package/libjxl: new package

libjxl is the reference implementation of JPEG XL (encoder and decoder).

https://github.com/libjxl/libjxl

Signed-off-by: Julien Olivain <ju.o@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/package/test_libjxl.py

@@ -0,0 +1,53 @@
+import os
+
+import infra.basetest
+
+
+class TestLibJXL(infra.basetest.BRTest):
+    # infra.basetest.BASIC_TOOLCHAIN_CONFIG is not used as it is armv5
+    # and the image encoding would take too long (several minutes).
+    # We also add GraphicsMagick to generate and compare images for
+    # the test.
+    config = \
+        """
+        BR2_aarch64=y
+        BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
+        BR2_LINUX_KERNEL=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+        BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.15.79"
+        BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
+        BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux.config"
+        BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
+        BR2_TARGET_ROOTFS_CPIO=y
+        BR2_TARGET_ROOTFS_CPIO_GZIP=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        BR2_PACKAGE_GRAPHICSMAGICK=y
+        BR2_PACKAGE_LIBJXL=y
+        """
+
+    def test_run(self):
+        img = os.path.join(self.builddir, "images", "rootfs.cpio.gz")
+        kern = os.path.join(self.builddir, "images", "Image")
+        self.emulator.boot(arch="aarch64",
+                           kernel=kern,
+                           kernel_cmdline=["console=ttyAMA0"],
+                           options=["-M", "virt", "-cpu", "cortex-a57", "-m", "256M", "-initrd", img])
+        self.emulator.login()
+
+        ref = "/var/tmp/reference.ppm"
+        jxl = "/var/tmp/encoded.jxl"
+        dec = "/var/tmp/decoded.ppm"
+
+        cmd = "gm convert IMAGE:LOGO {}".format(ref)
+        self.assertRunOk(cmd)
+
+        cmd = "cjxl {} {}".format(ref, jxl)
+        self.assertRunOk(cmd, timeout=30)
+
+        cmd = "djxl {} {}".format(jxl, dec)
+        self.assertRunOk(cmd)
+
+        cmd = "gm compare -metric mse -maximum-error 1e-3 {} {}".format(
+            ref, dec)
+        self.assertRunOk(cmd)