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 #undef COMPILE_TEMPLATE_MMXEXT
48 #define COMPILE_TEMPLATE_MMXEXT 0
49 #define RENAME(a) a ## _mmx
50 #include "yuv2rgb_template.c"
51 #endif /* HAVE_MMX */
52 
53 // MMXEXT versions
54 #undef RENAME
55 #undef COMPILE_TEMPLATE_MMXEXT
56 #define COMPILE_TEMPLATE_MMXEXT 1
57 #define RENAME(a) a ## _mmxext
58 #include "yuv2rgb_template.c"
59 
60 //SSSE3 versions
61 #undef RENAME
62 #undef COMPILE_TEMPLATE_MMXEXT
63 #define COMPILE_TEMPLATE_MMXEXT 0
64 #define RENAME(a) a ## _ssse3
65 #include "yuv2rgb_template.c"
66 
67 #endif /* HAVE_X86ASM */
68 
69 av_cold SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
70 {
71 #if HAVE_X86ASM
72  int cpu_flags = av_get_cpu_flags();
73 
74  if (EXTERNAL_SSSE3(cpu_flags)) {
75  switch (c->dstFormat) {
76  case AV_PIX_FMT_RGB32:
77  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
78 #if CONFIG_SWSCALE_ALPHA
79  return yuva420_rgb32_ssse3;
80 #endif
81  break;
82  } else
83  return yuv420_rgb32_ssse3;
84  case AV_PIX_FMT_BGR32:
85  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
86 #if CONFIG_SWSCALE_ALPHA
87  return yuva420_bgr32_ssse3;
88 #endif
89  break;
90  } else
91  return yuv420_bgr32_ssse3;
92  case AV_PIX_FMT_RGB24:
93  return yuv420_rgb24_ssse3;
94  case AV_PIX_FMT_BGR24:
95  return yuv420_bgr24_ssse3;
96  case AV_PIX_FMT_RGB565:
97  return yuv420_rgb16_ssse3;
98  case AV_PIX_FMT_RGB555:
99  return yuv420_rgb15_ssse3;
100  }
101  }
102 
103  if (EXTERNAL_MMXEXT(cpu_flags)) {
104  switch (c->dstFormat) {
105  case AV_PIX_FMT_RGB24:
106  return yuv420_rgb24_mmxext;
107  case AV_PIX_FMT_BGR24:
108  return yuv420_bgr24_mmxext;
109  }
110  }
111 
112  if (EXTERNAL_MMX(cpu_flags)) {
113  switch (c->dstFormat) {
114  case AV_PIX_FMT_RGB32:
115  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
116 #if CONFIG_SWSCALE_ALPHA
117  return yuva420_rgb32_mmx;
118 #endif
119  break;
120  } else
121  return yuv420_rgb32_mmx;
122  case AV_PIX_FMT_BGR32:
123  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
124 #if CONFIG_SWSCALE_ALPHA
125  return yuva420_bgr32_mmx;
126 #endif
127  break;
128  } else
129  return yuv420_bgr32_mmx;
130  case AV_PIX_FMT_RGB24:
131  return yuv420_rgb24_mmx;
132  case AV_PIX_FMT_BGR24:
133  return yuv420_bgr24_mmx;
134  case AV_PIX_FMT_RGB565:
135  return yuv420_rgb16_mmx;
136  case AV_PIX_FMT_RGB555:
137  return yuv420_rgb15_mmx;
138  }
139  }
140 
141 #endif /* HAVE_X86ASM */
142  return NULL;
143 }
cpu.h
AV_PIX_FMT_BGR32
#define AV_PIX_FMT_BGR32
Definition: pixfmt.h:379
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:98
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:50
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:100
ff_yuv2rgb_init_x86
av_cold SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
Definition: yuv2rgb.c:69
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:377
attributes.h
AV_PIX_FMT_RGB555
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:392
swscale_internal.h
AV_PIX_FMT_RGB565
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:391
EXTERNAL_SSSE3
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:65
SwsContext
Definition: swscale_internal.h:300
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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