package/libplacebo: add libplacebo package

This patch adds libplacebo package that is used
by mpv player.
libplacebo is the core rendering algorithms and
ideas of mpv rewritten as an independent library
and contains a large assortment of video processing
shaders, focusing on both quality and performance.

Signed-off-by: Javad Rahimipetroudi <javad.rahimipetroudi@mind.be>
Tested-by: Sen Hastings <sen@hastings.org>
[Bernd:
- bumped to v7.351.0
- moved Kconfig option to Multimedia (Sen)
- rebased patch 0001 after version bump
- added project URL to Config.in helptext
- removed redundancy in Config.in comment
- added comment to hash file
- switched _SITE to official repo
- added patch to fix build error with latest python3]

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -435,6 +435,7 @@ F:	package/libnpth/
 F:	package/libogg/
 F:	package/libopenh264/
 F:	package/libpciaccess/
+F:	package/libplacebo/
 F:	package/libplatform/
 F:	package/libpng/
 F:	package/libsidplay2/

package/Config.in

@@ -1981,6 +1981,7 @@ menu "Multimedia"
 	source "package/libopenaptx/Config.in"
 	source "package/libopenh264/Config.in"
 	source "package/libopusenc/Config.in"
+	source "package/libplacebo/Config.in"
 	source "package/libtheora/Config.in"
 	source "package/libudfread/Config.in"
 	source "package/libvpx/Config.in"

package/libplacebo/0001-meson.build-fix-linker-error-in-uclibc-sparc.patch

@@ -0,0 +1,45 @@
+From 4386f3e3b3d02c55776e3f674d8447fd24388c2c Mon Sep 17 00:00:00 2001
+From: Javad Rahimipetroudi <javad.rahimipetroudi@mind.be>
+Date: Fri, 19 Jul 2024 07:02:48 +0200
+Subject: [PATCH] meson.build: add libatomic dependency if needed
+
+This PR fixes the problem related to not finding the libatomic during the
+build. Some combinations or architecture and libc (e.g. uClibc on SPARC)
+operations in a separate library and don't link with it automatically.
+An optional find_library to meson.build has been added to 
+discover this.
+
+
+Fixes:
+ - https://github.com/haasn/libplacebo/issues/278
+
+Signed-off-by: Javad Rahimipetroudi <javad.rahimipetroudi@mind.be>
+Upstream: https://github.com/haasn/libplacebo/commit/4386f3e3b3d02c55776e3f674d8447fd24388c2c
+---
+ meson.build | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/meson.build b/meson.build
+index a73e49ff..f8cbf9f1 100644
+--- a/meson.build
++++ b/meson.build
+@@ -450,6 +450,7 @@ add_project_link_arguments(link_args, language: ['c', 'cpp'])
+ # Global dependencies
+ fs = import('fs')
+ libm = cc.find_library('m', required: false)
++atomic = cc.find_library('atomic', required: false)
+ thirdparty = meson.project_source_root()/'3rdparty'
+ python = import('python').find_installation()
+ python_env = environment()
+@@ -475,7 +476,7 @@ else
+     )
+ endif
+ 
+-build_deps = [ libm, threads ]
++build_deps = [ libm, threads, atomic]
+ 
+ subdir('tools')
+ subdir('src')
+-- 
+2.45.2
+

package/libplacebo/0002-src-pl_assert.h-add-static_assert-define-for-ulibc.patch

@@ -0,0 +1,36 @@
+From 0182e2b94bbc6bb964f96527d18e93c9b4709a3a Mon Sep 17 00:00:00 2001
+From: Javad Rahimipetroudi <javad.rahimipetroudi@mind.be>
+Date: Fri, 19 Jul 2024 07:57:45 +0200
+Subject: [PATCH] src/pl_assert.h:add static_assert define for ulibc
+
+This PR adds the static_assert macro defination for uClibc that is
+missed in some platforms. However, it is limited to C versions lower
+than C23. From C23, static_assert is not defined as macro anymore:
+https://en.cppreference.com/w/c/language/_Static_assert
+
+Signed-off-by: Javad Rahimipetroudi <javad.rahimipetroudi@mind.be>
+Upstream: https://github.com/haasn/libplacebo/commit/0182e2b94bbc6bb964f96527d18e93c9b4709a3a
+---
+ src/pl_assert.h | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/src/pl_assert.h b/src/pl_assert.h
+index b4c6656c..de9d3547 100644
+--- a/src/pl_assert.h
++++ b/src/pl_assert.h
+@@ -20,6 +20,12 @@
+ #include <stdio.h>
+ #include <assert.h>
+ 
++#if !defined (__cplusplus)
++#if (__STDC_VERSION__ < 202301L)
++#define static_assert _Static_assert
++#endif
++#endif
++
+ #ifndef NDEBUG
+ # define pl_assert assert
+ #else
+-- 
+2.45.2
+

