| /****************************************************************************** |
| * |
| * 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 = 0.625 if QPh = 0 |
| * 2) QPm = 224 if QPh = 51, |
| * |
| * we will have |
| * a = 0.0063, b = 0.6187 |
| * |
| * 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] = |
| * |
| * 0.625 0.70077 0.78581 0.88127 0.98843 1.10870 |
| * 1.24370 1.39523 1.56533 1.75625 1.97055 2.21110 |
| * 2.48110 2.78417 3.12435 3.50620 3.93480 4.41589 |
| * 4.95590 5.56204 6.24241 7.00609 7.86330 8.82548 |
| * 9.90550 11.11778 12.47851 14.00588 15.72030 17.64467 |
| * 19.80470 22.22925 24.95072 28.00547 31.43430 35.28304 |
| * 39.60310 44.45221 49.89514 56.00463 62.86230 70.55978 |
| * 79.19990 88.89811 99.78398 112.00296 125.71830 141.11325 |
| * 158.39350 177.78992 199.56167 223.99963 |
| * |
| * |
| * |
| * Unrounded values for gau1_mpeg2_to_h264_qmap[MPEG2_QP_ELEM] |
| * |
| * 0 4.1014 10.1288 13.6477 16.1425 18.0768 19.6568 |
| * 20.9925 22.1493 23.1696 24.0822 24.9078 25.6614 26.3546 |
| * 26.9964 27.5938 28.1527 28.6777 29.1726 29.6408 30.0850 |
| * 30.5074 30.9102 31.2951 31.6636 32.0171 32.3567 32.6834 |
| * 32.9983 33.3021 33.5957 33.8795 34.1544 34.4208 34.6793 |
| * 34.9303 35.1742 35.4114 35.6423 35.8671 36.0863 36.3001 |
| * 36.5087 36.7124 36.9115 37.1060 37.2963 37.4825 37.6648 |
| * 37.8433 38.0182 38.1896 38.3577 38.5226 38.6844 38.8433 |
| * 38.9993 39.1525 39.3031 39.4511 39.5966 39.7397 39.8804 |
| * 40.0189 40.1553 40.2895 40.4217 40.5518 40.6801 40.8065 |
| * 40.9310 41.0538 41.1749 41.2943 41.4121 41.5283 41.6430 |
| * 41.7561 41.8678 41.9781 42.0870 42.1946 42.3008 42.4057 |
| * 42.5094 42.6118 42.7131 42.8132 42.9121 43.0099 43.1066 |
| * 43.2023 43.2969 43.3905 43.4831 43.5747 43.6653 43.7550 |
| * 43.8438 43.9317 44.0187 44.1049 44.1901 44.2746 44.3582 |
| * 44.4411 44.5231 44.6044 44.6849 44.7647 44.8438 44.9221 |
| * 44.9998 45.0767 45.1530 45.2286 45.3035 45.3779 45.4515 |
| * 45.5246 45.5970 45.6689 45.7401 45.8108 45.8809 45.9504 |
| * 46.0194 46.0878 46.1557 46.2231 46.2899 46.3563 46.4221 |
| * 46.4874 46.5523 46.6166 46.6805 46.7439 46.8069 46.8694 |
| * 46.9314 46.9930 47.0542 47.1150 47.1753 47.2352 47.2947 |
| * 47.3538 47.4125 47.4708 47.5287 47.5862 47.6433 47.7001 |
| * 47.7565 47.8125 47.8682 47.9235 47.9785 48.0331 48.0874 |
| * 48.1413 48.1949 48.2482 48.3011 48.3537 48.4060 48.4580 |
| * 48.5097 48.5611 48.6122 48.6629 48.7134 48.7636 48.8135 |
| * 48.8631 48.9124 48.9615 49.0102 49.0587 49.1069 49.1549 |
| * 49.2026 49.2500 49.2972 49.3441 49.3908 49.4372 49.4834 |
| * 49.5293 49.5750 49.6204 49.6656 49.7106 49.7553 49.7998 |
| * 49.8441 49.8882 49.9320 49.9756 50.0190 50.0622 50.1051 |
| * 50.1479 50.1904 50.2327 50.2749 50.3168 50.3585 50.4000 |
| * 50.4413 50.4825 50.5234 50.5641 50.6047 50.6450 50.6852 |
| * 50.7252 50.7650 50.8046 50.8440 50.8833 50.9224 50.9613 |
| * 51.0000 |
| */ |
| |
| const UWORD8 gau1_h264_to_mpeg2_qmap[H264_QP_ELEM] = |
| { |
| 1, 1, 1, 1, 1, 1, 1, 1, |
| 2, 2, 2, 2, 2, 3, 3, 4, |
| 4, 4, 5, 6, 6, 7, 8, 9, |
| 10, 11, 12, 14, 16, 18, 20, 22, |
| 25, 28, 31, 35, 40, 44, 50, 56, |
| 63, 71, 79, 89, 100, 112, 126, 141, |
| 158, 178, 200, 224 |
| }; |
| |
| const UWORD8 gau1_mpeg2_to_h264_qmap[MPEG2_QP_ELEM] = |
| { |
| 0, 4, 10, 14, 16, 18, 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, 37, 37, 37, 37, 37, 37, |
| 38, 38, 38, 38, 38, 39, 39, 39, |
| 39, 39, 39, 39, 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, 46, |
| 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, 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, 51, 51, 51, 51, |
| 51, 51, 51, 51, 51, 51, 51, 51, |
| 51 |
| }; |
| |
