| /* |
| * LucasArts Smush video decoder |
| * Copyright (c) 2006 Cyril Zorin |
| * Copyright (c) 2011 Konstantin Shishkov |
| * |
| * 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 |
| */ |
| |
| #include "libavutil/avassert.h" |
| #include "libavutil/bswap.h" |
| #include "libavutil/imgutils.h" |
| |
| #include "avcodec.h" |
| #include "bytestream.h" |
| #include "copy_block.h" |
| #include "internal.h" |
| |
| #define NGLYPHS 256 |
| #define GLYPH_COORD_VECT_SIZE 16 |
| #define PALETTE_SIZE 256 |
| #define PALETTE_DELTA 768 |
| |
| static const int8_t glyph4_x[GLYPH_COORD_VECT_SIZE] = { |
| 0, 1, 2, 3, 3, 3, 3, 2, 1, 0, 0, 0, 1, 2, 2, 1 |
| }; |
| |
| static const int8_t glyph4_y[GLYPH_COORD_VECT_SIZE] = { |
| 0, 0, 0, 0, 1, 2, 3, 3, 3, 3, 2, 1, 1, 1, 2, 2 |
| }; |
| |
| static const int8_t glyph8_x[GLYPH_COORD_VECT_SIZE] = { |
| 0, 2, 5, 7, 7, 7, 7, 7, 7, 5, 2, 0, 0, 0, 0, 0 |
| }; |
| |
| static const int8_t glyph8_y[GLYPH_COORD_VECT_SIZE] = { |
| 0, 0, 0, 0, 1, 3, 4, 6, 7, 7, 7, 7, 6, 4, 3, 1 |
| }; |
| |
| static const int8_t motion_vectors[256][2] = { |
| { 0, 0 }, { -1, -43 }, { 6, -43 }, { -9, -42 }, { 13, -41 }, |
| { -16, -40 }, { 19, -39 }, { -23, -36 }, { 26, -34 }, { -2, -33 }, |
| { 4, -33 }, { -29, -32 }, { -9, -32 }, { 11, -31 }, { -16, -29 }, |
| { 32, -29 }, { 18, -28 }, { -34, -26 }, { -22, -25 }, { -1, -25 }, |
| { 3, -25 }, { -7, -24 }, { 8, -24 }, { 24, -23 }, { 36, -23 }, |
| { -12, -22 }, { 13, -21 }, { -38, -20 }, { 0, -20 }, { -27, -19 }, |
| { -4, -19 }, { 4, -19 }, { -17, -18 }, { -8, -17 }, { 8, -17 }, |
| { 18, -17 }, { 28, -17 }, { 39, -17 }, { -12, -15 }, { 12, -15 }, |
| { -21, -14 }, { -1, -14 }, { 1, -14 }, { -41, -13 }, { -5, -13 }, |
| { 5, -13 }, { 21, -13 }, { -31, -12 }, { -15, -11 }, { -8, -11 }, |
| { 8, -11 }, { 15, -11 }, { -2, -10 }, { 1, -10 }, { 31, -10 }, |
| { -23, -9 }, { -11, -9 }, { -5, -9 }, { 4, -9 }, { 11, -9 }, |
| { 42, -9 }, { 6, -8 }, { 24, -8 }, { -18, -7 }, { -7, -7 }, |
| { -3, -7 }, { -1, -7 }, { 2, -7 }, { 18, -7 }, { -43, -6 }, |
| { -13, -6 }, { -4, -6 }, { 4, -6 }, { 8, -6 }, { -33, -5 }, |
| { -9, -5 }, { -2, -5 }, { 0, -5 }, { 2, -5 }, { 5, -5 }, |
| { 13, -5 }, { -25, -4 }, { -6, -4 }, { -3, -4 }, { 3, -4 }, |
| { 9, -4 }, { -19, -3 }, { -7, -3 }, { -4, -3 }, { -2, -3 }, |
| { -1, -3 }, { 0, -3 }, { 1, -3 }, { 2, -3 }, { 4, -3 }, |
| { 6, -3 }, { 33, -3 }, { -14, -2 }, { -10, -2 }, { -5, -2 }, |
| { -3, -2 }, { -2, -2 }, { -1, -2 }, { 0, -2 }, { 1, -2 }, |
| { 2, -2 }, { 3, -2 }, { 5, -2 }, { 7, -2 }, { 14, -2 }, |
| { 19, -2 }, { 25, -2 }, { 43, -2 }, { -7, -1 }, { -3, -1 }, |
| { -2, -1 }, { -1, -1 }, { 0, -1 }, { 1, -1 }, { 2, -1 }, |
| { 3, -1 }, { 10, -1 }, { -5, 0 }, { -3, 0 }, { -2, 0 }, |
| { -1, 0 }, { 1, 0 }, { 2, 0 }, { 3, 0 }, { 5, 0 }, |
| { 7, 0 }, { -10, 1 }, { -7, 1 }, { -3, 1 }, { -2, 1 }, |
| { -1, 1 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1 }, |
| { -43, 2 }, { -25, 2 }, { -19, 2 }, { -14, 2 }, { -5, 2 }, |
| { -3, 2 }, { -2, 2 }, { -1, 2 }, { 0, 2 }, { 1, 2 }, |
| { 2, 2 }, { 3, 2 }, { 5, 2 }, { 7, 2 }, { 10, 2 }, |
| { 14, 2 }, { -33, 3 }, { -6, 3 }, { -4, 3 }, { -2, 3 }, |
| { -1, 3 }, { 0, 3 }, { 1, 3 }, { 2, 3 }, { 4, 3 }, |
| { 19, 3 }, { -9, 4 }, { -3, 4 }, { 3, 4 }, { 7, 4 }, |
| { 25, 4 }, { -13, 5 }, { -5, 5 }, { -2, 5 }, { 0, 5 }, |
| { 2, 5 }, { 5, 5 }, { 9, 5 }, { 33, 5 }, { -8, 6 }, |
| { -4, 6 }, { 4, 6 }, { 13, 6 }, { 43, 6 }, { -18, 7 }, |
| { -2, 7 }, { 0, 7 }, { 2, 7 }, { 7, 7 }, { 18, 7 }, |
| { -24, 8 }, { -6, 8 }, { -42, 9 }, { -11, 9 }, { -4, 9 }, |
| { 5, 9 }, { 11, 9 }, { 23, 9 }, { -31, 10 }, { -1, 10 }, |
| { 2, 10 }, { -15, 11 }, { -8, 11 }, { 8, 11 }, { 15, 11 }, |
| { 31, 12 }, { -21, 13 }, { -5, 13 }, { 5, 13 }, { 41, 13 }, |
| { -1, 14 }, { 1, 14 }, { 21, 14 }, { -12, 15 }, { 12, 15 }, |
| { -39, 17 }, { -28, 17 }, { -18, 17 }, { -8, 17 }, { 8, 17 }, |
| { 17, 18 }, { -4, 19 }, { 0, 19 }, { 4, 19 }, { 27, 19 }, |
| { 38, 20 }, { -13, 21 }, { 12, 22 }, { -36, 23 }, { -24, 23 }, |
| { -8, 24 }, { 7, 24 }, { -3, 25 }, { 1, 25 }, { 22, 25 }, |
| { 34, 26 }, { -18, 28 }, { -32, 29 }, { 16, 29 }, { -11, 31 }, |
| { 9, 32 }, { 29, 32 }, { -4, 33 }, { 2, 33 }, { -26, 34 }, |
| { 23, 36 }, { -19, 39 }, { 16, 40 }, { -13, 41 }, { 9, 42 }, |
| { -6, 43 }, { 1, 43 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, |
| }; |
| |
| static const int8_t c37_mv[] = { |
| 0, 0, 1, 0, 2, 0, 3, 0, 5, 0, |
| 8, 0, 13, 0, 21, 0, -1, 0, -2, 0, |
| -3, 0, -5, 0, -8, 0, -13, 0, -17, 0, |
| -21, 0, 0, 1, 1, 1, 2, 1, 3, 1, |
| 5, 1, 8, 1, 13, 1, 21, 1, -1, 1, |
| -2, 1, -3, 1, -5, 1, -8, 1, -13, 1, |
| -17, 1, -21, 1, 0, 2, 1, 2, 2, 2, |
| 3, 2, 5, 2, 8, 2, 13, 2, 21, 2, |
| -1, 2, -2, 2, -3, 2, -5, 2, -8, 2, |
| -13, 2, -17, 2, -21, 2, 0, 3, 1, 3, |
| 2, 3, 3, 3, 5, 3, 8, 3, 13, 3, |
| 21, 3, -1, 3, -2, 3, -3, 3, -5, 3, |
| -8, 3, -13, 3, -17, 3, -21, 3, 0, 5, |
| 1, 5, 2, 5, 3, 5, 5, 5, 8, 5, |
| 13, 5, 21, 5, -1, 5, -2, 5, -3, 5, |
| -5, 5, -8, 5, -13, 5, -17, 5, -21, 5, |
| 0, 8, 1, 8, 2, 8, 3, 8, 5, 8, |
| 8, 8, 13, 8, 21, 8, -1, 8, -2, 8, |
| -3, 8, -5, 8, -8, 8, -13, 8, -17, 8, |
| -21, 8, 0, 13, 1, 13, 2, 13, 3, 13, |
| 5, 13, 8, 13, 13, 13, 21, 13, -1, 13, |
| -2, 13, -3, 13, -5, 13, -8, 13, -13, 13, |
| -17, 13, -21, 13, 0, 21, 1, 21, 2, 21, |
| 3, 21, 5, 21, 8, 21, 13, 21, 21, 21, |
| -1, 21, -2, 21, -3, 21, -5, 21, -8, 21, |
| -13, 21, -17, 21, -21, 21, 0, -1, 1, -1, |
| 2, -1, 3, -1, 5, -1, 8, -1, 13, -1, |
| 21, -1, -1, -1, -2, -1, -3, -1, -5, -1, |
| -8, -1, -13, -1, -17, -1, -21, -1, 0, -2, |
| 1, -2, 2, -2, 3, -2, 5, -2, 8, -2, |
| 13, -2, 21, -2, -1, -2, -2, -2, -3, -2, |
| -5, -2, -8, -2, -13, -2, -17, -2, -21, -2, |
| 0, -3, 1, -3, 2, -3, 3, -3, 5, -3, |
| 8, -3, 13, -3, 21, -3, -1, -3, -2, -3, |
