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From: Lynne <dev@lynne.ee>
To: ffmpeg-devel@ffmpeg.org
Date: Thu, 13 Mar 2025 18:03:35 +0100
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Subject: [FFmpeg-devel] [PATCH v4 03/16] vulkan: add ff_vk_create_imageview
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---
libavutil/vulkan.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++
libavutil/vulkan.h | 7 +++++++
2 files changed, 58 insertions(+)
diff --git a/libavutil/vulkan.c b/libavutil/vulkan.c
index 3020f01bee..99c6af7e48 100644
--- a/libavutil/vulkan.c
+++ b/libavutil/vulkan.c
@@ -1560,6 +1560,57 @@ static VkFormat map_fmt_to_rep(VkFormat fmt, enum FFVkShaderRepFormat rep_fmt)
return VK_FORMAT_UNDEFINED;
}
+int ff_vk_create_imageview(FFVulkanContext *s,
+ VkImageView *img_view, VkImageAspectFlags *aspect,
+ AVFrame *f, int plane, enum FFVkShaderRepFormat rep_fmt)
+{
+ VkResult ret;
+ FFVulkanFunctions *vk = &s->vkfn;
+ AVHWFramesContext *hwfc = (AVHWFramesContext *)f->hw_frames_ctx->data;
+ AVVulkanFramesContext *vkfc = hwfc->hwctx;
+ const VkFormat *rep_fmts = av_vkfmt_from_pixfmt(hwfc->sw_format);
+ AVVkFrame *vkf = (AVVkFrame *)f->data[0];
+ const int nb_images = ff_vk_count_images(vkf);
+
+ VkImageViewUsageCreateInfo view_usage_info = {
+ .sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_USAGE_CREATE_INFO,
+ .usage = vkfc->usage &
+ (~(VK_IMAGE_USAGE_VIDEO_ENCODE_SRC_BIT_KHR |
+ VK_IMAGE_USAGE_VIDEO_DECODE_DST_BIT_KHR)),
+ };
+ VkImageViewCreateInfo view_create_info = {
+ .sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO,
+ .pNext = &view_usage_info,
+ .image = vkf->img[FFMIN(plane, nb_images - 1)],
+ .viewType = VK_IMAGE_VIEW_TYPE_2D,
+ .format = map_fmt_to_rep(rep_fmts[plane], rep_fmt),
+ .components = ff_comp_identity_map,
+ .subresourceRange = {
+ .aspectMask = ff_vk_aspect_flag(f, plane),
+ .levelCount = 1,
+ .layerCount = 1,
+ },
+ };
+ if (view_create_info.format == VK_FORMAT_UNDEFINED) {
+ av_log(s, AV_LOG_ERROR, "Unable to find a compatible representation "
+ "of format %i and mode %i\n",
+ rep_fmts[plane], rep_fmt);
+ return AVERROR(EINVAL);
+ }
+
+ ret = vk->CreateImageView(s->hwctx->act_dev, &view_create_info,
+ s->hwctx->alloc, img_view);
+ if (ret != VK_SUCCESS) {
+ av_log(s, AV_LOG_ERROR, "Failed to create imageview: %s\n",
+ ff_vk_ret2str(ret));
+ return AVERROR_EXTERNAL;
+ }
+
+ *aspect = view_create_info.subresourceRange.aspectMask;
+
+ return 0;
+}
+
int ff_vk_create_imageviews(FFVulkanContext *s, FFVkExecContext *e,
VkImageView views[AV_NUM_DATA_POINTERS],
AVFrame *f, enum FFVkShaderRepFormat rep_fmt)
diff --git a/libavutil/vulkan.h b/libavutil/vulkan.h
index b0db5b2396..baf9dc2009 100644
--- a/libavutil/vulkan.h
+++ b/libavutil/vulkan.h
@@ -457,6 +457,13 @@ int ff_vk_exec_mirror_sem_value(FFVulkanContext *s, FFVkExecContext *e,
AVFrame *f);
void ff_vk_exec_discard_deps(FFVulkanContext *s, FFVkExecContext *e);
+/**
+ * Create a single imageview for a given plane.
+ */
+int ff_vk_create_imageview(FFVulkanContext *s,
+ VkImageView *img_view, VkImageAspectFlags *aspect,
+ AVFrame *f, int plane, enum FFVkShaderRepFormat rep_fmt);
+
/**
* Create an imageview and add it as a dependency to an execution.
*/
--
2.47.2
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