зеркало из https://github.com/mozilla/gecko-dev.git
213 строки
8.6 KiB
C
213 строки
8.6 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VP9_COMMON_VP9_IDCT_H_
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#define VP9_COMMON_VP9_IDCT_H_
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#include <assert.h>
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#include "./vpx_config.h"
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#include "vpx_ports/mem.h"
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#include "vp9/common/vp9_common.h"
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#include "vp9/common/vp9_enums.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Constants and Macros used by all idct/dct functions
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#define DCT_CONST_BITS 14
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#define DCT_CONST_ROUNDING (1 << (DCT_CONST_BITS - 1))
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#define UNIT_QUANT_SHIFT 2
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#define UNIT_QUANT_FACTOR (1 << UNIT_QUANT_SHIFT)
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#define pair_set_epi16(a, b) \
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_mm_set_epi16((int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a), \
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(int16_t)(b), (int16_t)(a), (int16_t)(b), (int16_t)(a))
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#define dual_set_epi16(a, b) \
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_mm_set_epi16((int16_t)(b), (int16_t)(b), (int16_t)(b), (int16_t)(b), \
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(int16_t)(a), (int16_t)(a), (int16_t)(a), (int16_t)(a))
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// Constants:
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// for (int i = 1; i< 32; ++i)
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// printf("static const int cospi_%d_64 = %.0f;\n", i,
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// round(16384 * cos(i*M_PI/64)));
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// Note: sin(k*Pi/64) = cos((32-k)*Pi/64)
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static const tran_high_t cospi_1_64 = 16364;
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static const tran_high_t cospi_2_64 = 16305;
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static const tran_high_t cospi_3_64 = 16207;
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static const tran_high_t cospi_4_64 = 16069;
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static const tran_high_t cospi_5_64 = 15893;
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static const tran_high_t cospi_6_64 = 15679;
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static const tran_high_t cospi_7_64 = 15426;
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static const tran_high_t cospi_8_64 = 15137;
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static const tran_high_t cospi_9_64 = 14811;
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static const tran_high_t cospi_10_64 = 14449;
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static const tran_high_t cospi_11_64 = 14053;
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static const tran_high_t cospi_12_64 = 13623;
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static const tran_high_t cospi_13_64 = 13160;
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static const tran_high_t cospi_14_64 = 12665;
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static const tran_high_t cospi_15_64 = 12140;
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static const tran_high_t cospi_16_64 = 11585;
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static const tran_high_t cospi_17_64 = 11003;
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static const tran_high_t cospi_18_64 = 10394;
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static const tran_high_t cospi_19_64 = 9760;
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static const tran_high_t cospi_20_64 = 9102;
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static const tran_high_t cospi_21_64 = 8423;
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static const tran_high_t cospi_22_64 = 7723;
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static const tran_high_t cospi_23_64 = 7005;
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static const tran_high_t cospi_24_64 = 6270;
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static const tran_high_t cospi_25_64 = 5520;
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static const tran_high_t cospi_26_64 = 4756;
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static const tran_high_t cospi_27_64 = 3981;
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static const tran_high_t cospi_28_64 = 3196;
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static const tran_high_t cospi_29_64 = 2404;
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static const tran_high_t cospi_30_64 = 1606;
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static const tran_high_t cospi_31_64 = 804;
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// 16384 * sqrt(2) * sin(kPi/9) * 2 / 3
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static const tran_high_t sinpi_1_9 = 5283;
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static const tran_high_t sinpi_2_9 = 9929;
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static const tran_high_t sinpi_3_9 = 13377;
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static const tran_high_t sinpi_4_9 = 15212;
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static INLINE tran_low_t check_range(tran_high_t input) {
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#if CONFIG_COEFFICIENT_RANGE_CHECKING
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// For valid VP9 input streams, intermediate stage coefficients should always
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// stay within the range of a signed 16 bit integer. Coefficients can go out
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// of this range for invalid/corrupt VP9 streams. However, strictly checking
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// this range for every intermediate coefficient can burdensome for a decoder,
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// therefore the following assertion is only enabled when configured with
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// --enable-coefficient-range-checking.
