// META: global=window,dedicatedworker
// META: script=/webcodecs/utils.js
// META: variant=?adts_aac
// META: variant=?mp4_aac
// META: variant=?mp3
// META: variant=?opus
// META: variant=?pcm_alaw
// META: variant=?pcm_ulaw
// META: variant=?pcm_u8
// META: variant=?pcm_s16
// META: variant=?pcm_s24
// META: variant=?pcm_s32
// META: variant=?pcm_f32
const ADTS_AAC_DATA = {
src: 'sfx.adts',
config: {
codec: 'mp4a.40.2',
sampleRate: 48000,
numberOfChannels: 1,
},
chunks: [
{offset: 0, size: 248}, {offset: 248, size: 280}, {offset: 528, size: 258},
{offset: 786, size: 125}, {offset: 911, size: 230},
{offset: 1141, size: 148}, {offset: 1289, size: 224},
{offset: 1513, size: 166}, {offset: 1679, size: 216},
{offset: 1895, size: 183}
],
duration: 24000
};
const MP3_DATA = {
src: 'sfx.mp3',
config: {
codec: 'mp3',
sampleRate: 48000,
numberOfChannels: 1,
},
chunks: [
{offset: 333, size: 288}, {offset: 621, size: 288},
{offset: 909, size: 288}, {offset: 1197, size: 288},
{offset: 1485, size: 288}, {offset: 1773, size: 288},
{offset: 2061, size: 288}, {offset: 2349, size: 288},
{offset: 2637, size: 288}, {offset: 2925, size: 288}
],
duration: 24000
};
const MP4_AAC_DATA = {
src: 'sfx-aac.mp4',
config: {
codec: 'mp4a.40.2',
sampleRate: 48000,
numberOfChannels: 1,
description: {offset: 2552, size: 5},
},
chunks: [
{offset: 44, size: 241},
{offset: 285, size: 273},
{offset: 558, size: 251},
{offset: 809, size: 118},
{offset: 927, size: 223},
{offset: 1150, size: 141},
{offset: 1291, size: 217},
{offset: 1508, size: 159},
{offset: 1667, size: 209},
{offset: 1876, size: 176},
],
duration: 21333
};
const OPUS_DATA = {
src: 'sfx-opus.ogg',
config: {
codec: 'opus',
sampleRate: 48000,
numberOfChannels: 1,
description: {offset: 28, size: 19},
},
chunks: [
{offset: 185, size: 450}, {offset: 635, size: 268},
{offset: 903, size: 285}, {offset: 1188, size: 296},
{offset: 1484, size: 287}, {offset: 1771, size: 308},
{offset: 2079, size: 289}, {offset: 2368, size: 286},
{offset: 2654, size: 296}, {offset: 2950, size: 294}
],
duration: 20000
};
function pcm(codec, dataOffset) {
return {
src: `sfx-${codec}.wav`,
config: {
codec: codec,
sampleRate: 48000,
numberOfChannels: 1,
},
// Chunk are arbitrary and will be generated lazily
chunks: [],
offset: dataOffset,
duration: 0
}
}
const PCM_ULAW_DATA = pcm("ulaw", 0x5c);
const PCM_ALAW_DATA = pcm("alaw", 0x5c);
const PCM_U8_DATA = pcm("pcm-u8", 0x4e);
const PCM_S16_DATA = pcm("pcm-s16", 0x4e);
const PCM_S24_DATA = pcm("pcm-s24", 0x66);
const PCM_S32_DATA = pcm("pcm-s32", 0x66);
const PCM_F32_DATA = pcm("pcm-f32", 0x72);
// Allows mutating `callbacks` after constructing the AudioDecoder, wraps calls
// in t.step().
function createAudioDecoder(t, callbacks) {
return new AudioDecoder({
output(frame) {
if (callbacks && callbacks.output) {
t.step(() => callbacks.output(frame));
} else {
t.unreached_func('unexpected output()');
}
},
error(e) {
if (callbacks && callbacks.error) {
t.step(() => callbacks.error(e));
} else {
t.unreached_func('unexpected error()');
}
}
});
}
// Create a view of an ArrayBuffer.
