Go to the documentation of this file.
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 <>.)
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.
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) 1996-2022 Live Networks, Inc. All rights reserved.
18 // A server demultiplexor for a Matroska file
19 // C++ header
25 #include "ServerMediaSession.hh"
26 #endif
28 #ifndef _MATROSKA_FILE_HH
29 #include "MatroskaFile.hh"
30 #endif
33 public:
34  typedef void (onCreationFunc)(MatroskaFileServerDemux* newDemux, void* clientData);
35  static void createNew(UsageEnvironment& env, char const* fileName,
36  onCreationFunc* onCreation, void* onCreationClientData,
37  char const* preferredLanguage = "eng");
38  // Note: Unlike most "createNew()" functions, this one doesn't return a new object immediately. Instead, because this class
39  // requires file reading (to parse the Matroska 'Track' headers) before a new object can be initialized, the creation of a new
40  // object is signalled by calling - from the event loop - an 'onCreationFunc' that is passed as a parameter to "createNew()".
43  ServerMediaSubsession* newServerMediaSubsession(unsigned& resultTrackNumber);
44  // Returns a new "ServerMediaSubsession" object that represents the next preferred media track
45  // (video, audio, subtitle - in that order) from the file. (Preferred media tracks are based on the file's language preference.)
46  // This function returns NULL when no more media tracks exist.
49  // As above, but creates a new "ServerMediaSubsession" object for a specific track number within the Matroska file.
50  // (You should not call this function more than once with the same track number.)
52  // The following public: member functions are called only by the "ServerMediaSubsession" objects:
55  char const* fileName() const { return fFileName; }
56  float fileDuration() const { return fOurMatroskaFile->fileDuration(); }
58  FramedSource* newDemuxedTrack(unsigned clientSessionId, unsigned trackNumber);
59  // Used by the "ServerMediaSubsession" objects to implement their "createNewStreamSource()" virtual function.
61 private:
63  onCreationFunc* onCreation, void* onCreationClientData,
64  char const* preferredLanguage);
65  // called only by createNew()
68  static void onMatroskaFileCreation(MatroskaFile* newFile, void* clientData);
71  static void onDemuxDeletion(void* clientData, MatroskaDemux* demuxBeingDeleted);
72  void onDemuxDeletion(MatroskaDemux* demuxBeingDeleted);
74 private:
75  char const* fFileName;
80  // Used to implement "newServerMediaSubsession()":
83  // Used to set up demuxing, to implement "newDemuxedTrack()":
86 };
88 #endif
void() onCreationFunc(MatroskaFileServerDemux *newDemux, void *clientData)
virtual ~MatroskaFileServerDemux()
MatroskaFileServerDemux(UsageEnvironment &env, char const *fileName, onCreationFunc *onCreation, void *onCreationClientData, char const *preferredLanguage)
ServerMediaSubsession * newServerMediaSubsession()
ServerMediaSubsession * newServerMediaSubsessionByTrackNumber(unsigned trackNumber)
static void createNew(UsageEnvironment &env, char const *fileName, onCreationFunc *onCreation, void *onCreationClientData, char const *preferredLanguage="eng")
ServerMediaSubsession * newServerMediaSubsession(unsigned &resultTrackNumber)
void onMatroskaFileCreation(MatroskaFile *newFile)
static void onDemuxDeletion(void *clientData, MatroskaDemux *demuxBeingDeleted)
FramedSource * newDemuxedTrack(unsigned clientSessionId, unsigned trackNumber)
static void onMatroskaFileCreation(MatroskaFile *newFile, void *clientData)
void onDemuxDeletion(MatroskaDemux *demuxBeingDeleted)
float fileDuration()
Definition: Media.hh:50