42wim/matterbridge

package bmumble

import (
    "fmt"

    "layeh.com/gumble/gumble"
)

// This is a dummy implementation of a Gumble audio codec which claims
// to implement Opus, but does not actually do anything.  This serves
// as a workaround until https://github.com/layeh/gumble/pull/61 is
// merged.
// See https://github.com/42wim/matterbridge/issues/1750 for details.

const (
    audioCodecIDOpus = 4
)

func registerNullCodecAsOpus() {
    codec := &NullCodec{
        encoder: &NullAudioEncoder{},
        decoder: &NullAudioDecoder{},
    }
    gumble.RegisterAudioCodec(audioCodecIDOpus, codec)
}

type NullCodec struct {
    encoder *NullAudioEncoder
    decoder *NullAudioDecoder
}

func (c *NullCodec) ID() int {
    return audioCodecIDOpus
}

func (c *NullCodec) NewEncoder() gumble.AudioEncoder {
    e := &NullAudioEncoder{}
    return e
}

func (c *NullCodec) NewDecoder() gumble.AudioDecoder {
    d := &NullAudioDecoder{}
    return d
}

type NullAudioEncoder struct{}

func (e *NullAudioEncoder) ID() int {
    return audioCodecIDOpus
}

func (e *NullAudioEncoder) Encode(pcm []int16, mframeSize, maxDataBytes int) ([]byte, error) {
    return nil, fmt.Errorf("not implemented")
}

func (e *NullAudioEncoder) Reset() {
}

type NullAudioDecoder struct{}

func (d *NullAudioDecoder) ID() int {
    return audioCodecIDOpus
}

func (d *NullAudioDecoder) Decode(data []byte, frameSize int) ([]int16, error) {
    return nil, fmt.Errorf("not implemented")
}

func (d *NullAudioDecoder) Reset() {
}