ref: aa5b517a39ae9f311129636a2c0dc41892d3d44f
dir: /vpx_dsp/txfm_common.h/
/* * 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_DSP_TXFM_COMMON_H_ #define 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_high_t cospi_1_64 = 16364; static const tran_high_t cospi_2_64 = 16305; static const tran_high_t cospi_3_64 = 16207; static const tran_high_t cospi_4_64 = 16069; static const tran_high_t cospi_5_64 = 15893; static const tran_high_t cospi_6_64 = 15679; static const tran_high_t cospi_7_64 = 15426; static const tran_high_t cospi_8_64 = 15137; static const tran_high_t cospi_9_64 = 14811; static const tran_high_t cospi_10_64 = 14449; static const tran_high_t cospi_11_64 = 14053; static const tran_high_t cospi_12_64 = 13623; static const tran_high_t cospi_13_64 = 13160; static const tran_high_t cospi_14_64 = 12665; static const tran_high_t cospi_15_64 = 12140; static const tran_high_t cospi_16_64 = 11585; static const tran_high_t cospi_17_64 = 11003; static const tran_high_t cospi_18_64 = 10394; static const tran_high_t cospi_19_64 = 9760; static const tran_high_t cospi_20_64 = 9102; static const tran_high_t cospi_21_64 = 8423; static const tran_high_t cospi_22_64 = 7723; static const tran_high_t cospi_23_64 = 7005; static const tran_high_t cospi_24_64 = 6270; static const tran_high_t cospi_25_64 = 5520; static const tran_high_t cospi_26_64 = 4756; static const tran_high_t cospi_27_64 = 3981; static const tran_high_t cospi_28_64 = 3196; static const tran_high_t cospi_29_64 = 2404; static const tran_high_t cospi_30_64 = 1606; static const tran_high_t cospi_31_64 = 804; // 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 static const tran_high_t sinpi_1_9 = 5283; static const tran_high_t sinpi_2_9 = 9929; static const tran_high_t sinpi_3_9 = 13377; static const tran_high_t sinpi_4_9 = 15212; #endif // VPX_DSP_TXFM_COMMON_H_