| /****************************************************************************** |
| * |
| * 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 |
| * |
| ******************************************************************************* |
| */ |
| |
| #include "ih264_typedefs.h" |
| #include "ih264_trans_data.h" |
| |
| /*****************************************************************************/ |
| /* Extern global definitions */ |
| /*****************************************************************************/ |
| |
| /* |
| * Since we don't have a division operation in neon |
| * we will multiply by LCM of 16,6,10 and scale accordingly |
| * so care that to get the actual transform you need to divide by LCM |
| * LCM = 240 |
| */ |
| |
| const UWORD16 g_scal_coff_h264_4x4[16] ={ |
| 15,40,40,40, |
| 40,24,40,24, |
| 15,40,40,15, |
| 40,24,40,24}; |
| |
| |
| |
| const UWORD16 g_scal_coff_h264_8x8[16]= |
| { |
| 16, 15, 20, 15, |
| 15, 14, 19, 14, |
| 20, 19, 25, 19, |
| 15, 14, 19, 14 |
| }; |
| /* |
| * The scaling is by an 8x8 matrix, but due its 4x4 symmetry we can use |
| * a 4x4 matrix for scaling |
| * now since divide is to be avoided, we will compute 1/ values and scale it up |
| * to preserve information since our data is max 10 bit +1 sign bit we can shift a maximum of 21 bits up |
| * hence multiply the matrix as such |
| {16.000 15.059 20.227 15.059 |
| 15.059 14.173 19.051 14.173 |
| 20.227 19.051 25.600 19.051 |
| 15.059 14.173 19.051 14.173}; |
| {512, 544, 405, 544, |
| 544, 578, 430, 578, |
| 405, 430, 320, 430, |
| 544, 578, 430, 578};*/ |
| |
| |
| /** |
| ****************************************************************************** |
| * @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, |
| }; |
