Add some more argument validation

dev/player.html

@@ -48,8 +48,8 @@ let videoRotation = 0;
 if (!videoTrack) {
 	canvas.style.display = 'none';
 } else {
-	canvas.width = await videoTrack.getRotatedWidth();
-	canvas.height = await videoTrack.getRotatedHeight();
+	canvas.width = await videoTrack.getDisplayWidth();
+	canvas.height = await videoTrack.getDisplayHeight();
 }
 
 const totalDuration = await input.computeDuration();

dist/metamuxer.d.ts

@@ -4,11 +4,6 @@ export declare const ALL_FORMATS: InputFormat[];
 /** @public */
 export declare type AnyIterable<T> = Iterable<T> | AsyncIterable<T>;
 
-/** @public */
-export declare class ArrayBufferSource extends Source {
-    constructor(buffer: ArrayBuffer);
-}
-
 /** @public */
 export declare class ArrayBufferTarget extends Target {
     buffer: ArrayBuffer | null;
@@ -83,6 +78,12 @@ export declare class BlobSource extends Source {
     constructor(blob: Blob);
 }
 
+/** @public */
+declare class BufferSource_2 extends Source {
+    constructor(buffer: ArrayBuffer | Uint8Array);
+}
+export { BufferSource_2 as BufferSource }
+
 /** @public */
 export declare class CanvasDrain {
     constructor(videoTrack: InputVideoTrack, dimensions?: {
@@ -152,7 +153,7 @@ export declare class Input {
 
 /** @public */
 export declare class InputAudioTrack extends InputTrack {
-    getCodec(): Promise<"aac" | "opus">;
+    getCodec(): Promise<AudioCodec>;
     getNumberOfChannels(): Promise<number>;
     getSampleRate(): Promise<number>;
     getDecoderConfig(): Promise<AudioDecoderConfig>;
@@ -180,7 +181,7 @@ export declare abstract class InputTrack {
 
 /** @public */
 export declare class InputVideoTrack extends InputTrack {
-    getCodec(): Promise<"avc" | "hevc" | "vp8" | "vp9" | "av1">;
+    getCodec(): Promise<VideoCodec>;
     getCodedWidth(): Promise<number>;
     getCodedHeight(): Promise<number>;
     getRotation(): Promise<Rotation>;

dist/metamuxer.js

@@ -23,7 +23,6 @@ var Metamuxer = (() => {
   __export(src_exports, {
     ALL_FORMATS: () => ALL_FORMATS,
     AUDIO_CODECS: () => AUDIO_CODECS,
-    ArrayBufferSource: () => ArrayBufferSource,
     ArrayBufferTarget: () => ArrayBufferTarget,
     AudioBufferDrain: () => AudioBufferDrain,
     AudioBufferSource: () => AudioBufferSource,
@@ -33,6 +32,7 @@ var Metamuxer = (() => {
     BaseChunkDrain: () => BaseChunkDrain,
     BaseMediaFrameDrain: () => BaseMediaFrameDrain,
     BlobSource: () => BlobSource,
+    BufferSource: () => BufferSource,
     CanvasDrain: () => CanvasDrain,
     CanvasSource: () => CanvasSource,
     EncodedAudioChunkDrain: () => EncodedAudioChunkDrain,
@@ -259,6 +259,11 @@ var Metamuxer = (() => {
       yield* source[Symbol.asyncIterator]();
     }
   };
+  var validateAnyIterable = (iterable) => {
+    if (!(Symbol.iterator in iterable) && !(Symbol.asyncIterator in iterable)) {
+      throw new TypeError("Argument must be an iterable or async iterable.");
+    }
+  };
 
   // src/subtitles.ts
   var cueBlockHeaderRegex = /(?:(.+?)\n)?((?:\d{2}:)?\d{2}:\d{2}.\d{3})\s+-->\s+((?:\d{2}:)?\d{2}:\d{2}.\d{3})/g;
@@ -4079,22 +4084,28 @@ ${cue.notes ?? ""}`;
       return this._sizePromise ??= this._retrieveSize();
     }
   };
-  var ArrayBufferSource = class extends Source {
+  var BufferSource = class extends Source {
     constructor(buffer) {
+      if (!(buffer instanceof ArrayBuffer) && !(buffer instanceof Uint8Array)) {
+        throw new TypeError("buffer must be an ArrayBuffer or Uint8Array.");
+      }
       super();
-      this._buffer = buffer;
+      this._bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);
     }
     /** @internal */
     async _read(start, end) {
-      return new Uint8Array(this._buffer, start, end - start);
+      return this._bytes.subarray(start, end);
     }
     /** @internal */
     async _retrieveSize() {
-      return this._buffer.byteLength;
+      return this._bytes.byteLength;
     }
   };
   var BlobSource = class extends Source {
     constructor(blob) {
+      if (!(blob instanceof Blob)) {
+        throw new TypeError("blob must be a Blob.");
+      }
       super();
       this._blob = blob;
     }
@@ -5907,6 +5918,15 @@ ${cue.notes ?? ""}`;
       this._demuxerPromise = null;
       /** @internal */
       this._format = null;
+      if (!options || typeof options !== "object") {
+        throw new TypeError("options must be an object.");
+      }
+      if (!Array.isArray(options.formats) || options.formats.some((x) => !(x instanceof InputFormat))) {
+        throw new TypeError("options.formats must be an array of InputFormat.");
+      }
+      if (!(options.source instanceof Source)) {
+        throw new TypeError("options.source must be a Source.");
+      }
       this._formats = options.formats;
       this._source = options.source;
       this._mainReader = new Reader(options.source);
@@ -5961,6 +5981,19 @@ ${cue.notes ?? ""}`;
   };
 
