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/*
Copyright (C) 2012 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.
*/
/** @file src/lib/stream.h
* @brief Representations of audio and subtitle streams.
*
* Some content may have multiple `streams' of audio and/or subtitles; perhaps
* for multiple languages, or for stereo / surround mixes. These classes represent
* those streams, and know about their details.
*/
#ifndef DVDOMATIC_STREAM_H
#define DVDOMATIC_STREAM_H
#include <stdint.h>
#include <boost/shared_ptr.hpp>
#include <boost/optional.hpp>
extern "C" {
#include <libavutil/audioconvert.h>
}
/** @class Stream
* @brief Parent class for streams.
*/
class Stream
{
public:
virtual ~Stream () {}
virtual std::string to_string () const = 0;
};
/** @class AudioStream
* @brief A stream of audio data.
*/
struct AudioStream : public Stream
{
public:
AudioStream (int r, int64_t l)
: _sample_rate (r)
, _channel_layout (l)
{}
/* Only used for backwards compatibility for state file version < 1 */
void set_sample_rate (int s) {
_sample_rate = s;
}
int channels () const {
return av_get_channel_layout_nb_channels (_channel_layout);
}
int sample_rate () const {
return _sample_rate;
}
int64_t channel_layout () const {
return _channel_layout;
}
protected:
AudioStream ()
: _sample_rate (0)
, _channel_layout (0)
{}
int _sample_rate;
int64_t _channel_layout;
};
/** @class SubtitleStream
* @brief A stream of subtitle data.
*/
class SubtitleStream : public Stream
{
public:
SubtitleStream (std::string n, int i)
: _name (n)
, _id (i)
{}
std::string to_string () const;
std::string name () const {
return _name;
}
int id () const {
return _id;
}
static boost::shared_ptr<SubtitleStream> create (std::string t, boost::optional<int> v);
private:
friend class stream_test;
SubtitleStream (std::string t, boost::optional<int> v);
std::string _name;
int _id;
};
boost::shared_ptr<AudioStream> audio_stream_factory (std::string t, boost::optional<int> version);
boost::shared_ptr<SubtitleStream> subtitle_stream_factory (std::string t, boost::optional<int> version);
#endif
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