| -3, -3, -5, -3, -8, -3, -13, -3, -17, -3, |
| -21, -3, 0, -5, 1, -5, 2, -5, 3, -5, |
| 5, -5, 8, -5, 13, -5, 21, -5, -1, -5, |
| -2, -5, -3, -5, -5, -5, -8, -5, -13, -5, |
| -17, -5, -21, -5, 0, -8, 1, -8, 2, -8, |
| 3, -8, 5, -8, 8, -8, 13, -8, 21, -8, |
| -1, -8, -2, -8, -3, -8, -5, -8, -8, -8, |
| -13, -8, -17, -8, -21, -8, 0, -13, 1, -13, |
| 2, -13, 3, -13, 5, -13, 8, -13, 13, -13, |
| 21, -13, -1, -13, -2, -13, -3, -13, -5, -13, |
| -8, -13, -13, -13, -17, -13, -21, -13, 0, -17, |
| 1, -17, 2, -17, 3, -17, 5, -17, 8, -17, |
| 13, -17, 21, -17, -1, -17, -2, -17, -3, -17, |
| -5, -17, -8, -17, -13, -17, -17, -17, -21, -17, |
| 0, -21, 1, -21, 2, -21, 3, -21, 5, -21, |
| 8, -21, 13, -21, 21, -21, -1, -21, -2, -21, |
| -3, -21, -5, -21, -8, -21, -13, -21, -17, -21, |
| 0, 0, -8, -29, 8, -29, -18, -25, 17, -25, |
| 0, -23, -6, -22, 6, -22, -13, -19, 12, -19, |
| 0, -18, 25, -18, -25, -17, -5, -17, 5, -17, |
| -10, -15, 10, -15, 0, -14, -4, -13, 4, -13, |
| 19, -13, -19, -12, -8, -11, -2, -11, 0, -11, |
| 2, -11, 8, -11, -15, -10, -4, -10, 4, -10, |
| 15, -10, -6, -9, -1, -9, 1, -9, 6, -9, |
| -29, -8, -11, -8, -8, -8, -3, -8, 3, -8, |
| 8, -8, 11, -8, 29, -8, -5, -7, -2, -7, |
| 0, -7, 2, -7, 5, -7, -22, -6, -9, -6, |
| -6, -6, -3, -6, -1, -6, 1, -6, 3, -6, |
| 6, -6, 9, -6, 22, -6, -17, -5, -7, -5, |
| -4, -5, -2, -5, 0, -5, 2, -5, 4, -5, |
| 7, -5, 17, -5, -13, -4, -10, -4, -5, -4, |
| -3, -4, -1, -4, 0, -4, 1, -4, 3, -4, |
| 5, -4, 10, -4, 13, -4, -8, -3, -6, -3, |
| -4, -3, -3, -3, -2, -3, -1, -3, 0, -3, |
| 1, -3, 2, -3, 4, -3, 6, -3, 8, -3, |
| -11, -2, -7, -2, -5, -2, -3, -2, -2, -2, |
| -1, -2, 0, -2, 1, -2, 2, -2, 3, -2, |
| 5, -2, 7, -2, 11, -2, -9, -1, -6, -1, |
| -4, -1, -3, -1, -2, -1, -1, -1, 0, -1, |
| 1, -1, 2, -1, 3, -1, 4, -1, 6, -1, |
| 9, -1, -31, 0, -23, 0, -18, 0, -14, 0, |
| -11, 0, -7, 0, -5, 0, -4, 0, -3, 0, |
| -2, 0, -1, 0, 0, -31, 1, 0, 2, 0, |
| 3, 0, 4, 0, 5, 0, 7, 0, 11, 0, |
| 14, 0, 18, 0, 23, 0, 31, 0, -9, 1, |
| -6, 1, -4, 1, -3, 1, -2, 1, -1, 1, |
| 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, |
| 6, 1, 9, 1, -11, 2, -7, 2, -5, 2, |
| -3, 2, -2, 2, -1, 2, 0, 2, 1, 2, |
| 2, 2, 3, 2, 5, 2, 7, 2, 11, 2, |
| -8, 3, -6, 3, -4, 3, -2, 3, -1, 3, |
| 0, 3, 1, 3, 2, 3, 3, 3, 4, 3, |
| 6, 3, 8, 3, -13, 4, -10, 4, -5, 4, |
| -3, 4, -1, 4, 0, 4, 1, 4, 3, 4, |
| 5, 4, 10, 4, 13, 4, -17, 5, -7, 5, |
| -4, 5, -2, 5, 0, 5, 2, 5, 4, 5, |
| 7, 5, 17, 5, -22, 6, -9, 6, -6, 6, |
| -3, 6, -1, 6, 1, 6, 3, 6, 6, 6, |
| 9, 6, 22, 6, -5, 7, -2, 7, 0, 7, |
| 2, 7, 5, 7, -29, 8, -11, 8, -8, 8, |
| -3, 8, 3, 8, 8, 8, 11, 8, 29, 8, |
| -6, 9, -1, 9, 1, 9, 6, 9, -15, 10, |
| -4, 10, 4, 10, 15, 10, -8, 11, -2, 11, |
| 0, 11, 2, 11, 8, 11, 19, 12, -19, 13, |
| -4, 13, 4, 13, 0, 14, -10, 15, 10, 15, |
| -5, 17, 5, 17, 25, 17, -25, 18, 0, 18, |
| -12, 19, 13, 19, -6, 22, 6, 22, 0, 23, |
| -17, 25, 18, 25, -8, 29, 8, 29, 0, 31, |
| 0, 0, -6, -22, 6, -22, -13, -19, 12, -19, |
| 0, -18, -5, -17, 5, -17, -10, -15, 10, -15, |
| 0, -14, -4, -13, 4, -13, 19, -13, -19, -12, |
| -8, -11, -2, -11, 0, -11, 2, -11, 8, -11, |
| -15, -10, -4, -10, 4, -10, 15, -10, -6, -9, |
| -1, -9, 1, -9, 6, -9, -11, -8, -8, -8, |
| -3, -8, 0, -8, 3, -8, 8, -8, 11, -8, |
| -5, -7, -2, -7, 0, -7, 2, -7, 5, -7, |
| -22, -6, -9, -6, -6, -6, -3, -6, -1, -6, |
| 1, -6, 3, -6, 6, -6, 9, -6, 22, -6, |
| -17, -5, -7, -5, -4, -5, -2, -5, -1, -5, |
| 0, -5, 1, -5, 2, -5, 4, -5, 7, -5, |
| 17, -5, -13, -4, -10, -4, -5, -4, -3, -4, |
| -2, -4, -1, -4, 0, -4, 1, -4, 2, -4, |
| 3, -4, 5, -4, 10, -4, 13, -4, -8, -3, |
| -6, -3, -4, -3, -3, -3, -2, -3, -1, -3, |
| 0, -3, 1, -3, 2, -3, 3, -3, 4, -3, |
| 6, -3, 8, -3, -11, -2, -7, -2, -5, -2, |
| -4, -2, -3, -2, -2, -2, -1, -2, 0, -2, |
| 1, -2, 2, -2, 3, -2, 4, -2, 5, -2, |
| 7, -2, 11, -2, -9, -1, -6, -1, -5, -1, |
| -4, -1, -3, -1, -2, -1, -1, -1, 0, -1, |
| 1, -1, 2, -1, 3, -1, 4, -1, 5, -1, |
| 6, -1, 9, -1, -23, 0, -18, 0, -14, 0, |
| -11, 0, -7, 0, -5, 0, -4, 0, -3, 0, |
| -2, 0, -1, 0, 0, -23, 1, 0, 2, 0, |
| 3, 0, 4, 0, 5, 0, 7, 0, 11, 0, |
| 14, 0, 18, 0, 23, 0, -9, 1, -6, 1, |
| -5, 1, -4, 1, -3, 1, -2, 1, -1, 1, |
| 0, 1, 1, 1, 2, 1, 3, 1, 4, 1, |
| 5, 1, 6, 1, 9, 1, -11, 2, -7, 2, |
| -5, 2, -4, 2, -3, 2, -2, 2, -1, 2, |
| 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, |
| 5, 2, 7, 2, 11, 2, -8, 3, -6, 3, |
| -4, 3, -3, 3, -2, 3, -1, 3, 0, 3, |
| 1, 3, 2, 3, 3, 3, 4, 3, 6, 3, |
| 8, 3, -13, 4, -10, 4, -5, 4, -3, 4, |
| -2, 4, -1, 4, 0, 4, 1, 4, 2, 4, |
| 3, 4, 5, 4, 10, 4, 13, 4, -17, 5, |
| -7, 5, -4, 5, -2, 5, -1, 5, 0, 5, |
| 1, 5, 2, 5, 4, 5, 7, 5, 17, 5, |
| -22, 6, -9, 6, -6, 6, -3, 6, -1, 6, |
| 1, 6, 3, 6, 6, 6, 9, 6, 22, 6, |
| -5, 7, -2, 7, 0, 7, 2, 7, 5, 7, |
| -11, 8, -8, 8, -3, 8, 0, 8, 3, 8, |
| 8, 8, 11, 8, -6, 9, -1, 9, 1, 9, |
| 6, 9, -15, 10, -4, 10, 4, 10, 15, 10, |
| -8, 11, -2, 11, 0, 11, 2, 11, 8, 11, |
| 19, 12, -19, 13, -4, 13, 4, 13, 0, 14, |
| -10, 15, 10, 15, -5, 17, 5, 17, 0, 18, |
| -12, 19, 13, 19, -6, 22, 6, 22, 0, 23, |
| }; |
| |
| typedef struct SANMVideoContext { |
| AVCodecContext *avctx; |
| GetByteContext gb; |
| |
| int version, subversion; |
| uint32_t pal[PALETTE_SIZE]; |
| int16_t delta_pal[PALETTE_DELTA]; |
| |
| ptrdiff_t pitch; |
| int width, height; |
| int aligned_width, aligned_height; |
| int prev_seq; |
| |
| AVFrame *frame; |
| uint16_t *frm0, *frm1, *frm2; |
| uint8_t *stored_frame; |
| uint32_t frm0_size, frm1_size, frm2_size; |
| uint32_t stored_frame_size; |
| |
| uint8_t *rle_buf; |
| unsigned int rle_buf_size; |
| |
| int rotate_code; |
| |
| long npixels, buf_size; |
| |
| uint16_t codebook[256]; |
| uint16_t small_codebook[4]; |
| |
| int8_t p4x4glyphs[NGLYPHS][16]; |
| int8_t p8x8glyphs[NGLYPHS][64]; |
| } SANMVideoContext; |
| |
| typedef struct SANMFrameHeader { |
