Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Copyright (C) 2015 The Android Open Source Project |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at: |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | * |
| 17 | ***************************************************************************** |
| 18 | * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore |
| 19 | */ |
| 20 | /** |
| 21 | ******************************************************************************* |
| 22 | * @file |
| 23 | * ih264e_globals.c |
| 24 | * |
| 25 | * @brief |
| 26 | * Contains definitions of global variables used across the encoder |
| 27 | * |
| 28 | * @author |
| 29 | * ittiam |
| 30 | * |
| 31 | * @par List of functions |
| 32 | * |
| 33 | * |
| 34 | * @remarks |
| 35 | * |
| 36 | ******************************************************************************* |
| 37 | */ |
| 38 | |
| 39 | /*****************************************************************************/ |
| 40 | /* File Includes */ |
| 41 | /*****************************************************************************/ |
| 42 | |
| 43 | /* User include files */ |
| 44 | #include "ih264_typedefs.h" |
| 45 | #include "ih264_defs.h" |
| 46 | #include "ih264e_defs.h" |
| 47 | #include "ih264e_globals.h" |
| 48 | |
| 49 | /*****************************************************************************/ |
| 50 | /* Extern global definitions */ |
| 51 | /*****************************************************************************/ |
| 52 | |
| 53 | /** |
| 54 | ****************************************************************************** |
| 55 | * @brief lamda for varying quantizer scales that would be used to |
| 56 | * compute the RD cost while deciding on the MB modes. |
| 57 | * input : qp |
| 58 | * output : lambda |
| 59 | * @remarks lambda = 0.85 * pow(2, (qp - 12)/3), when SSD is used as metric |
| 60 | * for computing distortion (Bit rate estimation for cost function of H.264/ |
| 61 | * AVC by Mohd Golam Sarwer et. al.) If the use of distortion metric is SAD |
| 62 | * rather than SSD in the stage of encoding, consider sqrt(lambda) simply to |
| 63 | * adjust lambda for the lack of squaring operation in the error computation |
| 64 | * (from rate distortion optimization for video compression by sullivan). |
| 65 | ****************************************************************************** |
| 66 | */ |
| 67 | const UWORD16 gu2_qp_lambda[52]= |
| 68 | { |
| 69 | 0, 0, 0, 0, 0, 0, 0, 1, |
| 70 | 1, 1, 1, 1, 1, 1, 1, 1, |
| 71 | 1, 2, 2, 2, 2, 3, 3, 3, |
| 72 | 4, 4, 5, 5, 6, 7, 7, 8, |
| 73 | 9, 10, 12, 13, 15, 17, 19, 21, |
| 74 | 23, 26, 30, 33, 37, 42, 47, 53, |
| 75 | 59, 66, 74, 83, |
| 76 | }; |
| 77 | |
| 78 | /** |
| 79 | ****************************************************************************** |
| 80 | * @brief Lamda for varying quantizer scales that would be used to |
| 81 | * compute the RD cost while deciding on the MB modes. |
| 82 | * input : qp |
| 83 | * output : lambda |
| 84 | * @remarks lambda = pow(2, (qp - 12)/6) |
| 85 | ****************************************************************************** |
| 86 | */ |
| 87 | const UWORD8 gu1_qp0[52]= |
| 88 | { |
| 89 | 0, 0, 0, 0, 0, 0, 0, 0, |
| 90 | 0, 0, 0, 0, 1, 1, 1, 1, |
| 91 | 2, 2, 2, 2, 3, 3, 3, 4, |
| 92 | 4, 4, 5, 6, 6, 7, 8, 9, |
| 93 | 10, 11, 13, 14, 16, 18, 20, 23, |
| 94 | 25, 29, 32, 36, 40, 45, 51, 57, |
| 95 | 64, 72, 81, 91, |
| 96 | }; |
| 97 | |
| 98 | /** |
| 99 | ****************************************************************************** |
| 100 | * @brief unsigned exp. goulumb codelengths to assign cost to a coefficient of |
| 101 | * mb types. |
