liveMedia/AC3AudioFileServerMediaSubsession.cpp

Go to the documentation of this file.

/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)

This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
more details.

You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
**********/
// "liveMedia"
// Copyright (c) 1996-2013 Live Networks, Inc.  All rights reserved.
// A 'ServerMediaSubsession' object that creates new, unicast, "RTPSink"s
// on demand, from an AC3 audio file.
// Implementation

#include "AC3AudioFileServerMediaSubsession.hh"
#include "ByteStreamFileSource.hh"
#include "AC3AudioStreamFramer.hh"
#include "AC3AudioRTPSink.hh"

AC3AudioFileServerMediaSubsession*
AC3AudioFileServerMediaSubsession::createNew(UsageEnvironment& env,
                                             char const* fileName,
                                             Boolean reuseFirstSource) {
  return new AC3AudioFileServerMediaSubsession(env, fileName, reuseFirstSource);
}

AC3AudioFileServerMediaSubsession
::AC3AudioFileServerMediaSubsession(UsageEnvironment& env,
                                    char const* fileName, Boolean reuseFirstSource)
  : FileServerMediaSubsession(env, fileName, reuseFirstSource) {
}

AC3AudioFileServerMediaSubsession::~AC3AudioFileServerMediaSubsession() {
}

FramedSource* AC3AudioFileServerMediaSubsession
::createNewStreamSource(unsigned /*clientSessionId*/, unsigned& estBitrate) {
  estBitrate = 48; // kbps, estimate

  ByteStreamFileSource* fileSource = ByteStreamFileSource::createNew(envir(), fFileName);
  if (fileSource == NULL) return NULL;

  return AC3AudioStreamFramer::createNew(envir(), fileSource);
}

RTPSink* AC3AudioFileServerMediaSubsession
::createNewRTPSink(Groupsock* rtpGroupsock,
                   unsigned char rtpPayloadTypeIfDynamic,
                   FramedSource* inputSource) {
  AC3AudioStreamFramer* audioSource = (AC3AudioStreamFramer*)inputSource;
  return AC3AudioRTPSink::createNew(envir(), rtpGroupsock,
                                    rtpPayloadTypeIfDynamic,
                                    audioSource->samplingRate());
}

---