1 /* 2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AOM_DSP_TXFM_COMMON_H_ 13 #define AOM_AOM_DSP_TXFM_COMMON_H_ 14 15 #include "aom_dsp/aom_dsp_common.h" 16 #include "av1/common/enums.h" 17 18 // Constants and Macros used by all idct/dct functions 19 #define DCT_CONST_BITS 14 20 #define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1)) 21 22 #define UNIT_QUANT_SHIFT 2 23 #define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT) 24 25 typedef struct txfm_param { 26 // for both forward and inverse transforms 27 TX_TYPE tx_type; 28 TX_SIZE tx_size; 29 int lossless; 30 int bd; 31 // are the pixel buffers octets or shorts? This should collapse to 32 // bd==8 implies !is_hbd, but that's not certain right now. 33 int is_hbd; 34 TxSetType tx_set_type; 35 // for inverse transforms only 36 int eob; 37 } TxfmParam; 38 39 // Constants: 40 // for (int i = 1; i< 32; ++i) 41 // printf("static const int cospi_%d_64 = %.0f;\n", i, 42 // round(16384 * cos(i*M_PI/64))); 43 // Note: sin(k*Pi/64) = cos((32-k)*Pi/64) 44 static const tran_high_t cospi_1_64 = 16364; 45 static const tran_high_t cospi_2_64 = 16305; 46 static const tran_high_t cospi_3_64 = 16207; 47 static const tran_high_t cospi_4_64 = 16069; 48 static const tran_high_t cospi_5_64 = 15893; 49 static const tran_high_t cospi_6_64 = 15679; 50 static const tran_high_t cospi_7_64 = 15426; 51 static const tran_high_t cospi_8_64 = 15137; 52 static const tran_high_t cospi_9_64 = 14811; 53 static const tran_high_t cospi_10_64 = 14449; 54 static const tran_high_t cospi_11_64 = 14053; 55 static const tran_high_t cospi_12_64 = 13623; 56 static const tran_high_t cospi_13_64 = 13160; 57 static const tran_high_t cospi_14_64 = 12665; 58 static const tran_high_t cospi_15_64 = 12140; 59 static const tran_high_t cospi_16_64 = 11585; 60 static const tran_high_t cospi_17_64 = 11003; 61 static const tran_high_t cospi_18_64 = 10394; 62 static const tran_high_t cospi_19_64 = 9760; 63 static const tran_high_t cospi_20_64 = 9102; 64 static const tran_high_t cospi_21_64 = 8423; 65 static const tran_high_t cospi_22_64 = 7723; 66 static const tran_high_t cospi_23_64 = 7005; 67 static const tran_high_t cospi_24_64 = 6270; 68 static const tran_high_t cospi_25_64 = 5520; 69 static const tran_high_t cospi_26_64 = 4756; 70 static const tran_high_t cospi_27_64 = 3981; 71 static const tran_high_t cospi_28_64 = 3196; 72 static const tran_high_t cospi_29_64 = 2404; 73 static const tran_high_t cospi_30_64 = 1606; 74 static const tran_high_t cospi_31_64 = 804; 75 76 // 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 77 static const tran_high_t sinpi_1_9 = 5283; 78 static const tran_high_t sinpi_2_9 = 9929; 79 static const tran_high_t sinpi_3_9 = 13377; 80 static const tran_high_t sinpi_4_9 = 15212; 81 82 // 16384 * sqrt(2) 83 static const tran_high_t Sqrt2 = 23170; 84 static const tran_high_t InvSqrt2 = 11585; 85 fdct_round_shift(tran_high_t input)86static INLINE tran_high_t fdct_round_shift(tran_high_t input) { 87 tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS); 88 return rv; 89 } 90 91 #endif // AOM_AOM_DSP_TXFM_COMMON_H_ 92