/* * Chinese AVS video (AVS1-P2, JiZhun profile) decoder. * Copyright (c) 2006 Stefan Gehrer * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * Chinese AVS video (AVS1-P2, JiZhun profile) decoder * @author Stefan Gehrer */ #include "libavutil/avassert.h" #include "avcodec.h" #include "get_bits.h" #include "golomb.h" #include "cavs.h" #include "internal.h" #include "mpeg12data.h" #include "mpegvideo.h" static const uint8_t mv_scan[4] = { MV_FWD_X0, MV_FWD_X1, MV_FWD_X2, MV_FWD_X3 }; static const uint8_t cbp_tab[64][2] = { { 63, 0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, { 0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 }, { 7, 14 }, { 5, 11 }, { 10, 12 }, { 8, 5 }, { 12, 10 }, { 61, 7 }, { 4, 48 }, { 55, 3 }, { 1, 2 }, { 2, 8 }, { 59, 4 }, { 3, 1 }, { 62, 61 }, { 9, 55 }, { 6, 59 }, { 29, 62 }, { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53, 9 }, { 30, 6 }, { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 }, { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 }, { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 }, { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 } }; static const uint8_t scan3x3[4] = { 4, 5, 7, 8 }; static const uint8_t dequant_shift[64] = { 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7 }; static const uint16_t dequant_mul[64] = { 32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424, 32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933, 65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097, 32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056, 65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076, 65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087, 65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097, 32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099 }; #define EOB 0, 0, 0 static const struct dec_2dvlc intra_dec[7] = { { { //level / run / table_inc { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 }, { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 }, { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 }, { 1, 15, 1 }, { -1, 15, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 2, 3, 2 }, { -2, 3, 2 }, { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 4, 2 }, { -2, 4, 2 }, { 1, 22, 1 }, { -1, 22, 1 }, { 2, 5, 2 }, { -2, 5, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { EOB } }, //level_add { 0, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1 }, 2, //golomb_order 0, //inc_limit 23, //max_run }, { { //level / run { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { EOB }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 2, 8, 1 }, { -2, 8, 1 }, { 3, 3, 2 }, { -3, 3, 2 }, { 6, 1, 3 }, { -6, 1, 3 }, { 1, 15, 0 }, { -1, 15, 0 } }, //level_add { 0, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 1, //inc_limit 15, //max_run }, { { //level / run { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { EOB }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 }, { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 }, { -7, 1, 2 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 3 }, { -8, 1, 3 }, { 1, 9, 0 }, { -1, 9, 0 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, { 2, 7, 0 }, { -2, 7, 0 }, { 9, 1, 3 }, { -9, 1, 3 }, { 1, 10, 0 }, { -1, 10, 0 } }, //level_add { 0, 10, 6, 4, 4, 3, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 2, //inc_limit 10, //max_run }, { { //level / run { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 1 }, { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 11, 1, 3 }, {-11, 1, 3 }, { 6, 2, 1 }, { -6, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 12, 1, 3 }, {-12, 1, 3 }, { 4, 3, 0 }, { -4, 3, 0 } }, //level_add { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 4, //inc_limit 7, //max_run }, { { //level / run { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 10, 1, 1 }, {-10, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 13, 1, 2 }, {-13, 1, 2 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 14, 1, 2 }, {-14, 1, 2 }, { 6, 2, 0 }, { -6, 2, 0 }, { 15, 1, 2 }, {-15, 1, 2 }, { 16, 1, 2 }, {-16, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 7, 2, 0 }, { -7, 2, 0 }, { 17, 1, 2 }, {-17, 1, 2 } }, //level_add { 0,18, 8, 4, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 7, //inc_limit 5, //max_run }, { { //level / run { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 12, 1, 1 }, {-12, 1, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 14, 1, 1 }, {-14, 1, 1 }, { 15, 1, 1 }, {-15, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 1 }, {-16, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 17, 1, 1 }, {-17, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 18, 1, 1 }, {-18, 1, 1 }, { 5, 2, 0 }, { -5, 2, 0 }, { 19, 1, 1 }, {-19, 1, 1 }, { 20, 