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refactor(mediabunny): [PKG-MB-08] finish typed media capability boundaries
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Harvey Zhao committed
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@@ -46,8 +46,8 @@ view in `types/media.d.ts` is opt-in and checked against the real VideoShim clas
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The thirty-four production TypeScript modules use strict checking with `skipLibCheck: false`
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and no ambient Node types. The coordinator and both decoder engines are checked
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implementations; there are no remaining adjacent JavaScript declaration bridges.
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All owned production JavaScript has been migrated. This source milestone does not complete
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PKG-MB-08: unsupported decoder fallback/readiness still needs its remaining review.
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All owned production JavaScript has been migrated. PKG-MB-08 also checks public consumer
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compatibility and distinguishes supported partial media from wholly undecodable inputs.
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The entry preserves native Canvas method priority, detached createElement invocation,
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two reads of enumerable native method accessors, direct-prototype forwarding, bound shim
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@@ -162,8 +162,18 @@ callbacks have source and request identity and are detached on replacement, draw
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Background decoder failure stops rendering and reports one media error through the coordinator,
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even if audio cleanup fails. Iterator cleanup failures are observed and warned; explicit
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stopIterator still rejects. Missing 2D context fails at use with a descriptive error, rather
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than becoming falsely ready. Capability handling for existing undecodable tracks remains
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under MB-CAP-01/MB-READY-01; the current no-video fallback is preserved for that separate review.
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than becoming falsely ready. Existing but undecodable tracks may use the historical
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no-video/no-audio fallback only when at least one selected decoder is usable.
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`readiness.requireDecoder` checks the actual audio/video sinks after their existing SDK
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capability checks. It does not issue duplicate canDecode queries or change decoder load
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return values. The metadata barrier checks before publishing metadata, and the load
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completion checks before publishing data/canplay. Track replacement checks after decoder
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setup and before seeking or publishing its success sequence. Without either sink, readyState
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returns to zero and the existing code-4 error channel reports
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`Input has no decodable audio or video tracks.` Active SDK query errors retain their own
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messages. Valid audio-only/video-only and mixed inputs with one usable track retain normal
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readiness/playback; canceled queries cannot report against a newer source or destroyed player.
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## Audio clock and resource ownership
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@@ -266,9 +276,9 @@ consumers. Do not switch to export= or a required default member without those c
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`canPlayType()` still always returns maybe; buffered/played/seekable and RAF metadata remain
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synthetic. None is proof that a codec or browser can play the input. Missing Web Audio or
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WebCodecs in Windows WebKit remains an unsupported-capability control. Existing but
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undecodable tracks can still take historical clock-only fallback; remaining MB-08 work
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must distinguish valid audio-only/video-only playback from false readiness with no usable
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decoder, including selection replacement. Native/long-play/device acceptance remains MB-09.
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undecodable tracks no longer produce clock-only false readiness when all selected decoders
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are unusable. Partial playback retains the usable decoder. Native/long-play/device acceptance
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remains MB-09; no synthetic capability probe proves support on a physical Safari device.
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## Validation and remaining work
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@@ -283,6 +293,7 @@ yarn test:browser test/browser/mediabunny-video.spec.js
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yarn test:browser test/browser/mediabunny-audio.spec.js
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yarn test:browser test/browser/mediabunny-hls.spec.js
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yarn test:browser test/browser/mediabunny-entry.spec.js
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yarn test:browser test/browser/mediabunny-capability.spec.js
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```
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Node tests use actual SDK parsing and controlled lifecycle interleavings. Browser tests
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@@ -44,7 +44,9 @@ SDK track objects need explicit narrowing with your application's SDK types.
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The `canPlayType()` response remains `maybe` for compatibility; it does not test codec
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support. TimeRanges and frame callback metadata are synthetic. Actual playback requires
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supported codecs and browser media APIs; a `legacy` bundle does not polyfill those APIs.
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Decoder fallback and broader browser/device validation remain in progress.
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When every selected track is undecodable, loading or track replacement reports error code 4
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without a success readiness sequence. Partial playback keeps a usable audio or video track.
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Broader browser/device validation remains in progress.
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ESM default imports and `/legacy` type resolution now support the tested TS 5.9 and
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TS 4.3 modes. CommonJS supports both direct calls and the old `require(...).default`
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@@ -4,4 +4,4 @@
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* (c) 2017-2026 Harvey Zhao
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* Released under the MIT License.
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*/
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+1
-1
@@ -4,4 +4,4 @@
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* (c) 2017-2026 Harvey Zhao
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* Released under the MIT License.
