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Improve blurhash performance of HD images

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Alex Gleason 2025-03-01 13:55:59 -06:00
parent 9051a59733
commit 8c61efd75e
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GPG key ID: 7211D1F99744FBB7
1 changed files with 21 additions and 15 deletions
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36
packages/ditto/utils/upload.ts
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@ -113,25 +113,26 @@ export async function uploadFile(
const video = probe?.streams.find((stream) => stream.codec_type === 'video'); const video = probe?.streams.find((stream) => stream.codec_type === 'video');
if (video && video.width && video.height) { if (video && video.width && video.height) {
const { width, height } = video;
if (!dim) { if (!dim) {
tags.push(['dim', `${video.width}x${video.height}`]); tags.push(['dim', `${width}x${height}`]);
} }
if (!blurhash) { if (!blurhash) {
try { try {
const img = sharp(bytes); const { data, info } = await sharp(bytes)
const { width, height } = await img.metadata(); .raw()
.ensureAlpha()
.resize({
width: width > height ? undefined : 64,
height: height > width ? undefined : 64,
fit: 'inside',
})
.toBuffer({ resolveWithObject: true });
if (!blurhash && (width && height)) { const blurhash = encode(new Uint8ClampedArray(data), info.width, info.height, 4, 4);
const pixels = await img tags.push(['blurhash', blurhash]);
.raw()
.ensureAlpha()
.toBuffer({ resolveWithObject: false })
.then((buffer) => new Uint8ClampedArray(buffer));
const blurhash = encode(pixels, width, height, 4, 4);
tags.push(['blurhash', blurhash]);
}
} catch (e) { } catch (e) {
logi({ level: 'error', ns: 'ditto.upload.analyze', error: errorJson(e) }); logi({ level: 'error', ns: 'ditto.upload.analyze', error: errorJson(e) });
} }
@ -156,6 +157,11 @@ export async function uploadFile(
const pixels = await img const pixels = await img
.raw() .raw()
.ensureAlpha() .ensureAlpha()
.resize({
width: width > height ? undefined : 64,
height: height > width ? undefined : 64,
fit: 'inside',
})
.toBuffer({ resolveWithObject: false }) .toBuffer({ resolveWithObject: false })
.then((buffer) => new Uint8ClampedArray(buffer)); .then((buffer) => new Uint8ClampedArray(buffer));
@ -179,8 +185,6 @@ export async function uploadFile(
dittoUploads.set(upload.id, upload); dittoUploads.set(upload.id, upload);
perf.mark('end');
const timing = [ const timing = [
perf.measure('probe', 'probe-start', 'probe-end'), perf.measure('probe', 'probe-start', 'probe-end'),
perf.measure('transcode', 'transcode-start', 'transcode-end'), perf.measure('transcode', 'transcode-start', 'transcode-end'),
@ -192,6 +196,8 @@ export async function uploadFile(
return acc; return acc;
}, {}); }, {});
perf.mark('end');
logi({ logi({
level: 'info', level: 'info',
ns: 'ditto.upload', ns: 'ditto.upload',