mfvideoenc: Disable RGB format support

Some GPUs support BGRA format and it will be converted to subsampled
YUV format by GPU internally. Disable this implicit conversion
since the conversion parameters such as input/output colorimetry
are not exposed nor it's written in bitstream (e.g., VUI).
We prefer explicit conversion via our conversion elements.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2410>

diff --git a/sys/mediafoundation/gstmfvideoenc.cpp b/sys/mediafoundation/gstmfvideoenc.cpp
index c3a7e79..f03edfb 100644 (file)
--- a/sys/mediafoundation/gstmfvideoenc.cpp
+++ b/sys/mediafoundation/gstmfvideoenc.cpp
@@ -1528,12 +1528,20 @@ gst_mf_video_enc_enum_internal (GstMFTransform * transform, GUID & subtype,
 
   for (i = 0; i < info_size / sizeof (MFT_REGISTER_TYPE_INFO); i++) {
     GstVideoFormat format;
+    const GstVideoFormatInfo *format_info;
     GValue val = G_VALUE_INIT;
 
     format = gst_mf_video_subtype_to_video_format (&infos[i].guidSubtype);
     if (format == GST_VIDEO_FORMAT_UNKNOWN)
       continue;
 
+    format_info = gst_video_format_get_info (format);
+    if (GST_VIDEO_FORMAT_INFO_IS_RGB (format_info)) {
+      GST_DEBUG_OBJECT (transform, "Skip %s format",
+          GST_VIDEO_FORMAT_INFO_NAME (format_info));
+      continue;
+    }
+
     if (!supported_formats) {
       supported_formats = g_new0 (GValue, 1);
       g_value_init (supported_formats, GST_TYPE_LIST);