mirror of
https://github.com/ElvishArtisan/rivendell.git
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109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
// rdmp4.cpp
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//
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// Helpers for dealing with MP4 files.
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//
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// (C) Copyright 2014 Christopher Smowton <chris@smowton.net>
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Library General Public License
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// version 2 as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public
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// License along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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//
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#ifdef HAVE_MP4_LIBS
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#include <rdmp4.h>
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#include <string.h>
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#include <dlfcn.h>
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MP4TrackId DLMP4::getMP4AACTrack(MP4FileHandle f)
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{
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uint32_t nTracks = this->MP4GetNumberOfTracks(f, NULL, 0);
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for(uint32_t trackIndex = 0; trackIndex < nTracks; ++trackIndex) {
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MP4TrackId thisTrack = this->MP4FindTrackId(f, trackIndex);
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const char* trackType = this->MP4GetTrackType(f, thisTrack);
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if(trackType && !strcmp(trackType, MP4_AUDIO_TRACK_TYPE)) {
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const char* dataName = this->MP4GetTrackMediaDataName(f, thisTrack);
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// The M4A format is only currently useful for AAC in an M4A container:
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if(dataName &&
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(!strcasecmp(dataName, "mp4a")) &&
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this->MP4GetTrackEsdsObjectTypeId(f, thisTrack) == MP4_MPEG4_AUDIO_TYPE) {
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return thisTrack;
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}
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}
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}
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return MP4_INVALID_TRACK_ID;
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}
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#define check_dlsym(lval, libhandle, symname) \
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*(void**)(&lval) = dlsym(libhandle, symname); \
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if(!lval) return false;
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bool DLMP4::load()
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{
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if(loadSuccess)
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return true;
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neaac_handle = dlopen("libfaad.so",RTLD_LAZY);
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mp4_handle = dlopen("libmp4v2.so",RTLD_LAZY);
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if(!neaac_handle || !mp4_handle)
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return false;
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check_dlsym(this->MP4Read, mp4_handle, "MP4Read");
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check_dlsym(this->MP4GetTrackNumberOfSamples, mp4_handle, "MP4GetTrackNumberOfSamples");
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check_dlsym(this->MP4GetSampleIdFromTime, mp4_handle, "MP4GetSampleIdFromTime");
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check_dlsym(this->MP4GetTrackMaxSampleSize, mp4_handle, "MP4GetTrackMaxSampleSize");
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check_dlsym(this->MP4GetTrackESConfiguration, mp4_handle, "MP4GetTrackESConfiguration");
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check_dlsym(this->MP4ReadSample, mp4_handle, "MP4ReadSample");
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check_dlsym(this->MP4GetTrackBitRate, mp4_handle, "MP4GetTrackBitRate");
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check_dlsym(this->MP4GetTrackAudioChannels, mp4_handle, "MP4GetTrackAudioChannels");
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check_dlsym(this->MP4GetTrackDuration, mp4_handle, "MP4GetTrackDuration");
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check_dlsym(this->MP4ConvertFromTrackDuration, mp4_handle, "MP4ConvertFromTrackDuration");
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check_dlsym(this->MP4GetTrackTimeScale, mp4_handle, "MP4GetTrackTimeScale");
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check_dlsym(this->MP4GetNumberOfTracks, mp4_handle, "MP4GetNumberOfTracks");
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check_dlsym(this->MP4FindTrackId, mp4_handle, "MP4FindTrackId");
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check_dlsym(this->MP4GetTrackType, mp4_handle, "MP4GetTrackType");
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check_dlsym(this->MP4GetTrackMediaDataName, mp4_handle, "MP4GetTrackMediaDataName");
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check_dlsym(this->MP4GetTrackEsdsObjectTypeId, mp4_handle, "MP4GetTrackEsdsObjectTypeId");
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check_dlsym(this->MP4TagsAlloc, mp4_handle, "MP4TagsAlloc");
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check_dlsym(this->MP4TagsFetch, mp4_handle, "MP4TagsFetch");
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check_dlsym(this->MP4TagsFree, mp4_handle, "MP4TagsFree");
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check_dlsym(this->MP4Close, mp4_handle, "MP4Close");
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check_dlsym(this->NeAACDecOpen, neaac_handle, "NeAACDecOpen");
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check_dlsym(this->NeAACDecGetCurrentConfiguration, neaac_handle, "NeAACDecGetCurrentConfiguration");
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check_dlsym(this->NeAACDecSetConfiguration, neaac_handle, "NeAACDecSetConfiguration");
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check_dlsym(this->NeAACDecInit2, neaac_handle, "NeAACDecInit2");
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check_dlsym(this->NeAACDecDecode, neaac_handle, "NeAACDecDecode");
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check_dlsym(this->NeAACDecClose, neaac_handle, "NeAACDecClose");
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loadSuccess = true;
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return true;
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}
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#undef check_dlsym
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#endif // HAVE_MP4_LIBS
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