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AudioDriverJavascript uses IDHandler. 

This makes closure compiler happy, avoiding globals and potentially
undefined variables.
This commit is contained in:
Fabio Alessandrelli 2020-03-11 11:32:45 +01:00
parent f0c1e68500
commit bd04ede5ad
2 changed files with 54 additions and 40 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
platform/javascript/audio_driver_javascript.cpp
View File

@ -69,31 +69,37 @@ void AudioDriverJavaScript::process_capture(float sample) {
Error AudioDriverJavaScript::init() {
/* clang-format off */
EM_ASM({
_audioDriver_audioContext = new (window.AudioContext || window.webkitAudioContext);
_audioDriver_audioInput = null;
_audioDriver_inputStream = null;
_audioDriver_scriptNode = null;
_driver_id = EM_ASM_INT({
return Module.IDHandler.add({
'context': new (window.AudioContext || window.webkitAudioContext),
'input': null,
'stream': null,
'script': null
});
});
/* clang-format on */
int channel_count = get_total_channels_by_speaker_mode(get_speaker_mode());
/* clang-format off */
buffer_length = EM_ASM_INT({
var CHANNEL_COUNT = $0;
var ref = Module.IDHandler.get($0);
var ctx = ref['context'];
var CHANNEL_COUNT = $1;
var channelCount = _audioDriver_audioContext.destination.channelCount;
var channelCount = ctx.destination.channelCount;
var script = null;
try {
// Try letting the browser recommend a buffer length.
_audioDriver_scriptNode = _audioDriver_audioContext.createScriptProcessor(0, 2, channelCount);
script = ctx.createScriptProcessor(0, 2, channelCount);
} catch (e) {
// ...otherwise, default to 4096.
_audioDriver_scriptNode = _audioDriver_audioContext.createScriptProcessor(4096, 2, channelCount);
script = ctx.createScriptProcessor(4096, 2, channelCount);
}
_audioDriver_scriptNode.connect(_audioDriver_audioContext.destination);
script.connect(ctx.destination);
ref['script'] = script;
return _audioDriver_scriptNode.bufferSize;
}, channel_count);
return script.bufferSize;
}, _driver_id, channel_count);
/* clang-format on */
if (!buffer_length) {
return FAILED;
@ -112,11 +118,12 @@ void AudioDriverJavaScript::start() {
/* clang-format off */
EM_ASM({
var INTERNAL_BUFFER_PTR = $0;
const ref = Module.IDHandler.get($0);
var INTERNAL_BUFFER_PTR = $1;
var audioDriverMixFunction = cwrap('audio_driver_js_mix');
var audioDriverProcessCapture = cwrap('audio_driver_process_capture', null, ['number']);
_audioDriver_scriptNode.onaudioprocess = function(audioProcessingEvent) {
ref['script'].onaudioprocess = function(audioProcessingEvent) {
audioDriverMixFunction();
var input = audioProcessingEvent.inputBuffer;
@ -133,7 +140,7 @@ void AudioDriverJavaScript::start() {
}
}
if (_audioDriver_audioInput) {
if (ref['input']) {
var inputDataL = input.getChannelData(0);
var inputDataR = input.getChannelData(1);
for (var i = 0; i < inputDataL.length; i++) {
@ -142,34 +149,37 @@ void AudioDriverJavaScript::start() {
}
}
};
}, internal_buffer);
}, _driver_id, internal_buffer);
/* clang-format on */
}
void AudioDriverJavaScript::resume() {
/* clang-format off */
EM_ASM({
if (_audioDriver_audioContext.resume)
_audioDriver_audioContext.resume();
});
const ref = Module.IDHandler.get($0);
if (ref && ref['context'] && ref['context'].resume)
ref['context'].resume();
}, _driver_id);
/* clang-format on */
}
int AudioDriverJavaScript::get_mix_rate() const {
/* clang-format off */
return EM_ASM_INT_V({
return _audioDriver_audioContext.sampleRate;
});
return EM_ASM_INT({
const ref = Module.IDHandler.get($0);
return ref && ref['context'] ? ref['context'].sampleRate : 0;
}, _driver_id);
/* clang-format on */
}
AudioDriver::SpeakerMode AudioDriverJavaScript::get_speaker_mode() const {
/* clang-format off */
return get_speaker_mode_by_total_channels(EM_ASM_INT_V({
return _audioDriver_audioContext.destination.channelCount;
}));
return get_speaker_mode_by_total_channels(EM_ASM_INT({
const ref = Module.IDHandler.get($0);
return ref && ref['context'] ? ref['context'].destination.channelCount : 0;
}, _driver_id));
/* clang-format on */
}
@ -184,16 +194,15 @@ void AudioDriverJavaScript::finish() {
/* clang-format off */
EM_ASM({
_audioDriver_audioContext = null;
_audioDriver_audioInput = null;
_audioDriver_scriptNode = null;
});
Module.IDHandler.remove($0);
}, _driver_id);
/* clang-format on */
if (internal_buffer) {
memdelete_arr(internal_buffer);
internal_buffer = NULL;
}
_driver_id = 0;
}
Error AudioDriverJavaScript::capture_start() {
@ -203,9 +212,10 @@ Error AudioDriverJavaScript::capture_start() {
/* clang-format off */
EM_ASM({
function gotMediaInput(stream) {
_audioDriver_inputStream = stream;
_audioDriver_audioInput = _audioDriver_audioContext.createMediaStreamSource(stream);
_audioDriver_audioInput.connect(_audioDriver_scriptNode);
var ref = Module.IDHandler.get($0);
ref['stream'] = stream;
ref['input'] = ref['context'].createMediaStreamSource(stream);
ref['input'].connect(ref['script']);
}
function gotMediaInputError(e) {
@ -219,7 +229,7 @@ Error AudioDriverJavaScript::capture_start() {
navigator.getUserMedia = navigator.webkitGetUserMedia || navigator.mozGetUserMedia;
navigator.getUserMedia({"audio": true}, gotMediaInput, gotMediaInputError);
}
});
}, _driver_id);
/* clang-format on */
return OK;
@ -229,20 +239,21 @@ Error AudioDriverJavaScript::capture_stop() {
/* clang-format off */
EM_ASM({
if (_audioDriver_inputStream) {
const tracks = _audioDriver_inputStream.getTracks();
var ref = Module.IDHandler.get($0);
if (ref['stream']) {
const tracks = ref['stream'].getTracks();
for (var i = 0; i < tracks.length; i++) {
tracks[i].stop();
}
_audioDriver_inputStream = null;
ref['stream'] = null;
}
if (_audioDriver_audioInput) {
_audioDriver_audioInput.disconnect();
_audioDriver_audioInput = null;
if (ref['input']) {
ref['input'].disconnect();
ref['input'] = null;
}
});
}, _driver_id);
/* clang-format on */
input_buffer.clear();
@ -252,7 +263,9 @@ Error AudioDriverJavaScript::capture_stop() {
AudioDriverJavaScript::AudioDriverJavaScript() {
_driver_id = 0;
internal_buffer = NULL;
buffer_length = 0;
singleton = this;
}

1
platform/javascript/audio_driver_javascript.h
View File

@ -37,6 +37,7 @@ class AudioDriverJavaScript : public AudioDriver {
float *internal_buffer;
int _driver_id;
int buffer_length;
public: