michael@0: /*
michael@0:  *  Copyright (c) 2013 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: #ifndef VP9_COMMON_VP9_SCAN_H_
michael@0: #define VP9_COMMON_VP9_SCAN_H_
michael@0: 
michael@0: #include "vpx/vpx_integer.h"
michael@0: #include "vpx_ports/mem.h"
michael@0: 
michael@0: #include "vp9/common/vp9_enums.h"
michael@0: 
michael@0: #define MAX_NEIGHBORS 2
michael@0: 
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_default_scan_4x4[16]);
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_col_scan_4x4[16]);
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_row_scan_4x4[16]);
michael@0: 
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_default_scan_8x8[64]);
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_col_scan_8x8[64]);
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_row_scan_8x8[64]);
michael@0: 
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_default_scan_16x16[256]);
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_col_scan_16x16[256]);
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_row_scan_16x16[256]);
michael@0: 
michael@0: extern DECLARE_ALIGNED(16, const int16_t, vp9_default_scan_32x32[1024]);
michael@0: 
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_4x4[16]);
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_col_iscan_4x4[16]);
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_row_iscan_4x4[16]);
michael@0: 
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_8x8[64]);
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_col_iscan_8x8[64]);
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_row_iscan_8x8[64]);
michael@0: 
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_16x16[256]);
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_col_iscan_16x16[256]);
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_row_iscan_16x16[256]);
michael@0: 
michael@0: extern DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_32x32[1024]);
michael@0: 
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_default_scan_4x4_neighbors[17 * MAX_NEIGHBORS]);
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_col_scan_4x4_neighbors[17 * MAX_NEIGHBORS]);
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_row_scan_4x4_neighbors[17 * MAX_NEIGHBORS]);
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_col_scan_8x8_neighbors[65 * MAX_NEIGHBORS]);
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_row_scan_8x8_neighbors[65 * MAX_NEIGHBORS]);
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_default_scan_8x8_neighbors[65 * MAX_NEIGHBORS]);
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_col_scan_16x16_neighbors[257 * MAX_NEIGHBORS]);
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_row_scan_16x16_neighbors[257 * MAX_NEIGHBORS]);
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_default_scan_16x16_neighbors[257 * MAX_NEIGHBORS]);
michael@0: extern DECLARE_ALIGNED(16, int16_t,
michael@0:                        vp9_default_scan_32x32_neighbors[1025 * MAX_NEIGHBORS]);
michael@0: 
michael@0: 
michael@0: void vp9_init_neighbors();
michael@0: 
michael@0: static INLINE const int16_t* get_scan_4x4(TX_TYPE tx_type) {
michael@0:   switch (tx_type) {
michael@0:     case ADST_DCT:
michael@0:       return vp9_row_scan_4x4;
michael@0:     case DCT_ADST:
michael@0:       return vp9_col_scan_4x4;
michael@0:     default:
michael@0:       return vp9_default_scan_4x4;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE void get_scan_nb_4x4(TX_TYPE tx_type,
michael@0:                                    const int16_t **scan, const int16_t **nb) {
michael@0:   switch (tx_type) {
michael@0:     case ADST_DCT:
michael@0:       *scan = vp9_row_scan_4x4;
michael@0:       *nb = vp9_row_scan_4x4_neighbors;
michael@0:       break;
michael@0:     case DCT_ADST:
michael@0:       *scan = vp9_col_scan_4x4;
michael@0:       *nb = vp9_col_scan_4x4_neighbors;
michael@0:       break;
michael@0:     default:
michael@0:       *scan = vp9_default_scan_4x4;
michael@0:       *nb = vp9_default_scan_4x4_neighbors;
michael@0:       break;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE const int16_t* get_iscan_4x4(TX_TYPE tx_type) {
michael@0:   switch (tx_type) {
michael@0:     case ADST_DCT:
michael@0:       return vp9_row_iscan_4x4;
michael@0:     case DCT_ADST:
michael@0:       return vp9_col_iscan_4x4;
michael@0:     default:
michael@0:       return vp9_default_iscan_4x4;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE const int16_t* get_scan_8x8(TX_TYPE tx_type) {
michael@0:   switch (tx_type) {
michael@0:     case ADST_DCT:
michael@0:       return vp9_row_scan_8x8;
michael@0:     case DCT_ADST:
michael@0:       return vp9_col_scan_8x8;
michael@0:     default:
michael@0:       return vp9_default_scan_8x8;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE void get_scan_nb_8x8(TX_TYPE tx_type,
michael@0:                                    const int16_t **scan, const int16_t **nb) {
michael@0:   switch (tx_type) {
michael@0:     case ADST_DCT:
michael@0:       *scan = vp9_row_scan_8x8;
michael@0:       *nb = vp9_row_scan_8x8_neighbors;
michael@0:       break;
michael@0:     case DCT_ADST:
michael@0:       *scan = vp9_col_scan_8x8;
michael@0:       *nb = vp9_col_scan_8x8_neighbors;
michael@0:       break;
michael@0:     default:
michael@0:       *scan = vp9_default_scan_8x8;
michael@0:       *nb = vp9_default_scan_8x8_neighbors;
michael@0:       break;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE const int16_t* get_iscan_8x8(TX_TYPE tx_type) {
michael@0:   switch (tx_type) {
michael@0:     case ADST_DCT:
michael@0:       return vp9_row_iscan_8x8;
michael@0:     case DCT_ADST:
michael@0:       return vp9_col_iscan_8x8;
michael@0:     default:
michael@0:       return vp9_default_iscan_8x8;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE const int16_t* get_scan_16x16(TX_TYPE tx_type) {
michael@0:   switch (tx_type) {
michael@0:     case ADST_DCT:
michael@0:       return vp9_row_scan_16x16;
michael@0:     case DCT_ADST:
michael@0:       return vp9_col_scan_16x16;
michael@0:     default:
michael@0:       return vp9_default_scan_16x16;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE void get_scan_nb_16x16(TX_TYPE tx_type,
michael@0:                                      const int16_t **scan, const int16_t **nb) {
michael@0:   switch (tx_type) {
michael@0:     case ADST_DCT:
michael@0:       *scan = vp9_row_scan_16x16;
michael@0:       *nb = vp9_row_scan_16x16_neighbors;
michael@0:       break;
michael@0:     case DCT_ADST:
michael@0:       *scan = vp9_col_scan_16x16;
michael@0:       *nb = vp9_col_scan_16x16_neighbors;
michael@0:       break;
michael@0:     default:
michael@0:       *scan = vp9_default_scan_16x16;
michael@0:       *nb = vp9_default_scan_16x16_neighbors;
michael@0:       break;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE const int16_t* get_iscan_16x16(TX_TYPE tx_type) {
michael@0:   switch (tx_type) {
michael@0:     case ADST_DCT:
michael@0:       return vp9_row_iscan_16x16;
michael@0:     case DCT_ADST:
michael@0:       return vp9_col_iscan_16x16;
michael@0:     default:
michael@0:       return vp9_default_iscan_16x16;
michael@0:   }
michael@0: }
michael@0: 
michael@0: static INLINE int get_coef_context(const int16_t *neighbors,
michael@0:                                    const uint8_t *token_cache, int c) {
michael@0:   return (1 + token_cache[neighbors[MAX_NEIGHBORS * c + 0]] +
michael@0:           token_cache[neighbors[MAX_NEIGHBORS * c + 1]]) >> 1;
michael@0: }
michael@0: 
michael@0: #endif  // VP9_COMMON_VP9_SCAN_H_