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