X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fdecoder.h;h=6646b0e76acc66b14edb78d698bd9c48412e07c4;hb=3828baf56467224f5d44049bf1e7a7ed11f43a05;hp=30b7dd41f26666bd60672f18da6894c52a4d70ed;hpb=f89ef49deefe91e2b1972b54ee07bfc22a22f303;p=dcpomatic.git diff --git a/src/lib/decoder.h b/src/lib/decoder.h index 30b7dd41f..2a3b56c63 100644 --- a/src/lib/decoder.h +++ b/src/lib/decoder.h @@ -1,141 +1,69 @@ /* - Copyright (C) 2012 Carl Hetherington + Copyright (C) 2012-2015 Carl Hetherington - 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 . */ /** @file src/decoder.h - * @brief Parent class for decoders of content. + * @brief Decoder class. */ -#ifndef DVDOMATIC_DECODER_H -#define DVDOMATIC_DECODER_H +#ifndef DCPOMATIC_DECODER_H +#define DCPOMATIC_DECODER_H -#include -#include -#include -#include -#include -#include "util.h" -#include "stream.h" +#include "types.h" +#include "dcpomatic_time.h" +#include -class Job; -class Options; -class Image; -class Log; -class DelayLine; -class TimedSubtitle; -class Subtitle; -class Film; -class FilterGraph; +class Decoded; +class VideoDecoder; +class AudioDecoder; +class SubtitleDecoder; /** @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, boost::shared_ptr, Job *); - virtual ~Decoder (); - - /* Methods to query our input video */ - - /** @return video frames per second, or 0 if unknown */ - virtual float frames_per_second () const = 0; - /** @return native size in pixels */ - virtual Size native_size () const = 0; - /** @return number of audio channels */ - virtual int audio_channels () const = 0; - /** @return audio sampling rate in Hz */ - virtual int audio_sample_rate () const = 0; - /** @return format of audio samples */ - virtual AVSampleFormat audio_sample_format () const = 0; - virtual int64_t audio_channel_layout () const = 0; - virtual bool has_subtitles () const = 0; - - virtual int time_base_numerator () const = 0; - virtual int time_base_denominator () const = 0; - virtual int sample_aspect_ratio_numerator () const = 0; - virtual int sample_aspect_ratio_denominator () const = 0; - - void process_begin (); - virtual bool pass () = 0; - void process_end (); - void go (); - - SourceFrame video_frame () const { - return _video_frame; - } - - virtual std::vector audio_streams () const { - return std::vector (); - } - - virtual std::vector subtitle_streams () const { - return std::vector (); - } - - /** Emitted when a video frame is ready. - * First parameter is the frame within the source. - * Second parameter is its index within the content. - * Third parameter is either 0 or a subtitle that should be on this frame. + virtual ~Decoder () {} + + boost::shared_ptr video; + boost::shared_ptr audio; + boost::shared_ptr subtitle; + + enum PassReason { + PASS_REASON_VIDEO, + PASS_REASON_AUDIO, + PASS_REASON_SUBTITLE + }; + + /** 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. */ - boost::signals2::signal, SourceFrame, boost::shared_ptr)> Video; - - /** Emitted when some audio data is ready */ - boost::signals2::signal, int64_t)> Audio; - -protected: - - virtual PixelFormat pixel_format () const = 0; - - void process_video (AVFrame *); - void process_audio (boost::shared_ptr); - void process_subtitle (boost::shared_ptr); - void repeat_last_video (); - - int bytes_per_audio_sample () const; - - /** our Film */ - boost::shared_ptr _film; - /** our options */ - boost::shared_ptr _opt; - /** associated Job, or 0 */ - Job* _job; - -private: - void emit_video (boost::shared_ptr, boost::shared_ptr); - void emit_audio (boost::shared_ptr); - - SourceFrame _video_frame; - int64_t _audio_frame; - - std::list > _filter_graphs; - - DelayLine* _delay_line; - int _delay_in_frames; - - boost::shared_ptr _timed_subtitle; + virtual void seek (ContentTime time, bool accurate) = 0; - boost::shared_ptr _last_image; - boost::shared_ptr _last_subtitle; + /** @return true if this decoder has already returned all its data and will give no more */ + virtual bool pass (PassReason, bool accurate) = 0; }; #endif