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313 lines
12 KiB
C
313 lines
12 KiB
C
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/******************************************************************************
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*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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/**
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*******************************************************************************
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* @file
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* ih264_trans_data.c
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*
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* @brief
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* Contains definition of global variables for H264 encoder
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*
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* @author
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* Ittiam
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*
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* @remarks
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*
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*******************************************************************************
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*/
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#include "ih264_typedefs.h"
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#include "ih264_trans_data.h"
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/*****************************************************************************/
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/* Extern global definitions */
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/*****************************************************************************/
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/*
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* Since we don't have a division operation in neon
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* we will multiply by LCM of 16,6,10 and scale accordingly
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* so care that to get the actual transform you need to divide by LCM
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* LCM = 240
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*/
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const UWORD16 g_scal_coff_h264_4x4[16] ={
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15,40,40,40,
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40,24,40,24,
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15,40,40,15,
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40,24,40,24};
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const UWORD16 g_scal_coff_h264_8x8[16]=
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{
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16, 15, 20, 15,
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15, 14, 19, 14,
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20, 19, 25, 19,
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15, 14, 19, 14
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};
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/*
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* The scaling is by an 8x8 matrix, but due its 4x4 symmetry we can use
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* a 4x4 matrix for scaling
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* now since divide is to be avoided, we will compute 1/ values and scale it up
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* to preserve information since our data is max 10 bit +1 sign bit we can shift a maximum of 21 bits up
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* hence multiply the matrix as such
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{16.000 15.059 20.227 15.059
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15.059 14.173 19.051 14.173
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20.227 19.051 25.600 19.051
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15.059 14.173 19.051 14.173};
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{512, 544, 405, 544,
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544, 578, 430, 578,
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405, 430, 320, 430,
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544, 578, 430, 578};*/
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/**
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******************************************************************************
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* @brief Scale Table for quantizing 4x4 subblock. To quantize a given 4x4 DCT
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* transformed block, the coefficient at index location (i,j) is scaled by one of
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* the constants in this table and right shift the result by (QP_BITS_h264_4x4 +
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* floor(qp/6)), here qp is the quantization parameter used to quantize the mb.
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*
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* input : qp%6, index location (i,j)
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* output : scale constant.
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*
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* @remarks 16 constants for each index position of the subblock and 6 for each
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* qp%6 in the range 0-5 inclusive.
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******************************************************************************
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*/
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const UWORD16 gu2_quant_scale_matrix_4x4[96] =
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{
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13107, 8066, 13107, 8066,
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8066, 5243, 8066, 5243,
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13107, 8066, 13107, 8066,
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8066, 5243, 8066, 5243,
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11916, 7490, 11916, 7490,
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7490, 4660, 7490, 4660,
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11916, 7490, 11916, 7490,
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7490, 4660, 7490, 4660,
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10082, 6554, 10082, 6554,
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6554, 4194, 6554, 4194,
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10082, 6554, 10082, 6554,
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6554, 4194, 6554, 4194,
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9362, 5825, 9362, 5825,
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5825, 3647, 5825, 3647,
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9362, 5825, 9362, 5825,
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5825, 3647, 5825, 3647,
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8192, 5243, 8192, 5243,
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5243, 3355, 5243, 3355,
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8192, 5243, 8192, 5243,
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5243, 3355, 5243, 3355,
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7282, 4559, 7282, 4559,
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4559, 2893, 4559, 2893,
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7282, 4559, 7282, 4559,
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4559, 2893, 4559, 2893,
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};
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/**
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******************************************************************************
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* @brief Round Factor for quantizing subblock. While quantizing a given 4x4 DCT
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* transformed block, the coefficient at index location (i,j) is scaled by one of
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* the constants in the table gu2_forward_quant_scalar_4x4 and then right shift
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* the result by (QP_BITS_h264_4x4 + floor(qp/6)).
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* Before right shifting a round factor is added.
