Adds option to select video camera.

src/frameless

@@ -1,9 +1,116 @@
 #!/bin/bash
 
+# Program name
+PROGRAM_NAME="Frameless"
+# PROGRAM_CODE="frameless"
+# PROGRAM_VERSION="1.0.0"
+PROGRAM_V="1.0"
+# PROGRAM_URL="https://git.vdm.dev/llewellyn/${PROGRAM_CODE}"
+
+# Make sure the required packages are installed
+command -v mplayer >/dev/null 2>&1 || {
+  echo >&2 "[error] We require mplayer for $PROGRAM_NAME v${PROGRAM_V} to work, but it's not installed.  Aborting."
+  exit 1
+}
+command -v zenity >/dev/null 2>&1 || {
+  echo >&2 "[error] We require zenity for $PROGRAM_NAME v${PROGRAM_V} to work, but it's not installed.  Aborting."
+  exit 1
+}
+dpkg -l | grep v4l-utils >/dev/null 2>&1 || {
+  echo >&2 "[error] We require v4l-utils for $PROGRAM_NAME v${PROGRAM_V} to work, but it's not installed.  Aborting."
+  exit 1
+}
+
+# to install the needed packages :)
+# sudo apt-get install mplayer zenity v4l-utils
+
+# the device name
+DEVICE=''
+
+# main function
+function main() {
+  # select the video to use
+  selectVideoDevice
+
+  # open the menu
+  mainMenu
+
+  exit 0;
+}
+
+# select the video camera
+function selectVideoDevice() {
+
+  # get the cameras
+  local cameras=''
+  cameras=$(getDevices)
+
+  # stop all videos
+  stopVideo
+
+  # get the selection
+  local selected=""
+
+  while [ -z "$selected" ]; do
+    # Display the list of cameras using Zenity
+    selected=$(zenity --list --title "Select a Video Camera" --column "Camera" $cameras)
+    # Check the exit status of Zenity
+    if [ $? -eq 1 ]; then
+      # The user clicked the "Cancel" button, exit the loop
+      exit 0
+    elif [ -z "$selected" ]; then
+      # No camera was selected, display an error message
+      zenity --error --text "No camera was selected. Please select a camera."
+    fi
+  done
+
+  # Camera was selected, display a preview
+  previewDevice "${selected}"
+
+  DEVICE="${selected}"
+
+  zenity --question --text "Is this the camera you would like to use?"
+
+  # Check the exit status of Zenity
+  if [ $? -eq 1 ]; then
+    selectVideoDevice
+  fi
+
+  # stop all videos
+  stopVideo
+}
+
+# function get devices
+function getDevices() {
+  # Our local values
+  local devices=''
+  local list=''
+  # Get a list of video cameras
+  devices=$(ls /dev | grep '^video')
+  # Check which devices can be displayed by MPlayer
+  for device in $devices; do
+    # Use v4l2-ctl to check if the device supports previewing
+    if v4l2-ctl --device="/dev/$device" --list-formats | grep -q "YUYV" ; then
+      # The device supports previewing, add it to the list
+      list="$list $device"
+    fi
+  done
+
+  echo "$list"
+}
+
+# Function to display a preview of the given video device
+function previewDevice() {
+  device=$1
+  mplayer tv:// -tv driver=v4l2:device="/dev/$device" -geometry "300x300" -quiet -nolirc -ontop -noborder -nosound -vo xv &
+  disown
+}
+
 # MAIN MENU
 function mainMenu() {
+  local CHOICE=''
   # select your position
-  local CHOICE=$(zenity --list \
+  CHOICE=$(zenity --list \
     --title="Tutorial Video Player" --radiolist --width=400 --height=300 \
     --text "Select where you wnat the video to display" \
     --radiolist --column "Select" --column "Value" --column="Position Options" \
@@ -12,13 +119,13 @@ function mainMenu() {
     FASLE right "Right Corner" \
     FASLE topleft "Top Left Corner" \
     FASLE topright "Top Right Corner" \
-    FASLE quit "Quit" \
-    --hide-column=2 2>/dev/null)
+    FASLE camera "Select Camera" \
+    --hide-column=2 --cancel-label "Close")
 
-  # alwasy first stop videos playing
+  # always first stop videos playing
   stopVideo
 
-  # triger the choise acction
+  # trigger the choose action
   case $CHOICE in
     "large")
       showLarge
@@ -35,7 +142,10 @@ function mainMenu() {
     "topright")
       showTopright
       ;;
-    "quit") quitProgram ;;
+    "camera")
+      selectVideoDevice
+      ;;
+    *) exit 0;;
   esac
 
   # menu loop
@@ -45,46 +155,43 @@ function mainMenu() {
 # show large center video
 function showLarge() {
   mplayer -zoom -ontop -noborder -nosound -vo gl:nomanyfmts \
-    -vf mirror -xy 2 tv:// -tv device=/dev/video4 -screen 1 &
+    -vf mirror -xy 2 tv:// -tv driver=v4l2:device="/dev/${DEVICE}" -screen 1 &
+  disown
 }
 
 # show video on bottom left
 function showLeft() {
   mplayer -zoom -ontop -noborder -nosound -vo gl:nomanyfmts \
-    -geometry 320x240+30+780 -vf mirror tv:// -tv device=/dev/video4 -screen 1 &
+    -geometry 320x240+30+780 -vf mirror tv:// -tv driver=v4l2:device="/dev/${DEVICE}" -screen 1 &
+  disown
 }
 
 # show video on bottom right
 function showRight() {
   mplayer -zoom -ontop -noborder -nosound -vo gl:nomanyfmts \
-    -geometry 320x240+1570+780 -vf mirror tv:// -tv device=/dev/video4 -screen 1 &
+    -geometry 320x240+1570+780 -vf mirror tv:// -tv driver=v4l2:device="/dev/${DEVICE}" -screen 1 &
+  disown
 }
 
 # show video on top left
 function showTopleft() {
   mplayer -zoom -ontop -noborder -nosound -vo gl:nomanyfmts \
-    -geometry 320x240+30+30 -vf mirror tv:// -tv device=/dev/video4 -screen 1 &
+    -geometry 320x240+30+30 -vf mirror tv:// -tv driver=v4l2:device="/dev/${DEVICE}" -screen 1 &
+  disown
 }
 
 # show video on top right
 function showTopright() {
   mplayer -zoom -ontop -noborder -nosound -vo gl:nomanyfmts \
-    -geometry 320x240+1570+30 -vf mirror tv:// -tv device=/dev/video4 -screen 1 &
-}
-
-# show video on top right
-function quitProgram() {
-  stopVideo
-  # end loop
-  exit 0;
+    -geometry 320x240+1570+30 -vf mirror tv:// -tv driver=v4l2:device="/dev/${DEVICE}" -screen 1 &
+  disown
 }
 
 # stop videos playing
 function stopVideo() {
-  ps aux | grep mplayer | awk '{print $2}' | xargs kill
+  pkill mplayer
   sleep 1
 }
 
 # start program
-mainMenu
-
+main