FFmpeg  4.4.6
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"
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  return 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 } \
54 
55 #define DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS(yuvx) \
56 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, argb) \
57 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, rgba) \
58 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, abgr) \
59 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, bgra) \
60 
63 
64 #define DECLARE_FF_NVX_TO_RGBX_FUNCS(ifmt, ofmt) \
65 int ff_##ifmt##_to_##ofmt##_neon(int w, int h, \
66  uint8_t *dst, int linesize, \
67  const uint8_t *srcY, int linesizeY, \
68  const uint8_t *srcC, int linesizeC, \
69  const int16_t *table, \
70  int y_offset, \
71  int y_coeff); \
72  \
73 static int ifmt##_to_##ofmt##_neon_wrapper(SwsContext *c, const uint8_t *src[], \
74  int srcStride[], int srcSliceY, int srcSliceH, \
75  uint8_t *dst[], int dstStride[]) { \
76  const int16_t yuv2rgb_table[] = { YUV_TO_RGB_TABLE }; \
77  \
78  return ff_##ifmt##_to_##ofmt##_neon(c->srcW, srcSliceH, \
79  dst[0] + srcSliceY * dstStride[0], dstStride[0], \
80  src[0], srcStride[0], src[1], srcStride[1], \
81  yuv2rgb_table, \
82  c->yuv2rgb_y_offset >> 6, \
83  c->yuv2rgb_y_coeff); \
84 } \
85 
86 #define DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nvx) \
87 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, argb) \
88 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, rgba) \
89 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, abgr) \
90 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, bgra) \
91 
94 
95 /* We need a 16 pixel width alignment. This constraint can easily be removed
96  * for input reading but for the output which is 4-bytes per pixel (RGBA) the
97  * assembly might be writing as much as 4*15=60 extra bytes at the end of the
98  * line, which won't fit the 32-bytes buffer alignment. */
99 #define SET_FF_NVX_TO_RGBX_FUNC(ifmt, IFMT, ofmt, OFMT, accurate_rnd) do { \
100  if (c->srcFormat == AV_PIX_FMT_##IFMT \
101  && c->dstFormat == AV_PIX_FMT_##OFMT \
102  && !(c->srcH & 1) \
103  && !(c->srcW & 15) \
104  && !accurate_rnd) \
105  c->swscale = ifmt##_to_##ofmt##_neon_wrapper; \
106 } while (0)
107 
108 #define SET_FF_NVX_TO_ALL_RGBX_FUNC(nvx, NVX, accurate_rnd) do { \
109  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, argb, ARGB, accurate_rnd); \
110  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, rgba, RGBA, accurate_rnd); \
111  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, abgr, ABGR, accurate_rnd); \
112  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, bgra, BGRA, accurate_rnd); \
113 } while (0)
114 
116  int accurate_rnd = c->flags & SWS_ACCURATE_RND;
117 
118  SET_FF_NVX_TO_ALL_RGBX_FUNC(nv12, NV12, accurate_rnd);
119  SET_FF_NVX_TO_ALL_RGBX_FUNC(nv21, NV21, accurate_rnd);
120  SET_FF_NVX_TO_ALL_RGBX_FUNC(yuv420p, YUV420P, accurate_rnd);
121  SET_FF_NVX_TO_ALL_RGBX_FUNC(yuv422p, YUV422P, accurate_rnd);
122 }
123 
125 {
126  int cpu_flags = av_get_cpu_flags();
127  if (have_neon(cpu_flags))
129 }
#define have_neon(flags)
Definition: cpu.h:26
#define SET_FF_NVX_TO_ALL_RGBX_FUNC(nvx, NVX, accurate_rnd)
#define DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nvx)
void ff_get_unscaled_swscale_aarch64(SwsContext *c)
static void get_unscaled_swscale_neon(SwsContext *c)
#define DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS(yuvx)
static atomic_int cpu_flags
Definition: cpu.c:50
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
#define SWS_ACCURATE_RND
Definition: swscale.h:83
external API header
static double c[64]