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content / test / data / gpu / webcodecs / manual-svc.js [blame]
// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
'use strict';
function showFrameForDebug(frame) {
const cnv = document.getElementById('debug_cnv');
var ctx = cnv.getContext('2d');
ctx.drawImage(frame, 0, 0);
}
async function main(arg) {
const width = 640;
const height = 480;
const frames_to_encode = 32;
let frames_encoded = 0;
let frames_decoded = 0;
let errors = 0;
const base_layer_decimator = ([1, 1, 2, 4])[arg.layers];
let expected_dot_count = [];
const encoder_config = {
codec: arg.codec,
hardwareAcceleration: arg.acceleration,
width: width,
height: height,
bitrateMode: 'quantizer',
scalabilityMode: 'manual',
latencyMode: 'realtime',
};
TEST.log('Starting test with arguments: ' + JSON.stringify(arg));
let supported = false;
try {
supported =
(await VideoEncoder.isConfigSupported(encoder_config)).supported;
} catch (e) {
}
if (!supported) {
TEST.skip('Unsupported codec: ' + arg.codec);
return;
}
let decoder = new VideoDecoder({
output(frame) {
frames_decoded++;
let dots = expected_dot_count.shift();
TEST.log(`Decoded frame ${frame.timestamp} ${frames_decoded} ${dots}`);
// Check that we have intended number of dots and no more.
// Completely black frame shouldn't pass the test.
if (!validateBlackDots(frame, dots) ||
validateBlackDots(frame, dots + 1)) {
showFrameForDebug(frame);
TEST.reportFailure(
`Unexpected dot count ts:${frame.timestamp} dots:${dots}`);
}
frame.close();
},
error(e) {
errors++;
TEST.log(e);
}
});
const encoder_init = {
output(chunk, metadata) {
let config = metadata.decoderConfig;
if (config) {
decoder.configure(config);
}
if (frames_encoded % base_layer_decimator == 0) {
decoder.decode(chunk);
}
frames_encoded++;
},
error(e) {
errors++;
TEST.log(e);
}
};
let encoder = new VideoEncoder(encoder_init);
encoder.configure(encoder_config);
const buffers = encoder.getAllFrameBuffers();
const last_base_layer_buffer = buffers[0];
TEST.assert(buffers.length == 3, 'expect 3 encoder buffers');
let source = new CanvasSource(width, height);
for (let i = 0; i < frames_to_encode; i++) {
let frame = await source.getNextFrame();
const encode_options = {keyFrame: false, av1: {quantizer: 5}};
switch (arg.layers) {
case 0:
// No layers. Each frame can be decoded on its own, no dependencies.
encode_options.updateBuffer = last_base_layer_buffer;
break;
case 1:
// Single layer, each frame depends on the previous one.
encode_options.updateBuffer = last_base_layer_buffer;
encode_options.referenceBuffers = [last_base_layer_buffer];
break;
case 2:
// Two temporal layers L1T2
// Layer Index 0: |0| |2| |4| |6|
// Layer Index 1: | |1| |3| |5| |7
if (i % 2 == 0) {
encode_options.updateBuffer = last_base_layer_buffer;
}
encode_options.referenceBuffers = [last_base_layer_buffer];
break;
case 3:
// Three temporal layers L1T3
// Layer Index 0: |0| | | |4| | | |8| | | |12|
// Layer Index 1: | | |2| | | |6| | | |10| | |
// Layer Index 2: | |1| |3| |5| |7| |9| |11| |
const middle_layer_buffer = buffers[1];
const index_in_cycle = i % 4;
encode_options.referenceBuffers = [last_base_layer_buffer];
if (index_in_cycle == 0) {
// Base layer frame.
encode_options.updateBuffer = last_base_layer_buffer;
} else if (index_in_cycle == 1) {
// First frame of the highest layer.
} else if (index_in_cycle == 2) {
// Middle layer.
encode_options.updateBuffer = middle_layer_buffer;
} else {
// Second frame of the highest layer.
encode_options.referenceBuffers.push(middle_layer_buffer);
}
break;
}
encoder.encode(frame, encode_options);
if (i % base_layer_decimator == 0)
expected_dot_count.push(i);
frame.close();
await waitForNextFrame();
}
await encoder.flush();
await decoder.flush();
encoder.close();
decoder.close();
source.close();
TEST.assert(
errors == 0, 'Decoding or encoding errors occurred during the test');
TEST.assert(
frames_encoded == frames_to_encode,
'frames_encoded mismatch: ' + frames_encoded);
let base_layer_frames = frames_encoded / base_layer_decimator;
TEST.assert(
frames_decoded == base_layer_frames,
'frames_decoded mismatch: ' + frames_decoded);
TEST.log('Test completed');
}