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* The round factor can be any value [a * (1 << (QP_BITS_h264_4x4 + floor(qp/6)))]
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* for 'a' lies in the range 0-0.5.
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* Here qp is the quantization parameter used to quantize the mb.
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*
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* input : qp/6
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* output : round factor.
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*
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* @remarks The round factor is constructed by setting a = 1/3
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*
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* round factor constructed by setting a = 1/3
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{
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10922, 21845, 43690, 87381,
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174762, 349525, 699050, 1398101,
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2796202,
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}
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*
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* round factor constructed by setting a = 0.49
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*{
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16056, 32112, 64225,
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128450, 256901, 513802,
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1027604, 2055208, 4110417,
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};
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* round factor constructed by setting a = 0.5
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16384, 32768, 65536,
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131072, 262144, 524288,
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1048576, 2097152, 4194304,
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******************************************************************************
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*/
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const UWORD32 gu4_forward_quant_round_factor_4x4[9] =
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{
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10922, 21845, 43690, 87381,
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174762, 349525, 699050, 1398101,
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2796202,
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};
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/**
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******************************************************************************
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* @brief Threshold Table. Quantizing the given DCT coefficient is done only if
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* it exceeds the threshold value presented in this table.
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*
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* input : qp/6, qp%6, index location (i,j)
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* output : Threshold constant.
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*
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* @remarks 16 constants for each index position of the subblock and 6 for each
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* qp%6 in the range 0-5 inclusive and 9 for each qp/6 in the range 0-51.
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******************************************************************************
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*/
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const UWORD16 gu2_forward_quant_threshold_4x4[96] =
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{
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426, 693, 426, 693,
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693, 1066, 693, 1066,
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426, 693, 426, 693,
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693, 1066, 693, 1066,
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469, 746, 469, 746,
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746, 1200, 746, 1200,
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469, 746, 469, 746,
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746, 1200, 746, 1200,
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554, 853, 554, 853,
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853, 1333, 853, 1333,
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554, 853, 554, 853,
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853, 1333, 853, 1333,
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597, 960, 597, 960,
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960, 1533, 960, 1533,
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597, 960, 597, 960,
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960, 1533, 960, 1533,
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682, 1066, 682, 1066,
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1066, 1666, 1066, 1666,
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682, 1066, 682, 1066,
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1066, 1666, 1066, 1666,
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767, 1226, 767, 1226,
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1226, 1933, 1226, 1933,
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767, 1226, 767, 1226,
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1226, 1933, 1226, 1933,
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};
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/**
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******************************************************************************
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* @brief Scale Table for quantizing 8x8 subblock. To quantize a given 8x8 DCT
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* transformed block, the coefficient at index location (i,j) is scaled by one of
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* the constants in this table and right shift the result by (QP_BITS_h264_8x8 +
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* floor(qp/6)), here qp is the quantization parameter used to quantize the mb.
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*
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* input : qp%6, index location (i,j)
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* output : scale constant.
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*
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* @remarks 64 constants for each index position of the subblock and 6 for each
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* qp%6 in the range 0-5 inclusive.
