live: liveMedia/include/AMRAudioRTPSink.hh 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) 1996-2012 Live Networks, Inc.  All rights reserved.
00018 // RTP sink for AMR audio (RFC 3267)
00019 // C++ header
00020 
00021 #ifndef _AMR_AUDIO_RTP_SINK_HH
00022 #define _AMR_AUDIO_RTP_SINK_HH
00023 
00024 #ifndef _AUDIO_RTP_SINK_HH
00025 #include "AudioRTPSink.hh"
00026 #endif
00027 
00028 class AMRAudioRTPSink: public AudioRTPSink {
00029 public:
00030   static AMRAudioRTPSink* createNew(UsageEnvironment& env,
00031                                     Groupsock* RTPgs,
00032                                     unsigned char rtpPayloadFormat,
00033                                     Boolean sourceIsWideband = False,
00034                                     unsigned numChannelsInSource = 1);
00035 
00036   Boolean sourceIsWideband() const { return fSourceIsWideband; }
00037 
00038 protected:
00039   AMRAudioRTPSink(UsageEnvironment& env, Groupsock* RTPgs,
00040                   unsigned char rtpPayloadFormat,
00041                   Boolean sourceIsWideband, unsigned numChannelsInSource);
00042         // called only by createNew()
00043 
00044   virtual ~AMRAudioRTPSink();
00045 
00046 private: // redefined virtual functions:
00047   virtual Boolean sourceIsCompatibleWithUs(MediaSource& source);
00048   virtual void doSpecialFrameHandling(unsigned fragmentationOffset,
00049                                       unsigned char* frameStart,
00050                                       unsigned numBytesInFrame,
00051                                       struct timeval framePresentationTime,
00052                                       unsigned numRemainingBytes);
00053   virtual Boolean
00054   frameCanAppearAfterPacketStart(unsigned char const* frameStart,
00055                                  unsigned numBytesInFrame) const;
00056 
00057   virtual unsigned specialHeaderSize() const;
00058   virtual char const* auxSDPLine();
00059 
00060 private:
00061   Boolean fSourceIsWideband;
00062   char* fFmtpSDPLine;
00063 };
00064 
00065 #endif