[PR] avutil/hwcontext_d3d11va: Set BindFlags for AMD GPUs (PR #24046)

PR #24046 opened by softworkz
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24046
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24046.patch

- AMD drivers require the shader_resource flag for all processing and encoding. 
- When bind flags are zero, texture creation fails, so set the most compatible bind_decoder flag which works in all cases.

### Why this is needed (and hasn't before)

It's a prerequisite for upcoming PRs which will enable mapping hw frames

- from D3D11(AMD) to OpenCL(AMD)
- from OpenCL(AMD) back to D3D11(AMD)
- from AMF to D3D11
- from D3D11 to AMF




>From ec6aa7e356f93ad03d8cefcfe275b582df1477d8 Mon Sep 17 00:00:00 2001
From: softworkz <[email protected]>
Date: Wed, 29 Jul 2026 04:19:24 +0200
Subject: [PATCH] avutil/hwcontext_d3d11va: Set BindFlags for AMD GPUs

AMD drivers require the shader_resource flag for all processing and
encoding. When bind flags are zero, texture creation fails, so set
the most compatible bind_decoder flag which works in all cases.

Signed-off-by: softworkz <[email protected]>
---
 libavutil/hwcontext_d3d11va.c | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/libavutil/hwcontext_d3d11va.c b/libavutil/hwcontext_d3d11va.c
index 834c2ce3dd..faa9ce52c9 100644
--- a/libavutil/hwcontext_d3d11va.c
+++ b/libavutil/hwcontext_d3d11va.c
@@ -116,6 +116,31 @@ static const struct {
     { DXGI_FORMAT_420_OPAQUE,   AV_PIX_FMT_YUV420P },
 };
 
+static int d3d11va_is_amd(const AVD3D11VADeviceContext *device_hwctx)
+{
+    IDXGIDevice *dxgi_device = NULL;
+    IDXGIAdapter *adapter = NULL;
+    DXGI_ADAPTER_DESC desc;
+    HRESULT hr;
+    int is_amd = 0;
+
+    hr = ID3D11Device_QueryInterface(device_hwctx->device, &IID_IDXGIDevice, (void **)&dxgi_device);
+    if (FAILED(hr))
+        return 0;
+
+    hr = IDXGIDevice_GetAdapter(dxgi_device, &adapter);
+    if (SUCCEEDED(hr)) {
+        hr = IDXGIAdapter_GetDesc(adapter, &desc);
+        if (SUCCEEDED(hr))
+            is_amd = desc.VendorId == 0x1002; // AMD
+        IDXGIAdapter_Release(adapter);
+    }
+
+    IDXGIDevice_Release(dxgi_device);
+
+    return is_amd;
+}
+
 static void d3d11va_default_lock(void *ctx)
 {
     WaitForSingleObjectEx(ctx, INFINITE, FALSE);
@@ -294,6 +319,14 @@ static int d3d11va_frames_init(AVHWFramesContext *ctx)
     hwctx->BindFlags |= device_hwctx->BindFlags;
     hwctx->MiscFlags |= device_hwctx->MiscFlags;
 
+    // AMD drivers require the shader_resource flag for all processing and encoding and 
+    // texture creation fails when BindFlags is zero
+    if (d3d11va_is_amd(device_hwctx)) {
+        if (hwctx->BindFlags == 0)
+            hwctx->BindFlags = D3D11_BIND_DECODER;
+        hwctx->BindFlags  |= D3D11_BIND_SHADER_RESOURCE;
+    }
+
     ctx->initial_pool_size = FFMIN(ctx->initial_pool_size, MAX_ARRAY_SIZE);
 
     texDesc = (D3D11_TEXTURE2D_DESC){
-- 
2.52.0

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