/* * 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/mem.h" #include "avcodec.h" #include "bytestream.h" #include "copy_block.h" #include "codec_internal.h" #include "decode.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, have_dimensions, first_fob; 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 *fbuf, *frm0, *frm1, *frm2; uint8_t *stored_frame; uint32_t fbuf_size, frm0_size, frm1_size, frm2_size; uint32_t stor_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]; uint8_t c47itbl[0x10000]; uint8_t c23lut[256]; uint8_t c4tbl[2][256][16]; uint16_t c4param; } 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->fbuf); 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->fbuf, &ctx->fbuf_size, ctx->buf_size); 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); ctx->stor_size = 0; } if (!ctx->frm0 || !ctx->frm1 || !ctx->frm2 || (!ctx->stored_frame && !ctx->version)) { destroy_buffers(ctx); return AVERROR(ENOMEM); } return 0; } static void codec33_gen_tiles(SANMVideoContext *ctx, int8_t param1) { uint8_t *dst = &(ctx->c4tbl[0][0][0]); int i, j, k, l, m, n, o, p; for (i = 0; i < 8; i++) { for (k = 0; k < 8; k++) { j = i + param1; l = k + param1; p = (j + l) >> 1; n = (j + p) >> 1; m = (p + l) >> 1; *dst++ = p; *dst++ = p; *dst++ = n; *dst++ = j; *dst++ = p; *dst++ = p; *dst++ = n; *dst++ = j; *dst++ = m; *dst++ = m; *dst++ = p; *dst++ = j; *dst++ = l; *dst++ = l; *dst++ = m; *dst++ = p; } } for (i = 0; i < 8; i++) { for (k = 0; k < 8; k++) { j = i + param1; l = k + param1; n = (j + l) >> 1; m = (l + n) >> 1; *dst++ = j; *dst++ = j; *dst++ = j; *dst++ = j; *dst++ = n; *dst++ = n; *dst++ = n; *dst++ = n; *dst++ = m; *dst++ = m; *dst++ = m; *dst++ = m; *dst++ = l; *dst++ = l; *dst++ = l; *dst++ = l; } } for (i = 0; i < 8; i++) { for (k = 0; k < 8; k++) { j = i + param1; l = k + param1; m = (j + l) >> 1; n = (j + m) >> 1; o = (l + m) >> 1; *dst++ = j; *dst++ = j; *dst++ = n; *dst++ = m; *dst++ = j; *dst++ = j; *dst++ = n; *dst++ = m; *dst++ = n; *dst++ = n; *dst++ = m; *dst++ = o; *dst++ = m; *dst++ = m; *dst++ = o; *dst++ = l; } } for (i = 0; i < 8; i++) { for (k = 0; k < 8; k++) { j = i + param1; l = k + param1; m = (j + l) >> 1; n = (l + m) >> 1; *dst++ = j; *dst++ = m; *dst++ = n; *dst++ = l; *dst++ = j; *dst++ = m; *dst++ = n; *dst++ = l; *dst++ = j; *dst++ = m; *dst++ = n; *dst++ = l; *dst++ = j; *dst++ = m; *dst++ = n; *dst++ = l; } } } static void codec4_gen_tiles(SANMVideoContext *ctx, uint16_t param1) { uint8_t *dst = &(ctx->c4tbl[0][0][0]); int i, j, k, l, m, n, o; for (i = 1; i < 16; i += 2) { for (k = 0; k < 16; k++) { j = i + param1; l = k + param1; m = (j + l) / 2; n = (j + m) / 2; o = (l + m) / 2; if (j == m || l == m) { *dst++ = l; *dst++ = j; *dst++ = l; *dst++ = j; *dst++ = j; *dst++ = l; *dst++ = j; *dst++ = j; *dst++ = l; *dst++ = j; *dst++ = l; *dst++ = j; *dst++ = l; *dst++ = l; *dst++ = j; *dst++ = l; } else { *dst++ = m; *dst++ = m; *dst++ = n; *dst++ = j; *dst++ = m; *dst++ = m; *dst++ = n; *dst++ = j; *dst++ = o; *dst++ = o; *dst++ = m; *dst++ = n; *dst++ = l; *dst++ = l; *dst++ = o; *dst++ = m; } } } for (i = 0; i < 16; i += 2) { for (k = 0; k < 16; k++) { j = i + param1; l = k + param1; m = (j + l) / 2; n = (j + m) / 2; o = (l + m) / 2; if (m == j || m == l) { *dst++ = j; *dst++ = j; *dst++ = l; *dst++ = j; *dst++ = j; *dst++ = j; *dst++ = j; *dst++ = l; *dst++ = l; *dst++ = j; *dst++ = l; *dst++ = l; *dst++ = j; *dst++ = l; *dst++ = j; *dst++ = l; } else { *dst++ = j; *dst++ = j; *dst++ = n; *dst++ = m; *dst++ = j; *dst++ = j; *dst++ = n; *dst++ = m; *dst++ = n; *dst++ = n; *dst++ = m; *dst++ = o; *dst++ = m; *dst++ = m; *dst++ = o; *dst++ = l; } } } } static int codec4_load_tiles(SANMVideoContext *ctx, GetByteContext *gb, uint16_t param2, uint8_t clr) { uint8_t c, *dst = (uint8_t *)&(ctx->c4tbl[1][0][0]); uint32_t loop = param2 * 8; if ((param2 > 256) || (bytestream2_get_bytes_left(gb) < loop)) return