package/libplacebo/0003-vulkan-utils_gen-fix-for-python-3.14.patch

@@ -0,0 +1,31 @@
+From a22f0dff5fe89385155743a1735b146babfdb131 Mon Sep 17 00:00:00 2001
+From: Nicolas Chauvet <kwizart@gmail.com>
+Date: Tue, 29 Jul 2025 11:42:35 +0200
+Subject: [PATCH] vulkan/utils_gen: fix for python 3.14
+
+Python 3.14+ has added more type checking. This patch fixes usage
+
+Fixes: https://github.com/haasn/libplacebo/issues/335
+
+Upstream: https://code.videolan.org/videolan/libplacebo/-/commit/12509c0f1ee8c22ae163017f0a5e7b8a9d983a17
+
+Signed-off-by: Nicolas Chauvet <kwizart@gmail.com>
+Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
+---
+ src/vulkan/utils_gen.py | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/vulkan/utils_gen.py b/src/vulkan/utils_gen.py
+index 9a97d35f..9b803d82 100644
+--- a/src/vulkan/utils_gen.py
++++ b/src/vulkan/utils_gen.py
+@@ -202,7 +202,8 @@ def find_registry_xml(datadir):
+     if not xmlfile or xmlfile == '':
+         xmlfile = find_registry_xml(datadir)
+ 
+-    registry = VkXML(ET.parse(xmlfile))
++    tree = ET.parse(xmlfile)
++    registry = VkXML(tree.getroot())
+     with open(outfile, 'w') as f:
+         f.write(TEMPLATE.render(
+             vkresults = get_vkenum(registry, 'VkResult'),

package/libplacebo/Config.in

@@ -0,0 +1,21 @@
+config BR2_PACKAGE_LIBPLACEBO
+	bool "libplacebo"
+	depends on BR2_TOOLCHAIN_HAS_THREADS_NPTL
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_10 # C++20
+	depends on BR2_TOOLCHAIN_HAS_ATOMIC
+	depends on !BR2_STATIC_LIBS # needs <dlfcn.h>
+	help
+	  libplacebo is, in a nutshell, the core rendering algorithms
+	  and ideas of mpv rewritten as an independent library. As of
+	  today, libplacebo contains a large assortment of video
+	  processing shaders, focusing on both quality and
+	  performance.
+
+	  https://libplacebo.org
+
+comment "libplacebo needs a toolchain w/ C++, dynamic library, NPTL threads, gcc >= 10"
+	depends on BR2_USE_MMU
+	depends on BR2_TOOLCHAIN_HAS_ATOMIC
+	depends on !BR2_INSTALL_LIBSTDCPP || BR2_STATIC_LIBS || \
+		!BR2_TOOLCHAIN_HAS_THREADS_NPTL || BR2_TOOLCHAIN_GCC_AT_LEAST_10

package/libplacebo/libplacebo.hash

@@ -0,0 +1,3 @@
+# Locally computed
+sha256  46b501842e5b18867c6b7dd5c901e65ad6396608ad76309c366d8ace8be0d0d7  libplacebo-v7.351.0-git4.tar.gz
+sha256  b3aa400aca6d2ba1f0bd03bd98d03d1fe7489a3bbb26969d72016360af8a5c9d  LICENSE

package/libplacebo/libplacebo.mk

@@ -0,0 +1,15 @@
+################################################################################
+#
+# libplacebo
+#
+################################################################################
+
+LIBPLACEBO_VERSION = v7.351.0
+LIBPLACEBO_SITE = https://code.videolan.org/videolan/libplacebo.git
+LIBPLACEBO_SITE_METHOD = git
+LIBPLACEBO_GIT_SUBMODULES = YES
+LIBPLACEBO_LICENSE = LGPL-2.1
+LIBPLACEBO_LICENSE_FILES = LICENSE
+LIBPLACEBO_INSTALL_STAGING = YES
+
+$(eval $(meson-package))