0be6d925dc
Which means that reduz' beloved style which we all became used to will now be changed automatically to remove the first empty line. This makes us lean closer to 1TBS (the one true brace style) instead of hybridating it with some Allman-inspired spacing. There's still the case of braces around single-statement blocks that needs to be addressed (but clang-format can't help with that, but clang-tidy may if we agree about it). Part of #33027.
282 lines
8.9 KiB
C++
282 lines
8.9 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) 2007-2020 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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#include "audio_driver_javascript.h"
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#include <emscripten.h>
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AudioDriverJavaScript *AudioDriverJavaScript::singleton = nullptr;
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const char *AudioDriverJavaScript::get_name() const {
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return "JavaScript";
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}
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extern "C" EMSCRIPTEN_KEEPALIVE void audio_driver_js_mix() {
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AudioDriverJavaScript::singleton->mix_to_js();
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}
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extern "C" EMSCRIPTEN_KEEPALIVE void audio_driver_process_capture(float sample) {
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AudioDriverJavaScript::singleton->process_capture(sample);
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}
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void AudioDriverJavaScript::mix_to_js() {
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int channel_count = get_total_channels_by_speaker_mode(get_speaker_mode());
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int sample_count = memarr_len(internal_buffer) / channel_count;
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int32_t *stream_buffer = reinterpret_cast<int32_t *>(internal_buffer);
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audio_server_process(sample_count, stream_buffer);
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for (int i = 0; i < sample_count * channel_count; i++) {
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internal_buffer[i] = float(stream_buffer[i] >> 16) / 32768.f;
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}
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}
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void AudioDriverJavaScript::process_capture(float sample) {
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int32_t sample32 = int32_t(sample * 32768.f) * (1U << 16);
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input_buffer_write(sample32);
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}
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Error AudioDriverJavaScript::init() {
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/* clang-format off */
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_driver_id = EM_ASM_INT({
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return Module.IDHandler.add({
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'context': new (window.AudioContext || window.webkitAudioContext),
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'input': null,
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'stream': null,
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'script': null
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});
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});
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/* clang-format on */
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int channel_count = get_total_channels_by_speaker_mode(get_speaker_mode());
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/* clang-format off */
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buffer_length = EM_ASM_INT({
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var ref = Module.IDHandler.get($0);
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var ctx = ref['context'];
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var CHANNEL_COUNT = $1;
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var channelCount = ctx.destination.channelCount;
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var script = null;
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try {
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// Try letting the browser recommend a buffer length.
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script = ctx.createScriptProcessor(0, 2, channelCount);
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} catch (e) {
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// ...otherwise, default to 4096.
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script = ctx.createScriptProcessor(4096, 2, channelCount);
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}
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script.connect(ctx.destination);
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ref['script'] = script;
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return script.bufferSize;
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}, _driver_id, channel_count);
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/* clang-format on */
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if (!buffer_length) {
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return FAILED;
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}
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if (!internal_buffer || (int)memarr_len(internal_buffer) != buffer_length * channel_count) {
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if (internal_buffer)
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memdelete_arr(internal_buffer);
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internal_buffer = memnew_arr(float, buffer_length *channel_count);
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}
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return internal_buffer ? OK : ERR_OUT_OF_MEMORY;
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}
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void AudioDriverJavaScript::start() {
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/* clang-format off */
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EM_ASM({
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const ref = Module.IDHandler.get($0);
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var INTERNAL_BUFFER_PTR = $1;
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var audioDriverMixFunction = cwrap('audio_driver_js_mix');
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var audioDriverProcessCapture = cwrap('audio_driver_process_capture', null, ['number']);
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ref['script'].onaudioprocess = function(audioProcessingEvent) {
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audioDriverMixFunction();
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var input = audioProcessingEvent.inputBuffer;
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var output = audioProcessingEvent.outputBuffer;
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var internalBuffer = HEAPF32.subarray(
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INTERNAL_BUFFER_PTR / HEAPF32.BYTES_PER_ELEMENT,
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INTERNAL_BUFFER_PTR / HEAPF32.BYTES_PER_ELEMENT + output.length * output.numberOfChannels);
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for (var channel = 0; channel < output.numberOfChannels; channel++) {
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var outputData = output.getChannelData(channel);
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// Loop through samples.