   // src/media-drain.ts
+  var validateChunkRetrievalOptions = (options) => {
+    if (!options || typeof options !== "object") {
+      throw new TypeError("options must be an object.");
+    }
+    if (options.metadataOnly !== void 0 && typeof options.metadataOnly !== "boolean") {
+      throw new TypeError("options.metadataOnly, when defined, must be a boolean.");
+    }
+  };
+  var validateTimestamp = (timestamp) => {
+    if (typeof timestamp !== "number" || Number.isNaN(timestamp)) {
+      throw new TypeError("timestamp must be a number.");
+    }
+  };
   var BaseChunkDrain = class {
     async *chunks(startChunk, endTimestamp = Infinity) {
       const chunkQueue = [];
@@ -6016,6 +6049,7 @@ ${cue.notes ?? ""}`;
       return structuredClone(frame);
     }
     async *mediaFramesAtTimestamps(timestamps) {
+      validateAnyIterable(timestamps);
       const timestampIterator = toAsyncIterator(timestamps);
       const timestampsOfInterest = [];
       const frameQueue = [];
@@ -6054,6 +6088,7 @@ ${cue.notes ?? ""}`;
         let lastKeyChunk = null;
         let lastChunk = null;
         for await (const timestamp of timestampIterator) {
+          validateTimestamp(timestamp);
           while (frameQueue.length + decoder.decodeQueueSize > MAX_QUEUE_SIZE) {
             ({ promise: queueDequeue, resolve: onQueueDequeue } = promiseWithResolvers());
             await queueDequeue;
@@ -6123,6 +6158,8 @@ ${cue.notes ?? ""}`;
       }
     }
     async *mediaFramesInRange(startTimestamp = 0, endTimestamp = Infinity) {
+      validateTimestamp(startTimestamp);
+      validateTimestamp(endTimestamp);
       const frameQueue = [];
       let firstFrameQueued = false;
       let lastFrame = null;
@@ -6220,27 +6257,46 @@ ${cue.notes ?? ""}`;
   };
   var EncodedVideoChunkDrain = class extends BaseChunkDrain {
     constructor(videoTrack) {
+      if (!(videoTrack instanceof InputVideoTrack)) {
+        throw new TypeError("videoTrack must be an InputVideoTrack.");
+      }
       super();
       this._videoTrack = videoTrack;
     }
     getFirstChunk(options = {}) {
+      validateChunkRetrievalOptions(options);
       return this._videoTrack._backing.getFirstChunk(options);
     }
     getChunk(timestamp, options = {}) {
+      validateTimestamp(timestamp);
+      validateChunkRetrievalOptions(options);
       return this._videoTrack._backing.getChunk(timestamp, options);
     }
     getNextChunk(chunk, options = {}) {
+      if (!(chunk instanceof EncodedVideoChunk)) {
+        throw new TypeError("chunk must be an EncodedVideoChunk.");
+      }
+      validateChunkRetrievalOptions(options);
       return this._videoTrack._backing.getNextChunk(chunk, options);
     }
     getKeyChunk(timestamp, options = {}) {
+      validateTimestamp(timestamp);
+      validateChunkRetrievalOptions(options);
       return this._videoTrack._backing.getKeyChunk(timestamp, options);
     }
     getNextKeyChunk(chunk, options = {}) {
+      if (!(chunk instanceof EncodedVideoChunk)) {
+        throw new TypeError("chunk must be an EncodedVideoChunk.");
+      }
+      validateChunkRetrievalOptions(options);
       return this._videoTrack._backing.getNextKeyChunk(chunk, options);
     }
   };
   var VideoFrameDrain = class extends BaseMediaFrameDrain {
     constructor(videoTrack) {
+      if (!(videoTrack instanceof InputVideoTrack)) {
+        throw new TypeError("videoTrack must be an InputVideoTrack.");
+      }
       super();
       /** @internal */
       this._decoderConfig = null;
@@ -6261,6 +6317,7 @@ ${cue.notes ?? ""}`;
       return new EncodedVideoChunkDrain(this._videoTrack);
     }
     async getFrame(timestamp) {
+      validateTimestamp(timestamp);
       for await (const frame of this.mediaFramesAtTimestamps([timestamp])) {
         return frame;
       }
@@ -6275,6 +6332,18 @@ ${cue.notes ?? ""}`;
   };
   var CanvasDrain = class {
     constructor(videoTrack, dimensions) {
+      if (!(videoTrack instanceof InputVideoTrack)) {
+        throw new TypeError("videoTrack must be an InputVideoTrack.");
+      }
+      if (dimensions && typeof dimensions !== "object") {
+        throw new TypeError("dimensions, when defined, must be an object.");
+      }
+      if (dimensions && (!Number.isInteger(dimensions.width) || dimensions.width <= 0)) {
+        throw new TypeError("dimensions.width must be a positive integer.");
+      }
+      if (dimensions && (!Number.isInteger(dimensions.height) || dimensions.height <= 0)) {
+        throw new TypeError("dimensions.height must be a positive integer.");
+      }
       this._videoTrack = videoTrack;
       this._dimensions = dimensions;
       this._videoFrameDrain = new VideoFrameDrain(videoTrack);
@@ -6303,6 +6372,7 @@ ${cue.notes ?? ""}`;
       return result;
     }
     async getCanvas(timestamp) {
+      validateTimestamp(timestamp);
       const frame = await this._videoFrameDrain.getFrame(timestamp);
       return frame && this._videoFrameToWrappedCanvas(frame);
     }
@@ -6319,27 +6389,46 @@ ${cue.notes ?? ""}`;
   };
   var EncodedAudioChunkDrain = class extends BaseChunkDrain {
     constructor(audioTrack) {
+      if (!(audioTrack instanceof InputAudioTrack)) {
+        throw new TypeError("audioTrack must be an InputAudioTrack.");
+      }
       super();
       this._audioTrack = audioTrack;
     }
     getFirstChunk(options = {}) {
+      validateChunkRetrievalOptions(options);
       return this._audioTrack._backing.getFirstChunk(options);
     }
     getChunk(timestamp, options = {}) {
+      validateTimestamp(timestamp);
+      validateChunkRetrievalOptions(options);
       return this._audioTrack._backing.getChunk(timestamp, options);
     }
     getNextChunk(chunk, options = {}) {
+      if (!(chunk instanceof EncodedAudioChunk)) {
+        throw new TypeError("chunk must be an EncodedAudioChunk.");
+      }
+      validateChunkRetrievalOptions(options);
       return this._audioTrack._backing.getNextChunk(chunk, options);
     }
     getKeyChunk(timestamp, options = {}) {
+      validateTimestamp(timestamp);
+      validateChunkRetrievalOptions(options);
       return this._audioTrack._backing.getKeyChunk(timestamp, options);
     }
     getNextKeyChunk(chunk, options = {}) {
+      if (!(chunk instanceof EncodedAudioChunk)) {
+        throw new TypeError("chunk must be an EncodedAudioChunk.");
+      }
+      validateChunkRetrievalOptions(options);
       return this._audioTrack._backing.getNextKeyChunk(chunk, options);
     }
   };
   var AudioDataDrain = class extends BaseMediaFrameDrain {
     constructor(audioTrack) {
+      if (!(audioTrack instanceof InputAudioTrack)) {
+        throw new TypeError("audioTrack must be an InputAudioTrack.");
+      }
       super();
       /** @internal */
       this._decoderConfig = null;
@@ -6360,6 +6449,7 @@ ${cue.notes ?? ""}`;
       return new EncodedAudioChunkDrain(this._audioTrack);
     }
     async getData(timestamp) {
+      validateTimestamp(timestamp);
       for await (const data of this.mediaFramesAtTimestamps([timestamp])) {
         return data;
       }
@@ -6374,6 +6464,9 @@ ${cue.notes ?? ""}`;
   };
   var AudioBufferDrain = class {
     constructor(audioTrack) {
+      if (!(audioTrack instanceof InputAudioTrack)) {
+        throw new TypeError("audioTrack must be an InputAudioTrack.");
+      }
       this._audioDataDrain = new AudioDataDrain(audioTrack);
     }
     /** @internal */
@@ -6398,6 +6491,7 @@ ${cue.notes ?? ""}`;
       return result;
     }
     async getBuffer(timestamp) {
+      validateTimestamp(timestamp);
       const data = await this._audioDataDrain.getData(timestamp);
       return data && this._audioDataToWrappedArrayBuffer(data);
     }

