3 * Copyright (C) 2015 Vittorio Giovara <vittorio.giovara@gmail.com>
5 * This file is part of FFmpeg.
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.
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.
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
24 * Texture block (4x4) module
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
31 * All functions return how much data has been written or read.
33 * Pixel input or output format is always AV_PIX_FMT_RGBA.
36 #ifndef AVCODEC_TEXTUREDSP_H
37 #define AVCODEC_TEXTUREDSP_H
42 #define TEXTURE_BLOCK_W 4
43 #define TEXTURE_BLOCK_H 4
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_alpha_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
57 int (*rgtc2s_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
58 int (*rgtc2u_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
59 int (*dxn3dc_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block);
62 void ff_texturedsp_init(TextureDSPContext *c);
63 void ff_texturedspenc_init(TextureDSPContext *c);
65 #endif /* AVCODEC_TEXTUREDSP_H */