FFmpeg  4.0
texturedsp.h
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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);
62 
65 
66 #endif /* AVCODEC_TEXTUREDSP_H */
int(* dxt5_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:51
int(* rgtc1u_alpha_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:57
int stride
Definition: mace.c:144
static int16_t block[64]
Definition: dct.c:115
uint8_t
int(* dxt5y_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:52
int(* dxt3_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:49
int(* rgtc2s_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:58
int(* dxt5ys_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:53
int(* rgtc1u_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:55
int(* dxt1a_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:47
int(* dxt2_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:48
void ff_texturedsp_init(TextureDSPContext *c)
Definition: texturedsp.c:637
int(* dxt1_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:46
void ff_texturedspenc_init(TextureDSPContext *c)
int(* dxt4_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:50
int(* rgtc1s_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:54
int
static double c[64]
int(* rgtc2u_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:59
int(* rgtc1u_gray_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:56
int(* dxn3dc_block)(uint8_t *dst, ptrdiff_t stride, const uint8_t *block)
Definition: texturedsp.h:60