chromium/third_party/libaom/source/libaom/aom_dsp/txfm_common.h

/*
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved.
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */

#ifndef AOM_AOM_DSP_TXFM_COMMON_H_
#define AOM_AOM_DSP_TXFM_COMMON_H_

#include "aom_dsp/aom_dsp_common.h"

// Constants and Macros used by all idct/dct functions
#define DCT_CONST_BITS …
#define DCT_CONST_ROUNDING …

#define UNIT_QUANT_SHIFT …
#define UNIT_QUANT_FACTOR …

// block transform size
enum { … } UENUM1BYTE(…) …;

enum { … } UENUM1BYTE(…) …;

enum { … } UENUM1BYTE(…) …;

TxfmParam;

// Constants:
//  for (int i = 1; i< 32; ++i)
//    printf("static const int cospi_%d_64 = %.0f;\n", i,
//           round(16384 * cos(i*PI/64)));
// Note: sin(k*Pi/64) = cos((32-k)*Pi/64)
static const tran_high_t cospi_1_64 = …;
static const tran_high_t cospi_2_64 = …;
static const tran_high_t cospi_3_64 = …;
static const tran_high_t cospi_4_64 = …;
static const tran_high_t cospi_5_64 = …;
static const tran_high_t cospi_6_64 = …;
static const tran_high_t cospi_7_64 = …;
static const tran_high_t cospi_8_64 = …;
static const tran_high_t cospi_9_64 = …;
static const tran_high_t cospi_10_64 = …;
static const tran_high_t cospi_11_64 = …;
static const tran_high_t cospi_12_64 = …;
static const tran_high_t cospi_13_64 = …;
static const tran_high_t cospi_14_64 = …;
static const tran_high_t cospi_15_64 = …;
static const tran_high_t cospi_16_64 = …;
static const tran_high_t cospi_17_64 = …;
static const tran_high_t cospi_18_64 = …;
static const tran_high_t cospi_19_64 = …;
static const tran_high_t cospi_20_64 = …;
static const tran_high_t cospi_21_64 = …;
static const tran_high_t cospi_22_64 = …;
static const tran_high_t cospi_23_64 = …;
static const tran_high_t cospi_24_64 = …;
static const tran_high_t cospi_25_64 = …;
static const tran_high_t cospi_26_64 = …;
static const tran_high_t cospi_27_64 = …;
static const tran_high_t cospi_28_64 = …;
static const tran_high_t cospi_29_64 = …;
static const tran_high_t cospi_30_64 = …;
static const tran_high_t cospi_31_64 = …;

//  16384 * sqrt(2) * sin(kPi/9) * 2 / 3
static const tran_high_t sinpi_1_9 = …;
static const tran_high_t sinpi_2_9 = …;
static const tran_high_t sinpi_3_9 = …;
static const tran_high_t sinpi_4_9 = …;

// 16384 * sqrt(2)
static const tran_high_t Sqrt2 = …;
static const tran_high_t InvSqrt2 = …;

static inline tran_high_t fdct_round_shift(tran_high_t input) { … }

#endif  // AOM_AOM_DSP_TXFM_COMMON_H_