/**************************************************************************/
/* audio_driver_web.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* 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 */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifndef AUDIO_DRIVER_WEB_H
#define AUDIO_DRIVER_WEB_H
#include "godot_audio.h"
#include "godot_js.h"
#include "core/os/mutex.h"
#include "core/os/thread.h"
#include "servers/audio_server.h"
class AudioDriverWeb : public AudioDriver {
private:
struct AudioContext {
bool inited = false;
float output_latency = 0.0;
int state = -1;
int channel_count = 0;
int mix_rate = 0;
};
static AudioContext audio_context;
float *output_rb = nullptr;
float *input_rb = nullptr;
int buffer_length = 0;
int mix_rate = 0;
int channel_count = 0;
WASM_EXPORT static void _state_change_callback(int p_state);
WASM_EXPORT static void _latency_update_callback(float p_latency);
WASM_EXPORT static void _sample_playback_finished_callback(const char *p_playback_object_id);
static AudioDriverWeb *singleton;
protected:
void _audio_driver_process(int p_from = 0, int p_samples = 0);
void _audio_driver_capture(int p_from = 0, int p_samples = 0);
float *get_output_rb() const { return output_rb; }
float *get_input_rb() const { return input_rb; }
virtual Error create(int &p_buffer_samples, int p_channels) = 0;
virtual void start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) = 0;
virtual void finish_driver() {}
public:
static bool is_available();
virtual Error init() final;
virtual void start() final;
virtual void finish() final;
virtual int get_mix_rate() const override;
virtual SpeakerMode get_speaker_mode() const override;
virtual float get_latency() override;
virtual Error input_start() override;
virtual Error input_stop() override;
static void resume();
// Samples.
virtual bool is_stream_registered_as_sample(const Ref<AudioStream> &p_stream) const override;
virtual void register_sample(const Ref<AudioSample> &p_sample) override;
virtual void unregister_sample(const Ref<AudioSample> &p_sample) override;
virtual void start_sample_playback(const Ref<AudioSamplePlayback> &p_playback) override;
virtual void stop_sample_playback(const Ref<AudioSamplePlayback> &p_playback) override;
virtual void set_sample_playback_pause(const Ref<AudioSamplePlayback> &p_playback, bool p_paused) override;
virtual bool is_sample_playback_active(const Ref<AudioSamplePlayback> &p_playback) override;
virtual double get_sample_playback_position(const Ref<AudioSamplePlayback> &p_playback) override;
virtual void update_sample_playback_pitch_scale(const Ref<AudioSamplePlayback> &p_playback, float p_pitch_scale = 0.0f) override;
virtual void set_sample_playback_bus_volumes_linear(const Ref<AudioSamplePlayback> &p_playback, const HashMap<StringName, Vector<AudioFrame>> &p_bus_volumes) override;
virtual void set_sample_bus_count(int p_count) override;
virtual void remove_sample_bus(int p_index) override;
virtual void add_sample_bus(int p_at_pos = -1) override;
virtual void move_sample_bus(int p_bus, int p_to_pos) override;
virtual void set_sample_bus_send(int p_bus, const StringName &p_send) override;
virtual void set_sample_bus_volume_db(int p_bus, float p_volume_db) override;
virtual void set_sample_bus_solo(int p_bus, bool p_enable) override;
virtual void set_sample_bus_mute(int p_bus, bool p_enable) override;
AudioDriverWeb() {}
};
#ifdef THREADS_ENABLED
class AudioDriverWorklet : public AudioDriverWeb {
private:
enum {
STATE_LOCK,
STATE_PROCESS,
STATE_SAMPLES_IN,
STATE_SAMPLES_OUT,
STATE_MAX,
};
Mutex mutex;
Thread thread;
bool quit = false;
int32_t state[STATE_MAX] = { 0 };
static void _audio_thread_func(void *p_data);
protected:
virtual Error create(int &p_buffer_size, int p_output_channels) override;
virtual void start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) override;
virtual void finish_driver() override;
public:
virtual const char *get_name() const override {
return "AudioWorklet";
}
virtual void lock() override;
virtual void unlock() override;
};
#else
class AudioDriverWorklet : public AudioDriverWeb {
private:
static void _process_callback(int p_pos, int p_samples);
static void _capture_callback(int p_pos, int p_samples);
static AudioDriverWorklet *singleton;
protected:
virtual Error create(int &p_buffer_size, int p_output_channels) override;
virtual void start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) override;
public:
virtual const char *get_name() const override {
return "AudioWorklet";
}
virtual void lock() override {}
virtual void unlock() override {}
static AudioDriverWorklet *get_singleton() { return singleton; }
AudioDriverWorklet() { singleton = this; }
};
class AudioDriverScriptProcessor : public AudioDriverWeb {
private:
static void _process_callback();
static AudioDriverScriptProcessor *singleton;
protected:
virtual Error create(int &p_buffer_size, int p_output_channels) override;
virtual void start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) override;
virtual void finish_driver() override;
public:
virtual const char *get_name() const override { return "ScriptProcessor"; }
virtual void lock() override {}
virtual void unlock() override {}
static AudioDriverScriptProcessor *get_singleton() { return singleton; }
AudioDriverScriptProcessor() { singleton = this; }
};
#endif // THREADS_ENABLED
#endif // AUDIO_DRIVER_WEB_H
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