FFmpeg  4.0
swscale_unscaled.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include "config.h"
20 #include "libswscale/swscale.h"
21 #include "libswscale/swscale_internal.h"
22 #include "libavutil/aarch64/cpu.h"
23 
24 #define YUV_TO_RGB_TABLE \
25  c->yuv2rgb_v2r_coeff, \
26  c->yuv2rgb_u2g_coeff, \
27  c->yuv2rgb_v2g_coeff, \
28  c->yuv2rgb_u2b_coeff, \
29 
30 #define DECLARE_FF_YUVX_TO_RGBX_FUNCS(ifmt, ofmt) \
31 int ff_##ifmt##_to_##ofmt##_neon(int w, int h, \
32  uint8_t *dst, int linesize, \
33  const uint8_t *srcY, int linesizeY, \
34  const uint8_t *srcU, int linesizeU, \
35  const uint8_t *srcV, int linesizeV, \
36  const int16_t *table, \
37  int y_offset, \
38  int y_coeff); \
39  \
40 static int ifmt##_to_##ofmt##_neon_wrapper(SwsContext *c, const uint8_t *src[], \
41  int srcStride[], int srcSliceY, int srcSliceH, \
42  uint8_t *dst[], int dstStride[]) { \
43  const int16_t yuv2rgb_table[] = { YUV_TO_RGB_TABLE }; \
44  \
45  ff_##ifmt##_to_##ofmt##_neon(c->srcW, srcSliceH, \
46  dst[0] + srcSliceY * dstStride[0], dstStride[0], \
47  src[0], srcStride[0], \
48  src[1], srcStride[1], \
49  src[2], srcStride[2], \
50  yuv2rgb_table, \
51  c->yuv2rgb_y_offset >> 6, \
52  c->yuv2rgb_y_coeff); \
53  return 0; \
54 } \
55 
56 #define DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS(yuvx) \
57 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, argb) \
58 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, rgba) \
59 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, abgr) \
60 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, bgra) \
61 
62 DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS(yuv420p)
63 DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS(yuv422p)
64 
65 #define DECLARE_FF_NVX_TO_RGBX_FUNCS(ifmt, ofmt) \
66 int ff_##ifmt##_to_##ofmt##_neon(int w, int h, \
67  uint8_t *dst, int linesize, \
68  const uint8_t *srcY, int linesizeY, \
69  const uint8_t *srcC, int linesizeC, \
70  const int16_t *table, \
71  int y_offset, \
72  int y_coeff); \
73  \
74 static int ifmt##_to_##ofmt##_neon_wrapper(SwsContext *c, const uint8_t *src[], \
75  int srcStride[], int srcSliceY, int srcSliceH, \
76  uint8_t *dst[], int dstStride[]) { \
77  const int16_t yuv2rgb_table[] = { YUV_TO_RGB_TABLE }; \
78  \
79  ff_##ifmt##_to_##ofmt##_neon(c->srcW, srcSliceH, \
80  dst[0] + srcSliceY * dstStride[0], dstStride[0], \
81  src[0], srcStride[0], src[1], srcStride[1], \
82  yuv2rgb_table, \
83  c->yuv2rgb_y_offset >> 6, \
84  c->yuv2rgb_y_coeff); \
85  \
86  return 0; \
87 } \
88 
89 #define DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nvx) \
90 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, argb) \
91 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, rgba) \
92 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, abgr) \
93 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, bgra) \
94 
95 DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nv12)
96 DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nv21)
97 
98 /* We need a 16 pixel width alignment. This constraint can easily be removed
99  * for input reading but for the output which is 4-bytes per pixel (RGBA) the
100  * assembly might be writing as much as 4*15=60 extra bytes at the end of the
101  * line, which won't fit the 32-bytes buffer alignment. */
102 #define SET_FF_NVX_TO_RGBX_FUNC(ifmt, IFMT, ofmt, OFMT, accurate_rnd) do { \
103  if (c->srcFormat == AV_PIX_FMT_##IFMT \
104  && c->dstFormat == AV_PIX_FMT_##OFMT \
105  && !(c->srcH & 1) \
106  && !(c->srcW & 15) \
107  && !accurate_rnd) \
108  c->swscale = ifmt##_to_##ofmt##_neon_wrapper; \
109 } while (0)
110 
111 #define SET_FF_NVX_TO_ALL_RGBX_FUNC(nvx, NVX, accurate_rnd) do { \
112  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, argb, ARGB, accurate_rnd); \
113  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, rgba, RGBA, accurate_rnd); \
114  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, abgr, ABGR, accurate_rnd); \
115  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, bgra, BGRA, accurate_rnd); \
116 } while (0)
117 
118 static void get_unscaled_swscale_neon(SwsContext *c) {
119  int accurate_rnd = c->flags & SWS_ACCURATE_RND;
120 
121  SET_FF_NVX_TO_ALL_RGBX_FUNC(nv12, NV12, accurate_rnd);
122  SET_FF_NVX_TO_ALL_RGBX_FUNC(nv21, NV21, accurate_rnd);
123  SET_FF_NVX_TO_ALL_RGBX_FUNC(yuv420p, YUV420P, accurate_rnd);
124  SET_FF_NVX_TO_ALL_RGBX_FUNC(yuv422p, YUV422P, accurate_rnd);
125 }
126 
127 void ff_get_unscaled_swscale_aarch64(SwsContext *c)
128 {
129  int cpu_flags = av_get_cpu_flags();
130  if (have_neon(cpu_flags))
131  get_unscaled_swscale_neon(c);
132 }
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:50
SET_FF_NVX_TO_ALL_RGBX_FUNC
#define SET_FF_NVX_TO_ALL_RGBX_FUNC(nvx, NVX, accurate_rnd)
Definition: swscale_unscaled.c:111
swscale.h
external API header
have_neon
#define have_neon(flags)
Definition: cpu.h:26
swscale_internal.h
ff_get_unscaled_swscale_aarch64
void ff_get_unscaled_swscale_aarch64(SwsContext *c)
Definition: swscale_unscaled.c:127
DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS
#define DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nvx)
Definition: swscale_unscaled.c:89
SWS_ACCURATE_RND
#define SWS_ACCURATE_RND
Definition: swscale.h:83
get_unscaled_swscale_neon
static void get_unscaled_swscale_neon(SwsContext *c)
Definition: swscale_unscaled.c:118
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
SwsContext::flags
int flags
Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
Definition: swscale_internal.h:395
DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS
#define DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS(yuvx)
Definition: swscale_unscaled.c:56
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