text: /*************************************************************************/
  /*  audio_driver_opensl.h                                                */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
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  /* a copy of this software and associated documentation files (the       */
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  /* without limitation the rights to use, copy, modify, merge, publish,   */
  /* distribute, sublicense, and/or sell copies of the Software, and to    */
  /* permit persons to whom the Software is furnished to do so, subject to */
  /* the following conditions:                                             */
  /*                                                                       */
  /* The above copyright notice and this permission notice shall be        */
  /* included in all copies or substantial portions of the Software.       */
  /*                                                                       */
  /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
  /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
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  /*************************************************************************/
  
  #ifndef AUDIO_DRIVER_OPENSL_H
  #define AUDIO_DRIVER_OPENSL_H
  
  #include "core/os/mutex.h"
  #include "servers/audio_server.h"
  
  #include <SLES/OpenSLES.h>
  #include <SLES/OpenSLES_Android.h>
  
  class AudioDriverOpenSL : public AudioDriver {
  	bool active;
  	Mutex mutex;
  
  	enum {
  
  		BUFFER_COUNT = 2
  	};
  
  	bool pause;
  
  	uint32_t buffer_size;
  	int16_t *buffers[BUFFER_COUNT];
  	int32_t *mixdown_buffer;
  	int last_free;
  
  	Vector<int16_t> rec_buffer;
  
  	SLPlayItf playItf;
  	SLRecordItf recordItf;
  	SLObjectItf sl;
  	SLEngineItf EngineItf;
  	SLObjectItf OutputMix;
  	SLVolumeItf volumeItf;
  	SLObjectItf player;
  	SLObjectItf recorder;
  	SLAndroidSimpleBufferQueueItf bufferQueueItf;
  	SLAndroidSimpleBufferQueueItf recordBufferQueueItf;
  	SLDataSource audioSource;
  	SLDataFormat_PCM pcm;
  	SLDataSink audioSink;
  	SLDataLocator_OutputMix locator_outputmix;
  	SLBufferQueueState state;
  
  	static AudioDriverOpenSL *s_ad;
  
  	void _buffer_callback(
  			SLAndroidSimpleBufferQueueItf queueItf);
  
  	static void _buffer_callbacks(
  			SLAndroidSimpleBufferQueueItf queueItf,
  			void *pContext);
  
  	void _record_buffer_callback(
  			SLAndroidSimpleBufferQueueItf queueItf);
  
  	static void _record_buffer_callbacks(
  			SLAndroidSimpleBufferQueueItf queueItf,
  			void *pContext);
  
  	virtual Error capture_init_device();
  
  public:
  	void set_singleton();
  
  	virtual const char *get_name() const;
  
  	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();
  
  	virtual void set_pause(bool p_pause);
  
  	virtual Error capture_start();
  	virtual Error capture_stop();
  
  	AudioDriverOpenSL();
  };
  
  #endif // AUDIO_DRIVER_ANDROID_H
  