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Fully update MP3 demuxer to use new packet reading system & mutex, add MP3 reading tests

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Vanilagy
2025-12-21 11:52:54 +01:00
parent ece27cca79
commit 00efb69a7d
6 changed files with 287 additions and 141 deletions
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src/input-track.ts
+32 -10
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@@ -38,14 +38,12 @@ export interface InputTrackBacking {
getLanguageCode(): string;
getTimeResolution(): number;
getDisposition(): TrackDisposition;
getFirstTimestamp(): Promise<number>;
computeDuration(): Promise<number>;
getFirstPacket(res: ResultValue<EncodedPacket | null>, options: PacketRetrievalOptions): MaybePromise<Yo>;
getNextPacket(res: ResultValue<EncodedPacket | null>, packet: EncodedPacket, options: PacketRetrievalOptions): MaybePromise<Yo>;
getPacket(res: ResultValue<EncodedPacket | null>, timestamp: number, options: PacketRetrievalOptions): MaybePromise<Yo>;
getKeyPacket(res: ResultValue<EncodedPacket | null>, timestamp: number, options: PacketRetrievalOptions): MaybePromise<Yo>;
getNextKeyPacket(res: ResultValue<EncodedPacket | null>, packet: EncodedPacket, options: PacketRetrievalOptions): MaybePromise<Yo>;
getFirstPacket(res: ResultValue<EncodedPacket | null>, options: PacketRetrievalOptions): Promise<Yo>;
getNextPacket(res: ResultValue<EncodedPacket | null>, packet: EncodedPacket, options: PacketRetrievalOptions): Promise<Yo>;
getPacket(res: ResultValue<EncodedPacket | null>, timestamp: number, options: PacketRetrievalOptions): Promise<Yo>;
getKeyPacket(res: ResultValue<EncodedPacket | null>, timestamp: number, options: PacketRetrievalOptions): Promise<Yo>;
getNextKeyPacket(res: ResultValue<EncodedPacket | null>, packet: EncodedPacket, options: PacketRetrievalOptions): Promise<Yo>;
// getFirstPacket(options: PacketRetrievalOptions): Promise<EncodedPacket | null>;
// getPacket(timestamp: number, options: PacketRetrievalOptions): Promise<EncodedPacket | null>;
@@ -147,12 +145,36 @@ export abstract class InputTrack {
* with a negative timestamp should not be presented.
*/
getFirstTimestamp() {
return this._backing.getFirstTimestamp();
const result = new ResultValue<EncodedPacket | null>();
const promise = this._backing.getFirstPacket(result, { metadataOnly: true });
const getValue = () => {
const firstPacket = result.value;
return firstPacket?.timestamp ?? 0;
};
if (result.pending) {
return (promise).then(getValue);
} else {
return getValue();
}
}
/** Returns the end timestamp of the last packet of this track, in seconds. */
computeDuration() {
return this._backing.computeDuration();
computeDuration(): MaybePromise<number> {
const result = new ResultValue<EncodedPacket | null>();
const promise = this._backing.getPacket(result, Infinity, { metadataOnly: true });
const getValue = () => {
const lastPacket = result.value;
return (lastPacket?.timestamp ?? 0) + (lastPacket?.duration ?? 0);
};
if (result.pending) {
return (promise).then(getValue);
} else {
return getValue();
}
}
/**