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******************************************************************************
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*/
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const UWORD16 gu2_quant_scale_matrix_8x8 [384] =
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{
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13107, 12222, 16777, 12222, 13107, 12222, 16777, 12222,
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12222, 11428, 15481, 11428, 12222, 11428, 15481, 11428,
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16777, 15481, 20972, 15481, 16777, 15481, 20972, 15481,
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12222, 11428, 15481, 11428, 12222, 11428, 15481, 11428,
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13107, 12222, 16777, 12222, 13107, 12222, 16777, 12222,
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12222, 11428, 15481, 11428, 12222, 11428, 15481, 11428,
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16777, 15481, 20972, 15481, 16777, 15481, 20972, 15481,
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12222, 11428, 15481, 11428, 12222, 11428, 15481, 11428,
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11916, 11058, 14980, 11058, 11916, 11058, 14980, 11058,
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11058, 10826, 14290, 10826, 11058, 10826, 14290, 10826,
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14980, 14290, 19174, 14290, 14980, 14290, 19174, 14290,
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11058, 10826, 14290, 10826, 11058, 10826, 14290, 10826,
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11916, 11058, 14980, 11058, 11916, 11058, 14980, 11058,
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11058, 10826, 14290, 10826, 11058, 10826, 14290, 10826,
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14980, 14290, 19174, 14290, 14980, 14290, 19174, 14290,
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11058, 10826, 14290, 10826, 11058, 10826, 14290, 10826,
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10082, 9675, 12710, 9675, 10082, 9675, 12710, 9675,
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9675, 8943, 11985, 8943, 9675, 8943, 11985, 8943,
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12710, 11985, 15978, 11985, 12710, 11985, 15978, 11985,
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9675, 8943, 11985, 8943, 9675, 8943, 11985, 8943,
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10082, 9675, 12710, 9675, 10082, 9675, 12710, 9675,
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9675, 8943, 11985, 8943, 9675, 8943, 11985, 8943,
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12710, 11985, 15978, 11985, 12710, 11985, 15978, 11985,
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9675, 8943, 11985, 8943, 9675, 8943, 11985, 8943,
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9362, 8931, 11984, 8931, 9362, 8931, 11984, 8931,
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8931, 8228, 11259, 8228, 8931, 8228, 11259, 8228,
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11984, 11259, 14913, 11259, 11984, 11259, 14913, 11259,
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8931, 8228, 11259, 8228, 8931, 8228, 11259, 8228,
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9362, 8931, 11984, 8931, 9362, 8931, 11984, 8931,
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8931, 8228, 11259, 8228, 8931, 8228, 11259, 8228,
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11984, 11259, 14913, 11259, 11984, 11259, 14913, 11259,
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8931, 8228, 11259, 8228, 8931, 8228, 11259, 8228,
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8192, 7740, 10486, 7740, 8192, 7740, 10486, 7740,
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7740, 7346, 9777, 7346, 7740, 7346, 9777, 7346,
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10486, 9777, 13159, 9777, 10486, 9777, 13159, 9777,
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7740, 7346, 9777, 7346, 7740, 7346, 9777, 7346,
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8192, 7740, 10486, 7740, 8192, 7740, 10486, 7740,
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7740, 7346, 9777, 7346, 7740, 7346, 9777, 7346,
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10486, 9777, 13159, 9777, 10486, 9777, 13159, 9777,
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7740, 7346, 9777, 7346, 7740, 7346, 9777, 7346,
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7282, 6830, 9118, 6830, 7282, 6830, 9118, 6830,
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6830, 6428, 8640, 6428, 6830, 6428, 8640, 6428,
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9118, 8640, 11570, 8640, 9118, 8640, 11570, 8640,
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6830, 6428, 8640, 6428, 6830, 6428, 8640, 6428,
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7282, 6830, 9118, 6830, 7282, 6830, 9118, 6830,
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6830, 6428, 8640, 6428, 6830, 6428, 8640, 6428,
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9118, 8640, 11570, 8640, 9118, 8640, 11570, 8640,
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6830, 6428, 8640, 6428, 6830, 6428, 8640, 6428,
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};
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/**
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******************************************************************************
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* @brief Specification of QPc as a function of qPi
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*
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* input : qp luma
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* output : qp chroma.
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*
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* @remarks Refer Table 8-15 of h264 specification.
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******************************************************************************
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*/
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const UWORD8 gu1_qpc_fqpi[52] =
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{
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0, 1, 2, 3, 4, 5, 6, 7,
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8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23,
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24, 25, 26, 27, 28, 29, 29, 30,
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31, 32, 32, 33, 34, 34, 35, 35,
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36, 36, 37, 37, 37, 38, 38, 38,
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39, 39, 39, 39,
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};
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