CI: enable SVT-JPEG-XS

only for Win + non-ARM Linux - doesn't seem to be officially supported
in neither ARM nor macOS

configure.ac - require just SVT-JPEG-XS 0.9 as is in msys Win package
(proxy mode commented out - isn't needed to set to "proxy_mode_full"
explicitly, anyways)

Author: MartinPulec

.github/scripts/Linux/install_ffmpeg.sh

@@ -115,6 +115,7 @@ build_install() {
                 --enable-libspeex \
                 --enable-libsvtav1 \
                 --enable-libsvthevc \
+                --enable-libsvtjpegxs \
                 --enable-libsvtvp9 \
                 --enable-libvpl \
                 --enable-libvpx \

.github/scripts/Linux/install_others.sh

@@ -64,6 +64,16 @@ install_rav1e() {(
                 /usr/local/lib/pkgconfig/rav1e.pc
 )}
 
+install_svt_jpegxs() {(
+        git clone --depth 1 https://github.com/OpenVisualCloud/SVT-JPEG-XS
+        # when built in U22.04, the stack is set as executable for some reason,
+        # not in Arch, eg.
+        export LDFLAGS="-Wl,-z,noexecstack"
+        cmake -B SVT-JPEG-XS/build SVT-JPEG-XS
+        cmake --build SVT-JPEG-XS/build --parallel "$(nproc)"
+        sudo cmake --install SVT-JPEG-XS/build
+)}
+
 # FFmpeg master needs at least v1.3.277 as for 6th Mar '25
 install_vulkan() {(
         sudo apt build-dep libvulkan1
@@ -87,7 +97,7 @@ if [ $# -eq 1 ] && { [ "$1" = -h ] || [ "$1" = --help ] || [ "$1" = help ]; }; t
 fi
 
 if [ $# -eq 0 ] || [ $show_help ]; then
-        set -- gpujpeg ndi pipewire rav1e vulkan ximea
+        set -- gpujpeg ndi pipewire rav1e svt_jpegxs vulkan ximea
 fi
 
 if [ $show_help ]; then

.github/scripts/Linux/prepare.sh

@@ -35,6 +35,7 @@ sudo apt install libasound-dev libcaca-dev libjack-jackd2-dev libnatpmp-dev libv
 sudo apt install libopencv-core-dev libopencv-imgproc-dev
 sudo apt install libcurl4-openssl-dev # for RTSP client (vidcap)
 sudo apt install i965-va-driver-shaders libva-dev # instead of i965-va-driver
+sudo apt install nasm # for SVT-JPEG-XS
 
 sudo apt install qt6-base-dev qt6-wayland
 . /etc/os-release # source ID and VERSION_ID

.github/scripts/Windows/prepare_msys.sh

@@ -55,6 +55,7 @@ $PACMAN_INSTALL $m-asciidoc \
         $m-fluidsynth\
         $m-glew $m-glfw\
         $m-libnatpmp \
+        $m-svt-jpeg-xs \
         $m-vulkan-headers $m-vulkan-loader \
 
 $PACMAN_INSTALL $m-libsoxr $m-speexdsp

.github/scripts/environment.sh

@@ -95,7 +95,8 @@ case "$RUNNER_OS" in
                         FEATURES="$FEATURES --disable-qt"
                 else
                         FEATURES="$FEATURES $CUDA_FEATURES \
---enable-lavc-hw-accel-vdpau"
+                          --enable-lavc-hw-accel-vdpau \
+                          --enable-jpegxs"
                 fi
                 ;;
         macOS)
@@ -107,7 +108,11 @@ case "$RUNNER_OS" in
 "
                 ;;
         Windows)
-                FEATURES="$FEATURES $CUDA_FEATURES --enable-dshow --enable-spout --enable-wasapi"
+                FEATURES="$FEATURES $CUDA_FEATURES \
+                  --enable-dshow \
+                  --enable-jpegxs \
+                  --enable-spout \
+                  --enable-wasapi"
                 ;;
         *)
                 echo "Unexpected runner OS: ${RUNNER_OS:-(undefined)}" >&2

configure.ac

@@ -2408,7 +2408,7 @@ AC_ARG_ENABLE(jpegxs,
    [jpegxs_req=$build_default]
 )
 
-PKG_CHECK_MODULES([JPEGXS], [SvtJpegxs >= 0.10],
+PKG_CHECK_MODULES([JPEGXS], [SvtJpegxs >= 0.9],
     [FOUND_JPEGXS_DEP=yes],
     [FOUND_JPEGXS_DEP=no]
 )

src/video_decompress/jpegxs.cpp

@@ -159,7 +159,7 @@ static bool configure_with(struct state_decompress_jpegxs *s, unsigned char *bit
         s->decoder.verbose = VERBOSE_NONE;
         s->decoder.threads_num = get_cpu_core_count();
         s->decoder.use_cpu_flags = CPU_FLAGS_ALL;
-        s->decoder.proxy_mode = proxy_mode_full;
+        // s->decoder.proxy_mode = proxy_mode_full;
 
         SvtJxsErrorType_t err = svt_jpeg_xs_decoder_init(SVT_JPEGXS_API_VER_MAJOR, SVT_JPEGXS_API_VER_MINOR, &s->decoder, bitstream_buffer, codestream_size, &s->image_config);
         if (err != SvtJxsErrorNone) {