godot/platform/android/audio_driver_opensl.h

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/*  audio_driver_opensl.h                                                 */
/**************************************************************************/
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/*                             GODOT ENGINE                               */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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#pragma once

#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 = false;
	Mutex mutex;

	enum {
		BUFFER_COUNT = 2
	};

	bool pause = false;

	uint32_t buffer_size = 0;
	int16_t *buffers[BUFFER_COUNT] = {};
	int32_t *mixdown_buffer = nullptr;
	int last_free = 0;

	Vector<int16_t> rec_buffer;

	SLPlayItf playItf = nullptr;
	SLRecordItf recordItf = nullptr;
	SLObjectItf sl = nullptr;
	SLEngineItf EngineItf = nullptr;
	SLObjectItf OutputMix = nullptr;
	SLObjectItf player = nullptr;
	SLObjectItf recorder = nullptr;
	SLAndroidSimpleBufferQueueItf bufferQueueItf = nullptr;
	SLAndroidSimpleBufferQueueItf recordBufferQueueItf = nullptr;
	SLDataSource audioSource;
	SLDataFormat_PCM pcm;
	SLDataSink audioSink;
	SLDataLocator_OutputMix locator_outputmix;

	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);

	Error init_input_device();

public:
	virtual const char *get_name() const override {
		return "Android";
	}

	virtual Error init() override;
	virtual void start() override;
	virtual int get_mix_rate() const override;
	virtual SpeakerMode get_speaker_mode() const override;

	virtual void lock() override;
	virtual void unlock() override;
	virtual void finish() override;

	virtual Error input_start() override;
	virtual Error input_stop() override;

	void set_pause(bool p_pause);

	AudioDriverOpenSL();
};