# What Is This?
This is a collection of utilities for working with Google Video APIs, with a primary focus on UMP.

* [Video Streaming Protos](./protos/video_streaming/)
* [UMP (Parser)](./src/core/UMP.ts)
* [ServerAbrStream (SABR Client)](./src/core/ServerAbrStream.ts)
* [ChunkedDataBuffer (Buffer Manager)](./src/core/ChunkedDataBuffer.ts)

You can find usage examples [here](./examples/).

## Installation

```bash
npm install github:LuanRT/googlevideo
```

## Basic Usage

```typescript
import GoogleVideo, { PART, Protos } from 'googlevideo';

const streamingUrl = 'https://abcd--a.googlevideo.com/videoplayback?...';

const response = await fetch(streamingUrl, { method: 'POST' });

const arrayBuffer = await response.arrayBuffer();

const dataBuffer = new GoogleVideo.ChunkedDataBuffer();
dataBuffer.append(new Uint8Array(arrayBuffer));

const googUmp = new GoogleVideo.UMP(dataBuffer);

googUmp.parse((part) => {
  switch (part.type) {
    case PART.MEDIA_HEADER: {
      console.log('[MediaHeader]:', Protos.MediaHeader.decode(part.data.chunks[0]));
      break;
    }
    case PART.MEDIA: {
      const headerId = part.data.getUint8(0);
      const streamData = part.data.split(1).remainingBuffer;
      console.log('[Media]:', `Header ID: ${headerId}`, `length: ${streamData.getLength()}`);
      break;
    }
    case PART.MEDIA_END: {
      const headerId = part.data.getUint8(0);
      console.log('[MediaEnd]:', `Header ID: ${headerId}`);
      break;
    }
    default:
      console.log('Unhandled part:', part.type);
      break;
  }
});
```

For more advanced examples, including scenarios beyond just parsing responses, check out the [examples](./examples/).

## License
Distributed under the [MIT](./LICENSE) License.

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