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aomedia / avm / 7a40600c8a45aa787c29914db2cee8c91521a555 / . / aom_dsp / txfm_common.h
blob: a5e964aadb10b70978618f2746d28cd1f743c413 [file] [log] [blame]
Yaowu Xuc27fc142016-08-22 16:08:15 -0700[diff] [blame]1/*
Yaowu Xu9c01aa12016-09-01 14:32:49 -0700[diff] [blame]2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
Yaowu Xuc27fc142016-08-22 16:08:15 -0700[diff] [blame]3 *
Yaowu Xu9c01aa12016-09-01 14:32:49 -0700[diff] [blame]4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
Yaowu Xuc27fc142016-08-22 16:08:15 -0700[diff] [blame]10 */
11
Yaowu Xuf883b422016-08-30 14:01:10 -0700[diff] [blame]12#ifndef AOM_DSP_TXFM_COMMON_H_
13#define AOM_DSP_TXFM_COMMON_H_
Yaowu Xuc27fc142016-08-22 16:08:15 -0700[diff] [blame]14
Yaowu Xuf883b422016-08-30 14:01:10 -0700[diff] [blame]15#include "aom_dsp/aom_dsp_common.h"
Yaowu Xuc27fc142016-08-22 16:08:15 -0700[diff] [blame]16
17// Constants and Macros used by all idct/dct functions
18#define DCT_CONST_BITS 14
19#define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1))
20
21#define UNIT_QUANT_SHIFT 2
22#define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT)
23
24// Constants:
25// for (int i = 1; i< 32; ++i)
26// printf("static const int cospi_%d_64 = %.0f;\n", i,
27// round(16384 * cos(i*M_PI/64)));
28// Note: sin(k*Pi/64) = cos((32-k)*Pi/64)
29static const tran_high_t cospi_1_64 = 16364;
30static const tran_high_t cospi_2_64 = 16305;
31static const tran_high_t cospi_3_64 = 16207;
32static const tran_high_t cospi_4_64 = 16069;
33static const tran_high_t cospi_5_64 = 15893;
34static const tran_high_t cospi_6_64 = 15679;
35static const tran_high_t cospi_7_64 = 15426;
36static const tran_high_t cospi_8_64 = 15137;
37static const tran_high_t cospi_9_64 = 14811;
38static const tran_high_t cospi_10_64 = 14449;
39static const tran_high_t cospi_11_64 = 14053;
40static const tran_high_t cospi_12_64 = 13623;
41static const tran_high_t cospi_13_64 = 13160;
42static const tran_high_t cospi_14_64 = 12665;
43static const tran_high_t cospi_15_64 = 12140;
44static const tran_high_t cospi_16_64 = 11585;
45static const tran_high_t cospi_17_64 = 11003;
46static const tran_high_t cospi_18_64 = 10394;
47static const tran_high_t cospi_19_64 = 9760;
48static const tran_high_t cospi_20_64 = 9102;
49static const tran_high_t cospi_21_64 = 8423;
50static const tran_high_t cospi_22_64 = 7723;
51static const tran_high_t cospi_23_64 = 7005;
52static const tran_high_t cospi_24_64 = 6270;
53static const tran_high_t cospi_25_64 = 5520;
54static const tran_high_t cospi_26_64 = 4756;
55static const tran_high_t cospi_27_64 = 3981;
56static const tran_high_t cospi_28_64 = 3196;
57static const tran_high_t cospi_29_64 = 2404;
58static const tran_high_t cospi_30_64 = 1606;
59static const tran_high_t cospi_31_64 = 804;
60
Yaowu Xu9c01aa12016-09-01 14:32:49 -0700[diff] [blame]61// 16384 * sqrt(2) * sin(kPi/9) * 2 / 3
Yaowu Xuc27fc142016-08-22 16:08:15 -0700[diff] [blame]62static const tran_high_t sinpi_1_9 = 5283;
63static const tran_high_t sinpi_2_9 = 9929;
64static const tran_high_t sinpi_3_9 = 13377;
65static const tran_high_t sinpi_4_9 = 15212;
66
67// 16384 * sqrt(2)
68static const tran_high_t Sqrt2 = 23170;
69
Yaowu Xuf883b422016-08-30 14:01:10 -0700[diff] [blame]70#endif // AOM_DSP_TXFM_COMMON_H_