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cwoffendencwoffenden
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‎test/webaudio/audioworklet_2x_in_hard_pan.c

Lines changed: 92 additions & 92 deletions
Original file line numberDiff line numberDiff line change
@@ -21,11 +21,11 @@
2121
// Count the mixed frames and return after 375 frames (1 second with the default 128 size)
2222
volatile int audioProcessedCount = 0;
2323
bool playedAndMixed(double time, void* data) {
24-
if (audioProcessedCount >= 375) {
25-
REPORT_RESULT(0);
26-
return false;
27-
}
28-
return true;
24+
if (audioProcessedCount >= 375) {
25+
REPORT_RESULT(0);
26+
return false;
27+
}
28+
return true;
2929
}
3030
#endif
3131

@@ -36,119 +36,119 @@ EMSCRIPTEN_WEBAUDIO_T bassID = 0;
3636
// Creates a MediaElementAudioSourceNode with the supplied URL (which is
3737
// registered as an internal audio object and the ID returned).
3838
EM_JS(EMSCRIPTEN_WEBAUDIO_T, createTrack, (EMSCRIPTEN_WEBAUDIO_T ctxID, const char* url, bool looping), {
39-
var context = emscriptenGetAudioObject(ctxID);
40-
if (context) {
41-
var audio = document.createElement('audio');
42-
audio.src = UTF8ToString(url);
43-
audio.loop = looping;
44-
var track = context.createMediaElementSource(audio);
45-
return emscriptenRegisterAudioObject(track);
46-
}
47-
return 0;
39+
var context = emscriptenGetAudioObject(ctxID);
40+
if (context) {
41+
var audio = document.createElement('audio');
42+
audio.src = UTF8ToString(url);
43+
audio.loop = looping;
44+
var track = context.createMediaElementSource(audio);
45+
return emscriptenRegisterAudioObject(track);
46+
}
47+
return 0;
4848
});
4949

5050
// Toggles the play/pause of a MediaElementAudioSourceNode given its ID
5151
EM_JS(void, toggleTrack, (EMSCRIPTEN_WEBAUDIO_T srcID), {
52-
var source = emscriptenGetAudioObject(srcID);
53-
if (source) {
54-
var audio = source.mediaElement;
55-
if (audio) {
56-
if (audio.paused) {
57-
audio.currentTime = 0;
58-
audio.play();
59-
} else {
60-
audio.pause();
61-
}
62-
}
63-
}
52+
var source = emscriptenGetAudioObject(srcID);
53+
if (source) {
54+
var audio = source.mediaElement;
55+
if (audio) {
56+
if (audio.paused) {
57+
audio.currentTime = 0;
58+
audio.play();
59+
} else {
60+
audio.pause();
61+
}
62+
}
63+
}
6464
});
6565

6666
// Callback to process and copy the audio tracks
6767
bool process(int numInputs, const AudioSampleFrame* inputs, int numOutputs, AudioSampleFrame* outputs, int numParams, const AudioParamFrame* params, void* data) {
6868
#ifdef REPORT_RESULT
69-
audioProcessedCount++;
69+
audioProcessedCount++;
7070
#endif
71-
// Twin mono in, single stereo out
72-
assert(numInputs == 2 && numOutputs == 1);
73-
assert(inputs[0].numberOfChannels == 1 && inputs[1].numberOfChannels == 1);
74-
assert(outputs[0].numberOfChannels == 2);
75-
// All with the same number of samples
76-
assert(inputs[0].samplesPerChannel == inputs[1].samplesPerChannel);
77-
assert(inputs[0].samplesPerChannel == outputs[0].samplesPerChannel);
78-
// Now with all known quantities we can memcpy the data
79-
int samplesPerChannel = inputs[0].samplesPerChannel;
80-
memcpy(outputs[0].data, inputs[0].data, samplesPerChannel * sizeof(float));
81-
memcpy(outputs[0].data + samplesPerChannel, inputs[1].data, samplesPerChannel * sizeof(float));
82-
return true;
71+
// Twin mono in, single stereo out
72+
assert(numInputs == 2 && numOutputs == 1);
73+
assert(inputs[0].numberOfChannels == 1 && inputs[1].numberOfChannels == 1);
74+
assert(outputs[0].numberOfChannels == 2);
75+
// All with the same number of samples
76+
assert(inputs[0].samplesPerChannel == inputs[1].samplesPerChannel);
77+
assert(inputs[0].samplesPerChannel == outputs[0].samplesPerChannel);
78+
// Now with all known quantities we can memcpy the data
79+
int samplesPerChannel = inputs[0].samplesPerChannel;
80+
memcpy(outputs[0].data, inputs[0].data, samplesPerChannel * sizeof(float));
81+
memcpy(outputs[0].data + samplesPerChannel, inputs[1].data, samplesPerChannel * sizeof(float));
82+
return true;
8383
}
8484

8585
// Registered click even to (1) enable audio playback and (2) toggle playing the tracks
8686
bool onClick(int type, const EmscriptenMouseEvent* e, void* data) {
87-
EMSCRIPTEN_WEBAUDIO_T ctx = VOIDP_2_WA(data);
88-
if (emscripten_audio_context_state(ctx) != AUDIO_CONTEXT_STATE_RUNNING) {
89-
printf("Resuming playback\n");
90-
emscripten_resume_audio_context_sync(ctx);
91-
}
92-
printf("Toggling audio playback\n");
93-
toggleTrack(beatID);
87+
EMSCRIPTEN_WEBAUDIO_T ctx = VOIDP_2_WA(data);
88+
if (emscripten_audio_context_state(ctx) != AUDIO_CONTEXT_STATE_RUNNING) {
89+
printf("Resuming playback\n");
90+
emscripten_resume_audio_context_sync(ctx);
91+
}
92+
printf("Toggling audio playback\n");
93+
toggleTrack(beatID);
9494
toggleTrack(bassID);
95-
return false;
95+
return false;
9696
}
9797

