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Diffstat (limited to 'src/lib/external_audio_decoder.cc')
| -rw-r--r-- | src/lib/external_audio_decoder.cc | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/src/lib/external_audio_decoder.cc b/src/lib/external_audio_decoder.cc deleted file mode 100644 index 25c8068b6..000000000 --- a/src/lib/external_audio_decoder.cc +++ /dev/null @@ -1,186 +0,0 @@ -/* - Copyright (C) 2012 Carl Hetherington <cth@carlh.net> - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - -*/ - -#include <iostream> -#include <sndfile.h> -#include "external_audio_decoder.h" -#include "film.h" -#include "exceptions.h" - -using std::vector; -using std::string; -using std::stringstream; -using std::min; -using std::cout; -using boost::shared_ptr; -using boost::optional; - -ExternalAudioDecoder::ExternalAudioDecoder (shared_ptr<Film> f, shared_ptr<const DecodeOptions> o, Job* j) - : Decoder (f, o, j) - , AudioDecoder (f, o, j) -{ - sf_count_t frames; - vector<SNDFILE*> sf = open_files (frames); - close_files (sf); -} - -vector<SNDFILE*> -ExternalAudioDecoder::open_files (sf_count_t & frames) -{ - vector<string> const files = _film->external_audio (); - - int N = 0; - for (size_t i = 0; i < files.size(); ++i) { - if (!files[i].empty()) { - N = i + 1; - } - } - - if (N == 0) { - return vector<SNDFILE*> (); - } - - bool first = true; - frames = 0; - - vector<SNDFILE*> sndfiles; - for (size_t i = 0; i < (size_t) N; ++i) { - if (files[i].empty ()) { - sndfiles.push_back (0); - } else { - SF_INFO info; - SNDFILE* s = sf_open (files[i].c_str(), SFM_READ, &info); - if (!s) { - throw DecodeError ("could not open external audio file for reading"); - } - - if (info.channels != 1) { - throw DecodeError ("external audio files must be mono"); - } - - sndfiles.push_back (s); - - if (first) { - shared_ptr<ExternalAudioStream> st ( - new ExternalAudioStream ( - info.samplerate, av_get_default_channel_layout (N) - ) - ); - - _audio_streams.push_back (st); - _audio_stream = st; - frames = info.frames; - first = false; - } else { - if (info.frames != frames) { - throw DecodeError ("external audio files have differing lengths"); - } - } - } - } - - return sndfiles; -} - -bool -ExternalAudioDecoder::pass () -{ - sf_count_t frames; - vector<SNDFILE*> sndfiles = open_files (frames); - if (sndfiles.empty()) { - return true; - } - - /* Do things in half second blocks as I think there may be limits - to what FFmpeg (and in particular the resampler) can cope with. - */ - sf_count_t const block = _audio_stream->sample_rate() / 2; - - shared_ptr<AudioBuffers> audio (new AudioBuffers (_audio_stream->channels(), block)); - while (frames > 0) { - sf_count_t const this_time = min (block, frames); - for (size_t i = 0; i < sndfiles.size(); ++i) { - if (!sndfiles[i]) { - audio->make_silent (i); - } else { - sf_read_float (sndfiles[i], audio->data(i), block); - } - } - - audio->set_frames (this_time); - Audio (audio); - frames -= this_time; - } - - close_files (sndfiles); - - return true; -} - -void -ExternalAudioDecoder::close_files (vector<SNDFILE*> const & sndfiles) -{ - for (size_t i = 0; i < sndfiles.size(); ++i) { - sf_close (sndfiles[i]); - } -} - -shared_ptr<ExternalAudioStream> -ExternalAudioStream::create () -{ - return shared_ptr<ExternalAudioStream> (new ExternalAudioStream); -} - -shared_ptr<ExternalAudioStream> -ExternalAudioStream::create (string t, optional<int> v) -{ - if (!v) { - /* version < 1; no type in the string, and there's only FFmpeg streams anyway */ - return shared_ptr<ExternalAudioStream> (); - } - - stringstream s (t); - string type; - s >> type; - if (type != "external") { - return shared_ptr<ExternalAudioStream> (); - } - - return shared_ptr<ExternalAudioStream> (new ExternalAudioStream (t, v)); -} - -ExternalAudioStream::ExternalAudioStream (string t, optional<int> v) -{ - assert (v); - - stringstream s (t); - string type; - s >> type >> _sample_rate >> _channel_layout; -} - -ExternalAudioStream::ExternalAudioStream () -{ - -} - -string -ExternalAudioStream::to_string () const -{ - return String::compose ("external %1 %2", _sample_rate, _channel_layout); -} |