[FFmpeg-devel] [PATCH] lavu/hwcontext_vulkan: check PCI ID if possible

["Xiang, Haihao" <haihao.xiang-at-intel.com@ffmpeg.org>]

From: Haihao Xiang <haihao.xiang@intel.com>

Otherwise the derived device and the source device might have different
PCI ID in a multiple-device system.

Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>
---
 libavutil/hwcontext_vulkan.c | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)

diff --git a/libavutil/hwcontext_vulkan.c b/libavutil/hwcontext_vulkan.c
index 855f099e26..91b9f96ccf 100644
--- a/libavutil/hwcontext_vulkan.c
+++ b/libavutil/hwcontext_vulkan.c
@@ -1597,15 +1597,31 @@ static int vulkan_device_derive(AVHWDeviceContext *ctx,
 #if CONFIG_VAAPI
     case AV_HWDEVICE_TYPE_VAAPI: {
         AVVAAPIDeviceContext *src_hwctx = src_ctx->hwctx;
+        VADisplay dpy = src_hwctx->display;
+#if VA_CHECK_VERSION(1, 15, 0)
+        VAStatus vas;
+        VADisplayAttribute attr = {
+            .type = VADisplayPCIID,
+        };
+#endif
+        const char *vendor;
 
-        const char *vendor = vaQueryVendorString(src_hwctx->display);
-        if (!vendor) {
-            av_log(ctx, AV_LOG_ERROR, "Unable to get device info from VAAPI!\n");
-            return AVERROR_EXTERNAL;
-        }
+#if VA_CHECK_VERSION(1, 15, 0)
+        vas = vaGetDisplayAttributes(dpy, &attr, 1);
+        if (vas == VA_STATUS_SUCCESS && attr.flags != VA_DISPLAY_ATTRIB_NOT_SUPPORTED)
+            dev_select.pci_device = (attr.value & 0xFFFF);
+#endif
+
+        if (!dev_select.pci_device) {
+            vendor = vaQueryVendorString(dpy);
+            if (!vendor) {
+                av_log(ctx, AV_LOG_ERROR, "Unable to get device info from VAAPI!\n");
+                return AVERROR_EXTERNAL;
+            }
 
-        if (strstr(vendor, "AMD"))
-            dev_select.vendor_id = 0x1002;
+            if (strstr(vendor, "AMD"))
+                dev_select.vendor_id = 0x1002;
+        }
 
         return vulkan_device_create_internal(ctx, &dev_select, 0, opts, flags);
     }
-- 
2.34.1

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