dist/metamuxer.mjs

@@ -185,6 +185,11 @@ var toAsyncIterator = async function* (source) {
     yield* source[Symbol.asyncIterator]();
   }
 };
+var validateAnyIterable = (iterable) => {
+  if (!(Symbol.iterator in iterable) && !(Symbol.asyncIterator in iterable)) {
+    throw new TypeError("Argument must be an iterable or async iterable.");
+  }
+};
 
 // src/subtitles.ts
 var cueBlockHeaderRegex = /(?:(.+?)\n)?((?:\d{2}:)?\d{2}:\d{2}.\d{3})\s+-->\s+((?:\d{2}:)?\d{2}:\d{2}.\d{3})/g;
@@ -4005,22 +4010,28 @@ var Source = class {
     return this._sizePromise ??= this._retrieveSize();
   }
 };
-var ArrayBufferSource = class extends Source {
+var BufferSource = class extends Source {
   constructor(buffer) {
+    if (!(buffer instanceof ArrayBuffer) && !(buffer instanceof Uint8Array)) {
+      throw new TypeError("buffer must be an ArrayBuffer or Uint8Array.");
+    }
     super();
-    this._buffer = buffer;
+    this._bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);
   }
   /** @internal */
   async _read(start, end) {
-    return new Uint8Array(this._buffer, start, end - start);
+    return this._bytes.subarray(start, end);
   }
   /** @internal */
   async _retrieveSize() {
-    return this._buffer.byteLength;
+    return this._bytes.byteLength;
   }
 };
 var BlobSource = class extends Source {
   constructor(blob) {
+    if (!(blob instanceof Blob)) {
+      throw new TypeError("blob must be a Blob.");
+    }
     super();
     this._blob = blob;
   }
@@ -5833,6 +5844,15 @@ var Input = class {
     this._demuxerPromise = null;
     /** @internal */
     this._format = null;
+    if (!options || typeof options !== "object") {
+      throw new TypeError("options must be an object.");
+    }
+    if (!Array.isArray(options.formats) || options.formats.some((x) => !(x instanceof InputFormat))) {
+      throw new TypeError("options.formats must be an array of InputFormat.");
+    }
+    if (!(options.source instanceof Source)) {
+      throw new TypeError("options.source must be a Source.");
+    }
     this._formats = options.formats;
     this._source = options.source;
     this._mainReader = new Reader(options.source);
@@ -5887,6 +5907,19 @@ var Input = class {
 };
 
