diff --git a/encoder/ih264e_globals.c b/encoder/ih264e_globals.c index fdc6837c..94997829 100644 --- a/encoder/ih264e_globals.c +++ b/encoder/ih264e_globals.c @@ -213,132 +213,57 @@ 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 entail changing 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 - */ +/** +****************************************************************************** +* @brief Translation of Qstep <-> QP +* Qstep(QP) = Qstep(QP%6) * (2 ^ floor(QP/6)) +* Qstep(QP, n = 0) {0.625, 0.6875, 0.8125, 0.875, 1.0, 1.125} for QP[0-5] +* @remarks QPRange[0-51] & QstepRange[1 - 224]. +****************************************************************************** +*/ 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 + 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, 11, 13, 14, 16, 18, 20, 22, + 26, 28, 32, 36, 40, 44, 52, 56, + 64, 72, 80, 88, 104, 112, 128, 144, + 160, 176, 208, 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 + 0, 4, 10, 13, 16, 18, 19, 21, + 22, 23, 24, 25, 25, 26, 27, 27, + 28, 28, 29, 30, 30, 30, 31, 31, + 31, 32, 32, 32, 33, 33, 33, 34, + 34, 34, 34, 35, 35, 36, 36, 36, + 36, 36, 36, 37, 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, 42, 42, 42, 42, 42, 42, 42, + 42, 42, 42, 42, 42, 43, 43, 43, + 43, 43, 43, 43, 43, 43, 43, 43, + 43, 44, 44, 44, 44, 44, 44, 44, + 44, 44, 44, 44, 44, 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, + 46, 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, 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, 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, 51, + 51, 51, 51, 51, 51, 51, 51, 51, + 51, 52, 52, 52, 52, 52, 52, 52, + 52, 52, 52, 52, 52, 52, 52, 52, };