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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2018, Google Inc.
#
# Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
#
# ipu3-capture.sh - Capture raw frames from cameras based on the Intel IPU3
#
# The scripts makes use of the following tools, which are expected to be
# executable from the system-wide path or from the local directory:
#
# - media-ctl (from v4l-utils git://linuxtv.org/v4l-utils.git)
# - raw2pnm (from nvt https://github.com/intel/nvt.git)
# - yavta (from git://git.ideasonboard.org/yavta.git)
# Locate the sensor entity
find_sensor() {
local bus
local sensor_name=$1
bus=$(grep "$sensor_name" /sys/class/video4linux/v4l-subdev*/name | cut -d ' ' -f 2)
if [[ -z $bus ]]; then
echo "Sensor '$sensor_name' not found." >&2
exit 1
fi
echo "$sensor_name $bus"
}
# Locate the media device
find_media_device() {
local mdev
for mdev in /dev/media* ; do
media-ctl -d $mdev -p | grep -q "^driver[ \t]*ipu3-cio2$" && break
mdev=
done
if [[ -z $mdev ]] ; then
echo "IPU3 media device not found." >&2
exit 1
fi
echo $mdev
}
# Locate the CSI2 and CIO2 and get the sensor format
parse_pipeline() {
local cio2_queue
local resolution
local sensor=$1
read cio2_queue bus_format sensor_size <<< $($mediactl -p | awk "
/^- entity [0-9]*:/ {
sensor=0;
}
/^- entity [0-9]*: $sensor/ {
sensor=1;
}
/^[ \t]*(stream:0)?\[fmt:/ {
if (sensor) {
gsub(\".*fmt:\", \"\");
gsub(\"[] ].*\", \"\");
gsub(\"/\", \" \");
format=\$0;
}
}
/^[ \t]*->/ {
if (sensor)
cio2=substr(\$3, 0, 1);
}
END {
print cio2 \" \" format;
}
")
ipu3_csi2="ipu3-csi2 $cio2_queue"
ipu3_capture="ipu3-cio2 $cio2_queue"
sensor_width=$(echo $sensor_size | cut -d 'x' -f 1)
sensor_height=$(echo $sensor_size | cut -d 'x' -f 2)
echo "Using device $mdev with IPU3 CIO2 queue $cio2_queue"
}
# Configure the pipeline
configure_pipeline() {
local format="fmt:$bus_format/$sensor_size"
echo "Configuring pipeline for $sensor in $format"
$mediactl -r
$mediactl -l "\"$sensor\":0 -> \"$ipu3_csi2\":0[1]"
$mediactl -l "\"$ipu3_csi2\":1 -> \"$ipu3_capture\":0[1]"
$mediactl -V "\"$sensor\":0 [$format]"
$mediactl -V "\"$ipu3_csi2\":1 [$format]"
}
# Capture frames
capture_frames() {
local file_op
local frame_count=$1
local ipu3_format=IPU3_${bus_format/_1X10/}
local save_file=$2
if [[ $save_file -eq 1 ]]; then
file_op="--file=/tmp/frame-#.bin"
fi
yavta -c$frame_count -n5 -I -f $ipu3_format -s $sensor_size $file_op \
$($mediactl -e "$ipu3_capture")
}
# Convert captured files to ppm
convert_files() {
local frame_count=$1
local format=${bus_format/_1X10/}
local padded_width=$(expr \( $sensor_width + 49 \) / 50 \* 50)
echo "Converting ${sensor_width}x${sensor_height} (${padded_width}x${sensor_height})"
for i in `seq -f '%06.0f' 0 $(($frame_count - 1))`; do
ipu3-unpack /tmp/frame-$i.bin /tmp/frame-$i.raw
raw2pnm -x$padded_width -y$sensor_height -f$format /tmp/frame-$i.raw /tmp/frame-$i.ppm
done
}
# Print usage message
usage() {
echo "Usage: $1 [options] sensor-name"
echo "Supported options:"
echo "-c,--count n Number of frame to capture"
echo "--no-save Do not save captured frames to disk"
}
# Parse command line arguments
frame_count=10
save_file=1
while (( "$#" )) ; do
case $1 in
-c|--count)
frame_count=$2
shift 2
;;
--no-save)
save_file=0
shift
;;
-*)
echo "Unsupported option $1" >&2
usage $0
exit 1
;;
*)
break
;;
esac
done
if [[ $# -ne 1 ]] ; then
usage $0
exit 1
fi
sensor_name=$1
sensor=$(find_sensor $sensor_name) || exit
mdev=$(find_media_device) || exit
mediactl="media-ctl -d $mdev"
parse_pipeline $sensor
configure_pipeline
capture_frames $frame_count $save_file
[[ $save_file -eq 1 ]] && convert_files $frame_count
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