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/*
* Copyright (c) 2013 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef VP10_COMMON_SCAN_H_
#define VP10_COMMON_SCAN_H_
#include "vpx/vpx_integer.h"
#include "vpx_ports/mem.h"
#include "vp10/common/enums.h"
#include "vp10/common/blockd.h"
#ifdef __cplusplus
extern "C" {
#endif
#define MAX_NEIGHBORS 2
typedef struct {
const int16_t *scan;
const int16_t *iscan;
const int16_t *neighbors;
} scan_order;
extern const scan_order vp10_default_scan_orders[TX_SIZES];
extern const scan_order vp10_scan_orders[TX_SIZES][TX_TYPES];
static INLINE int get_coef_context(const int16_t *neighbors,
const uint8_t *token_cache, int c) {
return (1 + token_cache[neighbors[MAX_NEIGHBORS * c + 0]] +
token_cache[neighbors[MAX_NEIGHBORS * c + 1]]) >> 1;
}
static INLINE const scan_order *get_scan(TX_SIZE tx_size, TX_TYPE tx_type) {
return &vp10_scan_orders[tx_size][tx_type];
}
#ifdef __cplusplus
} // extern "C"
#endif
#endif // VP10_COMMON_SCAN_H_
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