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swscale_unscaled.c
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1 /*
2  * Copyright (C) 2013 Xiaolei Yu <dreifachstein@gmail.com>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "config.h"
22 #include "libswscale/swscale.h"
23 #include "libswscale/swscale_internal.h"
24 #include "libavutil/arm/cpu.h"
25 
26 #if HAVE_AS_DN_DIRECTIVE
27 extern void rgbx_to_nv12_neon_32(const uint8_t *src, uint8_t *y, uint8_t *chroma,
28  int width, int height,
29  int y_stride, int c_stride, int src_stride,
30  int32_t coeff_tbl[9]);
31 
32 extern void rgbx_to_nv12_neon_16(const uint8_t *src, uint8_t *y, uint8_t *chroma,
33  int width, int height,
34  int y_stride, int c_stride, int src_stride,
35  int32_t coeff_tbl[9]);
36 
37 static int rgbx_to_nv12_neon_32_wrapper(SwsContext *context, const uint8_t *src[],
38  int srcStride[], int srcSliceY, int srcSliceH,
39  uint8_t *dst[], int dstStride[]) {
40 
41  rgbx_to_nv12_neon_32(src[0] + srcSliceY * srcStride[0],
42  dst[0] + srcSliceY * dstStride[0],
43  dst[1] + (srcSliceY / 2) * dstStride[1],
44  context->srcW, srcSliceH,
45  dstStride[0], dstStride[1], srcStride[0],
46  context->input_rgb2yuv_table);
47 
48  return 0;
49 }
50 
51 static int rgbx_to_nv12_neon_16_wrapper(SwsContext *context, const uint8_t *src[],
52  int srcStride[], int srcSliceY, int srcSliceH,
53  uint8_t *dst[], int dstStride[]) {
54 
55  rgbx_to_nv12_neon_16(src[0] + srcSliceY * srcStride[0],
56  dst[0] + srcSliceY * dstStride[0],
57  dst[1] + (srcSliceY / 2) * dstStride[1],
58  context->srcW, srcSliceH,
59  dstStride[0], dstStride[1], srcStride[0],
60  context->input_rgb2yuv_table);
61 
62  return 0;
63 }
64 
65 #define YUV_TO_RGB_TABLE \
66  c->yuv2rgb_v2r_coeff, \
67  c->yuv2rgb_u2g_coeff, \
68  c->yuv2rgb_v2g_coeff, \
69  c->yuv2rgb_u2b_coeff, \
70 
71 #define DECLARE_FF_YUVX_TO_RGBX_FUNCS(ifmt, ofmt) \
72 int ff_##ifmt##_to_##ofmt##_neon(int w, int h, \
73  uint8_t *dst, int linesize, \
74  const uint8_t *srcY, int linesizeY, \
75  const uint8_t *srcU, int linesizeU, \
76  const uint8_t *srcV, int linesizeV, \
77  const int16_t *table, \
78  int y_offset, \
79  int y_coeff); \
80  \
81 static int ifmt##_to_##ofmt##_neon_wrapper(SwsContext *c, const uint8_t *src[], \
82  int srcStride[], int srcSliceY, int srcSliceH, \
83  uint8_t *dst[], int dstStride[]) { \
84  const int16_t yuv2rgb_table[] = { YUV_TO_RGB_TABLE }; \
85  \
86  ff_##ifmt##_to_##ofmt##_neon(c->srcW, srcSliceH, \
87  dst[0] + srcSliceY * dstStride[0], dstStride[0], \
88  src[0], srcStride[0], \
89  src[1], srcStride[1], \
90  src[2], srcStride[2], \
91  yuv2rgb_table, \
92  c->yuv2rgb_y_offset >> 6, \
93  c->yuv2rgb_y_coeff); \
94  \
95  return 0; \
96 } \
97 
98 #define DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS(yuvx) \
99 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, argb) \
100 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, rgba) \
101 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, abgr) \
102 DECLARE_FF_YUVX_TO_RGBX_FUNCS(yuvx, bgra) \
103 
104 DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS(yuv420p)
105 DECLARE_FF_YUVX_TO_ALL_RGBX_FUNCS(yuv422p)
106 
107 #define DECLARE_FF_NVX_TO_RGBX_FUNCS(ifmt, ofmt) \
108 int ff_##ifmt##_to_##ofmt##_neon(int w, int h, \
109  uint8_t *dst, int linesize, \
110  const uint8_t *srcY, int linesizeY, \
111  const uint8_t *srcC, int linesizeC, \
112  const int16_t *table, \
113  int y_offset, \
114  int y_coeff); \
115  \
116 static int ifmt##_to_##ofmt##_neon_wrapper(SwsContext *c, const uint8_t *src[], \
117  int srcStride[], int srcSliceY, int srcSliceH, \
118  uint8_t *dst[], int dstStride[]) { \
119  const int16_t yuv2rgb_table[] = { YUV_TO_RGB_TABLE }; \
120  \
121  ff_##ifmt##_to_##ofmt##_neon(c->srcW, srcSliceH, \
122  dst[0] + srcSliceY * dstStride[0], dstStride[0], \
123  src[0], srcStride[0], src[1], srcStride[1], \
124  yuv2rgb_table, \
125  c->yuv2rgb_y_offset >> 6, \
126  c->yuv2rgb_y_coeff); \
127  \
128  return 0; \
129 } \
130 