| int seq_num, codec, rotate_code, rle_output_size; |
| |
| uint16_t bg_color; |
| uint32_t width, height; |
| } SANMFrameHeader; |
| |
| enum GlyphEdge { |
| LEFT_EDGE, |
| TOP_EDGE, |
| RIGHT_EDGE, |
| BOTTOM_EDGE, |
| NO_EDGE |
| }; |
| |
| enum GlyphDir { |
| DIR_LEFT, |
| DIR_UP, |
| DIR_RIGHT, |
| DIR_DOWN, |
| NO_DIR |
| }; |
| |
| /** |
| * Return enum GlyphEdge of box where point (x, y) lies. |
| * |
| * @param x x point coordinate |
| * @param y y point coordinate |
| * @param edge_size box width/height. |
| */ |
| static enum GlyphEdge which_edge(int x, int y, int edge_size) |
| { |
| const int edge_max = edge_size - 1; |
| |
| if (!y) |
| return BOTTOM_EDGE; |
| else if (y == edge_max) |
| return TOP_EDGE; |
| else if (!x) |
| return LEFT_EDGE; |
| else if (x == edge_max) |
| return RIGHT_EDGE; |
| else |
| return NO_EDGE; |
| } |
| |
| static enum GlyphDir which_direction(enum GlyphEdge edge0, enum GlyphEdge edge1) |
| { |
| if ((edge0 == LEFT_EDGE && edge1 == RIGHT_EDGE) || |
| (edge1 == LEFT_EDGE && edge0 == RIGHT_EDGE) || |
| (edge0 == BOTTOM_EDGE && edge1 != TOP_EDGE) || |
| (edge1 == BOTTOM_EDGE && edge0 != TOP_EDGE)) |
| return DIR_UP; |
| else if ((edge0 == TOP_EDGE && edge1 != BOTTOM_EDGE) || |
| (edge1 == TOP_EDGE && edge0 != BOTTOM_EDGE)) |
| return DIR_DOWN; |
| else if ((edge0 == LEFT_EDGE && edge1 != RIGHT_EDGE) || |
| (edge1 == LEFT_EDGE && edge0 != RIGHT_EDGE)) |
| return DIR_LEFT; |
| else if ((edge0 == TOP_EDGE && edge1 == BOTTOM_EDGE) || |
| (edge1 == TOP_EDGE && edge0 == BOTTOM_EDGE) || |
| (edge0 == RIGHT_EDGE && edge1 != LEFT_EDGE) || |
| (edge1 == RIGHT_EDGE && edge0 != LEFT_EDGE)) |
| return DIR_RIGHT; |
| |
| return NO_DIR; |
| } |
| |
| /* Interpolate two points. */ |
| static void interp_point(int8_t *points, int x0, int y0, int x1, int y1, |
| int pos, int npoints) |
| { |
| if (npoints) { |
| points[0] = (x0 * pos + x1 * (npoints - pos) + (npoints >> 1)) / npoints; |
| points[1] = (y0 * pos + y1 * (npoints - pos) + (npoints >> 1)) / npoints; |
| } else { |
| points[0] = x0; |
| points[1] = y0; |
| } |
| } |
| |
| /** |
| * Construct glyphs by iterating through vector coordinates. |
| * |
| * @param pglyphs pointer to table where glyphs are stored |
| * @param xvec pointer to x component of vector coordinates |
| * @param yvec pointer to y component of vector coordinates |
| * @param side_length glyph width/height. |
| */ |
| static void make_glyphs(int8_t *pglyphs, const int8_t *xvec, const int8_t *yvec, |
| const int side_length) |
| { |
| const int glyph_size = side_length * side_length; |
| int8_t *pglyph = pglyphs; |
| |
| int i, j; |
| for (i = 0; i < GLYPH_COORD_VECT_SIZE; i++) { |
| int x0 = xvec[i]; |
| int y0 = yvec[i]; |
| enum GlyphEdge edge0 = which_edge(x0, y0, side_length); |
| |
| for (j = 0; j < GLYPH_COORD_VECT_SIZE; j++, pglyph += glyph_size) { |
| int x1 = xvec[j]; |
| int y1 = yvec[j]; |
| enum GlyphEdge edge1 = which_edge(x1, y1, side_length); |
| enum GlyphDir dir = which_direction(edge0, edge1); |
| int npoints = FFMAX(FFABS(x1 - x0), FFABS(y1 - y0)); |
| int ipoint; |
| |
| for (ipoint = 0; ipoint <= npoints; ipoint++) { |
| int8_t point[2]; |
| int irow, icol; |
| |
| interp_point(point, x0, y0, x1, y1, ipoint, npoints); |
| |
| switch (dir) { |
| case DIR_UP: |
| for (irow = point[1]; irow >= 0; irow--) |
| pglyph[point[0] + irow * side_length] = 1; |
| break; |
| |
| case DIR_DOWN: |
| for (irow = point[1]; irow < side_length; irow++) |
| pglyph[point[0] + irow * side_length] = 1; |
| break; |
| |
| case DIR_LEFT: |
| for (icol = point[0]; icol >= 0; icol--) |
| pglyph[icol + point[1] * side_length] = 1; |
| break; |
| |
| case DIR_RIGHT: |
| for (icol = point[0]; icol < side_length; icol++) |
| pglyph[icol + point[1] * side_length] = 1; |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| static void init_sizes(SANMVideoContext *ctx, int width, int height) |
| { |
| ctx->width = width; |
| ctx->height = height; |
| ctx->npixels = width * height; |
| |
| ctx->aligned_width = FFALIGN(width, 8); |
| ctx->aligned_height = FFALIGN(height, 8); |
| |
| ctx->buf_size = ctx->aligned_width * ctx->aligned_height * sizeof(ctx->frm0[0]); |
| ctx->pitch = width; |
| } |
| |
| static void destroy_buffers(SANMVideoContext *ctx) |
| { |
| av_freep(&ctx->frm0); |
| av_freep(&ctx->frm1); |
| av_freep(&ctx->frm2); |
| av_freep(&ctx->stored_frame); |
| av_freep(&ctx->rle_buf); |
| ctx->frm0_size = |
| ctx->frm1_size = |
| ctx->frm2_size = 0; |
| init_sizes(ctx, 0, 0); |
| } |
| |
| static av_cold int init_buffers(SANMVideoContext *ctx) |
| { |
| av_fast_padded_mallocz(&ctx->frm0, &ctx->frm0_size, ctx->buf_size); |
| av_fast_padded_mallocz(&ctx->frm1, &ctx->frm1_size, ctx->buf_size); |
| av_fast_padded_mallocz(&ctx->frm2, &ctx->frm2_size, ctx->buf_size); |
| if (!ctx->version) |
| av_fast_padded_mallocz(&ctx->stored_frame, |
| &ctx->stored_frame_size, ctx->buf_size); |
| |
| if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 || |
| (!ctx->stored_frame && !ctx->version)) { |
| destroy_buffers(ctx); |
| return AVERROR(ENOMEM); |
| } |
| |
| return 0; |
| } |
| |
| static void rotate_bufs(SANMVideoContext *ctx, int rotate_code) |
| { |
| if (rotate_code == 2) |
| FFSWAP(uint16_t*, ctx->frm1, ctx->frm2); |
| FFSWAP(uint16_t*, ctx->frm2, ctx->frm0); |
| } |
| |
| static av_cold int decode_init(AVCodecContext *avctx) |
| { |
| SANMVideoContext *ctx = avctx->priv_data; |
| |
| ctx->avctx = avctx; |
| ctx->version = !avctx->extradata_size; |
| // early sanity check before allocations to avoid need for deallocation code. |
| if (!ctx->version && avctx->extradata_size < 1026) { |
| av_log(avctx, AV_LOG_ERROR, "Not enough extradata.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| avctx->pix_fmt = ctx->version ? AV_PIX_FMT_RGB565 : AV_PIX_FMT_PAL8; |