 // src/media-drain.ts
+var validateChunkRetrievalOptions = (options) => {
+  if (!options || typeof options !== "object") {
+    throw new TypeError("options must be an object.");
+  }
+  if (options.metadataOnly !== void 0 && typeof options.metadataOnly !== "boolean") {
+    throw new TypeError("options.metadataOnly, when defined, must be a boolean.");
+  }
+};
+var validateTimestamp = (timestamp) => {
+  if (typeof timestamp !== "number" || Number.isNaN(timestamp)) {
+    throw new TypeError("timestamp must be a number.");
+  }
+};
 var BaseChunkDrain = class {
   async *chunks(startChunk, endTimestamp = Infinity) {
     const chunkQueue = [];
@@ -5942,6 +5975,7 @@ var BaseMediaFrameDrain = class {
     return structuredClone(frame);
   }
   async *mediaFramesAtTimestamps(timestamps) {
+    validateAnyIterable(timestamps);
     const timestampIterator = toAsyncIterator(timestamps);
     const timestampsOfInterest = [];
     const frameQueue = [];
@@ -5980,6 +6014,7 @@ var BaseMediaFrameDrain = class {
       let lastKeyChunk = null;
       let lastChunk = null;
       for await (const timestamp of timestampIterator) {
+        validateTimestamp(timestamp);
         while (frameQueue.length + decoder.decodeQueueSize > MAX_QUEUE_SIZE) {
           ({ promise: queueDequeue, resolve: onQueueDequeue } = promiseWithResolvers());
           await queueDequeue;
@@ -6049,6 +6084,8 @@ var BaseMediaFrameDrain = class {
     }
   }
   async *mediaFramesInRange(startTimestamp = 0, endTimestamp = Infinity) {
+    validateTimestamp(startTimestamp);
+    validateTimestamp(endTimestamp);
     const frameQueue = [];
     let firstFrameQueued = false;
     let lastFrame = null;
@@ -6146,27 +6183,46 @@ var BaseMediaFrameDrain = class {
 };
 var EncodedVideoChunkDrain = class extends BaseChunkDrain {
   constructor(videoTrack) {
+    if (!(videoTrack instanceof InputVideoTrack)) {
+      throw new TypeError("videoTrack must be an InputVideoTrack.");
+    }
     super();
     this._videoTrack = videoTrack;
   }
   getFirstChunk(options = {}) {
+    validateChunkRetrievalOptions(options);
     return this._videoTrack._backing.getFirstChunk(options);
   }
   getChunk(timestamp, options = {}) {
+    validateTimestamp(timestamp);
+    validateChunkRetrievalOptions(options);
     return this._videoTrack._backing.getChunk(timestamp, options);
   }
   getNextChunk(chunk, options = {}) {
+    if (!(chunk instanceof EncodedVideoChunk)) {
+      throw new TypeError("chunk must be an EncodedVideoChunk.");
+    }
+    validateChunkRetrievalOptions(options);
     return this._videoTrack._backing.getNextChunk(chunk, options);
   }
   getKeyChunk(timestamp, options = {}) {
+    validateTimestamp(timestamp);
+    validateChunkRetrievalOptions(options);
     return this._videoTrack._backing.getKeyChunk(timestamp, options);
   }
   getNextKeyChunk(chunk, options = {}) {
+    if (!(chunk instanceof EncodedVideoChunk)) {
+      throw new TypeError("chunk must be an EncodedVideoChunk.");
+    }
+    validateChunkRetrievalOptions(options);
     return this._videoTrack._backing.getNextKeyChunk(chunk, options);
   }
 };
 var VideoFrameDrain = class extends BaseMediaFrameDrain {
   constructor(videoTrack) {
+    if (!(videoTrack instanceof InputVideoTrack)) {
+      throw new TypeError("videoTrack must be an InputVideoTrack.");
+    }
     super();
     /** @internal */
     this._decoderConfig = null;
@@ -6187,6 +6243,7 @@ var VideoFrameDrain = class extends BaseMediaFrameDrain {
     return new EncodedVideoChunkDrain(this._videoTrack);
   }
   async getFrame(timestamp) {
+    validateTimestamp(timestamp);
     for await (const frame of this.mediaFramesAtTimestamps([timestamp])) {
       return frame;
     }
@@ -6201,6 +6258,18 @@ var VideoFrameDrain = class extends BaseMediaFrameDrain {
 };
 var CanvasDrain = class {
   constructor(videoTrack, dimensions) {
+    if (!(videoTrack instanceof InputVideoTrack)) {