function view(buffer, {offset, size}) {
return new Uint8Array(buffer, offset, size);
}
let CONFIG = null;
let CHUNK_DATA = null;
let CHUNKS = null;
promise_setup(async () => {
const data = {
'?adts_aac': ADTS_AAC_DATA,
'?mp3': MP3_DATA,
'?mp4_aac': MP4_AAC_DATA,
'?opus': OPUS_DATA,
'?pcm_alaw': PCM_ALAW_DATA,
'?pcm_ulaw': PCM_ULAW_DATA,
'?pcm_u8': PCM_U8_DATA,
'?pcm_s16': PCM_S16_DATA,
'?pcm_s24': PCM_S24_DATA,
'?pcm_s32': PCM_S32_DATA,
'?pcm_f32': PCM_F32_DATA,
}[location.search];
// Don't run any tests if the codec is not supported.
assert_equals("function", typeof AudioDecoder.isConfigSupported);
let supported = false;
try {
const support = await AudioDecoder.isConfigSupported({
codec: data.config.codec,
sampleRate: data.config.sampleRate,
numberOfChannels: data.config.numberOfChannels
});
supported = support.supported;
} catch (e) {
}
assert_implements_optional(supported, data.config.codec + ' unsupported');
// Fetch the media data and prepare buffers.
const response = await fetch(data.src);
const buf = await response.arrayBuffer();
CONFIG = {...data.config};
if (data.config.description) {
CONFIG.description = view(buf, data.config.description);
}
CHUNK_DATA = [];
// For PCM, split in chunks of 1200 bytes and compute the rest
if (data.chunks.length == 0) {
let offset = data.offset;
// 1200 is divisible by 2 and 3 and is a plausible packet length
// for PCM: this means that there won't be samples split in two packet
let PACKET_LENGTH = 1200;
let bytesPerSample = 0;
switch (data.config.codec) {
case "pcm-s16": bytesPerSample = 2; break;
case "pcm-s24": bytesPerSample = 3; break;
case "pcm-s32": bytesPerSample = 4; break;
case "pcm-f32": bytesPerSample = 4; break;
default: bytesPerSample = 1; break;
}
while (offset < buf.byteLength) {
let size = Math.min(buf.byteLength - offset, PACKET_LENGTH);
assert_equals(size % bytesPerSample, 0);
CHUNK_DATA.push(view(buf, {offset, size}));
offset += size;
}
data.duration = 1000 * 1000 * PACKET_LENGTH / data.config.sampleRate / bytesPerSample;
} else {
CHUNK_DATA = data.chunks.map((chunk, i) => view(buf, chunk));
}
CHUNKS = CHUNK_DATA.map((encodedData, i) => new EncodedAudioChunk({
type: 'key',
timestamp: i * data.duration,
duration: data.duration,
data: encodedData
}));
});
promise_test(t => {
return AudioDecoder.isConfigSupported(CONFIG);
}, 'Test isConfigSupported()');
promise_test(t => {
// Define a valid config that includes a hypothetical 'futureConfigFeature',
// which is not yet recognized by the User Agent.
const validConfig = {
...CONFIG,
futureConfigFeature: 'foo',
};
// The UA will evaluate validConfig as being "valid", ignoring the
// `futureConfigFeature` it doesn't recognize.
return AudioDecoder.isConfigSupported(validConfig).then((decoderSupport) => {
// AudioDecoderSupport must contain the following properites.
assert_true(decoderSupport.hasOwnProperty('supported'));
assert_true(decoderSupport.hasOwnProperty('config'));
// AudioDecoderSupport.config must not contain unrecognized properties.
assert_false(decoderSupport.config.hasOwnProperty('futureConfigFeature'));
// AudioDecoderSupport.config must contiain the recognized properties.
assert_equals(decoderSupport.config.codec, validConfig.codec);
assert_equals(decoderSupport.config.sampleRate, validConfig.sampleRate);
assert_equals(
decoderSupport.config.numberOfChannels, validConfig.numberOfChannels);
if (validConfig.description) {
// The description must be copied.
