virtualx-engine/platform/osx/audio_driver_osx.h

/*************************************************************************/
/*  audio_driver_osx.h                                                   */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
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#ifdef OSX_ENABLED

#ifndef AUDIO_DRIVER_OSX_H
#define AUDIO_DRIVER_OSX_H

#include "servers/audio_server.h"

#include <AudioUnit/AudioUnit.h>
#include <CoreAudio/AudioHardware.h>

class AudioDriverOSX : public AudioDriver {

	AudioComponentInstance audio_unit;
	AudioObjectPropertyAddress outputDeviceAddress;
	bool active;
	Mutex *mutex;

	int channels;
	int32_t *samples_in;
	int buffer_frames;

	static OSStatus output_callback(void *inRefCon,
			AudioUnitRenderActionFlags *ioActionFlags,
			const AudioTimeStamp *inTimeStamp,
			UInt32 inBusNumber, UInt32 inNumberFrames,
			AudioBufferList *ioData);

	Error initDevice();
	Error finishDevice();

public:
	const char *get_name() const {
		return "AudioUnit";
	};

	virtual Error init();
	virtual void start();
	virtual int get_mix_rate() const;
	virtual SpeakerMode get_speaker_mode() const;
	virtual void lock();
	virtual void unlock();
	virtual void finish();

	bool try_lock();
	Error reopen();

	AudioDriverOSX();
	~AudioDriverOSX();
};

#endif

#endif