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 /* hope these constant values are cache line aligned */
45 DECLARE_ASM_CONST(8, uint64_t, mmx_00ffw) = 0x00ff00ff00ff00ffULL;
46 DECLARE_ASM_CONST(8, uint64_t, mmx_redmask) = 0xf8f8f8f8f8f8f8f8ULL;
47 DECLARE_ASM_CONST(8, uint64_t, mmx_grnmask) = 0xfcfcfcfcfcfcfcfcULL;
48 DECLARE_ASM_CONST(8, uint64_t, pb_e0) = 0xe0e0e0e0e0e0e0e0ULL;
49 DECLARE_ASM_CONST(8, uint64_t, pb_03) = 0x0303030303030303ULL;
50 DECLARE_ASM_CONST(8, uint64_t, pb_07) = 0x0707070707070707ULL;
51 
52 //MMX versions
53 #if HAVE_MMX
54 #undef RENAME
55 #undef COMPILE_TEMPLATE_MMXEXT
56 #define COMPILE_TEMPLATE_MMXEXT 0
57 #define RENAME(a) a ## _mmx
58 #include "yuv2rgb_template.c"
59 #endif /* HAVE_MMX */
60 
61 // MMXEXT versions
62 #if HAVE_MMXEXT
63 #undef RENAME
64 #undef COMPILE_TEMPLATE_MMXEXT
65 #define COMPILE_TEMPLATE_MMXEXT 1
66 #define RENAME(a) a ## _mmxext
67 #include "yuv2rgb_template.c"
68 #endif /* HAVE_MMXEXT */
69 
70 //SSSE3 versions
71 #if HAVE_SSSE3
72 #undef RENAME
73 #undef COMPILE_TEMPLATE_MMXEXT
74 #define COMPILE_TEMPLATE_MMXEXT 0
75 #define RENAME(a) a ## _ssse3
76 #include "yuv2rgb_template.c"
77 #endif
78 
79 #endif /* HAVE_X86ASM */
80 
81 av_cold SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
82 {
83 #if HAVE_X86ASM
84  int cpu_flags = av_get_cpu_flags();
85 
86  if (EXTERNAL_SSSE3(cpu_flags)) {
87  switch (c->dstFormat) {
88  case AV_PIX_FMT_RGB32:
89  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
90 #if CONFIG_SWSCALE_ALPHA
91  return yuva420_rgb32_ssse3;
92 #endif
93  break;
94  } else
95  return yuv420_rgb32_ssse3;
96  case AV_PIX_FMT_BGR32:
97  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
98 #if CONFIG_SWSCALE_ALPHA
99  return yuva420_bgr32_ssse3;
100 #endif
101  break;
102  } else
103  return yuv420_bgr32_ssse3;
104  case AV_PIX_FMT_RGB24:
105  return yuv420_rgb24_ssse3;
106  case AV_PIX_FMT_BGR24:
107  return yuv420_bgr24_ssse3;
108  case AV_PIX_FMT_RGB565:
109  return yuv420_rgb16_ssse3;
110  case AV_PIX_FMT_RGB555:
111  return yuv420_rgb15_ssse3;
112  }
113  }
114 
115  if (EXTERNAL_MMXEXT(cpu_flags)) {
116  switch (c->dstFormat) {
117  case AV_PIX_FMT_RGB24:
118  return yuv420_rgb24_mmxext;
119  case AV_PIX_FMT_BGR24:
120  return yuv420_bgr24_mmxext;
121  }
122  }
123 
124  if (EXTERNAL_MMX(cpu_flags)) {
125  switch (c->dstFormat) {
126  case AV_PIX_FMT_RGB32:
127  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
128 #if CONFIG_SWSCALE_ALPHA
129  return yuva420_rgb32_mmx;
130 #endif
131  break;
132  } else
133  return yuv420_rgb32_mmx;
134  case AV_PIX_FMT_BGR32:
135  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
136 #if CONFIG_SWSCALE_ALPHA
137  return yuva420_bgr32_mmx;
138 #endif
139  break;
140  } else
141  return yuv420_bgr32_mmx;
142  case AV_PIX_FMT_RGB24:
143  return yuv420_rgb24_mmx;
144  case AV_PIX_FMT_BGR24:
145  return yuv420_bgr24_mmx;
146  case AV_PIX_FMT_RGB565:
147  return yuv420_rgb16_mmx;
148  case AV_PIX_FMT_RGB555:
149  return yuv420_rgb15_mmx;
150  }
151  }
152 
153 #endif /* HAVE_X86ASM */
154  return NULL;
155 }
cpu.h
AV_PIX_FMT_BGR32
#define AV_PIX_FMT_BGR32
Definition: pixfmt.h:372
DECLARE_ASM_CONST
#define DECLARE_ASM_CONST(n, t, v)
Definition: mem.h:114
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:93
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:82
ff_yuv2rgb_init_x86
av_cold SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
Definition: yuv2rgb.c:81
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:370
attributes.h
AV_PIX_FMT_RGB555
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:385
swscale_internal.h
AV_PIX_FMT_RGB565
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:384
EXTERNAL_SSSE3
#define EXTERNAL_SSSE3(flags)
Definition: cpu.h:65
SwsContext
Definition: swscale_internal.h:280
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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