From 1bcf05830d7b3e84856000158948ac242b5bb3a3 Mon Sep 17 00:00:00 2001
From: Saxon <saxon@ausocean.org>
Date: Wed, 17 Apr 2019 12:20:36 +0930
Subject: [PATCH] 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.
---
 protocol/rtsp/rtp/rtp.go      | 150 ----------------------------------
 protocol/rtsp/rtp/rtp_test.go |  21 -----
 2 files changed, 171 deletions(-)
 delete mode 100644 protocol/rtsp/rtp/rtp.go
 delete mode 100644 protocol/rtsp/rtp/rtp_test.go

diff --git a/protocol/rtsp/rtp/rtp.go b/protocol/rtsp/rtp/rtp.go
deleted file mode 100644
index 8d2712c2..00000000
--- a/protocol/rtsp/rtp/rtp.go
+++ /dev/null
@@ -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
-}
diff --git a/protocol/rtsp/rtp/rtp_test.go b/protocol/rtsp/rtp/rtp_test.go
deleted file mode 100644
index da54d96c..00000000
--- a/protocol/rtsp/rtp/rtp_test.go
+++ /dev/null
@@ -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)
-		}
-	}
-}