1*fb1b10abSAndroid Build Coastguard Worker /* 2*fb1b10abSAndroid Build Coastguard Worker * Copyright (c) 2015 The WebM project authors. All Rights Reserved. 3*fb1b10abSAndroid Build Coastguard Worker * 4*fb1b10abSAndroid Build Coastguard Worker * Use of this source code is governed by a BSD-style license 5*fb1b10abSAndroid Build Coastguard Worker * that can be found in the LICENSE file in the root of the source 6*fb1b10abSAndroid Build Coastguard Worker * tree. An additional intellectual property rights grant can be found 7*fb1b10abSAndroid Build Coastguard Worker * in the file PATENTS. All contributing project authors may 8*fb1b10abSAndroid Build Coastguard Worker * be found in the AUTHORS file in the root of the source tree. 9*fb1b10abSAndroid Build Coastguard Worker */ 10*fb1b10abSAndroid Build Coastguard Worker 11*fb1b10abSAndroid Build Coastguard Worker #ifndef VPX_VPX_DSP_TXFM_COMMON_H_ 12*fb1b10abSAndroid Build Coastguard Worker #define VPX_VPX_DSP_TXFM_COMMON_H_ 13*fb1b10abSAndroid Build Coastguard Worker 14*fb1b10abSAndroid Build Coastguard Worker #include "vpx_dsp/vpx_dsp_common.h" 15*fb1b10abSAndroid Build Coastguard Worker 16*fb1b10abSAndroid Build Coastguard Worker // Constants and Macros used by all idct/dct functions 17*fb1b10abSAndroid Build Coastguard Worker #define DCT_CONST_BITS 14 18*fb1b10abSAndroid Build Coastguard Worker #define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1)) 19*fb1b10abSAndroid Build Coastguard Worker 20*fb1b10abSAndroid Build Coastguard Worker #define UNIT_QUANT_SHIFT 2 21*fb1b10abSAndroid Build Coastguard Worker #define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT) 22*fb1b10abSAndroid Build Coastguard Worker 23*fb1b10abSAndroid Build Coastguard Worker // Constants: 24*fb1b10abSAndroid Build Coastguard Worker // for (int i = 1; i< 32; ++i) 25*fb1b10abSAndroid Build Coastguard Worker // printf("static const int cospi_%d_64 = %.0f;\n", i, 26*fb1b10abSAndroid Build Coastguard Worker // round(16384 * cos(i*M_PI/64))); 27*fb1b10abSAndroid Build Coastguard Worker // Note: sin(k*Pi/64) = cos((32-k)*Pi/64) 28*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_1_64 = 16364; 29*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_2_64 = 16305; 30*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_3_64 = 16207; 31*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_4_64 = 16069; 32*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_5_64 = 15893; 33*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_6_64 = 15679; 34*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_7_64 = 15426; 35*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_8_64 = 15137; 36*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_9_64 = 14811; 37*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_10_64 = 14449; 38*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_11_64 = 14053; 39*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_12_64 = 13623; 40*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_13_64 = 13160; 41*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_14_64 = 12665; 42*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_15_64 = 12140; 43*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_16_64 = 11585; 44*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_17_64 = 11003; 45*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_18_64 = 10394; 46*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_19_64 = 9760; 47*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_20_64 = 9102; 48*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_21_64 = 8423; 49*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_22_64 = 7723; 50*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_23_64 = 7005; 51*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_24_64 = 6270; 52*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_25_64 = 5520; 53*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_26_64 = 4756; 54*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_27_64 = 3981; 55*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_28_64 = 3196; 56*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_29_64 = 2404; 57*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_30_64 = 1606; 58*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t cospi_31_64 = 804; 59*fb1b10abSAndroid Build Coastguard Worker 60*fb1b10abSAndroid Build Coastguard Worker // 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 61*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t sinpi_1_9 = 5283; 62*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t sinpi_2_9 = 9929; 63*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t sinpi_3_9 = 13377; 64*fb1b10abSAndroid Build Coastguard Worker static const tran_coef_t sinpi_4_9 = 15212; 65*fb1b10abSAndroid Build Coastguard Worker 66*fb1b10abSAndroid Build Coastguard Worker #endif // VPX_VPX_DSP_TXFM_COMMON_H_ 67