| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * VP5/6/8 decoder | ||
| 3 | * Copyright (c) 2010 Fiona Glaser <fiona@x264.com> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include <stdint.h> | ||
| 23 | #include "libavutil/error.h" | ||
| 24 | #include "bytestream.h" | ||
| 25 | #include "vpx_rac.h" | ||
| 26 | |||
| 27 | const uint8_t ff_vpx_norm_shift[256]= { | ||
| 28 | 8,7,6,6,5,5,5,5,4,4,4,4,4,4,4,4, | ||
| 29 | 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, | ||
| 30 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, | ||
| 31 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, | ||
| 32 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | ||
| 33 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | ||
| 34 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | ||
| 35 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | ||
| 36 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | ||
| 37 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | ||
| 38 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | ||
| 39 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | ||
| 40 | }; | ||
| 41 | |||
| 42 | 8262 | int ff_vpx_init_range_decoder(VPXRangeCoder *c, const uint8_t *buf, int buf_size) | |
| 43 | { | ||
| 44 | 8262 | c->high = 255; | |
| 45 | 8262 | c->bits = -16; | |
| 46 | 8262 | c->buffer = buf; | |
| 47 | 8262 | c->end = buf + buf_size; | |
| 48 | 8262 | c->end_reached = 0; | |
| 49 |
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8262 | if (buf_size < 1) |
| 50 | ✗ | return AVERROR_INVALIDDATA; | |
| 51 | 8262 | c->code_word = bytestream_get_be24(&c->buffer); | |
| 52 | 8262 | return 0; | |
| 53 | } | ||
| 54 |