vp9/common/vp9_seg_common.h

   1 /*
   2  *  Copyright (c) 2012 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 #ifndef VP9_COMMON_VP9_SEG_COMMON_H_
  12 #define VP9_COMMON_VP9_SEG_COMMON_H_
  13
  14 #include "vpx_dsp/prob.h"
  15
  16 #ifdef __cplusplus
  17 extern "C" {
  18 #endif
  19
  20 #define SEGMENT_DELTADATA   0
  21 #define SEGMENT_ABSDATA     1
  22
  23 #define MAX_SEGMENTS     8
  24 #define SEG_TREE_PROBS   (MAX_SEGMENTS-1)
  25
  26 #define PREDICTION_PROBS 3
  27
  28 // Segment level features.
  29 typedef enum {
  30   SEG_LVL_ALT_Q = 0,               // Use alternate Quantizer ....
  31   SEG_LVL_ALT_LF = 1,              // Use alternate loop filter value...
  32   SEG_LVL_REF_FRAME = 2,           // Optional Segment reference frame
  33   SEG_LVL_SKIP = 3,                // Optional Segment (0,0) + skip mode
  34   SEG_LVL_MAX = 4                  // Number of features supported
  35 } SEG_LVL_FEATURES;
  36
  37
  38 struct segmentation {
  39   uint8_t enabled;
  40   uint8_t update_map;
  41   uint8_t update_data;
  42   uint8_t abs_delta;
  43   uint8_t temporal_update;
  44
  45   vpx_prob tree_probs[SEG_TREE_PROBS];
  46   vpx_prob pred_probs[PREDICTION_PROBS];
  47
  48   int16_t feature_data[MAX_SEGMENTS][SEG_LVL_MAX];
  49   unsigned int feature_mask[MAX_SEGMENTS];
  50 };
  51
  52 static INLINE int segfeature_active(const struct segmentation *seg,
  53                                     int segment_id,
  54                                     SEG_LVL_FEATURES feature_id) {
  55   return seg->enabled &&
  56          (seg->feature_mask[segment_id] & (1 << feature_id));
  57 }
  58
  59 void vp9_clearall_segfeatures(struct segmentation *seg);
  60
  61 void vp9_enable_segfeature(struct segmentation *seg,
  62                            int segment_id,
  63                            SEG_LVL_FEATURES feature_id);
  64
  65 int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id);
  66
  67 int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id);
  68
  69 void vp9_set_segdata(struct segmentation *seg,
  70                      int segment_id,
  71                      SEG_LVL_FEATURES feature_id,
  72                      int seg_data);
  73
  74 static INLINE int get_segdata(const struct segmentation *seg, int segment_id,
  75                               SEG_LVL_FEATURES feature_id) {
  76   return seg->feature_data[segment_id][feature_id];
  77 }
  78
  79 extern const vp9_tree_index vp9_segment_tree[TREE_SIZE(MAX_SEGMENTS)];
  80
  81 #ifdef __cplusplus
  82 }  // extern "C"
  83 #endif
  84
  85 #endif  // VP9_COMMON_VP9_SEG_COMMON_H_
  86