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libavc/common/ih264_trans_data.c
Ram Mohan M 0ab5c42d27 libavc: Remove duplicate code and improve readability 
This commit does not introduce any new functionality w.r.t previous
commit. But it fixes few things. They are listed below
1. Guard Bands in header files are fixed
2. Header files contains function definition comments. These are same
as in source file. Maintaining same comment at two locations is
unnecessary. These are removed.
3. Maintain Indentation consistency across the code.
4. Remove unused code
2023-10-06 16:53:23 -07:00

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