go-pus/opus.go

// Copyright © Go Opus Authors (see AUTHORS file)
//
// License for use of this code is detailed in the LICENSE file

package opus

/*
// Link opus using pkg-config.
#cgo pkg-config: opus
#include <opus.h>
*/
import "C"

type Application int

const (
	// Optimize encoding for VoIP
	AppVoIP = Application(C.OPUS_APPLICATION_VOIP)
	// Optimize encoding for non-voice signals like music
	AppAudio = Application(C.OPUS_APPLICATION_AUDIO)
	// Optimize encoding for low latency applications
	AppRestrictedLowdelay = Application(C.OPUS_APPLICATION_RESTRICTED_LOWDELAY)
)

const (
	xMAX_BITRATE       = 48000
	xMAX_FRAME_SIZE_MS = 60
	xMAX_FRAME_SIZE    = xMAX_BITRATE * xMAX_FRAME_SIZE_MS / 1000
	// Maximum size of an encoded frame. I actually have no idea, but this
	// looks like it's big enough.
	maxEncodedFrameSize = 10000
)

func Version() string {
	return C.GoString(C.opus_get_version_string())
}