[FFmpeg-devel] [PATCH 5/7] libavutil/hwcontext_vulkan: Add hwupload and hwdownload support when using one_memory flag.

[Wenbin Chen]

Add hwupload and hwdownload support to vulkan when frames are allocated
in one memory

Signed-off-by: Wenbin Chen <wenbin.chen at intel.com>
---
 libavutil/hwcontext_vulkan.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/libavutil/hwcontext_vulkan.c b/libavutil/hwcontext_vulkan.c
index f7878ed9c3..b857d1a9ed 100644
--- a/libavutil/hwcontext_vulkan.c
+++ b/libavutil/hwcontext_vulkan.c
@@ -2138,7 +2138,7 @@ static int vulkan_map_frame_to_mem(AVHWFramesContext *hwfc, AVFrame *dst,
                                    const AVFrame *src, int flags)
 {
     VkResult ret;
-    int err, mapped_mem_count = 0;
+    int err, mapped_mem_count = 0, loop = 0;
     AVVkFrame *f = (AVVkFrame *)src->data[0];
     AVVulkanDeviceContext *hwctx = hwfc->device_ctx->hwctx;
     const int planes = av_pix_fmt_count_planes(hwfc->sw_format);
@@ -2167,7 +2167,8 @@ static int vulkan_map_frame_to_mem(AVHWFramesContext *hwfc, AVFrame *dst,
     dst->width  = src->width;
     dst->height = src->height;
 
-    for (int i = 0; i < planes; i++) {
+    loop = p->use_one_memory ? 1 : planes;
+    for (int i = 0; i < loop; i++) {
         ret = vk->MapMemory(hwctx->act_dev, f->mem[i], 0,
                             VK_WHOLE_SIZE, 0, (void **)&dst->data[i]);
         if (ret != VK_SUCCESS) {
@@ -2178,6 +2179,11 @@ static int vulkan_map_frame_to_mem(AVHWFramesContext *hwfc, AVFrame *dst,
         }
         mapped_mem_count++;
     }
+    if (p->use_one_memory) {
+        for (int i = 0; i < planes; i++) {
+            dst->data[i] = dst->data[0] + f->offset[i];
+        }
+    }
 
     /* Check if the memory contents matter */
     if (((flags & AV_HWFRAME_MAP_READ) || !(flags & AV_HWFRAME_MAP_OVERWRITE)) &&
-- 
2.25.1