1 /* 2 * Texture block module 3 * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.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 /** 23 * @file 24 * Texture block (4x4) module 25 * 26 * References: 27 * https://www.opengl.org/wiki/S3_Texture_Compression 28 * https://www.opengl.org/wiki/Red_Green_Texture_Compression 29 * https://msdn.microsoft.com/en-us/library/bb694531%28v=vs.85%29.aspx 30 * 31 * All functions return how much data has been written or read. 32 * 33 * Pixel input or output format is always AV_PIX_FMT_RGBA. 34 */ 35 36 #ifndef AVCODEC_TEXTUREDSP_H 37 #define AVCODEC_TEXTUREDSP_H 38 39 #include <stddef.h> 40 #include <stdint.h> 41 42 #define TEXTURE_BLOCK_W 4 43 #define TEXTURE_BLOCK_H 4 44 45 typedef struct TextureDSPContext { 46 int (*dxt1_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 47 int (*dxt1a_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 48 int (*dxt2_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 49 int (*dxt3_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 50 int (*dxt4_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 51 int (*dxt5_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 52 int (*dxt5y_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 53 int (*dxt5ys_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 54 int (*rgtc1s_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 55 int (*rgtc1u_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 56 int (*rgtc1u_gray_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 57 int (*rgtc1u_alpha_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 58 int (*rgtc2s_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 59 int (*rgtc2u_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 60 int (*dxn3dc_block) (uint8_t *dst, ptrdiff_t stride, const uint8_t *block); 61 } TextureDSPContext; 62 63 void ff_texturedsp_init(TextureDSPContext *c); 64 void ff_texturedspenc_init(TextureDSPContext *c); 65 66 #endif /* AVCODEC_TEXTUREDSP_H */ 67