// IANA Assigned VoIP Codec Payload Types
//
// The following codecs have been standardized by IANA thereby
// allowing their 'a=rtpmap' information to be omitted in SDP
// messages.  they've been hard coded to make your life easier.
//
// Many of these codecs (G711, G722, G726, GSM, LPC) have been
// implemented by Steve Underwood in his excellent SpanDSP library.
//
// Newer codecs like silk, broadvoice, speex, etc. use a dynamic
// payload type.
//
// Reference Material:
//
// - IANA Payload Types: http://www.iana.org/assignments/rtp-parameters
// - Explains well-known ITU codecs: http://tools.ietf.org/html/rfc3551
//

package sdp

var (
	ULAWCodec = Codec{PT: 0, Name: "PCMU", Rate: 8000}
	DTMFCodec = Codec{PT: 101, Name: "telephone-event", Rate: 8000, Fmtp: "0-16"}
	Opus      = Codec{PT: 111, Name: "opus", Rate: 48000, Param: "2"}

	StandardCodecs = map[uint8]Codec{
		0:  ULAWCodec,                                           // G.711 μ-Law is the de-facto codec (SpanDSP g711.h)
		3:  Codec{PT: 3, Name: "GSM", Rate: 8000},               // Uncool codec asterisk ppl like (SpanDSP gsm0610.h)
		4:  Codec{PT: 4, Name: "G723", Rate: 8000},              // Worthless.
		5:  Codec{PT: 5, Name: "DVI4", Rate: 8000},              // Adaptive pulse code modulation (SpanDSP ima_adpcm.h)
		6:  Codec{PT: 6, Name: "DVI4", Rate: 16000},             // Adaptive pulse code modulation 16khz (SpanDSP ima_adpcm.h)
		7:  Codec{PT: 7, Name: "LPC", Rate: 8000},               // Chat with your friends ww2 field marshall style (SpanDSP lpc10.h)
		8:  Codec{PT: 8, Name: "PCMA", Rate: 8000},              // G.711 variant of μ-Law used in yurop (SpanDSP g711.h)
		9:  Codec{PT: 9, Name: "G722", Rate: 8000},              // Used for Polycom HD Voice; Rate actually 16khz LOL (SpanDSP g722.h)
		10: Codec{PT: 10, Name: "L16", Rate: 44100, Param: "2"}, // 16-bit signed PCM stereo/mono (mind your MTU; adjust ptime)
		11: Codec{PT: 11, Name: "L16", Rate: 44100},
		12: Codec{PT: 12, Name: "QCELP", Rate: 8000},
		13: Codec{PT: 13, Name: "CN", Rate: 8000}, // RFC3389 comfort noise
		14: Codec{PT: 14, Name: "MPA", Rate: 90000},
		15: Codec{PT: 15, Name: "G728", Rate: 8000},
		16: Codec{PT: 16, Name: "DVI4", Rate: 11025},
		17: Codec{PT: 17, Name: "DVI4", Rate: 22050},
		18: Codec{PT: 18, Name: "G729", Rate: 8000}, // Best telephone voice codec (if you got $10 bucks)
		25: Codec{PT: 25, Name: "CelB", Rate: 90000},
		26: Codec{PT: 26, Name: "JPEG", Rate: 90000},
		28: Codec{PT: 28, Name: "nv", Rate: 90000},
		31: Codec{PT: 31, Name: "H261", Rate: 90000}, // RFC4587 Video
		32: Codec{PT: 32, Name: "MPV", Rate: 90000},
		33: Codec{PT: 33, Name: "MP2T", Rate: 90000},
		34: Codec{PT: 34, Name: "H263", Rate: 90000}, // $$$ video
	}
)