liveMedia/MP3AudioMatroskaFileServerMediaSubsession.cpp

/**********
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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.

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**********/
// "liveMedia"
// Copyright (c) 1996-2020 Live Networks, Inc.  All rights reserved.
// A 'ServerMediaSubsession' object that creates new, unicast, "RTPSink"s
// on demand, from an MP3 audio track within a Matroska file.
// (Actually, MPEG-1 or MPEG-2 audio file should also work.)
// Implementation

#include "FileServerMediaSubsession.hh"
#include "MP3AudioMatroskaFileServerMediaSubsession.hh"
#include "MatroskaDemuxedTrack.hh"

MP3AudioMatroskaFileServerMediaSubsession* MP3AudioMatroskaFileServerMediaSubsession
::createNew(MatroskaFileServerDemux& demux, MatroskaTrack* track,
	    Boolean generateADUs, Interleaving* interleaving) {
  return new MP3AudioMatroskaFileServerMediaSubsession(demux, track, generateADUs, interleaving);
}

MP3AudioMatroskaFileServerMediaSubsession
::MP3AudioMatroskaFileServerMediaSubsession(MatroskaFileServerDemux& demux, MatroskaTrack* track,
					    Boolean generateADUs, Interleaving* interleaving)
  : MP3AudioFileServerMediaSubsession(demux.envir(), demux.fileName(), False, generateADUs, interleaving),
    fOurDemux(demux), fTrackNumber(track->trackNumber) {
  fFileDuration = fOurDemux.fileDuration();
}

MP3AudioMatroskaFileServerMediaSubsession::~MP3AudioMatroskaFileServerMediaSubsession() {
}

void MP3AudioMatroskaFileServerMediaSubsession
::seekStreamSource(FramedSource* inputSource, double& seekNPT, double /*streamDuration*/, u_int64_t& /*numBytes*/) {
  FramedSource* sourceMP3Stream;
  ADUFromMP3Source* aduStream;
  getBaseStreams(inputSource, sourceMP3Stream, aduStream);

  if (aduStream != NULL) aduStream->resetInput(); // because we're about to seek within its source
  ((MatroskaDemuxedTrack*)sourceMP3Stream)->seekToTime(seekNPT);
}

FramedSource* MP3AudioMatroskaFileServerMediaSubsession
::createNewStreamSource(unsigned clientSessionId, unsigned& estBitrate) {
  FramedSource* baseMP3Source = fOurDemux.newDemuxedTrack(clientSessionId, fTrackNumber);
  return createNewStreamSourceCommon(baseMP3Source, 0, estBitrate);
}