utils/rkisp1/rkisp1-capture.sh


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#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2019, Google Inc.
#
# Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
#
# rkisp-capture.sh - Capture processed frames from cameras based on the
# Rockchip ISP1
#
# 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)
# - raw2rgbpnm (from git://git.retiisi.org.uk/~sailus/raw2rgbpnm.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
	local name=$1

	for mdev in /dev/media* ; do
		media-ctl -d $mdev -p | grep -q "^driver[ \t]*$name$" && break
		mdev=
	done

	if [[ -z $mdev ]] ; then
		echo "$name media device not found." >&2
		exit 1
	fi

	echo $mdev
}

# Get the sensor format
get_sensor_format() {
	local format
	local sensor=$1

	format=$($mediactl --get-v4l2 "'$sensor':0" | sed 's/\[\([^ ]*\).*/\1/')
	sensor_mbus_code=$(echo $format | sed 's/fmt:\([A-Z0-9_]*\).*/\1/')
	sensor_size=$(echo $format | sed 's/[^\/]*\/\([0-9x]*\).*/\1/')

	echo "Capturing ${sensor_size} from sensor $sensor in ${sensor_mbus_code}"
}

# Configure the pipeline
configure_pipeline() {
	local format="fmt:$sensor_mbus_code/$sensor_size"
	local capture_mbus_code=$1
	local capture_size=$2

	echo "Configuring pipeline for $sensor in $format"

	$mediactl -r

	$mediactl -l "'$sensor':0 -> 'rkisp1_isp':0 [1]"
	$mediactl -l "'rkisp1_isp':2 -> 'rkisp1_resizer_mainpath':0 [1]"

	$mediactl -V "\"$sensor\":0 [$format]"
	$mediactl -V "'rkisp1_isp':0 [$format crop:(0,0)/$sensor_size]"
	$mediactl -V "'rkisp1_isp':2 [fmt:$capture_mbus_code/$sensor_size crop:(0,0)/$sensor_size]"
	$mediactl -V "'rkisp1_resizer_mainpath':0 [fmt:$capture_mbus_code/$sensor_size crop:(0,0)/$sensor_size]"
	$mediactl -V "'rkisp1_resizer_mainpath':1 [fmt:$capture_mbus_code/$capture_size]"
}

# Capture frames
capture_frames() {