122 lines
5.1 KiB
C++
Executable File
122 lines
5.1 KiB
C++
Executable File
/**********
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This library is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License as published by the
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Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
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This library is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this library; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**********/
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// "liveMedia"
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// Copyright (c) 1996-2016 Live Networks, Inc. All rights reserved.
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// A server demultiplexor for a Matroska file
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// Implementation
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#include "MatroskaFileServerDemux.hh"
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#include "MP3AudioMatroskaFileServerMediaSubsession.hh"
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#include "MatroskaFileServerMediaSubsession.hh"
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void MatroskaFileServerDemux
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::createNew(UsageEnvironment& env, char const* fileName,
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onCreationFunc* onCreation, void* onCreationClientData,
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char const* preferredLanguage) {
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(void)new MatroskaFileServerDemux(env, fileName,
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onCreation, onCreationClientData,
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preferredLanguage);
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}
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ServerMediaSubsession* MatroskaFileServerDemux::newServerMediaSubsession() {
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unsigned dummyResultTrackNumber;
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return newServerMediaSubsession(dummyResultTrackNumber);
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}
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ServerMediaSubsession* MatroskaFileServerDemux
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::newServerMediaSubsession(unsigned& resultTrackNumber) {
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ServerMediaSubsession* result;
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resultTrackNumber = 0;
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for (result = NULL; result == NULL && fNextTrackTypeToCheck != MATROSKA_TRACK_TYPE_OTHER; fNextTrackTypeToCheck <<= 1) {
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if (fNextTrackTypeToCheck == MATROSKA_TRACK_TYPE_VIDEO) resultTrackNumber = fOurMatroskaFile->chosenVideoTrackNumber();
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else if (fNextTrackTypeToCheck == MATROSKA_TRACK_TYPE_AUDIO) resultTrackNumber = fOurMatroskaFile->chosenAudioTrackNumber();
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else if (fNextTrackTypeToCheck == MATROSKA_TRACK_TYPE_SUBTITLE) resultTrackNumber = fOurMatroskaFile->chosenSubtitleTrackNumber();
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result = newServerMediaSubsessionByTrackNumber(resultTrackNumber);
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}
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return result;
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}
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ServerMediaSubsession* MatroskaFileServerDemux
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::newServerMediaSubsessionByTrackNumber(unsigned trackNumber) {
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MatroskaTrack* track = fOurMatroskaFile->lookup(trackNumber);
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if (track == NULL) return NULL;
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// Use the track's "codecID" string to figure out which "ServerMediaSubsession" subclass to use:
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ServerMediaSubsession* result = NULL;
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if (strcmp(track->mimeType, "audio/MPEG") == 0) {
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result = MP3AudioMatroskaFileServerMediaSubsession::createNew(*this, track);
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} else {
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result = MatroskaFileServerMediaSubsession::createNew(*this, track);
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}
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if (result != NULL) {
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#ifdef DEBUG
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fprintf(stderr, "Created 'ServerMediaSubsession' object for track #%d: %s (%s)\n", track->trackNumber, track->codecID, track->mimeType);
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#endif
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}
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return result;
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}
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FramedSource* MatroskaFileServerDemux::newDemuxedTrack(unsigned clientSessionId, unsigned trackNumber) {
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MatroskaDemux* demuxToUse = NULL;
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if (clientSessionId != 0 && clientSessionId == fLastClientSessionId) {
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demuxToUse = fLastCreatedDemux; // use the same demultiplexor as before
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// Note: This code relies upon the fact that the creation of streams for different
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// client sessions do not overlap - so all demuxed tracks are created for one "MatroskaDemux" at a time.
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// Also, the "clientSessionId != 0" test is a hack, because 'session 0' is special; its audio and video streams
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// are created and destroyed one-at-a-time, rather than both streams being
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// created, and then (later) both streams being destroyed (as is the case
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// for other ('real') session ids). Because of this, a separate demultiplexor is used for each 'session 0' track.
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}
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if (demuxToUse == NULL) demuxToUse = fOurMatroskaFile->newDemux();
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fLastClientSessionId = clientSessionId;
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fLastCreatedDemux = demuxToUse;
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return demuxToUse->newDemuxedTrackByTrackNumber(trackNumber);
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}
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MatroskaFileServerDemux
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::MatroskaFileServerDemux(UsageEnvironment& env, char const* fileName,
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onCreationFunc* onCreation, void* onCreationClientData,
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char const* preferredLanguage)
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: Medium(env),
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fFileName(fileName), fOnCreation(onCreation), fOnCreationClientData(onCreationClientData),
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fNextTrackTypeToCheck(0x1), fLastClientSessionId(0), fLastCreatedDemux(NULL) {
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MatroskaFile::createNew(env, fileName, onMatroskaFileCreation, this, preferredLanguage);
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}
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MatroskaFileServerDemux::~MatroskaFileServerDemux() {
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Medium::close(fOurMatroskaFile);
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}
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void MatroskaFileServerDemux::onMatroskaFileCreation(MatroskaFile* newFile, void* clientData) {
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((MatroskaFileServerDemux*)clientData)->onMatroskaFileCreation(newFile);
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}
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void MatroskaFileServerDemux::onMatroskaFileCreation(MatroskaFile* newFile) {
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fOurMatroskaFile = newFile;
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// Now, call our own creation notification function:
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if (fOnCreation != NULL) (*fOnCreation)(this, fOnCreationClientData);
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}
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