| /****************************************************************************** |
| * |
| * 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 |
| * ih264e_globals.c |
| * |
| * @brief |
| * Contains definitions of global variables used across the encoder |
| * |
| * @author |
| * ittiam |
| * |
| * @par List of functions |
| * |
| * |
| * @remarks |
| * |
| ******************************************************************************* |
| */ |
| |
| /*****************************************************************************/ |
| /* File Includes */ |
| /*****************************************************************************/ |
| |
| /* User include files */ |
| #include "ih264_typedefs.h" |
| #include "ih264_defs.h" |
| #include "ih264e_defs.h" |
| #include "ih264e_globals.h" |
| |
| /*****************************************************************************/ |
| /* Extern global definitions */ |
| /*****************************************************************************/ |
| |
| /** |
| ****************************************************************************** |
| * @brief lamda for varying quantizer scales that would be used to |
| * compute the RD cost while deciding on the MB modes. |
| * input : qp |
| * output : lambda |
| * @remarks lambda = 0.85 * pow(2, (qp - 12)/3), when SSD is used as metric |
| * for computing distortion (Bit rate estimation for cost function of H.264/ |
| * AVC by Mohd Golam Sarwer et. al.) If the use of distortion metric is SAD |
| * rather than SSD in the stage of encoding, consider sqrt(lambda) simply to |
| * adjust lambda for the lack of squaring operation in the error computation |
| * (from rate distortion optimization for video compression by sullivan). |
| ****************************************************************************** |
| */ |
| const UWORD16 gu2_qp_lambda[52]= |
| { |
| 0, 0, 0, 0, 0, 0, 0, 1, |
| 1, 1, 1, 1, 1, 1, 1, 1, |
| 1, 2, 2, 2, 2, 3, 3, 3, |
| 4, 4, 5, 5, 6, 7, 7, 8, |
| 9, 10, 12, 13, 15, 17, 19, 21, |
| 23, 26, 30, 33, 37, 42, 47, 53, |
| 59, 66, 74, 83, |
| }; |
| |
| /** |
| ****************************************************************************** |
| * @brief Lamda for varying quantizer scales that would be used to |
| * compute the RD cost while deciding on the MB modes. |
| * input : qp |
| * output : lambda |
| * @remarks lambda = pow(2, (qp - 12)/6) |
| ****************************************************************************** |
| */ |
| const UWORD8 gu1_qp0[52]= |
| { |
| 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 1, 1, 1, 1, |
| 2, 2, 2, 2, 3, 3, 3, 4, |
| 4, 4, 5, 6, 6, 7, 8, 9, |
| 10, 11, 13, 14, 16, 18, 20, 23, |
| 25, 29, 32, 36, 40, 45, 51, 57, |
| 64, 72, 81, 91, |
| }; |
| |
| /** |
| ****************************************************************************** |
| * @brief unsigned exp. goulumb codelengths to assign cost to a coefficient of |
| * mb types. |
| * input : Integer |
| * output : codelength |
| * @remarks Refer sec. 9-1 in h264 specification |
| ****************************************************************************** |
| */ |
| const UWORD8 u1_uev_codelength[32] = |
| { |
| 1, 3, 3, 5, 5, 5, 5, 7, |
| 7, 7, 7, 7, 7, 7, 7, 9, |
| 9, 9, 9, 9, 9, 9, 9, 9, |
| 9, 9, 9, 9, 9, 9, 9, 11, |
| }; |
| |
| |
| /** |
| ****************************************************************************** |
| * @brief Look up table to assign cost to a coefficient of a residual block |
| * basing on its surrounding coefficients |
| * input : Numbers of T1's |
| * output : coeff_cost |
| * @remarks Refer Section 2.3 Elimination of single coefficients in inter |
| * macroblocks in document JVT-O079 |
| ****************************************************************************** |
| */ |
| const UWORD8 gu1_coeff_cost[6] = |
| { |
| 3, 2, 2, 1, 1, 1 |
| }; |
| |
| /** |
| ****************************************************************************** |
