/* * Copyright (c) 2010 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 VP9_COMMON_VP9_IDCT_H_ #define VP9_COMMON_VP9_IDCT_H_ #include #include "./vpx_config.h" #include "vpx/vpx_integer.h" #include "vp9/common/vp9_common.h" #include "vp9/common/vp9_enums.h" #ifdef __cplusplus extern "C" { #endif // 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) #define pair_set_epi16(a, b) \ _mm_set_epi16(b, a, b, a, b, a, b, a) #define dual_set_epi16(a, b) \ _mm_set_epi16(b, b, b, b, a, a, a, a) // Note: // tran_low_t is the datatype used for final transform coefficients. // tran_high_t is the datatype used for intermediate transform stages. #if CONFIG_VP9_HIGHBITDEPTH typedef int64_t tran_high_t; typedef int32_t tran_low_t; #else typedef int32_t tran_high_t; typedef int16_t tran_low_t; #endif // 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; static INLINE tran_low_t dct_const_round_shift(tran_high_t input) { tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS); #if CONFIG_VP9_HIGHBITDEPTH // For valid highbitdepth VP9 streams, intermediate stage coefficients will // stay within the ranges: // - 8 bit: signed 16 bit integer // - 10 bit: signed 18 bit integer // - 12 bit: signed 20 bit integer #elif CONFIG_COEFFICIENT_RANGE_CHECKING // For valid VP9 input streams, intermediate stage coefficients should always // stay within the range of a signed 16 bit integer. Coefficients can go out // of this range for invalid/corrupt VP9 streams. However, strictly checking // this range for every intermediate coefficient can burdensome for a decoder, // therefore the following assertion is only enabled when configured with // --enable-coefficient-range-checking. assert(INT16_MIN <= rv); assert(rv <= INT16_MAX); #endif return (tran_low_t)rv; } typedef void (*transform_1d)(const tran_low_t*, tran_low_t*); typedef struct { transform_1d cols, rows; // vertical and horizontal } transform_2d; #if CONFIG_VP9_HIGHBITDEPTH typedef void (*high_transform_1d)(const tran_low_t*, tran_low_t*, int bd); typedef struct { high_transform_1d cols, rows; // vertical and horizontal } high_transform_2d; #endif // CONFIG_VP9_HIGHBITDEPTH void vp9_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride, int eob); void vp9_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride, int eob); void vp9_idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride, int eob); void vp9_idct16x16_add(const tran_low_t *input, uint8_t *dest, int stride, int eob); void vp9_idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride, int eob); void vp9_iht4x4_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, int stride, int eob); void vp9_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, int stride, int eob); void vp9_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, int stride, int eob); #if CONFIG_VP9_HIGHBITDEPTH void vp9_high_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_high_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_high_idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_high_idct16x16_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_high_idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_high_iht4x4_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_high_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_high_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); #endif // CONFIG_VP9_HIGHBITDEPTH #ifdef __cplusplus } // extern "C" #endif #endif // VP9_COMMON_VP9_IDCT_H_