156 lines
6.1 KiB
C
156 lines
6.1 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 "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(b, a, b, a, b, a, b, a)
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#define dual_set_epi16(a, b) \
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_mm_set_epi16(b, b, b, b, a, a, a, 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 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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#if CONFIG_VP9_HIGHBITDEPTH
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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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#elif 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 <= rv);
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assert(rv <= INT16_MAX);
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#endif
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return (tran_low_t)rv;
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}
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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 (*high_transform_1d)(const tran_low_t*, tran_low_t*, int bd);
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typedef struct {
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high_transform_1d cols, rows; // vertical and horizontal
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} high_transform_2d;
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#endif // CONFIG_VP9_HIGHBITDEPTH
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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_high_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_high_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_high_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_high_idct16x16_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_high_idct32x32_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_high_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_high_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_high_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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#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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