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// A 'ServerMediaSubsession' object that creates new, unicast, "RTPSink"s
19// on demand, from an MP3 audio file.
20// (Actually, any MPEG-1 or MPEG-2 audio file should work.)
21// C++ header
22
23#ifndef _MP3_AUDIO_FILE_SERVER_MEDIA_SUBSESSION_HH
24#define _MP3_AUDIO_FILE_SERVER_MEDIA_SUBSESSION_HH
25
26#ifndef _FILE_SERVER_MEDIA_SUBSESSION_HH
27#include "FileServerMediaSubsession.hh"
28#endif
29#ifndef _MP3_ADU_INTERLEAVING_HH
30#include "MP3ADUinterleaving.hh"
31#endif
32#ifndef _MP3_ADU_HH
33#include "MP3ADU.hh"
34#endif
35
36class MP3AudioFileServerMediaSubsession: public FileServerMediaSubsession{
37public:
38 static MP3AudioFileServerMediaSubsession*
39 createNew(UsageEnvironment& env, char const* fileName, Boolean reuseFirstSource,
40 Boolean generateADUs, Interleaving* interleaving);
41 // Note: "interleaving" is used only if "generateADUs" is True,
42 // (and a value of NULL means 'no interleaving')
43
44protected:
45 MP3AudioFileServerMediaSubsession(UsageEnvironment& env,
46 char const* fileName, Boolean reuseFirstSource,
47 Boolean generateADUs,
48 Interleaving* interleaving);
49 // called only by createNew();
50 virtual ~MP3AudioFileServerMediaSubsession();
51
52 FramedSource* createNewStreamSourceCommon(FramedSource* baseMP3Source, unsigned mp3NumBytes, unsigned& estBitrate);
53 void getBaseStreams(FramedSource* frontStream,
54 FramedSource*& sourceMP3Stream, ADUFromMP3Source*& aduStream/*if any*/);
55
56protected: // redefined virtual functions
57 virtual void seekStreamSource(FramedSource* inputSource, double& seekNPT, double streamDuration, u_int64_t& numBytes);
58 virtual void setStreamSourceScale(FramedSource* inputSource, float scale);
59 virtual FramedSource* createNewStreamSource(unsigned clientSessionId,
60 unsigned& estBitrate);
61 virtual RTPSink* createNewRTPSink(Groupsock* rtpGroupsock,
62 unsigned char rtpPayloadTypeIfDynamic,
63 FramedSource* inputSource);
64 virtual void testScaleFactor(float& scale);
65 virtual float duration() const;
66
67protected:
68 Boolean fGenerateADUs;
69 Interleaving* fInterleaving;
70 float fFileDuration;
71};
72
73#endif
74