msdk: Let deviceID config the mfx implementation

In multi-card scenario, user can set GST_MSDK_DRM_DEVICE env variable to
choose the device. This patch can align vpl's queried results with the
users' choice by passing deviceID when creating mfx implementation.

Co-authored-by: Víctor Manuel Jáquez Leal <vjaquez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5697>

subprojects/gst-plugins-bad/sys/msdk/gstmsdkcontext.c

@@ -168,9 +168,7 @@ static gboolean
 gst_msdk_context_use_vaapi (GstMsdkContext * context)
 {
   char *path;
-  VADisplay va_dpy = NULL;
   GstVaDisplay *display_drm = NULL;
-  mfxStatus status;
   GstMsdkContextPrivate *priv = context->priv;
 
   path = get_device_path ();
@@ -186,16 +184,6 @@ gst_msdk_context_use_vaapi (GstMsdkContext * context)
   }
   g_free (path);
 
-  va_dpy = gst_va_display_get_va_dpy (display_drm);
-
-  status = MFXVideoCORE_SetHandle (priv->session.session, MFX_HANDLE_VA_DISPLAY,
-      (mfxHDL) va_dpy);
-  if (status != MFX_ERR_NONE) {
-    GST_ERROR ("Setting VAAPI handle failed (%s)",
-        msdk_status_to_string (status));
-    goto failed;
-  }
-
   priv->display = display_drm;
 
   return TRUE;
@@ -310,6 +298,10 @@ gst_msdk_context_open (GstMsdkContext * context, gboolean hardware)
   GstMsdkContextPrivate *priv = context->priv;
   MsdkSession msdk_session;
   mfxIMPL impl;
+  mfxHDL handle = NULL;
+#ifndef _WIN32
+  mfxStatus status;
+#endif
 
   priv->hardware = hardware;
 
@@ -319,23 +311,36 @@ gst_msdk_context_open (GstMsdkContext * context, gboolean hardware)
   impl |= MFX_IMPL_VIA_D3D11;
 #endif
 
-  msdk_session = msdk_open_session (impl);
-  priv->session = msdk_session;
-  if (!priv->session.session)
-    goto failed;
-
 #ifndef _WIN32
   if (hardware) {
     if (!gst_msdk_context_use_vaapi (context))
-      goto failed;
-  }
-#else
-  if (hardware) {
-    if (!gst_msdk_context_use_d3d11 (context))
-      goto failed;
+      return FALSE;
+
+    handle = (mfxHDL) gst_va_display_get_va_dpy (priv->display);
   }
 #endif
 
+  msdk_session = msdk_open_session (handle, impl);
+  if (!msdk_session.session)
+    return FALSE;
+
+  priv->session = msdk_session;
+
+  if (hardware) {
+#ifndef _WIN32
+    status = MFXVideoCORE_SetHandle (priv->session.session,
+        MFX_HANDLE_VA_DISPLAY, handle);
+    if (status != MFX_ERR_NONE) {
+      GST_ERROR ("Setting VAAPI handle failed (%s)",
+          msdk_status_to_string (status));
+      return FALSE;
+    }
+#else
+    if (!gst_msdk_context_use_d3d11 (context))
+      return FALSE;
+#endif
+  }
+
   codename = msdk_get_platform_codename (priv->session.session);
 
   if (codename != MFX_PLATFORM_UNKNOWN)
@@ -344,9 +349,6 @@ gst_msdk_context_open (GstMsdkContext * context, gboolean hardware)
     GST_WARNING ("Unknown MFX platform");
 
   return TRUE;
-
-failed:
-  return FALSE;
 }
 
 static void
@@ -443,7 +445,7 @@ gst_msdk_context_new_with_parent (GstMsdkContext * parent)
   mfxIMPL impl;
   MsdkSession child_msdk_session;
   mfxHandleType handle_type = 0;
-  mfxHDL handle = NULL;
+  mfxHDL handle = NULL, hardware_handle = NULL;
 
   status = MFXQueryIMPL (parent_priv->session.session, &impl);
 
@@ -477,7 +479,12 @@ gst_msdk_context_new_with_parent (GstMsdkContext * parent)
 
   child_msdk_session.loader = parent_priv->session.loader;
   child_msdk_session.session = NULL;
-  status = msdk_init_msdk_session (impl, &version, &child_msdk_session);
+#ifndef _WIN32
+  hardware_handle = (mfxHDL) gst_va_display_get_va_dpy (parent_priv->display);
+#endif
+
+  status = msdk_init_msdk_session (hardware_handle, impl, &version,
+      &child_msdk_session);
 
   if (status != MFX_ERR_NONE) {
     GST_ERROR ("Failed to create a child mfx session (%s)",
@@ -540,6 +547,7 @@ gst_msdk_context_new_with_va_display (GstObject * display_obj,
   mfxU16 codename;
   mfxStatus status;
   GstVaDisplay *va_display;
+  mfxHDL handle;
 
   va_display = GST_VA_DISPLAY (display_obj);
   if (!va_display)
@@ -552,8 +560,10 @@ gst_msdk_context_new_with_va_display (GstObject * display_obj,
 
