246334b836
Performances are not great in general, bad on Firefox, on Chrome, well, it could be an improvement. Leave it as a fallback for now, but can be forced via project settings if desired (or custom JavaScript logic via the "args" option). I'm actually surprised this works, it involves so many allocations, but there's no way around it when SharedArrayBuffer is not available :(.
293 lines
9.7 KiB
C++
293 lines
9.7 KiB
C++
/*************************************************************************/
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/* audio_driver_javascript.cpp */
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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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 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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#include "audio_driver_javascript.h"
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#include "core/config/project_settings.h"
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#include <emscripten.h>
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AudioDriverJavaScript::AudioContext AudioDriverJavaScript::audio_context;
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bool AudioDriverJavaScript::is_available() {
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return godot_audio_is_available() != 0;
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}
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void AudioDriverJavaScript::_state_change_callback(int p_state) {
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AudioDriverJavaScript::audio_context.state = p_state;
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}
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void AudioDriverJavaScript::_latency_update_callback(float p_latency) {
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AudioDriverJavaScript::audio_context.output_latency = p_latency;
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}
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void AudioDriverJavaScript::_audio_driver_process(int p_from, int p_samples) {
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int32_t *stream_buffer = reinterpret_cast<int32_t *>(output_rb);
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const int max_samples = memarr_len(output_rb);
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int write_pos = p_from;
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int to_write = p_samples;
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if (to_write == 0) {
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to_write = max_samples;
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}
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// High part
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if (write_pos + to_write > max_samples) {
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const int samples_high = max_samples - write_pos;
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audio_server_process(samples_high / channel_count, &stream_buffer[write_pos]);
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for (int i = write_pos; i < max_samples; i++) {
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output_rb[i] = float(stream_buffer[i] >> 16) / 32768.f;
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}
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to_write -= samples_high;
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write_pos = 0;
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}
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// Leftover
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audio_server_process(to_write / channel_count, &stream_buffer[write_pos]);
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for (int i = write_pos; i < write_pos + to_write; i++) {
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output_rb[i] = float(stream_buffer[i] >> 16) / 32768.f;
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}
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}
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void AudioDriverJavaScript::_audio_driver_capture(int p_from, int p_samples) {
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if (get_input_buffer().size() == 0) {
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return; // Input capture stopped.
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}
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const int max_samples = memarr_len(input_rb);
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int read_pos = p_from;
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int to_read = p_samples;
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if (to_read == 0) {
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to_read = max_samples;
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}
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// High part
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if (read_pos + to_read > max_samples) {
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const int samples_high = max_samples - read_pos;
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for (int i = read_pos; i < max_samples; i++) {
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input_buffer_write(int32_t(input_rb[i] * 32768.f) * (1U << 16));
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}
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to_read -= samples_high;
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read_pos = 0;
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}
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// Leftover
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for (int i = read_pos; i < read_pos + to_read; i++) {
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input_buffer_write(int32_t(input_rb[i] * 32768.f) * (1U << 16));
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}
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}
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Error AudioDriverJavaScript::init() {
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int latency = GLOBAL_GET("audio/driver/output_latency");
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if (!audio_context.inited) {
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audio_context.mix_rate = GLOBAL_GET("audio/driver/mix_rate");
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audio_context.channel_count = godot_audio_init(&audio_context.mix_rate, latency, &_state_change_callback, &_latency_update_callback);
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audio_context.inited = true;
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}
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mix_rate = audio_context.mix_rate;
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channel_count = audio_context.channel_count;
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buffer_length = closest_power_of_2((latency * mix_rate / 1000));
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Error err = create(buffer_length, channel_count);
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if (err != OK) {
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return err;
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}
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if (output_rb) {
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memdelete_arr(output_rb);
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}
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output_rb = memnew_arr(float, buffer_length *channel_count);
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if (!output_rb) {
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return ERR_OUT_OF_MEMORY;
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}
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if (input_rb) {
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memdelete_arr(input_rb);
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}
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input_rb = memnew_arr(float, buffer_length *channel_count);
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if (!input_rb) {
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return ERR_OUT_OF_MEMORY;
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}
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return OK;
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}
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void AudioDriverJavaScript::start() {
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start(output_rb, memarr_len(output_rb), input_rb, memarr_len(input_rb));
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}
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void AudioDriverJavaScript::resume() {
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if (audio_context.state == 0) { // 'suspended'
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godot_audio_resume();
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}
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}
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float AudioDriverJavaScript::get_latency() {
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return audio_context.output_latency + (float(buffer_length) / mix_rate);
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}
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int AudioDriverJavaScript::get_mix_rate() const {
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return mix_rate;
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}
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AudioDriver::SpeakerMode AudioDriverJavaScript::get_speaker_mode() const {
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return get_speaker_mode_by_total_channels(channel_count);
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}
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void AudioDriverJavaScript::finish() {
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finish_driver();
