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vf_transpose.c
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1 /*
2  * Copyright (c) 2010 Stefano Sabatini
3  * Copyright (c) 2008 Vitor Sessak
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * transposition filter
25  * Based on MPlayer libmpcodecs/vf_rotate.c.
26  */
27 
28 #include <stdio.h>
29 
30 #include "libavutil/imgutils.h"
31 #include "libavutil/internal.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/pixdesc.h"
35 
36 #include "avfilter.h"
37 #include "formats.h"
38 #include "internal.h"
39 #include "video.h"
40 
41 typedef enum {
46 
52 };
53 
54 typedef struct TransContext {
55  const AVClass *class;
56  int hsub, vsub;
57  int pixsteps[4];
58 
59  int passthrough; ///< PassthroughType, landscape passthrough mode enabled
60  int dir; ///< TransposeDir
61 } TransContext;
62 
64 {
66  int fmt, ret;
67 
68  for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
70  if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
73  desc->log2_chroma_w != desc->log2_chroma_h) &&
74  (ret = ff_add_format(&pix_fmts, fmt)) < 0)
75  return ret;
76  }
77 
78 
79  return ff_set_common_formats(ctx, pix_fmts);
80 }
81 
82 static int config_props_output(AVFilterLink *outlink)
83 {
84  AVFilterContext *ctx = outlink->src;
85  TransContext *s = ctx->priv;
86  AVFilterLink *inlink = ctx->inputs[0];
87  const AVPixFmtDescriptor *desc_out = av_pix_fmt_desc_get(outlink->format);
88  const AVPixFmtDescriptor *desc_in = av_pix_fmt_desc_get(inlink->format);
89 
90  if (s->dir&4) {
92  "dir values greater than 3 are deprecated, use the passthrough option instead\n");
93  s->dir &= 3;
95  }
96 
97  if ((inlink->w >= inlink->h && s->passthrough == TRANSPOSE_PT_TYPE_LANDSCAPE) ||
98  (inlink->w <= inlink->h && s->passthrough == TRANSPOSE_PT_TYPE_PORTRAIT)) {
100  "w:%d h:%d -> w:%d h:%d (passthrough mode)\n",
101  inlink->w, inlink->h, inlink->w, inlink->h);
102  return 0;
103  } else {
105  }
106 
107  s->hsub = desc_in->log2_chroma_w;
108  s->vsub = desc_in->log2_chroma_h;
109 
111 
112  outlink->w = inlink->h;
113  outlink->h = inlink->w;
114 
115  if (inlink->sample_aspect_ratio.num)
116  outlink->sample_aspect_ratio = av_div_q((AVRational) { 1, 1 },
117  inlink->sample_aspect_ratio);
118  else
119  outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
120 
121  av_log(ctx, AV_LOG_VERBOSE,
122  "w:%d h:%d dir:%d -> w:%d h:%d rotation:%s vflip:%d\n",
123  inlink->w, inlink->h, s->dir, outlink->w, outlink->h,
124  s->dir == 1 || s->dir == 3 ? "clockwise" : "counterclockwise",
125  s->dir == 0 || s->dir == 3);
126  return 0;
127 }
128 
129 static AVFrame *get_video_buffer(AVFilterLink *inlink, int w, int h)
130 {
131  TransContext *s = inlink->dst->priv;
132 
133  return s->passthrough ?
134  ff_null_get_video_buffer (inlink, w, h) :
135  ff_default_get_video_buffer(inlink, w, h);
136 }
137 
138 typedef struct ThreadData {
139  AVFrame *in, *out;
140 } ThreadData;
141 
142 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr,
143  int nb_jobs)
144 {
145  TransContext *s = ctx->priv;
146  ThreadData *td = arg;
147  AVFrame *out = td->out;
148  AVFrame *in = td->in;
149  int plane;
150 
151  for (plane = 0; out->data[plane]; plane++) {
152  int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
153  int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
154  int pixstep = s->pixsteps[plane];
155  int inh = AV_CEIL_RSHIFT(in->height, vsub);
156  int outw = AV_CEIL_RSHIFT(out->width, hsub);
157  int outh = AV_CEIL_RSHIFT(out->height, vsub);
158  int start = (outh * jobnr ) / nb_jobs;
159  int end = (outh * (jobnr+1)) / nb_jobs;
160  uint8_t *dst, *src;
161  int dstlinesize, srclinesize;
162  int x, y;
163 
164  dstlinesize = out->linesize[plane];
165  dst = out->data[plane] + start * dstlinesize;
166  src = in->data[plane];
167  srclinesize = in->linesize[plane];
168 
169  if (s->dir & 1) {
170  src += in->linesize[plane] * (inh - 1);
171  srclinesize *= -1;
172  }
173 
174  if (s->dir & 2) {
175  dst = out->data[plane] + dstlinesize * (outh - start - 1);
176  dstlinesize *= -1;
177  }
178 
179  switch (pixstep) {
180  case 1:
181  for (y = start; y < end; y++, dst += dstlinesize)
182  for (x = 0; x < outw; x++)
183  dst[x] = src[x * srclinesize + y];