| |
| init_sizes(ctx, avctx->width, avctx->height); |
| if (init_buffers(ctx)) { |
| av_log(avctx, AV_LOG_ERROR, "Error allocating buffers.\n"); |
| return AVERROR(ENOMEM); |
| } |
| |
| make_glyphs(ctx->p4x4glyphs[0], glyph4_x, glyph4_y, 4); |
| make_glyphs(ctx->p8x8glyphs[0], glyph8_x, glyph8_y, 8); |
| |
| if (!ctx->version) { |
| int i; |
| |
| ctx->subversion = AV_RL16(avctx->extradata); |
| for (i = 0; i < PALETTE_SIZE; i++) |
| ctx->pal[i] = 0xFFU << 24 | AV_RL32(avctx->extradata + 2 + i * 4); |
| } |
| |
| return 0; |
| } |
| |
| static av_cold int decode_end(AVCodecContext *avctx) |
| { |
| SANMVideoContext *ctx = avctx->priv_data; |
| |
| destroy_buffers(ctx); |
| |
| return 0; |
| } |
| |
| static int rle_decode(SANMVideoContext *ctx, uint8_t *dst, const int out_size) |
| { |
| int opcode, color, run_len, left = out_size; |
| |
| while (left > 0) { |
| opcode = bytestream2_get_byte(&ctx->gb); |
| run_len = (opcode >> 1) + 1; |
| if (run_len > left || bytestream2_get_bytes_left(&ctx->gb) <= 0) |
| return AVERROR_INVALIDDATA; |
| |
| if (opcode & 1) { |
| color = bytestream2_get_byte(&ctx->gb); |
| memset(dst, color, run_len); |
| } else { |
| if (bytestream2_get_bytes_left(&ctx->gb) < run_len) |
| return AVERROR_INVALIDDATA; |
| bytestream2_get_bufferu(&ctx->gb, dst, run_len); |
| } |
| |
| dst += run_len; |
| left -= run_len; |
| } |
| |
| return 0; |
| } |
| |
| static int old_codec1(SANMVideoContext *ctx, int top, |
| int left, int width, int height) |
| { |
| uint8_t *dst = ((uint8_t *)ctx->frm0) + left + top * ctx->pitch; |
| int i, j, len, flag, code, val, pos, end; |
| |
| for (i = 0; i < height; i++) { |
| pos = 0; |
| |
| if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
| return AVERROR_INVALIDDATA; |
| |
| len = bytestream2_get_le16u(&ctx->gb); |
| end = bytestream2_tell(&ctx->gb) + len; |
| |
| while (bytestream2_tell(&ctx->gb) < end) { |
| if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
| return AVERROR_INVALIDDATA; |
| |
| code = bytestream2_get_byteu(&ctx->gb); |
| flag = code & 1; |
| code = (code >> 1) + 1; |
| if (pos + code > width) |
| return AVERROR_INVALIDDATA; |
| if (flag) { |
| val = bytestream2_get_byteu(&ctx->gb); |
| if (val) |
| memset(dst + pos, val, code); |
| pos += code; |
| } else { |
| if (bytestream2_get_bytes_left(&ctx->gb) < code) |
| return AVERROR_INVALIDDATA; |
| for (j = 0; j < code; j++) { |
| val = bytestream2_get_byteu(&ctx->gb); |
| if (val) |
| dst[pos] = val; |
| pos++; |
| } |
| } |
| } |
| dst += ctx->pitch; |
| } |
| ctx->rotate_code = 0; |
| |
| return 0; |
| } |
| |
| static inline void codec37_mv(uint8_t *dst, const uint8_t *src, |
| int height, int stride, int x, int y) |
| { |
| int pos, i, j; |
| |
| pos = x + y * stride; |
| for (j = 0; j < 4; j++) { |
| for (i = 0; i < 4; i++) { |
| if ((pos + i) < 0 || (pos + i) >= height * stride) |
| dst[i] = 0; |
| else |
| dst[i] = src[i]; |
| } |
| dst += stride; |
| src += stride; |
| pos += stride; |
| } |
| } |
| |
| static int old_codec37(SANMVideoContext *ctx, int top, |
| int left, int width, int height) |
| { |
| ptrdiff_t stride = ctx->pitch; |
| int i, j, k, t; |
| uint8_t *dst, *prev; |
| int skip_run = 0; |
| int compr = bytestream2_get_byte(&ctx->gb); |
| int mvoff = bytestream2_get_byte(&ctx->gb); |
| int seq = bytestream2_get_le16(&ctx->gb); |
| uint32_t decoded_size = bytestream2_get_le32(&ctx->gb); |
| int flags; |
| |
| bytestream2_skip(&ctx->gb, 4); |
| flags = bytestream2_get_byte(&ctx->gb); |
| bytestream2_skip(&ctx->gb, 3); |
| |
| if (decoded_size > ctx->height * stride - left - top * stride) { |
| decoded_size = ctx->height * stride - left - top * stride; |
| av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n"); |
| } |
| |
| ctx->rotate_code = 0; |
| |
| if (((seq & 1) || !(flags & 1)) && (compr && compr != 2)) |
| rotate_bufs(ctx, 1); |
| |
| dst = ((uint8_t*)ctx->frm0) + left + top * stride; |
| prev = ((uint8_t*)ctx->frm2) + left + top * stride; |
| |
| if (mvoff > 2) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvoff); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| switch (compr) { |
| case 0: |
| for (i = 0; i < height; i++) { |
| bytestream2_get_buffer(&ctx->gb, dst, width); |
| dst += stride; |
| } |
| memset(ctx->frm1, 0, ctx->height * stride); |
| memset(ctx->frm2, 0, ctx->height * stride); |
| break; |
| case 2: |
| if (rle_decode(ctx, dst, decoded_size)) |
| return AVERROR_INVALIDDATA; |
| memset(ctx->frm1, 0, ctx->frm1_size); |
| memset(ctx->frm2, 0, ctx->frm2_size); |
| break; |
| case 3: |
| case 4: |
| if (flags & 4) { |
| for (j = 0; j < height; j += 4) { |
| for (i = 0; i < width; i += 4) { |
| int code; |
| if (skip_run) { |
| skip_run--; |
| copy_block4(dst + i, prev + i, stride, stride, 4); |
| continue; |
| } |
| if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| code = bytestream2_get_byteu(&ctx->gb); |
| switch (code) { |
| case 0xFF: |
| if (bytestream2_get_bytes_left(&ctx->gb) < 16) |
| return AVERROR_INVALIDDATA; |
| for (k = 0; k < 4; k++) |
| bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4); |
| break; |
| case 0xFE: |
| if (bytestream2_get_bytes_left(&ctx->gb) < 4) |
| return AVERROR_INVALIDDATA; |
| for (k = 0; k < 4; k++) |
| memset(dst + i + k * stride, bytestream2_get_byteu(&ctx->gb), 4); |
| break; |
| case 0xFD: |
| if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| t = bytestream2_get_byteu(&ctx->gb); |
| for (k = 0; k < 4; k++) |
| memset(dst + i + k * stride, t, 4); |
| break; |
| default: |
| if (compr == 4 && !code) { |
| if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| skip_run = bytestream2_get_byteu(&ctx->gb) + 1; |
| i -= 4; |
| } else { |
| int mx, my; |
| |
