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webcam_sysfs
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Signed-off-by: kokoye2007 <[email protected]>
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@kokoye2007
kokoye2007 committed Nov 14, 2024
1 parent e5c98d9 commit 3393250
Showing 1 changed file with 92 additions and 56 deletions.
148 changes: 92 additions & 56 deletions src/wifi-qr
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Original file line number Diff line number Diff line change
Expand Up @@ -538,30 +538,27 @@ check_file() {
fi
}

# Check if v4l2-ctl is installed
check_v4l2() {
if ! command -v v4l2-ctl &> /dev/null; then
if command -v zenity &> /dev/null; then
zenity --error \
--title="v4l2-ctl Not Found" \
--text="The v4l2-ctl utility is required but not installed.\n\nPlease install the v4l-utils package using your package manager:\n\nsudo apt install v4l-utils"
else
echo "Error: v4l2-ctl is not installed. Please install the v4l-utils package." >&2
fi
exit 1
fi
}

# Check if device in config exists and is available
check_existing_config() {
check_v4l2
if [ -f "${CONFIG_FILE}" ]; then
local current_device
current_device=$(grep "qrwebcam=" "${CONFIG_FILE}" | cut -d= -f2) || true
current_device_name=$(grep "qrcamname=" "${CONFIG_FILE}" | cut -d= -f2) || true
local current_device_name

if ! current_device=$(grep "qrwebcam=" "${CONFIG_FILE}" | cut -d= -f2); then
echo "Failed to read webcam device from config" >&2
get_webcam_devices
return
fi

if ! current_device_name=$(grep "qrcamname=" "${CONFIG_FILE}" | cut -d= -f2); then
echo "Failed to read webcam name from config" >&2
get_webcam_devices
return
fi

if [ -n "$current_device" ]; then
if [ -e "$current_device" ] && v4l2-ctl --device "$current_device" --all &>/dev/null; then
if [ -e "$current_device" ] && [ -r "$current_device" ]; then
echo "Configured webcam device is available: $current_device"
zbarwebcam=$current_device
return 0
Expand All @@ -570,14 +567,18 @@ check_existing_config() {
# Device not available - ask user what to do
if command -v zenity &> /dev/null; then
local action
action=$(zenity --list \
if ! action=$(zenity --list \
--title="Webcam Device Not Available" \
--text="The configured webcam '$current_device_name' is not available." \
--column="Action" \
"Select new webcam device" \
"Remove configuration" \
--width=400 \
--height=280)
then
echo "Dialog cancelled" >&2
exit 1
fi

case "$action" in
"Select new webcam device")
Expand Down Expand Up @@ -626,12 +627,50 @@ check_existing_config() {
fi
}

# Get webcam devices and create formatted list
# Get webcam devices using sysfs
get_webcam_devices() {
local devices
devices=$(v4l2-ctl --list-devices 2>/dev/null | grep -A1 ":$" | grep "/dev/video" | sed 's/\t//g') || true
local device_list=()
local seen_names=()

# Scan video devices in sysfs (even numbers only)
for sysdev in /sys/class/video4linux/video[02468]; do
if [ -d "$sysdev" ] && [ -f "$sysdev/name" ]; then
local id
local dev
local name

if ! id=$(basename "$sysdev"); then
echo "Failed to get device ID for $sysdev" >&2
continue
fi

dev="/dev/$id"

# Check if device exists and is readable
if [ -c "$dev" ] && [ -r "$dev" ]; then
if ! name=$(cat "$sysdev/name"); then
echo "Failed to read name for $sysdev" >&2
continue
fi

# Check if we've seen this camera name before
local duplicate=0
for seen in "${seen_names[@]}"; do
if [ "$seen" = "$name" ]; then
duplicate=1
break
fi
done

if [ $duplicate -eq 0 ]; then
seen_names+=("$name")
device_list+=("$id" "$name" "$dev")
fi
fi
fi
done

if [ -z "$devices" ]; then
if [ ${#device_list[@]} -eq 0 ]; then
if command -v zenity &> /dev/null; then
zenity --error \
--title="No Webcam Found" \
Expand All @@ -642,25 +681,10 @@ get_webcam_devices() {
exit 1
fi

# Create array to store device info
declare -a device_list

# Process each device
while read -r dev; do
if [ -n "$dev" ]; then
local id name
id=$(basename "$dev")
name=$(v4l2-ctl --device "$dev" --all 2>/dev/null | grep "Card type" | cut -d: -f2 | sed 's/^ *//')
if [ -n "$name" ]; then
device_list+=("$id" "$name" "$dev")
fi
fi
done <<< "$devices"

# Present device selection dialog if zenity is available
if command -v zenity &> /dev/null; then
local selected
selected=$(zenity --list \
if ! selected=$(zenity --list \
--title="Select Webcam Device" \
--column="ID" \
--column="Name" \
Expand All @@ -669,15 +693,22 @@ get_webcam_devices() {
--print-column=2,3 \
--width=500 \
--height=300)

if [ -n "$selected" ]; then
name="$(echo "$selected" | cut -d'|' -f1)"
device="$(echo "$selected" | cut -d'|' -f2)"
save_config "$name" "$device"
else
then
echo "No device selected" >&2
exit 1
fi

local name
local device
if ! name=$(echo "$selected" | cut -d'|' -f1); then
echo "Failed to parse device name" >&2
exit 1
fi
if ! device=$(echo "$selected" | cut -d'|' -f2); then
echo "Failed to parse device path" >&2
exit 1
fi
save_config "$name" "$device"
else
# Fallback to command line interface
echo "Available webcam devices:"
Expand All @@ -700,26 +731,31 @@ get_webcam_devices() {
fi
}


# Save configuration
save_config() {
local device=$2
local name=$1
# Create config directory if it doesn't exist
mkdir -p "${CONFIG_DIR}"

# Save with restrictive permissions
(
echo "qrwebcam=$device"
echo "qrcamname=$name"
)> "${CONFIG_FILE}"
chmod 600 "${CONFIG_FILE}"
if ! mkdir -p "${CONFIG_DIR}"; then
echo "Failed to create config directory" >&2
exit 1
fi
if ! (
echo "qrwebcam=$device"
echo "qrcamname=$name"
)> "${CONFIG_FILE}"; then
echo "Failed to write config file" >&2
exit 1
fi
if ! chmod 600 "${CONFIG_FILE}"; then
echo "Failed to set config file permissions" >&2
exit 1
fi

if command -v zenity &> /dev/null; then
zenity --info \
--icon="webcamoid" \
--title="Save Webcam $name" \
--text="Selected webcam: $name - $device"
--title="$name" \
--text="Selected Webcam: $name - $device"
else
echo "Selected webcam: $name - $device"
fi
Expand Down

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