52     AVFrame *last_frame;  member
241     if ((s->flags & GF_OFFSETTING) && s->last_frame && !palette) {  in gif_crop_opaque()
242         const uint8_t *ref = s->last_frame->data[0];  in gif_crop_opaque()
243         const int ref_linesize = s->last_frame->linesize[0];  in gif_crop_opaque()
301     int bcid = -1, honor_transparency = (s->flags & GF_TRANSDIFF) && s->last_frame && !palette;  in gif_image_write_image()
417         const int ref_linesize = s->last_frame->linesize[0];  in gif_image_write_image()
418         const uint8_t *ref = s->last_frame->data[0] + y_start*ref_linesize + x_start;  in gif_image_write_image()
502     if (!s->last_frame && !s->image) {  in gif_encode_frame()
503         s->last_frame = av_frame_alloc();  in gif_encode_frame()
504         if (!s->last_frame)  in gif_encode_frame()
509         av_frame_unref(s->last_frame);  in gif_encode_frame()
510         ret = av_frame_ref(s->last_frame, (AVFrame*)pict);  in gif_encode_frame()
531     av_frame_free(&s->last_frame);  in gif_encode_close()