FFmpeg
yuv2rgb_template.c
Go to the documentation of this file.
1 /*
2  * software YUV to RGB converter
3  *
4  * Copyright (C) 2001-2007 Michael Niedermayer
5  * (c) 2010 Konstantin Shishkov
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include <stdint.h>
25 
26 #include "libavutil/x86/asm.h"
27 #include "libswscale/swscale_internal.h"
28 
29 #define YUV2RGB_LOOP(depth) \
30  h_size = (c->dstW + 7) & ~7; \
31  if (h_size * depth > FFABS(dstStride[0])) \
32  h_size -= 8; \
33  \
34  vshift = c->srcFormat != AV_PIX_FMT_YUV422P; \
35  \
36  for (y = 0; y < srcSliceH; y++) { \
37  uint8_t *image = dst[0] + (y + srcSliceY) * dstStride[0]; \
38  const uint8_t *py = src[0] + y * srcStride[0]; \
39  const uint8_t *pu = src[1] + (y >> vshift) * srcStride[1]; \
40  const uint8_t *pv = src[2] + (y >> vshift) * srcStride[2]; \
41  x86_reg index = -h_size / 2; \
42 
43 extern void RENAME(ff_yuv_420_rgb24)(x86_reg index, uint8_t *image, const uint8_t *pu_index,
44  const uint8_t *pv_index, const uint64_t *pointer_c_dither,
45  const uint8_t *py_2index);
46 extern void RENAME(ff_yuv_420_bgr24)(x86_reg index, uint8_t *image, const uint8_t *pu_index,
47  const uint8_t *pv_index, const uint64_t *pointer_c_dither,
48  const uint8_t *py_2index);
49 
50 #ifndef COMPILE_TEMPLATE_MMXEXT
51 extern void RENAME(ff_yuv_420_rgb15)(x86_reg index, uint8_t *image, const uint8_t *pu_index,
52  const uint8_t *pv_index, const uint64_t *pointer_c_dither,
53  const uint8_t *py_2index);
54 extern void RENAME(ff_yuv_420_rgb16)(x86_reg index, uint8_t *image, const uint8_t *pu_index,
55  const uint8_t *pv_index, const uint64_t *pointer_c_dither,
56  const uint8_t *py_2index);
57 extern void RENAME(ff_yuv_420_rgb32)(x86_reg index, uint8_t *image, const uint8_t *pu_index,
58  const uint8_t *pv_index, const uint64_t *pointer_c_dither,
59  const uint8_t *py_2index);
60 extern void RENAME(ff_yuv_420_bgr32)(x86_reg index, uint8_t *image, const uint8_t *pu_index,
61  const uint8_t *pv_index, const uint64_t *pointer_c_dither,
62  const uint8_t *py_2index);
63 extern void RENAME(ff_yuva_420_rgb32)(x86_reg index, uint8_t *image, const uint8_t *pu_index,
64  const uint8_t *pv_index, const uint64_t *pointer_c_dither,
65  const uint8_t *py_2index, const uint8_t *pa_2index);
66 extern void RENAME(ff_yuva_420_bgr32)(x86_reg index, uint8_t *image, const uint8_t *pu_index,
67  const uint8_t *pv_index, const uint64_t *pointer_c_dither,
68  const uint8_t *py_2index, const uint8_t *pa_2index);
69 
70 static inline int RENAME(yuv420_rgb15)(SwsContext *c, const uint8_t *src[],
71  int srcStride[],
72  int srcSliceY, int srcSliceH,
73  uint8_t *dst[], int dstStride[])
74 {
75  int y, h_size, vshift;
76 
77  YUV2RGB_LOOP(2)
78 
79 #ifdef DITHER1XBPP
80  c->blueDither = ff_dither8[y & 1];
81  c->greenDither = ff_dither8[y & 1];
82  c->redDither = ff_dither8[(y + 1) & 1];
83 #endif
84 
85  RENAME(ff_yuv_420_rgb15)(index, image, pu - index, pv - index, &(c->redDither), py - 2 * index);
86  }
87  return srcSliceH;
88 }
89 
90 static inline int RENAME(yuv420_rgb16)(SwsContext *c, const uint8_t *src[],
91  int srcStride[],
92  int srcSliceY, int srcSliceH,
93  uint8_t *dst[], int dstStride[])
94 {
95  int y, h_size, vshift;
96 
97  YUV2RGB_LOOP(2)
98 
99 #ifdef DITHER1XBPP
100  c->blueDither = ff_dither8[y & 1];
101  c->greenDither = ff_dither4[y & 1];
