blob: a65cb3aa1bdcb8910749c3780a5a154014f3fa83
| 1 | /* |
| 2 | * Snappy module |
| 3 | * Copyright (c) Luca Barbato |
| 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 | /** |
| 23 | * @file |
| 24 | * Snappy decompression |
| 25 | * |
| 26 | * Snappy is a compression/decompression algorithm that does not aim for |
| 27 | * maximum compression, but rather for very high speeds and reasonable |
| 28 | * compression. |
| 29 | * |
| 30 | * http://en.wikipedia.org/wiki/Snappy_%28software%29 |
| 31 | */ |
| 32 | |
| 33 | #ifndef AVCODEC_SNAPPY_H |
| 34 | #define AVCODEC_SNAPPY_H |
| 35 | |
| 36 | #include <stdint.h> |
| 37 | |
| 38 | #include "bytestream.h" |
| 39 | |
| 40 | /** |
| 41 | * Get the uncompressed length of an input buffer compressed using the Snappy |
| 42 | * algorithm. The GetByteContext is not advanced. |
| 43 | * |
| 44 | * @param gb input GetByteContext. |
| 45 | * @return A positive length on success, AVERROR otherwise. |
| 46 | */ |
| 47 | int64_t ff_snappy_peek_uncompressed_length(GetByteContext *gb); |
| 48 | |
| 49 | /** |
| 50 | * Decompress an input buffer using Snappy algorithm. |
| 51 | * |
| 52 | * @param gb input GetByteContext. |
| 53 | * @param buf input buffer pointer. |
| 54 | * @param size input/output on input, the size of buffer, on output, the size |
| 55 | * of the uncompressed data. |
| 56 | * @return 0 if success, AVERROR otherwise. |
| 57 | */ |
| 58 | int ff_snappy_uncompress(GetByteContext *gb, uint8_t *buf, int64_t *size); |
| 59 | |
| 60 | #endif /* AVCODEC_SNAPPY_H */ |
| 61 |