yuv2rgb_mmx.c
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1 /*
2  * software YUV to RGB converter
3  *
4  * Copyright (C) 2009 Konstantin Shishkov
5  *
6  * MMX/MMX2 template stuff (needed for fast movntq support),
7  * 1,4,8bpp support and context / deglobalize stuff
8  * by Michael Niedermayer (michaelni@gmx.at)
9  *
10  * This file is part of Libav.
11  *
12  * Libav is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU Lesser General Public
14  * License as published by the Free Software Foundation; either
15  * version 2.1 of the License, or (at your option) any later version.
16  *
17  * Libav is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20  * Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with Libav; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25  */
26 
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <inttypes.h>
30 #include <assert.h>
31 
32 #include "config.h"
33 #include "libswscale/rgb2rgb.h"
34 #include "libswscale/swscale.h"
36 #include "libavutil/x86_cpu.h"
37 #include "libavutil/cpu.h"
38 
39 #define DITHER1XBPP // only for MMX
40 
41 /* hope these constant values are cache line aligned */
42 DECLARE_ASM_CONST(8, uint64_t, mmx_00ffw) = 0x00ff00ff00ff00ffULL;
43 DECLARE_ASM_CONST(8, uint64_t, mmx_redmask) = 0xf8f8f8f8f8f8f8f8ULL;
44 DECLARE_ASM_CONST(8, uint64_t, mmx_grnmask) = 0xfcfcfcfcfcfcfcfcULL;
45 DECLARE_ASM_CONST(8, uint64_t, pb_e0) = 0xe0e0e0e0e0e0e0e0ULL;
46 DECLARE_ASM_CONST(8, uint64_t, pb_03) = 0x0303030303030303ULL;
47 DECLARE_ASM_CONST(8, uint64_t, pb_07) = 0x0707070707070707ULL;
48 
49 //MMX versions
50 #if HAVE_MMX
51 #undef RENAME
52 #undef COMPILE_TEMPLATE_MMX2
53 #define COMPILE_TEMPLATE_MMX2 0
54 #define RENAME(a) a ## _MMX
55 #include "yuv2rgb_template.c"
56 #endif /* HAVE_MMX */
57 
58 //MMX2 versions
59 #if HAVE_MMX2
60 #undef RENAME
61 #undef COMPILE_TEMPLATE_MMX2
62 #define COMPILE_TEMPLATE_MMX2 1
63 #define RENAME(a) a ## _MMX2
64 #include "yuv2rgb_template.c"
65 #endif /* HAVE_MMX2 */
66 
68 {
70 
71  if (c->srcFormat != PIX_FMT_YUV420P &&
73  return NULL;
74 
75 #if HAVE_MMX2
76  if (cpu_flags & AV_CPU_FLAG_MMX2) {
77  switch (c->dstFormat) {
78  case PIX_FMT_RGB24: return yuv420_rgb24_MMX2;
79  case PIX_FMT_BGR24: return yuv420_bgr24_MMX2;
80  }
81  }
82 #endif
83 
84  if (cpu_flags & AV_CPU_FLAG_MMX) {
85  switch (c->dstFormat) {
86  case PIX_FMT_RGB32:
87  if (c->srcFormat == PIX_FMT_YUVA420P) {
88 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
89  return yuva420_rgb32_MMX;
90 #endif
91  break;
92  } else return yuv420_rgb32_MMX;
93  case PIX_FMT_BGR32:
94  if (c->srcFormat == PIX_FMT_YUVA420P) {
95 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
96  return yuva420_bgr32_MMX;
97 #endif
98  break;
99  } else return yuv420_bgr32_MMX;
100  case PIX_FMT_RGB24: return yuv420_rgb24_MMX;
101  case PIX_FMT_BGR24: return yuv420_bgr24_MMX;
102  case PIX_FMT_RGB565: return yuv420_rgb16_MMX;
103  case PIX_FMT_RGB555: return yuv420_rgb15_MMX;
104  }
105  }
106 
107  return NULL;
108 }