| 102 | * input : Integer |
| 103 | * output : codelength |
| 104 | * @remarks Refer sec. 9-1 in h264 specification |
| 105 | ****************************************************************************** |
| 106 | */ |
| 107 | const UWORD8 u1_uev_codelength[32] = |
| 108 | { |
| 109 | 1, 3, 3, 5, 5, 5, 5, 7, |
| 110 | 7, 7, 7, 7, 7, 7, 7, 9, |
| 111 | 9, 9, 9, 9, 9, 9, 9, 9, |
| 112 | 9, 9, 9, 9, 9, 9, 9, 11, |
| 113 | }; |
| 114 | |
| 115 | |
| 116 | /** |
| 117 | ****************************************************************************** |
| 118 | * @brief Look up table to assign cost to a coefficient of a residual block |
| 119 | * basing on its surrounding coefficients |
| 120 | * input : Numbers of T1's |
| 121 | * output : coeff_cost |
| 122 | * @remarks Refer Section 2.3 Elimination of single coefficients in inter |
| 123 | * macroblocks in document JVT-O079 |
| 124 | ****************************************************************************** |
| 125 | */ |
| 126 | const UWORD8 gu1_coeff_cost[6] = |
| 127 | { |
| 128 | 3, 2, 2, 1, 1, 1 |
| 129 | }; |
| 130 | |
| 131 | /** |
| 132 | ****************************************************************************** |
| 133 | * @brief Indices map to raster scan for luma 4x4 block |
| 134 | * input : scan index |
| 135 | * output : scan location |
| 136 | * @remarks None |
| 137 | ****************************************************************************** |
| 138 | */ |
| 139 | const UWORD8 gu1_luma_scan_order[16] = |
| 140 | { |
| 141 | 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 |
| 142 | }; |
| 143 | |
| 144 | /** |
| 145 | ****************************************************************************** |
| 146 | * @brief Indices map to raster scan for chroma AC block |
| 147 | * input : scan index |
| 148 | * output : scan location |
| 149 | * @remarks None |
| 150 | ****************************************************************************** |
| 151 | */ |
| 152 | const UWORD8 gu1_chroma_scan_order[15] = |
| 153 | { |
| 154 | 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 |
| 155 | }; |
| 156 | |
| 157 | /** |
| 158 | ****************************************************************************** |
| 159 | * @brief Indices map to raster scan for luma 4x4 dc block |
| 160 | * input : scan index |
| 161 | * output : scan location |
| 162 | * @remarks : None |
| 163 | ****************************************************************************** |
| 164 | */ |
| 165 | const UWORD8 gu1_luma_scan_order_dc[16] = |
| 166 | { |
| 167 | 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 |
| 168 | }; |
| 169 | |
| 170 | /** |
| 171 | ****************************************************************************** |
| 172 | * @brief Indices map to raster scan for chroma 2x2 dc block |
| 173 | * input : scan index |
| 174 | * output : scan location |
| 175 | * @remarks None |
| 176 | ****************************************************************************** |
| 177 | */ |
| 178 | const UWORD8 gu1_chroma_scan_order_dc[4] = |
| 179 | { |
| 180 | 0, 1, 2, 3 |
| 181 | }; |
| 182 | |
| 183 | /** |
| 184 | ****************************************************************************** |
| 185 | * @brief choice of motion vectors to be used during mv prediction |
| 186 | * input : formatted reference idx comparison metric |
| 187 | * output : mv prediction has to be median or a simple straight forward selec |
| 188 | * tion from neighbors. |
| 189 | * @remarks If only one of the candidate blocks has a reference frame equal to |
| 190 | the current block then use the same block as the final predictor. A simple |
| 191 | look up table to assist this mv prediction condition |
