1 /**********
2 This library is free software; you can redistribute it and/or modify it under
3 the terms of the GNU Lesser General Public License as published by the
4 Free Software Foundation; either version 3 of the License, or (at your
5 option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
6 
7 This library is distributed in the hope that it will be useful, but WITHOUT
8 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
9 FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for
10 more details.
11 
12 You should have received a copy of the GNU Lesser General Public License
13 along with this library; if not, write to the Free Software Foundation, Inc.,
14 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
15 **********/
16 // "liveMedia"
17 // Copyright (c) 1996-2020 Live Networks, Inc.  All rights reserved.
18 // RTP sink for AC3 audio
19 // C++ header
20 
21 #ifndef _AC3_AUDIO_RTP_SINK_HH
22 #define _AC3_AUDIO_RTP_SINK_HH
23 
24 #ifndef _AUDIO_RTP_SINK_HH
25 #include "AudioRTPSink.hh"
26 #endif
27 
28 class AC3AudioRTPSink: public AudioRTPSink {
29 public:
30   static AC3AudioRTPSink* createNew(UsageEnvironment& env,
31 				    Groupsock* RTPgs,
32 				    u_int8_t rtpPayloadFormat,
33 				    u_int32_t rtpTimestampFrequency);
34 
35 protected:
36   AC3AudioRTPSink(UsageEnvironment& env, Groupsock* RTPgs,
37 		  u_int8_t rtpPayloadFormat,
38 		  u_int32_t rtpTimestampFrequency);
39 	// called only by createNew()
40 
41   virtual ~AC3AudioRTPSink();
42 
43 private: // redefined virtual functions:
44   virtual Boolean frameCanAppearAfterPacketStart(unsigned char const* frameStart,
45 						 unsigned numBytesInFrame) const;
46   virtual void doSpecialFrameHandling(unsigned fragmentationOffset,
47                                       unsigned char* frameStart,
48                                       unsigned numBytesInFrame,
49                                       struct timeval framePresentationTime,
50                                       unsigned numRemainingBytes);
51   virtual unsigned specialHeaderSize() const;
52 
53 private:
54   unsigned char fTotNumFragmentsUsed; // used only if a frame gets fragmented across multiple packets
55 };
56 
57 #endif
58