| /* |
| * Chinese AVS video (AVS1-P2, JiZhun profile) decoder. |
| * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de> |
| * |
| * 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 <stefan.gehrer@gmx.de> |
| */ |
| |
| #include "libavutil/avassert.h" |
| #include "avcodec.h" |
| #include "get_bits.h" |
| #include "golomb.h" |
| #include "cavs.h" |
| #include "internal.h" |
| #include "mpeg12data.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<<order) + get_bits(gb, order); |
| } |
| return ret; |
| } |
| |
| static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf, |
| int16_t *dst, int mul, int shift, int coeff_num) |
| { |
| int round = 1 << (shift - 1); |
| int pos = -1; |
| const uint8_t *scantab = h->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<<block)) |
| decode_residual_block(h, gb, intra_dec, 1, h->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); |
| if (frame_rate_code == 0 || frame_rate_code > 13) { |
| av_log(h->avctx, AV_LOG_WARNING, |
| "frame_rate_code %d is invalid\n", frame_rate_code); |
| frame_rate_code = 1; |
| } |
| |
| 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) |
| return 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 = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY, |
| .flush = cavs_flush, |
| }; |
