1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
#include <emscripten/webaudio.h>
#include <emscripten/threading.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
// Tests that
// - _emscripten_thread_supports_atomics_wait() returns true in a Wasm Audio Worklet.
// - emscripten_futex_wake() does not crash in a Wasm Audio Worklet.
// - emscripten_futex_wait() does not crash in a Wasm Audio Worklet.
// - emscripten_get_now() does not crash in a Wasm Audio Worklet.
int futexLocation = 0;
int testSuccess = 0;
bool ProcessAudio(int numInputs, const AudioSampleFrame *inputs, int numOutputs, AudioSampleFrame *outputs, int numParams, const AudioParamFrame *params, void *userData) {
int supportsAtomicWait = _emscripten_thread_supports_atomics_wait();
printf("supportsAtomicWait: %d\n", supportsAtomicWait);
assert(!supportsAtomicWait);
emscripten_futex_wake(&futexLocation, 1);
printf("%f\n", emscripten_get_now());
emscripten_futex_wait(&futexLocation, 1, /*maxWaitMs=*/2);
testSuccess = 1;
return false;
}
EM_JS(void, InitHtmlUi, (EMSCRIPTEN_WEBAUDIO_T audioContext), {
let startButton = document.createElement('button');
startButton.innerHTML = 'Start playback';
document.body.appendChild(startButton);
audioContext = emscriptenGetAudioObject(audioContext);
startButton.onclick = () => {
audioContext.resume();
};
});
bool PollTestSuccess(double, void *) {
if (testSuccess) {
printf("Test success!\n");
#ifdef REPORT_RESULT
REPORT_RESULT(0);
#endif
return false;
}
return true;
}
void AudioWorkletProcessorCreated(EMSCRIPTEN_WEBAUDIO_T audioContext, bool success, void *userData) {
int outputChannelCounts[1] = { 1 };
EmscriptenAudioWorkletNodeCreateOptions options = { .numberOfInputs = 0, .numberOfOutputs = 1, .outputChannelCounts = outputChannelCounts };
EMSCRIPTEN_AUDIO_WORKLET_NODE_T wasmAudioWorklet = emscripten_create_wasm_audio_worklet_node(audioContext, "noise-generator", &options, &ProcessAudio, 0);
emscripten_audio_node_connect(wasmAudioWorklet, audioContext, 0, 0);
InitHtmlUi(audioContext);
}
void WebAudioWorkletThreadInitialized(EMSCRIPTEN_WEBAUDIO_T audioContext, bool success, void *userData) {
WebAudioWorkletProcessorCreateOptions opts = { .name = "noise-generator" };
emscripten_create_wasm_audio_worklet_processor_async(audioContext, &opts, AudioWorkletProcessorCreated, 0);
}
uint8_t wasmAudioWorkletStack[4096];
int main() {
emscripten_set_timeout_loop(PollTestSuccess, 10, 0);
EMSCRIPTEN_WEBAUDIO_T context = emscripten_create_audio_context(0);
emscripten_start_wasm_audio_worklet_thread_async(context, wasmAudioWorkletStack, sizeof(wasmAudioWorkletStack), WebAudioWorkletThreadInitialized, 0);
}
|
