| // META: global=window |
| // META: script=/common/media.js |
| // META: script=/webcodecs/utils.js |
| |
| var defaultInit = { |
| timestamp: 1234, |
| channels: 2, |
| sampleRate: 8000, |
| frames: 1, |
| }; |
| |
| function testAudioData(useView) { |
| let localData = |
| new SharedArrayBuffer(defaultInit.channels * defaultInit.frames * 4); |
| let view = new Float32Array(localData); |
| view[0] = -1.0; |
| view[1] = 1.0; |
| |
| let audio_data_init = { |
| timestamp: defaultInit.timestamp, |
| data: useView ? view : localData, |
| numberOfFrames: defaultInit.frames, |
| numberOfChannels: defaultInit.channels, |
| sampleRate: defaultInit.sampleRate, |
| format: 'f32-planar', |
| } |
| |
| let data = new AudioData(audio_data_init); |
| |
| let copyDest = new SharedArrayBuffer(data.allocationSize({planeIndex: 0})); |
| let destView = new Float32Array(copyDest); |
| data.copyTo(useView ? destView : copyDest, {planeIndex: 0}); |
| assert_equals(destView[0], -1.0, 'copyDest[0]'); |
| data.copyTo(useView ? destView : copyDest, {planeIndex: 1}); |
| assert_equals(destView[0], 1.0, 'copyDest[1]'); |
| } |
| |
| test(t => { |
| testAudioData(/*useView=*/ false); |
| }, 'Test construction and copyTo() using a SharedArrayBuffer'); |
| |
| test(t => { |
| testAudioData(/*useView=*/ true); |
| }, 'Test construction and copyTo() using a Uint8Array(SharedArrayBuffer)'); |