Fix failing tests, add missing license headers

src/custom-coder.ts

@@ -7,6 +7,8 @@
  */
 
 import { AudioCodec, VideoCodec } from './codec';
+import { canDecodeAudioMemo, canDecodeVideoMemo } from './decode';
+import { canEncodeAudioMemo, canEncodeVideoMemo } from './encode';
 import { MaybePromise } from './misc';
 import { EncodedPacket } from './packet';
 import { AudioSample, VideoSample } from './sample';
@@ -152,6 +154,7 @@ export const registerDecoder = (decoder: typeof CustomVideoDecoder | typeof Cust
 		}
 
 		customVideoDecoders.push(casted);
+		canDecodeVideoMemo.clear();
 	} else if (decoder.prototype instanceof CustomAudioDecoder) {
 		const casted = decoder as typeof CustomAudioDecoder;
 
@@ -161,6 +164,7 @@ export const registerDecoder = (decoder: typeof CustomVideoDecoder | typeof Cust
 		}
 
 		customAudioDecoders.push(casted);
+		canDecodeAudioMemo.clear();
 	} else {
 		throw new TypeError('Decoder must be a CustomVideoDecoder or CustomAudioDecoder.');
 	}
@@ -182,6 +186,7 @@ export const registerEncoder = (encoder: typeof CustomVideoEncoder | typeof Cust
 		}
 
 		customVideoEncoders.push(casted);
+		canEncodeVideoMemo.clear();
 	} else if (encoder.prototype instanceof CustomAudioEncoder) {
 		const casted = encoder as typeof CustomAudioEncoder;
 
@@ -191,6 +196,7 @@ export const registerEncoder = (encoder: typeof CustomVideoEncoder | typeof Cust
 		}
 
 		customAudioEncoders.push(casted);
+		canEncodeAudioMemo.clear();
 	} else {
 		throw new TypeError('Encoder must be a CustomVideoEncoder or CustomAudioEncoder.');
 	}

src/decode.ts

@@ -22,8 +22,8 @@ import {
 import { customAudioDecoders, customVideoDecoders } from './custom-coder';
 import { isAllowSharedBufferSource, SetOptional } from './misc';
 
-const canDecodeVideoMemo = new Map<string, Promise<boolean>>();
-const canDecodeAudioMemo = new Map<string, Promise<boolean>>();
+export const canDecodeVideoMemo = new Map<string, Promise<boolean>>();
+export const canDecodeAudioMemo = new Map<string, Promise<boolean>>();
 
 const validateVideoDecodingConfig = (codec: VideoCodec, options: SetOptional<VideoDecoderConfig, 'codec'>) => {
 	if (!options || typeof options !== 'object') {

src/encode.ts

@@ -26,8 +26,8 @@ import { isFirefox, MaybePromise, Rotation } from './misc';
 import { EncodedPacket } from './packet';
 import { AudioSample, CropRectangle, validateCropRectangle, VideoSample } from './sample';
 
-const canEncodeVideoMemo = new Map<string, Promise<boolean>>();
-const canEncodeAudioMemo = new Map<string, Promise<boolean>>();
+export const canEncodeVideoMemo = new Map<string, Promise<boolean>>();
+export const canEncodeAudioMemo = new Map<string, Promise<boolean>>();
 
 /**
  * Configuration object that controls video encoding. Can be used to set codec, quality, and more.

src/flac/flac-muxer.ts

@@ -49,16 +49,16 @@ export class FlacMuxer extends Muxer {
 		super(output);
 
 		this.format = format;
-
-		if (this.format._options.appendOnly) {
-			this.writer.ensureMonotonicity();
-		}
 	}
 
 	async start() {
 		const release = await this.mutex.acquire();
 
 		this.writer = await this.output._getRootWriter();
+		if (this.format._options.appendOnly) {
+			this.writer.ensureMonotonicity();
+		}
+
 		this.writer.write(FLAC_HEADER);
 
 		release();

src/hls/hls-demuxer.ts

@@ -1,3 +1,11 @@
+/*!
+ * Copyright (c) 2026-present, Vanilagy and contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
 import { AUDIO_CODECS, AudioCodec, inferCodecFromCodecString, MediaCodec, VIDEO_CODECS, VideoCodec } from '../codec';
 import { Demuxer, DurationMetadataRequestOptions } from '../demuxer';
 import { Input } from '../input';

src/hls/hls-misc.ts

@@ -1,3 +1,11 @@
+/*!
+ * Copyright (c) 2026-present, Vanilagy and contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
 export const canIgnoreLine = (line: string) => line.length === 0 || (line.startsWith('#') && !line.startsWith('#EXT'));
 
 export class AttributeList {

src/hls/hls-muxer.ts

@@ -1,3 +1,11 @@
+/*!
+ * Copyright (c) 2026-present, Vanilagy and contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
 import { MediaCodec, validateAudioChunkMetadata, validateVideoChunkMetadata } from '../codec';
 import { EncodedAudioPacketSource, EncodedVideoPacketSource } from '../media-source';
 import { arrayArgmax, assert, findLastIndex, joinPaths, textEncoder, toArray, UNDETERMINED_LANGUAGE } from '../misc';

src/hls/hls-segmented-input.ts

@@ -1,3 +1,11 @@
+/*!
+ * Copyright (c) 2026-present, Vanilagy and contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
 import { AES_128_BLOCK_SIZE, createAes128CbcDecryptStream } from '../aes';
 import { ENCRYPTION_KEY_CACHE_GROUP, Input } from '../input';
 import { Segment, SegmentedInput, SegmentRetrievalOptions } from '../segmented-input';

src/resample.ts

@@ -1,3 +1,11 @@
+/*!
+ * Copyright (c) 2026-present, Vanilagy and contributors
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
 import { assert } from './misc';
 import { AudioSample } from './sample';