| 192 | ****************************************************************************** |
| 193 | */ |
| 194 | const WORD8 gi1_mv_pred_condition[8] = |
| 195 | { |
| 196 | -1, 0, 1, -1, 2, -1, -1, -1 |
| 197 | }; |
| 198 | |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 199 | |
| 200 | /******************************************************************************* |
| 201 | * Translation of MPEG QP to H264 QP |
| 202 | ******************************************************************************/ |
| 203 | /* |
| 204 | * Note : RC library models QP and bits assuming the QP to be MPEG2. |
| 205 | * Since MPEG qp varies linearly, when the relationship is computed, |
| 206 | * it learns that delta(qp) => delta(bits). Now what we are doing by the |
| 207 | * transation of qp is that |
| 208 | * QPrc = a + b*2^(QPen) |
| 209 | * By not considering the weight matrix in both MPEG and H264 we in effect |
| 210 | * only changing the relation to |
| 211 | * QPrc = c + d*2^(QPen) |
| 212 | * This will only entatil changin the RC model parameters, and this will |
| 213 | * not affect rc relation at all |
| 214 | * |
| 215 | * |
| 216 | * We have MPEG qp which varies from 0-228. The quantization factor has a linear |
| 217 | * relation ship with the size of quantized values |
| 218 | * |
| 219 | * We also have H264 Qp, which varies such that for a change in QP of 6 , we |
| 220 | * double the corresponding scaling factor. Hence the scaling is linear in terms |
| 221 | * of 2^(QPh/6) |
| 222 | * |
| 223 | * Now we want to have translation between QPm and QPh. Hence we can write |
| 224 | * |
| 225 | * QPm = a + b*2^(QPh/6) |
| 226 | * |
| 227 | * Appling boundary condition that |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 228 | * 1) QPm = 0.625 if QPh = 0 |
| 229 | * 2) QPm = 224 if QPh = 51, |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 230 | * |
| 231 | * we will have |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 232 | * a = 0.0063, b = 0.6187 |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 233 | * |
| 234 | * Hence the relatiohship is |
| 235 | * QPm = a + b*2^(Qph/6) |
| 236 | * QPh = 6*log((Qpm - a)/b) |
| 237 | * |
| 238 | * |
| 239 | * Unrounded values for gau1_h264_to_mpeg2_qmap[H264_QP_ELEM] = |
| 240 | * |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 241 | * 0.625 0.70077 0.78581 0.88127 0.98843 1.10870 |
| 242 | * 1.24370 1.39523 1.56533 1.75625 1.97055 2.21110 |
| 243 | * 2.48110 2.78417 3.12435 3.50620 3.93480 4.41589 |
| 244 | * 4.95590 5.56204 6.24241 7.00609 7.86330 8.82548 |
| 245 | * 9.90550 11.11778 12.47851 14.00588 15.72030 17.64467 |
| 246 | * 19.80470 22.22925 24.95072 28.00547 31.43430 35.28304 |
| 247 | * 39.60310 44.45221 49.89514 56.00463 62.86230 70.55978 |
| 248 | * 79.19990 88.89811 99.78398 112.00296 125.71830 141.11325 |
| 249 | * 158.39350 177.78992 199.56167 223.99963 |
| 250 | * |
| 251 | * |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 252 | * |
| 253 | * Unrounded values for gau1_mpeg2_to_h264_qmap[MPEG2_QP_ELEM] |
| 254 | * |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 255 | * 0 4.1014 10.1288 13.6477 16.1425 18.0768 19.6568 |
| 256 | * 20.9925 22.1493 23.1696 24.0822 24.9078 25.6614 26.3546 |
| 257 | * 26.9964 27.5938 28.1527 28.6777 29.1726 29.6408 30.0850 |
| 258 | * 30.5074 30.9102 31.2951 31.6636 32.0171 32.3567 32.6834 |
| 259 | * 32.9983 33.3021 33.5957 33.8795 34.1544 34.4208 34.6793 |
| 260 | * 34.9303 35.1742 35.4114 35.6423 35.8671 36.0863 36.3001 |
| 261 | * 36.5087 36.7124 36.9115 37.1060 37.2963 37.4825 37.6648 |
| 262 | * 37.8433 38.0182 38.1896 38.3577 38.5226 38.6844 38.8433 |
| 263 | * 38.9993 39.1525 39.3031 39.4511 39.5966 39.7397 39.8804 |