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if (output_rb) {
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memdelete_arr(output_rb);
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output_rb = nullptr;
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}
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if (input_rb) {
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memdelete_arr(input_rb);
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input_rb = nullptr;
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}
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}
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Error AudioDriverJavaScript::capture_start() {
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lock();
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input_buffer_init(buffer_length);
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unlock();
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if (godot_audio_capture_start()) {
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return FAILED;
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}
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return OK;
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}
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Error AudioDriverJavaScript::capture_stop() {
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godot_audio_capture_stop();
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lock();
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input_buffer.clear();
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unlock();
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return OK;
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}
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#ifdef NO_THREADS
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/// ScriptProcessorNode implementation
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AudioDriverScriptProcessor *AudioDriverScriptProcessor::singleton = nullptr;
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void AudioDriverScriptProcessor::_process_callback() {
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AudioDriverScriptProcessor::singleton->_audio_driver_capture();
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AudioDriverScriptProcessor::singleton->_audio_driver_process();
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}
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Error AudioDriverScriptProcessor::create(int &p_buffer_samples, int p_channels) {
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if (!godot_audio_has_script_processor()) {
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return ERR_UNAVAILABLE;
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}
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return (Error)godot_audio_script_create(&p_buffer_samples, p_channels);
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}
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void AudioDriverScriptProcessor::start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) {
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godot_audio_script_start(p_in_buf, p_in_buf_size, p_out_buf, p_out_buf_size, &_process_callback);
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}
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/// AudioWorkletNode implementation (no threads)
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AudioDriverWorklet *AudioDriverWorklet::singleton = nullptr;
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Error AudioDriverWorklet::create(int &p_buffer_size, int p_channels) {
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if (!godot_audio_has_worklet()) {
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return ERR_UNAVAILABLE;
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}
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return (Error)godot_audio_worklet_create(p_channels);
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}
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void AudioDriverWorklet::start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) {
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_audio_driver_process();
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godot_audio_worklet_start_no_threads(p_out_buf, p_out_buf_size, &_process_callback, p_in_buf, p_in_buf_size, &_capture_callback);
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}
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void AudioDriverWorklet::_process_callback(int p_pos, int p_samples) {
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AudioDriverWorklet *driver = AudioDriverWorklet::singleton;
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driver->_audio_driver_process(p_pos, p_samples);
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}
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void AudioDriverWorklet::_capture_callback(int p_pos, int p_samples) {
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AudioDriverWorklet *driver = AudioDriverWorklet::singleton;
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driver->_audio_driver_capture(p_pos, p_samples);
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}
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#else
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/// AudioWorkletNode implementation (threads)
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void AudioDriverWorklet::_audio_thread_func(void *p_data) {
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AudioDriverWorklet *driver = static_cast<AudioDriverWorklet *>(p_data);
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const int out_samples = memarr_len(driver->get_output_rb());
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const int in_samples = memarr_len(driver->get_input_rb());
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int wpos = 0;
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int to_write = out_samples;
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int rpos = 0;
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int to_read = 0;
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int32_t step = 0;
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while (!driver->quit) {
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if (to_read) {
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driver->lock();
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driver->_audio_driver_capture(rpos, to_read);
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godot_audio_worklet_state_add(driver->state, STATE_SAMPLES_IN, -to_read);
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driver->unlock();
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rpos += to_read;
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if (rpos >= in_samples) {
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rpos -= in_samples;
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}
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}
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if (to_write) {
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driver->lock();
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driver->_audio_driver_process(wpos, to_write);
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godot_audio_worklet_state_add(driver->state, STATE_SAMPLES_OUT, to_write);
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driver->unlock();
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wpos += to_write;
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if (wpos >= out_samples) {
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wpos -= out_samples;
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}
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}
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step = godot_audio_worklet_state_wait(driver->state, STATE_PROCESS, step, 1);
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to_write = out_samples - godot_audio_worklet_state_get(driver->state, STATE_SAMPLES_OUT);
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to_read = godot_audio_worklet_state_get(driver->state, STATE_SAMPLES_IN);
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}
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}
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Error AudioDriverWorklet::create(int &p_buffer_size, int p_channels) {
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if (!godot_audio_has_worklet()) {
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return ERR_UNAVAILABLE;
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}
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return (Error)godot_audio_worklet_create(p_channels);
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}
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void AudioDriverWorklet::start(float *p_out_buf, int p_out_buf_size, float *p_in_buf, int p_in_buf_size) {
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godot_audio_worklet_start(p_in_buf, p_in_buf_size, p_out_buf, p_out_buf_size, state);
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thread.start(_audio_thread_func, this);
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}
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void AudioDriverWorklet::lock() {
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mutex.lock();
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}
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void AudioDriverWorklet::unlock() {
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mutex.unlock();
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}
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void AudioDriverWorklet::finish_driver() {
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quit = true; // Ask thread to quit.
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thread.wait_to_finish();
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}
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#endif
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