uplink/internal/transcoders/lame/transcoder_instance.go

package lametranscoder

import (
	"github.com/viert/lame"

	"git.icedream.tech/icedream/uplink/internal"
	"git.icedream.tech/icedream/uplink/internal/transcoders"
	"git.icedream.tech/icedream/uplink/internal/transcoders/options"
)

var transcoderOptions = map[string]options.TranscoderOptionType{
	"bitrate": &options.Int64TranscoderOption{DefaultValue: 128, Min: 32, Max: 320},
	"quality": &options.Int64TranscoderOption{DefaultValue: 1, Min: 0, Max: 9},
}

type Transcoder struct{}

func (transcoder *Transcoder) Options() map[string]options.TranscoderOptionType {
	return transcoderOptions
}

func (transcoder *Transcoder) New(options map[string]interface{}) transcoders.TranscoderInstance {
	return nil
}

type TranscoderInstance struct {
	options map[string]interface{}
	*lame.LameWriter
}

func (instance *TranscoderInstance) Init(out *internal.Stream, samplerate int, channels int) {
	instance.LameWriter = lame.NewWriter(out)
	instance.LameWriter.Encoder.SetBitrate(int(instance.options["bitrate"].(int64)))
	instance.LameWriter.Encoder.SetQuality(int(instance.options["quality"].(int64)))
	instance.LameWriter.Encoder.SetInSamplerate(samplerate)
	instance.LameWriter.Encoder.SetNumChannels(channels)
	instance.LameWriter.Encoder.InitParams()
}