FFmpeg
yuv2rgb.c
Go to the documentation of this file.
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"
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_INLINE_ASM
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_INLINE && HAVE_6REGS
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_INLINE && HAVE_6REGS */
60 
61 // MMXEXT versions
62 #if HAVE_MMXEXT_INLINE && HAVE_6REGS
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_INLINE && HAVE_6REGS */
69 
70 #endif /* HAVE_INLINE_ASM */
71 
73 {
74 #if HAVE_MMX_INLINE && HAVE_6REGS
76 
77 #if HAVE_MMXEXT_INLINE
78  if (INLINE_MMXEXT(cpu_flags)) {
79  switch (c->dstFormat) {
80  case AV_PIX_FMT_RGB24:
81  return yuv420_rgb24_mmxext;
82  case AV_PIX_FMT_BGR24:
83  return yuv420_bgr24_mmxext;
84  }
85  }
86 #endif
87 
88  if (INLINE_MMX(cpu_flags)) {
89  switch (c->dstFormat) {
90  case AV_PIX_FMT_RGB32:
91  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
92 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
93  return yuva420_rgb32_mmx;
94 #endif
95  break;
96  } else
97  return yuv420_rgb32_mmx;
98  case AV_PIX_FMT_BGR32:
99  if (c->srcFormat == AV_PIX_FMT_YUVA420P) {
100 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
101  return yuva420_bgr32_mmx;
102 #endif
103  break;
104  } else
105  return yuv420_bgr32_mmx;
106  case AV_PIX_FMT_RGB24:
107  return yuv420_rgb24_mmx;
108  case AV_PIX_FMT_BGR24:
109  return yuv420_bgr24_mmx;
110  case AV_PIX_FMT_RGB565:
111  return yuv420_rgb16_mmx;
112  case AV_PIX_FMT_RGB555:
113  return yuv420_rgb15_mmx;
114  }
115  }
116 #endif /* HAVE_MMX_INLINE && HAVE_6REGS */
117 
118  return NULL;
119 }
#define NULL
Definition: coverity.c:32
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
av_cold SwsFunc ff_yuv2rgb_init_x86(SwsContext *c)
Definition: yuv2rgb.c:72
static atomic_int cpu_flags
Definition: cpu.c:50
Macro definitions for various function/variable attributes.
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
#define av_cold
Definition: attributes.h:82
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
external API header
enum AVPixelFormat dstFormat
Destination pixel format.
#define INLINE_MMX(flags)
Definition: cpu.h:86
#define DECLARE_ASM_CONST(n, t, v)
Declare a static constant aligned variable appropriate for use in inline assembly code...
Definition: mem.h:114
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
int(* SwsFunc)(struct SwsContext *context, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
#define AV_PIX_FMT_BGR32
Definition: pixfmt.h:362
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:360
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
#define INLINE_MMXEXT(flags)
Definition: cpu.h:87
enum AVPixelFormat srcFormat
Source pixel format.
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:375
#define AV_PIX_FMT_RGB565
Definition: pixfmt.h:374