| mx = c37_mv[(mvoff * 255 + code) * 2]; |
| my = c37_mv[(mvoff * 255 + code) * 2 + 1]; |
| codec37_mv(dst + i, prev + i + mx + my * stride, |
| ctx->height, stride, i + mx, j + my); |
| } |
| } |
| } |
| dst += stride * 4; |
| prev += stride * 4; |
| } |
| } else { |
| for (j = 0; j < height; j += 4) { |
| for (i = 0; i < width; i += 4) { |
| int code; |
| if (skip_run) { |
| skip_run--; |
| copy_block4(dst + i, prev + i, stride, stride, 4); |
| continue; |
| } |
| code = bytestream2_get_byte(&ctx->gb); |
| if (code == 0xFF) { |
| if (bytestream2_get_bytes_left(&ctx->gb) < 16) |
| return AVERROR_INVALIDDATA; |
| for (k = 0; k < 4; k++) |
| bytestream2_get_bufferu(&ctx->gb, dst + i + k * stride, 4); |
| } else if (compr == 4 && !code) { |
| if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| skip_run = bytestream2_get_byteu(&ctx->gb) + 1; |
| i -= 4; |
| } else { |
| int mx, my; |
| |
| mx = c37_mv[(mvoff * 255 + code) * 2]; |
| my = c37_mv[(mvoff * 255 + code) * 2 + 1]; |
| codec37_mv(dst + i, prev + i + mx + my * stride, |
| ctx->height, stride, i + mx, j + my); |
| } |
| } |
| dst += stride * 4; |
| prev += stride * 4; |
| } |
| } |
| break; |
| default: |
| avpriv_report_missing_feature(ctx->avctx, |
| "Subcodec 37 compression %d", compr); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| return 0; |
| } |
| |
| static int process_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *prev1, |
| uint8_t *prev2, int stride, int tbl, int size) |
| { |
| int code, k, t; |
| uint8_t colors[2]; |
| int8_t *pglyph; |
| |
| if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| |
| code = bytestream2_get_byteu(&ctx->gb); |
| if (code >= 0xF8) { |
| switch (code) { |
| case 0xFF: |
| if (size == 2) { |
| if (bytestream2_get_bytes_left(&ctx->gb) < 4) |
| return AVERROR_INVALIDDATA; |
| dst[0] = bytestream2_get_byteu(&ctx->gb); |
| dst[1] = bytestream2_get_byteu(&ctx->gb); |
| dst[0 + stride] = bytestream2_get_byteu(&ctx->gb); |
| dst[1 + stride] = bytestream2_get_byteu(&ctx->gb); |
| } else { |
| size >>= 1; |
| if (process_block(ctx, dst, prev1, prev2, stride, tbl, size)) |
| return AVERROR_INVALIDDATA; |
| if (process_block(ctx, dst + size, prev1 + size, prev2 + size, |
| stride, tbl, size)) |
| return AVERROR_INVALIDDATA; |
| dst += size * stride; |
| prev1 += size * stride; |
| prev2 += size * stride; |
| if (process_block(ctx, dst, prev1, prev2, stride, tbl, size)) |
| return AVERROR_INVALIDDATA; |
| if (process_block(ctx, dst + size, prev1 + size, prev2 + size, |
| stride, tbl, size)) |
| return AVERROR_INVALIDDATA; |
| } |
| break; |
| case 0xFE: |
| if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| |
| t = bytestream2_get_byteu(&ctx->gb); |
| for (k = 0; k < size; k++) |
| memset(dst + k * stride, t, size); |
| break; |
| case 0xFD: |
| if (bytestream2_get_bytes_left(&ctx->gb) < 3) |
| return AVERROR_INVALIDDATA; |
| |
| code = bytestream2_get_byteu(&ctx->gb); |
| pglyph = (size == 8) ? ctx->p8x8glyphs[code] : ctx->p4x4glyphs[code]; |
| bytestream2_get_bufferu(&ctx->gb, colors, 2); |
| |
| for (k = 0; k < size; k++) |
| for (t = 0; t < size; t++) |
| dst[t + k * stride] = colors[!*pglyph++]; |
| break; |
| case 0xFC: |
| for (k = 0; k < size; k++) |
| memcpy(dst + k * stride, prev1 + k * stride, size); |
| break; |
| default: |
| k = bytestream2_tell(&ctx->gb); |
| bytestream2_seek(&ctx->gb, tbl + (code & 7), SEEK_SET); |
| t = bytestream2_get_byte(&ctx->gb); |
| bytestream2_seek(&ctx->gb, k, SEEK_SET); |
| for (k = 0; k < size; k++) |
| memset(dst + k * stride, t, size); |
| } |
| } else { |
| int mx = motion_vectors[code][0]; |
| int my = motion_vectors[code][1]; |
| int index = prev2 - (const uint8_t *)ctx->frm2; |
| |
| av_assert2(index >= 0 && index < (ctx->buf_size >> 1)); |
| |
| if (index < -mx - my * stride || |
| (ctx->buf_size >> 1) - index < mx + size + (my + size - 1) * stride) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "MV is invalid.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| for (k = 0; k < size; k++) |
| memcpy(dst + k * stride, prev2 + mx + (my + k) * stride, size); |
| } |
| |
| return 0; |
| } |
| |
| static int old_codec47(SANMVideoContext *ctx, int top, |
| int left, int width, int height) |
| { |
| uint32_t decoded_size; |
| int i, j; |
| ptrdiff_t stride = ctx->pitch; |
| uint8_t *dst = (uint8_t *)ctx->frm0 + left + top * stride; |
| uint8_t *prev1 = (uint8_t *)ctx->frm1; |
| uint8_t *prev2 = (uint8_t *)ctx->frm2; |
| int tbl_pos = bytestream2_tell(&ctx->gb); |
| int seq = bytestream2_get_le16(&ctx->gb); |
| int compr = bytestream2_get_byte(&ctx->gb); |
| int new_rot = bytestream2_get_byte(&ctx->gb); |
| int skip = bytestream2_get_byte(&ctx->gb); |
| |
| bytestream2_skip(&ctx->gb, 9); |
| decoded_size = bytestream2_get_le32(&ctx->gb); |
| bytestream2_skip(&ctx->gb, 8); |
| |
| if (decoded_size > ctx->height * stride - left - top * stride) { |
| decoded_size = ctx->height * stride - left - top * stride; |
| av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n"); |
| } |
| |
| if (skip & 1) |
| bytestream2_skip(&ctx->gb, 0x8080); |
| if (!seq) { |
| ctx->prev_seq = -1; |
| memset(prev1, 0, ctx->height * stride); |
| memset(prev2, 0, ctx->height * stride); |
| } |
| |
| switch (compr) { |
| case 0: |
| if (bytestream2_get_bytes_left(&ctx->gb) < width * height) |
| return AVERROR_INVALIDDATA; |
| for (j = 0; j < height; j++) { |
| bytestream2_get_bufferu(&ctx->gb, dst, width); |
| dst += stride; |
| } |
| break; |
| case 1: |
| if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1)) |
| return AVERROR_INVALIDDATA; |
| for (j = 0; j < height; j += 2) { |
| for (i = 0; i < width; i += 2) { |
| dst[i] = |
| dst[i + 1] = |
| dst[stride + i] = |
| dst[stride + i + 1] = bytestream2_get_byteu(&ctx->gb); |
