googg's Introduction

GoOGG

These are golang bindings and a wrapper around libOGG.

Usage

Use go get -u to download and install the prebuilt package.

go get -u github.com/ilya2ik/googg

Example for usage

package main

import (
    "io"
    "os"

    OGG "github.com/ilya2ik/googg"
)

func check(e error) {
    if e != nil {
        panic(e)
    }
}

const READ_CHUNK = 1024
const BUF_SIZE = 4096
const OGG_CHUNK = 256

func main() {
    // open file main.go to encode it in ogg format
    f, err := os.Open("main.go")
    check(err)

    // create new file main.go.ogg to save encoded data
    sf, err := os.Create("main.go.ogg")
    check(err)

    // generate ogg encoder (writing encoded data in fragments of data no larger than OGG_CHUNK)
    enc, err := OGG.NewEncoder(OGG_CHUNK, sf)
    check(err)

    // write header to the output file
    enc.SetWriteHeaderFunc(func(id int) ([]byte, error) {
        seq := [...]byte{0xff, 0x00, 0xff, 0xaa}
        return seq[0:], nil
    })
    check(enc.WriteHeader(0))

    // read data from file, encode and save to the output file
    buf := make([]byte, 0, READ_CHUNK)
    for true {
        n, err := f.Read(buf[0:READ_CHUNK])
        if err == io.EOF {
            break
        }
        check(err)

        _, err = enc.Write(buf[0:n])
        check(err)
    }
    enc.Close()
    sf.Close()
    f.Close()

    // open file main.go.ogg to read encoded data from
    f, err = os.Open("main.go.ogg")
    check(err)
    defer f.Close()

    // create new file main.out to save decoded data to
    sf, err = os.Create("main.out")
    check(err)
    defer sf.Close()

    // generate ogg decoder
    dec, err := OGG.NewDecoder(BUF_SIZE, f)
    check(err)
    defer dec.Close()

    // read header from the encoded file
    check(dec.ReadHeaders(1))

    // read data from file, decode and save to the output file
    for true {
        n, err := dec.Read(buf[0:READ_CHUNK])
        if err == io.EOF {
            break
        }
        check(err)

        _, err = sf.Write(buf[0:n])
        check(err)
    }
}

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