michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: #include <assert.h>
michael@0: 
michael@0: #include "vp9/common/vp9_blockd.h"
michael@0: #include "vp9/common/vp9_loopfilter.h"
michael@0: #include "vp9/common/vp9_seg_common.h"
michael@0: #include "vp9/common/vp9_quant_common.h"
michael@0: 
michael@0: static const int seg_feature_data_signed[SEG_LVL_MAX] = { 1, 1, 0, 0 };
michael@0: 
michael@0: static const int seg_feature_data_max[SEG_LVL_MAX] = {
michael@0:   MAXQ, MAX_LOOP_FILTER, 3, 0 };
michael@0: 
michael@0: // These functions provide access to new segment level features.
michael@0: // Eventually these function may be "optimized out" but for the moment,
michael@0: // the coding mechanism is still subject to change so these provide a
michael@0: // convenient single point of change.
michael@0: 
michael@0: int vp9_segfeature_active(const struct segmentation *seg, int segment_id,
michael@0:                           SEG_LVL_FEATURES feature_id) {
michael@0:   return seg->enabled &&
michael@0:          (seg->feature_mask[segment_id] & (1 << feature_id));
michael@0: }
michael@0: 
michael@0: void vp9_clearall_segfeatures(struct segmentation *seg) {
michael@0:   vp9_zero(seg->feature_data);
michael@0:   vp9_zero(seg->feature_mask);
michael@0: }
michael@0: 
michael@0: void vp9_enable_segfeature(struct segmentation *seg, int segment_id,
michael@0:                            SEG_LVL_FEATURES feature_id) {
michael@0:   seg->feature_mask[segment_id] |= 1 << feature_id;
michael@0: }
michael@0: 
michael@0: void vp9_disable_segfeature(struct segmentation *seg, int segment_id,
michael@0:                             SEG_LVL_FEATURES feature_id) {
michael@0:   seg->feature_mask[segment_id] &= ~(1 << feature_id);
michael@0: }
michael@0: 
michael@0: int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
michael@0:   return seg_feature_data_max[feature_id];
michael@0: }
michael@0: 
michael@0: int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
michael@0:   return seg_feature_data_signed[feature_id];
michael@0: }
michael@0: 
michael@0: void vp9_clear_segdata(struct segmentation *seg, int segment_id,
michael@0:                        SEG_LVL_FEATURES feature_id) {
michael@0:   seg->feature_data[segment_id][feature_id] = 0;
michael@0: }
michael@0: 
michael@0: void vp9_set_segdata(struct segmentation *seg, int segment_id,
michael@0:                      SEG_LVL_FEATURES feature_id, int seg_data) {
michael@0:   assert(seg_data <= seg_feature_data_max[feature_id]);
michael@0:   if (seg_data < 0) {
michael@0:     assert(seg_feature_data_signed[feature_id]);
michael@0:     assert(-seg_data <= seg_feature_data_max[feature_id]);
michael@0:   }
michael@0: 
michael@0:   seg->feature_data[segment_id][feature_id] = seg_data;
michael@0: }
michael@0: 
michael@0: int vp9_get_segdata(const struct segmentation *seg, int segment_id,
michael@0:                     SEG_LVL_FEATURES feature_id) {
michael@0:   return seg->feature_data[segment_id][feature_id];
michael@0: }
michael@0: 
michael@0: 
michael@0: const vp9_tree_index vp9_segment_tree[TREE_SIZE(MAX_SEGMENTS)] = {
michael@0:   2,  4,  6,  8, 10, 12,
michael@0:   0, -1, -2, -3, -4, -5, -6, -7
michael@0: };
michael@0: 
michael@0: 
michael@0: // TBD? Functions to read and write segment data with range / validity checking