AVERROR_INVALIDDATA; while (loop--) { c = bytestream2_get_byteu(gb); *dst++ = (c >> 4) + clr; *dst++ = (c & 0xf) + clr; } 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); if (ctx->subversion < 2) ctx->pal[0] = 0xFFU << 24; } ctx->c4param = 0xffff; return 0; } static av_cold int decode_end(AVCodecContext *avctx) { SANMVideoContext *ctx = avctx->priv_data; destroy_buffers(ctx); return 0; } static int old_codec4(SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int w, int h, uint8_t param, uint16_t param2, int codec) { const uint16_t p = ctx->pitch; const uint32_t maxpxo = ctx->height * p; uint8_t mask, bits, idx, *gs, *dst = (uint8_t *)ctx->fbuf; int i, j, k, l, bit, ret; int32_t pxoff, pxo2; if (ctx->c4param != param) { if (codec > 32) codec33_gen_tiles(ctx, param); else codec4_gen_tiles(ctx, param); ctx->c4param = param; } if (param2 > 0) { ret = codec4_load_tiles(ctx, gb, param2, param); if (ret) return ret; } if (codec > 32) codec -= 29; for (j = 0; j < w; j += 4) { mask = bits = 0; for (i = 0; i < h; i += 4) { pxoff = j + left + ((top + i) * p); if (param2 > 0) { if (bits == 0) { if (bytestream2_get_bytes_left(gb) < 1) return AVERROR_INVALIDDATA; mask = bytestream2_get_byteu(gb); bits = 8; } bit = !!(mask & 0x80); mask <<= 1; bits--; } else { bit = 0; } if (bytestream2_get_bytes_left(gb) < 1) return AVERROR_INVALIDDATA; idx = bytestream2_get_byteu(gb); if ((bit == 0) && (idx == 0x80) && (codec != 5)) continue; gs = &(ctx->c4tbl[bit][idx][0]); pxo2 = pxoff; for (k = 0; k < 4; k++) { for (l = 0; l < 4; l++) { if (pxo2 >= 0 && pxo2 < maxpxo) { *(dst + pxo2) = *gs; } gs++; pxo2++; } pxo2 = pxo2 - 4 + p; } } } return 0; } static int rle_decode(SANMVideoContext *ctx, GetByteContext *gb, uint8_t *dst, const int out_size) { int opcode, color, run_len, left = out_size; while (left > 0) { opcode = bytestream2_get_byte(gb); run_len = (opcode >> 1) + 1; if (run_len > left || bytestream2_get_bytes_left(gb) <= 0) return AVERROR_INVALIDDATA; if (opcode & 1) { color = bytestream2_get_byte(gb); memset(dst, color, run_len); } else { if (bytestream2_get_bytes_left(gb) < run_len) return AVERROR_INVALIDDATA; bytestream2_get_bufferu(gb, dst, run_len); } dst += run_len; left -= run_len; } return 0; } static int old_codec23(SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height, uint8_t param, uint16_t param2) { const uint32_t maxpxo = ctx->height * ctx->pitch; uint8_t *dst, lut[256], c; int i, j, k, pc, sk; int32_t pxoff; if (ctx->subversion < 2) { /* Rebel Assault 1: constant offset + 0xd0 */ for (i = 0; i < 256; i++) lut[i] = (i + param + 0xd0) & 0xff; } else if (param2 == 256) { if (bytestream2_get_bytes_left(gb) < 256) return AVERROR_INVALIDDATA; bytestream2_get_bufferu(gb, ctx->c23lut, 256); } else if (param2 < 256) { for (i = 0; i < 256; i++) lut[i] = (i + param2) & 0xff; } else { memcpy(lut, ctx->c23lut, 256); } if (bytestream2_get_bytes_left(gb) < 1) return 0; /* some c23 frames just set up the LUT */ dst = (uint8_t *)ctx->fbuf; for (i = 0; i < height; i++) { if (bytestream2_get_bytes_left(gb) < 2) return 0; pxoff = left + ((top + i) * ctx->pitch); k = bytestream2_get_le16u(gb); sk = 1; pc = 0; while (k > 0 && pc <= width) { if (bytestream2_get_bytes_left(gb) < 1) return AVERROR_INVALIDDATA; j = bytestream2_get_byteu(gb); if (sk) { pxoff += j; pc += j; } else { while (j--) { if (pxoff >=0 && pxoff < maxpxo) { c = *(dst + pxoff); *(dst + pxoff) = lut[c]; } pxoff++; pc++; } } sk ^= 1; } } return 0; } static int old_codec21(SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height) { const uint32_t maxpxo = ctx->height * ctx->pitch; uint8_t *dst = (uint8_t *)ctx->fbuf, c; int i, j, k, pc, sk, pxoff; dst = (uint8_t *)ctx->fbuf; for (i = 0; i < height; i++) { if (bytestream2_get_bytes_left(gb) < 2) return 0; pxoff = left + ((top + i) * ctx->pitch); k = bytestream2_get_le16u(gb); sk = 1; pc = 0; while (k > 0 && pc <= width) { if (bytestream2_get_bytes_left(gb) < 