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 WAV audio file.
20// C++ header
21
22#ifndef _WAV_AUDIO_FILE_SERVER_MEDIA_SUBSESSION_HH
23#define _WAV_AUDIO_FILE_SERVER_MEDIA_SUBSESSION_HH
24
25#ifndef _FILE_SERVER_MEDIA_SUBSESSION_HH
26#include "FileServerMediaSubsession.hh"
27#endif
28
29class WAVAudioFileServerMediaSubsession: public FileServerMediaSubsession{
30public:
31 static WAVAudioFileServerMediaSubsession*
32 createNew(UsageEnvironment& env, char const* fileName, Boolean reuseFirstSource,
33 Boolean convertToULaw = False);
34 // If "convertToULaw" is True, 16-bit audio streams are converted to
35 // 8-bit u-law audio prior to streaming.
36
37protected:
38 WAVAudioFileServerMediaSubsession(UsageEnvironment& env, char const* fileName,
39 Boolean reuseFirstSource, Boolean convertToULaw);
40 // called only by createNew();
41 virtual ~WAVAudioFileServerMediaSubsession();
42
43protected: // redefined virtual functions
44 virtual void seekStreamSource(FramedSource* inputSource, double& seekNPT, double streamDuration, u_int64_t& numBytes);
45 virtual void setStreamSourceScale(FramedSource* inputSource, float scale);
46 virtual void setStreamSourceDuration(FramedSource* inputSource, double streamDuration, u_int64_t& numBytes);
47
48 virtual FramedSource* createNewStreamSource(unsigned clientSessionId,
49 unsigned& estBitrate);
50 virtual RTPSink* createNewRTPSink(Groupsock* rtpGroupsock,
51 unsigned char rtpPayloadTypeIfDynamic,
52 FramedSource* inputSource);
53 virtual void testScaleFactor(float& scale);
54 virtual float duration() const;
55
56protected:
57 Boolean fConvertToULaw;
58
59 // The following parameters of the input stream are set after
60 // "createNewStreamSource" is called:
61 unsigned char fAudioFormat;
62 unsigned char fBitsPerSample;
63 unsigned fSamplingFrequency;
64 unsigned fNumChannels;
65 float fFileDuration;
66};
67
68#endif
69