godot/platform/javascript/audio_driver_javascript.h
Fabio Alessandrelli 2024200182 [HTML5] Refactor audio drivers. Implement AudioWorklet w/o threads.
Performances are not great in general, bad on Firefox, on Chrome, well,
it's an improvement compared to the way they broke ScriptProcessorNode.

I'm actually surprised this works, it involves so many allocations, but
there's no way around it when SharedArrayBuffer is not available :(.
2021-09-20 14:53:27 +02:00

162 lines
5.5 KiB
C++

/*************************************************************************/
/* audio_driver_javascript.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). */
/* */
/* 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, */
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/*************************************************************************/
#ifndef AUDIO_DRIVER_JAVASCRIPT_H
#define AUDIO_DRIVER_JAVASCRIPT_H
#include "core/os/mutex.h"
#include "core/os/thread.h"
#include "servers/audio_server.h"
#include "godot_audio.h"
class AudioDriverJavaScript : 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;
static void _state_change_callback(int p_state);
static void _latency_update_callback(float p_latency);
static AudioDriverJavaScript *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 float get_latency() override;
virtual int get_mix_rate() const override;
virtual SpeakerMode get_speaker_mode() const override;
virtual Error capture_start() override;
virtual Error capture_stop() override;
static void resume();
AudioDriverJavaScript() {}
};
#ifdef NO_THREADS
class AudioDriverScriptProcessor : public AudioDriverJavaScript {
private:
static void _process_callback();
static AudioDriverScriptProcessor *singleton;
protected:
Error create(int &p_buffer_samples, int p_channels) override;
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 "ScriptProcessor"; }
virtual void lock() override {}
virtual void unlock() override {}
AudioDriverScriptProcessor() { singleton = this; }
};
class AudioDriverWorklet : public AudioDriverJavaScript {
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 {}
AudioDriverWorklet() { singleton = this; }
};
#else
class AudioDriverWorklet : public AudioDriverJavaScript {
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"; }
void lock() override;
void unlock() override;
};
#endif
#endif