1, 1 }, {-20, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 21, 1, 1 }, {-21, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 } }, //level_add { 0, 22, 7, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 10, //inc_limit 3, //max_run }, { { //level / run { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 11, 1, 0 }, {-11, 1, 0 }, { 12, 1, 0 }, {-12, 1, 0 }, { 13, 1, 0 }, {-13, 1, 0 }, { 14, 1, 0 }, {-14, 1, 0 }, { 15, 1, 0 }, {-15, 1, 0 }, { 16, 1, 0 }, {-16, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 17, 1, 0 }, {-17, 1, 0 }, { 18, 1, 0 }, {-18, 1, 0 }, { 19, 1, 0 }, {-19, 1, 0 }, { 20, 1, 0 }, {-20, 1, 0 }, { 21, 1, 0 }, {-21, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 22, 1, 0 }, {-22, 1, 0 }, { 23, 1, 0 }, {-23, 1, 0 }, { 24, 1, 0 }, {-24, 1, 0 }, { 25, 1, 0 }, {-25, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 26, 1, 0 }, {-26, 1, 0 } }, //level_add { 0, 27, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order INT_MAX, //inc_limit 2, //max_run } }; static const struct dec_2dvlc inter_dec[7] = { { { //level / run { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 }, { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 }, { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 14, 1 }, { -1, 14, 1 }, { 1, 15, 1 }, { -1, 15, 1 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 22, 1 }, { -1, 22, 1 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 }, { 1, 25, 1 }, { -1, 25, 1 }, { 1, 26, 1 }, { -1, 26, 1 }, { EOB } }, //level_add { 0, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 }, 3, //golomb_order 0, //inc_limit 26 //max_run }, { { //level / run { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 11, 0 }, { -1, 11, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 1, 16, 0 }, { -1, 16, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 17, 0 }, { -1, 17, 0 }, { 4, 1, 3 }, { -4, 1, 3 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 18, 0 }, { -1, 18, 0 }, { 1, 19, 0 }, { -1, 19, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 3, 2, 2 }, { -3, 2, 2 } }, //level_add { 0, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 1, //inc_limit 19 //max_run }, { { //level / run { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 5, 1, 2 }, { -5, 1, 2 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 6, 1, 2 }, { -6, 1, 2 }, { 4, 2, 2 }, { -4, 2, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 7, 0 }, { -2, 7, 0 }, { 3, 4, 1 }, { -3, 4, 1 }, { 1, 14, 0 }, { -1, 14, 0 } }, //level_add { 0, 7, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 2, //inc_limit 14 //max_run }, { { //level / run { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 1 }, { -5, 1, 1 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 }, { -7, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 1, 10, 0 }, { -1, 10, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 4, 3, 1 }, { -4, 3, 1 } }, //level_add { 0,10, 6, 5, 4, 3, 3, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 3, //inc_limit 10 //max_run }, { { //level / run { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 5, 2, 0 }, { -5, 2, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 4, 3, 0 }, { -4, 3, 0 } }, //level_add { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 6, //inc_limit 7 //max_run }, { { //level / run { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 10, 1, 1 }, { -10, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 1 }, { -11, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 1 }, { -12, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 13, 1, 1 }, { -13, 1, 1 }, { 5, 2, 0 }, { -5, 2, 0 }, { 14, 1, 1 }, { -14, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 15, 1, 1 }, { -15, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 16, 1, 1 }, { -16, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 2, 0 }, { -7, 2, 0 } }, //level_add { 0, 17, 8, 4, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order 9, //inc_limit 5 //max_run }, { { //level / run { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 }, { -11, 1, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 13, 1, 0 }, { -13, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 20, 1, 0 }, { -20, 1, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 21, 1, 0 }, { -21, 1, 0 } }, //level_add { 0, 22, 6, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 2, //golomb_order INT_MAX, //inc_limit 4 //max_run } }; static const struct dec_2dvlc chroma_dec[5] = { { { //level / run { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 }, { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 }, { 1, 7, 1 }, { -1, 7, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 }, { 1, 15, 1 }, { -1, 15, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 1, 22, 1 }, { -1, 22, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 }, { 1, 25, 1 }, { -1, 25, 1 }, { 4, 1, 3 }, { -4, 1, 3 }, { EOB } }, //level_add { 0, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1 }, 2, //golomb_order 0, //inc_limit 25 //max_run }, { { //level / run { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 16, 0 }, { -1, 16, 0 }, { 1, 17, 0 }, { -1, 17, 0 }, { 1, 18, 0 }, { -1, 18, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 19, 0 }, { -1, 19, 0 }, { 1, 20, 0 }, { -1, 20, 0 } }, //level_add { 0, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1 }, 0, //golomb_order 1, //inc_limit 20 //max_run }, { { //level / run { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 }, { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 1, 2 }, { -7, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, }, //level_add { 0,10, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 1, //golomb_order 2, //inc_limit 11 //max_run }, { { //level / run { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 5, 1, 1 }, { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 10, 1, 1 }, {-10, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 1, 6, 0 }, { -1, 6, 0 }, { 12, 1, 1 }, {-12, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 1 }, { -6, 2, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, }, //level_add { 0, 14, 7, 4, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 1, //golomb_order 4, //inc_limit 8 //max_run }, { { //level / run { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 }, { -11, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 13, 1, 0 }, { -13, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, }, //level_add { 0, 20, 7, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 0, //golomb_order INT_MAX, //inc_limit 5, //max_run } }; #undef EOB /***************************************************************************** * * motion vector prediction * ****************************************************************************/ static inline void store_mvs(AVSContext *h) { h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0]; h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1]; h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2]; h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3]; } static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw, cavs_vector *col_mv) { cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS; int den = h->direct_den[col_mv->ref]; int m = FF_SIGNBIT(col_mv->x); pmv_fw->dist = h->dist[1]; pmv_bw->dist = h->dist[0]; pmv_fw->ref = 1; pmv_bw->ref = 0; /* scale the co-located motion vector according to its temporal span */ pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m; pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m); m = FF_SIGNBIT(col_mv->y); pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m; pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m); } static inline void mv_pred_sym(AVSContext *h, cavs_vector *src, enum cavs_block size) { cavs_vector *dst = src + MV_BWD_OFFS; /* backward mv is the scaled and negated forward mv */ dst->x = -((src->x * h->sym_factor + 256) >> 9); dst->y = -((src->y * h->sym_factor + 256) >> 9); dst->ref = 0; dst->dist = h->dist[0]; set_mvs(dst, size); } /***************************************************************************** * * residual data decoding * ****************************************************************************/ /** kth-order exponential golomb code */ static inline int get_ue_code(GetBitContext *gb, int order) { unsigned ret = get_ue_golomb(gb); if (ret >= ((1U<<31)>>order)) { av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n"); return AVERROR_INVALIDDATA; } if (order) { return (ret<scantable.permutated; /* inverse scan and dequantization */ while (--coeff_num >= 0) { pos += run_buf[coeff_num]; if (pos > 63) { av_log(h->avctx, AV_LOG_ERROR, "position out of block bounds at pic %d MB(%d,%d)\n", h->cur.poc, h->mbx, h->mby); return AVERROR_INVALIDDATA; } dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift; } return 0; } /** * decode coefficients from one 8x8 block, dequantize, inverse transform * and add them to sample block * @param r pointer to 2D VLC table * @param esc_golomb_order escape codes are k-golomb with this order k * @param qp quantizer * @param dst location of sample block * @param stride line stride in frame buffer */ static int decode_residual_block(AVSContext *h, GetBitContext *gb, const struct dec_2dvlc *r, int esc_golomb_order, int qp, uint8_t *dst, int stride) { int i, esc_code, level, mask, ret; unsigned int level_code, run; int16_t level_buf[65]; uint8_t run_buf[65]; int16_t *block = h->block; for (i = 0; i < 65; i++) { level_code = get_ue_code(gb, r->golomb_order); if (level_code >= ESCAPE_CODE) { run = ((level_code - ESCAPE_CODE) >> 1) + 1; if(run > 64) { av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run); return AVERROR_INVALIDDATA; } esc_code = get_ue_code(gb, esc_golomb_order); if (esc_code < 0 || esc_code > 32767) { av_log(h->avctx, AV_LOG_ERROR, "esc_code invalid\n"); return AVERROR_INVALIDDATA; } level = esc_code + (run > r->max_run ? 