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After changing the default visibility to hidden to avoid generating thousands of import/export symbols (browsers have a hard limit of 10k), explicitly setting visibility for "boundary functions" (i.e. wasm callbacks called by JS via pointer) is required to ensure the function can be retrieved via pointer from the function table.
124 lines
4.4 KiB
C++
124 lines
4.4 KiB
C++
/**************************************************************************/
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/* audio_driver_web.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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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_WEB_H
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#define AUDIO_DRIVER_WEB_H
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#include "godot_audio.h"
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#include "godot_js.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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class AudioDriverWeb : public AudioDriver {
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private:
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struct AudioContext {
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bool inited = false;
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float output_latency = 0.0;
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int state = -1;
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int channel_count = 0;
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int mix_rate = 0;
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};
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static AudioContext audio_context;
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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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WASM_EXPORT static void _state_change_callback(int p_state);
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WASM_EXPORT static void _latency_update_callback(float p_latency);
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static AudioDriverWeb *singleton;
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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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float *get_output_rb() const { return output_rb; }
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float *get_input_rb() const { return input_rb; }
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virtual Error create(int &p_buffer_samples, int p_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_driver() {}
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public:
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static bool is_available();
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virtual Error init() final;
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virtual void start() final;
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virtual void finish() final;
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virtual int get_mix_rate() const override;
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virtual SpeakerMode get_speaker_mode() const override;
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virtual float get_latency() override;
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virtual Error input_start() override;
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virtual Error input_stop() override;
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static void resume();
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AudioDriverWeb() {}
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};
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class AudioDriverWorklet : public AudioDriverWeb {
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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;
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Thread thread;
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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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protected:
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virtual Error create(int &p_buffer_size, int p_output_channels) override;
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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) override;
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virtual void finish_driver() override;
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public:
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virtual const char *get_name() const override {
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return "AudioWorklet";
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}
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virtual void lock() override;
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virtual void unlock() override;
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};
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#endif // AUDIO_DRIVER_WEB_H
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