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Add methods that check decodability

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Vanilagy
2025-01-02 19:08:09 +01:00
parent ad653434a6
commit 0f25dcb096
4 changed files with 105 additions and 54 deletions
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src/input-track.ts
+36 -11
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@@ -3,7 +3,7 @@ import { ChunkRetrievalOptions } from './media-drain';
import { Rotation } from './misc';
export interface InputTrackBacking {
getCodec(): Promise<MediaCodec>;
getCodec(): Promise<MediaCodec | null>;
computeDuration(): Promise<number>;
}
@@ -17,8 +17,9 @@ export abstract class InputTrack {
this._backing = backing;
}
abstract getCodec(): Promise<MediaCodec>;
abstract getCodecMimeType(): Promise<string>;
abstract getCodec(): Promise<MediaCodec | null>;
abstract getCodecMimeType(): Promise<string | null>;
abstract canDecode(): Promise<boolean>;
isVideoTrack(): this is InputVideoTrack {
return this instanceof InputVideoTrack;
@@ -34,11 +35,11 @@ export abstract class InputTrack {
}
export interface InputVideoTrackBacking extends InputTrackBacking {
getCodec(): Promise<VideoCodec>;
getCodec(): Promise<VideoCodec | null>;
getCodedWidth(): Promise<number>;
getCodedHeight(): Promise<number>;
getRotation(): Promise<Rotation>;
getDecoderConfig(): Promise<VideoDecoderConfig>;
getDecoderConfig(): Promise<VideoDecoderConfig | null>;
getFirstChunk(options: ChunkRetrievalOptions): Promise<EncodedVideoChunk | null>;
getChunk(timestamp: number, options: ChunkRetrievalOptions): Promise<EncodedVideoChunk | null>;
getNextChunk(chunk: EncodedVideoChunk, options: ChunkRetrievalOptions): Promise<EncodedVideoChunk | null>;
@@ -58,7 +59,7 @@ export class InputVideoTrack extends InputTrack {
this._backing = backing;
}
getCodec(): Promise<VideoCodec> {
getCodec(): Promise<VideoCodec | null> {
return this._backing.getCodec();
}
@@ -90,15 +91,25 @@ export class InputVideoTrack extends InputTrack {
async getCodecMimeType() {
const decoderConfig = await this.getDecoderConfig();
return decoderConfig.codec;
return decoderConfig?.codec ?? null;
}
async canDecode() {
const decoderConfig = await this._backing.getDecoderConfig();
if (!decoderConfig) {
return false;
}
const support = await VideoDecoder.isConfigSupported(decoderConfig);
return support.supported === true;
}
}
export interface InputAudioTrackBacking extends InputTrackBacking {
getCodec(): Promise<AudioCodec>;
getCodec(): Promise<AudioCodec | null>;
getNumberOfChannels(): Promise<number>;
getSampleRate(): Promise<number>;
getDecoderConfig(): Promise<AudioDecoderConfig>;
getDecoderConfig(): Promise<AudioDecoderConfig | null>;
getFirstChunk(options: ChunkRetrievalOptions): Promise<EncodedAudioChunk | null>;
getChunk(timestamp: number, options: ChunkRetrievalOptions): Promise<EncodedAudioChunk | null>;
getNextChunk(chunk: EncodedAudioChunk, options: ChunkRetrievalOptions): Promise<EncodedAudioChunk | null>;
@@ -118,7 +129,7 @@ export class InputAudioTrack extends InputTrack {
this._backing = backing;
}
getCodec(): Promise<AudioCodec> {
getCodec(): Promise<AudioCodec | null> {
return this._backing.getCodec();
}
@@ -136,6 +147,20 @@ export class InputAudioTrack extends InputTrack {
async getCodecMimeType() {
const decoderConfig = await this.getDecoderConfig();
return decoderConfig.codec;
return decoderConfig?.codec ?? null;
}
async canDecode() {
const decoderConfig = await this._backing.getDecoderConfig();
if (!decoderConfig) {
return false;
}
if (decoderConfig.codec.startsWith('pcm-')) {
return true; // Since we decode it ourselves
} else {
const support = await AudioDecoder.isConfigSupported(decoderConfig);
return support.supported === true;
}
}
}