KASM-7125 fixed issue with rebuilding Xvnc, switched to simplier webp mix math.

builder/build.sh

@@ -76,19 +76,22 @@ if [ ! -d unix/xserver/include ]; then
         patch -s -p0 < ../CVE-2022-2320-v1.19.patch
         ;;
   esac
+else
+  cd unix/xserver
+fi
 
-  autoreconf -i
+autoreconf -i
-  # Configuring Xorg is long and has many distro-specific paths.
+# Configuring Xorg is long and has many distro-specific paths.
-  # The distro paths start after prefix and end with the font path,
+# The distro paths start after prefix and end with the font path,
-  # everything after that is based on BUILDING.txt to remove unneeded
+# everything after that is based on BUILDING.txt to remove unneeded
-  # components.
+# components.
-  # remove gl check for opensuse
+# remove gl check for opensuse
-  if [ "${KASMVNC_BUILD_OS}" == "opensuse" ] || ([ "${KASMVNC_BUILD_OS}" == "oracle" ] && [ "${KASMVNC_BUILD_OS_CODENAME}" == 9 ]); then
+if [ "${KASMVNC_BUILD_OS}" == "opensuse" ] || ([ "${KASMVNC_BUILD_OS}" == "oracle" ] && [ "${KASMVNC_BUILD_OS_CODENAME}" == 9 ]); then
   sed -i 's/LIBGL="gl >= 7.1.0"/LIBGL="gl >= 1.1"/g' configure
-  fi
+fi
 
-  # build X11
+# build X11
-  ./configure \
+./configure \
     --disable-config-hal \
     --disable-config-udev \
     --disable-dmx \
@@ -112,9 +115,9 @@ if [ ! -d unix/xserver/include ]; then
     --with-xkb-output=/var/lib/xkb \
     --with-xkb-path=/usr/share/X11/xkb "${CONFIG_OPTIONS}"
 
-  # remove array bounds errors for new versions of GCC
+# remove array bounds errors for new versions of GCC
-  find . -name "Makefile" -exec sed -i 's/-Werror=array-bounds//g' {} \;
+find . -name "Makefile" -exec sed -i 's/-Werror=array-bounds//g' {} \;
-fi
+
 
 make -j"$(nproc)"
 

common/rfb/EncodeManager.cxx

@@ -360,7 +360,6 @@ void EncodeManager::doUpdate(bool allowLossy, const Region& changed_,
     int nRects;
     Region changed, cursorRegion;
     struct timeval start;
-    unsigned screenArea;
 
     updates++;
     if (conn->cp.supportsUdp)
@@ -390,17 +389,7 @@ void EncodeManager::doUpdate(bool allowLossy, const Region& changed_,
     memset(&webpstats, 0, sizeof(codecstats_t));
 
     if (allowLossy && activeEncoders[encoderFullColour] == encoderTightWEBP) {
-        const unsigned rate = 1024 * 1000 / rfb::Server::frameRate;
+        webpFallbackUs = (1000 * 1000 / rfb::Server::frameRate) * (static_cast<double>(Server::webpEncodingTime) / 100.0);
-
-        screenArea = pb->getRect().width() * pb->getRect().height();
-        screenArea *= 1024;
-        screenArea /= 256 * 256;
-        screenArea *= webpBenchResult;
-        screenArea /=  Server::webpEncodingTime;
-        // Encoding the entire screen would take this many 1024*msecs, worst case
-
-        // Calculate how many us we can send webp for, before switching to jpeg
-        webpFallbackUs = rate * rate / screenArea;
     }
 
     /*
@@ -884,7 +873,7 @@ void EncodeManager::findSolidRect(const Rect& rect, Region *changed,
 void EncodeManager::checkWebpFallback(const timeval *start) {
     // Have we taken too long for the frame? If so, drop from WEBP to JPEG
     if (start && activeEncoders[encoderFullColour] == encoderTightWEBP && !webpTookTooLong.load(std::memory_order_relaxed)) {
-        const auto us = msSince(start) * 1024;
+        const auto us = msSince(start) * 1000;
         if (us > webpFallbackUs)
             webpTookTooLong.store(true, std::memory_order_relaxed);
     }

common/rfb/ServerCore.cxx

@@ -290,5 +290,5 @@ rfb::PresetParameter rfb::Server::preferBandwidth
 
 rfb::IntParameter rfb::Server::webpEncodingTime
 ("webpEncodingTime",
- "Sets a weighted value that determines how much webp is used to balance bandwidth and CPU usage.",
+ "Percentage of time allotted for encoding a frame, that can be used for encoding rects in webp.",
- 1, 1, 1000);
+ 30, 0, 100);

unix/kasmvnc_defaults.yaml

@@ -129,7 +129,7 @@ encoding:
     logging:
       level: off
     scaling_algorithm: progressive_bilinear
-    webp_encoding_time: auto
+    webp_encoding_time: 30
 
   compare_framebuffer: auto
   zrle_zlib_level: auto

unix/vncserver

@@ -2073,21 +2073,9 @@ sub DefineConfigToCLIConversion {
         configKeys => [
           KasmVNC::ConfigKey->new({
             name => "encoding.video_encoding_mode.webp_encoding_time",
-                validator => KasmVNC::PatternValidator->new({
+            type => KasmVNC::ConfigKey::INT
-                              pattern => qr/^(auto|[1-9][0-9]{0,2}|1000)$/,
-                              errorMessage => "must be 'auto' or a number in 1..1000"
-                            }),
           })
-            ],
+        ]
-            deriveValueSub => sub {
-              my $self = shift;
-              my $value = $self->configValue();
-
-              if ($value eq "auto") {
-                $value = 1;
-              }
-              $value;
-            }
     }),
     KasmVNC::CliOption->new({
         name => 'CompareFB',