X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_decoder.cc;h=fa9fe9711f2cf91692b1d3d140b7a799900240ed;hb=5a5324ed3a381a86dfe0a6e3932c1d58fdcd596f;hp=32453cc13c974d58218cf5dae9eb4eb6da5047d2;hpb=cab9a1d569396065a6e9eb39386736908564d6b4;p=dcpomatic.git

diff --git a/src/lib/audio_decoder.cc b/src/lib/audio_decoder.cc
index 32453cc13..fa9fe9711 100644
--- a/src/lib/audio_decoder.cc
+++ b/src/lib/audio_decoder.cc
@@ -1,84 +1,105 @@
 /*
-    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic 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,
+    DCP-o-matic 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.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
 #include "audio_decoder.h"
 #include "audio_buffers.h"
-#include "exceptions.h"
-#include "log.h"
-#include "resampler.h"
-#include "util.h"
+#include "audio_decoder_stream.h"
+#include "audio_content.h"
+#include <boost/foreach.hpp>
+#include <boost/make_shared.hpp>
+#include <iostream>
 
 #include "i18n.h"
 
-using std::stringstream;
-using std::list;
-using std::pair;
 using std::cout;
-using boost::optional;
+using std::map;
 using boost::shared_ptr;
+using boost::make_shared;
 
-AudioDecoder::AudioDecoder (shared_ptr<const AudioContent> content)
-	: _audio_content (content)
+AudioDecoder::AudioDecoder (Decoder* parent, shared_ptr<const AudioContent> content, bool fast, shared_ptr<Log> log)
+	: _ignore (false)
+	, _fast (fast)
 {
-	if (content->output_audio_frame_rate() != content->content_audio_frame_rate() && content->audio_channels ()) {
-		_resampler.reset (new Resampler (content->content_audio_frame_rate(), content->output_audio_frame_rate(), content->audio_channels ()));
+	BOOST_FOREACH (AudioStreamPtr i, content->streams ()) {
+		_streams[i] = make_shared<AudioDecoderStream> (content, i, parent, fast, log);
 	}
 }
 
-/** Audio timestamping is made hard by many factors, but the final nail in the coffin is resampling.
- *  We have to assume that we are feeding continuous data into the resampler, and so we get continuous
- *  data out.  Hence we do the timestamping here, post-resampler, just by counting samples.
- *
- *  The time is passed in here so that after a seek we can set up our _audio_position.  The
- *  time is ignored once this has been done.
- */
+ContentAudio
+AudioDecoder::get (AudioStreamPtr stream, Frame frame, Frame length, bool accurate)
+{
+	return _streams[stream]->get (frame, length, accurate);
+}
+
 void
-AudioDecoder::audio (shared_ptr<const AudioBuffers> data, ContentTime time)
+AudioDecoder::give (AudioStreamPtr stream, shared_ptr<const AudioBuffers> data, ContentTime time)
 {
-	if (_resampler) {
-		data = _resampler->run (data);
+	if (_ignore) {
+		return;
 	}
 
-	if (!_audio_position) {
-		_audio_position = time;
+	if (_streams.find (stream) == _streams.end ()) {
+
+		/* This method can be called with an unknown stream during the following sequence:
+		   - Add KDM to some DCP content.
+		   - Content gets re-examined.
+		   - SingleStreamAudioContent::take_from_audio_examiner creates a new stream.
+		   - Some content property change signal is delivered so Player::Changed is emitted.
+		   - Film viewer to re-gets the frame.
+		   - Player calls DCPDecoder pass which calls this method on the new stream.
+
+		   At this point the AudioDecoder does not know about the new stream.
+
+		   Then
+		   - Some other property change signal is delivered which marks the player's pieces invalid.
+		   - Film viewer re-gets again.
+		   - Everything is OK.
+
+		   In this situation it is fine for us to silently drop the audio.
+		*/
+
+		return;
 	}
 
-	_pending.push_back (shared_ptr<DecodedAudio> (new DecodedAudio (_audio_position.get (), data)));
-	_audio_position = _audio_position.get() + ContentTime (data->frames (), _audio_content->output_audio_frame_rate ());
+	_streams[stream]->audio (data, time);
 }
 
 void
 AudioDecoder::flush ()
 {
-	if (!_resampler) {
-		return;
+	for (map<AudioStreamPtr, shared_ptr<AudioDecoderStream> >::const_iterator i = _streams.begin(); i != _streams.end(); ++i) {
+		i->second->flush ();
 	}
+}
 
-	shared_ptr<const AudioBuffers> b = _resampler->flush ();
-	if (b) {
-		_pending.push_back (shared_ptr<DecodedAudio> (new DecodedAudio (_audio_position.get (), b)));
-		_audio_position = _audio_position.get() + ContentTime (b->frames (), _audio_content->output_audio_frame_rate ());
+void
+AudioDecoder::seek (ContentTime t, bool accurate)
+{
+	for (map<AudioStreamPtr, shared_ptr<AudioDecoderStream> >::const_iterator i = _streams.begin(); i != _streams.end(); ++i) {
+		i->second->seek (t, accurate);
 	}
 }
 
+/** Set this decoder never to produce any data */
 void
-AudioDecoder::seek (ContentTime, bool)
+AudioDecoder::set_ignore ()
 {
-	_audio_position.reset ();
+	_ignore = true;
 }