live: liveMedia/ADTSAudioFileServerMediaSubsession.cpp Source File

00001 /**********
00002 This library is free software; you can redistribute it and/or modify it under
00003 the terms of the GNU Lesser General Public License as published by the
00004 Free Software Foundation; either version 2.1 of the License, or (at your
00005 option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
00006 
00007 This library is distributed in the hope that it will be useful, but WITHOUT
00008 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00009 FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
00010 more details.
00011 
00012 You should have received a copy of the GNU Lesser General Public License
00013 along with this library; if not, write to the Free Software Foundation, Inc.,
00014 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
00015 **********/
00016 // "liveMedia"
00017 // Copyright (c) 1996-2008 Live Networks, Inc.  All rights reserved.
00018 // A 'ServerMediaSubsession' object that creates new, unicast, "RTPSink"s
00019 // on demand, from an AAC audio file in ADTS format
00020 // Implementation
00021 
00022 #include "ADTSAudioFileServerMediaSubsession.hh"
00023 #include "ADTSAudioFileSource.hh"
00024 #include "MPEG4GenericRTPSink.hh"
00025 
00026 ADTSAudioFileServerMediaSubsession*
00027 ADTSAudioFileServerMediaSubsession::createNew(UsageEnvironment& env,
00028                                              char const* fileName,
00029                                              Boolean reuseFirstSource) {
00030   return new ADTSAudioFileServerMediaSubsession(env, fileName, reuseFirstSource);
00031 }
00032 
00033 ADTSAudioFileServerMediaSubsession
00034 ::ADTSAudioFileServerMediaSubsession(UsageEnvironment& env,
00035                                     char const* fileName, Boolean reuseFirstSource)
00036   : FileServerMediaSubsession(env, fileName, reuseFirstSource) {
00037 }
00038 
00039 ADTSAudioFileServerMediaSubsession
00040 ::~ADTSAudioFileServerMediaSubsession() {
00041 }
00042 
00043 FramedSource* ADTSAudioFileServerMediaSubsession
00044 ::createNewStreamSource(unsigned /*clientSessionId*/, unsigned& estBitrate) {
00045   estBitrate = 96; // kbps, estimate
00046 
00047   return ADTSAudioFileSource::createNew(envir(), fFileName);
00048 }
00049 
00050 RTPSink* ADTSAudioFileServerMediaSubsession
00051 ::createNewRTPSink(Groupsock* rtpGroupsock,
00052                    unsigned char rtpPayloadTypeIfDynamic,
00053                    FramedSource* inputSource) {
00054   ADTSAudioFileSource* adtsSource = (ADTSAudioFileSource*)inputSource;
00055   return MPEG4GenericRTPSink::createNew(envir(), rtpGroupsock,
00056                                         rtpPayloadTypeIfDynamic,
00057                                         adtsSource->samplingFrequency(),
00058                                         "audio", "AAC-hbr", adtsSource->configStr(),
00059                                         adtsSource->numChannels());
00060 }