adtsaudiofileservermediasubsession.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 AAC audio file in ADTS format
// Implementation

#include "ADTSAudioFileServerMediaSubsession.hh"
#include "ADTSAudioFileSource.hh"
#include "MPEG4GenericRTPSink.hh"

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

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

ADTSAudioFileServerMediaSubsession
::~ADTSAudioFileServerMediaSubsession() {
}

FramedSource* ADTSAudioFileServerMediaSubsession
::createNewStreamSource(unsigned /*clientSessionId*/, unsigned& estBitrate) {
  estBitrate = 96; // kbps, estimate

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

RTPSink* ADTSAudioFileServerMediaSubsession
::createNewRTPSink(Groupsock* rtpGroupsock,
		   unsigned char rtpPayloadTypeIfDynamic,
		   FramedSource* inputSource) {
  ADTSAudioFileSource* adtsSource = (ADTSAudioFileSource*)inputSource;
  return MPEG4GenericRTPSink::createNew(envir(), rtpGroupsock,
					rtpPayloadTypeIfDynamic,
					adtsSource->samplingFrequency(),
					"audio", "AAC-hbr", adtsSource->configStr(),
					adtsSource->numChannels());
}