feat: log available v4l2 controls

Needs new option in config file
log_v4l2ctrls: true

This spits out the equvivalent to v4l2-ctl -L in log.
See README for details.

Signed-off-by: Stephan Wendel <me@stephanwe.de>

README.md

@@ -282,15 +282,33 @@ to your camera setup section. \
 Restart webcamd via mainsail (or your used UI) and you're good to go.
 
 To determine which options or better said parameters your Webcam provides, \
-login to your Pi via ssh and type
+add to your
 
-    v4l2-ctl -d <yourdevice> -L
+    [webcamd]
 
-_Note: Replace \<yourdevice> with the according string. ex.:_
+section, simply
 
-    v4l2-ctl -d /dev/video0 -L
+    log_v4l2ctrls: true
 
-This will show you a list with available options.
+This will show you a list with available options. Like this:
+
+    [04/02/22 15:07:44] webcamd: Supported Controls:
+    [04/02/22 15:07:44] webcamd: 		brightness 0x00980900 (int) : min=1 max=255 step=1 default=128 value=128
+    [04/02/22 15:07:44] webcamd: 		contrast 0x00980901 (int) : min=1 max=255 step=1 default=128 value=128
+    [04/02/22 15:07:44] webcamd: 		saturation 0x00980902 (int) : min=1 max=255 step=1 default=128 value=128
+    [04/02/22 15:07:44] webcamd: 		white_balance_temperature_auto 0x0098090c (bool) : default=1 value=1
+    [04/02/22 15:07:44] webcamd: 		gain 0x00980913 (int) : min=1 max=100 step=1 default=50 value=50
+    [04/02/22 15:07:45] webcamd: 		power_line_frequency 0x00980918 (menu) : min=0 max=2 default=1 value=1
+    [04/02/22 15:07:45] webcamd: 		0: Disabled
+    [04/02/22 15:07:45] webcamd: 		1: 50 Hz
+    [04/02/22 15:07:45] webcamd: 		2: 60 Hz
+    [04/02/22 15:07:45] webcamd: 		white_balance_temperature 0x0098091a (int) : min=2800 max=6500 step=1 default=4650 value=4650 flags=inactive
+    [04/02/22 15:07:45] webcamd: 		sharpness 0x0098091b (int) : min=1 max=255 step=1 default=128 value=128
+    [04/02/22 15:07:45] webcamd: 		exposure_auto 0x009a0901 (menu) : min=0 max=3 default=0 value=0
+    [04/02/22 15:07:45] webcamd: 		0: Auto Mode
+    [04/02/22 15:07:45] webcamd: 		2: Shutter Priority Mode
+    [04/02/22 15:07:46] webcamd: 		exposure_absolute 0x009a0902 (int) : min=5 max=2500 step=1 default=5 value=5 flags=inactive
+    [04/02/22 15:07:46] webcamd: 		exposure_auto_priority 0x009a0903 (bool) : default=0 value=0
 
 You have to "play around" with those settings if it matches your needs.
 simply repeat the commands as mentioned earlier in your ssh connection.

libs/hwhandler.sh

@@ -14,7 +14,7 @@
 # shellcheck enable=require-variable-braces
 
 # Exit upon Errors
-set -e
+set -eE
 
 ### Detect Hardware
 function detect_avail_cams {
@@ -30,6 +30,9 @@ function detect_avail_cams {
             if [ "$(log_level)" != "quiet" ]; then
                 list_cam_formats "${v4l}"
             fi
+            if [ "$(log_v4l2ctrls)" == "true" ]; then
+                list_cam_v4l2ctrls "${v4l}"
+            fi
         done
     else
         log_msg "INFO: No usable Cameras found."
@@ -54,7 +57,7 @@ function detect_avail_csi {
 
 # Used for "verbose" and "debug" logging in logging.sh
 function list_cam_formats {
-    local device
+    local device formats
     device="${1}"
     formats="$(v4l2-ctl -d "${device}" --list-formats-ext | sed '1,3d')"
     log_msg "Supported Formats:"
@@ -63,6 +66,16 @@ function list_cam_formats {
     done
 }
 
+function list_cam_v4l2ctrls {
+    local device ctrls
+    device="${1}"
+    ctrls="$(v4l2-ctl -d "${device}" --list-ctrls-menus)"
+    log_msg "Supported Controls:"
+    echo "${ctrls}" | while read -r i; do
+        log_msg "\t\t${i}"
+    done
+}
+
 # Determine connected "raspicam" device
 function detect_raspicam {
     local avail

libs/logging.sh

@@ -14,7 +14,7 @@
 # shellcheck enable=require-variable-braces
 
 # Exit upon Errors
-set -e
+set -eE
 
 ## Logging
 function init_log_entry {
@@ -35,6 +35,10 @@ function log_level {
     fi
 }
 
+function log_v4l2ctrls {
+    get_param webcamd log_v4l2ctrls 2> /dev/null || echo "false"
+}
+
 function delete_log {
     local del_log logfile
     logfile="$(get_param "webcamd" log_path | sed "s#^~#${HOME}#gi")"
@@ -104,6 +108,9 @@ function print_cams {
         if [ ! "$(log_level)" = "quiet" ]; then
             list_cam_formats "${raspicam}"
         fi
+        if [ "$(log_v4l2ctrls)" == "true" ]; then
+            list_cam_v4l2ctrls "${raspicam}"
+        fi
     fi
     if [ -d "/dev/v4l/by-id/" ]; then
         detect_avail_cams

sample_configs/mainsail_default.conf

@@ -6,6 +6,7 @@
 [webcamd]
 log_path: ~/klipper_logs/webcamd.log    # Default logfile in ~/klipper_logs/webcamd.log
 log_level: verbose                      # Valid Options are quiet/verbose/debug
+log_v4l2ctrls: true
 
 [cam 1]
 mode: mjpg                              # mjpg/rtsp/webrtc

sample_configs/minimal.conf

@@ -1,12 +1,16 @@
 [webcamd]
 log_path: ~/klipper_logs/webcamd.log    # Default logfile in ~/klipper_logs/webcamd.log
 log_level: quiet                        # Valid Options are quiet/verbose/debug
+log_v4l2ctrls: false                    # if set to true, it logs available controls for camera
+delete_log: false                       # true to get fresh log on every start
+
+
 
 [cam 1]
-mode: mjpg                              # mjpg/rtsp/webrtc
+mode: mjpg                              # mjpg/rtsp/webrtc ( webrtc is comming in the future )
-port: 8080                              # Port
+port: 8080                              # Port for ustreamer
 device: /dev/video0                     # See Log for available ...
-resolution: 640x480                     # widthxheight format
+resolution: 640x480                     # WidthxHeight format
 max_fps: 15                             # If Hardware Supports this it will be forced, ohterwise ignored/coerced.
-#custom_flags:                          # You can run the Stream Services with custom flags.
+#custom_flags:                          # Custom Flags to set for ustreamer, this is optional