102  c->redDither = ff_dither8[(y + 1) & 1];
103 #endif
104 
105  RENAME(ff_yuv_420_rgb16)(index, image, pu - index, pv - index, &(c->redDither), py - 2 * index);
106  }
107  return srcSliceH;
108 }
109 
110 static inline int RENAME(yuv420_rgb32)(SwsContext *c, const uint8_t *src[],
111  int srcStride[],
112  int srcSliceY, int srcSliceH,
113  uint8_t *dst[], int dstStride[])
114 {
115  int y, h_size, vshift;
116 
117  YUV2RGB_LOOP(4)
118 
119  RENAME(ff_yuv_420_rgb32)(index, image, pu - index, pv - index, &(c->redDither), py - 2 * index);
120  }
121  return srcSliceH;
122 }
123 
124 static inline int RENAME(yuv420_bgr32)(SwsContext *c, const uint8_t *src[],
125  int srcStride[],
126  int srcSliceY, int srcSliceH,
127  uint8_t *dst[], int dstStride[])
128 {
129  int y, h_size, vshift;
130 
131  YUV2RGB_LOOP(4)
132 
133  RENAME(ff_yuv_420_bgr32)(index, image, pu - index, pv - index, &(c->redDither), py - 2 * index);
134  }
135  return srcSliceH;
136 }
137 
138 static inline int RENAME(yuva420_rgb32)(SwsContext *c, const uint8_t *src[],
139  int srcStride[],
140  int srcSliceY, int srcSliceH,
141  uint8_t *dst[], int dstStride[])
142 {
143  int y, h_size, vshift;
144  YUV2RGB_LOOP(4)
145 
146  const uint8_t *pa = src[3] + y * srcStride[3];
147  RENAME(ff_yuva_420_rgb32)(index, image, pu - index, pv - index, &(c->redDither), py - 2 * index, pa - 2 * index);
148  }
149  return srcSliceH;
150 }
151 
152 static inline int RENAME(yuva420_bgr32)(SwsContext *c, const uint8_t *src[],
153  int srcStride[],
154  int srcSliceY, int srcSliceH,
155  uint8_t *dst[], int dstStride[])
156 {
157  int y, h_size, vshift;
158 
159  YUV2RGB_LOOP(4)
160 
161  const uint8_t *pa = src[3] + y * srcStride[3];
162  RENAME(ff_yuva_420_bgr32)(index, image, pu - index, pv - index, &(c->redDither), py - 2 * index, pa - 2 * index);
163  }
164  return srcSliceH;
165 }
166 #endif
167 
168 #if !defined(COMPILE_TEMPLATE_MMX)
169 static inline int RENAME(yuv420_rgb24)(SwsContext *c, const uint8_t *src[],
170  int srcStride[],
171  int srcSliceY, int srcSliceH,
172  uint8_t *dst[], int dstStride[])
173 {
174  int y, h_size, vshift;
175 
176  YUV2RGB_LOOP(3)
177 
178  RENAME(ff_yuv_420_rgb24)(index, image, pu - index, pv - index, &(c->redDither), py - 2 * index);
179  }
180  return srcSliceH;
181 }
182 
183 static inline int RENAME(yuv420_bgr24)(SwsContext *c, const uint8_t *src[],
184  int srcStride[],
185  int srcSliceY, int srcSliceH,
186  uint8_t *dst[], int dstStride[])
187 {
188  int y, h_size, vshift;
189 
190  YUV2RGB_LOOP(3)
191 
192  RENAME(ff_yuv_420_bgr24)(index, image, pu - index, pv - index, &(c->redDither), py - 2 * index);
193  }
194  return srcSliceH;
195 }
196 #endif
YUV2RGB_LOOP
#define YUV2RGB_LOOP(depth)
Definition: yuv2rgb_template.c:29
ff_dither4
const uint64_t ff_dither4[2]
Definition: swscale.c:33
index
int index
Definition: gxfenc.c:89
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
asm.h
srcSliceH
return srcSliceH
Definition: yuv2rgb_template.c:87
swscale_internal.h
pv
#define pv
Definition: regdef.h:60
ff_dither8
const uint64_t ff_dither8[2]
Definition: swscale.c:37
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
x86_reg
int x86_reg
Definition: asm.h:72
SwsContext
Definition: swscale_internal.h:299
RENAME
#define RENAME(name)
Definition: ffv1dec.c:117
Generated on Mon Dec 5 2022 19:22:25 for FFmpeg by   doxygen 1.8.17