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 22 // Constants and Macros used by all idct/dct functions 23 #define DCT_CONST_BITS 14 24 #define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1)) 25 26 #define UNIT_QUANT_SHIFT 2 27 #define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT) 28 29 #define pair_set_epi16(a, b) \ 30 _mm_set_epi16(b, a, b, a, b, a, b, a) 31 32 #define pair_set_epi32(a, b) \ 33 _mm_set_epi32(b, a, b, a) 34 35 // Constants: 36 // for (int i = 1; i< 32; ++i) 37 // printf("static const int cospi_%d_64 = %.0f;\n", i, 38 // round(16384 * cos(i*M_PI/64))); 39 // Note: sin(k*Pi/64) = cos((32-k)*Pi/64) 40 static const int cospi_1_64 = 16364; 41 static const int cospi_2_64 = 16305; 42 static const int cospi_3_64 = 16207; 43 static const int cospi_4_64 = 16069; 44 static const int cospi_5_64 = 15893; 45 static const int cospi_6_64 = 15679; 46 static const int cospi_7_64 = 15426; 47 static const int cospi_8_64 = 15137; 48 static const int cospi_9_64 = 14811; 49 static const int cospi_10_64 = 14449; 50 static const int cospi_11_64 = 14053; 51 static const int cospi_12_64 = 13623; 52 static const int cospi_13_64 = 13160; 53 static const int cospi_14_64 = 12665; 54 static const int cospi_15_64 = 12140; 55 static const int cospi_16_64 = 11585; 56 static const int cospi_17_64 = 11003; 57 static const int cospi_18_64 = 10394; 58 static const int cospi_19_64 = 9760; 59 static const int cospi_20_64 = 9102; 60 static const int cospi_21_64 = 8423; 61 static const int cospi_22_64 = 7723; 62 static const int cospi_23_64 = 7005; 63 static const int cospi_24_64 = 6270; 64 static const int cospi_25_64 = 5520; 65 static const int cospi_26_64 = 4756; 66 static const int cospi_27_64 = 3981; 67 static const int cospi_28_64 = 3196; 68 static const int cospi_29_64 = 2404; 69 static const int cospi_30_64 = 1606; 70 static const int cospi_31_64 = 804; 71 72 // 16384 * sqrt(2) * sin(kPi/9) * 2 / 3 73 static const int sinpi_1_9 = 5283; 74 static const int sinpi_2_9 = 9929; 75 static const int sinpi_3_9 = 13377; 76 static const int sinpi_4_9 = 15212; 77 78 static INLINE int dct_const_round_shift(int input) { 79 int rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS); 80 assert(INT16_MIN <= rv && rv <= INT16_MAX); 81 return rv; 82 } 83 84 typedef void (*transform_1d)(const int16_t*, int16_t*); 85 86 typedef struct { 87 transform_1d cols, rows; // vertical and horizontal 88 } transform_2d; 89 90 void vp9_iwht4x4_add(const int16_t *input, uint8_t *dest, int stride, int eob); 91 92 void vp9_idct4x4_add(const int16_t *input, uint8_t *dest, int stride, int eob); 93 void vp9_idct8x8_add(const int16_t *input, uint8_t *dest, int stride, int eob); 94 void vp9_idct16x16_add(const int16_t *input, uint8_t *dest, int stride, int 95 eob); 96 void vp9_idct32x32_add(const int16_t *input, uint8_t *dest, int stride, 97 int eob); 98 99 void vp9_iht4x4_add(TX_TYPE tx_type, const int16_t *input, uint8_t *dest, 100 int stride, int eob); 101 void vp9_iht8x8_add(TX_TYPE tx_type, const int16_t *input, uint8_t *dest, 102 int stride, int eob); 103 void vp9_iht16x16_add(TX_TYPE tx_type, const int16_t *input, uint8_t *dest, 104 int stride, int eob); 105 106 107 #endif // VP9_COMMON_VP9_IDCT_H_ 108
