| /* |
| * Copyright (c) 2015 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 VPX_VPX_DSP_TXFM_COMMON_H_ |
| #define VPX_VPX_DSP_TXFM_COMMON_H_ |
| |
| #include "vpx_dsp/vpx_dsp_common.h" |
| |
| // Constants and Macros used by all idct/dct functions |
| #define DCT_CONST_BITS 14 |
| #define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1)) |
| |
| #define UNIT_QUANT_SHIFT 2 |
| #define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT) |
| |
| // Constants: |
| // for (int i = 1; i< 32; ++i) |
| // printf("static const int cospi_%d_64 = %.0f;\n", i, |
| // round(16384 * cos(i*M_PI/64))); |
| // Note: sin(k*Pi/64) = cos((32-k)*Pi/64) |
| static const tran_coef_t cospi_1_64 = 16364; |
| static const tran_coef_t cospi_2_64 = 16305; |
| static const tran_coef_t cospi_3_64 = 16207; |
| static const tran_coef_t cospi_4_64 = 16069; |
| static const tran_coef_t cospi_5_64 = 15893; |
| static const tran_coef_t cospi_6_64 = 15679; |
| static const tran_coef_t cospi_7_64 = 15426; |
| static const tran_coef_t cospi_8_64 = 15137; |
| static const tran_coef_t cospi_9_64 = 14811; |
| static const tran_coef_t cospi_10_64 = 14449; |
| static const tran_coef_t cospi_11_64 = 14053; |
| static const tran_coef_t cospi_12_64 = 13623; |
| static const tran_coef_t cospi_13_64 = 13160; |
| static const tran_coef_t cospi_14_64 = 12665; |
| static const tran_coef_t cospi_15_64 = 12140; |
| static const tran_coef_t cospi_16_64 = 11585; |
| static const tran_coef_t cospi_17_64 = 11003; |
| static const tran_coef_t cospi_18_64 = 10394; |
| static const tran_coef_t cospi_19_64 = 9760; |
| static const tran_coef_t cospi_20_64 = 9102; |
| static const tran_coef_t cospi_21_64 = 8423; |
| static const tran_coef_t cospi_22_64 = 7723; |
| static const tran_coef_t cospi_23_64 = 7005; |
| static const tran_coef_t cospi_24_64 = 6270; |
| static const tran_coef_t cospi_25_64 = 5520; |
| static const tran_coef_t cospi_26_64 = 4756; |
| static const tran_coef_t cospi_27_64 = 3981; |
| static const tran_coef_t cospi_28_64 = 3196; |
| static const tran_coef_t cospi_29_64 = 2404; |
| static const tran_coef_t cospi_30_64 = 1606; |
| static const tran_coef_t cospi_31_64 = 804; |
| |
| // 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 |
| static const tran_coef_t sinpi_1_9 = 5283; |
| static const tran_coef_t sinpi_2_9 = 9929; |
| static const tran_coef_t sinpi_3_9 = 13377; |
| static const tran_coef_t sinpi_4_9 = 15212; |
| |
| #endif // VPX_VPX_DSP_TXFM_COMMON_H_ |
