codecs: h264: Save the field_pic_flag

This flag is set when the stream is interlaced and the specific
slice is made of single parity fields rather the paired at the
macroblock layer. This is rarely needed in late decoding process
but the Rockchip RKVDEC HW interface requires it, hence needs to
be passed through V4L2 Stateless interface.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2009>

diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264decoder.c b/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264decoder.c
index b9abcf8..eae8687 100644 (file)
--- a/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264decoder.c
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264decoder.c
@@ -823,6 +823,7 @@ gst_h264_decoder_split_frame (GstH264Decoder * self, GstH264Picture * picture)
   other_field->ref = picture->ref;
   other_field->nonexisting = picture->nonexisting;
   other_field->system_frame_number = picture->system_frame_number;
+  other_field->field_pic_flag = picture->field_pic_flag;
 
   return other_field;
 }
@@ -1515,6 +1516,8 @@ gst_h264_decoder_fill_picture_from_slice (GstH264Decoder * self,
 
   picture->idr = slice->nalu.idr_pic_flag;
   picture->dec_ref_pic_marking = slice_hdr->dec_ref_pic_marking;
+  picture->field_pic_flag = slice_hdr->field_pic_flag;
+
   if (picture->idr)
     picture->idr_pic_id = slice_hdr->idr_pic_id;
 

diff --git a/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264picture.h b/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264picture.h
index 3546800..3893381 100644 (file)
--- a/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264picture.h
+++ b/subprojects/gst-plugins-bad/gst-libs/gst/codecs/gsth264picture.h
@@ -142,6 +142,7 @@ struct _GstH264Picture
   gint nal_ref_idc;
   gboolean idr;
   gint idr_pic_id;
+  gboolean field_pic_flag;
   GstH264PictureReference ref;
   /* Whether a reference picture. */
   gboolean ref_pic;