protocol/rtsp: removing rtp package

We already have an rtp package, which I will extend with client functionality, so we don't need this here.
This commit is contained in:
Saxon 2019-04-17 12:20:36 +09:30
parent 02c11c234f
commit 1bcf05830d
2 changed files with 0 additions and 171 deletions

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@ -1,150 +0,0 @@
package rtp
import (
"fmt"
"net"
)
const (
RTP_VERSION = 2
)
const (
hasRtpPadding = 1 << 2
hasRtpExt = 1 << 3
)
// Packet as per https://tools.ietf.org/html/rfc1889#section-5.1
//
// 0 1 2 3
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// |V=2|P|X| CC |M| PT | sequence number |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | timestamp |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | synchronization source (SSRC) identifier |
// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
// | contributing source (CSRC) identifiers |
// | .... |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
type RtpPacket struct {
Version byte
Padding bool
Ext bool
Marker bool
PayloadType byte
SequenceNumber uint
Timestamp uint
SyncSource uint
CSRC []uint
ExtHeader uint
ExtData []byte
Payload []byte
}
type Session struct {
Rtp net.PacketConn
Rtcp net.PacketConn
RtpChan <-chan RtpPacket
RtcpChan <-chan []byte
rtpChan chan<- RtpPacket
rtcpChan chan<- []byte
}
func New(rtp, rtcp net.PacketConn) *Session {
rtpChan := make(chan RtpPacket, 10)
rtcpChan := make(chan []byte, 10)
s := &Session{
Rtp: rtp,
Rtcp: rtcp,
RtpChan: rtpChan,
RtcpChan: rtcpChan,
rtpChan: rtpChan,
rtcpChan: rtcpChan,
}
go s.HandleRtpConn(rtp)
go s.HandleRtcpConn(rtcp)
return s
}
func toUint(arr []byte) (ret uint) {
for i, b := range arr {
ret |= uint(b) << (8 * uint(len(arr)-i-1))
}
return ret
}
func (s *Session) HandleRtpConn(conn net.PacketConn) {
buf := make([]byte, 4096)
for {
n, _, err := conn.ReadFrom(buf)
if err != nil {
panic(err)
}
cpy := make([]byte, n)
copy(cpy, buf)
go s.handleRtp(cpy)
}
}
func (s *Session) HandleRtcpConn(conn net.PacketConn) {
buf := make([]byte, 4096)
for {
n, _, err := conn.ReadFrom(buf)
if err != nil {
panic(err)
}
cpy := make([]byte, n)
copy(cpy, buf)
go s.handleRtcp(cpy)
}
}
func (s *Session) handleRtp(buf []byte) {
packet := RtpPacket{
Version: buf[0] & 0x03,
Padding: buf[0]&hasRtpPadding != 0,
Ext: buf[0]&hasRtpExt != 0,
CSRC: make([]uint, buf[0]>>4),
Marker: buf[1]&1 != 0,
PayloadType: buf[1] >> 1,
SequenceNumber: toUint(buf[2:4]),
Timestamp: toUint(buf[4:8]),
SyncSource: toUint(buf[8:12]),
}
if packet.Version != RTP_VERSION {
fmt.Printf("version: %v\n", packet.Version)
}
i := 12
for j := range packet.CSRC {
packet.CSRC[j] = toUint(buf[i : i+4])
i += 4
}
if packet.Ext {
packet.ExtHeader = toUint(buf[i : i+2])
length := toUint(buf[i+2 : i+4])
i += 4
if length > 0 {
packet.ExtData = buf[i : i+int(length)*4]
i += int(length) * 4
}
}
packet.Payload = buf[i:]
s.rtpChan <- packet
}
func (s *Session) handleRtcp(buf []byte) {
// TODO: implement rtcp
}

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@ -1,21 +0,0 @@
package rtp
import (
"testing"
)
func TestToUint(t *testing.T) {
tests := []struct {
arr []byte
exp uint
}{
{[]byte{1, 2}, 0x102},
{[]byte{3, 2, 1, 0}, 0x3020100},
}
for _, tst := range tests {
val := toUint(tst.arr)
if val != tst.exp {
t.Errorf("%d != %d for % x", val, tst.exp, tst.arr)
}
}
}