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/*
* Copyright 2003-2018 The Music Player Daemon Project
* http://www.musicpd.org
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* Functions for dealing with all configured (enabled) audion outputs
* at once.
*
*/
#ifndef OUTPUT_ALL_H
#define OUTPUT_ALL_H
#include "Control.hxx"
#include "MusicChunkPtr.hxx"
#include "player/Outputs.hxx"
#include "AudioFormat.hxx"
#include "ReplayGainMode.hxx"
#include "Chrono.hxx"
#include "util/Compiler.h"
#include <vector>
#include <assert.h>
class MusicPipe;
class EventLoop;
class MixerListener;
class AudioOutputClient;
struct ConfigData;
struct ReplayGainConfig;
class MultipleOutputs final : public PlayerOutputs {
MixerListener &mixer_listener;
std::vector<AudioOutputControl *> outputs;
AudioFormat input_audio_format = AudioFormat::Undefined();
/**
* The #MusicPipe object which feeds all audio outputs. It is
* filled by Play().
*/
std::unique_ptr<MusicPipe> pipe;
/**
* The "elapsed_time" stamp of the most recently finished
* chunk.
*/
SignedSongTime elapsed_time = SignedSongTime::Negative();
public:
/**
* Load audio outputs from the configuration file and
* initialize them.
*/
MultipleOutputs(MixerListener &_mixer_listener) noexcept;
~MultipleOutputs() noexcept;
void Configure(EventLoop &event_loop,
const ConfigData &config,
const ReplayGainConfig &replay_gain_config,
AudioOutputClient &client);
void AddNullOutput(EventLoop &event_loop,
const ReplayGainConfig &replay_gain_config,
AudioOutputClient &client);
/**
* Returns the total number of audio output devices, including
* those which are disabled right now.
*/
gcc_pure
unsigned Size() const noexcept {
return outputs.size();
}
/**
* Returns the "i"th audio output device.
*/
const AudioOutputControl &Get(unsigned i) const noexcept {
assert(i < Size());
return *outputs[i];
}
AudioOutputControl &Get(unsigned i) noexcept {
assert(i < Size());
return *outputs[i];
}
/**
* Returns the audio output device with the specified name.
* Returns nullptr if the name does not exist.
*/
gcc_pure
AudioOutputControl *FindByName(const char *name) noexcept;
void SetReplayGainMode(ReplayGainMode mode) noexcept;
/**
* Returns the average volume of all available mixers (range
* 0..100). Returns -1 if no mixer can be queried.
*/
gcc_pure
int GetVolume() const noexcept;
/**
* Sets the volume on all available mixers.
*
* @param volume the volume (range 0..100)
* @return true on success, false on failure
*/
bool SetVolume(unsigned volume) noexcept;
/**
* Similar to GetVolume(), but gets the volume only for
* software mixers. See #software_mixer_plugin. This
* function fails if no software mixer is configured.
*/
gcc_pure
int GetSoftwareVolume() const noexcept;
/**
* Similar to SetVolume(), but sets the volume only for
* software mixers. See #software_mixer_plugin. This
* function cannot fail, because the underlying software
* mixers cannot fail either.
*/
void SetSoftwareVolume(unsigned volume) noexcept;
private:
/**
* Wait until all (active) outputs have finished the current
* command.
*/
void WaitAll() noexcept;
/**
* Signals all audio outputs which are open.
*/
void AllowPlay() noexcept;
/**
* Opens all output devices which are enabled, but closed.
*
* @return true if there is at least open output device which
* is open
*/
bool Update(bool force) noexcept;
/**
* Has this chunk been consumed by all audio outputs?
*/
bool IsChunkConsumed(const MusicChunk *chunk) const noexcept;
/**
* There's only one chunk left in the pipe (#pipe), and all
* audio outputs have consumed it already. Clear the
* reference.
*/
void ClearTailChunk(const MusicChunk *chunk, bool *locked) noexcept;
/* virtual methods from class PlayerOutputs */
void EnableDisable() override;
void Open(const AudioFormat audio_format) override;
void Close() noexcept override;
void Release() noexcept override;
void Play(MusicChunkPtr chunk) override;
unsigned CheckPipe() noexcept override;
void Pause() noexcept override;
void Drain() noexcept override;
void Cancel() noexcept override;
void SongBorder() noexcept override;
SignedSongTime GetElapsedTime() const noexcept override {
return elapsed_time;
}
};
#endif
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