2) return AVERROR_INVALIDDATA; j = bytestream2_get_le16u(gb); k -= 2; if (sk) { pxoff += j; pc += j; } else { if (bytestream2_get_bytes_left(gb) < (j + 1)) return AVERROR_INVALIDDATA; do { c = bytestream2_get_byteu(gb); if (pxoff >=0 && pxoff < maxpxo) { *(dst + pxoff) = c; } pxoff++; pc++; j--; k--; } while (j > -1); } sk ^= 1; } } return 0; } static int old_codec1(SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height, int opaque) { int i, j, len, flag, code, val, end, pxoff; const int maxpxo = ctx->height * ctx->pitch; uint8_t *dst = (uint8_t *)ctx->fbuf; for (i = 0; i < height; i++) { if (bytestream2_get_bytes_left(gb) < 2) return AVERROR_INVALIDDATA; len = bytestream2_get_le16u(gb); end = bytestream2_tell(gb) + len; pxoff = left + ((top + i) * ctx->pitch); while (bytestream2_tell(gb) < end) { if (bytestream2_get_bytes_left(gb) < 2) return AVERROR_INVALIDDATA; code = bytestream2_get_byteu(gb); flag = code & 1; code = (code >> 1) + 1; if (flag) { val = bytestream2_get_byteu(gb); if (val || opaque) { for (j = 0; j < code; j++) { if (pxoff >= 0 && pxoff < maxpxo) *(dst + pxoff) = val; pxoff++; } } else { pxoff += code; } } else { if (bytestream2_get_bytes_left(gb) < code) return AVERROR_INVALIDDATA; for (j = 0; j < code; j++) { val = bytestream2_get_byteu(gb); if ((pxoff >= 0) && (pxoff < maxpxo) && (val || opaque)) *(dst + pxoff) = val; pxoff++; } } } } ctx->rotate_code = 0; return 0; } static int old_codec31(SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height, int p1, int opaque) { int i, j, len, flag, code, val, end, pxoff; const int maxpxo = ctx->height * ctx->pitch; uint8_t *dst = (uint8_t *)ctx->fbuf; for (i = 0; i < height; i++) { if (bytestream2_get_bytes_left(gb) < 2) return AVERROR_INVALIDDATA; len = bytestream2_get_le16u(gb); end = bytestream2_tell(gb) + len; pxoff = left + ((top + i) * ctx->pitch); while (bytestream2_tell(gb) < end) { if (bytestream2_get_bytes_left(gb) < 2) return AVERROR_INVALIDDATA; code = bytestream2_get_byteu(gb); flag = code & 1; code = (code >> 1) + 1; if (flag) { val = bytestream2_get_byteu(gb); for (j = 0; j < code; j++) { if ((0 != (val & 0xf)) || opaque) { if (pxoff >= 0 && pxoff < maxpxo) *(dst + pxoff) = p1 + (val & 0xf); } pxoff++; if ((0 != (val >> 4)) || opaque) { if (pxoff >= 0 && pxoff < maxpxo) *(dst + pxoff) = p1 + (val >> 4); } pxoff++; } } else { if (bytestream2_get_bytes_left(gb) < code) return AVERROR_INVALIDDATA; for (j = 0; j < code; j++) { val = bytestream2_get_byteu(gb); if ((pxoff >= 0) && (pxoff < maxpxo) && ((0 != (val & 0xf)) || opaque)) *(dst + pxoff) = p1 + (val & 0xf); pxoff++; if ((pxoff >= 0) && (pxoff < maxpxo) && ((0 != (val >> 4)) || opaque)) *(dst + pxoff) = p1 + (val >> 4); pxoff++; } } } } ctx->rotate_code = 0; return 0; } static int old_codec2(SANMVideoContext *ctx, GetByteContext *gb, int top, int left, int width, int height) { uint8_t *dst = (uint8_t *)ctx->fbuf, col; int16_t xpos = left, ypos = top; while (bytestream2_get_bytes_left(gb) > 3) { xpos += bytestream2_get_le16u(gb); ypos += bytestream2_get_byteu(gb); col = bytestream2_get_byteu(gb); if (xpos >= 0 && ypos >= 0 && xpos < ctx->width && ypos < ctx->height) { *(dst + xpos + ypos * ctx->pitch) = col; } } return 0; } static int old_codec20(SANMVideoContext *ctx, int w, int h) { uint8_t *dst = (uint8_t *)ctx->fbuf; if (bytestream2_get_bytes_left(&ctx->gb) < w * h) return AVERROR_INVALIDDATA; if (w == ctx->pitch) { bytestream2_get_bufferu(&ctx->gb, dst, w * h); } else { for (int i = 0; i < h; i++) { bytestream2_get_bufferu(&ctx->gb, dst, w); dst += ctx->pitch; } } 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 width, int height) { int i, j, k, l, t, run, len, code, skip, mx, my; ptrdiff_t stride = ctx->pitch; 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) { decoded_size = ctx->height * 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)) { FFSWAP(uint16_t*, ctx->frm0, ctx->frm2); } dst = ((uint8_t*)ctx->frm0); prev = ((uint8_t*)ctx->frm2); 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->frm2, 0, ctx->height * stride); break; case 1: run = 0; len = -1; code = 0; for (j = 0; j < height; j += 4) { for (i = 0; i < width; i += 4) { if (len < 0) { if (bytestream2_get_bytes_left(&ctx->gb) < 1) return AVERROR_INVALIDDATA; code = bytestream2_get_byte(&ctx->gb); len = code >> 1; run = code & 1; skip = 0; } else { skip = run; } if (!skip) { if (bytestream2_get_bytes_left(&ctx->gb) < 1) return AVERROR_INVALIDDATA; code = bytestream2_get_byte(&ctx->gb); if (code == 0xff) { len--; for (k = 0; k < 4; k++) { for (l = 0; l < 4; l++) { if (len < 0) { if (bytestream2_get_bytes_left(&ctx->gb) < 1) return AVERROR_INVALIDDATA; code = bytestream2_get_byte(&ctx->gb); len = code >> 1; run = code & 1; if (run) { if (bytestream2_get_bytes_left(&ctx->gb) < 1) return AVERROR_INVALIDDATA; code = bytestream2_get_byte(&ctx->gb); } } if (!run) { if (bytestream2_get_bytes_left(&ctx->gb) < 1) return AVERROR_INVALIDDATA; code = bytestream2_get_byte(&ctx->gb); } *(dst + i + (k * stride) + l) = code; len--; } } continue; } } /* 4x4 block copy from prev with MV */ 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); len--; } dst += stride * 4; prev += stride * 4; } break; case 2: if (rle_decode(ctx, &ctx->gb, dst, decoded_size)) return AVERROR_INVALIDDATA; memset(ctx->frm2, 0, ctx->frm2_size); break; case 3: case 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); 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 ((flags & 4) && (code == 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); } else if ((flags & 4) && (code == 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); } else { 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); if ((compr == 4) && (code == 0)) { if (bytestream2_get_bytes_left(&ctx->gb) < 1) return AVERROR_INVALIDDATA; skip_run = bytestream2_get_byteu(&ctx->gb); } } } 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 void codec47_read_interptable(SANMVideoContext *ctx) { uint8_t *p1, *p2, *itbl = ctx->c47itbl; int i, j; for (i = 0; i < 256; i++) { p1 = p2 = itbl + i; for (j = 256 - i; j; j--) { *p1 = *p2 = bytestream2_get_byte(&ctx->gb); p1 += 1; p2 += 256; } itbl += 256; } } static void codec47_comp1(SANMVideoContext *ctx, uint8_t *dst_in, int width, int height, ptrdiff_t stride) { uint8_t p1, *dst, *itbl = ctx->c47itbl; uint16_t px; int i, j; dst = dst_in + stride; for (i = 0; i < height; i += 2) { p1 = bytestream2_get_byte(&ctx->gb); *dst++ = p1; *dst++ = p1; px = p1; for (j = 2; j < width; j += 2) { p1 = bytestream2_get_byte(&ctx->gb); px = (px << 8) | p1; *dst++ = itbl[px]; *dst++ = p1; } dst += stride; } memcpy(dst_in, dst_in + stride, width); dst = dst_in + stride + stride; for (i = 2; i < height - 1; i += 2) { for (j = 0; j < width; j++) { px = (*(dst - stride) << 8) | *(dst + stride); *dst++ = itbl[px]; } dst += stride; } } static int old_codec47(SANMVideoContext *ctx, int width, int height) { uint32_t decoded_size; int i, j; ptrdiff_t stride = ctx->pitch; uint8_t *dst = (uint8_t *)ctx->frm0; uint8_t *prev1 = (uint8_t *)ctx->frm1; uint8_t *prev2 = (uint8_t *)ctx->frm2; uint8_t auxcol[2]; 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, 7); auxcol[0] = bytestream2_get_byteu(&ctx->gb); auxcol[1] = bytestream2_get_byteu(&ctx->gb); decoded_size = bytestream2_get_le32(&ctx->gb); bytestream2_skip(&ctx->gb, 8); if (decoded_size > ctx->height * stride) { decoded_size = ctx->height * stride; av_log(ctx->avctx, AV_LOG_WARNING, "Decoded size is too large.