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simplify level picker

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mertalev
2026-07-05 21:13:10 -04:00
parent 75ccac8d5d
commit ca64edd93c
1 changed files with 5 additions and 11 deletions
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server/src/utils/media.ts
+5 -11
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@@ -36,28 +36,22 @@ export const getOutputSize = (videoStream: VideoStreamInfo, targetRes: number) =
return isVideoVertical(videoStream) ? { width: targetRes, height: larger } : { width: larger, height: targetRes };
};
const pickLevel = (levels: CodecLevel[], frame: number, rate: number): string => {
for (const level of levels) {
if (frame <= level.maxFrame && rate <= level.maxRate) {
return level.token;
}
}
return levels.at(-1)!.token;
};
const pickLevel = (levels: CodecLevel[], frame: number, rate: number) =>
levels.find((level) => frame <= level.maxFrame && rate <= level.maxRate) ?? levels.at(-1)!;
export const getCodecString = (codec: VideoCodec, width: number, height: number, fps: number): string => {
switch (codec) {
case VideoCodec.H264: {
const macroblocks = Math.ceil(width / 16) * Math.ceil(height / 16);
return `avc1.6400${pickLevel(H264_LEVELS, macroblocks, macroblocks * fps)}`;
return `avc1.6400${pickLevel(H264_LEVELS, macroblocks, macroblocks * fps).token}`;
}
case VideoCodec.Hevc: {
const samples = width * height;
return `hvc1.1.6.${pickLevel(HEVC_LEVELS, samples, samples * fps)}.B0`;
return `hvc1.1.6.${pickLevel(HEVC_LEVELS, samples, samples * fps).token}.B0`;
}
case VideoCodec.Av1: {
const samples = width * height;
return `av01.0.${pickLevel(AV1_LEVELS, samples, samples * fps)}.08`;
return `av01.0.${pickLevel(AV1_LEVELS, samples, samples * fps).token}.08`;
}
default: {
throw new Error(`Codec '${codec}' does not support HLS codec strings`);