content/media/webaudio/test/test_scriptProcessorNode.html@44a2da4a2ab2
content/media/webaudio/test/test_scriptProcessorNode.html
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
1 <!DOCTYPE HTML>
2 <html>
3 <head>
4 <title>Test ScriptProcessorNode</title>
5 <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
6 <script type="text/javascript" src="webaudio.js"></script>
7 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
8 </head>
9 <body>
10 <pre id="test">
11 <script class="testbody" type="text/javascript">
13 // We do not use our generic graph test framework here because
14 // the testing logic here is sort of complicated, and would
15 // not be easy to map to OfflineAudioContext, as ScriptProcessorNodes
16 // can experience delays.
18 SimpleTest.waitForExplicitFinish();
19 addLoadEvent(function() {
20 var context = new AudioContext();
21 var buffer = null;
23 var sourceSP = context.createScriptProcessor(2048);
24 sourceSP.addEventListener("audioprocess", function(e) {
25 // generate the audio
26 for (var i = 0; i < 2048; ++i) {
27 // Make sure our first sample won't be zero
28 e.outputBuffer.getChannelData(0)[i] = Math.sin(440 * 2 * Math.PI * (i + 1) / context.sampleRate);
29 e.outputBuffer.getChannelData(0)[i] = Math.sin(880 * 2 * Math.PI * (i + 1) / context.sampleRate);
30 }
31 // Remember our generated audio
32 buffer = e.outputBuffer;
34 sourceSP.removeEventListener("audioprocess", arguments.callee);
35 }, false);
37 expectException(function() {
38 context.createScriptProcessor(1);
39 }, DOMException.INDEX_SIZE_ERR);
40 expectException(function() {
41 context.createScriptProcessor(2);
42 }, DOMException.INDEX_SIZE_ERR);
43 expectException(function() {
44 context.createScriptProcessor(128);
45 }, DOMException.INDEX_SIZE_ERR);
46 expectException(function() {
47 context.createScriptProcessor(255);
48 }, DOMException.INDEX_SIZE_ERR);
50 is(sourceSP.channelCount, 2, "script processor node has 2 input channels by default");
51 is(sourceSP.channelCountMode, "explicit", "Correct channelCountMode for the script processor node");
52 is(sourceSP.channelInterpretation, "speakers", "Correct channelCountInterpretation for the script processor node");
54 function findFirstNonZeroSample(buffer) {
55 for (var i = 0; i < buffer.length; ++i) {
56 if (buffer.getChannelData(0)[i] != 0) {
57 return i;
58 }
59 }
60 return buffer.length;
61 }
63 var sp = context.createScriptProcessor(2048);
64 sourceSP.connect(sp);
65 sp.connect(context.destination);
66 var lastPlaybackTime = 0;
67 sp.onaudioprocess = function(e) {
68 isnot(buffer, null, "The audioprocess handler for sourceSP must be run at this point");
69 is(e.target, sp, "Correct event target");
70 ok(e.playbackTime > lastPlaybackTime, "playbackTime correctly set");
71 lastPlaybackTime = e.playbackTime;
72 is(e.inputBuffer.numberOfChannels, 2, "Correct number of channels for the input buffer");
73 is(e.inputBuffer.length, 2048, "Correct length for the input buffer");
74 is(e.inputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the input buffer");
75 is(e.outputBuffer.numberOfChannels, 2, "Correct number of channels for the output buffer");
76 is(e.outputBuffer.length, 2048, "Correct length for the output buffer");
77 is(e.outputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the output buffer");
79 // Because of the initial latency added by the second script processor node,
80 // we will never see any generated audio frames in the first callback.
81 var emptyBuffer = context.createBuffer(1, 2048, context.sampleRate);
82 compareChannels(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
83 compareChannels(e.inputBuffer.getChannelData(1), emptyBuffer.getChannelData(0));
84 compareChannels(e.outputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
85 compareChannels(e.outputBuffer.getChannelData(1), emptyBuffer.getChannelData(0));
87 sp.onaudioprocess = function(e) {
88 is(e.target, sp, "Correct event target");
89 ok(e.playbackTime > lastPlaybackTime, "playbackTime correctly set");
90 lastPlaybackTime = e.playbackTime;
91 is(e.inputBuffer.numberOfChannels, 2, "Correct number of channels for the input buffer");
92 is(e.inputBuffer.length, 2048, "Correct length for the input buffer");
93 is(e.inputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the input buffer");
94 is(e.outputBuffer.numberOfChannels, 2, "Correct number of channels for the output buffer");
95 is(e.outputBuffer.length, 2048, "Correct length for the output buffer");
96 is(e.outputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the output buffer");
98 var firstNonZero = findFirstNonZeroSample(e.inputBuffer);
99 ok(firstNonZero <= 2048, "First non-zero sample within range");
101 compareChannels(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0), firstNonZero);
102 compareChannels(e.inputBuffer.getChannelData(1), emptyBuffer.getChannelData(0), firstNonZero);
103 compareChannels(e.inputBuffer.getChannelData(0), buffer.getChannelData(0), 2048 - firstNonZero, firstNonZero, 0);
104 compareChannels(e.inputBuffer.getChannelData(1), buffer.getChannelData(1), 2048 - firstNonZero, firstNonZero, 0);
105 compareChannels(e.outputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
106 compareChannels(e.outputBuffer.getChannelData(1), emptyBuffer.getChannelData(0));
108 if (firstNonZero == 0) {
109 // If we did not experience any delays, the test is done!
110 sp.onaudioprocess = null;
112 SimpleTest.finish();
113 } else if (firstNonZero != 2048) {
114 // In case we just saw a zero buffer this time, wait one more round
115 sp.onaudioprocess = function(e) {
116 is(e.target, sp, "Correct event target");
117 ok(e.playbackTime > lastPlaybackTime, "playbackTime correctly set");
118 lastPlaybackTime = e.playbackTime;
119 is(e.inputBuffer.numberOfChannels, 2, "Correct number of channels for the input buffer");
120 is(e.inputBuffer.length, 2048, "Correct length for the input buffer");
121 is(e.inputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the input buffer");
122 is(e.outputBuffer.numberOfChannels, 2, "Correct number of channels for the output buffer");
123 is(e.outputBuffer.length, 2048, "Correct length for the output buffer");
124 is(e.outputBuffer.sampleRate, context.sampleRate, "Correct sample rate for the output buffer");
126 compareChannels(e.inputBuffer.getChannelData(0), buffer.getChannelData(0), firstNonZero, 0, 2048 - firstNonZero);
127 compareChannels(e.inputBuffer.getChannelData(1), buffer.getChannelData(1), firstNonZero, 0, 2048 - firstNonZero);
128 compareChannels(e.inputBuffer.getChannelData(0), emptyBuffer.getChannelData(0), undefined, firstNonZero);
129 compareChannels(e.inputBuffer.getChannelData(1), emptyBuffer.getChannelData(0), undefined, firstNonZero);
130 compareChannels(e.outputBuffer.getChannelData(0), emptyBuffer.getChannelData(0));
131 compareChannels(e.outputBuffer.getChannelData(1), emptyBuffer.getChannelData(0));
133 sp.onaudioprocess = null;
135 SimpleTest.finish();
136 };
137 }
138 };
139 };
140 });
142 </script>
143 </pre>
144 </body>
145 </html>
