1 /* 2 * Copyright (c) 2010 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 VP9_COMMON_VP9_IDCT_H_ 12 #define VP9_COMMON_VP9_IDCT_H_ 13 14 #include <assert.h> 15 16 #include "./vpx_config.h" 17 #include "vpx/vpx_integer.h" 18 #include "vp9/common/vp9_common.h" 19 #include "vp9/common/vp9_enums.h" 20 21 #ifdef __cplusplus 22 extern "C" { 23 #endif 24 25 26 // Constants and Macros used by all idct/dct functions 27 #define DCT_CONST_BITS 14 28 #define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1)) 29 30 #define UNIT_QUANT_SHIFT 2 31 #define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT) 32 33 #define pair_set_epi16(a, b) \ 34 _mm_set_epi16(b, a, b, a, b, a, b, a) 35 36 #define dual_set_epi16(a, b) \ 37 _mm_set_epi16(b, b, b, b, a, a, a, a) 38 39 // Note: 40 // tran_low_t is the datatype used for final transform coefficients. 41 // tran_high_t is the datatype used for intermediate transform stages. 42 #if CONFIG_VP9_HIGHBITDEPTH 43 typedef int64_t tran_high_t; 44 typedef int32_t tran_low_t; 45 #else 46 typedef int32_t tran_high_t; 47 typedef int16_t tran_low_t; 48 #endif 49 50 // Constants: 51 // for (int i = 1; i< 32; ++i) 52 // printf("static const int cospi_%d_64 = %.0f;\n", i, 53 // round(16384 * cos(i*M_PI/64))); 54 // Note: sin(k*Pi/64) = cos((32-k)*Pi/64) 55 static const tran_high_t cospi_1_64 = 16364; 56 static const tran_high_t cospi_2_64 = 16305; 57 static const tran_high_t cospi_3_64 = 16207; 58 static const tran_high_t cospi_4_64 = 16069; 59 static const tran_high_t cospi_5_64 = 15893; 60 static const tran_high_t cospi_6_64 = 15679; 61 static const tran_high_t cospi_7_64 = 15426; 62 static const tran_high_t cospi_8_64 = 15137; 63 static const tran_high_t cospi_9_64 = 14811; 64 static const tran_high_t cospi_10_64 = 14449; 65 static const tran_high_t cospi_11_64 = 14053; 66 static const tran_high_t cospi_12_64 = 13623; 67 static const tran_high_t cospi_13_64 = 13160; 68 static const tran_high_t cospi_14_64 = 12665; 69 static const tran_high_t cospi_15_64 = 12140; 70 static const tran_high_t cospi_16_64 = 11585; 71 static const tran_high_t cospi_17_64 = 11003; 72 static const tran_high_t cospi_18_64 = 10394; 73 static const tran_high_t cospi_19_64 = 9760; 74 static const tran_high_t cospi_20_64 = 9102; 75 static const tran_high_t cospi_21_64 = 8423; 76 static const tran_high_t cospi_22_64 = 7723; 77 static const tran_high_t cospi_23_64 = 7005; 78 static const tran_high_t cospi_24_64 = 6270; 79 static const tran_high_t cospi_25_64 = 5520; 80 static const tran_high_t cospi_26_64 = 4756; 81 static const tran_high_t cospi_27_64 = 3981; 82 static const tran_high_t cospi_28_64 = 3196; 83 static const tran_high_t cospi_29_64 = 2404; 84 static const tran_high_t cospi_30_64 = 1606; 85 static const tran_high_t cospi_31_64 = 804; 86 87 // 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 88 static const tran_high_t sinpi_1_9 = 5283; 89 static const tran_high_t sinpi_2_9 = 9929; 90 static const tran_high_t sinpi_3_9 = 13377; 91 static const tran_high_t sinpi_4_9 = 15212; 92 93 static INLINE tran_low_t dct_const_round_shift(tran_high_t input) { 94 tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS); 95 #if CONFIG_VP9_HIGHBITDEPTH 96 // For valid highbitdepth VP9 streams, intermediate stage coefficients will 97 // stay within the ranges: 98 // - 8 bit: signed 16 bit integer 99 // - 10 bit: signed 18 bit integer 100 // - 12 bit: signed 20 bit integer 101 #elif CONFIG_COEFFICIENT_RANGE_CHECKING 102 // For valid VP9 input streams, intermediate stage coefficients should always 103 // stay within the range of a signed 16 bit integer. Coefficients can go out 104 // of this range for invalid/corrupt VP9 streams. However, strictly checking 105 // this range for every intermediate coefficient can burdensome for a decoder, 106 // therefore the following assertion is only enabled when configured with 107 // --enable-coefficient-range-checking. 108 assert(INT16_MIN <= rv); 109 assert(rv <= INT16_MAX); 110 #endif 111 return (tran_low_t)rv; 112 } 113 114 typedef void (*transform_1d)(const tran_low_t*, tran_low_t*); 115 116 typedef struct { 117 transform_1d cols, rows; // vertical and horizontal 118 } transform_2d; 119 120 #if CONFIG_VP9_HIGHBITDEPTH 121 typedef void (*high_transform_1d)(const tran_low_t*, tran_low_t*, int bd); 122 123 typedef struct { 124 high_transform_1d cols, rows; // vertical and horizontal 125 } high_transform_2d; 126 #endif // CONFIG_VP9_HIGHBITDEPTH 127 128 void vp9_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride, 129 int eob); 130 void vp9_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride, 131 int eob); 132 void vp9_idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride, 133 int eob); 134 void vp9_idct16x16_add(const tran_low_t *input, uint8_t *dest, int stride, int 135 eob); 136 void vp9_idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride, 137 int eob); 138 139 void vp9_iht4x4_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, 140 int stride, int eob); 141 void vp9_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, 142 int stride, int eob); 143 void vp9_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, 144 int stride, int eob); 145 146 #if CONFIG_VP9_HIGHBITDEPTH 147 void vp9_high_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride, 148 int eob, int bd); 149 void vp9_high_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride, 150 int eob, int bd); 151 void vp9_high_idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride, 152 int eob, int bd); 153 void vp9_high_idct16x16_add(const tran_low_t *input, uint8_t *dest, int stride, 154 int eob, int bd); 155 void vp9_high_idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride, 156 int eob, int bd); 157 void vp9_high_iht4x4_add(TX_TYPE tx_type, const tran_low_t *input, 158 uint8_t *dest, int stride, int eob, int bd); 159 void vp9_high_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input, 160 uint8_t *dest, int stride, int eob, int bd); 161 void vp9_high_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, 162 uint8_t *dest, int stride, int eob, int bd); 163 #endif // CONFIG_VP9_HIGHBITDEPTH 164 #ifdef __cplusplus 165 } // extern "C" 166 #endif 167 168 #endif // VP9_COMMON_VP9_IDCT_H_ 169
