audioformats

const (
	CODEC_OPUS = iota
	CODEC_VORBIS
	CODEC_UNKNOWN
)

const (
	// Best for most VoIP/videoconference applications where listening quality and intelligibility matter most
	OPUS_APPICATION_VOIP = 2048

	// Best for broadcast/high-fidelity application where the decoded audio should be as close as possible to the input
	OPUS_APPLICATION_AUDIO = 2049

	// Only use when lowest-achievable latency is what matters most. Voice-optimized modes cannot be used.
	OPUS_APPLICATION_RESTRICTEDLOWDELAY = 2051

	// Signal being encoded is voice
	OPUS_SIGNAL_VOICE = 3001
	// Signal being encoded is music
	OPUS_SIGNAL_MUSIC = 3002
)

const (
	// samplerate of 48kHz is opus default setting
	OPUS_SAMPLE_RATE = 48000

	// number of channels to use (2 for Stereo, 1 for Mono).
	OPUS_CHANNELS = 2

	//OPUS_BITRATE=128000 // Opus at 128 KB/s (VBR) is pretty much transparentk
	//-1 means MAX_BITRATE
	// MAX_BITRATE means libopus will use as much space it can put in opus packets. So it's controlled by the MAX_PACKET_SIZE in some way.
	OPUS_BITRATE = 40000

	// size in pcm samples (1 sample is int16) (2 bytes = 1 sample) (480 frame_size = 960 bytes
	// samplerate * frame_duration = frame_size = number of pcm sampels in one frame per channel
	OPUS_PCM_FRAME_SIZE = 480 // 48000*10ms = 480
	OPUS_FRAME_DURATION = 10  // 10 ms

	// The Application to use for opus. libopus will automatically
	OPUS_APPLICATION = OPUS_APPLICATION_AUDIO

	// Variable Bit Rate, if set to one libopus will automatically change the bitrate as it sees fit.
	OPUS_VBR = 0
)