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assert(INT16_MIN <= input);
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assert(input <= INT16_MAX);
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#endif // CONFIG_COEFFICIENT_RANGE_CHECKING
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return (tran_low_t)input;
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}
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static INLINE tran_low_t dct_const_round_shift(tran_high_t input) {
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tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
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return check_range(rv);
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}
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#if CONFIG_VP9_HIGHBITDEPTH
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static INLINE tran_low_t highbd_check_range(tran_high_t input,
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int bd) {
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#if CONFIG_COEFFICIENT_RANGE_CHECKING
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// For valid highbitdepth VP9 streams, intermediate stage coefficients will
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// stay within the ranges:
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// - 8 bit: signed 16 bit integer
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// - 10 bit: signed 18 bit integer
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// - 12 bit: signed 20 bit integer
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const int32_t int_max = (1 << (7 + bd)) - 1;
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const int32_t int_min = -int_max - 1;
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assert(int_min <= input);
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assert(input <= int_max);
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(void) int_min;
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#endif // CONFIG_COEFFICIENT_RANGE_CHECKING
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(void) bd;
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return (tran_low_t)input;
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}
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static INLINE tran_low_t highbd_dct_const_round_shift(tran_high_t input,
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int bd) {
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tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
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return highbd_check_range(rv, bd);
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}
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#endif // CONFIG_VP9_HIGHBITDEPTH
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typedef void (*transform_1d)(const tran_low_t*, tran_low_t*);
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typedef struct {
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transform_1d cols, rows; // vertical and horizontal
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} transform_2d;
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#if CONFIG_VP9_HIGHBITDEPTH
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typedef void (*highbd_transform_1d)(const tran_low_t*, tran_low_t*, int bd);
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typedef struct {
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highbd_transform_1d cols, rows; // vertical and horizontal
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} highbd_transform_2d;
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#endif // CONFIG_VP9_HIGHBITDEPTH
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#if CONFIG_EMULATE_HARDWARE
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// When CONFIG_EMULATE_HARDWARE is 1 the transform performs a
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// non-normative method to handle overflows. A stream that causes
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// overflows in the inverse transform is considered invalid in VP9,
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// and a hardware implementer is free to choose any reasonable
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// method to handle overflows. However to aid in hardware
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// verification they can use a specific implementation of the
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// WRAPLOW() macro below that is identical to their intended
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// hardware implementation (and also use configure options to trigger
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// the C-implementation of the transform).
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//
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// The particular WRAPLOW implementation below performs strict
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// overflow wrapping to match common hardware implementations.
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// bd of 8 uses trans_low with 16bits, need to remove 16bits
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// bd of 10 uses trans_low with 18bits, need to remove 14bits
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// bd of 12 uses trans_low with 20bits, need to remove 12bits
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// bd of x uses trans_low with 8+x bits, need to remove 24-x bits
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#define WRAPLOW(x, bd) ((((int32_t)(x)) << (24 - bd)) >> (24 - bd))
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#else
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#define WRAPLOW(x, bd) (x)
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#endif // CONFIG_EMULATE_HARDWARE
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void vp9_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
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int eob);
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void vp9_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
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int eob);
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void vp9_idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride,
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int eob);
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void vp9_idct16x16_add(const tran_low_t *input, uint8_t *dest, int stride, int
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eob);
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void vp9_idct32x32_add(const tran_low_t *input, uint8_t *dest, int stride,
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int eob);
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void vp9_iht4x4_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest,
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int stride, int eob);
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void vp9_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest,
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int stride, int eob);
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void vp9_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input, uint8_t *dest,
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int stride, int eob);
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#if CONFIG_VP9_HIGHBITDEPTH
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void vp9_highbd_idct4(const tran_low_t *input, tran_low_t *output, int bd);
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void vp9_highbd_idct8(const tran_low_t *input, tran_low_t *output, int bd);
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void vp9_highbd_idct16(const tran_low_t *input, tran_low_t *output, int bd);
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void vp9_highbd_iwht4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
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int eob, int bd);
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void vp9_highbd_idct4x4_add(const tran_low_t *input, uint8_t *dest, int stride,
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int eob, int bd);
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void vp9_highbd_idct8x8_add(const tran_low_t *input, uint8_t *dest, int stride,
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int eob, int bd);
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void vp9_highbd_idct16x16_add(const tran_low_t *input, uint8_t *dest,
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int stride, int eob, int bd);
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void vp9_highbd_idct32x32_add(const tran_low_t *input, uint8_t *dest,
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int stride, int eob, int bd);
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void vp9_highbd_iht4x4_add(TX_TYPE tx_type, const tran_low_t *input,
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uint8_t *dest, int stride, int eob, int bd);
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void vp9_highbd_iht8x8_add(TX_TYPE tx_type, const tran_low_t *input,
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uint8_t *dest, int stride, int eob, int bd);
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void vp9_highbd_iht16x16_add(TX_TYPE tx_type, const tran_low_t *input,
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uint8_t *dest, int stride, int eob, int bd);
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static INLINE uint16_t highbd_clip_pixel_add(uint16_t dest, tran_high_t trans,
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int bd) {
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trans = WRAPLOW(trans, bd);
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return clip_pixel_highbd(WRAPLOW(dest + trans, bd), bd);
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}
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#endif // CONFIG_VP9_HIGHBITDEPTH
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP9_COMMON_VP9_IDCT_H_
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