+      throw new TypeError("videoTrack must be an InputVideoTrack.");
+    }
+    if (dimensions && typeof dimensions !== "object") {
+      throw new TypeError("dimensions, when defined, must be an object.");
+    }
+    if (dimensions && (!Number.isInteger(dimensions.width) || dimensions.width <= 0)) {
+      throw new TypeError("dimensions.width must be a positive integer.");
+    }
+    if (dimensions && (!Number.isInteger(dimensions.height) || dimensions.height <= 0)) {
+      throw new TypeError("dimensions.height must be a positive integer.");
+    }
     this._videoTrack = videoTrack;
     this._dimensions = dimensions;
     this._videoFrameDrain = new VideoFrameDrain(videoTrack);
@@ -6229,6 +6298,7 @@ var CanvasDrain = class {
     return result;
   }
   async getCanvas(timestamp) {
+    validateTimestamp(timestamp);
     const frame = await this._videoFrameDrain.getFrame(timestamp);
     return frame && this._videoFrameToWrappedCanvas(frame);
   }
@@ -6245,27 +6315,46 @@ var CanvasDrain = class {
 };
 var EncodedAudioChunkDrain = class extends BaseChunkDrain {
   constructor(audioTrack) {
+    if (!(audioTrack instanceof InputAudioTrack)) {
+      throw new TypeError("audioTrack must be an InputAudioTrack.");
+    }
     super();
     this._audioTrack = audioTrack;
   }
   getFirstChunk(options = {}) {
+    validateChunkRetrievalOptions(options);
     return this._audioTrack._backing.getFirstChunk(options);
   }
   getChunk(timestamp, options = {}) {
+    validateTimestamp(timestamp);
+    validateChunkRetrievalOptions(options);
     return this._audioTrack._backing.getChunk(timestamp, options);
   }
   getNextChunk(chunk, options = {}) {
+    if (!(chunk instanceof EncodedAudioChunk)) {
+      throw new TypeError("chunk must be an EncodedAudioChunk.");
+    }
+    validateChunkRetrievalOptions(options);
     return this._audioTrack._backing.getNextChunk(chunk, options);
   }
   getKeyChunk(timestamp, options = {}) {
+    validateTimestamp(timestamp);
+    validateChunkRetrievalOptions(options);
     return this._audioTrack._backing.getKeyChunk(timestamp, options);
   }
   getNextKeyChunk(chunk, options = {}) {
+    if (!(chunk instanceof EncodedAudioChunk)) {
+      throw new TypeError("chunk must be an EncodedAudioChunk.");
+    }
+    validateChunkRetrievalOptions(options);
     return this._audioTrack._backing.getNextKeyChunk(chunk, options);
   }
 };
 var AudioDataDrain = class extends BaseMediaFrameDrain {
   constructor(audioTrack) {
+    if (!(audioTrack instanceof InputAudioTrack)) {
+      throw new TypeError("audioTrack must be an InputAudioTrack.");
+    }
     super();
     /** @internal */
     this._decoderConfig = null;
@@ -6286,6 +6375,7 @@ var AudioDataDrain = class extends BaseMediaFrameDrain {
     return new EncodedAudioChunkDrain(this._audioTrack);
   }
   async getData(timestamp) {
+    validateTimestamp(timestamp);
     for await (const data of this.mediaFramesAtTimestamps([timestamp])) {
       return data;
     }
@@ -6300,6 +6390,9 @@ var AudioDataDrain = class extends BaseMediaFrameDrain {
 };
 var AudioBufferDrain = class {
   constructor(audioTrack) {
+    if (!(audioTrack instanceof InputAudioTrack)) {
+      throw new TypeError("audioTrack must be an InputAudioTrack.");
+    }
     this._audioDataDrain = new AudioDataDrain(audioTrack);
   }
   /** @internal */
@@ -6324,6 +6417,7 @@ var AudioBufferDrain = class {
     return result;
   }
   async getBuffer(timestamp) {
+    validateTimestamp(timestamp);
     const data = await this._audioDataDrain.getData(timestamp);
     return data && this._audioDataToWrappedArrayBuffer(data);
   }
@@ -6341,7 +6435,6 @@ var AudioBufferDrain = class {
 export {
   ALL_FORMATS,
   AUDIO_CODECS,
-  ArrayBufferSource,
   ArrayBufferTarget,
   AudioBufferDrain,
   AudioBufferSource,
@@ -6351,6 +6444,7 @@ export {
   BaseChunkDrain,
   BaseMediaFrameDrain,
   BlobSource,
+  BufferSource,
   CanvasDrain,
   CanvasSource,
   EncodedAudioChunkDrain,

