/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2014 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
#ifndef DCPOMATIC_AUDIO_DECODER_H
#define DCPOMATIC_AUDIO_DECODER_H
-#include "audio_source.h"
#include "decoder.h"
-extern "C" {
-#include <libswresample/swresample.h>
-}
+#include "content.h"
+#include "audio_content.h"
+#include "content_audio.h"
-class AudioContent;
+class AudioBuffers;
+class Resampler;
/** @class AudioDecoder.
* @brief Parent class for audio decoders.
*/
-class AudioDecoder : public AudioSource, public virtual Decoder
+class AudioDecoder : public virtual Decoder
{
public:
- AudioDecoder (boost::shared_ptr<const Film>, boost::shared_ptr<const AudioContent>);
- ~AudioDecoder ();
+ AudioDecoder (boost::shared_ptr<const AudioContent>);
+
+ boost::shared_ptr<const AudioContent> audio_content () const {
+ return _audio_content;
+ }
- void emit_audio (boost::shared_ptr<const AudioBuffers>, Time);
+ /** 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:
+
+ void seek (ContentTime time, bool accurate);
+ void audio (boost::shared_ptr<const AudioBuffers>, ContentTime);
+ void flush ();
-private:
boost::shared_ptr<const AudioContent> _audio_content;
- SwrContext* _swr_context;
+ boost::shared_ptr<Resampler> _resampler;
+ boost::optional<AudioFrame> _audio_position;
+ /** Currently-available decoded audio data */
+ ContentAudio _decoded_audio;
};
#endif