sane-backends: update to 1.0.29

- Migrate libusb dependency back to libsane
  (virtually all useful backends for OpenWrt would need it anyway)
- Disabled new usb-record-replay feature (avoid libxml2 dep)
- Disabled new escl backend (network-only backend are not too useful
  for OpenWrt and it requires libcurl, libnetsnmp, libavahi and libxml2)
- Workaround sane-daemon/postinst installation on Imagebuild
- Enabled backends kvs40xx and mustek_usb2 (fixed upstream)
- Fix bigendian compilation
  (https://gitlab.com/sane-project/backends/-/merge_requests/329)
- Fix missing std::round() for uclibc
  (https://gitlab.com/sane-project/backends/issues/237)
- Fixes FS#2685: coldplug was running before usblp was loaded. Now
  it grants access do usblp when a device using it is plugged.

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>

utils/sane-backends/Makefile

@@ -1,6 +1,6 @@
 #
 # Copyright (C) 2006-2016 OpenWrt.org
-# Copyright (C) 2017-2019 Luiz Angelo Daros de Luca <luizluca@gmail.com>
+# Copyright (C) 2017-2020 Luiz Angelo Daros de Luca <luizluca@gmail.com>
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -9,11 +9,11 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=sane-backends
-PKG_VERSION:=1.0.28
-PKG_RELEASE:=2
+PKG_VERSION:=1.0.29
+PKG_RELEASE:=1
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
-PKG_SOURCE_URL:=https://gitlab.com/sane-project/backends/uploads/9e718daff347826f4cfe21126c8d5091/
-PKG_HASH:=31260f3f72d82ac1661c62c5a4468410b89fb2b4a811dabbfcc0350c1346de03
+PKG_SOURCE_URL:=https://gitlab.com/sane-project/backends/uploads/54f858b20a364fc35d820df935a86478
+PKG_HASH:=aa027b4e5f59849cd41b8c26d54584cf31fffd986049019be6ad4140e11ea8ed
 PKG_MAINTAINER:=Luiz Angelo Daros de Luca <luizluca@gmail.com>
 PKG_LICENSE:=GPL-2.0 GPL-2.0-or-later
 PKG_LICENSE_FILES:=COPYING LICENSE
@@ -136,13 +136,19 @@ endef
 # Run hotplug to grant access to existing scanners
 define Package/sane-daemon/postinst
 #!/bin/sh
-udevtrigger
+# We only need udevtrigger to have the magic work without
+# rebooting on a real system.  In ImageBuilder or
+# the like, the boot process will call udevtrigger.
+if [ -z "$${IPKG_INSTROOT}" ]; then
+	udevtrigger
+fi
 endef
 
 define Package/libsane
   $(call Package/sane-backends/Default)
   SECTION:=libs
   CATEGORY:=Libraries
+  DEPENDS+=+libusb-1.0
   TITLE+= (libraries)
 endef
 
@@ -171,6 +177,7 @@ CONFIGURE_ARGS+= \
 	--without-snmp \
 	--disable-avahi \
 	--disable-locking \
+	--without-usb-record-replay \
 
 # ./configure does not even try to detect mmap if crosscompiling
 CONFIGURE_VARS+= \
@@ -314,6 +321,7 @@ $(eval $(call SaneBackend,epjitsu,Epson-based Fujitsu USB scanners,+libusb-1.0))
 $(eval $(call SaneBackend,epson,EPSON scanners,+libusb-1.0))
 $(eval $(call SaneBackend,epsonds,EPSON scanners,+libjpeg +libusb-1.0)) ####
 $(eval $(call SaneBackend,epson2,EPSON scanners,+libusb-1.0))
+#$(eval $(call SaneBackend,escl,AirScan/eSCL devices,+libcurl +libxml2 +libnetsnmp +libavahi))
 $(eval $(call SaneBackend,fujitsu,Fujitsu flatbed and ADF scanners,+libusb-1.0))
 $(eval $(call SaneBackend,genesys,GL646 GL841 GL843 GL847 and GL124 based USB flatbed scanners,+libstdcpp +libusb-1.0))
 $(eval $(call SaneBackend,gphoto2,digital cameras supported by gphoto2,+libjpeg +libgphoto2))
@@ -333,8 +341,7 @@ $(eval $(call SaneBackend,kodak,big Kodak flatbed and ADF scanners,+libusb-1.0))
 $(eval $(call SaneBackend,kodakaio,Kodak aio printer / scanners,+libusb-1.0))
 $(eval $(call SaneBackend,kvs1025,Panasonic KV-S102xC USB ADF scanners,+libusb-1.0))
 $(eval $(call SaneBackend,kvs20xx,Panasonic KV-S20xxC USB/SCSI ADF scanners,+libusb-1.0))
-# https://gitlab.com/sane-project/backends/issues/153
-#$(eval $(call SaneBackend,kvs40xx,Panasonic KV-S40xxC USB/SCSI ADF scanners,+libpthread +libusb-1.0))
+$(eval $(call SaneBackend,kvs40xx,Panasonic KV-S40xxC USB/SCSI ADF scanners,+libpthread +libusb-1.0))
 $(eval $(call SaneBackend,leo,LEO Technologies scanners))
 $(eval $(call SaneBackend,lexmark,Lexmark X1100/X1200 Series scanners,+libusb-1.0))
 $(eval $(call SaneBackend,ma1509,Mustek BearPaw 1200F USB scanner,+libusb-1.0))
@@ -346,8 +353,7 @@ $(eval $(call SaneBackend,mustek,Mustek SCSI flatbed scanners and some other dev
 # Depends on libieee1284
 #$(eval $(call SaneBackend,mustek_pp,Mustek parallel port flatbed scanners,+libieee1284))
 $(eval $(call SaneBackend,mustek_usb,Mustek USB flatbed scanners,+libusb-1.0))
-# https://gitlab.com/sane-project/backends/issues/153
-#$(eval $(call SaneBackend,mustek_usb2,SQ113 based USB flatbed scanners,+libpthread +libusb-1.0))
+$(eval $(call SaneBackend,mustek_usb2,SQ113 based USB flatbed scanners,+libpthread +libusb-1.0))
 $(eval $(call SaneBackend,nec,NEC scanners))
 $(eval $(call SaneBackend,net,network backend))
 $(eval $(call SaneBackend,niash,scanners based on the NIASH chipset,+libusb-1.0))

