FFmpeg
yuv2rgb.c
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1 /*
2  * software YUV to RGB converter
3  *
4  * Copyright (C) 2009 Konstantin Shishkov
5  *
6  * MMX/MMXEXT 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 FFmpeg.
11  *
12  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 
31 #include "config.h"
32 #include "libswscale/rgb2rgb.h"
33 #include "libswscale/swscale.h"
34 #include "libswscale/swscale_internal.h"
35 #include "libavutil/attributes.h"
36 #include "libavutil/x86/asm.h"
37 #include "libavutil/x86/cpu.h"
38 #include "libavutil/cpu.h"
39 
40 #if HAVE_X86ASM
41 
42 #define DITHER1XBPP // only for MMX
43 
44 //MMX versions
45 #if HAVE_MMX
46 #undef RENAME
47 #define COMPILE_TEMPLATE_MMX
48 #define RENAME(a) a ## _mmx
49 #include "yuv2rgb_template.c"
50 #undef COMPILE_TEMPLATE_MMX
51 #endif /* HAVE_MMX */
52 
53 // MMXEXT versions
54 #undef RENAME
55 #define COMPILE_TEMPLATE_MMXEXT
56 #define RENAME(a) a ## _mmxext
57 #include "yuv2rgb_template.c"
58 #undef COMPILE_TEMPLATE_MMXEXT
59 
60 //SSSE3 versions
61 #undef RENAME
62 #define COMPILE_TEMPLATE_SSSE3
63 #define RENAME(a) a ## _ssse3
64 #include "yuv2rgb_template.c"
65 
66 #endif /* HAVE_X86ASM */
67 
68 av_cold SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
69 {
70 #if HAVE_X86ASM
71  int cpu_flags = av_get_cpu_flags();
72 
73  if (EXTERNAL_SSSE3(cpu_flags)) {
74  switch (c->dstFormat) {
75  case AV_PIX_FMT_RGB32:
76  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
77 #if CONFIG_SWSCALE_ALPHA
78  return yuva420_rgb32_ssse3;
79 #endif
80  break;
81  } else
82  return yuv420_rgb32_ssse3;
83  case AV_PIX_FMT_BGR32:
84  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
85 #if CONFIG_SWSCALE_ALPHA
86  return yuva420_bgr32_ssse3;
87 #endif
88  break;
89  } else
90  return yuv420_bgr32_ssse3;
91  case AV_PIX_FMT_RGB24:
92  return yuv420_rgb24_ssse3;
93  case AV_PIX_FMT_BGR24:
94  return yuv420_bgr24_ssse3;
95  case AV_PIX_FMT_RGB565:
96  return yuv420_rgb16_ssse3;
97  case AV_PIX_FMT_RGB555:
98  return yuv420_rgb15_ssse3;
99  }
100  }
101 
102  if (EXTERNAL_MMXEXT(cpu_flags)) {
103  switch (c->dstFormat) {
104  case AV_PIX_FMT_RGB24:
105  return yuv420_rgb24_mmxext;
106  case AV_PIX_FMT_BGR24:
107  return yuv420_bgr24_mmxext;
108  }
109  }
110 
111  if (EXTERNAL_MMX(cpu_flags)) {
112  switch (c->dstFormat) {
113  case AV_PIX_FMT_RGB32:
114  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
115 #if CONFIG_SWSCALE_ALPHA
116  return yuva420_rgb32_mmx;
117 #endif
118  break;
119  } else
120  return yuv420_rgb32_mmx;
121  case AV_PIX_FMT_BGR32:
122  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
123 #if CONFIG_SWSCALE_ALPHA
124  return yuva420_bgr32_mmx;
125 #endif
126  break;
127  } else
128  return yuv420_bgr32_mmx;
129  case AV_PIX_FMT_RGB565:
130  return yuv420_rgb16_mmx;
131  case AV_PIX_FMT_RGB555:
132  return yuv420_rgb15_mmx;
133  }
134  }
135 
136 #endif /* HAVE_X86ASM */
137  return NULL;
138 }
cpu.h
AV_PIX_FMT_BGR32
#define AV_PIX_FMT_BGR32
Definition: pixfmt.h:443
AV_PIX_FMT_BGR24
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:103
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:52
SwsFunc
int(* SwsFunc)(struct SwsContext *context, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
Definition: swscale_internal.h:99
ff_yuv2rgb_init_x86
av_cold SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
Definition: yuv2rgb.c:68
av_cold
#define av_cold
Definition: attributes.h:90
AV_PIX_FMT_YUVA420P
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
NULL
#define NULL
Definition: coverity.c:32
yuv2rgb_template.c
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AV_PIX_FMT_RGB24
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
cpu.h
asm.h
AV_PIX_FMT_RGB32
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:441
attributes.h
AV_PIX_FMT_RGB555
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:456
swscale_internal.h
AV_PIX_FMT_RGB565
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:455
EXTERNAL_SSSE3
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:65
SwsContext
Definition: swscale_internal.h:299
EXTERNAL_MMX
#define EXTERNAL_MMX(flags)
Definition: cpu.h:56
EXTERNAL_MMXEXT
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57
rgb2rgb.h
swscale.h
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