1/**********
2This library is free software; you can redistribute it and/or modify it under
3the terms of the GNU Lesser General Public License as published by the
4Free Software Foundation; either version 3 of the License, or (at your
5option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
6
7This library is distributed in the hope that it will be useful, but WITHOUT
8ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
9FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
10more details.
11
12You should have received a copy of the GNU Lesser General Public License
13along with this library; if not, write to the Free Software Foundation, Inc.,
1451 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15**********/
16// "liveMedia"
17// Copyright (c) 1996-2020 Live Networks, Inc. All rights reserved.
18// MPEG4-GENERIC ("audio", "video", or "application") RTP stream sources
19// C++ header
20
21#ifndef _MPEG4_GENERIC_RTP_SOURCE_HH
22#define _MPEG4_GENERIC_RTP_SOURCE_HH
23
24#ifndef _MULTI_FRAMED_RTP_SOURCE_HH
25#include "MultiFramedRTPSource.hh"
26#endif
27
28class MPEG4GenericRTPSource: public MultiFramedRTPSource {
29public:
30 static MPEG4GenericRTPSource*
31 createNew(UsageEnvironment& env, Groupsock* RTPgs,
32 unsigned char rtpPayloadFormat,
33 unsigned rtpTimestampFrequency,
34 char const* mediumName,
35 char const* mode, unsigned sizeLength, unsigned indexLength,
36 unsigned indexDeltaLength
37 // add other parameters later
38 );
39 // mediumName is "audio", "video", or "application"
40 // it *cannot* be NULL
41
42protected:
43 MPEG4GenericRTPSource(UsageEnvironment& env, Groupsock* RTPgs,
44 unsigned char rtpPayloadFormat,
45 unsigned rtpTimestampFrequency,
46 char const* mediumName,
47 char const* mode,
48 unsigned sizeLength, unsigned indexLength,
49 unsigned indexDeltaLength
50 );
51 // called only by createNew(), or by subclass constructors
52 virtual ~MPEG4GenericRTPSource();
53
54protected:
55 // redefined virtual functions:
56 virtual Boolean processSpecialHeader(BufferedPacket* packet,
57 unsigned& resultSpecialHeaderSize);
58 virtual char const* MIMEtype() const;
59
60private:
61 char* fMIMEType;
62
63 char* fMode;
64 unsigned fSizeLength, fIndexLength, fIndexDeltaLength;
65 unsigned fNumAUHeaders; // in the most recently read packet
66 unsigned fNextAUHeader; // index of the next AU Header to read
67 struct AUHeader* fAUHeaders;
68
69 friend class MPEG4GenericBufferedPacket;
70};
71
72
73
74// A function that looks up the sampling frequency from an
75// "AudioSpecificConfig" string. (0 means 'unknown')
76unsigned samplingFrequencyFromAudioSpecificConfig(char const* configStr);
77
78#endif
79