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/*
Copyright (C) 2016-2017 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/>.
*/
#include "video_ring_buffers.h"
#include "audio_ring_buffers.h"
#include "text_ring_buffers.h"
#include "audio_mapping.h"
#include "exception_store.h"
#include <boost/shared_ptr.hpp>
#include <boost/weak_ptr.hpp>
#include <boost/thread.hpp>
#include <boost/thread/condition.hpp>
#include <boost/signals2.hpp>
#include <boost/asio.hpp>
class Player;
class PlayerVideo;
class Butler : public ExceptionStore, public boost::noncopyable
{
public:
Butler (
boost::shared_ptr<Player> player,
AudioMapping map,
int audio_channels,
boost::function<AVPixelFormat (AVPixelFormat)> pixel_format,
bool aligned,
bool fast
);
~Butler ();
void seek (DCPTime position, bool accurate);
enum Error {
NONE,
AGAIN
};
std::pair<boost::shared_ptr<PlayerVideo>, DCPTime> get_video (Error* e = 0);
boost::optional<DCPTime> get_audio (float* out, Frame frames);
boost::optional<TextRingBuffers::Data> get_closed_caption ();
void disable_audio ();
std::pair<size_t, std::string> memory_used () const;
private:
void thread ();
void video (boost::shared_ptr<PlayerVideo> video, DCPTime time);
void audio (boost::shared_ptr<AudioBuffers> audio, DCPTime time, int frame_rate);
void text (PlayerText pt, TextType type, boost::optional<DCPTextTrack> track, DCPTimePeriod period);
bool should_run () const;
void prepare (boost::weak_ptr<PlayerVideo> video) const;
void player_change (ChangeType type, bool frequent);
void seek_unlocked (DCPTime position, bool accurate);
boost::shared_ptr<Player> _player;
boost::thread* _thread;
/** mutex to protect _video, _audio and _closed_caption for when we are clearing them and they all need to be
cleared together without any data being inserted in the interim;
XXX: is this necessary now that all butler output data is timestamped? Perhaps the locked clear-out
is only required if we guarantee that get_video() and get_audio() calls are in sync.
*/
boost::mutex _buffers_mutex;
VideoRingBuffers _video;
AudioRingBuffers _audio;
TextRingBuffers _closed_caption;
boost::thread_group _prepare_pool;
boost::asio::io_service _prepare_service;
boost::shared_ptr<boost::asio::io_service::work> _prepare_work;
/** mutex to protect _pending_seek_position, _pending_seek_acurate, _finished, _died, _stop_thread */
boost::mutex _mutex;
boost::condition _summon;
boost::condition _arrived;
boost::optional<DCPTime> _pending_seek_position;
bool _pending_seek_accurate;
int _suspended;
bool _finished;
bool _died;
bool _stop_thread;
AudioMapping _audio_mapping;
int _audio_channels;
bool _disable_audio;
boost::function<AVPixelFormat (AVPixelFormat)> _pixel_format;
bool _aligned;
bool _fast;
/** If we are waiting to be refilled following a seek, this is the time we were
seeking to.
*/
boost::optional<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;
};
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