Add basic windowed-sinc audio filters.

[dcpomatic.git] / src / lib / audio_decoder.h

diff --git a/src/lib/audio_decoder.h b/src/lib/audio_decoder.h
index f9948f5973eff4126416d1a506a9695a76f455cd..045efc00207758d01cb56fce7996d685f1a1b458 100644 (file)
--- a/src/lib/audio_decoder.h
+++ b/src/lib/audio_decoder.h
@@ -1,28 +1,74 @@
-#ifndef DVDOMATIC_AUDIO_DECODER_H
-#define DVDOMATIC_AUDIO_DECODER_H
+/*
+    Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
 
-#include "audio_source.h"
-#include "stream.h"
-#include "decoder.h"
+    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.
 
-class AudioDecoder : public AudioSource, public virtual Decoder
-{
-public:
-       AudioDecoder (boost::shared_ptr<Film>, boost::shared_ptr<const Options>, Job *);
+    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.
 
-       virtual void set_audio_stream (boost::optional<AudioStream>);
+    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.
 
-       boost::optional<AudioStream> audio_stream () const {
-               return _audio_stream;
-       }
+*/
 
-       std::vector<AudioStream> audio_streams () const {
-               return _audio_streams;
+/** @file src/lib/audio_decoder.h
+ *  @brief Parent class for audio decoders.
+ */
+
+#ifndef DCPOMATIC_AUDIO_DECODER_H
+#define DCPOMATIC_AUDIO_DECODER_H
+
+#include "decoder.h"
+#include "content.h"
+#include "audio_content.h"
+#include "content_audio.h"
+
+class AudioBuffers;
+class Resampler;
+
+/** @class AudioDecoder.
+ *  @brief Parent class for audio decoders.
+ */
+class AudioDecoder : public virtual Decoder
+{
+public:
+       AudioDecoder (boost::shared_ptr<const AudioContent>);
+       
+       boost::shared_ptr<const AudioContent> audio_content () const {
+               return _audio_content;
        }
 
+       /** Try to fetch some audio from a specific place in this content.
+        *  @param frame Frame to start from.
+        *  @param length Frames to get.
+        *  @param accurate true to try hard to return frames from exactly `frame', false if we don't mind nearby frames.
+        *  @return Time-stamped audio data which may or may not be from the location (and of the length) requested.
+        */
+       boost::shared_ptr<ContentAudio> get_audio (AudioFrame time, AudioFrame length, bool accurate);
+       
 protected:
-       boost::optional<AudioStream> _audio_stream;
-       std::vector<AudioStream> _audio_streams;
+
+       void seek (ContentTime time, bool accurate);
+       void audio (boost::shared_ptr<const AudioBuffers>, ContentTime);
+       void flush ();
+       void reset_decoded_audio ();
+
+       boost::shared_ptr<const AudioContent> _audio_content;
+       boost::shared_ptr<Resampler> _resampler;
+       boost::shared_ptr<AudioProcessor> _processor;
+       boost::optional<AudioFrame> _audio_position;
+       /** Currently-available decoded audio data */
+       ContentAudio _decoded_audio;
+       /** The time of an accurate seek after which we have not yet received any actual
+           data at the seek time.
+       */
+       boost::optional<ContentTime> _seek_reference;
 };
 
 #endif