\n"); } if (skip & 1) { if (bytestream2_get_bytes_left(&ctx->gb) < 0x8080) return AVERROR_INVALIDDATA; codec47_read_interptable(ctx); } if (!seq) { ctx->prev_seq = -1; memset(prev1, auxcol[0], ctx->height * stride); memset(prev2, auxcol[1], 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; codec47_comp1(ctx, dst, width, height, stride); 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, &ctx->gb, 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; } // scale 4x4 input block to an 8x8 output block static void c48_4to8(uint8_t *dst, const uint8_t *src, const uint16_t w) { uint16_t p; // dst is always at least 16bit aligned for (int i = 0; i < 4; i++) { for (int j = 0; j < 8; j += 2) { p = *src++; p = (p << 8) | p; *((uint16_t *)(dst + w * 0 + j)) = p; *((uint16_t *)(dst + w * 1 + j)) = p; } dst += w * 2; } } static int check_mv(int x, int y, const uint16_t w, int h, int blocksize, int mvofs) { if (mvofs < -x + -y*w) return AVERROR_INVALIDDATA; if (mvofs > w-x-blocksize + w*(h-y-blocksize)) return AVERROR_INVALIDDATA; return 0; } static int codec48_block(SANMVideoContext *ctx, uint8_t *dst, uint8_t *db, int x, int y, const uint16_t w, int h) { uint8_t opc, sb[16]; int i, j, k, l; int16_t mvofs; uint32_t ofs; if (bytestream2_get_bytes_left(&ctx->gb) < 1) return 1; opc = bytestream2_get_byteu(&ctx->gb); switch (opc) { case 0xFF: // 1x1 -> 8x8 block scale if (bytestream2_get_bytes_left(&ctx->gb) < 1) return 1; opc = bytestream2_get_byteu(&ctx->gb); for (i = 0; i < 16; i++) sb[i] = opc; c48_4to8(dst, sb, w); break; case 0xFE: // 1x 8x8 copy from deltabuf, 16bit mv from source if (bytestream2_get_bytes_left(&ctx->gb) < 2) return 1; mvofs = bytestream2_get_le16(&ctx->gb); if (check_mv(x, y, w, h, 8, mvofs)) return 1; for (i = 0; i < 8; i++) { ofs = w * i; for (k = 0; k < 8; k++) *(dst + ofs + k) = *(db + ofs + k + mvofs); } break; case 0xFD: // 2x2 -> 8x8 block scale if (bytestream2_get_bytes_left(&ctx->gb) < 4) return 1; sb[ 5] = bytestream2_get_byteu(&ctx->gb); sb[ 7] = bytestream2_get_byteu(&ctx->gb); sb[13] = bytestream2_get_byteu(&ctx->gb); sb[15] = bytestream2_get_byteu(&ctx->gb); sb[0] = sb[1] = sb[4] = sb[5]; sb[2] = sb[3] = sb[6] = sb[7]; sb[8] = sb[9] = sb[12] = sb[13]; sb[10] = sb[11] = sb[14] = sb[15]; c48_4to8(dst, sb, w); break; case 0xFC: // 4x copy 4x4 block, per-block c37_mv from source if (bytestream2_get_bytes_left(&ctx->gb) < 4) return 1; for (i = 0; i < 8; i += 4) { for (k = 0; k < 8; k += 4) { opc = bytestream2_get_byteu(&ctx->gb); mvofs = c37_mv[opc * 2] + (c37_mv[opc * 2 + 1] * w); if (check_mv(x+k, y+i, w, h, 4, mvofs)) return 1; for (j = 0; j < 4; j++) { ofs = (w * (j + i)) + k; for (l = 0; l < 4; l++) *(dst + ofs + l) = *(db + ofs + l + mvofs); } } } break; case 0xFB: // Copy 4x 4x4 blocks, per-block mv from source if (bytestream2_get_bytes_left(&ctx->gb) < 8) return 1; for (i = 0; i < 8; i += 4) { for (k = 0; k < 8; k += 4) { mvofs = bytestream2_get_le16(&ctx->gb); if (check_mv(x+k, y+i, w, h, 4, mvofs)) return 1; for (j = 0; j < 4; j++) { ofs = (w * (j + i)) + k; for (l = 0; l < 4; l++) *(dst + ofs + l) = *(db + ofs + l + mvofs); } } } break; case 0xFA: // scale 4x4 input block to 8x8 dest block if (bytestream2_get_bytes_left(&ctx->gb) < 16) return 1; bytestream2_get_bufferu(&ctx->gb, sb, 16); c48_4to8(dst, sb, w); break; case 0xF9: // 16x 2x2 copy from delta, per-block c37_mv from source if (bytestream2_get_bytes_left(&ctx->gb) < 16) return 1; for (i = 0; i < 8; i += 2) { for (j = 0; j < 8; j += 2) { ofs = (w * i) + j; opc = bytestream2_get_byteu(&ctx->gb); mvofs = c37_mv[opc * 2] + (c37_mv[opc * 2 + 1] * w); if (check_mv(x+j, y+i, w, h, 2, mvofs)) return 1; for (l = 0; l < 2; l++) { *(dst + ofs + l + 0) = *(db + ofs + l + 0 + mvofs); *(dst + ofs + l + w) = *(db + ofs + l + w + mvofs); } } } break; case 0xF8: // 16x 2x2 blocks copy, 16bit mv from source if (bytestream2_get_bytes_left(&ctx->gb) < 32) return 1; for (i = 0; i < 8; i += 2) { for (j = 0; j < 8; j += 2) { ofs = w * i + j; mvofs = bytestream2_get_le16(&ctx->gb); if (check_mv(x+j, y+i, w, h, 2, mvofs)) return 1; for (l = 0; l < 2; l++) { *(dst + ofs + l + 0) = *(db + ofs + l + 0 + mvofs); *(dst + ofs + l + w) = *(db + ofs + l + w + mvofs); } } } break; case 0xF7: // copy 8x8 block from src to dest if (bytestream2_get_bytes_left(&ctx->gb) < 