mediabunny/api_sketch.ts

abstract class Target {

}

class ArrayBufferTarget extends Target {

}

class StreamTarget extends Target {

}

abstract class OutputFormat {
	
}

class Mp4OutputFormat extends OutputFormat {
	constructor(options: {
		fastStart: false | 'in-memory' | 'fragmented' | {
			expectedVideoChunks?: number,
			expectedAudioChunks?: number
		},
	}) {
		super();
	}
}

class WebMOutputFormat extends OutputFormat {

}

class MkvOutputFormat extends OutputFormat {

}

type OutputOptions = {
	format: OutputFormat,
	target: Target
};

class Output {
	constructor(options: OutputOptions) {

	}

	addVideoTrack(source: VideoSource) {

	}

	addAudioTrack(source: AudioSource) {

	}

	start() {
		
	}

	async finalize() {

	}
}

abstract class InputSource {

}

class InputFormat {
	constructor(format: string) {}
}

const MP4_INPUT_FORMAT = new InputFormat('mp4');
const WEB_M_INPUT_FORMAT = new InputFormat('webm');
const MKV_INPUT_FORMAT = new InputFormat('mkv');

type InputOptions = {
	formats: InputFormat[],
	source: InputSource
};

class Input {
	constructor(options: InputOptions) {

	}
}

abstract class VideoSource {

}

abstract class AudioSource {
	
}

type VideoCodecConfig = {
	codec: 'avc' | 'hevc' | 'vp8' | 'vp9' | 'av1',
	bitrate: number 
};

type AudioCodecConfig = {
	codec: 'aac' | 'opus' | 'vorbis',
	bitrate: number
};

class VideoFrameSource extends VideoSource {
	constructor(codecConfig: VideoCodecConfig) {
		super();
	}

	digest(videoFrame: VideoFrame) {
		
	}
}

class CanvasSource extends VideoSource {
	constructor(canvas: HTMLCanvasElement, codecConfig: VideoCodecConfig) {
		super();
	}

	digest(timestamp: number) {

	}
}

class MediaStreamTrackVideoSource extends VideoSource {
	constructor(track: MediaStreamTrack, codecConfig: VideoCodecConfig) {
		super();
	}
}

class AudioDataSource extends AudioSource {
	constructor(audioData: AudioData, codecConfig: AudioCodecConfig) {
		super();
	}
}

class AudioBufferSource extends AudioSource {
	constructor(audioBuffer: AudioBuffer, codecConfig: AudioCodecConfig) {
		super();
	}
}

class MediaStreamTrackAudioSource extends AudioSource {
	constructor(track: MediaStreamTrack, codecConfig: AudioCodecConfig) {
		super();
	}
}

let output = new Output({
	format: new Mp4OutputFormat({
		fastStart: false
	}),
	target: new ArrayBufferTarget()
});

let source = new CanvasSource(document.createElement('canvas'), {
	codec: 'avc',
	bitrate: 1e6
});

output.addVideoTrack(source);

output.start();

source.digest(0)
source.digest(1)
source.digest(2)
source.digest(3)

output.finalize()