assert_false(
decoderSupport.config.description === validConfig.description,
'description is unique');
assert_array_equals(
new Uint8Array(decoderSupport.config.description, 0),
new Uint8Array(validConfig.description, 0), 'description');
} else {
assert_false(
decoderSupport.config.hasOwnProperty('description'), 'description');
}
});
}, 'Test that AudioDecoder.isConfigSupported() returns a parsed configuration');
promise_test(async t => {
const decoder = createAudioDecoder(t);
decoder.configure(CONFIG);
assert_equals(decoder.state, 'configured', 'state');
}, 'Test configure()');
promise_test(t => {
const decoder = createAudioDecoder(t);
return testClosedCodec(t, decoder, CONFIG, CHUNKS[0]);
}, 'Verify closed AudioDecoder operations');
promise_test(async t => {
const callbacks = {};
const decoder = createAudioDecoder(t, callbacks);
let outputs = 0;
callbacks.output = frame => {
outputs++;
frame.close();
};
decoder.configure(CONFIG);
CHUNKS.forEach(chunk => {
decoder.decode(chunk);
});
await decoder.flush();
assert_equals(outputs, CHUNKS.length, 'outputs');
}, 'Test decoding');
promise_test(async t => {
const callbacks = {};
const decoder = createAudioDecoder(t, callbacks);
let outputs = 0;
callbacks.output = frame => {
outputs++;
frame.close();
};
decoder.configure(CONFIG);
decoder.decode(new EncodedAudioChunk(
{type: 'key', timestamp: -42, data: CHUNK_DATA[0]}));
await decoder.flush();
assert_equals(outputs, 1, 'outputs');
}, 'Test decoding a with negative timestamp');
promise_test(async t => {
const callbacks = {};
const decoder = createAudioDecoder(t, callbacks);
let outputs = 0;
callbacks.output = frame => {
outputs++;
frame.close();
};
decoder.configure(CONFIG);
decoder.decode(CHUNKS[0]);
await decoder.flush();
assert_equals(outputs, 1, 'outputs');
decoder.decode(CHUNKS[0]);
await decoder.flush();
assert_equals(outputs, 2, 'outputs');
}, 'Test decoding after flush');
promise_test(async t => {
const callbacks = {};
const decoder = createAudioDecoder(t, callbacks);
decoder.configure(CONFIG);
decoder.decode(CHUNKS[0]);
decoder.decode(CHUNKS[1]);
const flushDone = decoder.flush();
// Wait for the first output, then reset.
let outputs = 0;
await new Promise(resolve => {
callbacks.output = frame => {
outputs++;
assert_equals(outputs, 1, 'outputs');
decoder.reset();
frame.close();
resolve();
};
});
// Flush should have been synchronously rejected.
await promise_rejects_dom(t, 'AbortError', flushDone);
assert_equals(outputs, 1, 'outputs');
}, 'Test reset during flush');
promise_test(async t => {
const callbacks = {};
const decoder = createAudioDecoder(t, callbacks);
// No decodes yet.
assert_equals(decoder.decodeQueueSize, 0);
decoder.configure(CONFIG);
// Still no decodes.
assert_equals(decoder.decodeQueueSize, 0);
let lastDequeueSize = Infinity;
decoder.ondequeue = () => {
assert_greater_than(lastDequeueSize, 0, "Dequeue event after queue empty");
assert_greater_than(lastDequeueSize, decoder.decodeQueueSize,
"Dequeue event without decreased queue size");
lastDequeueSize = decoder.decodeQueueSize;
};
for (let chunk of CHUNKS)
decoder.decode(chunk);
assert_greater_than_equal(decoder.decodeQueueSize, 0);
assert_less_than_equal(decoder.decodeQueueSize, CHUNKS.length);
await decoder.flush();
// We can guarantee that all decodes are processed after a flush.
assert_equals(decoder.decodeQueueSize, 0);
// Last dequeue event should fire when the queue is empty.
assert_equals(lastDequeueSize, 0);
// Reset this to Infinity to track the decline of queue size for this next
// batch of decodes.
lastDequeueSize = Infinity;
for (let chunk of CHUNKS)
decoder.decode(chunk);
assert_greater_than_equal(decoder.decodeQueueSize, 0);
decoder.reset();
assert_equals(decoder.decodeQueueSize, 0);
}, 'AudioDecoder decodeQueueSize test');
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