/****************************************************************************** * * 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, };