131 #define DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nvx) \
132 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, argb) \
133 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, rgba) \
134 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, abgr) \
135 DECLARE_FF_NVX_TO_RGBX_FUNCS(nvx, bgra) \
136 
137 DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nv12)
138 DECLARE_FF_NVX_TO_ALL_RGBX_FUNCS(nv21)
139 
140 /* We need a 16 pixel width alignment. This constraint can easily be removed
141  * for input reading but for the output which is 4-bytes per pixel (RGBA) the
142  * assembly might be writing as much as 4*15=60 extra bytes at the end of the
143  * line, which won't fit the 32-bytes buffer alignment. */
144 #define SET_FF_NVX_TO_RGBX_FUNC(ifmt, IFMT, ofmt, OFMT, accurate_rnd) do { \
145  if (c->srcFormat == AV_PIX_FMT_##IFMT \
146  && c->dstFormat == AV_PIX_FMT_##OFMT \
147  && !(c->srcH & 1) \
148  && !(c->srcW & 15) \
149  && !accurate_rnd) { \
150  c->swscale = ifmt##_to_##ofmt##_neon_wrapper; \
151  } \
152 } while (0)
153 
154 #define SET_FF_NVX_TO_ALL_RGBX_FUNC(nvx, NVX, accurate_rnd) do { \
155  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, argb, ARGB, accurate_rnd); \
156  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, rgba, RGBA, accurate_rnd); \
157  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, abgr, ABGR, accurate_rnd); \
158  SET_FF_NVX_TO_RGBX_FUNC(nvx, NVX, bgra, BGRA, accurate_rnd); \
159 } while (0)
160 
161 static void get_unscaled_swscale_neon(SwsContext *c) {
162  int accurate_rnd = c->flags & SWS_ACCURATE_RND;
163  if (c->srcFormat == AV_PIX_FMT_RGBA
164  && c->dstFormat == AV_PIX_FMT_NV12
165  && (c->srcW >= 16)) {
166  c->swscale = accurate_rnd ? rgbx_to_nv12_neon_32_wrapper
167  : rgbx_to_nv12_neon_16_wrapper;
168  }
169 
170  SET_FF_NVX_TO_ALL_RGBX_FUNC(nv12, NV12, accurate_rnd);
171  SET_FF_NVX_TO_ALL_RGBX_FUNC(nv21, NV21, accurate_rnd);
172  SET_FF_NVX_TO_ALL_RGBX_FUNC(yuv420p, YUV420P, accurate_rnd);
173  SET_FF_NVX_TO_ALL_RGBX_FUNC(yuv422p, YUV422P, accurate_rnd);
174 }
175 
176 void ff_get_unscaled_swscale_arm(SwsContext *c)
177 {
178  int cpu_flags = av_get_cpu_flags();
179  if (have_neon(cpu_flags))
180  get_unscaled_swscale_neon(c);
181 }
182 #else
183 void ff_get_unscaled_swscale_arm(SwsContext *c)
184 {
185 }
186 #endif
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
src
#define src
Definition: vp8dsp.c:254
uint8_t
uint8_t
Definition: audio_convert.c:194
height
#define height
swscale.h
external API header
SwsContext::dstFormat
enum AVPixelFormat dstFormat
Destination pixel format.
Definition: swscale_internal.h:300
chroma
static av_always_inline void chroma(WaveformContext *s, AVFrame *in, AVFrame *out, int component, int intensity, int offset_y, int offset_x, int column, int mirror, int jobnr, int nb_jobs)
Definition: vf_waveform.c:1511
AV_PIX_FMT_NV12
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
Definition: pixfmt.h:89
AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
have_neon
#define have_neon(flags)
Definition: cpu.h:26
width
#define width
int32_t
int32_t
Definition: audio_convert.c:194
swscale_internal.h
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
ff_get_unscaled_swscale_arm
void ff_get_unscaled_swscale_arm(SwsContext *c)
Definition: swscale_unscaled.c:183
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
SwsContext::srcFormat
enum AVPixelFormat srcFormat
Source pixel format.
Definition: swscale_internal.h:301
SwsContext::swscale
SwsFunc swscale
Note that src, dst, srcStride, dstStride will be copied in the sws_scale() wrapper so they can be fre...
Definition: swscale_internal.h:290
SwsContext::input_rgb2yuv_table
int32_t input_rgb2yuv_table[16+40 *4]
Definition: swscale_internal.h:405
SwsContext::srcW
int srcW
Width of source luma/alpha planes.
Definition: swscale_internal.h:291
SwsContext::flags
int flags
Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
Definition: swscale_internal.h:397
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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