plugins: remove gst_vaapi_plugin_base_get_allowed_srcpad_raw_caps()

Since nobody uses it, just remove it.

Thus extract_allowed_surface_formats() is refactored to attend only
gst_vaapi_plugin_base_get_allowed_sinkpad_raw_caps().

Now a surface is created when the image chorma is different from the
previous one. And if the driver has the quirk, it outputs all the
supported image formats without trying them.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/-/merge_requests/381>

gst/vaapi/gstvaapipluginbase.c

@@ -1404,14 +1404,19 @@ no_valid_gl_display:
 
 static GArray *
 extract_allowed_surface_formats (GstVaapiDisplay * display,
-    GArray * img_formats, GstVideoFormat specified_format,
-    GstPadDirection direction)
+    GArray * img_formats)
 {
   guint i;
   GArray *out_formats;
+  guint surface_chroma = 0;
   GstVaapiSurface *surface = NULL;
 
-  g_assert (direction == GST_PAD_SRC || direction == GST_PAD_SINK);
+  /* let's assume all the formats are possible to download */
+  if (gst_vaapi_display_has_driver_quirks (display,
+          GST_VAAPI_DRIVER_QUIRK_NO_CHECK_SURFACE_PUT_IMAGE)) {
+    out_formats = g_array_ref (img_formats);
+    goto bail;
+  }
 
   out_formats =
       g_array_sized_new (FALSE, FALSE, sizeof (GstVideoFormat),
@@ -1424,54 +1429,34 @@ extract_allowed_surface_formats (GstVaapiDisplay * display,
         g_array_index (img_formats, GstVideoFormat, i);
     GstVaapiImage *image;
     GstVideoInfo vi;
-    GstVideoFormat surface_format;
-    gboolean res;
+    guint img_chroma;
 
     if (img_format == GST_VIDEO_FORMAT_UNKNOWN)
       continue;
 
-    surface_format =
-        (specified_format == GST_VIDEO_FORMAT_UNKNOWN) ?
-        img_format : specified_format;
-    if (!surface) {
-      gst_video_info_set_format (&vi, surface_format, 64, 64);
+    img_chroma = gst_vaapi_video_format_get_chroma_type (img_format);
+    if (img_chroma != surface_chroma) {
+      if (surface)
+        gst_vaapi_surface_unref (surface);
+      gst_video_info_set_format (&vi, img_format, 64, 64);
       surface = gst_vaapi_surface_new_full (display, &vi, 0);
       if (!surface)
         continue;
+      surface_chroma = img_chroma;
     }
 
     image = gst_vaapi_image_new (display, img_format, 64, 64);
-    if (!image) {
-      /* Just reuse the surface if the format is specified */
-      if (specified_format == GST_VIDEO_FORMAT_UNKNOWN)
-        gst_mini_object_replace ((GstMiniObject **) & surface, NULL);
-
+    if (!image)
       continue;
-    }
-
-    res = FALSE;
-    if (direction == GST_PAD_SRC) {
-      res = gst_vaapi_surface_get_image (surface, image);
-    } else {
-      if (!gst_vaapi_display_has_driver_quirks (display,
-              GST_VAAPI_DRIVER_QUIRK_NO_CHECK_SURFACE_PUT_IMAGE))
-        res = gst_vaapi_surface_put_image (surface, image);
-      else
-        res = TRUE;             /* Let's say it's possible to upload
-                                 * all formats */
-    }
-    if (res)
+    if (gst_vaapi_surface_put_image (surface, image))
       g_array_append_val (out_formats, img_format);
-
     gst_vaapi_image_unref (image);
-    /* Just reuse the surface if the format is specified */
-    if (specified_format == GST_VIDEO_FORMAT_UNKNOWN)
-      gst_mini_object_replace ((GstMiniObject **) & surface, NULL);
   }
 
   if (surface)
     gst_vaapi_surface_unref (surface);
 
+bail:
   if (out_formats->len == 0) {
     g_array_unref (out_formats);
     return NULL;
@@ -1480,8 +1465,7 @@ extract_allowed_surface_formats (GstVaapiDisplay * display,
 }
 
 static gboolean
-ensure_allowed_raw_caps (GstVaapiPluginBase * plugin, GstVideoFormat format,
-    GstPadDirection direction)
+ensure_allowed_raw_caps (GstVaapiPluginBase * plugin)
 {
   GArray *formats, *out_formats;
   GstVaapiDisplay *display;
@@ -1496,8 +1480,7 @@ ensure_allowed_raw_caps (GstVaapiPluginBase * plugin, GstVideoFormat format,
   formats = gst_vaapi_display_get_image_formats (display);
   if (!formats)
     goto bail;
-  out_formats =
-      extract_allowed_surface_formats (display, formats, format, direction);
+  out_formats = extract_allowed_surface_formats (display, formats);
   if (!out_formats)
     goto bail;
   out_caps = gst_vaapi_video_format_new_template_caps_from_list (out_formats);
@@ -1529,25 +1512,7 @@ bail:
 GstCaps *
 gst_vaapi_plugin_base_get_allowed_sinkpad_raw_caps (GstVaapiPluginBase * plugin)
 {
-  if (!ensure_allowed_raw_caps (plugin, GST_VIDEO_FORMAT_UNKNOWN, GST_PAD_SINK))
-    return NULL;
-  return plugin->allowed_raw_caps;
-}
-
-/**
- * gst_vaapi_plugin_base_get_allowed_srcpad_raw_caps:
- * @plugin: a #GstVaapiPluginBase
- * @format: a #GstVideoFormat, the format we need to check
- *
- * Returns the raw #GstCaps allowed by the element.
- *
- * Returns: the allowed raw #GstCaps or %NULL
- **/
-GstCaps *
-gst_vaapi_plugin_base_get_allowed_srcpad_raw_caps (GstVaapiPluginBase *
-    plugin, GstVideoFormat format)
-{
-  if (!ensure_allowed_raw_caps (plugin, format, GST_PAD_SRC))
+  if (!ensure_allowed_raw_caps (plugin))
     return NULL;
   return plugin->allowed_raw_caps;
 }

gst/vaapi/gstvaapipluginbase.h

@@ -301,11 +301,6 @@ G_GNUC_INTERNAL
 GstCaps *
 gst_vaapi_plugin_base_get_allowed_sinkpad_raw_caps (GstVaapiPluginBase * plugin);
 
-G_GNUC_INTERNAL
-GstCaps *
-gst_vaapi_plugin_base_get_allowed_srcpad_raw_caps (
-    GstVaapiPluginBase * plugin, GstVideoFormat format);
-
 G_GNUC_INTERNAL
 void
 gst_vaapi_plugin_base_set_srcpad_can_dmabuf (GstVaapiPluginBase * plugin,