64) return 1; for (i = 0; i < 8; i++) { ofs = i * w; for (l = 0; l < 8; l++) *(dst + ofs + l) = bytestream2_get_byteu(&ctx->gb); } break; default: // copy 8x8 block from prev, c37_mv from source mvofs = c37_mv[opc * 2] + (c37_mv[opc * 2 + 1] * w); if (check_mv(x, y, w, h, 8, mvofs)) return 1; for (i = 0; i < 8; i++) { ofs = i * w; for (l = 0; l < 8; l++) *(dst + ofs + l) = *(db + ofs + l + mvofs); } break; } return 0; } static int old_codec48(SANMVideoContext *ctx, int width, int height) { uint8_t *dst, *prev; int compr = bytestream2_get_byte(&ctx->gb); int mvidx = bytestream2_get_byte(&ctx->gb); int seq = bytestream2_get_le16(&ctx->gb); uint32_t decoded_size = bytestream2_get_le32(&ctx->gb); int i, j, flags; // all codec48 videos use 1, but just to be safe... if (mvidx != 1) { av_log(ctx->avctx, AV_LOG_ERROR, "Invalid motion base value %d.\n", mvidx); return AVERROR_INVALIDDATA; } bytestream2_skip(&ctx->gb, 4); flags = bytestream2_get_byte(&ctx->gb); bytestream2_skip(&ctx->gb, 3); if (flags & 8) { if (bytestream2_get_bytes_left(&ctx->gb) < 0x8080) return AVERROR_INVALIDDATA; codec47_read_interptable(ctx); } dst = (uint8_t*)ctx->frm0; prev = (uint8_t*)ctx->frm2; if (!seq) { ctx->prev_seq = -1; memset(prev, 0, ctx->aligned_height * width); } 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 += width; } break; case 2: if (decoded_size > ctx->buf_size) { av_log(ctx->avctx, AV_LOG_ERROR, "Decoded size %u is too large.\n", decoded_size); return AVERROR_INVALIDDATA; } if (rle_decode(ctx, &ctx->gb, dst, decoded_size)) return AVERROR_INVALIDDATA; break; case 3: if (seq == ctx->prev_seq + 1) { for (j = 0; j < height; j += 8) { for (i = 0; i < width; i += 8) { if (codec48_block(ctx, dst + i, prev + i, i, j, width, height)) return AVERROR_INVALIDDATA; } dst += width * 8; prev += width * 8; } } break; case 5: if (bytestream2_get_bytes_left(&ctx->gb) < ((width + 1) >> 1) * ((height + 1) >> 1)) return AVERROR_INVALIDDATA; codec47_comp1(ctx, dst, width, height, width); break; case 6: // in some videos of "Star Wars - Making Magic", ignored. break; default: avpriv_report_missing_feature(ctx->avctx, "Subcodec 48 compression %d", compr); return AVERROR_PATCHWELCOME; } ctx->rotate_code = 1; // swap frm[0] and frm[2] ctx->prev_seq = seq; return 0; } static int process_frame_obj(SANMVideoContext *ctx, GetByteContext *gb, int xoff, int yoff) { uint16_t w, h, parm2; uint8_t codec, param; int16_t left, top; int fsc, sote, ret; codec = bytestream2_get_byteu(gb); param = bytestream2_get_byteu(gb); left = bytestream2_get_le16u(gb) + xoff; top = bytestream2_get_le16u(gb) + yoff; w = bytestream2_get_le16u(gb); h = bytestream2_get_le16u(gb); bytestream2_skip(gb, 2); parm2 = bytestream2_get_le16u(gb); if (w < 1 || h < 1 || w > 640 || h > 480 || left > 640 || top > 480 || left + w <= 0 || top + h <= 0) { av_log(ctx->avctx, AV_LOG_WARNING, "ignoring invalid fobj dimensions: c%d %d %d @ %d %d\n", codec, w, h, left, top); return 0; } /* codecs with their own buffers */ fsc = (codec == 37 || codec == 47 || codec == 48); /* special case for "Shadows of the Empire" videos */ sote = ((w == 640) && (h == 272) && (codec == 47)); if (sote) left = top = 0; if (!ctx->have_dimensions) { int xres, yres; if (ctx->subversion < 2) { /* Rebel Assault 1: 384x242 internal size */ xres = 384; yres = 242; if (w > xres || h > yres) return AVERROR_INVALIDDATA; ctx->have_dimensions = 1; } else if (fsc) { /* these codecs work on full frames, trust their dimensions */ xres = w; yres = h; ctx->have_dimensions = 1; } else { /* detect common sizes */ xres = w + left; yres = h + top; if (sote) { /* SotE: has top=60 at all times to center video * inside the 640x480 game window */ xres = w; yres = h; ctx->have_dimensions = 1; } else if (((xres == 424) && (yres == 260)) || /* RA2 */ ((xres == 320) && (yres == 200)) || /* ft/dig/... */ ((xres == 640) && (yres == 480))) { /* ol/comi/mots... */ ctx->have_dimensions = 1; } xres = FFMAX(xres, ctx->width); yres = FFMAX(yres, ctx->height); } if (ctx->width < xres || ctx->height < yres) { int ret = ff_set_dimensions(ctx->avctx, xres, yres); if (ret < 0) return ret; init_sizes(ctx, xres, yres); if (init_buffers(ctx)) { av_log(ctx->avctx, AV_LOG_ERROR, "Error resizing buffers.