sink: move GST pipeline construction to bash script

The sinkctl tool is currently a hack to make Miracast sinks work. The
embedded gst-launch invocation is kinda ugly to handle. Move it into a
bash-script so we can experiment a bit more with different pipelines.
Ultimatively, the goal is obviously to make this work as its own gst
element.

Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>

res/miracle-gst.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+DEBUG='0'
+AUDIO='0'
+SCALE='0'
+
+while getopts "d:as" optname
+  do
+    case "$optname" in
+      "d")
+        DEBUG=`echo ${OPTARG} | tr -d ' '`
+        ;;
+      "a")
+        AUDIO='1'
+        ;;
+      "s")
+        SCALE='1'
+        ;;
+      "?")
+        echo "Unknown option $OPTARG"
+        ;;
+      *)
+      # Should not occur
+        echo "Unknown error while processing options"
+        ;;
+    esac
+  done
+
+RUN="/usr/bin/gst-launch-1.0 -v "
+if [ $DEBUG != '0' ]
+then
+  RUN+="--gst-debug=${DEBUG} "
+fi
+
+RUN+="udpsrc port=1991 caps=\"application/x-rtp, media=video\" ! rtpjitterbuffer latency=100 ! rtpmp2tdepay ! tsdemux "
+
+if [ $AUDIO == '1' ]
+then
+  RUN+="name=demuxer demuxer. "
+fi
+
+RUN+="! queue max-size-buffers=0 max-size-time=0 ! h264parse ! avdec_h264 ! videoconvert ! "
+
+if [ $SCALE == '1' ]
+then
+  RUN+="videoscale method=1 ! video/x-raw,width=1280,height=800 ! "
+fi
+
+RUN+="autovideosink "
+
+if [ $AUDIO == '1' ]
+then
+  RUN+="demuxer. ! queue max-size-buffers=0 max-size-time=0 ! aacparse ! avdec_aac ! audioconvert ! audioresample ! autoaudiosink "
+fi
+
+echo "running: $RUN"
+exec ${RUN}