content/media/webaudio/test/test_mediaStreamAudioSourceNodeResampling.html@44a2da4a2ab2 (annotated)
content/media/webaudio/test/test_mediaStreamAudioSourceNodeResampling.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
| michael@0 | 1 | <!DOCTYPE HTML> |
| michael@0 | 2 | <html> |
| michael@0 | 3 | <meta charset="utf-8"> |
| michael@0 | 4 | <head> |
| michael@0 | 5 | <title>Test MediaStreamAudioSourceNode processing is correct</title> |
| michael@0 | 6 | <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script> |
| michael@0 | 7 | <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" /> |
| michael@0 | 8 | </head> |
| michael@0 | 9 | <body> |
| michael@0 | 10 | <pre id="test"> |
| michael@0 | 11 | <script class="testbody" type="text/javascript"> |
| michael@0 | 12 | SimpleTest.waitForExplicitFinish(); |
| michael@0 | 13 | |
| michael@0 | 14 | function test() { |
| michael@0 | 15 | var audio = new Audio("small-shot.ogg"); |
| michael@0 | 16 | var context = new AudioContext(); |
| michael@0 | 17 | var node = context.createMediaStreamSource(audio.mozCaptureStreamUntilEnded()); |
| michael@0 | 18 | var sp = context.createScriptProcessor(2048, 1); |
| michael@0 | 19 | node.connect(sp); |
| michael@0 | 20 | sp.connect(context.destination); // work around bug 916387 |
| michael@0 | 21 | var expectedMinNonzeroSampleCount; |
| michael@0 | 22 | var expectedMaxNonzeroSampleCount; |
| michael@0 | 23 | var nonzeroSampleCount = 0; |
| michael@0 | 24 | var complete = false; |
| michael@0 | 25 | var iterationCount = 0; |
| michael@0 | 26 | |
| michael@0 | 27 | // This test ensures we receive at least expectedSampleCount nonzero samples |
| michael@0 | 28 | function processSamples(e) { |
| michael@0 | 29 | if (complete) { |
| michael@0 | 30 | return; |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | if (iterationCount == 0) { |
| michael@0 | 34 | // Don't start playing the audio until the AudioContext stuff is connected |
| michael@0 | 35 | // and running. |
| michael@0 | 36 | audio.play(); |
| michael@0 | 37 | } |
| michael@0 | 38 | ++iterationCount; |
| michael@0 | 39 | |
| michael@0 | 40 | var buf = e.inputBuffer.getChannelData(0); |
| michael@0 | 41 | var nonzeroSamplesThisBuffer = 0; |
| michael@0 | 42 | for (var i = 0; i < buf.length; ++i) { |
| michael@0 | 43 | if (buf[i] != 0) { |
| michael@0 | 44 | ++nonzeroSamplesThisBuffer; |
| michael@0 | 45 | } |
| michael@0 | 46 | } |
| michael@0 | 47 | nonzeroSampleCount += nonzeroSamplesThisBuffer; |
| michael@0 | 48 | is(e.inputBuffer.numberOfChannels, 1, |
| michael@0 | 49 | "Checking data channel count (nonzeroSamplesThisBuffer=" + |
| michael@0 | 50 | nonzeroSamplesThisBuffer + ")"); |
| michael@0 | 51 | ok(nonzeroSampleCount <= expectedMaxNonzeroSampleCount, |
| michael@0 | 52 | "Too many nonzero samples (got " + nonzeroSampleCount + ", expected max " + expectedMaxNonzeroSampleCount + ")"); |
| michael@0 | 53 | if (nonzeroSampleCount >= expectedMinNonzeroSampleCount && |
| michael@0 | 54 | nonzeroSamplesThisBuffer == 0) { |
| michael@0 | 55 | ok(true, |
| michael@0 | 56 | "Check received enough nonzero samples (got " + nonzeroSampleCount + ", expected min " + expectedMinNonzeroSampleCount + ")"); |
| michael@0 | 57 | SimpleTest.finish(); |
| michael@0 | 58 | complete = true; |
| michael@0 | 59 | } |
| michael@0 | 60 | } |
| michael@0 | 61 | |
| michael@0 | 62 | audio.oncanplaythrough = function() { |
| michael@0 | 63 | // Use a fuzz factor of 100 to account for samples that just happen to be zero |
| michael@0 | 64 | expectedMinNonzeroSampleCount = Math.floor(audio.duration*context.sampleRate) - 100; |
| michael@0 | 65 | expectedMaxNonzeroSampleCount = Math.floor(audio.duration*context.sampleRate) + 500; |
| michael@0 | 66 | sp.onaudioprocess = processSamples; |
| michael@0 | 67 | }; |
| michael@0 | 68 | } |
| michael@0 | 69 | |
| michael@0 | 70 | SpecialPowers.pushPrefEnv({"set": [["media.preload.default", 2], ["media.preload.auto", 3]]}, test); |
| michael@0 | 71 | |
| michael@0 | 72 | </script> |
| michael@0 | 73 | </pre> |
| michael@0 | 74 | </body> |
| michael@0 | 75 | </html> |