\n"); return AVERROR(ENOMEM); } } } else { if (((left + w > ctx->width) || (top + h > ctx->height)) && (fsc || codec == 20)) { /* correct unexpected overly large frames: this happens * for instance with The Dig's sq1.san video: it has a few * (all black) 640x480 frames halfway in, while the rest is * 320x200. */ av_log(ctx->avctx, AV_LOG_WARNING, "resizing too large fobj: c%d %d %d @ %d %d\n", codec, w, h, left, top); w = ctx->width; h = ctx->height; } } /* users of codecs>=37 are subversion 2, enforce that for STOR/FTCH */ if (fsc) ctx->subversion = 2; /* clear the main buffer on the first fob */ if (ctx->first_fob) { ctx->first_fob = 0; if (!fsc) memset(ctx->fbuf, 0, ctx->frm0_size); } if (w + FFMAX(left, 0) > ctx->avctx->width || h + FFMAX(top, 0) > ctx->avctx->height) { avpriv_request_sample(ctx->avctx, "overly large frame\n"); return AVERROR_PATCHWELCOME; } switch (codec) { case 1: case 3: return old_codec1(ctx, gb, top, left, w, h, codec == 3); case 2: return old_codec2(ctx, gb, top, left, w, h); case 4: case 5: case 33: case 34: return old_codec4(ctx, gb, top, left, w, h, param, parm2, codec); case 20: return old_codec20(ctx, w, h); case 21: return old_codec21(ctx, gb, top, left, w, h); case 23: return old_codec23(ctx, gb, top, left, w, h, param, parm2); case 31: case 32: return old_codec31(ctx, gb, top, left, w, h, param, (codec == 32)); case 37: ret = old_codec37(ctx, w, h); break; case 45: return 0; case 47: ret = old_codec47(ctx, w, h); break; case 48: ret = old_codec48(ctx, w, h); break; default: avpriv_request_sample(ctx->avctx, "Subcodec %d", codec); ctx->frame->flags |= AV_FRAME_FLAG_CORRUPT; return 0; } if (ret) return ret; /* copy the codec37/47/48 result to main buffer */ if ((w == ctx->width) && (h == ctx->height)) { memcpy(ctx->fbuf, ctx->frm0, ctx->fbuf_size); } else { const uint8_t *src = (uint8_t *)ctx->frm0; const int cw = FFMIN(w, ctx->width - left); const int ch = FFMIN(h, ctx->height - top); if ((cw > 0) && (ch > 0) && (left >= 0) && (top >= 0)) { uint8_t *dst = (uint8_t *)ctx->fbuf + left + top * ctx->pitch; for (int i = 0; i < ch; i++) { memcpy(dst, src, cw); dst += ctx->pitch; src += w; } } } return 0; } static int process_ftch(SANMVideoContext *ctx, int size) { int xoff, yoff, ret; GetByteContext gb; /* FTCH defines additional x/y offsets */ if (size == 6) { bytestream2_skip(&ctx->gb, 2); xoff = bytestream2_get_le16u(&ctx->gb); yoff = bytestream2_get_le16u(&ctx->gb); } else if (size == 12) { av_assert0(bytestream2_get_bytes_left(&ctx->gb) >= 12); bytestream2_skip(&ctx->gb, 4); xoff = bytestream2_get_be32u(&ctx->gb); yoff = bytestream2_get_be32u(&ctx->gb); } else return 1; if (ctx->stor_size > 0) { /* decode the stored FOBJ */ uint8_t *bitstream = av_malloc(ctx->stor_size + AV_INPUT_BUFFER_PADDING_SIZE); if (!bitstream) return AVERROR(ENOMEM); memcpy(bitstream, ctx->stored_frame, ctx->stor_size); bytestream2_init(&gb, bitstream, ctx->stor_size); ret = process_frame_obj(ctx, &gb, xoff, yoff); av_free(bitstream); } else { /* this happens a lot in RA1: The individual files are meant to * be played in sequence, with some referencing objects STORed * by previous files, e.g. the cockpit codec21 object in RA1 LVL8. * But spamming the log with errors is also not helpful, so * here we simply ignore this case. */ ret = 0; } return ret; } static int process_xpal(SANMVideoContext *ctx, int size) { int16_t *dp = ctx->delta_pal; uint32_t *pal = ctx->pal; uint16_t cmd; uint8_t c[3]; int i, j; bytestream2_skip(&ctx->gb, 2); cmd = bytestream2_get_be16(&ctx->gb); if (cmd == 1) { for (i = 0; i < PALETTE_DELTA; i += 3) { c[0] = (*pal >> 16) & 0xFF; c[1] = (*pal >> 8) & 0xFF; c[2] = (*pal >> 0) & 0xFF; for (j = 0; j < 3; j++) { int cl = (c[j] * 129) + *dp++; c[j] = av_clip_uint8(cl / 128) & 0xFF; } *pal++ = 0xFFU << 24 | c[0] << 16 | c[1] << 8 | c[2]; } } else if (cmd == 2) { if (size < PALETTE_DELTA * 2 + 4) { av_log(ctx->avctx, AV_LOG_ERROR, "Incorrect palette change block size %"PRIu32".