av/camstreamer/camstreamer.go

package camstreamer

import (
  "errors"
)

type CamStreamer struct {
  RtspUrl string
  RtpUrl string
  RtpPort uint16
  RtcpPort uint16
}

func (cs *CamStreamer)Connect()(session *RtpSession, err error){
  var res string
  sess := rtsp.NewSession()

  if res, err = sess.Options(sc.RtspUrl); err != nil {
    return
  }
  res, err = sess.Describe(rtspUrl)
  if err != nil {
    log.Fatalln(err)
  }
  p, err := rtsp.ParseSdp(&io.LimitedReader{R: res.Body, N: res.ContentLength})
  if err != nil {
  }
  log.Printf("%+v", p)
  res, err = sess.Setup(rtpUrl, fmt.Sprintf("RTP/AVP;unicast;client_port=%d-%d", rtpPort, rtcpPort))
  if err != nil {
  }
  log.Println(res)
  res, err = sess.Play(rtspUrl, res.Header.Get("Session"))
  if err != nil {
  }
  log.Println(res)
  // create udp connection for rtp stuff
  rtpLaddr, err := net.ResolveUDPAddr("udp", "192.168.0.109:17300")
  if err != nil {
    t.Errorf("Local rtp addr not set! %v\n", err)
  }
  rtpAddr, err := net.ResolveUDPAddr("udp", "192.168.0.50:17300")
  if err != nil {
    t.Errorf("Resolving rtp address didn't work! %v\n", err)
  }
  rtpConn, err := net.DialUDP("udp", rtpLaddr, rtpAddr)
  if err != nil {
    t.Errorf("Conncection not established! %v\n", err)
  }
  // Create udp connection for rtcp stuff
  rtcpLaddr, err := net.ResolveUDPAddr("udp", "192.168.0.109:17319")
  if err != nil {
    t.Errorf("Local RTCP address not resolved! %v\n", err)
  }
  rtcpAddr, err := net.ResolveUDPAddr("udp", "192.168.0.50:17301")
  if err != nil {
    t.Errorf("Remote RTCP address not resolved! %v\n", err)
  }
  rtcpConn, err := net.DialUDP("udp", rtcpLaddr, rtcpAddr)
  if err != nil {
    t.Errorf("Connection not established! %v\n", err)
  }
  // let's create a session that will store useful stuff from the connections
  rtpSession := NewSession(rtpConn, rtcpConn)
}

/*******************************************************
Testing stuff related to connection i.e. rtsp, rtp, rtcp
********************************************************/
const (
	rtpPort  = 17300
	rtcpPort = 17319
	rtspUrl  = "rtsp://192.168.0.50:8554/CH002.sdp"
	rtpUrl   = "rtsp://192.168.0.50:8554/CH002.sdp/track1"
)

/* Let's see if we can connect to an rtsp device then read an rtp stream,
and then convert the rtp packets to mpegts packets and output. */
func TestRTSP(t *testing.T) {
	sess := rtsp.NewSession()
	res, err := sess.Options(rtspUrl)
	if err != nil {
		t.Errorf("Shouldn't have got error: %v\n", err)
	}

	res, err = sess.Describe(rtspUrl)
	if err != nil {
		log.Fatalln(err)
		t.Errorf("Shouldn't have got error: %v\n", err)
	}
	p, err := rtsp.ParseSdp(&io.LimitedReader{R: res.Body, N: res.ContentLength})
	if err != nil {
		t.Errorf("Shouldn't have got error: %v\n", err)
	}
	log.Printf("%+v", p)
	res, err = sess.Setup(rtpUrl, fmt.Sprintf("RTP/AVP;unicast;client_port=%d-%d", rtpPort, rtcpPort))
	if err != nil {
		t.Errorf("Shouldn't have got error: %v\n", err)
	}
	log.Println(res)
	res, err = sess.Play(rtspUrl, res.Header.Get("Session"))
	if err != nil {
		t.Errorf("Shouldn't have got error: %v\n", err)
	}
	log.Println(res)
}

func TestRTP(t *testing.T) {
	sess := rtsp.NewSession()
	res, err := sess.Options(rtspUrl)
	if err != nil {
		t.Errorf("Shouldn't have got error: %v\n", err)
	}
	res, err = sess.Describe(rtspUrl)
	if err != nil {
		log.Fatalln(err)
		t.Errorf("Shouldn't have got error: %v\n", err)
	}
	p, err := rtsp.ParseSdp(&io.LimitedReader{R: res.Body, N: res.ContentLength})
	if err != nil {
		t.Errorf("Shouldn't have got error: %v\n", err)
	}
	log.Printf("%+v", p)
	res, err = sess.Setup(rtpUrl, fmt.Sprintf("RTP/AVP;unicast;client_port=%d-%d", rtpPort, rtcpPort))
	if err != nil {
		t.Errorf("Shouldn't have got error: %v\n", err)
	}
	log.Println(res)
	res, err = sess.Play(rtspUrl, res.Header.Get("Session"))
	if err != nil {
		t.Errorf("Shouldn't have got error: %v\n", err)
	}
	log.Println(res)
	// create udp connection for rtp stuff
	rtpLaddr, err := net.ResolveUDPAddr("udp", "192.168.0.109:17300")
	if err != nil {
		t.Errorf("Local rtp addr not set! %v\n", err)
	}
	rtpAddr, err := net.ResolveUDPAddr("udp", "192.168.0.50:17300")
	if err != nil {
		t.Errorf("Resolving rtp address didn't work! %v\n", err)
	}
	rtpConn, err := net.DialUDP("udp", rtpLaddr, rtpAddr)
	if err != nil {
		t.Errorf("Conncection not established! %v\n", err)
	}
	// Create udp connection for rtcp stuff
	rtcpLaddr, err := net.ResolveUDPAddr("udp", "192.168.0.109:17319")
	if err != nil {
		t.Errorf("Local RTCP address not resolved! %v\n", err)
	}
	rtcpAddr, err := net.ResolveUDPAddr("udp", "192.168.0.50:17301")
	if err != nil {
		t.Errorf("Remote RTCP address not resolved! %v\n", err)
	}
	rtcpConn, err := net.DialUDP("udp", rtcpLaddr, rtcpAddr)
	if err != nil {
		t.Errorf("Connection not established! %v\n", err)
	}
	// let's create a session that will store useful stuff from the connections
	rtpSession := NewSession(rtpConn, rtcpConn)
	time.Sleep(2 * time.Second)
	select {
	default:
		t.Errorf("Should have got rtpPacket!")
	case rtpPacket := <-rtpSession.RtpChan:
		fmt.Printf("RTP packet: %v\n", rtpPacket)
	}
}