| } |
| dst += stride * 2; |
| } |
| break; |
| case 2: |
| if (seq == ctx->prev_seq + 1) { |
| for (j = 0; j < height; j += 8) { |
| for (i = 0; i < width; i += 8) |
| if (process_block(ctx, dst + i, prev1 + i, prev2 + i, stride, |
| tbl_pos + 8, 8)) |
| return AVERROR_INVALIDDATA; |
| dst += stride * 8; |
| prev1 += stride * 8; |
| prev2 += stride * 8; |
| } |
| } |
| break; |
| case 3: |
| memcpy(ctx->frm0, ctx->frm2, ctx->pitch * ctx->height); |
| break; |
| case 4: |
| memcpy(ctx->frm0, ctx->frm1, ctx->pitch * ctx->height); |
| break; |
| case 5: |
| if (rle_decode(ctx, dst, decoded_size)) |
| return AVERROR_INVALIDDATA; |
| break; |
| default: |
| avpriv_report_missing_feature(ctx->avctx, |
| "Subcodec 47 compression %d", compr); |
| return AVERROR_PATCHWELCOME; |
| } |
| if (seq == ctx->prev_seq + 1) |
| ctx->rotate_code = new_rot; |
| else |
| ctx->rotate_code = 0; |
| ctx->prev_seq = seq; |
| |
| return 0; |
| } |
| |
| static int process_frame_obj(SANMVideoContext *ctx) |
| { |
| uint16_t codec = bytestream2_get_le16u(&ctx->gb); |
| uint16_t left = bytestream2_get_le16u(&ctx->gb); |
| uint16_t top = bytestream2_get_le16u(&ctx->gb); |
| uint16_t w = bytestream2_get_le16u(&ctx->gb); |
| uint16_t h = bytestream2_get_le16u(&ctx->gb); |
| |
| if (!w || !h) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Dimensions are invalid.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| if (ctx->width < left + w || ctx->height < top + h) { |
| int ret = ff_set_dimensions(ctx->avctx, FFMAX(left + w, ctx->width), |
| FFMAX(top + h, ctx->height)); |
| if (ret < 0) |
| return ret; |
| init_sizes(ctx, FFMAX(left + w, ctx->width), |
| FFMAX(top + h, ctx->height)); |
| if (init_buffers(ctx)) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Error resizing buffers.\n"); |
| return AVERROR(ENOMEM); |
| } |
| } |
| bytestream2_skip(&ctx->gb, 4); |
| |
| switch (codec) { |
| case 1: |
| case 3: |
| return old_codec1(ctx, top, left, w, h); |
| case 37: |
| return old_codec37(ctx, top, left, w, h); |
| case 47: |
| return old_codec47(ctx, top, left, w, h); |
| default: |
| avpriv_request_sample(ctx->avctx, "Subcodec %d", codec); |
| return AVERROR_PATCHWELCOME; |
| } |
| } |
| |
| static int decode_0(SANMVideoContext *ctx) |
| { |
| uint16_t *frm = ctx->frm0; |
| int x, y; |
| |
| if (bytestream2_get_bytes_left(&ctx->gb) < ctx->width * ctx->height * 2) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for raw frame.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| for (y = 0; y < ctx->height; y++) { |
| for (x = 0; x < ctx->width; x++) |
| frm[x] = bytestream2_get_le16u(&ctx->gb); |
| frm += ctx->pitch; |
| } |
| return 0; |
| } |
| |
| static int decode_nop(SANMVideoContext *ctx) |
| { |
| avpriv_request_sample(ctx->avctx, "Unknown/unsupported compression type"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| static void copy_block(uint16_t *pdest, uint16_t *psrc, int block_size, ptrdiff_t pitch) |
| { |
| uint8_t *dst = (uint8_t *)pdest; |
| uint8_t *src = (uint8_t *)psrc; |
| ptrdiff_t stride = pitch * 2; |
| |
| switch (block_size) { |
| case 2: |
| copy_block4(dst, src, stride, stride, 2); |
| break; |
| case 4: |
| copy_block8(dst, src, stride, stride, 4); |
| break; |
| case 8: |
| copy_block16(dst, src, stride, stride, 8); |
| break; |
| } |
| } |
| |
| static void fill_block(uint16_t *pdest, uint16_t color, int block_size, ptrdiff_t pitch) |
| { |
| int x, y; |
| |
| pitch -= block_size; |
| for (y = 0; y < block_size; y++, pdest += pitch) |
| for (x = 0; x < block_size; x++) |
| *pdest++ = color; |
| } |
| |
| static int draw_glyph(SANMVideoContext *ctx, uint16_t *dst, int index, |
| uint16_t fg_color, uint16_t bg_color, int block_size, |
| ptrdiff_t pitch) |
| { |
| int8_t *pglyph; |
| uint16_t colors[2] = { fg_color, bg_color }; |
| int x, y; |
| |
| if (index >= NGLYPHS) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Ignoring nonexistent glyph #%u.\n", index); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| pglyph = block_size == 8 ? ctx->p8x8glyphs[index] : ctx->p4x4glyphs[index]; |
| pitch -= block_size; |
| |
| for (y = 0; y < block_size; y++, dst += pitch) |
| for (x = 0; x < block_size; x++) |
| *dst++ = colors[*pglyph++]; |
| return 0; |
| } |
| |
| static int opcode_0xf7(SANMVideoContext *ctx, int cx, int cy, int block_size, ptrdiff_t pitch) |
| { |
| uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch; |
| |
| if (block_size == 2) { |
| uint32_t indices; |
| |
| if (bytestream2_get_bytes_left(&ctx->gb) < 4) |
| return AVERROR_INVALIDDATA; |
| |
| indices = bytestream2_get_le32u(&ctx->gb); |
| dst[0] = ctx->codebook[indices & 0xFF]; |
| indices >>= 8; |
| dst[1] = ctx->codebook[indices & 0xFF]; |
| indices >>= 8; |
| dst[pitch] = ctx->codebook[indices & 0xFF]; |
| indices >>= 8; |
| dst[pitch + 1] = ctx->codebook[indices & 0xFF]; |
| } else { |
| uint16_t fgcolor, bgcolor; |
| int glyph; |
| |
| if (bytestream2_get_bytes_left(&ctx->gb) < 3) |
| return AVERROR_INVALIDDATA; |
| |
| glyph = bytestream2_get_byteu(&ctx->gb); |
| bgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; |
| fgcolor = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; |
| |
| draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch); |
| } |
| return 0; |
| } |
| |
| static int opcode_0xf8(SANMVideoContext *ctx, int cx, int cy, int block_size, ptrdiff_t pitch) |
| { |
| uint16_t *dst = ctx->frm0 + cx + cy * ctx->pitch; |
| |
| if (block_size == 2) { |
| if (bytestream2_get_bytes_left(&ctx->gb) < 8) |
| return AVERROR_INVALIDDATA; |
| |
| dst[0] = bytestream2_get_le16u(&ctx->gb); |
| dst[1] = bytestream2_get_le16u(&ctx->gb); |
| dst[pitch] = bytestream2_get_le16u(&ctx->gb); |
| dst[pitch + 1] = bytestream2_get_le16u(&ctx->gb); |
| } else { |
