bdc4371174
Separate the rounding and right shift operations of forward transform from those of inverse transform. Take out the assertion check from inverse transforms. If the transform coefficients were constructed to cause intermediate steps of inverse transform overflow, the codec will just let it overflow without breaking the decoding flow. Change-Id: I73cfc3706c4e840fc543a77cbc4cdb0b05d07730
107 lines
3.5 KiB
C
107 lines
3.5 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/vpx_integer.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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// 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 pair_set_epi32(a, b) \
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_mm_set_epi32(b, a, b, 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 int cospi_1_64 = 16364;
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static const int cospi_2_64 = 16305;
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static const int cospi_3_64 = 16207;
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static const int cospi_4_64 = 16069;
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static const int cospi_5_64 = 15893;
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static const int cospi_6_64 = 15679;
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static const int cospi_7_64 = 15426;
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static const int cospi_8_64 = 15137;
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static const int cospi_9_64 = 14811;
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static const int cospi_10_64 = 14449;
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static const int cospi_11_64 = 14053;
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static const int cospi_12_64 = 13623;
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static const int cospi_13_64 = 13160;
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static const int cospi_14_64 = 12665;
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static const int cospi_15_64 = 12140;
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static const int cospi_16_64 = 11585;
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static const int cospi_17_64 = 11003;
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static const int cospi_18_64 = 10394;
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static const int cospi_19_64 = 9760;
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static const int cospi_20_64 = 9102;
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static const int cospi_21_64 = 8423;
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static const int cospi_22_64 = 7723;
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static const int cospi_23_64 = 7005;
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static const int cospi_24_64 = 6270;
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static const int cospi_25_64 = 5520;
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static const int cospi_26_64 = 4756;
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static const int cospi_27_64 = 3981;
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static const int cospi_28_64 = 3196;
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static const int cospi_29_64 = 2404;
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static const int cospi_30_64 = 1606;
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static const int cospi_31_64 = 804;
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// 16384 * sqrt(2) * sin(kPi/9) * 2 / 3
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static const int sinpi_1_9 = 5283;
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static const int sinpi_2_9 = 9929;
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static const int sinpi_3_9 = 13377;
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static const int sinpi_4_9 = 15212;
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static INLINE int dct_const_round_shift(int input) {
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int rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
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return (int16_t)rv;
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}
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typedef void (*transform_1d)(const int16_t*, int16_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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void vp9_iwht4x4_add(const int16_t *input, uint8_t *dest, int stride, int eob);
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void vp9_idct4x4_add(const int16_t *input, uint8_t *dest, int stride, int eob);
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void vp9_idct8x8_add(const int16_t *input, uint8_t *dest, int stride, int eob);
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void vp9_idct16x16_add(const int16_t *input, uint8_t *dest, int stride, int
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eob);
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void vp9_idct32x32_add(const int16_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 int16_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 int16_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 int16_t *input, uint8_t *dest,
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int stride, int eob);
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#endif // VP9_COMMON_VP9_IDCT_H_
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