From d03df074f7920203c6f880ad0fce3fecb7669f68 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?V=C3=ADctor=20Manuel=20J=C3=A1quez=20Leal?=
 <vjaquez@igalia.com>
Date: Wed, 4 Jan 2023 13:23:45 +0100
Subject: [PATCH] vulkan: detect vulkan video extensions

Also adds a meson option to enable them.

The symbol GST_VULKAN_HAVE_VIDEO_EXTENSIONS is an alias of
defined(VK_VERSION_1_4) || (defined(VK_VERSION_1_3) && VK_HEADER_VERSION >= 238
if the option is allowed.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4351>
---
 .../gst-libs/gst/vulkan/gstvkconfig.h.meson   |  1 +
 .../gst-libs/gst/vulkan/meson.build           | 30 +++++++++++++++++++
 subprojects/gst-plugins-bad/meson_options.txt |  4 +++
 3 files changed, 35 insertions(+)

diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/vulkan/gstvkconfig.h.meson b/subprojects/gst-plugins-bad/gst-libs/gst/vulkan/gstvkconfig.h.meson
index 638543edbc..ea03906bc6 100644
--- a/subprojects/gst-plugins-bad/gst-libs/gst/vulkan/gstvkconfig.h.meson
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/vulkan/gstvkconfig.h.meson
@@ -16,6 +16,7 @@ G_BEGIN_DECLS
 #mesondefine GST_VULKAN_HAVE_WINDOW_IOS
 #mesondefine GST_VULKAN_HAVE_WINDOW_WIN32
 #mesondefine GST_VULKAN_HAVE_WINDOW_ANDROID
+#mesondefine GST_VULKAN_HAVE_VIDEO_EXTENSIONS
 
 G_END_DECLS
 
diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/vulkan/meson.build b/subprojects/gst-plugins-bad/gst-libs/gst/vulkan/meson.build
index f2b34e377e..d3c1c5e971 100644
--- a/subprojects/gst-plugins-bad/gst-libs/gst/vulkan/meson.build
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/vulkan/meson.build
@@ -95,6 +95,7 @@ vulkan_conf_options = [
     'GST_VULKAN_HAVE_WINDOW_IOS',
     'GST_VULKAN_HAVE_WINDOW_WIN32',
     'GST_VULKAN_HAVE_WINDOW_ANDROID',
+    'GST_VULKAN_HAVE_VIDEO_EXTENSIONS',
 ]
 
 foreach option : vulkan_conf_options
@@ -304,6 +305,35 @@ if not vulkan_dep.found() or not has_vulkan_header or not glslc.found()
   endif
 endif
 
+if get_option('vulkan-video').allowed()
+  video_test = '''
+#include <vulkan/vulkan.h>
+
+#if !(defined(VK_VERSION_1_4) || (defined(VK_VERSION_1_3) && VK_HEADER_VERSION >= 238))
+#error "Need at least Vulkan 1.3.238"
+#endif
+
+/* vk_video/vulkan_video_codec_h264std.h */
+static StdVideoH264SequenceParameterSet h264_sps;
+static StdVideoH264PictureParameterSet h264_pps;
+
+/* vk_video/vulkan_video_codec_h265std.h */
+static StdVideoH265SequenceParameterSet h265_sps;
+static StdVideoH265PictureParameterSet h265_pps;
+'''
+
+  if vulkan_inc_dir != ''
+    have_vk_video = cc.compiles(video_test, dependencies : vulkan_dep,  args: '-I' + vulkan_inc_dir)
+  else
+    have_vk_video = cc.compiles(video_test, dependencies : vulkan_dep)
+  endif
+  if have_vk_video
+    vulkan_conf.set('GST_VULKAN_HAVE_VIDEO_EXTENSIONS', 1)
+  elif get_option('vulkan-video').enabled()
+    error('Vulkan Video extensions headers not found')
+  endif
+endif
+
 gen_sources = []
 
 install_headers(vulkan_headers, subdir : 'gstreamer-1.0/gst/vulkan')
diff --git a/subprojects/gst-plugins-bad/meson_options.txt b/subprojects/gst-plugins-bad/meson_options.txt
index 16c594b07f..74d02791dc 100644
--- a/subprojects/gst-plugins-bad/meson_options.txt
+++ b/subprojects/gst-plugins-bad/meson_options.txt
@@ -214,6 +214,10 @@ option('mfx_api', type : 'combo', choices : ['MSDK', 'oneVPL', 'auto'], value :
 option('mfx-modules-dir', type: 'string', value : '',
        description : 'libmfx runtime module dir, linux only')
 
+# Vulkan plugin options
+option('vulkan-video', type: 'feature', value: 'auto',
+       description: 'Whether to use Vulkan Video Extensions')
+
 # License-related feature options
 option('gpl', type: 'feature', value: 'disabled', yield: true,
   description: 'Allow build plugins that have (A)GPL-licensed dependencies')