+static int rv20_decode_picture_header(MpegEncContext *s)
+{
+ int seq, mb_pos, i;
+ int rpr_bits;
+
+ i= get_bits(&s->gb, 2);
+ switch(i){
+ case 0: s->pict_type= AV_PICTURE_TYPE_I; break;
+ case 1: s->pict_type= AV_PICTURE_TYPE_I; break; //hmm ...
+ case 2: s->pict_type= AV_PICTURE_TYPE_P; break;
+ case 3: s->pict_type= AV_PICTURE_TYPE_B; break;
+ default:
+ av_log(s->avctx, AV_LOG_ERROR, "unknown frame type\n");
+ return -1;
+ }
+
+ if(s->last_picture_ptr==NULL && s->pict_type==AV_PICTURE_TYPE_B){
+ av_log(s->avctx, AV_LOG_ERROR, "early B pix\n");
+ return -1;
+ }
+
+ if (get_bits1(&s->gb)){
+ av_log(s->avctx, AV_LOG_ERROR, "reserved bit set\n");
+ return -1;
+ }
+
+ s->qscale = get_bits(&s->gb, 5);
+ if(s->qscale==0){
+ av_log(s->avctx, AV_LOG_ERROR, "error, qscale:0\n");
+ return -1;
+ }
+
+ if(RV_GET_MINOR_VER(s->avctx->sub_id) >= 2)
+ s->loop_filter = get_bits1(&s->gb);
+
+ if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1)
+ seq = get_bits(&s->gb, 8) << 7;
+ else
+ seq = get_bits(&s->gb, 13) << 2;
+
+ rpr_bits = s->avctx->extradata[1] & 7;
+ if(rpr_bits){
+ int f, new_w, new_h;
+ rpr_bits = FFMIN((rpr_bits >> 1) + 1, 3);
+
+ f = get_bits(&s->gb, rpr_bits);
+
+ if(f){
+ new_w= 4*((uint8_t*)s->avctx->extradata)[6+2*f];
+ new_h= 4*((uint8_t*)s->avctx->extradata)[7+2*f];
+ }else{
+ new_w= s->orig_width ;
+ new_h= s->orig_height;
+ }
+ if(new_w != s->width || new_h != s->height){
+ av_log(s->avctx, AV_LOG_DEBUG, "attempting to change resolution to %dx%d\n", new_w, new_h);
+ if (av_image_check_size(new_w, new_h, 0, s->avctx) < 0)
+ return -1;
+ MPV_common_end(s);
+ avcodec_set_dimensions(s->avctx, new_w, new_h);
+ s->width = new_w;
+ s->height = new_h;
+ if (MPV_common_init(s) < 0)
+ return -1;
+ }
+
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO){
+ av_log(s->avctx, AV_LOG_DEBUG, "F %d/%d\n", f, rpr_bits);
+ }
+ }
+
+ mb_pos = ff_h263_decode_mba(s);
+
+//av_log(s->avctx, AV_LOG_DEBUG, "%d\n", seq);
+ seq |= s->time &~0x7FFF;
+ if(seq - s->time > 0x4000) seq -= 0x8000;
+ if(seq - s->time < -0x4000) seq += 0x8000;
+ if(seq != s->time){
+ if(s->pict_type!=AV_PICTURE_TYPE_B){
+ s->time= seq;
+ s->pp_time= s->time - s->last_non_b_time;
+ s->last_non_b_time= s->time;
+ }else{
+ s->time= seq;
+ s->pb_time= s->pp_time - (s->last_non_b_time - s->time);
+ if(s->pp_time <=s->pb_time || s->pp_time <= s->pp_time - s->pb_time || s->pp_time<=0){
+ av_log(s->avctx, AV_LOG_DEBUG, "messed up order, possible from seeking? skipping current b frame\n");
+ return FRAME_SKIPPED;
+ }
+ ff_mpeg4_init_direct_mv(s);
+ }
+ }
+// printf("%d %d %d %d %d\n", seq, (int)s->time, (int)s->last_non_b_time, s->pp_time, s->pb_time);
+/*for(i=0; i<32; i++){
+ av_log(s->avctx, AV_LOG_DEBUG, "%d", get_bits1(&s->gb));
+}
+av_log(s->avctx, AV_LOG_DEBUG, "\n");*/
+ s->no_rounding= get_bits1(&s->gb);
+
+ if(RV_GET_MINOR_VER(s->avctx->sub_id) <= 1 && s->pict_type == AV_PICTURE_TYPE_B)
+ skip_bits(&s->gb, 5); // binary decoder reads 3+2 bits here but they don't seem to be used
+
+ s->f_code = 1;
+ s->unrestricted_mv = 1;
+ s->h263_aic= s->pict_type == AV_PICTURE_TYPE_I;
+// s->alt_inter_vlc=1;
+// s->obmc=1;
+// s->umvplus=1;
+ s->modified_quant=1;
+ if(!s->avctx->lowres)
+ s->loop_filter=1;
+
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO){
+ av_log(s->avctx, AV_LOG_INFO, "num:%5d x:%2d y:%2d type:%d qscale:%2d rnd:%d\n",
+ seq, s->mb_x, s->mb_y, s->pict_type, s->qscale, s->no_rounding);
+ }
+
+ assert(s->pict_type != AV_PICTURE_TYPE_B || !s->low_delay);
+
+ return s->mb_width*s->mb_height - mb_pos;
+}
+
+static av_cold int rv10_decode_init(AVCodecContext *avctx)