| uint16_t fgcolor, bgcolor; |
| int glyph; |
| |
| if (bytestream2_get_bytes_left(&ctx->gb) < 5) |
| return AVERROR_INVALIDDATA; |
| |
| glyph = bytestream2_get_byteu(&ctx->gb); |
| bgcolor = bytestream2_get_le16u(&ctx->gb); |
| fgcolor = bytestream2_get_le16u(&ctx->gb); |
| |
| draw_glyph(ctx, dst, glyph, fgcolor, bgcolor, block_size, pitch); |
| } |
| return 0; |
| } |
| |
| static int good_mvec(SANMVideoContext *ctx, int cx, int cy, int mx, int my, |
| int block_size) |
| { |
| int start_pos = cx + mx + (cy + my) * ctx->pitch; |
| int end_pos = start_pos + (block_size - 1) * (ctx->pitch + 1); |
| |
| int good = start_pos >= 0 && end_pos < (ctx->buf_size >> 1); |
| |
| if (!good) |
| av_log(ctx->avctx, AV_LOG_ERROR, |
| "Ignoring invalid motion vector (%i, %i)->(%u, %u), block size = %u\n", |
| cx + mx, cy + my, cx, cy, block_size); |
| |
| return good; |
| } |
| |
| static int codec2subblock(SANMVideoContext *ctx, int cx, int cy, int blk_size) |
| { |
| int16_t mx, my, index; |
| int opcode; |
| |
| if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| |
| opcode = bytestream2_get_byteu(&ctx->gb); |
| |
| switch (opcode) { |
| default: |
| mx = motion_vectors[opcode][0]; |
| my = motion_vectors[opcode][1]; |
| |
| if (good_mvec(ctx, cx, cy, mx, my, blk_size)) { |
| copy_block(ctx->frm0 + cx + ctx->pitch * cy, |
| ctx->frm2 + cx + mx + ctx->pitch * (cy + my), |
| blk_size, ctx->pitch); |
| } |
| break; |
| case 0xF5: |
| if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
| return AVERROR_INVALIDDATA; |
| index = bytestream2_get_le16u(&ctx->gb); |
| |
| mx = index % ctx->width; |
| my = index / ctx->width; |
| |
| if (good_mvec(ctx, cx, cy, mx, my, blk_size)) { |
| copy_block(ctx->frm0 + cx + ctx->pitch * cy, |
| ctx->frm2 + cx + mx + ctx->pitch * (cy + my), |
| blk_size, ctx->pitch); |
| } |
| break; |
| case 0xF6: |
| copy_block(ctx->frm0 + cx + ctx->pitch * cy, |
| ctx->frm1 + cx + ctx->pitch * cy, |
| blk_size, ctx->pitch); |
| break; |
| case 0xF7: |
| opcode_0xf7(ctx, cx, cy, blk_size, ctx->pitch); |
| break; |
| |
| case 0xF8: |
| opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch); |
| break; |
| case 0xF9: |
| case 0xFA: |
| case 0xFB: |
| case 0xFC: |
| fill_block(ctx->frm0 + cx + cy * ctx->pitch, |
| ctx->small_codebook[opcode - 0xf9], blk_size, ctx->pitch); |
| break; |
| case 0xFD: |
| if (bytestream2_get_bytes_left(&ctx->gb) < 1) |
| return AVERROR_INVALIDDATA; |
| fill_block(ctx->frm0 + cx + cy * ctx->pitch, |
| ctx->codebook[bytestream2_get_byteu(&ctx->gb)], blk_size, ctx->pitch); |
| break; |
| case 0xFE: |
| if (bytestream2_get_bytes_left(&ctx->gb) < 2) |
| return AVERROR_INVALIDDATA; |
| fill_block(ctx->frm0 + cx + cy * ctx->pitch, |
| bytestream2_get_le16u(&ctx->gb), blk_size, ctx->pitch); |
| break; |
| case 0xFF: |
| if (blk_size == 2) { |
| opcode_0xf8(ctx, cx, cy, blk_size, ctx->pitch); |
| } else { |
| blk_size >>= 1; |
| if (codec2subblock(ctx, cx, cy, blk_size)) |
| return AVERROR_INVALIDDATA; |
| if (codec2subblock(ctx, cx + blk_size, cy, blk_size)) |
| return AVERROR_INVALIDDATA; |
| if (codec2subblock(ctx, cx, cy + blk_size, blk_size)) |
| return AVERROR_INVALIDDATA; |
| if (codec2subblock(ctx, cx + blk_size, cy + blk_size, blk_size)) |
| return AVERROR_INVALIDDATA; |
| } |
| break; |
| } |
| return 0; |
| } |
| |
| static int decode_2(SANMVideoContext *ctx) |
| { |
| int cx, cy, ret; |
| |
| for (cy = 0; cy < ctx->aligned_height; cy += 8) |
| for (cx = 0; cx < ctx->aligned_width; cx += 8) |
| if (ret = codec2subblock(ctx, cx, cy, 8)) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int decode_3(SANMVideoContext *ctx) |
| { |
| memcpy(ctx->frm0, ctx->frm2, ctx->frm2_size); |
| return 0; |
| } |
| |
| static int decode_4(SANMVideoContext *ctx) |
| { |
| memcpy(ctx->frm0, ctx->frm1, ctx->frm1_size); |
| return 0; |
| } |
| |
| static int decode_5(SANMVideoContext *ctx) |
| { |
| #if HAVE_BIGENDIAN |
| uint16_t *frm; |
| int npixels; |
| #endif |
| uint8_t *dst = (uint8_t*)ctx->frm0; |
| |
| if (rle_decode(ctx, dst, ctx->buf_size)) |
| return AVERROR_INVALIDDATA; |
| |
| #if HAVE_BIGENDIAN |
| npixels = ctx->npixels; |
| frm = ctx->frm0; |
| while (npixels--) { |
| *frm = av_bswap16(*frm); |
| frm++; |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| static int decode_6(SANMVideoContext *ctx) |
| { |
| int npixels = ctx->npixels; |
| uint16_t *frm = ctx->frm0; |
| |
| if (bytestream2_get_bytes_left(&ctx->gb) < npixels) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Insufficient data for frame.\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| while (npixels--) |
| *frm++ = ctx->codebook[bytestream2_get_byteu(&ctx->gb)]; |
| |
| return 0; |
| } |
| |
| static int decode_8(SANMVideoContext *ctx) |
| { |
| uint16_t *pdest = ctx->frm0; |
| uint8_t *rsrc; |
| long npixels = ctx->npixels; |
| |
| av_fast_malloc(&ctx->rle_buf, &ctx->rle_buf_size, npixels); |
| if (!ctx->rle_buf) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "RLE buffer allocation failed.\n"); |
| return AVERROR(ENOMEM); |
| } |
| rsrc = ctx->rle_buf; |
| |
| if (rle_decode(ctx, rsrc, npixels)) |
| return AVERROR_INVALIDDATA; |
| |
| while (npixels--) |
| *pdest++ = ctx->codebook[*rsrc++]; |
| |
| return 0; |
| } |
| |
| typedef int (*frm_decoder)(SANMVideoContext *ctx); |
| |
| static const frm_decoder v1_decoders[] = { |
| decode_0, decode_nop, decode_2, decode_3, decode_4, decode_5, |
| decode_6, decode_nop, decode_8 |
| }; |
| |
| static int read_frame_header(SANMVideoContext *ctx, SANMFrameHeader *hdr) |
| { |
| int i, ret; |
| |
| if ((ret = bytestream2_get_bytes_left(&ctx->gb)) < 560) { |
| av_log(ctx->avctx, AV_LOG_ERROR, "Input frame too short (%d bytes).\n", |
| ret); |
| return AVERROR_INVALIDDATA; |
| } |