| 264 | * 40.0189 40.1553 40.2895 40.4217 40.5518 40.6801 40.8065 |
| 265 | * 40.9310 41.0538 41.1749 41.2943 41.4121 41.5283 41.6430 |
| 266 | * 41.7561 41.8678 41.9781 42.0870 42.1946 42.3008 42.4057 |
| 267 | * 42.5094 42.6118 42.7131 42.8132 42.9121 43.0099 43.1066 |
| 268 | * 43.2023 43.2969 43.3905 43.4831 43.5747 43.6653 43.7550 |
| 269 | * 43.8438 43.9317 44.0187 44.1049 44.1901 44.2746 44.3582 |
| 270 | * 44.4411 44.5231 44.6044 44.6849 44.7647 44.8438 44.9221 |
| 271 | * 44.9998 45.0767 45.1530 45.2286 45.3035 45.3779 45.4515 |
| 272 | * 45.5246 45.5970 45.6689 45.7401 45.8108 45.8809 45.9504 |
| 273 | * 46.0194 46.0878 46.1557 46.2231 46.2899 46.3563 46.4221 |
| 274 | * 46.4874 46.5523 46.6166 46.6805 46.7439 46.8069 46.8694 |
| 275 | * 46.9314 46.9930 47.0542 47.1150 47.1753 47.2352 47.2947 |
| 276 | * 47.3538 47.4125 47.4708 47.5287 47.5862 47.6433 47.7001 |
| 277 | * 47.7565 47.8125 47.8682 47.9235 47.9785 48.0331 48.0874 |
| 278 | * 48.1413 48.1949 48.2482 48.3011 48.3537 48.4060 48.4580 |
| 279 | * 48.5097 48.5611 48.6122 48.6629 48.7134 48.7636 48.8135 |
| 280 | * 48.8631 48.9124 48.9615 49.0102 49.0587 49.1069 49.1549 |
| 281 | * 49.2026 49.2500 49.2972 49.3441 49.3908 49.4372 49.4834 |
| 282 | * 49.5293 49.5750 49.6204 49.6656 49.7106 49.7553 49.7998 |
| 283 | * 49.8441 49.8882 49.9320 49.9756 50.0190 50.0622 50.1051 |
| 284 | * 50.1479 50.1904 50.2327 50.2749 50.3168 50.3585 50.4000 |
| 285 | * 50.4413 50.4825 50.5234 50.5641 50.6047 50.6450 50.6852 |
| 286 | * 50.7252 50.7650 50.8046 50.8440 50.8833 50.9224 50.9613 |
| 287 | * 51.0000 |
Harinarayanan K K | 134291e | 2015-06-18 16:03:38 +0530 | [diff] [blame] | 288 | */ |
| 289 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 290 | const UWORD8 gau1_h264_to_mpeg2_qmap[H264_QP_ELEM] = |
| 291 | { |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 292 | 1, 1, 1, 1, 1, 1, 1, 1, |
| 293 | 2, 2, 2, 2, 2, 3, 3, 4, |
| 294 | 4, 4, 5, 6, 6, 7, 8, 9, |
| 295 | 10, 11, 12, 14, 16, 18, 20, 22, |
| 296 | 25, 28, 31, 35, 40, 44, 50, 56, |
| 297 | 63, 71, 79, 89, 100, 112, 126, 141, |
| 298 | 158, 178, 200, 224 |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 299 | }; |
| 300 | |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 301 | const UWORD8 gau1_mpeg2_to_h264_qmap[MPEG2_QP_ELEM] = |
| 302 | { |
Harinarayanan K K | 461adb9 | 2015-06-22 13:48:03 +0530 | [diff] [blame] | 303 | 0, 4, 10, 14, 16, 18, 20, 21, |
| 304 | 22, 23, 24, 25, 26, 26, 27, 28, |
| 305 | 28, 29, 29, 30, 30, 31, 31, 31, |
| 306 | 32, 32, 32, 33, 33, 33, 34, 34, |
| 307 | 34, 34, 35, 35, 35, 35, 36, 36, |
| 308 | 36, 36, 37, 37, 37, 37, 37, 37, |
| 309 | 38, 38, 38, 38, 38, 39, 39, 39, |
| 310 | 39, 39, 39, 39, 40, 40, 40, 40, |
| 311 | 40, 40, 40, 41, 41, 41, 41, 41, |
| 312 | 41, 41, 41, 42, 42, 42, 42, 42, |
| 313 | 42, 42, 42, 42, 43, 43, 43, 43, |
| 314 | 43, 43, 43, 43, 43, 43, 43, 44, |
| 315 | 44, 44, 44, 44, 44, 44, 44, 44, |
| 316 | 44, 44, 45, 45, 45, 45, 45, 45, |
| 317 | 45, 45, 45, 45, 45, 45, 45, 46, |
| 318 | 46, 46, 46, 46, 46, 46, 46, 46, |
| 319 | 46, 46, 46, 46, 46, 46, 47, 47, |
| 320 | 47, 47, 47, 47, 47, 47, 47, 47, |
| 321 | 47, 47, 47, 47, 47, 47, 48, 48, |
| 322 | 48, 48, 48, 48, 48, 48, 48, 48, |
| 323 | 48, 48, 48, 48, 48, 48, 48, 48, |
| 324 | 49, 49, 49, 49, 49, 49, 49, 49, |
| 325 | 49, 49, 49, 49, 49, 49, 49, 49, |
| 326 | 49, 49, 49, 49, 49, 50, 50, 50, |
| 327 | 50, 50, 50, 50, 50, 50, 50, 50, |
| 328 | 50, 50, 50, 50, 50, 50, 50, 50, |
| 329 | 50, 50, 50, 50, 51, 51, 51, 51, |
| 330 | 51, 51, 51, 51, 51, 51, 51, 51, |
| 331 | 51 |
Hamsalekha S | 8d3d303 | 2015-03-13 21:24:58 +0530 | [diff] [blame] | 332 | }; |
| 333 | |