   priv->job_type = job_type;
   priv->hardware = hardware;
-  priv->session =
-      msdk_open_session (hardware ? MFX_IMPL_HARDWARE_ANY : MFX_IMPL_SOFTWARE);
+
+  handle = (mfxHDL) gst_va_display_get_va_dpy (priv->display);
+  priv->session = msdk_open_session (handle,
+      hardware ? MFX_IMPL_HARDWARE_ANY : MFX_IMPL_SOFTWARE);
   if (!priv->session.session) {
     gst_object_unref (obj);
     return NULL;
@@ -562,7 +572,7 @@ gst_msdk_context_new_with_va_display (GstObject * display_obj,
   if (hardware) {
     status =
         MFXVideoCORE_SetHandle (priv->session.session, MFX_HANDLE_VA_DISPLAY,
-        (mfxHDL) gst_va_display_get_va_dpy (priv->display));
+        handle);
     if (status != MFX_ERR_NONE) {
       GST_ERROR ("Setting VAAPI handle failed (%s)",
           msdk_status_to_string (status));
@@ -600,8 +610,8 @@ gst_msdk_context_new_with_d3d11_device (GstD3D11Device * device,
 
   priv->job_type = job_type;
   priv->hardware = hardware;
-  priv->session =
-      msdk_open_session (hardware ? MFX_IMPL_HARDWARE_ANY : MFX_IMPL_SOFTWARE);
+  priv->session = msdk_open_session (NULL,
+      hardware ? MFX_IMPL_HARDWARE_ANY : MFX_IMPL_SOFTWARE);
   if (!priv->session.session) {
     goto failed;
   }

subprojects/gst-plugins-bad/sys/msdk/msdk.c

@@ -213,8 +213,43 @@ msdk_release_impl_description (const mfxLoader * loader, gpointer impl_desc)
   return TRUE;
 }
 
+static mfxStatus
+_set_pci_id (mfxHDL handle, mfxConfig cfg)
+{
+#ifndef _WIN32
+  VAStatus va_status;
+  mfxStatus mfx_status;
+  VADisplay dpy = handle;
+  mfxVariant impl_value = {
+    .Type = MFX_VARIANT_TYPE_U16,
+  };
+  VADisplayAttribute attr = {
+    .type = VADisplayPCIID,
+  };
+
+  va_status = vaGetDisplayAttributes (dpy, &attr, 1);
+  if (va_status != VA_STATUS_SUCCESS ||
+      attr.flags == VA_DISPLAY_ATTRIB_NOT_SUPPORTED)
+    return MFX_ERR_UNSUPPORTED;
+
+  impl_value.Data.U16 = (attr.value & 0xFFFF);
+  mfx_status = MFXSetConfigFilterProperty (cfg,
+      (const mfxU8 *) "mfxImplDescription.mfxDeviceDescription.DeviceID",
+      impl_value);
+
+  if (mfx_status != MFX_ERR_NONE) {
+    GST_ERROR ("Failed to add an additional MFX configuration (%s)",
+        msdk_status_to_string (mfx_status));
+  }
+
+  return mfx_status;
+#else
+  return MFX_ERR_NONE;
+#endif
+}
+
 mfxStatus
-msdk_init_msdk_session (mfxIMPL impl, mfxVersion * pver,
+msdk_init_msdk_session (mfxHDL handle, mfxIMPL impl, mfxVersion * pver,
     MsdkSession * msdk_session)
 {
   mfxStatus sts = MFX_ERR_NONE;
@@ -272,6 +307,13 @@ msdk_init_msdk_session (mfxIMPL impl, mfxVersion * pver,
       MFXUnload (loader);
       return sts;
     }
+
+    sts = _set_pci_id (handle, cfg);
+
+    if (sts != MFX_ERR_NONE) {
+      MFXUnload (loader);
+      return sts;
+    }
   }
 
   while (1) {
@@ -330,8 +372,9 @@ msdk_release_impl_description (const mfxLoader * loader, gpointer impl_desc)
   return TRUE;
 }
 
+/* handle is not used here */
 mfxStatus
-msdk_init_msdk_session (mfxIMPL impl, mfxVersion * pver,
+msdk_init_msdk_session (mfxHDL handle, mfxIMPL impl, mfxVersion * pver,
     MsdkSession * msdk_session)
 {
   mfxStatus status;
@@ -388,7 +431,7 @@ msdk_close_session (MsdkSession * msdk_session)
 }
 
 MsdkSession
-msdk_open_session (mfxIMPL impl)
+msdk_open_session (mfxHDL handle, mfxIMPL impl)
 {
   mfxSession session = NULL;
   mfxVersion version = { {1, 1}
@@ -405,7 +448,7 @@ msdk_open_session (mfxIMPL impl)
   msdk_session.session = NULL;
   msdk_session.loader = NULL;
   msdk_session.impl_idx = 0;
-  status = msdk_init_msdk_session (impl, &version, &msdk_session);
+  status = msdk_init_msdk_session (handle, impl, &version, &msdk_session);
 
   if (status != MFX_ERR_NONE)
     return msdk_session;

subprojects/gst-plugins-bad/sys/msdk/msdk.h

@@ -116,7 +116,7 @@ struct _MsdkSession
   mfxLoader loader;
 };
 
-MsdkSession msdk_open_session (mfxIMPL impl);
+MsdkSession msdk_open_session (mfxHDL handle, mfxIMPL impl);
 void msdk_close_mfx_session (mfxSession session);
 void msdk_close_session (MsdkSession * session);
 
@@ -160,7 +160,7 @@ mfxU16
 msdk_get_platform_codename (mfxSession session);
 
 mfxStatus
-msdk_init_msdk_session (mfxIMPL impl, mfxVersion * pver,
+msdk_init_msdk_session (mfxHDL handle, mfxIMPL impl, mfxVersion * pver,
     MsdkSession * msdk_session);
 
 gpointer