From a556be69a7d193677ddded735551ded834083bfe Mon Sep 17 00:00:00 2001
From: Artem Galin <artem.galin@intel.com>
Date: Tue, 28 Nov 2023 12:42:25 +0800
Subject: [PATCH] lavu/hwcontext_d3d11va: Add option vendor_id

User may choose the hardware via option vendor_id when multiple
hardwares are available.

Signed-off-by: Artem Galin <artem.galin@intel.com>
Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>
---
 libavutil/hwcontext_d3d11va.c | 59 ++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

diff --git a/libavutil/hwcontext_d3d11va.c b/libavutil/hwcontext_d3d11va.c
index cc8c97d2b6..2fd3561c88 100644
--- a/libavutil/hwcontext_d3d11va.c
+++ b/libavutil/hwcontext_d3d11va.c
@@ -552,6 +552,47 @@ static void d3d11va_device_uninit(AVHWDeviceContext *hwdev)
     }
 }
 
+static int d3d11va_device_find_adapter_by_vendor_id(AVHWDeviceContext *ctx, uint32_t flags, const char *vendor_id)
+{
+    HRESULT hr;
+    IDXGIAdapter *adapter = NULL;
+    IDXGIFactory2 *factory;
+    int adapter_id = 0;
+    long int id = strtol(vendor_id, NULL, 0);
+
+    hr = mCreateDXGIFactory(&IID_IDXGIFactory2, (void **)&factory);
+    if (FAILED(hr)) {
+        av_log(ctx, AV_LOG_ERROR, "CreateDXGIFactory returned error\n");
+        return -1;
+    }
+
+    while (IDXGIFactory2_EnumAdapters(factory, adapter_id++, &adapter) != DXGI_ERROR_NOT_FOUND) {
+        ID3D11Device* device = NULL;
+        DXGI_ADAPTER_DESC adapter_desc;
+
+        hr = mD3D11CreateDevice(adapter, D3D_DRIVER_TYPE_UNKNOWN, NULL, flags, NULL, 0, D3D11_SDK_VERSION, &device, NULL, NULL);
+        if (FAILED(hr)) {
+            av_log(ctx, AV_LOG_DEBUG, "D3D11CreateDevice returned error, try next adapter\n");
+            IDXGIAdapter_Release(adapter);
+            continue;
+        }
+
+        hr = IDXGIAdapter2_GetDesc(adapter, &adapter_desc);
+        ID3D11Device_Release(device);
+        IDXGIAdapter_Release(adapter);
+        if (FAILED(hr)) {
+            av_log(ctx, AV_LOG_DEBUG, "IDXGIAdapter2_GetDesc returned error, try next adapter\n");
+            continue;
+        } else if (adapter_desc.VendorId == id) {
+            IDXGIFactory2_Release(factory);
+            return adapter_id - 1;
+        }
+    }
+
+    IDXGIFactory2_Release(factory);
+    return -1;
+}
+
 static int d3d11va_device_create(AVHWDeviceContext *ctx, const char *device,
                                  AVDictionary *opts, int flags)
 {
@@ -563,6 +604,7 @@ static int d3d11va_device_create(AVHWDeviceContext *ctx, const char *device,
     UINT creationFlags = D3D11_CREATE_DEVICE_VIDEO_SUPPORT;
     int is_debug       = !!av_dict_get(opts, "debug", NULL, 0);
     int ret;
+    int adapter = -1;
 
     // (On UWP we can't check this.)
 #if !HAVE_UWP
@@ -581,10 +623,25 @@ static int d3d11va_device_create(AVHWDeviceContext *ctx, const char *device,
     }
 
     if (device) {
+        adapter = atoi(device);
+    } else {
+        AVDictionaryEntry *e = av_dict_get(opts, "vendor_id", NULL, 0);
+        if (e && e->value) {
+            adapter = d3d11va_device_find_adapter_by_vendor_id(ctx, creationFlags, e->value);
+            if (adapter < 0) {
+                av_log(ctx, AV_LOG_ERROR, "Failed to find d3d11va adapter by "
+                       "vendor id %s\n", e->value);
+                return AVERROR_UNKNOWN;
+            }
+        }
+    }
+
+    if (adapter >= 0) {
         IDXGIFactory2 *pDXGIFactory;
+
+        av_log(ctx, AV_LOG_VERBOSE, "Selecting d3d11va adapter %d\n", adapter);
         hr = mCreateDXGIFactory(&IID_IDXGIFactory2, (void **)&pDXGIFactory);
         if (SUCCEEDED(hr)) {
-            int adapter = atoi(device);
             if (FAILED(IDXGIFactory2_EnumAdapters(pDXGIFactory, adapter, &pAdapter)))
                 pAdapter = NULL;
             IDXGIFactory2_Release(pDXGIFactory);