6d939b72f0
Rewrote AudioDriverJavaScript to support multiple processor nodes. The old (and deprecated) ScriptProcessorNode when threads are not available, and the new AudioWorklet API when threads are enabled. The new implementation uses two ring buffers and a shared state to communicated with the AudioWorklet thread. The audio.worklet.js JavaScript file is always added to the export template, but only really used (and download) in the thread build.
127 lines
4.4 KiB
C++
127 lines
4.4 KiB
C++
/*************************************************************************/
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/* audio_driver_javascript.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef AUDIO_DRIVER_JAVASCRIPT_H
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#define AUDIO_DRIVER_JAVASCRIPT_H
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#include "core/os/mutex.h"
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#include "core/os/thread.h"
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#include "servers/audio_server.h"
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#include "godot_audio.h"
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class AudioDriverJavaScript : public AudioDriver {
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public:
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class AudioNode {
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public:
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virtual int create(int p_buffer_size, int p_output_channels) = 0;
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virtual void start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) = 0;
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virtual void finish() {}
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virtual void lock() {}
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virtual void unlock() {}
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virtual ~AudioNode() {}
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};
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class WorkletNode : public AudioNode {
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private:
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enum {
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STATE_LOCK,
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STATE_PROCESS,
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STATE_SAMPLES_IN,
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STATE_SAMPLES_OUT,
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STATE_MAX,
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};
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Mutex *mutex = nullptr;
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Thread *thread = nullptr;
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bool quit = false;
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int32_t state[STATE_MAX] = { 0 };
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static void _audio_thread_func(void *p_data);
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public:
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int create(int p_buffer_size, int p_output_channels) override;
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void start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) override;
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void finish() override;
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void lock() override;
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void unlock() override;
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};
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class ScriptProcessorNode : public AudioNode {
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private:
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static void _process_callback();
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public:
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int create(int p_buffer_samples, int p_channels) override;
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void start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) override;
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};
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private:
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AudioNode *node = nullptr;
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float *output_rb = nullptr;
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float *input_rb = nullptr;
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int buffer_length = 0;
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int mix_rate = 0;
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int channel_count = 0;
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int state = 0;
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float output_latency = 0.0;
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static void _state_change_callback(int p_state);
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static void _latency_update_callback(float p_latency);
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protected:
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void _audio_driver_process(int p_from = 0, int p_samples = 0);
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void _audio_driver_capture(int p_from = 0, int p_samples = 0);
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public:
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static bool is_available();
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static AudioDriverJavaScript *singleton;
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virtual const char *get_name() const;
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virtual Error init();
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virtual void start();
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void resume();
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virtual float get_latency();
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virtual int get_mix_rate() const;
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virtual SpeakerMode get_speaker_mode() const;
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virtual void lock();
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virtual void unlock();
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virtual void finish();
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virtual Error capture_start();
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virtual Error capture_stop();
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AudioDriverJavaScript();
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};
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#endif
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