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 // 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 29 class WAVAudioFileServerMediaSubsession: public FileServerMediaSubsession{ 30 public: 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 37 protected: 38 WAVAudioFileServerMediaSubsession(UsageEnvironment& env, char const* fileName, 39 Boolean reuseFirstSource, Boolean convertToULaw); 40 // called only by createNew(); 41 virtual ~WAVAudioFileServerMediaSubsession(); 42 43 protected: // 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 56 protected: 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