videoFrame-drawImage-hbd.any.js (1201B)
1 // META: global=window,dedicatedworker 2 // META: script=/webcodecs/utils.js 3 4 test(_ => { 5 let width = 48; 6 let height = 36; 7 let expectedPixel = kSRGBPixel; 8 let canvasOptions = undefined; 9 let imageSetting = undefined; 10 let tolerance = 5; 11 let vfInit = 12 {format: 'I420P10', timestamp: 0, codedWidth: width, codedHeight: height}; 13 let data = new Uint16Array(3 * width * height / 2); 14 let uOffset = width * height; 15 let vOffset = uOffset + width * height / 4; 16 // RGB(50, 100, 150) converted to 8-bit YCbCr using BT.709 YUV matrix, then 17 // shifted to produce approximate 10-bit YUV colors. It would be more accurate 18 // to directly compute 10-bit colors. 19 data.fill(96 << 2, 0, uOffset); 20 data.fill(155 << 2, uOffset, vOffset); 21 data.fill(104 << 2, vOffset); 22 let frame = new VideoFrame(data, vfInit); 23 let canvas = new OffscreenCanvas(width, height); 24 let ctx = canvas.getContext('2d', canvasOptions); 25 ctx.drawImage(frame, 0, 0); 26 testCanvas(ctx, width, height, expectedPixel, imageSetting, 27 (actual, expected) => { 28 assert_approx_equals(actual, expected, tolerance); 29 }); 30 frame.close(); 31 }, 'drawImage with 10-bit YUV VideoFrame');