amraudiofileservermediasubsession.cpp

流媒体传输协议的实现代码,非常有用.可以支持rtsp mms等流媒体传输协议

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// "liveMedia"
// Copyright (c) 1996-2004 Live Networks, Inc.  All rights reserved.
// A 'ServerMediaSubsession' object that creates new, unicast, "RTPSink"s
// on demand, from an AMR audio file.
// Implementation

#include "AMRAudioFileServerMediaSubsession.hh"
#include "AMRAudioRTPSink.hh"
#include "AMRAudioFileSource.hh"

AMRAudioFileServerMediaSubsession*
AMRAudioFileServerMediaSubsession::createNew(UsageEnvironment& env,
					     char const* fileName,
					     Boolean reuseFirstSource) {
  return new AMRAudioFileServerMediaSubsession(env, fileName, reuseFirstSource);
}

AMRAudioFileServerMediaSubsession
::AMRAudioFileServerMediaSubsession(UsageEnvironment& env,
				    char const* fileName, Boolean reuseFirstSource)
  : FileServerMediaSubsession(env, fileName, reuseFirstSource) {
}

AMRAudioFileServerMediaSubsession
::~AMRAudioFileServerMediaSubsession() {
}

FramedSource* AMRAudioFileServerMediaSubsession
::createNewStreamSource(unsigned /*clientSessionId*/, unsigned& estBitrate) {
  estBitrate = 10; // kbps, estimate

  return AMRAudioFileSource::createNew(envir(), fFileName);
}

RTPSink* AMRAudioFileServerMediaSubsession
::createNewRTPSink(Groupsock* rtpGroupsock,
		   unsigned char rtpPayloadTypeIfDynamic,
		   FramedSource* inputSource) {
  AMRAudioFileSource* amrSource = (AMRAudioFileSource*)inputSource;
  return AMRAudioRTPSink::createNew(envir(), rtpGroupsock,
				    rtpPayloadTypeIfDynamic,
				    amrSource->isWideband(),
				    amrSource->numChannels());
}