You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.1 KiB
38 lines
1.1 KiB
package sdp
|
|
|
|
import (
|
|
"bytes"
|
|
"strconv"
|
|
)
|
|
|
|
// Codec describes one of the codec lines in an SDP. This data will be
|
|
// magically filled in if the rtpmap wasn't provided (assuming it's a well
|
|
// known codec having a payload type less than 96.)
|
|
type Codec struct {
|
|
PT uint8 // 7-bit payload type we need to put in our RTP packets
|
|
Name string // e.g. PCMU, G729, telephone-event, etc.
|
|
Rate int // frequency in hertz. usually 8000
|
|
Param string // sometimes used to specify number of channels
|
|
Fmtp string // some extra info; i.e. dtmf might set as "0-16"
|
|
}
|
|
|
|
func (codec *Codec) Append(b *bytes.Buffer) {
|
|
b.WriteString("a=rtpmap:")
|
|
b.WriteString(strconv.FormatInt(int64(codec.PT), 10))
|
|
b.WriteString(" ")
|
|
b.WriteString(codec.Name)
|
|
b.WriteString("/")
|
|
b.WriteString(strconv.Itoa(codec.Rate))
|
|
if codec.Param != "" {
|
|
b.WriteString("/")
|
|
b.WriteString(codec.Param)
|
|
}
|
|
b.WriteString("\r\n")
|
|
if codec.Fmtp != "" {
|
|
b.WriteString("a=fmtp:")
|
|
b.WriteString(strconv.FormatInt(int64(codec.PT), 10))
|
|
b.WriteString(" ")
|
|
b.WriteString(codec.Fmtp)
|
|
b.WriteString("\r\n")
|
|
}
|
|
}
|