| * @brief Indices map to raster scan for luma 4x4 block |
| * input : scan index |
| * output : scan location |
| * @remarks None |
| ****************************************************************************** |
| */ |
| const UWORD8 gu1_luma_scan_order[16] = |
| { |
| 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 |
| }; |
| |
| /** |
| ****************************************************************************** |
| * @brief Indices map to raster scan for chroma AC block |
| * input : scan index |
| * output : scan location |
| * @remarks None |
| ****************************************************************************** |
| */ |
| const UWORD8 gu1_chroma_scan_order[15] = |
| { |
| 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 |
| }; |
| |
| /** |
| ****************************************************************************** |
| * @brief Indices map to raster scan for luma 4x4 dc block |
| * input : scan index |
| * output : scan location |
| * @remarks : None |
| ****************************************************************************** |
| */ |
| const UWORD8 gu1_luma_scan_order_dc[16] = |
| { |
| 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 |
| }; |
| |
| /** |
| ****************************************************************************** |
| * @brief Indices map to raster scan for chroma 2x2 dc block |
| * input : scan index |
| * output : scan location |
| * @remarks None |
| ****************************************************************************** |
| */ |
| const UWORD8 gu1_chroma_scan_order_dc[4] = |
| { |
| 0, 1, 2, 3 |
| }; |
| |
| /** |
| ****************************************************************************** |
| * @brief choice of motion vectors to be used during mv prediction |
| * input : formatted reference idx comparison metric |
| * output : mv prediction has to be median or a simple straight forward selec |
| * tion from neighbors. |
| * @remarks If only one of the candidate blocks has a reference frame equal to |
| the current block then use the same block as the final predictor. A simple |
| look up table to assist this mv prediction condition |
| ****************************************************************************** |
| */ |
| const WORD8 gi1_mv_pred_condition[8] = |
| { |
| -1, 0, 1, -1, 2, -1, -1, -1 |
| }; |
| |
| |
| /******************************************************************************* |
| * Translation of MPEG QP to H264 QP |
| ******************************************************************************/ |
| /* |
| * Note : RC library models QP and bits assuming the QP to be MPEG2. |
| * Since MPEG qp varies linearly, when the relationship is computed, |
| * it learns that delta(qp) => delta(bits). Now what we are doing by the |
| * transation of qp is that |
| * QPrc = a + b*2^(QPen) |
| * By not considering the weight matrix in both MPEG and H264 we in effect |
| * only changing the relation to |
| * QPrc = c + d*2^(QPen) |
| * This will only entatil changin the RC model parameters, and this will |
| * not affect rc relation at all |
| * |
| * |
| * We have MPEG qp which varies from 0-228. The quantization factor has a linear |
| * relation ship with the size of quantized values |
| * |
| * We also have H264 Qp, which varies such that for a change in QP of 6 , we |
| * double the corresponding scaling factor. Hence the scaling is linear in terms |
| * of 2^(QPh/6) |
| * |
| * Now we want to have translation between QPm and QPh. Hence we can write |
| * |
| * QPm = a + b*2^(QPh/6) |
| * |
| * Appling boundary condition that |
| * 1) QPm = 1 if QPh = 0 |
| * 2) QPm = 228 if QPh = 51, |
| * |
| * we will have |
| * a = -0.372, b = 0.628 |
| * |
| * Hence the relatiohship is |
| * QPm = a + b*2^(Qph/6) |
| * QPh = 6*log((Qpm - a)/b) |
| * |
| * |
| * Unrounded values for gau1_h264_to_mpeg2_qmap[H264_QP_ELEM] = |
| * |
| * 0.33291 0.41923 0.51613 0.62489 0.74697 0.88400 |
