blob: 26f3b6473fc1ed294b9f7b53f11c0dcc412378e2
| 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 (*rgtc2s_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block); |
| 57 | int (*rgtc2u_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block); |
| 58 | int (*dxn3dc_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block); |
| 59 | } TextureDSPContext; |
| 60 | |
| 61 | void ff_texturedsp_init(TextureDSPContext *c); |
| 62 | void ff_texturedspenc_init(TextureDSPContext *c); |
| 63 | |
| 64 | #endif /* AVCODEC_TEXTUREDSP_H */ |
| 65 |