1 : r->level_add[run]); while (level > r->inc_limit) r++; mask = -(level_code & 1); level = (level ^ mask) - mask; } else { level = r->rltab[level_code][0]; if (!level) //end of block signal break; run = r->rltab[level_code][1]; r += r->rltab[level_code][2]; } level_buf[i] = level; run_buf[i] = run; } if ((ret = dequant(h, level_buf, run_buf, block, dequant_mul[qp], dequant_shift[qp], i)) < 0) return ret; h->cdsp.cavs_idct8_add(dst, block, stride); h->bdsp.clear_block(block); return 0; } static inline void decode_residual_chroma(AVSContext *h) { if (h->cbp & (1 << 4)) decode_residual_block(h, &h->gb, chroma_dec, 0, ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride); if (h->cbp & (1 << 5)) decode_residual_block(h, &h->gb, chroma_dec, 0, ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride); } static inline int decode_residual_inter(AVSContext *h) { int block; /* get coded block pattern */ int cbp = get_ue_golomb(&h->gb); if (cbp > 63U) { av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp); return AVERROR_INVALIDDATA; } h->cbp = cbp_tab[cbp][1]; /* get quantizer */ if (h->cbp && !h->qp_fixed) h->qp = (h->qp + get_se_golomb(&h->gb)) & 63; for (block = 0; block < 4; block++) if (h->cbp & (1 << block)) decode_residual_block(h, &h->gb, inter_dec, 0, h->qp, h->cy + h->luma_scan[block], h->l_stride); decode_residual_chroma(h); return 0; } /***************************************************************************** * * macroblock level * ****************************************************************************/ static inline void set_mv_intra(AVSContext *h) { h->mv[MV_FWD_X0] = ff_cavs_intra_mv; set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); h->mv[MV_BWD_X0] = ff_cavs_intra_mv; set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) h->col_type_base[h->mbidx] = I_8X8; } static int decode_mb_i(AVSContext *h, int cbp_code) { GetBitContext *gb = &h->gb; unsigned pred_mode_uv; int block; uint8_t top[18]; uint8_t *left = NULL; uint8_t *d; ff_cavs_init_mb(h); /* get intra prediction modes from stream */ for (block = 0; block < 4; block++) { int nA, nB, predpred; int pos = scan3x3[block]; nA = h->pred_mode_Y[pos - 1]; nB = h->pred_mode_Y[pos - 3]; predpred = FFMIN(nA, nB); if (predpred == NOT_AVAIL) // if either is not available predpred = INTRA_L_LP; if (!get_bits1(gb)) { int rem_mode = get_bits(gb, 2); predpred = rem_mode + (rem_mode >= predpred); } h->pred_mode_Y[pos] = predpred; } pred_mode_uv = get_ue_golomb(gb); if (pred_mode_uv > 6) { av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n"); return AVERROR_INVALIDDATA; } ff_cavs_modify_mb_i(h, &pred_mode_uv); /* get coded block pattern */ if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) cbp_code = get_ue_golomb(gb); if (cbp_code > 63U) { av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n"); return AVERROR_INVALIDDATA; } h->cbp = cbp_tab[cbp_code][0]; if (h->cbp && !h->qp_fixed) h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta /* luma intra prediction interleaved with residual decode/transform/add */ for (block = 0; block < 4; block++) { d = h->cy + h->luma_scan[block]; ff_cavs_load_intra_pred_luma(h, top, &left, block); h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]] (d, top, left, h->l_stride); if (h->cbp & (1<qp, d, h->l_stride); } /* chroma intra prediction */ ff_cavs_load_intra_pred_chroma(h); h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10], h->left_border_u, h->c_stride); h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10], h->left_border_v, h->c_stride); decode_residual_chroma(h); ff_cavs_filter(h, I_8X8); set_mv_intra(h); return 0; } static inline void set_intra_mode_default(AVSContext *h) { if (h->stream_revision > 0) { h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL; h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL; } else { h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP; h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP; } } static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type) { GetBitContext *gb = &h->gb; int ref[4]; ff_cavs_init_mb(h); switch (mb_type) { case P_SKIP: ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0); break; case P_16X16: ref[0] = h->ref_flag ? 0 : get_bits1(gb); ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]); break; case P_16X8: ref[0] = h->ref_flag ? 0 : get_bits1(gb); ref[2] = h->ref_flag ? 