Audio packet

Server : sending audio data (header)

Size	Format	Description
2 bytes	16 bit unsigned integer	0xBEF3
1 byte	8 bit unsigned integer	0
1 byte	8 bit unsigned integer	Codec used
4 bytes	32 bit unsigned integer	private ID
4 bytes	32 bit unsigned integer	public ID
2 bytes	16 bit unsigned integer	maybe a total conversation counter or something… keeping it at 0 is OK
2 bytes	16 bit unsigned integer	counter of conversations
4 bytes	32 bit unsigned integer	public ID of speaker
2 bytes	16 bit unsigned integer	counter of packets in this conversation
*	*	Audio data

Player : sending audio data (header)

Size	Format	Description
2 bytes	bit unsigned integer	0xBEF2
1 byte	8 bit unsigned integer	0
1 byte	8 bit unsigned integer	Codec used
4 bytes	32 bit unsigned integer	private ID
4 bytes	32 bit unsigned integer	public ID
2 bytes	16 bit unsigned integer	counter of packets in this conversation
2 bytes	16 bit unsigned integer	counter of conversations
*	*	Audio data

Audio data format

Codec, size, number of frames

Codec ID	Description	Info Data	Encoded data size	Frames per packet
0	CELP 5.1	6 bytes (???)	153 bytes	9
1	CELP 6.3	6 bytes (???)	51 bytes	3
2	GSM 14.8	6 bytes (???)	165 bytes	5
3	GSM 16.4	6 bytes (???)	132 bytes	4
4	CELP Win 5.2	???	???	???
5	Speex 3.4	1 byte (val=5)	27 bytes (43 bits per frame)	5
6	Speex 5.2	1 byte (val=5)	50 bytes (79 bits per frame)	5
7	Speex 7.2	1 byte (val=5)	75 bytes (119 bits per frame)	5
8	Speex 9.3	1 byte (val=5)	100 bytes (160 bits per frame)	5
9	Speex 12.3	1 byte (val=5)	138 bytes (220 bits per frame)	5
10	Speex 16.3	1 byte (val=5)	188 bytes (300 bits per frame)	5
11	Speex 16.9	1 byte (val=5)	228 bytes (364 bits per frame)	5
12	Speex 25.9	1 byte (val=5)	308 bytes (492 bits per frame)	5