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/*
Copyright (C) 2014-2015 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/>.
*/
/** @file src/lib/audio_processor.h
* @brief AudioProcessor class.
*/
#ifndef DCPOMATIC_AUDIO_PROCESSOR_H
#define DCPOMATIC_AUDIO_PROCESSOR_H
#include <boost/shared_ptr.hpp>
#include <list>
#include <string>
#include <vector>
class AudioBuffers;
class AudioMapping;
/** @class AudioProcessor
* @brief A parent class for processors of audio data.
*
* These are used to process data before it goes into the DCP, for things like
* stereo -> 5.1 upmixing.
*/
class AudioProcessor
{
public:
virtual ~AudioProcessor () {}
/** @return User-visible (translated) name */
virtual std::string name () const = 0;
/** @return An internal identifier */
virtual std::string id () const = 0;
/** @return Number of output channels */
virtual int out_channels () const = 0;
/** @return A clone of this AudioProcessor for operation at the specified sampling rate */
virtual boost::shared_ptr<AudioProcessor> clone (int sampling_rate) const = 0;
/** Process some data, returning the processed result truncated or padded to `channels' */
virtual boost::shared_ptr<AudioBuffers> run (boost::shared_ptr<const AudioBuffers>, int channels) = 0;
virtual void flush () {}
/** Make the supplied audio mapping into a sensible default for this processor */
virtual void make_audio_mapping_default (AudioMapping& mapping) const = 0;
/** @return the user-visible (translated) names of each of our inputs, in order */
virtual std::vector<std::string> input_names () const = 0;
static std::list<AudioProcessor const *> all ();
static std::list<AudioProcessor const *> visible ();
static void setup_audio_processors ();
static AudioProcessor const * from_id (std::string);
private:
static std::list<AudioProcessor const *> _all;
static std::list<AudioProcessor const *> _non_experimental;
};
#endif
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