node-ogg-packet's Introduction

node-ogg-packet

Manually construct `ogg_packet` struct instances

This module lets you construct your own ogg_packet struct instances using JavaScript and Buffers. You'll most likely not need to use this module for any practical purposes, but it is useful for testing purposes.

The more common way to get proper ogg_packet structs is via a decoded OGG file and node-ogg's ogg.Decoder class, or one of the codec's encoder classes like node-vorbis' vorbis.Encoder class.

Installation

$ npm install ogg-packet

Example

var ogg_packet = require('ogg-packet');

// create an `ogg_packet` struct instance
var packet = new ogg_packet();

// the contents of the "packet"
var buf = new Buffer('hello world');
packet.packet = buf;
packet.bytes = buf.length;

// this will be the first packet in the ogg stream
packet.b_o_s = 1;

// there will be more `ogg_packet`s after this one in the ogg stream
packet.e_o_s = 0;

// the "granulepos" is a time-constant value used by the codec decoder
packet.granulepos = 12345;

// the "packetno" should increment by one for each packet in the ogg stream
packet.packetno = 0;

// now send the packet off to an `ogg.Encoder` or
// a codec-specific decoder like `vorbis.Decoder`...
stream.packetin(packet.buffer, function (err) { /* ... */ });

API

ogg_packet class

A ref-struct class that mirrors the ogg_packet fields in the ogg.h file.

typedef struct {
  unsigned char *packet;
  long  bytes;
  long  b_o_s;
  long  e_o_s;
  ogg_int64_t  granulepos;
  ogg_int64_t  packetno;
} ogg_packet;

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