SubstreamDescriptor Class Reference

Collaboration diagram for SubstreamDescriptor:

[legend]

Public Member Functions
	SubstreamDescriptor (RTPSink *rtpSink, RTCPInstance *rtcpInstance, unsigned trackId)
	~SubstreamDescriptor ()
SubstreamDescriptor *&	next ()
RTPSink *	rtpSink () const
RTCPInstance *	rtcpInstance () const
char const *	sdpLines () const
Private Attributes
SubstreamDescriptor *	fNext
RTPSink *	fRTPSink
RTCPInstance *	fRTCPInstance
char *	fSDPLines

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Detailed Description

Definition at line 28 of file DarwinInjector.cpp.

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Constructor & Destructor Documentation

SubstreamDescriptor::SubstreamDescriptor	(	RTPSink *	rtpSink,
		RTCPInstance *	rtcpInstance,
		unsigned	trackId
	)

Definition at line 246 of file DarwinInjector.cpp.

References RTPSink::auxSDPLine(), fRTPSink, fSDPLines, NULL, RTPSink::numChannels(), RTPSink::rtpPayloadFormatName(), RTPSink::rtpPayloadType(), RTPSink::rtpTimestampFrequency(), sdpLines(), RTPSink::sdpMediaType(), and strDup().

  : fNext(NULL), fRTPSink(rtpSink), fRTCPInstance(rtcpInstance) {
  // Create the SDP description for this substream
  char const* mediaType = fRTPSink->sdpMediaType();
  unsigned char rtpPayloadType = fRTPSink->rtpPayloadType();
  char const* rtpPayloadFormatName = fRTPSink->rtpPayloadFormatName();
  unsigned rtpTimestampFrequency = fRTPSink->rtpTimestampFrequency();
  unsigned numChannels = fRTPSink->numChannels();
  char* rtpmapLine;
  if (rtpPayloadType >= 96) {
    char* encodingParamsPart;
    if (numChannels != 1) {
      encodingParamsPart = new char[1 + 20 /* max int len */];
      sprintf(encodingParamsPart, "/%d", numChannels);
    } else {
      encodingParamsPart = strDup("");
    }
    char const* const rtpmapFmt = "a=rtpmap:%d %s/%d%s\r\n";
    unsigned rtpmapFmtSize = strlen(rtpmapFmt)
      + 3 /* max char len */ + strlen(rtpPayloadFormatName)
      + 20 /* max int len */ + strlen(encodingParamsPart);
    rtpmapLine = new char[rtpmapFmtSize];
    sprintf(rtpmapLine, rtpmapFmt,
            rtpPayloadType, rtpPayloadFormatName,
            rtpTimestampFrequency, encodingParamsPart);
    delete[] encodingParamsPart;
  } else {
    // Static payload type => no "a=rtpmap:" line
    rtpmapLine = strDup("");
  }
  unsigned rtpmapLineSize = strlen(rtpmapLine);
  char const* auxSDPLine = fRTPSink->auxSDPLine();
  if (auxSDPLine == NULL) auxSDPLine = "";
  unsigned auxSDPLineSize = strlen(auxSDPLine);

  char const* const sdpFmt =
    "m=%s 0 RTP/AVP %u\r\n"
    "%s" // "a=rtpmap:" line (if present)
    "%s" // auxilliary (e.g., "a=fmtp:") line (if present)
    "a=control:trackID=%u\r\n";
  unsigned sdpFmtSize = strlen(sdpFmt)
    + strlen(mediaType) + 3 /* max char len */
    + rtpmapLineSize
    + auxSDPLineSize
    + 20 /* max int len */;
  char* sdpLines = new char[sdpFmtSize];
  sprintf(sdpLines, sdpFmt,
          mediaType, // m= <media>
          rtpPayloadType, // m= <fmt list>
          rtpmapLine, // a=rtpmap:... (if present)
          auxSDPLine, // optional extra SDP line
          trackId); // a=control:<track-id>
  fSDPLines = strDup(sdpLines);
  delete[] sdpLines;
  delete[] rtpmapLine;
}

SubstreamDescriptor::~SubstreamDescriptor

(

)

Definition at line 304 of file DarwinInjector.cpp.

References fNext, and fSDPLines.

                                          {
  delete fSDPLines;
  delete fNext;
}

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Member Function Documentation

SubstreamDescriptor*& SubstreamDescriptor::next

(

)

[inline]

Definition at line 33 of file DarwinInjector.cpp.

References fNext.

Referenced by DarwinInjector::addStream(), and DarwinInjector::setDestination().

{ return fNext; }

RTPSink* SubstreamDescriptor::rtpSink

(

)

const [inline]

Definition at line 34 of file DarwinInjector.cpp.

References fRTPSink.

Referenced by DarwinInjector::setDestination().

{ return fRTPSink; }

RTCPInstance* SubstreamDescriptor::rtcpInstance

(

)

const [inline]

Definition at line 35 of file DarwinInjector.cpp.

References fRTCPInstance.

Referenced by DarwinInjector::setDestination().

{ return fRTCPInstance; }

char const* SubstreamDescriptor::sdpLines

(

)

const [inline]

Definition at line 36 of file DarwinInjector.cpp.

References fSDPLines.

Referenced by DarwinInjector::addStream(), DarwinInjector::setDestination(), and SubstreamDescriptor().

{ return fSDPLines; }

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Field Documentation

SubstreamDescriptor* SubstreamDescriptor::fNext [private]

Definition at line 39 of file DarwinInjector.cpp.

Referenced by next(), and ~SubstreamDescriptor().

RTPSink* SubstreamDescriptor::fRTPSink [private]

Definition at line 40 of file DarwinInjector.cpp.

Referenced by rtpSink(), and SubstreamDescriptor().

RTCPInstance* SubstreamDescriptor::fRTCPInstance [private]

Definition at line 41 of file DarwinInjector.cpp.

Referenced by rtcpInstance().

char* SubstreamDescriptor::fSDPLines [private]

Definition at line 42 of file DarwinInjector.cpp.

Referenced by sdpLines(), SubstreamDescriptor(), and ~SubstreamDescriptor().

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

• liveMedia/DarwinInjector.cpp

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