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/*
Copyright (C) 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
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,
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.
*/
#include <list>
#include <boost/shared_ptr.hpp>
#include <boost/enable_shared_from_this.hpp>
#include "video_source.h"
#include "audio_source.h"
#include "video_sink.h"
#include "audio_sink.h"
#include "ffmpeg_content.h"
#include "audio_mapping.h"
class Content;
class FFmpegContent;
class FFmpegDecoder;
class ImageMagickContent;
class ImageMagickDecoder;
class SndfileContent;
class SndfileDecoder;
class Job;
class Film;
/** @class Playlist
* @brief A set of content files (video and audio), with knowledge of how they should be arranged into
* a DCP.
*
* This class holds Content objects, and it knows how they should be arranged. At the moment
* the ordering is implicit; video content is placed sequentially, and audio content is taken
* from the video unless any sound-only files are present. If sound-only files exist, they
* are played simultaneously (i.e. they can be split up into multiple files for different channels)
*/
class Playlist
{
public:
Playlist ();
void setup (ContentList);
ContentAudioFrame audio_length () const;
int audio_channels () const;
int audio_frame_rate () const;
bool has_audio () const;
float video_frame_rate () const;
libdcp::Size video_size () const;
ContentVideoFrame video_length () const;
AudioMapping default_audio_mapping () const;
ContentVideoFrame content_length () const;
enum AudioFrom {
AUDIO_FFMPEG,
AUDIO_SNDFILE
};
AudioFrom audio_from () const {
return _audio_from;
}
std::list<boost::shared_ptr<const VideoContent> > video () const {
return _video;
}
std::list<boost::shared_ptr<const AudioContent> > audio () const {
return _audio;
}
std::string audio_digest () const;
std::string video_digest () const;
mutable boost::signals2::signal<void ()> Changed;
mutable boost::signals2::signal<void (boost::weak_ptr<Content>, int)> ContentChanged;
private:
void content_changed (boost::weak_ptr<Content>, int);
/** where we should get our audio from */
AudioFrom _audio_from;
/** all our content which contains video */
std::list<boost::shared_ptr<const VideoContent> > _video;
/** all our content which contains audio. This may contain the same objects
* as _video for FFmpegContent.
*/
std::list<boost::shared_ptr<const AudioContent> > _audio;
std::list<boost::signals2::connection> _content_connections;
};
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