/* Determine frame start: first field for field picture or frame picture  */
static int mpeg2_get_is_frame_start(MpegEncContext *s)
/* Determine frame start: first field for field picture or frame picture  */
static int mpeg2_get_is_frame_start(MpegEncContext *s)
{
    return s->first_field || s->picture_structure == PICT_FRAME;
}