2015-07-24 01:35:44 +02:00
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/*
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* Copyright (c) 2015 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VPX_DSP_TXFM_COMMON_H_
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#define VPX_DSP_TXFM_COMMON_H_
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#include "vpx_dsp/vpx_dsp_common.h"
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// Constants and Macros used by all idct/dct functions
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#define DCT_CONST_BITS 14
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2016-07-23 05:07:03 +02:00
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#define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1))
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2015-07-24 01:35:44 +02:00
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#define UNIT_QUANT_SHIFT 2
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#define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT)
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// Constants:
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// for (int i = 1; i< 32; ++i)
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// printf("static const int cospi_%d_64 = %.0f;\n", i,
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// round(16384 * cos(i*M_PI/64)));
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// Note: sin(k*Pi/64) = cos((32-k)*Pi/64)
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2017-09-13 02:13:17 +02:00
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static const tran_coef_t cospi_1_64 = 16364;
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static const tran_coef_t cospi_2_64 = 16305;
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static const tran_coef_t cospi_3_64 = 16207;
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static const tran_coef_t cospi_4_64 = 16069;
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static const tran_coef_t cospi_5_64 = 15893;
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static const tran_coef_t cospi_6_64 = 15679;
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static const tran_coef_t cospi_7_64 = 15426;
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static const tran_coef_t cospi_8_64 = 15137;
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static const tran_coef_t cospi_9_64 = 14811;
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static const tran_coef_t cospi_10_64 = 14449;
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static const tran_coef_t cospi_11_64 = 14053;
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static const tran_coef_t cospi_12_64 = 13623;
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static const tran_coef_t cospi_13_64 = 13160;
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static const tran_coef_t cospi_14_64 = 12665;
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static const tran_coef_t cospi_15_64 = 12140;
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static const tran_coef_t cospi_16_64 = 11585;
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static const tran_coef_t cospi_17_64 = 11003;
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static const tran_coef_t cospi_18_64 = 10394;
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static const tran_coef_t cospi_19_64 = 9760;
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static const tran_coef_t cospi_20_64 = 9102;
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static const tran_coef_t cospi_21_64 = 8423;
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static const tran_coef_t cospi_22_64 = 7723;
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static const tran_coef_t cospi_23_64 = 7005;
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static const tran_coef_t cospi_24_64 = 6270;
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static const tran_coef_t cospi_25_64 = 5520;
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static const tran_coef_t cospi_26_64 = 4756;
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static const tran_coef_t cospi_27_64 = 3981;
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static const tran_coef_t cospi_28_64 = 3196;
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static const tran_coef_t cospi_29_64 = 2404;
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static const tran_coef_t cospi_30_64 = 1606;
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static const tran_coef_t cospi_31_64 = 804;
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2015-07-24 01:35:44 +02:00
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// 16384 * sqrt(2) * sin(kPi/9) * 2 / 3
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2017-09-13 00:24:54 +02:00
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static const tran_coef_t sinpi_1_9 = 5283;
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static const tran_coef_t sinpi_2_9 = 9929;
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static const tran_coef_t sinpi_3_9 = 13377;
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static const tran_coef_t sinpi_4_9 = 15212;
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2015-07-24 01:35:44 +02:00
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#endif // VPX_DSP_TXFM_COMMON_H_
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