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) 28 static const tran_high_t cospi_1_64 = 16364; 29 static const tran_high_t cospi_2_64 = 16305; 30 static const tran_high_t cospi_3_64 = 16207; 31 static const tran_high_t cospi_4_64 = 16069; 32 static const tran_high_t cospi_5_64 = 15893; 33 static const tran_high_t cospi_6_64 = 15679; 34 static const tran_high_t cospi_7_64 = 15426; 35 static const tran_high_t cospi_8_64 = 15137; 36 static const tran_high_t cospi_9_64 = 14811; 37 static const tran_high_t cospi_10_64 = 14449; 38 static const tran_high_t cospi_11_64 = 14053; 39 static const tran_high_t cospi_12_64 = 13623; 40 static const tran_high_t cospi_13_64 = 13160; 41 static const tran_high_t cospi_14_64 = 12665; 42 static const tran_high_t cospi_15_64 = 12140; 43 static const tran_high_t cospi_16_64 = 11585; 44 static const tran_high_t cospi_17_64 = 11003; 45 static const tran_high_t cospi_18_64 = 10394; 46 static const tran_high_t cospi_19_64 = 9760; 47 static const tran_high_t cospi_20_64 = 9102; 48 static const tran_high_t cospi_21_64 = 8423; 49 static const tran_high_t cospi_22_64 = 7723; 50 static const tran_high_t cospi_23_64 = 7005; 51 static const tran_high_t cospi_24_64 = 6270; 52 static const tran_high_t cospi_25_64 = 5520; 53 static const tran_high_t cospi_26_64 = 4756; 54 static const tran_high_t cospi_27_64 = 3981; 55 static const tran_high_t cospi_28_64 = 3196; 56 static const tran_high_t cospi_29_64 = 2404; 57 static const tran_high_t cospi_30_64 = 1606; 58 static const tran_high_t cospi_31_64 = 804; 59 60 // 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 61 static const tran_high_t sinpi_1_9 = 5283; 62 static const tran_high_t sinpi_2_9 = 9929; 63 static const tran_high_t sinpi_3_9 = 13377; 64 static const tran_high_t sinpi_4_9 = 15212; 65 66 #endif // VPX_DSP_TXFM_COMMON_H_ 67
