antosdk-apps/RemoteCamera/build/debug/decoder.js

44 lines
1.1 KiB
JavaScript
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decode = (arr) =>
{
if(!JpegImage)
{
console.error("libjpeg is not available");
return;
}
let raw = new Uint8Array(arr);
let jpeg = new JpegImage();
jpeg.parse(raw);
let data = jpeg.getData(jpeg.width, jpeg.height);
let msg = {
w: jpeg.width,
h: jpeg.height,
pixels: undefined
}
msg.pixels = new Uint8Array(msg.w*msg.h*4);
for(let j = 0; j < msg.h; j++)
{
for(let i = 0; i < msg.w; i++)
{
let index = j*msg.w*4 + i*4;
msg.pixels[index] = data[j*msg.w*3 + i*3];
msg.pixels[index+1] = data[j*msg.w*3 + i*3 + 1];
msg.pixels[index+2] = data[j*msg.w*3 + i*3 + 2];
msg.pixels[index+3] = 255;
}
}
msg.pixels = msg.pixels.buffer;
postMessage(msg, [msg.pixels]);
}
onmessage = (e) => {
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switch (e.data.cmd) {
case 0x0:
importScripts(e.data.data);
break;
case 0x1:
decode(e.data.data);
break;
default:
console.error("Unknown command " + e.data.cmd);
}
}