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improve video player speed slightly

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Boofdev 2025-02-09 20:01:11 +01:00
parent b774d90cef
commit feeb64f059
1 changed files with 16 additions and 16 deletions
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32
src/routes/term/video2.ts
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@ -54,6 +54,14 @@ export async function play(
return;
}
// Create pixel-to-char lookup table (LUT)
const chars = options.oneBit ? " #" : " .,-:;=+*#%$@";
const lut = new Array(256);
for (let i = 0; i < 256; i++) {
const index = Math.floor((i / 255) * (chars.length - 1));
lut[i] = chars[index];
}
// Calculate the scale
scaleFactor = 100 / video.video_info.width;
@ -123,7 +131,7 @@ export async function play(
}
// Print the frame
stdlib.setLineData([]);
stdlib.print(pixelsToChars(frameData, video.video_info.width, video.video_info.height, options.oneBit));
stdlib.print(pixelsToChars(frameData, video.video_info.width, video.video_info.height, lut));
i++;
} else {
stdlib.showStuff;
@ -156,23 +164,15 @@ function timeToFrame(fps: number, time: number): number {
return (time / 1000) * fps;
}
function pixelToChar(pixel: number, oneBit?: boolean): string {
// Characters in increasing density
let chars = " .,-:;=+*#%$@";
if (oneBit) {
chars = " #";
}
return chars[Math.floor((pixel / 255) * chars.length)];
}
function pixelsToChars(pixels: Uint8Array, width: number, height: number, oneBit?: boolean): string {
let pixelsOut = ""
// Optimized rendering function
function pixelsToChars(pixels: Uint8Array, width: number, height: number, lut: string[]): string {
const lines: string[] = [];
for (let y = 0; y < height; y++) {
const line = [];
for (let x = 0; x < width; x++) {
pixelsOut += pixelToChar(pixels[y * width + x], oneBit)
line.push(lut[pixels[y * width + x]]);
}
pixelsOut += "\n"
lines.push(line.join(''));
}
return pixelsOut
return lines.join('\n');
}