/* * 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_ports/mem.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((int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a), \ (int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a)) #define dual_set_epi16(a, b) \ _mm_set_epi16((int16_t)(b), (int16_t)(b), (int16_t)(b), (int16_t)(b), \ (int16_t)(a), (int16_t)(a), (int16_t)(a), (int16_t)(a)) // 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 check_range(tran_high_t input) { #if 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 <= input); assert(input <= INT16_MAX); #endif // CONFIG_COEFFICIENT_RANGE_CHECKING return (tran_low_t)input; } 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); return check_range(rv); } #if CONFIG_VP9_HIGHBITDEPTH static INLINE tran_low_t highbd_check_range(tran_high_t input, int bd) { #if CONFIG_COEFFICIENT_RANGE_CHECKING // 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 const int32_t int_max = (1 << (7 + bd)) - 1; const int32_t int_min = -int_max - 1; assert(int_min <= input); assert(input <= int_max); (void) int_min; #endif // CONFIG_COEFFICIENT_RANGE_CHECKING (void) bd; return (tran_low_t)input; } static INLINE tran_low_t highbd_dct_const_round_shift(tran_high_t input, int bd) { tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS); return highbd_check_range(rv, bd); } #endif // CONFIG_VP9_HIGHBITDEPTH 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 (*highbd_transform_1d)(const tran_low_t*, tran_low_t*, int bd); typedef struct { highbd_transform_1d cols, rows; // vertical and horizontal } highbd_transform_2d; #endif // CONFIG_VP9_HIGHBITDEPTH #if CONFIG_EMULATE_HARDWARE // When CONFIG_EMULATE_HARDWARE is 1 the transform performs a // non-normative method to handle overflows. A stream that causes // overflows in the inverse transform is considered invalid in VP9, // and a hardware implementer is free to choose any reasonable // method to handle overflows. However to aid in hardware // verification they can use a specific implementation of the // WRAPLOW() macro below that is identical to their intended // hardware implementation (and also use configure options to trigger // the C-implementation of the transform). // // The particular WRAPLOW implementation below performs strict // overflow wrapping to match common hardware implementations. // bd of 8 uses trans_low with 16bits, need to remove 16bits // bd of 10 uses trans_low with 18bits, need to remove 14bits // bd of 12 uses trans_low with 20bits, need to remove 12bits // bd of x uses trans_low with 8+x bits, need to remove 24-x bits #define WRAPLOW(x, bd) ((((int32_t)(x)) << (24 - bd)) >> (24 - bd)) #else #define WRAPLOW(x, bd) (x) #endif // CONFIG_EMULATE_HARDWARE 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_highbd_idct4(const tran_low_t *input, tran_low_t *output, int bd); void vp9_highbd_idct8(const tran_low_t *input, tran_low_t *output, int bd); void vp9_highbd_idct16(const tran_low_t *input, tran_low_t *output, int bd); void vp9_highbd_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_highbd_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_highbd_idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_highbd_idct16x16_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_highbd_idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_highbd_iht4x4_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_highbd_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); void vp9_highbd_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest, int stride, int eob, int bd); static INLINE uint16_t highbd_clip_pixel_add(uint16_t dest, tran_high_t trans, int bd) { trans = WRAPLOW(trans, bd); return clip_pixel_highbd(WRAPLOW(dest + trans, bd), bd); } #endif // CONFIG_VP9_HIGHBITDEPTH #ifdef __cplusplus } // extern "C" #endif #endif // VP9_COMMON_VP9_IDCT_H_