Method configureInternal

src/video_decoder.ts:193–221

(config: VideoDecoderConfig)

	}

	private async configureInternal(config: VideoDecoderConfig) {
		const currentConfigId = this.currentConfigId;

		using lock = this.mutex.lock();
		if (lock.pending) await lock.ready;

		// Check if reset/close happened while waiting for lock
		if (this.currentConfigId !== currentConfigId) {
			return;
		}

		// Spec 4.5: If supported is false, queue a task to run the Close VideoDecoder algorithm with NotSupportedError.
		// This is simulated by just trying to open the codec.

		if (this.codecContext) {
			this.codecContext.freeContext();
			this.codecContext = null;
		}

		this.codecContext = VideoDecoderPolyfill.createCodecContext(config);
		if (!this.codecContext) {
			throw new DOMException('Unsupported configuration', 'NotSupportedError');
		}

		const ret = await this.codecContext.open2();
		if (ret < 0) {
			throw new DOMException('Failed to open codec', 'NotSupportedError');
		}
	}

	/**
	 * Queues an encoded video chunk to be decoded.