| <!DOCTYPE html> |
| <html> |
| <head> |
| <title> |
| audiobuffersource-start.html |
| </title> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| <script src="../resources/audit-util.js"></script> |
| <script src="../resources/audit.js"></script> |
| <script src="../resources/audiobuffersource-testing.js"></script> |
| </head> |
| <body> |
| <script id="layout-test-code"> |
| let audit = Audit.createTaskRunner(); |
| |
| // The following test cases assume an AudioBuffer of length 8 whose PCM |
| // data is a linear ramp, 0, 1, 2, 3,... |
| |
| let tests = [ |
| |
| { |
| description: |
| 'start(when): implicitly play whole buffer from beginning to end', |
| offsetFrame: 'none', |
| durationFrames: 'none', |
| renderFrames: 16, |
| playbackRate: 1, |
| expected: [0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 0, 0, 0, 0, 0, 0] |
| }, |
| |
| { |
| description: |
| 'start(when, 0): play whole buffer from beginning to end explicitly giving offset of 0', |
| offsetFrame: 0, |
| durationFrames: 'none', |
| renderFrames: 16, |
| playbackRate: 1, |
| expected: [0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 0, 0, 0, 0, 0, 0] |
| }, |
| |
| { |
| description: |
| 'start(when, 0, 8_frames): play whole buffer from beginning to end explicitly giving offset of 0 and duration of 8 frames', |
| offsetFrame: 0, |
| durationFrames: 8, |
| renderFrames: 16, |
| playbackRate: 1, |
| expected: [0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 0, 0, 0, 0, 0, 0] |
| }, |
| |
| { |
| description: |
| 'start(when, 4_frames): play with explicit non-zero offset', |
| offsetFrame: 4, |
| durationFrames: 'none', |
| renderFrames: 16, |
| playbackRate: 1, |
| expected: [4, 5, 6, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] |
| }, |
| |
| { |
| description: |
| 'start(when, 4_frames, 4_frames): play with explicit non-zero offset and duration', |
| offsetFrame: 4, |
| durationFrames: 4, |
| renderFrames: 16, |
| playbackRate: 1, |
| expected: [4, 5, 6, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] |
| }, |
| |
| { |
| description: |
| 'start(when, 7_frames): play with explicit non-zero offset near end of buffer', |
| offsetFrame: 7, |
| durationFrames: 1, |
| renderFrames: 16, |
| playbackRate: 1, |
| expected: [7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] |
| }, |
| |
| { |
| description: |
| 'start(when, 8_frames): play with explicit offset at end of buffer', |
| offsetFrame: 8, |
| durationFrames: 0, |
| renderFrames: 16, |
| playbackRate: 1, |
| expected: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] |
| }, |
| |
| { |
| description: |
| 'start(when, 9_frames): play with explicit offset past end of buffer', |
| offsetFrame: 8, |
| durationFrames: 0, |
| renderFrames: 16, |
| playbackRate: 1, |
| expected: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] |
| }, |
| |
| // When the duration exceeds the buffer, just play to the end of the |
| // buffer. (This is different from the case when we're looping, which is |
| // tested in loop-comprehensive.) |
| { |
| description: |
| 'start(when, 0, 15_frames): play with whole buffer, with long duration (clipped)', |
| offsetFrame: 0, |
| durationFrames: 15, |
| renderFrames: 16, |
| playbackRate: 1, |
| expected: [0, 1, 2, 3, 4, 5, 6, 7, 0, 0, 0, 0, 0, 0, 0, 0] |
| }, |
| |
| // Enable test when AudioBufferSourceNode hack is fixed: |
| // https://bugs.webkit.org/show_bug.cgi?id=77224 { description: |
| // "start(when, 3_frames, 3_frames): play a middle section with explicit |
| // offset and duration", |
| // offsetFrame: 3, durationFrames: 3, renderFrames: 16, playbackRate: |
| // 1, expected: [4,5,6,7,0,0,0,0,0,0,0,0,0,0,0,0] }, |
| |
| ]; |
| |
| let sampleRate = 44100; |
| let buffer; |
| let bufferFrameLength = 8; |
| let testSpacingFrames = 32; |
| let testSpacingSeconds = testSpacingFrames / sampleRate; |
| let totalRenderLengthFrames = tests.length * testSpacingFrames; |
| |
| function runLoopTest(context, testNumber, test) { |
| let source = context.createBufferSource(); |
| |
| source.buffer = buffer; |
| source.playbackRate.value = test.playbackRate; |
| |
| source.connect(context.destination); |
| |
| // Render each test one after the other, spaced apart by |
| // testSpacingSeconds. |
| let startTime = testNumber * testSpacingSeconds; |
| |
| if (test.offsetFrame == 'none' && test.durationFrames == 'none') { |
| source.start(startTime); |
| } else if (test.durationFrames == 'none') { |
| let offset = test.offsetFrame / context.sampleRate; |
| source.start(startTime, offset); |
| } else { |
| let offset = test.offsetFrame / context.sampleRate; |
| let duration = test.durationFrames / context.sampleRate; |
| source.start(startTime, offset, duration); |
| } |
| } |
| |
| audit.define( |
| 'Tests AudioBufferSourceNode start()', function(task, should) { |
| // Create offline audio context. |
| let context = |
| new OfflineAudioContext(1, totalRenderLengthFrames, sampleRate); |
| buffer = createTestBuffer(context, bufferFrameLength); |
| |
| for (let i = 0; i < tests.length; ++i) |
| runLoopTest(context, i, tests[i]); |
| |
| context.startRendering().then(function(audioBuffer) { |
| checkAllTests(audioBuffer, should); |
| task.done(); |
| }); |
| }); |
| |
| audit.run(); |
| </script> |
| </body> |
| </html> |
