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/*
Copyright (C) 2016-2021 Carl Hetherington <cth@carlh.net>
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.
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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DCPOMATIC_BUTLER_H
#define DCPOMATIC_BUTLER_H
#include "audio_mapping.h"
#include "audio_ring_buffers.h"
#include "change_signaller.h"
#include "exception_store.h"
#include "io_context.h"
#include "text_ring_buffers.h"
#include "text_type.h"
#include "video_ring_buffers.h"
#include <boost/asio.hpp>
#include <boost/signals2.hpp>
#include <boost/thread.hpp>
#include <boost/thread/condition.hpp>
class Player;
class PlayerVideo;
class Butler : public ExceptionStore
{
public:
enum class Audio
{
ENABLED,
DISABLED
};
Butler(
std::weak_ptr<const Film> film,
Player& player,
AudioMapping map,
int audio_channels,
AVPixelFormat pixel_format,
VideoRange video_range,
Image::Alignment alignment,
bool fast,
bool prepare_only_proxy,
Audio audio
);
~Butler();
Butler(Butler const&) = delete;
Butler& operator=(Butler const&) = delete;
void seek(dcpomatic::DCPTime position, bool accurate);
class Error {
public:
enum class Code {
NONE,
AGAIN,
DIED,
FINISHED
};
Code code = Code::NONE;
std::string message;
std::string summary() const;
};
enum class Behaviour {
BLOCKING,
NON_BLOCKING
};
std::pair<std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime> get_video(Behaviour behaviour, Error* e = nullptr);
boost::optional<dcpomatic::DCPTime> get_audio(Behaviour behaviour, float* out, Frame frames);
boost::optional<TextRingBuffers::Data> get_closed_caption();
std::pair<size_t, std::string> memory_used() const;
private:
void thread();
void video(std::shared_ptr<PlayerVideo> video, dcpomatic::DCPTime time);
void audio(std::shared_ptr<AudioBuffers> audio, dcpomatic::DCPTime time, int frame_rate);
void text(PlayerText pt, TextType type, boost::optional<DCPTextTrack> track, dcpomatic::DCPTimePeriod period);
bool should_run() const;
void prepare(std::weak_ptr<PlayerVideo> video);
void player_change(ChangeType type, int property);
void seek_unlocked(dcpomatic::DCPTime position, bool accurate);
std::weak_ptr<const Film> _film;
Player& _player;
boost::thread _thread;
VideoRingBuffers _video;
AudioRingBuffers _audio;
TextRingBuffers _closed_caption;
boost::thread_group _prepare_pool;
dcpomatic::io_context _prepare_context;
boost::optional<dcpomatic::work_guard> _prepare_work;
/** mutex to protect _pending_seek_position, _pending_seek_accurate, _finished, _died, _stop_thread */
boost::mutex _mutex;
boost::condition _summon;
boost::condition _arrived;
boost::optional<dcpomatic::DCPTime> _pending_seek_position;
bool _pending_seek_accurate;
int _suspended;
bool _finished;
bool _died;
std::string _died_message;
bool _stop_thread;
AudioMapping _audio_mapping;
int _audio_channels;
bool _disable_audio;
AVPixelFormat _pixel_format;
VideoRange _video_range;
Image::Alignment _alignment;
bool _fast;
/** true to ask PlayerVideo::prepare to only prepare the ImageProxy and not also
* the final image. We want to do this when the viewer is intending to call
* PlayerVideo::raw_image() and do the things in PlayerVideo::make_image() itself:
* this is the case for the GLVideoView which can do scale, pixfmt conversion etc.
* in the shader.
*/
bool _prepare_only_proxy = false;
/** If we are waiting to be refilled following a seek, this is the time we were
seeking to.
*/
boost::optional<dcpomatic::DCPTime> _awaiting;
boost::signals2::scoped_connection _player_video_connection;
boost::signals2::scoped_connection _player_audio_connection;
boost::signals2::scoped_connection _player_text_connection;
boost::signals2::scoped_connection _player_change_connection;
};
#endif
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