\n", size); return AVERROR_INVALIDDATA; } for (i = 0; i < PALETTE_DELTA; i++) dp[i] = bytestream2_get_le16u(&ctx->gb); if (size >= PALETTE_DELTA * 2 + 4 + PALETTE_SIZE * 3) { for (i = 0; i < PALETTE_SIZE; i++) ctx->pal[i] = 0xFFU << 24 | bytestream2_get_be24u(&ctx->gb); if (ctx->subversion < 2) ctx->pal[0] = 0xFFU << 24; } } return 0; } 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, &ctx->gb, 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, &ctx->gb, 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 = hdr ? (uint8_t *)ctx->frm0 : (uint8_t *)ctx->fbuf; 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, AVFrame *frame, int *got_frame_ptr, AVPacket *pkt) { SANMVideoContext *ctx = avctx->priv_data; int i, ret; ctx->frame = frame; bytestream2_init(&ctx->gb, pkt->data, pkt->size); if (!ctx->version) { int to_store = 0, have_img = 0; ctx->first_fob = 1; 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); if (ctx->subversion < 2) ctx->pal[0] = 0xFFU << 24; break; case MKBETAG('F', 'O', 'B', 'J'): if (size < 16) return AVERROR_INVALIDDATA; if (ret = process_frame_obj(ctx, &ctx->gb, 0, 0)) { return ret; } have_img = 1; /* STOR: for ANIMv0/1 store the whole FOBJ datablock, as it * needs to be replayed on FTCH, since none of the codecs * it uses work on the full buffer. * For ANIMv2, it's enough to store the current framebuffer. */ if (to_store) { to_store = 0; if (ctx->subversion < 2) { if (size <= ctx->stored_frame_size) { int pos2 = bytestream2_tell(&ctx->gb); bytestream2_seek(&ctx->gb, pos, SEEK_SET); bytestream2_get_bufferu(&ctx->gb, ctx->stored_frame, size); bytestream2_seek(&ctx->gb, pos2, SEEK_SET); ctx->stor_size = size; } else { av_log(avctx, AV_LOG_ERROR, "FOBJ too large for STOR\n"); ret = AVERROR(ENOMEM); } } else { memcpy(ctx->stored_frame, ctx->fbuf, ctx->buf_size); } } break; case MKBETAG('X', 'P', 'A', 'L'): if (ret = process_xpal(ctx, size)) return ret; break; case MKBETAG('S', 'T', 'O', 'R'): to_store = 1; break; case MKBETAG('F', 'T', 'C', 'H'): if (ctx->subversion < 2) { if (ret = process_ftch(ctx, size)) return ret; } else { memcpy(ctx->fbuf, ctx->stored_frame, ctx->buf_size); } have_img = 1; break; default: bytestream2_skip(&ctx->gb, size); av_log(avctx, AV_LOG_DEBUG, "Unknown/unsupported chunk %"PRIx32".\n", sig); break; } /* the sizes of chunks are usually a multiple of 2. However * there are a few unaligned FOBJs in RA1 L2PLAY.ANM only (looks * like a game bug) and IACT audio chunks which have odd sizes * but are padded with a zero byte. */ bytestream2_seek(&ctx->gb, pos + size, SEEK_SET); if ((pos + size) & 1) { if (0 != bytestream2_get_byteu(&ctx->gb)) bytestream2_seek(&ctx->gb, pos + size, SEEK_SET); } } if (have_img) { if ((ret = copy_output(ctx, NULL))) return ret; memcpy(ctx->frame->data[1], ctx->pal, 1024); *got_frame_ptr = 1; } } else { SANMFrameHeader header; if ((ret = read_frame_header(ctx, &header))) return ret; ctx->rotate_code = header.rotate_code; if (!header.seq_num) { ctx->frame->flags |= AV_FRAME_FLAG_KEY; 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->flags &= ~AV_FRAME_FLAG_KEY; 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; *got_frame_ptr = 1; } if (ctx->rotate_code) rotate_bufs(ctx, ctx->rotate_code); return pkt->size; } const FFCodec ff_sanm_decoder = { .p.name = "sanm", CODEC_LONG_NAME("LucasArts SANM/Smush video"), .p.type = AVMEDIA_TYPE_VIDEO, .p.id = AV_CODEC_ID_SANM, .priv_data_size = sizeof(SANMVideoContext), .init = decode_init, .close = decode_end, FF_CODEC_DECODE_CB(decode_frame), .p.capabilities = AV_CODEC_CAP_DR1, };