/*
- Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2013 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_DECODER_H
#define DCPOMATIC_DECODER_H
-#include <vector>
-#include <string>
-#include <stdint.h>
#include <boost/shared_ptr.hpp>
-#include <boost/signals2.hpp>
-#include "video_source.h"
-#include "audio_source.h"
-#include "film.h"
+#include <boost/weak_ptr.hpp>
+#include <boost/utility.hpp>
+#include "types.h"
-class Image;
-class Log;
-class DelayLine;
-class TimedSubtitle;
-class Subtitle;
-class FilterGraph;
+class Film;
+class Decoded;
/** @class Decoder.
* @brief Parent class for decoders of content.
- *
- * These classes can be instructed run through their content (by
- * calling ::go), and they emit signals when video or audio data is
- * ready for something else to process.
*/
-class Decoder
+class Decoder : public boost::noncopyable
{
public:
Decoder (boost::shared_ptr<const Film>);
virtual ~Decoder () {}
- virtual bool pass () = 0;
- virtual bool seek (double);
- virtual bool seek_back () {
- return true;
- }
- virtual bool seek_forward () {
- return true;
- }
-
- boost::signals2::signal<void()> OutputChanged;
+ /** Seek so that the next get_*() will yield the next thing
+ * (video/sound frame, subtitle etc.) at or after the requested
+ * time. Pass accurate = true to try harder to get close to
+ * the request.
+ */
+ virtual void seek (ContentTime time, bool accurate);
+
+ boost::shared_ptr<Decoded> peek ();
+ void consume ();
protected:
- boost::shared_ptr<const Film> _film;
-private:
- virtual void film_changed (Film::Property) {}
+ /** Perform one decode pass of the content, which may or may not
+ * result in a complete quantum (Decoded object) of decoded stuff
+ * being made ready.
+ * @return true if the decoder is done (i.e. no more data will be
+ * produced by any future calls to pass() without a seek() first).
+ */
+ virtual bool pass () = 0;
+ virtual void flush () {};
+
+ /** The Film that we are decoding in */
+ boost::weak_ptr<const Film> _film;
- boost::signals2::scoped_connection _film_connection;
+ std::list<boost::shared_ptr<Decoded> > _pending;
};
#endif