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aomedia / avm / c8e5a7749cfd2aa72f73777b7e0a59d7faa99744 / . / vpx_dsp / txfm_common.h
blob: 442e6a57b5ba5d84a7435674c7ff7f4217b3a0ce [file] [log] [blame]
Jingning Han5ebc8fe2015-07-23 16:35:44 -0700[diff] [blame]1/*
2 * Copyright (c) 2015 The WebM project authors. All Rights Reserved.
3 *
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.
9 */
10
11#ifndef VPX_DSP_TXFM_COMMON_H_
12#define VPX_DSP_TXFM_COMMON_H_
13
14#include "vpx_dsp/vpx_dsp_common.h"
15
16// Constants and Macros used by all idct/dct functions
17#define DCT_CONST_BITS 14
18#define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1))
19
20#define UNIT_QUANT_SHIFT 2
21#define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT)
22
23// Constants:
24// for (int i = 1; i< 32; ++i)
25// printf("static const int cospi_%d_64 = %.0f;\n", i,
26// round(16384 * cos(i*M_PI/64)));
27// Note: sin(k*Pi/64) = cos((32-k)*Pi/64)
28static const tran_high_t cospi_1_64 = 16364;
29static const tran_high_t cospi_2_64 = 16305;
30static const tran_high_t cospi_3_64 = 16207;
31static const tran_high_t cospi_4_64 = 16069;
32static const tran_high_t cospi_5_64 = 15893;
33static const tran_high_t cospi_6_64 = 15679;
34static const tran_high_t cospi_7_64 = 15426;
35static const tran_high_t cospi_8_64 = 15137;
36static const tran_high_t cospi_9_64 = 14811;
37static const tran_high_t cospi_10_64 = 14449;
38static const tran_high_t cospi_11_64 = 14053;
39static const tran_high_t cospi_12_64 = 13623;
40static const tran_high_t cospi_13_64 = 13160;
41static const tran_high_t cospi_14_64 = 12665;
42static const tran_high_t cospi_15_64 = 12140;
43static const tran_high_t cospi_16_64 = 11585;
44static const tran_high_t cospi_17_64 = 11003;
45static const tran_high_t cospi_18_64 = 10394;
46static const tran_high_t cospi_19_64 = 9760;
47static const tran_high_t cospi_20_64 = 9102;
48static const tran_high_t cospi_21_64 = 8423;
49static const tran_high_t cospi_22_64 = 7723;
50static const tran_high_t cospi_23_64 = 7005;
51static const tran_high_t cospi_24_64 = 6270;
52static const tran_high_t cospi_25_64 = 5520;
53static const tran_high_t cospi_26_64 = 4756;
54static const tran_high_t cospi_27_64 = 3981;
55static const tran_high_t cospi_28_64 = 3196;
56static const tran_high_t cospi_29_64 = 2404;
57static const tran_high_t cospi_30_64 = 1606;
58static const tran_high_t cospi_31_64 = 804;
59
60// 16384 * sqrt(2) * sin(kPi/9) * 2 / 3
61static const tran_high_t sinpi_1_9 = 5283;
62static const tran_high_t sinpi_2_9 = 9929;
63static const tran_high_t sinpi_3_9 = 13377;
64static const tran_high_t sinpi_4_9 = 15212;
65
66#endif // VPX_DSP_TXFM_COMMON_H_