2 * Copyright (c) 2013 The WebM project authors. All Rights Reserved.
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.
11 #ifndef VP9_COMMON_VP9_SCAN_H_
12 #define VP9_COMMON_VP9_SCAN_H_
14 #include "vpx/vpx_integer.h"
15 #include "vpx_ports/mem.h"
17 #include "vp10/common/enums.h"
18 #include "vp10/common/blockd.h"
24 #define MAX_NEIGHBORS 2
29 const int16_t *neighbors;
32 extern const scan_order vp10_default_scan_orders[TX_SIZES];
33 extern const scan_order vp10_scan_orders[TX_SIZES][TX_TYPES];
35 static INLINE int get_coef_context(const int16_t *neighbors,
36 const uint8_t *token_cache, int c) {
37 return (1 + token_cache[neighbors[MAX_NEIGHBORS * c + 0]] +
38 token_cache[neighbors[MAX_NEIGHBORS * c + 1]]) >> 1;
41 static INLINE const scan_order *get_scan(const MACROBLOCKD *xd, TX_SIZE tx_size,
42 PLANE_TYPE type, int block_idx) {
43 const MODE_INFO *const mi = xd->mi[0];
45 if (is_inter_block(&mi->mbmi) || type != PLANE_TYPE_Y || xd->lossless) {
46 return &vp10_default_scan_orders[tx_size];
48 const PREDICTION_MODE mode = get_y_mode(mi, block_idx);
49 return &vp10_scan_orders[tx_size][intra_mode_to_tx_type_lookup[mode]];
57 #endif // VP9_COMMON_VP9_SCAN_H_