Home | History | Annotate | Download | only in common 
      1 /*
      2  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
      3  *
      4  *  Use of this source code is governed by a BSD-style license
      5  *  that can be found in the LICENSE file in the root of the source
      6  *  tree. An additional intellectual property rights grant can be found
      7  *  in the file PATENTS.  All contributing project authors may
      8  *  be found in the AUTHORS file in the root of the source tree.
      9  */
     10 
     11 #include <assert.h>
     12 
     13 #include "vp9/common/vp9_blockd.h"
     14 #include "vp9/common/vp9_loopfilter.h"
     15 #include "vp9/common/vp9_seg_common.h"
     16 #include "vp9/common/vp9_quant_common.h"
     17 
     18 static const int seg_feature_data_signed[SEG_LVL_MAX] = { 1, 1, 0, 0 };
     19 
     20 static const int seg_feature_data_max[SEG_LVL_MAX] = { MAXQ, MAX_LOOP_FILTER, 3,
     21                                                        0 };
     22 
     23 // These functions provide access to new segment level features.
     24 // Eventually these function may be "optimized out" but for the moment,
     25 // the coding mechanism is still subject to change so these provide a
     26 // convenient single point of change.
     27 
     28 void vp9_clearall_segfeatures(struct segmentation *seg) {
     29   vp9_zero(seg->feature_data);
     30   vp9_zero(seg->feature_mask);
     31   seg->aq_av_offset = 0;
     32 }
     33 
     34 void vp9_enable_segfeature(struct segmentation *seg, int segment_id,
     35                            SEG_LVL_FEATURES feature_id) {
     36   seg->feature_mask[segment_id] |= 1 << feature_id;
     37 }
     38 
     39 int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
     40   return seg_feature_data_max[feature_id];
     41 }
     42 
     43 int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
     44   return seg_feature_data_signed[feature_id];
     45 }
     46 
     47 void vp9_set_segdata(struct segmentation *seg, int segment_id,
     48                      SEG_LVL_FEATURES feature_id, int seg_data) {
     49   assert(seg_data <= seg_feature_data_max[feature_id]);
     50   if (seg_data < 0) {
     51     assert(seg_feature_data_signed[feature_id]);
     52     assert(-seg_data <= seg_feature_data_max[feature_id]);
     53   }
     54 
     55   seg->feature_data[segment_id][feature_id] = seg_data;
     56 }
     57 
     58 const vpx_tree_index vp9_segment_tree[TREE_SIZE(MAX_SEGMENTS)] = {
     59   2, 4, 6, 8, 10, 12, 0, -1, -2, -3, -4, -5, -6, -7
     60 };
     61 
     62 // TBD? Functions to read and write segment data with range / validity checking
     63