1/* 2 * S3 Texture Compression (S3TC) decoding functions 3 * Copyright (c) 2007 by Ivo van Poorten 4 * 5 * This file is part of Libav. 6 * 7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#ifndef AVCODEC_S3TC_H 23#define AVCODEC_S3TC_H 24 25#include <stdint.h> 26 27#define FF_S3TC_DXT1 0x31545844 28#define FF_S3TC_DXT3 0x33545844 29 30/** 31 * Decode DXT1 encoded data to RGB32 32 * @param src source buffer, has to be aligned on a 4-byte boundary 33 * @param dst destination buffer 34 * @param w width of output image 35 * @param h height of output image 36 * @param stride line size of output image 37 */ 38void ff_decode_dxt1(const uint8_t *src, uint8_t *dst, 39 const unsigned int w, const unsigned int h, 40 const unsigned int stride); 41/** 42 * Decode DXT3 encoded data to RGB32 43 * @param src source buffer, has to be aligned on a 4-byte boundary 44 * @param dst destination buffer 45 * @param w width of output image 46 * @param h height of output image 47 * @param stride line size of output image 48 */ 49void ff_decode_dxt3(const uint8_t *src, uint8_t *dst, 50 const unsigned int w, const unsigned int h, 51 const unsigned int stride); 52 53#endif /* AVCODEC_S3TC_H */ 54