utils/sane-backends/files/saned.hotplug

@@ -1,27 +1,28 @@
 #!/bin/sh
 
-[ "$ACTION" = "add" ] || exit 0
-[ "$DEVTYPE" = "usb_device" ] || exit 0
+[ "$ACTION" != "remove" ] || exit 0
 
 SANE_GROUP=scanner
 grep -q -E "^$SANE_GROUP:" /etc/group || exit 0
 
-# Filter SANE known devices
-vendor_product="${PRODUCT%/*}"
-vendorid="$(printf '%04x' "0x0${vendor_product%/*}")"
-productid="$(printf '%04x' "0x0${vendor_product#*/}")"
-grep -s -x -F -q "$productid" "/usr/share/sane/$vendorid"-*.usbid || exit 0
-
 grant() {
-	logger -t "hotplug(usb/20-saned)" "Granting $1 to '$2' for group '$SANE_GROUP'"
+	echo "hotplug(usb/20-saned): Granting $1 to '$2' for group '$SANE_GROUP'" >/dev/kmsg
 	chgrp "$SANE_GROUP" "$2"
 	chmod "$1" "$2"
 }
 
-# Needed by script /usr/bin/saned to rebind USB devices back to usblp after use
 usblp_bind="/sys/bus/usb/drivers/usblp/bind"
-if [ -e "$usblp_bind" ]; then
-	grant g+w "$usblp_bind"
+if [ "$DEVTYPE" = "usb_device" ]; then
+	# Filter SANE known devices
+	vendor_product="${PRODUCT%/*}"
+	vendorid="$(printf '%04x' "0x0${vendor_product%/*}")"
+	productid="$(printf '%04x' "0x0${vendor_product#*/}")"
+	grep -s -x -F -q "$productid" "/usr/share/sane/$vendorid"-*.usbid || exit 0
+	grant g+rw "/dev/$DEVNAME"
+elif [ "$DEVTYPE" = "usb_interface" ] && [ "$DRIVER" = 'usblp' ]; then
+	# Needed by script /usr/bin/saned to rebind USB devices back to usblp after use
+	if [ -e "$usblp_bind" ]; then
+		grant g+w "$usblp_bind"
+	fi
 fi
 
-grant g+rw "/dev/$DEVNAME"

utils/sane-backends/patches/002-remove-uneeded.patch

@@ -1,11 +1,11 @@
 --- a/Makefile.in
 +++ b/Makefile.in
-@@ -442,7 +442,7 @@ target_alias = @target_alias@
+@@ -448,7 +448,7 @@ target_alias = @target_alias@
  top_build_prefix = @top_build_prefix@
  top_builddir = @top_builddir@
  top_srcdir = @top_srcdir@
 -SUBDIRS = include lib sanei backend frontend tools doc po testsuite
 +SUBDIRS = include lib sanei backend frontend
  DIST_SUBDIRS = include lib sanei backend frontend tools doc po japi testsuite
- dist_doc_DATA = AUTHORS ChangeLog COPYING LICENSE NEWS PROBLEMS PROJECTS \
-  README README.aix README.beos README.darwin README.djpeg README.freebsd \
+ dist_doc_DATA = AUTHORS COPYING LICENSE NEWS PROBLEMS PROJECTS README \
+ 	README.aix README.beos README.darwin README.djpeg \

utils/sane-backends/patches/100-fix-bigendian.patch

@@ -0,0 +1,21 @@
+From e1934720c687ed8c6125c75ac658f55b4e1513ce Mon Sep 17 00:00:00 2001
+From: Luiz Angelo Daros de Luca <luizluca@gmail.com>
+Date: Sun, 2 Feb 2020 21:19:15 -0300
+Subject: [PATCH] genesys: fix bigendian build
+
+Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
+---
+ backend/genesys/low.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/backend/genesys/low.cpp
++++ b/backend/genesys/low.cpp
+@@ -539,7 +539,7 @@ Image read_unshuffled_image_from_scanner
+     }
+ 
+ #ifdef WORDS_BIGENDIAN
+-    if (depth == 16) {
++    if (session.params.depth == 16) {
+         dev->pipeline.push_node<ImagePipelineNodeSwap16BitEndian>();
+     }
+ #endif

utils/sane-backends/patches/101-fix_uclibc_std_rand.patch

@@ -0,0 +1,16 @@
+https://gitlab.com/sane-project/backends/issues/237
+
+--- a/backend/genesys/image_pipeline.cpp
++++ b/backend/genesys/image_pipeline.cpp
+@@ -703,7 +703,11 @@ bool ImagePipelineNodeCalibrate::get_nex
+ 
+             float value_f = static_cast<float>(value) / max_value;
+             value_f = (value_f - offset_[curr_calib_i]) * multiplier_[curr_calib_i];
++#if defined(__UCLIBC__)
++            value_f = round(value_f * max_value);
++#else
+             value_f = std::round(value_f * max_value);
++#endif
+             value = clamp<std::int32_t>(static_cast<std::int32_t>(value_f), 0, max_value);
+             set_raw_channel_to_row(out_data, x, ch, value, format);
+