src/index.ts

@@ -36,7 +36,7 @@ export {
 } from './codec';
 export { Target, ArrayBufferTarget, StreamTarget, StreamTargetChunk, StreamTargetOptions } from './target';
 export { Rotation, TransformationMatrix, AnyIterable } from './misc';
-export { Source, ArrayBufferSource, BlobSource } from './source';
+export { Source, BufferSource, BlobSource } from './source';
 export {
 	InputFormat,
 	IsobmffInputFormat,

src/input-track.ts

@@ -58,7 +58,7 @@ export class InputVideoTrack extends InputTrack {
 		this._backing = backing;
 	}
 
-	getCodec() {
+	getCodec(): Promise<VideoCodec> {
 		return this._backing.getCodec();
 	}
 
@@ -118,7 +118,7 @@ export class InputAudioTrack extends InputTrack {
 		this._backing = backing;
 	}
 
-	getCodec() {
+	getCodec(): Promise<AudioCodec> {
 		return this._backing.getCodec();
 	}
 

src/input.ts

@@ -24,6 +24,16 @@ export class Input {
 	_format: InputFormat | null = null;
 
 	constructor(options: InputOptions) {
+		if (!options || typeof options !== 'object') {
+			throw new TypeError('options must be an object.');
+		}
+		if (!Array.isArray(options.formats) || options.formats.some(x => !(x instanceof InputFormat))) {
+			throw new TypeError('options.formats must be an array of InputFormat.');
+		}
+		if (!(options.source instanceof Source)) {
+			throw new TypeError('options.source must be a Source.');
+		}
+
 		this._formats = options.formats;
 		this._source = options.source;
 		this._mainReader = new Reader(options.source);

src/media-drain.ts

@@ -1,11 +1,26 @@
 import { InputAudioTrack, InputVideoTrack } from './input-track';
-import { AnyIterable, assert, promiseWithResolvers, toAsyncIterator } from './misc';
+import { AnyIterable, assert, promiseWithResolvers, toAsyncIterator, validateAnyIterable } from './misc';
 
 /** @public */
 export type ChunkRetrievalOptions = {
 	metadataOnly?: boolean;
 };
 
+const validateChunkRetrievalOptions = (options: ChunkRetrievalOptions) => {
+	if (!options || typeof options !== 'object') {
+		throw new TypeError('options must be an object.');
+	}
+	if (options.metadataOnly !== undefined && typeof options.metadataOnly !== 'boolean') {
+		throw new TypeError('options.metadataOnly, when defined, must be a boolean.');
+	}
+};
+
+const validateTimestamp = (timestamp: number) => {
+	if (typeof timestamp !== 'number' || Number.isNaN(timestamp)) {
+		throw new TypeError('timestamp must be a number.'); // It can be non-finite, that's fine
+	}
+};
+
 /** @public */
 export abstract class BaseChunkDrain<Chunk extends EncodedVideoChunk | EncodedAudioChunk> {
 	abstract getFirstChunk(options?: ChunkRetrievalOptions): Promise<Chunk | null>;
@@ -93,6 +108,7 @@ export abstract class BaseMediaFrameDrain<
 	}
 
 	protected async* mediaFramesAtTimestamps(timestamps: AnyIterable<number>) {
+		validateAnyIterable(timestamps);
 		const timestampIterator = toAsyncIterator(timestamps);
 		const timestampsOfInterest: number[] = [];
 
