add support for vulkan

.github/workflows/build.yml

@@ -14,7 +14,7 @@ jobs:
         ffmpeg_version: ['3.3', '3.4', '4.0', '4.1', '4.2', '4.3', '4.4', '5.0', '5.1', '6.0', '6.1', '7.0']
       fail-fast: false
     env:
-      FEATURES: avcodec,avdevice,avfilter,avformat,postproc,swresample,swscale
+      FEATURES: avcodec,avdevice,avfilter,avformat,postproc,swresample,swscale,vulkan
     steps:
       - uses: actions/checkout@v2
       - name: Install dependencies
@@ -48,7 +48,7 @@ jobs:
     strategy:
       fail-fast: false
     env:
-      FEATURES: avcodec,avdevice,avfilter,avformat,swresample,swscale #,postproc
+      FEATURES: avcodec,avdevice,avfilter,avformat,swresample,swscale,vulkan #,postproc
       FFMPEG_DIR: /home/runner/work/rust-ffmpeg-sys/rust-ffmpeg-sys/ffmpeg-7.1-linux-clang-default
     steps:
       - uses: actions/checkout@v2

Cargo.toml

@@ -17,6 +17,7 @@ doctest = false
 
 [dependencies]
 libc = "0.2"
+ash = { version = "0.38.0", optional = true}
 
 [build-dependencies]
 num_cpus   = "1.16"
@@ -109,3 +110,4 @@ avresample = []
 postproc   = []
 swresample = []
 swscale    = []
+vulkan     = ["ash"]

build.rs

@@ -1244,6 +1244,11 @@ fn main() {
         .blocklist_function("y0l")
         .blocklist_function("y1l")
         .blocklist_function("ynl")
+        .blocklist_file("vulkan.h")
+        .blocklist_type("^Vk[A-Z].*")
+        .blocklist_function("^vk[A-Z].*")
+        .blocklist_type("^PFN_vk[A-Z].*")
+        .blocklist_var("^VK_.*")
         .opaque_type("__mingw_ldbl_type_t")
         .default_enum_style(bindgen::EnumVariation::Rust {
             non_exhaustive: env::var("CARGO_FEATURE_NON_EXHAUSTIVE_ENUMS").is_ok(),
@@ -1363,6 +1368,16 @@ fn main() {
         builder = builder.header(hwcontext_drm_header);
     }
 
+    if env::var("CARGO_FEATURE_VULKAN").is_ok() {
+        if let Some(hwcontext_vulkan_header) =
+            maybe_search_include(&include_paths, "libavutil/hwcontext_vulkan.h")
+        {
+            builder = builder.header(hwcontext_vulkan_header);
+        } else {
+            panic!("vulkan feature asked for but no vulkan header?");
+        }
+    }
+
     // Finish the builder and generate the bindings.
     let bindings = builder
         .generate()

src/lib.rs

@@ -9,6 +9,33 @@
 
 extern crate libc;
 
+#[cfg(feature = "vulkan")]
+extern crate ash;
+
+#[cfg(feature = "vulkan")]
+use ash::vk::{
+    AccessFlags as VkAccessFlagBits, Device as VkDevice, DeviceMemory as VkDeviceMemory,
+    Format as VkFormat, Image as VkImage, ImageCreateFlags as VkImageCreateFlags,
+    ImageLayout as VkImageLayout, ImageTiling as VkImageTiling,
+    ImageUsageFlags as VkImageUsageFlagBits, Instance as VkInstance,
+    MemoryPropertyFlags as VkMemoryPropertyFlagBits, PFN_vkGetInstanceProcAddr,
+    PhysicalDevice as VkPhysicalDevice, QueueFlags as VkQueueFlagBits, Semaphore as VkSemaphore,
+    VideoCodecOperationFlagsKHR as VkVideoCodecOperationFlagBitsKHR,
+};
+
+// the generated bindgen structs need these types that have lifetimes in them,
+// but there is no way within bindgen to propagate those lifetimes out into the structs
+// that contain these structs
+//
+// so, just put 'static to let it compile. Making sure the lifetimes are actually
+// check out nicely is now part of the checks an author must do when using the unsafe
+// functions that take in these structs or any other structs that contain them.
+
+#[cfg(feature = "vulkan")]
+type VkAllocationCallbacks = ash::vk::AllocationCallbacks<'static>;
+#[cfg(feature = "vulkan")]
+type VkPhysicalDeviceFeatures2 = ash::vk::PhysicalDeviceFeatures2<'static>;
+
 include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
 
 #[macro_use]