#! /bin/bash

trap do_exit INT

PIDS=""
do_exit() {
        kill $PIDS >/dev/null 2>&1
        sleep 10
        kill -9 $PIDS >/dev/null 2>&1
        pkill -9 gst-launch-1.0
}

export DISPLAY=:0
(sleep 60; export DISPLAY=:0; xset s off; xset -dpms; xset s noblank) &

# receive video stream from cam1
(
	while true; do
		gst-launch-1.0 -e rtpbin name=b rtp-profile=avpf do-retransmission=true \
		udpsrc address=:: port=5001 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! b.recv_rtp_sink_0 \
		b. ! rtpulpfecdec ! rtph264depay ! decodebin ! videoconvert ! videoscale ! video/x-raw,width=1024,height=786 ! glimagesink \
		udpsrc address=:: port=5003 ! b.recv_rtcp_sink_0 \
		b.send_rtcp_src_0 ! udpsink host=cam1 port=5002 sync=false async=false &
		GSTPID=$!
		
		while true; do
			# rename window (FIXME: using different players is a nasty hack)
			GSTXID="$(wmctrl -l | grep "OpenGL renderer" | cut -d" " -f1)" >/dev/null 2>&1
			wmctrl -i -r "$GSTXID" -e 0,2000,0,1000,1000 >/dev/null 2>&1
			wmctrl -i -r "$GSTXID" -b add,fullscreen >/dev/null 2>&1
			wmctrl -i -r "$GSTXID" -b add,above >/dev/null 2>&1
			wmctrl -i -r "$GSTXID" -N gst-cam1 >/dev/null 2>&1 && break
			kill -s 0 $GSTPID || break
			sleep .2
		done
		
		wait $GSTPID
		sleep .2
	done
) &
PIDS="$PIDS $!"

# receive audio stream from cam1
amixer -c0 sset 'Master' 100%
amixer -c0 sset 'PCM' 0%
(
	while true; do
		gst-launch-1.0 -v udpsrc address=:: port=5008 caps="application/x-rtp" ! rtpjitterbuffer latency=20 do-lost=True ! rtpopusdepay ! opusdec plc=true ! alsasink device=hw:0
	done
) &
PIDS="$PIDS $!"

# send audio stream to cam1
amixer -c0 sset 'Mic' 100%
(
	while true; do
		gst-launch-1.0 -vv alsasrc device=plughw:0 ! audioconvert ! audioresample ! opusenc ! rtpopuspay ! udpsink host=cam1 port=5007
	done
) &
PIDS="$PIDS $!"

# receive video stream from cam2
(
	while true; do
		gst-launch-1.0 -e rtpbin name=b rtp-profile=avpf do-retransmission=true \
		udpsrc address=:: port=5004 caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)96" ! b.recv_rtp_sink_0 \
		b. ! rtpulpfecdec ! rtph264depay ! decodebin ! videoconvert ! videoscale ! video/x-raw,width=1024,height=786 ! xvimagesink \
		udpsrc address=:: port=5006 ! b.recv_rtcp_sink_0 \
		b.send_rtcp_src_0 ! udpsink host=cam2 port=5005 sync=false async=false &
		GSTPID=$!
		
		while true; do
			# rename window (FIXME: using different players is a nasty hack)
			GSTXID="$(wmctrl -l | grep "gst-launch-1.0" | cut -d" " -f1)" >/dev/null 2>&1
			wmctrl -i -r "$GSTXID" -e 0,0,0,1000,1000 >/dev/null 2>&1
			wmctrl -i -r "$GSTXID" -b add,fullscreen >/dev/null 2>&1
			wmctrl -i -r "$GSTXID" -b add,above >/dev/null 2>&1
			wmctrl -i -r "$GSTXID" -N gst-cam2 >/dev/null 2>&1 && break
			kill -s 0 $GSTPID || break
			sleep .2
		done
		
		wait $GSTPID
		sleep .2
	done
) &
PIDS="$PIDS $!"

# receive audio stream from cam2
amixer -c1 sset 'Speaker' 100%
(
	while true; do
		gst-launch-1.0 -v udpsrc address=:: port=5010 caps="application/x-rtp" ! rtpjitterbuffer latency=20 do-lost=True ! rtpopusdepay ! opusdec plc=true ! alsasink device=hw:1
	done
) &
PIDS="$PIDS $!"

# send audio stream to cam2
amixer -c1 sset 'Master' 100%
(
	while true; do
		gst-launch-1.0 -vv alsasrc device=plughw:1 ! audioconvert ! audioresample ! opusenc ! rtpopuspay ! udpsink host=cam1 port=5009
	done
) &
PIDS="$PIDS $!"


wait $PIDS