avutil/hwcontext_vulkan: Allocate pub and priv frames hwctx together

This is possible because the lifetime of both coincide.
Besides reducing the number of allocations this also simplifies
access to VulkanFramesPriv as one no longer has to
go through AVHWFramesInternal.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavutil/hwcontext_vulkan.c

@@ -129,6 +129,11 @@ typedef struct VulkanDevicePriv {
 } VulkanDevicePriv;
 
 typedef struct VulkanFramesPriv {
+    /**
+     * The public AVVulkanFramesContext. See hwcontext_vulkan.h for it.
+     */
+    AVVulkanFramesContext p;
+
     /* Image conversions */
     FFVkExecPool compute_exec;
 
@@ -2198,9 +2203,9 @@ static AVBufferRef *vulkan_pool_alloc(void *opaque, size_t size)
     AVVkFrame *f;
     AVBufferRef *avbuf = NULL;
     AVHWFramesContext *hwfc = opaque;
-    AVVulkanFramesContext *hwctx = hwfc->hwctx;
     VulkanDevicePriv *p = hwfc->device_ctx->hwctx;
-    VulkanFramesPriv *fp = hwfc->internal->priv;
+    VulkanFramesPriv *fp = hwfc->hwctx;
+    AVVulkanFramesContext *hwctx = &fp->p;
     VkExternalMemoryHandleTypeFlags e = 0x0;
     VkExportMemoryAllocateInfo eminfo[AV_NUM_DATA_POINTERS];
 
@@ -2271,7 +2276,7 @@ static void unlock_frame(AVHWFramesContext *fc, AVVkFrame *vkf)
 static void vulkan_frames_uninit(AVHWFramesContext *hwfc)
 {
     VulkanDevicePriv *p = hwfc->device_ctx->hwctx;
-    VulkanFramesPriv *fp = hwfc->internal->priv;
+    VulkanFramesPriv *fp = hwfc->hwctx;
 
     if (fp->modifier_info) {
         if (fp->modifier_info->pDrmFormatModifiers)
@@ -2288,8 +2293,8 @@ static int vulkan_frames_init(AVHWFramesContext *hwfc)
 {
     int err;
     AVVkFrame *f;
-    AVVulkanFramesContext *hwctx = hwfc->hwctx;
-    VulkanFramesPriv *fp = hwfc->internal->priv;
+    VulkanFramesPriv *fp = hwfc->hwctx;
+    AVVulkanFramesContext *hwctx = &fp->p;
     VulkanDevicePriv *p = hwfc->device_ctx->hwctx;
     VkImageUsageFlagBits supported_usage;
     const struct FFVkFormatEntry *fmt;
@@ -2500,7 +2505,7 @@ static int vulkan_map_from_drm_frame_desc(AVHWFramesContext *hwfc, AVVkFrame **f
     VulkanDevicePriv *p = ctx->hwctx;
     AVVulkanDeviceContext *hwctx = &p->p;
     FFVulkanFunctions *vk = &p->vkctx.vkfn;
-    VulkanFramesPriv *fp = hwfc->internal->priv;
+    VulkanFramesPriv *fp = hwfc->hwctx;
     const AVDRMFrameDescriptor *desc = (AVDRMFrameDescriptor *)src->data[0];
     VkBindImageMemoryInfo bind_info[AV_DRM_MAX_PLANES];
     VkBindImagePlaneMemoryInfo plane_info[AV_DRM_MAX_PLANES];
@@ -3005,7 +3010,7 @@ static int vulkan_transfer_data_from_cuda(AVHWFramesContext *hwfc,
     CUcontext dummy;
     AVVkFrame *dst_f;
     AVVkFrameInternal *dst_int;
-    VulkanFramesPriv *fp = hwfc->internal->priv;
+    VulkanFramesPriv *fp = hwfc->hwctx;
     const int planes = av_pix_fmt_count_planes(hwfc->sw_format);
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(hwfc->sw_format);
 
@@ -3147,8 +3152,8 @@ static int vulkan_map_to_drm(AVHWFramesContext *hwfc, AVFrame *dst,
     VulkanDevicePriv *p = hwfc->device_ctx->hwctx;
     AVVulkanDeviceContext *hwctx = &p->p;
     FFVulkanFunctions *vk = &p->vkctx.vkfn;
-    VulkanFramesPriv *fp = hwfc->internal->priv;
-    AVVulkanFramesContext *hwfctx = hwfc->hwctx;
+    VulkanFramesPriv *fp = hwfc->hwctx;
+    AVVulkanFramesContext *hwfctx = &fp->p;
     const int planes = av_pix_fmt_count_planes(hwfc->sw_format);
     VkImageDrmFormatModifierPropertiesEXT drm_mod = {
         .sType = VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_PROPERTIES_EXT,
@@ -3318,7 +3323,7 @@ static int transfer_image_buf(AVHWFramesContext *hwfc, AVFrame *f,
 {
     int err;
     AVVkFrame *frame = (AVVkFrame *)f->data[0];
-    VulkanFramesPriv *fp = hwfc->internal->priv;
+    VulkanFramesPriv *fp = hwfc->hwctx;
     VulkanDevicePriv *p = hwfc->device_ctx->hwctx;
     FFVulkanFunctions *vk = &p->vkctx.vkfn;
     VkImageMemoryBarrier2 img_bar[AV_NUM_DATA_POINTERS];
@@ -3579,7 +3584,7 @@ static int vulkan_transfer_data_to_cuda(AVHWFramesContext *hwfc, AVFrame *dst,
     CUcontext dummy;
     AVVkFrame *dst_f;
     AVVkFrameInternal *dst_int;
-    VulkanFramesPriv *fp = hwfc->internal->priv;
+    VulkanFramesPriv *fp = hwfc->hwctx;
     const int planes = av_pix_fmt_count_planes(hwfc->sw_format);
     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(hwfc->sw_format);
 
@@ -3722,8 +3727,7 @@ const HWContextType ff_hwcontext_type_vulkan = {
     .name                   = "Vulkan",
 
     .device_hwctx_size      = sizeof(VulkanDevicePriv),
-    .frames_hwctx_size      = sizeof(AVVulkanFramesContext),
-    .frames_priv_size       = sizeof(VulkanFramesPriv),
+    .frames_hwctx_size      = sizeof(VulkanFramesPriv),
 
     .device_init            = &vulkan_device_init,
     .device_uninit          = &vulkan_device_uninit,