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/**
* @file
* @brief Source file for AudioPlaybackThread class
* @author Duzy Chan <code@duzy.info>
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @ref License
*/
/* LICENSE
*
* Copyright (c) 2008-2019 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPENSHOT_AUDIO_PLAYBACK_THREAD_H
#define OPENSHOT_AUDIO_PLAYBACK_THREAD_H
#include "../ReaderBase.h"
#include "../RendererBase.h"
#include "../AudioReaderSource.h"
#include "../AudioDeviceInfo.h"
#include "../Settings.h"
namespace openshot
{
struct SafeTimeSliceThread : juce::TimeSliceThread
{
SafeTimeSliceThread(const String & s) : juce::TimeSliceThread(s) {}
void run()
{
try {
juce::TimeSliceThread::run();
} catch (const TooManySeeks & e) {
// ...
}
}
};
/**
* @brief Singleton wrapper for AudioDeviceManager (to prevent multiple instances).
*/
class AudioDeviceManagerSingleton {
private:
/// Default constructor (Don't allow user to create an instance of this singleton)
AudioDeviceManagerSingleton(){ initialise_error=""; };
/// Private variable to keep track of singleton instance
static AudioDeviceManagerSingleton * m_pInstance;
public:
/// Error found during JUCE initialise method
std::string initialise_error;
/// List of valid audio device names
std::vector<openshot::AudioDeviceInfo> audio_device_names;
/// Override with no channels and no preferred audio device
static AudioDeviceManagerSingleton * Instance();
/// Public device manager property
AudioDeviceManager audioDeviceManager;
/// Close audio device
void CloseAudioDevice();
};
/**
* @brief The audio playback thread
*/
class AudioPlaybackThread : juce::Thread
{
AudioSourcePlayer player;
AudioTransportSource transport;
MixerAudioSource mixer;
AudioReaderSource *source;
double sampleRate;
int numChannels;
juce::WaitableEvent play;
juce::WaitableEvent played;
int buffer_size;
bool is_playing;
SafeTimeSliceThread time_thread;
/// Constructor
AudioPlaybackThread();
/// Destructor
~AudioPlaybackThread();
/// Set the current thread's reader
void Reader(openshot::ReaderBase *reader);
/// Get the current frame object (which is filling the buffer)
std::shared_ptr<openshot::Frame> getFrame();
/// Get the current frame number being played
int64_t getCurrentFramePosition();
/// Play the audio
void Play();
/// Seek the audio thread
void Seek(int64_t new_position);
/// Stop the audio playback
void Stop();
/// Start thread
void run();
/// Set Speed (The speed and direction to playback a reader (1=normal, 2=fast, 3=faster, -1=rewind, etc...)
void setSpeed(int new_speed) { if (source) source->setSpeed(new_speed); }
/// Get Speed (The speed and direction to playback a reader (1=normal, 2=fast, 3=faster, -1=rewind, etc...)
int getSpeed() const { if (source) return source->getSpeed(); else return 1; }
/// Get Audio Error (if any)
std::string getError()
{
return AudioDeviceManagerSingleton::Instance()->initialise_error;
}
/// Get Audio Device Names (if any)
std::vector<openshot::AudioDeviceInfo> getAudioDeviceNames()
{
return AudioDeviceManagerSingleton::Instance()->audio_device_names;
};
friend class PlayerPrivate;
friend class QtPlayer;
};
}
#endif // OPENSHOT_AUDIO_PLAYBACK_THREAD_H
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