radeon/vcn: track width and height of the last frame

Adding last width/height to keep tracking the size of the last frame.

Signed-off-by: Boyuan Zhang <boyuan.zhang@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Acked-by: Veerabadhran Gopalakrishnan <veerabadhran.gopalakrishnan@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12368>

src/gallium/drivers/radeon/radeon_vcn_dec.c

@@ -565,6 +565,9 @@ static rvcn_dec_message_vp9_t get_vp9_msg(struct radeon_decoder *dec,
       memcpy(dec->ref_codec.ref_list, result.ref_frame_map, sizeof(result.ref_frame_map));
    }
 
+   dec->last_width = dec->base.width;
+   dec->last_height = dec->base.height;
+
    return result;
 }
 

src/gallium/drivers/radeon/radeon_vcn_dec.h

@@ -1082,6 +1082,8 @@ struct radeon_decoder {
    unsigned frame_number;
    unsigned db_alignment;
    unsigned dpb_size;
+   unsigned last_width;
+   unsigned last_height;
 
    struct pipe_screen *screen;
    struct radeon_winsys *ws;