0 : get_bits1(gb); ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]); ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]); break; case P_8X16: ref[0] = h->ref_flag ? 0 : get_bits1(gb); ref[1] = h->ref_flag ? 0 : get_bits1(gb); ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]); ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]); break; case P_8X8: ref[0] = h->ref_flag ? 0 : get_bits1(gb); ref[1] = h->ref_flag ? 0 : get_bits1(gb); ref[2] = h->ref_flag ? 0 : get_bits1(gb); ref[3] = h->ref_flag ? 0 : get_bits1(gb); ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]); ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]); ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]); ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]); } ff_cavs_inter(h, mb_type); set_intra_mode_default(h); store_mvs(h); if (mb_type != P_SKIP) decode_residual_inter(h); ff_cavs_filter(h, mb_type); h->col_type_base[h->mbidx] = mb_type; } static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type) { int block; enum cavs_sub_mb sub_type[4]; int flags; ff_cavs_init_mb(h); /* reset all MVs */ h->mv[MV_FWD_X0] = ff_cavs_dir_mv; set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); h->mv[MV_BWD_X0] = ff_cavs_dir_mv; set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); switch (mb_type) { case B_SKIP: case B_DIRECT: if (!h->col_type_base[h->mbidx]) { /* intra MB at co-location, do in-plane prediction */ ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1); ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0); } else /* direct prediction from co-located P MB, block-wise */ for (block = 0; block < 4; block++) mv_pred_direct(h, &h->mv[mv_scan[block]], &h->col_mv[h->mbidx * 4 + block]); break; case B_FWD_16X16: ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1); break; case B_SYM_16X16: ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1); mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16); break; case B_BWD_16X16: ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0); break; case B_8X8: #define TMP_UNUSED_INX 7 flags = 0; for (block = 0; block < 4; block++) sub_type[block] = get_bits(&h->gb, 2); for (block = 0; block < 4; block++) { switch (sub_type[block]) { case B_SUB_DIRECT: if (!h->col_type_base[h->mbidx]) { /* intra MB at co-location, do in-plane prediction */ if(flags==0) { // if col-MB is a Intra MB, current Block size is 16x16. // AVS standard section 9.9.1 if(block>0){ h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ]; h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS]; } ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_8X8, 1); ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS, MV_FWD_C2+MV_BWD_OFFS, MV_PRED_BSKIP, BLK_8X8, 0); if(block>0) { flags = mv_scan[block]; h->mv[flags ] = h->mv[MV_FWD_X0 ]; h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS]; h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ]; h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS]; } else flags = MV_FWD_X0; } else { h->mv[mv_scan[block] ] = h->mv[flags ]; h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS]; } } else mv_pred_direct(h, &h->mv[mv_scan[block]], &h->col_mv[h->mbidx * 4 + block]); break; case B_SUB_FWD: ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3, MV_PRED_MEDIAN, BLK_8X8, 1); break; case B_SUB_SYM: ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3, MV_PRED_MEDIAN, BLK_8X8, 1); mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8); break; } } #undef TMP_UNUSED_INX for (block = 0; block < 4; block++) { if (sub_type[block] == B_SUB_BWD) ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS, mv_scan[block] + MV_BWD_OFFS - 3, MV_PRED_MEDIAN, BLK_8X8, 0); } break; default: if (mb_type <= B_SYM_16X16) { av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type); return AVERROR_INVALIDDATA; } av_assert2(mb_type < B_8X8); flags = ff_cavs_partition_flags[mb_type]; if (mb_type & 1) { /* 16x8 macroblock types */ if (flags & FWD0) ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1); if (flags & SYM0) mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8); if (flags & FWD1) ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1); if (flags & SYM1) mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8); if (flags & BWD0) ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0); if (flags & BWD1) ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0); } else { /* 8x16 macroblock types */ if (flags & FWD0) ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1); if (flags & SYM0) mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16); if (flags & FWD1) ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1); if (flags & SYM1) mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16); if (flags & BWD0) ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0); if (flags & BWD1) ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0); } } ff_cavs_inter(h, mb_type); set_intra_mode_default(h); if (mb_type != B_SKIP) decode_residual_inter(h); ff_cavs_filter(h, mb_type); return 0; } /***************************************************************************** * * slice level * ****************************************************************************/ static inline int decode_slice_header(AVSContext *h, GetBitContext *gb) { if (h->stc > 0xAF) av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc); if (h->stc >= h->mb_height) { av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc); return AVERROR_INVALIDDATA; } h->mby = h->stc; h->mbidx = h->mby * h->mb_width; /* mark top macroblocks as unavailable */ h->flags &= ~(B_AVAIL | C_AVAIL); if (!h->pic_qp_fixed) { h->qp_fixed = get_bits1(gb); h->qp = get_bits(gb, 6); } /* inter frame or second slice can have weighting params */ if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) || (!h->pic_structure && h->mby >= h->mb_width / 2)) if (get_bits1(gb)) { //slice_weighting_flag av_log(h->avctx, AV_LOG_ERROR, "weighted prediction not yet supported\n"); } return 0; } static inline int check_for_slice(AVSContext *h) { GetBitContext *gb = &h->gb; int align; if (h->mbx) return 0; align = (-get_bits_count(gb)) & 7; /* check for stuffing byte */ if (!align && (show_bits(gb, 8) == 0x80)) align = 8; if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) { skip_bits_long(gb, 24 + align); h->stc = get_bits(gb, 8); if (h->stc >= h->mb_height) return 0; decode_slice_header(h, gb); return 1; } return 0; } /***************************************************************************** * * frame level * ****************************************************************************/ static int decode_pic(AVSContext *h) { int ret; int skip_count = -1; enum cavs_mb mb_type; if (!h->top_qp) { av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n"); return AVERROR_INVALIDDATA; } av_frame_unref(h->cur.f); skip_bits(&h->gb, 16);//bbv_dwlay if (h->stc == PIC_PB_START_CODE) { h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I; if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) { av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n"); return AVERROR_INVALIDDATA; } /* make sure we have the reference frames we need */ if (!h->DPB[0].f->data[0] || (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B)) return AVERROR_INVALIDDATA; } else { h->cur.f->pict_type = AV_PICTURE_TYPE_I; if (get_bits1(&h->gb)) skip_bits(&h->gb, 24);//time_code /* old sample clips were all progressive and no low_delay, bump stream revision if detected otherwise */ if (h->low_delay || !(show_bits(&h->gb, 9) & 1)) h->stream_revision = 1; /* similarly test top_field_first and repeat_first_field */ else if (show_bits(&h->gb, 11) & 3) h->stream_revision = 1; if (h->stream_revision > 0) skip_bits(&h->gb, 1); //marker_bit } ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ? 0 : AV_GET_BUFFER_FLAG_REF); if (ret < 0) return ret; if (!h->edge_emu_buffer) { int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32); h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24); if (!h->edge_emu_buffer) return AVERROR(ENOMEM); } if ((ret = ff_cavs_init_pic(h)) < 0) return ret; h->cur.poc = get_bits(&h->gb, 8) * 2; /* get temporal distances and MV scaling factors */ if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) { h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511; } else { h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511; } h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511; h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0; h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0; if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) { h->sym_factor = h->dist[0] * h->scale_den[1]; } else { h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0; h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0; } if (h->low_delay) get_ue_golomb(&h->gb); //bbv_check_times h->progressive = get_bits1(&h->gb); h->pic_structure = 1; if (!h->progressive) h->pic_structure = get_bits1(&h->gb); if (!h->pic_structure && h->stc == PIC_PB_START_CODE) skip_bits1(&h->gb); //advanced_pred_mode_disable skip_bits1(&h->gb); //top_field_first skip_bits1(&h->gb); //repeat_first_field h->pic_qp_fixed = h->qp_fixed = get_bits1(&h->gb); h->qp = get_bits(&h->gb, 6); if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) { if (!h->progressive && !h->pic_structure) skip_bits1(&h->gb);//what is this? skip_bits(&h->gb, 4); //reserved bits } else { if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1)) h->ref_flag = get_bits1(&h->gb); skip_bits(&h->gb, 4); //reserved bits h->skip_mode_flag = get_bits1(&h->gb); } h->loop_filter_disable = get_bits1(&h->gb); if (!h->loop_filter_disable && get_bits1(&h->gb)) { h->alpha_offset = get_se_golomb(&h->gb); h->beta_offset = get_se_golomb(&h->gb); } else { h->alpha_offset = h->beta_offset = 0; } if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) { do { check_for_slice(h); decode_mb_i(h, 0); } while (ff_cavs_next_mb(h)); } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) { do { if (check_for_slice(h)) skip_count = -1; if (h->skip_mode_flag && (skip_count < 0)) skip_count = get_ue_golomb(&h->gb); if (h->skip_mode_flag && skip_count--) { decode_mb_p(h, P_SKIP); } else { mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag; if (mb_type > P_8X8) decode_mb_i(h, mb_type - P_8X8 - 1); else decode_mb_p(h, mb_type); } } while (ff_cavs_next_mb(h)); } else { /* AV_PICTURE_TYPE_B */ do { if (check_for_slice(h)) skip_count = -1; if (h->skip_mode_flag && (skip_count < 0)) skip_count = get_ue_golomb(&h->gb); if (h->skip_mode_flag && skip_count--) { decode_mb_b(h, B_SKIP); } else { mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag; if (mb_type > B_8X8) decode_mb_i(h, mb_type - B_8X8 - 1); else decode_mb_b(h, mb_type); } } while (ff_cavs_next_mb(h)); } if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) { av_frame_unref(h->DPB[1].f); FFSWAP(AVSFrame, h->cur, h->DPB[1]); FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]); } return 0; } /***************************************************************************** * * headers and interface * ****************************************************************************/ static int decode_seq_header(AVSContext *h) { int frame_rate_code; int width, height; int ret; h->profile = get_bits(&h->gb, 8); h->level = get_bits(&h->gb, 8); skip_bits1(&h->gb); //progressive sequence width = get_bits(&h->gb, 14); height = get_bits(&h->gb, 14); if ((h->width || h->height) && (h->width != width || h->height != height)) { avpriv_report_missing_feature(h->avctx, "Width/height changing in CAVS"); return AVERROR_PATCHWELCOME; } if (width <= 0 || height <= 0) { av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n"); return AVERROR_INVALIDDATA; } skip_bits(&h->gb, 2); //chroma format skip_bits(&h->gb, 3); //sample_precision h->aspect_ratio = get_bits(&h->gb, 4); frame_rate_code = get_bits(&h->gb, 4); skip_bits(&h->gb, 18); //bit_rate_lower skip_bits1(&h->gb); //marker_bit skip_bits(&h->gb, 12); //bit_rate_upper h->low_delay = get_bits1(&h->gb); ret = ff_set_dimensions(h->avctx, width, height); if (ret < 0) return ret; h->width = width; h->height = height; h->mb_width = (h->width + 15) >> 4; h->mb_height = (h->height + 15) >> 4; h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code]; if (!h->top_qp) ff_cavs_init_top_lines(h); return 0; } static void cavs_flush(AVCodecContext * avctx) { AVSContext *h = avctx->priv_data; h->got_keyframe = 0; } static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt) { AVSContext *h = avctx->priv_data; const uint8_t *buf = avpkt->data; int buf_size = avpkt->size; uint32_t stc = -1; int input_size, ret; const uint8_t *buf_end; const uint8_t *buf_ptr; if (buf_size == 0) { if (!h->low_delay && h->DPB[0].f->data[0]) { *got_frame = 1; av_frame_move_ref(data, h->DPB[0].f); } return 0; } h->stc = 0; buf_ptr = buf; buf_end = buf + buf_size; for(;;) { buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc); if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) { if (!h->stc) av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n"); return FFMAX(0, buf_ptr - buf); } input_size = (buf_end - buf_ptr) * 8; switch (stc) { case CAVS_START_CODE: init_get_bits(&h->gb, buf_ptr, input_size); decode_seq_header(h); break; case PIC_I_START_CODE: if (!h->got_keyframe) { av_frame_unref(h->DPB[0].f); av_frame_unref(h->DPB[1].f); h->got_keyframe = 1; } case PIC_PB_START_CODE: *got_frame = 0; if (!h->got_keyframe) break; init_get_bits(&h->gb, buf_ptr, input_size); h->stc = stc; if (decode_pic(h)) break; *got_frame = 1; if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) { if (h->DPB[!h->low_delay].f->data[0]) { if ((ret = av_frame_ref(data, h->DPB[!h->low_delay].f)) < 0) return ret; } else { *got_frame = 0; } } else { av_frame_move_ref(data, h->cur.f); } break; case EXT_START_CODE: //mpeg_decode_extension(avctx, buf_ptr, input_size); break; case USER_START_CODE: //mpeg_decode_user_data(avctx, buf_ptr, input_size); break; default: if (stc <= SLICE_MAX_START_CODE) { init_get_bits(&h->gb, buf_ptr, input_size); decode_slice_header(h, &h->gb); } break; } } } AVCodec ff_cavs_decoder = { .name = "cavs", .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"), .type = AVMEDIA_TYPE_VIDEO, .id = AV_CODEC_ID_CAVS, .priv_data_size = sizeof(AVSContext), .init = ff_cavs_init, .close = ff_cavs_end, .decode = cavs_decode_frame, .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY, .flush = cavs_flush, };