@@ -141,6 +157,8 @@ export abstract class BaseMediaFrameDrain<
 			let lastChunk: Chunk | null = null;
 
 			for await (const timestamp of timestampIterator) {
+				validateTimestamp(timestamp);
+
 				while (frameQueue.length + decoder.decodeQueueSize > MAX_QUEUE_SIZE) {
 					({ promise: queueDequeue, resolve: onQueueDequeue } = promiseWithResolvers());
 					await queueDequeue;
@@ -230,6 +248,9 @@ export abstract class BaseMediaFrameDrain<
 	}
 
 	protected async* mediaFramesInRange(startTimestamp = 0, endTimestamp = Infinity) {
+		validateTimestamp(startTimestamp);
+		validateTimestamp(endTimestamp);
+
 		const frameQueue: MediaFrame[] = [];
 		let firstFrameQueued = false;
 		let lastFrame: MediaFrame | null = null;
@@ -368,28 +389,45 @@ export class EncodedVideoChunkDrain extends BaseChunkDrain<EncodedVideoChunk> {
 	_videoTrack: InputVideoTrack;
 
 	constructor(videoTrack: InputVideoTrack) {
+		if (!(videoTrack instanceof InputVideoTrack)) {
+			throw new TypeError('videoTrack must be an InputVideoTrack.');
+		}
+
 		super();
 
 		this._videoTrack = videoTrack;
 	}
 
 	getFirstChunk(options: ChunkRetrievalOptions = {}) {
+		validateChunkRetrievalOptions(options);
 		return this._videoTrack._backing.getFirstChunk(options);
 	}
 
 	getChunk(timestamp: number, options: ChunkRetrievalOptions = {}) {
+		validateTimestamp(timestamp);
+		validateChunkRetrievalOptions(options);
 		return this._videoTrack._backing.getChunk(timestamp, options);
 	}
 
 	getNextChunk(chunk: EncodedVideoChunk, options: ChunkRetrievalOptions = {}) {
+		if (!(chunk instanceof EncodedVideoChunk)) {
+			throw new TypeError('chunk must be an EncodedVideoChunk.');
+		}
+		validateChunkRetrievalOptions(options);
 		return this._videoTrack._backing.getNextChunk(chunk, options);
 	}
 
 	getKeyChunk(timestamp: number, options: ChunkRetrievalOptions = {}) {
+		validateTimestamp(timestamp);
+		validateChunkRetrievalOptions(options);
 		return this._videoTrack._backing.getKeyChunk(timestamp, options);
 	}
 
 	getNextKeyChunk(chunk: EncodedVideoChunk, options: ChunkRetrievalOptions = {}) {
+		if (!(chunk instanceof EncodedVideoChunk)) {
+			throw new TypeError('chunk must be an EncodedVideoChunk.');
+		}
+		validateChunkRetrievalOptions(options);
 		return this._videoTrack._backing.getNextKeyChunk(chunk, options);
 	}
 }
@@ -402,6 +440,10 @@ export class VideoFrameDrain extends BaseMediaFrameDrain<EncodedVideoChunk, Vide
 	_decoderConfig: VideoDecoderConfig | null = null;
 
 	constructor(videoTrack: InputVideoTrack) {
+		if (!(videoTrack instanceof InputVideoTrack)) {
+			throw new TypeError('videoTrack must be an InputVideoTrack.');
+		}
+
 		super();
 
 		this._videoTrack = videoTrack;
@@ -426,6 +468,8 @@ export class VideoFrameDrain extends BaseMediaFrameDrain<EncodedVideoChunk, Vide
 	}
 
 	async getFrame(timestamp: number) {
+		validateTimestamp(timestamp);
+
 		for await (const frame of this.mediaFramesAtTimestamps([timestamp])) {
 			return frame;
 		}
@@ -458,6 +502,19 @@ export class CanvasDrain {
 	_videoFrameDrain: VideoFrameDrain;
 
 	constructor(videoTrack: InputVideoTrack, dimensions?: { width: number; height: number }) {
+		if (!(videoTrack instanceof InputVideoTrack)) {
+			throw new TypeError('videoTrack must be an InputVideoTrack.');
+		}
+		if (dimensions && typeof dimensions !== 'object') {
+			throw new TypeError('dimensions, when defined, must be an object.');
+		}
+		if (dimensions && (!Number.isInteger(dimensions.width) || dimensions.width <= 0)) {
+			throw new TypeError('dimensions.width must be a positive integer.');
+		}
+		if (dimensions && (!Number.isInteger(dimensions.height) || dimensions.height <= 0)) {
+			throw new TypeError('dimensions.height must be a positive integer.');
+		}
+
 		this._videoTrack = videoTrack;
 		this._dimensions = dimensions;
 		this._videoFrameDrain = new VideoFrameDrain(videoTrack);
@@ -495,6 +552,8 @@ export class CanvasDrain {
 	}
 
 	async getCanvas(timestamp: number) {
+		validateTimestamp(timestamp);
+
 		const frame = await this._videoFrameDrain.getFrame(timestamp);
 		return frame && this._videoFrameToWrappedCanvas(frame);
 	}
@@ -518,28 +577,45 @@ export class EncodedAudioChunkDrain extends BaseChunkDrain<EncodedAudioChunk> {
 	_audioTrack: InputAudioTrack;
 
 	constructor(audioTrack: InputAudioTrack) {
+		if (!(audioTrack instanceof InputAudioTrack)) {
+			throw new TypeError('audioTrack must be an InputAudioTrack.');
+		}
+
 		super();
 