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for (var sample = 0; sample < outputData.length; sample++) {
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outputData[sample] = internalBuffer[sample * output.numberOfChannels + channel];
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}
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}
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if (ref['input']) {
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var inputDataL = input.getChannelData(0);
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var inputDataR = input.getChannelData(1);
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for (var i = 0; i < inputDataL.length; i++) {
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audioDriverProcessCapture(inputDataL[i]);
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audioDriverProcessCapture(inputDataR[i]);
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}
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}
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};
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}, _driver_id, internal_buffer);
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/* clang-format on */
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}
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void AudioDriverJavaScript::resume() {
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/* clang-format off */
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EM_ASM({
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const ref = Module.IDHandler.get($0);
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if (ref && ref['context'] && ref['context'].resume)
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ref['context'].resume();
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}, _driver_id);
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/* clang-format on */
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}
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int AudioDriverJavaScript::get_mix_rate() const {
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/* clang-format off */
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return EM_ASM_INT({
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const ref = Module.IDHandler.get($0);
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return ref && ref['context'] ? ref['context'].sampleRate : 0;
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}, _driver_id);
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/* clang-format on */
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}
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AudioDriver::SpeakerMode AudioDriverJavaScript::get_speaker_mode() const {
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/* clang-format off */
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return get_speaker_mode_by_total_channels(EM_ASM_INT({
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const ref = Module.IDHandler.get($0);
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return ref && ref['context'] ? ref['context'].destination.channelCount : 0;
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}, _driver_id));
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/* clang-format on */
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}
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// No locking, as threads are not supported.
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void AudioDriverJavaScript::lock() {
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}
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void AudioDriverJavaScript::unlock() {
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}
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void AudioDriverJavaScript::finish_async() {
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// Close the context, add the operation to the async_finish list in module.
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int id = _driver_id;
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_driver_id = 0;
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/* clang-format off */
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EM_ASM({
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var ref = Module.IDHandler.get($0);
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Module.async_finish.push(new Promise(function(accept, reject) {
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if (!ref) {
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console.log("Ref not found!", $0, Module.IDHandler);
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setTimeout(accept, 0);
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} else {
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const context = ref['context'];
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// Disconnect script and input.
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ref['script'].disconnect();
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if (ref['input'])
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ref['input'].disconnect();
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ref = null;
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context.close().then(function() {
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accept();
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}).catch(function(e) {
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accept();
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});
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}
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}));
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Module.IDHandler.remove($0);
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}, id);
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/* clang-format on */
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}
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void AudioDriverJavaScript::finish() {
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if (internal_buffer) {
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memdelete_arr(internal_buffer);
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internal_buffer = nullptr;
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}
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}
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Error AudioDriverJavaScript::capture_start() {
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input_buffer_init(buffer_length);
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/* clang-format off */
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EM_ASM({
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function gotMediaInput(stream) {
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var ref = Module.IDHandler.get($0);
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ref['stream'] = stream;
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ref['input'] = ref['context'].createMediaStreamSource(stream);
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ref['input'].connect(ref['script']);
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}
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function gotMediaInputError(e) {
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out(e);
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}
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if (navigator.mediaDevices.getUserMedia) {
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navigator.mediaDevices.getUserMedia({"audio": true}).then(gotMediaInput, gotMediaInputError);
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} else {
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if (!navigator.getUserMedia)
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navigator.getUserMedia = navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
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navigator.getUserMedia({"audio": true}, gotMediaInput, gotMediaInputError);
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}
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}, _driver_id);
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/* clang-format on */
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return OK;
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}
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Error AudioDriverJavaScript::capture_stop() {
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/* clang-format off */
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EM_ASM({
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var ref = Module.IDHandler.get($0);
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if (ref['stream']) {
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const tracks = ref['stream'].getTracks();
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for (var i = 0; i < tracks.length; i++) {
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tracks[i].stop();
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}
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ref['stream'] = null;
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}
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if (ref['input']) {
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ref['input'].disconnect();
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ref['input'] = null;
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}
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}, _driver_id);
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/* clang-format on */
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input_buffer.clear();
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return OK;
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}
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AudioDriverJavaScript::AudioDriverJavaScript() {
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_driver_id = 0;
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internal_buffer = nullptr;
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buffer_length = 0;
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singleton = this;
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}
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