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/*
Copyright (C) 2013-2021 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/>.
*/
/** @file src/lib/audio_content.h
* @brief AudioContent and AudioContentProperty classes.
*/
#ifndef DCPOMATIC_AUDIO_CONTENT_H
#define DCPOMATIC_AUDIO_CONTENT_H
#include "audio_mapping.h"
#include "audio_stream.h"
#include "content_part.h"
#include "named_channel.h"
/** @class AudioContentProperty
* @brief Names for properties of AudioContent.
*/
class AudioContentProperty
{
public:
static int const STREAMS;
static int const GAIN;
static int const DELAY;
static int const FADE_IN;
static int const FADE_OUT;
static int const USE_SAME_FADES_AS_VIDEO;
};
class AudioContent : public ContentPart
{
public:
explicit AudioContent (Content* parent);
AudioContent (Content* parent, std::vector<std::shared_ptr<Content>>);
AudioContent (Content* parent, cxml::ConstNodePtr);
void as_xml (xmlpp::Node *) const;
std::string technical_summary () const;
void take_settings_from (std::shared_ptr<const AudioContent> c);
AudioMapping mapping () const;
void set_mapping (AudioMapping);
int resampled_frame_rate (std::shared_ptr<const Film> film) const;
std::vector<NamedChannel> channel_names () const;
/** Set gain in dB */
void set_gain (double);
/** Set delay in milliseconds (positive moves audio later) */
void set_delay (int);
double gain () const {
boost::mutex::scoped_lock lm (_mutex);
return _gain;
}
int delay () const {
boost::mutex::scoped_lock lm (_mutex);
return _delay;
}
dcpomatic::ContentTime fade_in () const;
dcpomatic::ContentTime fade_out () const;
void set_fade_in (dcpomatic::ContentTime time);
void set_fade_out (dcpomatic::ContentTime time);
void set_use_same_fades_as_video (bool s);
std::string processing_description (std::shared_ptr<const Film> film) const;
std::vector<AudioStreamPtr> streams () const {
boost::mutex::scoped_lock lm (_mutex);
return _streams;
}
void add_stream (AudioStreamPtr stream);
void set_stream (AudioStreamPtr stream);
AudioStreamPtr stream () const;
void add_properties (std::shared_ptr<const Film> film, std::list<UserProperty> &) const;
void modify_position (std::shared_ptr<const Film> film, dcpomatic::DCPTime& pos) const;
void modify_trim_start(std::shared_ptr<const Film> film, dcpomatic::ContentTime& pos) const;
/** @param frame frame within the whole (untrimmed) content.
* @param frame_rate The frame rate of the audio (it may have been resampled).
* @return a fade coefficient for @ref length samples starting at an offset @frame within
* the content, or an empty vector if the given section has no fade.
*/
std::vector<float> fade (AudioStreamPtr stream, Frame frame, Frame length, int frame_rate) const;
static std::shared_ptr<AudioContent> from_xml (Content* parent, cxml::ConstNodePtr, int version);
private:
/** Gain to apply to audio in dB */
double _gain = 0;
/** Delay to apply to audio (positive moves audio later) in milliseconds */
int _delay = 0;
dcpomatic::ContentTime _fade_in;
dcpomatic::ContentTime _fade_out;
bool _use_same_fades_as_video = false;
std::vector<AudioStreamPtr> _streams;
};
#endif
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