| bytestream2_skip(&ctx->gb, 8); // skip pad |
| |
| hdr->width = bytestream2_get_le32u(&ctx->gb); |
| hdr->height = bytestream2_get_le32u(&ctx->gb); |
| |
| if (hdr->width != ctx->width || hdr->height != ctx->height) { |
| avpriv_report_missing_feature(ctx->avctx, "Variable size frames"); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| hdr->seq_num = bytestream2_get_le16u(&ctx->gb); |
| hdr->codec = bytestream2_get_byteu(&ctx->gb); |
| hdr->rotate_code = bytestream2_get_byteu(&ctx->gb); |
| |
| bytestream2_skip(&ctx->gb, 4); // skip pad |
| |
| for (i = 0; i < 4; i++) |
| ctx->small_codebook[i] = bytestream2_get_le16u(&ctx->gb); |
| hdr->bg_color = bytestream2_get_le16u(&ctx->gb); |
| |
| bytestream2_skip(&ctx->gb, 2); // skip pad |
| |
| hdr->rle_output_size = bytestream2_get_le32u(&ctx->gb); |
| for (i = 0; i < 256; i++) |
| ctx->codebook[i] = bytestream2_get_le16u(&ctx->gb); |
| |
| bytestream2_skip(&ctx->gb, 8); // skip pad |
| |
| return 0; |
| } |
| |
| static void fill_frame(uint16_t *pbuf, int buf_size, uint16_t color) |
| { |
| if (buf_size--) { |
| *pbuf++ = color; |
| av_memcpy_backptr((uint8_t*)pbuf, 2, 2*buf_size); |
| } |
| } |
| |
| static int copy_output(SANMVideoContext *ctx, SANMFrameHeader *hdr) |
| { |
| uint8_t *dst; |
| const uint8_t *src = (uint8_t*) ctx->frm0; |
| int ret, height = ctx->height; |
| ptrdiff_t dstpitch, srcpitch = ctx->pitch * (hdr ? sizeof(ctx->frm0[0]) : 1); |
| |
| if ((ret = ff_get_buffer(ctx->avctx, ctx->frame, 0)) < 0) |
| return ret; |
| |
| dst = ctx->frame->data[0]; |
| dstpitch = ctx->frame->linesize[0]; |
| |
| while (height--) { |
| memcpy(dst, src, srcpitch); |
| src += srcpitch; |
| dst += dstpitch; |
| } |
| |
| return 0; |
| } |
| |
| static int decode_frame(AVCodecContext *avctx, void *data, |
| int *got_frame_ptr, AVPacket *pkt) |
| { |
| SANMVideoContext *ctx = avctx->priv_data; |
| int i, ret; |
| |
| ctx->frame = data; |
| bytestream2_init(&ctx->gb, pkt->data, pkt->size); |
| |
| if (!ctx->version) { |
| int to_store = 0; |
| |
| while (bytestream2_get_bytes_left(&ctx->gb) >= 8) { |
| uint32_t sig, size; |
| int pos; |
| |
| sig = bytestream2_get_be32u(&ctx->gb); |
| size = bytestream2_get_be32u(&ctx->gb); |
| pos = bytestream2_tell(&ctx->gb); |
| |
| if (bytestream2_get_bytes_left(&ctx->gb) < size) { |
| av_log(avctx, AV_LOG_ERROR, "Incorrect chunk size %"PRIu32".\n", size); |
| break; |
| } |
| switch (sig) { |
| case MKBETAG('N', 'P', 'A', 'L'): |
| if (size != PALETTE_SIZE * 3) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Incorrect palette block size %"PRIu32".\n", size); |
| return AVERROR_INVALIDDATA; |
| } |
| for (i = 0; i < PALETTE_SIZE; i++) |
| ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb); |
| break; |
| case MKBETAG('F', 'O', 'B', 'J'): |
| if (size < 16) |
| return AVERROR_INVALIDDATA; |
| if (ret = process_frame_obj(ctx)) |
| return ret; |
| break; |
| case MKBETAG('X', 'P', 'A', 'L'): |
| if (size == 6 || size == 4) { |
| uint8_t tmp[3]; |
| int j; |
| |
| for (i = 0; i < PALETTE_SIZE; i++) { |
| for (j = 0; j < 3; j++) { |
| int t = (ctx->pal[i] >> (16 - j * 8)) & 0xFF; |
| tmp[j] = av_clip_uint8((t * 129 + ctx->delta_pal[i * 3 + j]) >> 7); |
| } |
| ctx->pal[i] = 0xFFU << 24 | AV_RB24(tmp); |
| } |
| } else { |
| if (size < PALETTE_DELTA * 2 + 4) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Incorrect palette change block size %"PRIu32".\n", |
| size); |
| return AVERROR_INVALIDDATA; |
| } |
| bytestream2_skipu(&ctx->gb, 4); |
| for (i = 0; i < PALETTE_DELTA; i++) |
| ctx->delta_pal[i] = bytestream2_get_le16u(&ctx->gb); |
| if (size >= PALETTE_DELTA * 5 + 4) { |
| for (i = 0; i < PALETTE_SIZE; i++) |
| ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb); |
| } else { |
| memset(ctx->pal, 0, sizeof(ctx->pal)); |
| } |
| } |
| break; |
| case MKBETAG('S', 'T', 'O', 'R'): |
| to_store = 1; |
| break; |
| case MKBETAG('F', 'T', 'C', 'H'): |
| memcpy(ctx->frm0, ctx->stored_frame, ctx->buf_size); |
| break; |
| default: |
| bytestream2_skip(&ctx->gb, size); |
| av_log(avctx, AV_LOG_DEBUG, |
| "Unknown/unsupported chunk %"PRIx32".\n", sig); |
| break; |
| } |
| |
| bytestream2_seek(&ctx->gb, pos + size, SEEK_SET); |
| if (size & 1) |
| bytestream2_skip(&ctx->gb, 1); |
| } |
| if (to_store) |
| memcpy(ctx->stored_frame, ctx->frm0, ctx->buf_size); |
| if ((ret = copy_output(ctx, NULL))) |
| return ret; |
| memcpy(ctx->frame->data[1], ctx->pal, 1024); |
| } else { |
| SANMFrameHeader header; |
| |
| if ((ret = read_frame_header(ctx, &header))) |
| return ret; |
| |
| ctx->rotate_code = header.rotate_code; |
| if ((ctx->frame->key_frame = !header.seq_num)) { |
| ctx->frame->pict_type = AV_PICTURE_TYPE_I; |
| fill_frame(ctx->frm1, ctx->npixels, header.bg_color); |
| fill_frame(ctx->frm2, ctx->npixels, header.bg_color); |
| } else { |
| ctx->frame->pict_type = AV_PICTURE_TYPE_P; |
| } |
| |
| if (header.codec < FF_ARRAY_ELEMS(v1_decoders)) { |
| if ((ret = v1_decoders[header.codec](ctx))) { |
| av_log(avctx, AV_LOG_ERROR, |
| "Subcodec %d: error decoding frame.\n", header.codec); |
| return ret; |
| } |
| } else { |
| avpriv_request_sample(avctx, "Subcodec %d", header.codec); |
| return AVERROR_PATCHWELCOME; |
| } |
| |
| if ((ret = copy_output(ctx, &header))) |
| return ret; |
| } |
| if (ctx->rotate_code) |
| rotate_bufs(ctx, ctx->rotate_code); |
| |
| *got_frame_ptr = 1; |
| |
| return pkt->size; |
| } |
| |
| AVCodec ff_sanm_decoder = { |
| .name = "sanm", |
| .long_name = NULL_IF_CONFIG_SMALL("LucasArts SANM/Smush video"), |
| .type = AVMEDIA_TYPE_VIDEO, |
| .id = AV_CODEC_ID_SANM, |
| .priv_data_size = sizeof(SANMVideoContext), |
| .init = decode_init, |
| .close = decode_end, |
| .decode = decode_frame, |
| .capabilities = AV_CODEC_CAP_DR1, |
| }; |