9898
// Audio processor created, now register the audio callback
9999
void processorCreated(EMSCRIPTEN_WEBAUDIO_T context, bool success, void* data) {
100-
if (success) {
101-
printf("Audio worklet processor created\n");
102-
printf("Click to toggle audio playback\n");
103-
104-
// Stereo output, two inputs
105-
int outputChannelCounts[2] = { 2 };
106-
EmscriptenAudioWorkletNodeCreateOptions opts = {
107-
.numberOfInputs = 2,
108-
.numberOfOutputs = 1,
109-
.outputChannelCounts = outputChannelCounts
110-
};
111-
EMSCRIPTEN_AUDIO_WORKLET_NODE_T worklet = emscripten_create_wasm_audio_worklet_node(context, "mixer", &opts, &process, NULL);
112-
emscripten_audio_node_connect(worklet, context, 0, 0);
113-
114-
// Create the two mono source nodes and connect them to the two inputs
115-
// Note: we can connect the sources to the same input and it'll get mixed for us, but that's not the point
116-
beatID = createTrack(context, "audio_files/emscripten-beat-mono.mp3", true);
117-
if (beatID) {
118-
emscripten_audio_node_connect(beatID, worklet, 0, 0);
119-
}
120-
bassID = createTrack(context, "audio_files/emscripten-bass-mono.mp3", true);
121-
if (bassID) {
122-
emscripten_audio_node_connect(bassID, worklet, 0, 1);
123-
}
124-
125-
emscripten_set_click_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, WA_2_VOIDP(context), false, &onClick);
126-
100+
if (success) {
101+
printf("Audio worklet processor created\n");
102+
printf("Click to toggle audio playback\n");
103+
104+
// Stereo output, two inputs
105+
int outputChannelCounts[2] = { 2 };
106+
EmscriptenAudioWorkletNodeCreateOptions opts = {
107+
.numberOfInputs = 2,
108+
.numberOfOutputs = 1,
109+
.outputChannelCounts = outputChannelCounts
110+
};
111+
EMSCRIPTEN_AUDIO_WORKLET_NODE_T worklet = emscripten_create_wasm_audio_worklet_node(context, "mixer", &opts, &process, NULL);
112+
emscripten_audio_node_connect(worklet, context, 0, 0);
113+
114+
// Create the two mono source nodes and connect them to the two inputs
115+
// Note: we can connect the sources to the same input and it'll get mixed for us, but that's not the point
116+
beatID = createTrack(context, "audio_files/emscripten-beat-mono.mp3", true);
117+
if (beatID) {
118+
emscripten_audio_node_connect(beatID, worklet, 0, 0);
119+
}
120+
bassID = createTrack(context, "audio_files/emscripten-bass-mono.mp3", true);
121+
if (bassID) {
122+
emscripten_audio_node_connect(bassID, worklet, 0, 1);
123+
}
124+
125+
emscripten_set_click_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, WA_2_VOIDP(context), false, &onClick);
126+
127127
#ifdef REPORT_RESULT
128-
emscripten_set_timeout_loop(&playedAndMixed, 16, NULL);
128+
emscripten_set_timeout_loop(&playedAndMixed, 16, NULL);
129129
#endif
130-
} else {
131-
printf("Audio worklet node creation failed\n");
132-
}
130+
} else {
131+
printf("Audio worklet node creation failed\n");
132+
}
133133
}
134134

135135
// Worklet thread inited, now create the audio processor
136136
void initialised(EMSCRIPTEN_WEBAUDIO_T context, bool success, void* data) {
137-
if (success) {
138-
printf("Audio worklet initialised\n");
139-
140-
WebAudioWorkletProcessorCreateOptions opts = {
141-
.name = "mixer",
142-
};
143-
emscripten_create_wasm_audio_worklet_processor_async(context, &opts, &processorCreated, NULL);
144-
} else {
145-
printf("Audio worklet failed to initialise\n");
146-
}
137+
if (success) {
138+
printf("Audio worklet initialised\n");
139+
140+
WebAudioWorkletProcessorCreateOptions opts = {
141+
.name = "mixer",
142+
};
143+
emscripten_create_wasm_audio_worklet_processor_async(context, &opts, &processorCreated, NULL);
144+
} else {
145+
printf("Audio worklet failed to initialise\n");
146+
}
147147
}
148148

149149
int main() {
150-
static char workletStack[AUDIO_STACK_SIZE];
151-
EMSCRIPTEN_WEBAUDIO_T context = emscripten_create_audio_context(NULL);
152-
emscripten_start_wasm_audio_worklet_thread_async(context, workletStack, sizeof workletStack, &initialised, NULL);
153-
return 0;
150+
static char workletStack[AUDIO_STACK_SIZE];
151+
EMSCRIPTEN_WEBAUDIO_T context = emscripten_create_audio_context(NULL);
152+
emscripten_start_wasm_audio_worklet_thread_async(context, workletStack, sizeof workletStack, &initialised, NULL);
153+
return 0;
154154
}

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