 		this._audioTrack = audioTrack;
 	}
 
 	getFirstChunk(options: ChunkRetrievalOptions = {}) {
+		validateChunkRetrievalOptions(options);
 		return this._audioTrack._backing.getFirstChunk(options);
 	}
 
 	getChunk(timestamp: number, options: ChunkRetrievalOptions = {}) {
+		validateTimestamp(timestamp);
+		validateChunkRetrievalOptions(options);
 		return this._audioTrack._backing.getChunk(timestamp, options);
 	}
 
 	getNextChunk(chunk: EncodedAudioChunk, options: ChunkRetrievalOptions = {}) {
+		if (!(chunk instanceof EncodedAudioChunk)) {
+			throw new TypeError('chunk must be an EncodedAudioChunk.');
+		}
+		validateChunkRetrievalOptions(options);
 		return this._audioTrack._backing.getNextChunk(chunk, options);
 	}
 
 	getKeyChunk(timestamp: number, options: ChunkRetrievalOptions = {}) {
+		validateTimestamp(timestamp);
+		validateChunkRetrievalOptions(options);
 		return this._audioTrack._backing.getKeyChunk(timestamp, options);
 	}
 
 	getNextKeyChunk(chunk: EncodedAudioChunk, options: ChunkRetrievalOptions = {}) {
+		if (!(chunk instanceof EncodedAudioChunk)) {
+			throw new TypeError('chunk must be an EncodedAudioChunk.');
+		}
+		validateChunkRetrievalOptions(options);
 		return this._audioTrack._backing.getNextKeyChunk(chunk, options);
 	}
 }
@@ -552,6 +628,10 @@ export class AudioDataDrain extends BaseMediaFrameDrain<EncodedAudioChunk, Audio
 	_decoderConfig: AudioDecoderConfig | null = null;
 
 	constructor(audioTrack: InputAudioTrack) {
+		if (!(audioTrack instanceof InputAudioTrack)) {
+			throw new TypeError('audioTrack must be an InputAudioTrack.');
+		}
+
 		super();
 
 		this._audioTrack = audioTrack;
@@ -576,6 +656,8 @@ export class AudioDataDrain extends BaseMediaFrameDrain<EncodedAudioChunk, Audio
 	}
 
 	async getData(timestamp: number) {
+		validateTimestamp(timestamp);
+
 		for await (const data of this.mediaFramesAtTimestamps([timestamp])) {
 			return data;
 		}
@@ -603,6 +685,10 @@ export class AudioBufferDrain {
 	_audioDataDrain: AudioDataDrain;
 
 	constructor(audioTrack: InputAudioTrack) {
+		if (!(audioTrack instanceof InputAudioTrack)) {
+			throw new TypeError('audioTrack must be an InputAudioTrack.');
+		}
+
 		this._audioDataDrain = new AudioDataDrain(audioTrack);
 	}
 
@@ -635,6 +721,8 @@ export class AudioBufferDrain {
 	}
 
 	async getBuffer(timestamp: number) {
+		validateTimestamp(timestamp);
+
 		const data = await this._audioDataDrain.getData(timestamp);
 		return data && this._audioDataToWrappedArrayBuffer(data);
 	}

src/misc.ts

@@ -239,3 +239,9 @@ export const toAsyncIterator = async function* <T>(source: AnyIterable<T>): Asyn
 		yield* source[Symbol.asyncIterator]();
 	}
 };
+
+export const validateAnyIterable = (iterable: AnyIterable<unknown>) => {
+	if (!(Symbol.iterator in iterable) && !(Symbol.asyncIterator in iterable)) {
+		throw new TypeError('Argument must be an iterable or async iterable.');
+	}
+};

src/source.ts

@@ -15,24 +15,28 @@ export abstract class Source {
 }
 
 /** @public */
-export class ArrayBufferSource extends Source {
+export class BufferSource extends Source {
 	/** @internal */
-	_buffer: ArrayBuffer;
+	_bytes: Uint8Array;
+
+	constructor(buffer: ArrayBuffer | Uint8Array) {
+		if (!(buffer instanceof ArrayBuffer) && !(buffer instanceof Uint8Array)) {
+			throw new TypeError('buffer must be an ArrayBuffer or Uint8Array.');
+		}
 
-	constructor(buffer: ArrayBuffer) {
 		super();
 
-		this._buffer = buffer;
+		this._bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);
 	}
 
 	/** @internal */
 	override async _read(start: number, end: number) {
-		return new Uint8Array(this._buffer, start, end - start);
+		return this._bytes.subarray(start, end);
 	}
 
 	/** @internal */
 	override async _retrieveSize() {
-		return this._buffer.byteLength;
+		return this._bytes.byteLength;
 	}
 }
 
@@ -42,6 +46,10 @@ export class BlobSource extends Source {
 	_blob: Blob;
 
 	constructor(blob: Blob) {
+		if (!(blob instanceof Blob)) {
+			throw new TypeError('blob must be a Blob.');
+		}
+
 		super();
 
 		this._blob = blob;