| * 1.03781 1.21046 1.40425 1.62178 1.86594 2.14000 |
| * 2.44762 2.79292 3.18050 3.61555 4.10388 4.65200 |
| * 5.26725 5.95784 6.73301 7.60310 8.57975 9.67600 |
| * 10.90650 12.28769 13.83802 15.57821 17.53150 19.72400 |
| * 22.18500 24.94737 28.04804 31.52841 35.43500 39.82000 |
| * 44.74199 50.26675 56.46807 63.42882 71.24200 80.01200 |
| * 89.85599 100.90549 113.30814 127.22965 142.85601 160.39600 |
| * 180.08398 202.18299 226.98829 |
| * |
| * Unrounded values for gau1_mpeg2_to_h264_qmap[MPEG2_QP_ELEM] |
| * |
| * -4.5328 6.7647 11.5036 14.5486 16.7967 18.5797 20.0575 |
| * 21.3193 22.4204 23.3971 24.2747 25.0715 25.8010 26.4738 |
| * 27.0981 27.6804 28.2259 28.7391 29.2236 29.6824 30.1181 |
| * 30.5329 30.9287 31.3072 31.6699 32.0180 32.3526 32.6748 |
| * 32.9854 33.2852 33.5750 33.8554 34.1270 34.3904 34.6460 |
| * 34.8942 35.1355 35.3703 35.5989 35.8216 36.0387 36.2505 |
| * 36.4572 36.6591 36.8564 37.0494 37.2381 37.4228 37.6036 |
| * 37.7807 37.9543 38.1244 38.2913 38.4550 38.6157 38.7735 |
| * 38.9284 39.0806 39.2302 39.3772 39.5218 39.6640 39.8039 |
| * 39.9416 40.0771 40.2106 40.3420 40.4714 40.5990 40.7247 |
| * 40.8486 40.9707 41.0911 41.2099 41.3271 41.4427 41.5568 |
| * 41.6694 41.7806 41.8903 41.9987 42.1057 42.2115 42.3159 |
| * 42.4191 42.5211 42.6219 42.7216 42.8201 42.9175 43.0138 |
| * 43.1091 43.2033 43.2965 43.3887 43.4799 43.5702 43.6596 |
| * 43.7480 43.8356 43.9223 44.0081 44.0930 44.1772 44.2605 |
| * 44.3431 44.4248 44.5058 44.5861 44.6656 44.7444 44.8224 |
| * 44.8998 44.9765 45.0525 45.1279 45.2026 45.2766 45.3501 |
| * 45.4229 45.4951 45.5667 45.6378 45.7082 45.7781 45.8474 |
| * 45.9162 45.9844 46.0521 46.1193 46.1859 46.2521 46.3177 |
| * 46.3829 46.4475 46.5117 46.5754 46.6386 46.7014 46.7638 |
| * 46.8256 46.8871 46.9481 47.0087 47.0689 47.1286 47.1880 |
| * 47.2469 47.3054 47.3636 47.4213 47.4787 47.5357 47.5923 |
| * 47.6486 47.7045 47.7600 47.8152 47.8700 47.9245 47.9787 |
| * 48.0325 48.0859 48.1391 48.1919 48.2444 48.2966 48.3485 |
| * 48.4000 48.4513 48.5022 48.5529 48.6033 48.6533 48.7031 |
| * 48.7526 48.8018 48.8508 48.8995 48.9478 48.9960 49.0438 |
| * 49.0914 49.1388 49.1858 49.2327 49.2792 49.3256 49.3716 |
| * 49.4175 49.4630 49.5084 49.5535 49.5984 49.6430 49.6875 |
| * 49.7317 49.7756 49.8194 49.8629 49.9062 49.9493 49.9922 |
| * 50.0348 50.0773 50.1196 50.1616 50.2034 50.2451 50.2865 |
| * 50.3278 50.3688 50.4097 50.4503 50.4908 50.5311 50.5712 |
| * 50.6111 50.6508 50.6904 50.7298 50.7690 50.8080 50.8468 |
| * 50.8855 50.9240 50.9623 51.0004 51.0384 |
| * |
| */ |
| |
| const UWORD8 gau1_h264_to_mpeg2_qmap[H264_QP_ELEM] = |
| { |
| 1, 1, 1, 1, 1, 1, |
| 1, 1, 1, 2, 2, 2, |
| 2, 3, 3, 4, 4, 5, |
| 5, 6, 7, 8, 9, 10, |
| 11, 12, 14, 16, 18, 20, |
| 22, 25, 28, 32, 35, 40, |
| 45, 50, 56, 63, 71, 80, |
| 90, 101, 113, 127, 143, 160, |
| 180, 202, 227 |
| }; |
| |
| const UWORD8 gau1_mpeg2_to_h264_qmap[MPEG2_QP_ELEM] = |
| { |
| 0, 7, 12, 15, 17, 19, 20, |
| 21, 22, 23, 24, 25, 26, 26, |
| 27, 28, 28, 29, 29, 30, 30, |
| 31, 31, 31, 32, 32, 32, 33, |
| 33, 33, 34, 34, 34, 34, 35, |
| 35, 35, 35, 36, 36, 36, 36, |
| 36, 37, 37, 37, 37, 37, 38, |
| 38, 38, 38, 38, 38, 39, 39, |
| 39, 39, 39, 39, 40, 40, 40, |
| 40, 40, 40, 40, 40, 41, 41, |
| 41, 41, 41, 41, 41, 41, 42, |
| 42, 42, 42, 42, 42, 42, 42, |
| 42, 43, 43, 43, 43, 43, 43, |
| 43, 43, 43, 43, 43, 44, 44, |
| 44, 44, 44, 44, 44, 44, 44, |
| 44, 44, 45, 45, 45, 45, 45, |
| 45, 45, 45, 45, 45, 45, 45, |
| 45, 45, 46, 46, 46, 46, 46, |
| 46, 46, 46, 46, 46, 46, 46, |
| 46, 46, 47, 47, 47, 47, 47, |
| 47, 47, 47, 47, 47, 47, 47, |
| 47, 47, 47, 47, 47, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 48, 48, 48, 48, 48, |
| 48, 48, 49, 49, 49, 49, 49, |
| 49, 49, 49, 49, 49, 49, 49, |
| 49, 49, 49, 49, 49, 49, 49, |
| 49, 49, 50, 50, 50, 50, 50, |
| 50, 50, 50, 50, 50, 50, 50, |
| 50, 50, 50, 50, 50, 50, 50, |
| 50, 50, 50, 50, 50, 51, 51, |
| 51, 51, 51, 51, 51, 51, 51, |
| 51, 51, 51, 51, 51 |
| }; |
| |
