/*
- Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
class VideoDecoder;
class AudioDecoder;
class SubtitleDecoder;
+class DecoderPart;
/** @class Decoder.
* @brief Parent class for decoders of content.
boost::shared_ptr<AudioDecoder> audio;
boost::shared_ptr<SubtitleDecoder> subtitle;
- enum PassReason {
- PASS_REASON_VIDEO,
- PASS_REASON_AUDIO,
- PASS_REASON_SUBTITLE
- };
-
- /** @return true if this decoder has already returned all its data and will give no more */
- virtual bool pass (PassReason, bool accurate) = 0;
-
- /** Ensure that any future get() calls return data that reflect
- * changes in our content's settings.
+ /** Do some decoding and perhaps emit video, audio or subtitle data.
+ * @return true if this decoder will emit no more data unless a seek() happens.
*/
- virtual void reset () {}
+ virtual bool pass () = 0;
+ virtual void seek (ContentTime time, bool accurate);
- void maybe_seek (boost::optional<ContentTime>& position, ContentTime time, bool accurate);
-
-private:
- /** Seek so that the next pass() will yield the next thing
- * (video/sound frame, subtitle etc.) at or after the requested
- * time. Pass accurate = true to try harder to ensure that, at worst,
- * the next thing we yield comes before `time'. This may entail
- * seeking some way before `time' to be on the safe side.
- * Alternatively, if seeking is 100% accurate for this decoder,
- * it may seek to just the right spot.
- */
- virtual void seek (ContentTime time, bool accurate) = 0;
+ ContentTime position () const;
};
#endif