMP3Source::doGetNextFrame1(), ByteStreamFileSource::doReadFromFile(), DVVideoStreamFramer::getAndDeliverData(), StreamReplicator::getNextFrame(), FramedSource::getNextFrame(), BasicUDPSource::incomingPacketHandler1(), MatroskaDemuxedTrack::maxSize(), MP3ADUdeinterleaver::releaseOutgoingFrame(), and MP3ADUinterleaver::releaseOutgoingFrame().

unsigned FramedSource::fFrameSize [protected, inherited]

Definition at line 76 of file FramedSource.hh.

Referenced by FramedSource::afterGetting(), StreamReplicator::afterGettingFrame(), ByteStreamMultiFileSource::afterGettingFrame(), EndianSwap16::afterGettingFrame1(), HostFromNetworkOrder16::afterGettingFrame1(), NetworkFromHostOrder16::afterGettingFrame1(), PCMFromuLawAudioSource::afterGettingFrame1(), uLawFromPCMAudioSource::afterGettingFrame1(), MPEG2TransportStreamFramer::afterGettingFrame1(), MPEG1or2DemuxedElementaryStream::afterGettingFrame1(), MP3ADUTranscoder::afterGettingFrame1(), H264VideoStreamDiscreteFramer::afterGettingFrame1(), MPEG2TransportStreamTrickModeFilter::attemptDeliveryToClient(), MPEGVideoStreamFramer::continueReadProcessing(), MPEG1or2AudioStreamFramer::continueReadProcessing(), H263plusVideoStreamFramer::continueReadProcessing(), StreamReplica::copyReceivedFrame(), MPEG2TransportStreamMultiplexor::deliverDataToClient(), T140IdleFilter::deliverEmptyFrame(), DeviceSource::deliverFrame(), T140IdleFilter::deliverFromBuffer(), MPEG2IFrameIndexFromTransportStream::deliverIndexRecord(), doGetNextFrame(), QCELPDeinterleaver::doGetNextFrame(), MultiFramedRTPSource::doGetNextFrame(), MPEG2TransportStreamTrickModeFilter::doGetNextFrame(), MPEG2TransportStreamFramer::doGetNextFrame(), H264FUAFragmenter::doGetNextFrame(), DVVideoStreamFramer::doGetNextFrame(), ByteStreamMemoryBufferSource::doGetNextFrame(), AMRDeinterleaver::doGetNextFrame(), AMRAudioFileSource::doGetNextFrame(), ADTSAudioFileSource::doGetNextFrame(), MultiFramedRTPSource::doGetNextFrame1(), MP3FileSource::doGetNextFrame1(), ADUFromMP3Source::doGetNextFrame1(), ByteStreamFileSource::doReadFromFile(), MatroskaDemuxedTrack::frameSize(), MP3FromADUSource::generateFrameFromHeadADU(), DVVideoStreamFramer::getAndDeliverData(), BasicUDPSource::incomingPacketHandler1(), AC3AudioStreamFramer::parseNextFrame(), MP3ADUdeinterleaver::releaseOutgoingFrame(), and MP3ADUinterleaver::releaseOutgoingFrame().

unsigned FramedSource::fNumTruncatedBytes [protected, inherited]

Definition at line 77 of file FramedSource.hh.

struct timeval FramedSource::fPresentationTime [read, protected, inherited]

Definition at line 78 of file FramedSource.hh.

unsigned FramedSource::fDurationInMicroseconds [protected, inherited]

Definition at line 79 of file FramedSource.hh.


Public Types
typedef void(	afterGettingFunc )(void *clientData, unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime, unsigned durationInMicroseconds)
typedef void(	onCloseFunc )(void *clientData)
Public Member Functions
unsigned	numPCMBytes () const
void	setScaleFactor (int scale)
void	seekToPCMByte (unsigned byteNumber, unsigned numBytesToStream)
unsigned char	getAudioFormat ()
unsigned char	bitsPerSample () const
unsigned char	numChannels () const
unsigned	samplingFrequency () 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 void	getAttributes () const
virtual char const *	MIMEtype () const
virtual Boolean	isRTPSource () const
virtual Boolean	isMPEG1or2VideoStreamFramer () const
virtual Boolean	isMPEG4VideoStreamFramer () const
virtual Boolean	isH264VideoStreamFramer () const
virtual Boolean	isDVVideoStreamFramer () 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 WAVAudioFileSource *	createNew (UsageEnvironment &env, char const *fileName)
static AudioInputDevice *	createNew (UsageEnvironment &env, int inputPortNumber, unsigned char bitsPerSample, unsigned char numChannels, unsigned samplingFrequency, unsigned granularityInMS=20)
static AudioPortNames *	getPortNames ()
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	afterGetting (FramedSource *source)
static void	close (UsageEnvironment &env, char const *mediumName)
static void	close (Medium *medium)
Static Public Attributes
static char **	allowedDeviceNames = NULL
Protected Member Functions
	WAVAudioFileSource (UsageEnvironment &env, FILE *fid)
virtual	~WAVAudioFileSource ()
virtual void	doStopGettingFrames ()
TaskToken &	nextTask ()
Protected Attributes
unsigned char	fBitsPerSample
unsigned char	fNumChannels
unsigned	fSamplingFrequency
unsigned	fGranularityInMS
unsigned char *	fTo
unsigned	fMaxSize
unsigned	fFrameSize
unsigned	fNumTruncatedBytes
timeval	fPresentationTime
unsigned	fDurationInMicroseconds
Private Member Functions
virtual void	doGetNextFrame ()
virtual Boolean	setInputPort (int portIndex)
virtual double	getAverageLevel () const
Private Attributes
FILE *	fFid
double	fPlayTimePerSample
unsigned	fPreferredFrameSize
unsigned	fLastPlayTime
unsigned	fWAVHeaderSize
unsigned	fFileSize
int	fScaleFactor
Boolean	fLimitNumBytesToStream
unsigned	fNumBytesToStream
unsigned char	fAudioFormat
Friends
class	MediaLookupTable

WAVAudioFileSource Class Reference

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Friends

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Field Documentation