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*/
|
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Y(this,null,function*(){var e,s;if(r||t.engine.destroyed)return;const c=++n,d=t.engine.loadSeq,h=()=>c===n&&l(d);try{const r=yield t.getM3u8State();if(!h())return;const n=(null==(e=i.m3u8)?void 0:e.quality)||{},c=function(e,t,i){vaLine truncated
|
||||
@@ -24403,6 +24403,12 @@ class AudioTask {
|
||||
this.timers.clear();
|
||||
}
|
||||
}
|
||||
function requireDecoder(host) {
|
||||
if (host.audio.audioSink || host.video.videoSink)
|
||||
return;
|
||||
host.readyState = 0;
|
||||
throw new Error("Input has no decodable audio or video tracks.");
|
||||
}
|
||||
function publish(events, current, names) {
|
||||
for (const name of names) {
|
||||
if (!current())
|
||||
@@ -25127,6 +25133,7 @@ class Playback {
|
||||
await Promise.all([this.host.video.load(media), this.host.audio.load(media)]);
|
||||
if (!current())
|
||||
return;
|
||||
requireDecoder(this.host);
|
||||
await Promise.all([this.host.video.seek(time), this.host.audio.seek(time)]);
|
||||
if (current()) {
|
||||
this.host.readyState = 4;
|
||||
@@ -25815,6 +25822,7 @@ class MediaBunnyEngine {
|
||||
this.input = input;
|
||||
this.media = media;
|
||||
const metadata = metadataBarrier(() => {
|
||||
requireDecoder(this);
|
||||
this.readyState = 1;
|
||||
publish(this.events, current, ["loadedmetadata", "durationchange", "progress"]);
|
||||
}, current);
|
||||
@@ -25824,6 +25832,7 @@ class MediaBunnyEngine {
|
||||
await Promise.all([video, audio2]);
|
||||
if (!current())
|
||||
return;
|
||||
requireDecoder(this);
|
||||
this.readyState = 4;
|
||||
this.networkState = 1;
|
||||
publish(this.events, current, ["loadeddata", "canplay", "canplaythrough", "progress"]);
|
||||
|
||||
@@ -10,7 +10,7 @@ import { getHlsState } from './hls-state'
|
||||
import { createInput } from './input'
|
||||
import LoadSession from './load-session'
|
||||
import Playback from './playback'
|
||||
import { metadataBarrier, publish } from './readiness'
|
||||
import { metadataBarrier, publish, requireDecoder } from './readiness'
|
||||
import { selectPlaybackTracks } from './tracks'
|
||||
import VideoEngine from './VideoEngine.js'
|
||||
|
||||
@@ -150,6 +150,7 @@ export default class MediaBunnyEngine implements EnginePort {
|
||||
this.input = input
|
||||
this.media = media
|
||||
const metadata = metadataBarrier(() => {
|
||||
requireDecoder(this)
|
||||
this.readyState = 1
|
||||
publish(this.events, current, ['loadedmetadata', 'durationchange', 'progress'])
|
||||
}, current)
|
||||
@@ -159,6 +160,7 @@ export default class MediaBunnyEngine implements EnginePort {
|
||||
await Promise.all([video, audio])
|
||||
if (!current())
|
||||
return
|
||||
requireDecoder(this)
|
||||
this.readyState = 4
|
||||
this.networkState = 1
|
||||
publish(this.events, current, ['loadeddata', 'canplay', 'canplaythrough', 'progress'])
|
||||
|
||||
@@ -1,9 +1,10 @@
|
||||
import type { Input } from 'mediabunny'
|
||||
import type { AudioBufferSink, CanvasSink, Input } from 'mediabunny'
|
||||
import type { ProxyOptions } from './engine-types'
|
||||
import type EventTarget from './EventTarget'
|
||||
import type { PlaybackMedia } from './media'
|
||||
|
||||
export interface AudioPort {
|
||||
readonly audioSink: AudioBufferSink | null
|
||||
cancelPending: () => void
|
||||
readonly currentTime: number
|
||||
duration: number
|
||||
@@ -19,6 +20,7 @@ export interface AudioPort {
|
||||
}
|
||||
|
||||
export interface VideoPort {
|
||||
readonly videoSink: CanvasSink | null
|
||||
cancelPending: () => void
|
||||
width: number
|
||||
height: number
|
||||
|
||||
@@ -1,6 +1,6 @@
|
||||
import type { PlaybackHost } from './engine-ports'
|
||||
import type { PlaybackMedia } from './media'
|
||||
import { publish } from './readiness'
|
||||
import { publish, requireDecoder } from './readiness'
|
||||
import { resolveDuration } from './tracks'
|
||||
|
||||
interface Completion {
|
||||
@@ -156,6 +156,7 @@ export default class Playback {
|
||||
await Promise.all([this.host.video.load(media), this.host.audio.load(media)])
|
||||
if (!current())
|
||||
return
|
||||
requireDecoder(this.host)
|
||||
await Promise.all([this.host.video.seek(time), this.host.audio.seek(time)])
|
||||
if (current()) {
|
||||
this.host.readyState = 4
|
||||
|
||||
@@ -1,5 +1,14 @@
|
||||
import type { PlaybackHost } from './engine-ports'
|
||||
import type EventTarget from './EventTarget'
|
||||
|
||||
export function requireDecoder(host: Pick<PlaybackHost, 'audio' | 'video' | 'readyState'>): void {
|
||||
// Sinks reflect the decoder's completed capability check; do not query the SDK twice.
|
||||
if (host.audio.audioSink || host.video.videoSink)
|
||||
return
|
||||
host.readyState = 0
|
||||
throw new Error('Input has no decodable audio or video tracks.')
|
||||
}
|
||||
|
||||
export function publish(events: EventTarget, current: () => boolean, names: readonly string[]): void {
|
||||
for (const name of names) {
|
||||
if (!current())
|
||||
|
||||
Reference in new issue
Block a user