184  break;
185  case 2:
186  for (y = start; y < end; y++, dst += dstlinesize) {
187  for (x = 0; x < outw; x++)
188  *((uint16_t *)(dst + 2 * x)) =
189  *((uint16_t *)(src + x * srclinesize + y * 2));
190  }
191  break;
192  case 3:
193  for (y = start; y < end; y++, dst += dstlinesize) {
194  for (x = 0; x < outw; x++) {
195  int32_t v = AV_RB24(src + x * srclinesize + y * 3);
196  AV_WB24(dst + 3 * x, v);
197  }
198  }
199  break;
200  case 4:
201  for (y = start; y < end; y++, dst += dstlinesize) {
202  for (x = 0; x < outw; x++)
203  *((uint32_t *)(dst + 4 * x)) =
204  *((uint32_t *)(src + x * srclinesize + y * 4));
205  }
206  break;
207  case 6:
208  for (y = start; y < end; y++, dst += dstlinesize) {
209  for (x = 0; x < outw; x++) {
210  int64_t v = AV_RB48(src + x * srclinesize + y*6);
211  AV_WB48(dst + 6*x, v);
212  }
213  }
214  break;
215  case 8:
216  for (y = start; y < end; y++, dst += dstlinesize) {
217  for (x = 0; x < outw; x++)
218  *((uint64_t *)(dst + 8*x)) = *((uint64_t *)(src + x * srclinesize + y*8));
219  }
220  break;
221  }
222  }
223 
224  return 0;
225 }
226 
227 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
228 {
229  AVFilterContext *ctx = inlink->dst;
230  TransContext *s = ctx->priv;
231  AVFilterLink *outlink = ctx->outputs[0];
232  ThreadData td;
233  AVFrame *out;
234 
235  if (s->passthrough)
236  return ff_filter_frame(outlink, in);
237 
238  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
239  if (!out) {
240  av_frame_free(&in);
241  return AVERROR(ENOMEM);
242  }
243  av_frame_copy_props(out, in);
244 
245  if (in->sample_aspect_ratio.num == 0) {
247  } else {
250  }
251 
252  td.in = in, td.out = out;
253  ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(outlink->h, ctx->graph->nb_threads));
254  av_frame_free(&in);
255  return ff_filter_frame(outlink, out);
256 }
257 
258 #define OFFSET(x) offsetof(TransContext, x)
259 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
260 
261 static const AVOption transpose_options[] = {
262  { "dir", "set transpose direction", OFFSET(dir), AV_OPT_TYPE_INT, { .i64 = TRANSPOSE_CCLOCK_FLIP }, 0, 7, FLAGS, "dir" },
263  { "cclock_flip", "rotate counter-clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK_FLIP }, .unit = "dir" },
264  { "clock", "rotate clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK }, .unit = "dir" },
265  { "cclock", "rotate counter-clockwise", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CCLOCK }, .unit = "dir" },
266  { "clock_flip", "rotate clockwise with vertical flip", 0, AV_OPT_TYPE_CONST, { .i64 = TRANSPOSE_CLOCK_FLIP }, .unit = "dir" },
267 
268  { "passthrough", "do not apply transposition if the input matches the specified geometry",
269  OFFSET(passthrough), AV_OPT_TYPE_INT, {.i64=TRANSPOSE_PT_TYPE_NONE}, 0, INT_MAX, FLAGS, "passthrough" },
270  { "none", "always apply transposition", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_NONE}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
271  { "portrait", "preserve portrait geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_PORTRAIT}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
272  { "landscape", "preserve landscape geometry", 0, AV_OPT_TYPE_CONST, {.i64=TRANSPOSE_PT_TYPE_LANDSCAPE}, INT_MIN, INT_MAX, FLAGS, "passthrough" },
273 
274  { NULL }
275 };
276 
278 
280  {
281  .name = "default",
282  .type = AVMEDIA_TYPE_VIDEO,
283  .get_video_buffer = get_video_buffer,
284  .filter_frame = filter_frame,
285  },
286  { NULL }
287 };
288 
290  {
291  .name = "default",
292  .config_props = config_props_output,
293  .type = AVMEDIA_TYPE_VIDEO,
294  },
295  { NULL }
296 };
297 
299  .name = "transpose",
300  .description = NULL_IF_CONFIG_SMALL("Transpose input video."),
301  .priv_size = sizeof(TransContext),
302  .priv_class = &transpose_class,
304  .inputs = avfilter_vf_transpose_inputs,
305  .outputs = avfilter_vf_transpose_outputs,
307 };
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
int plane
Definition: avisynth_c.h:291
#define NULL
Definition: coverity.c:32
#define AV_RB48(x)
Definition: intreadwrite.h:472
const char * s
Definition: avisynth_c.h:631
AVFILTER_DEFINE_CLASS(transpose)
AVFrame * out
Definition: af_sofalizer.c:585
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2193
This structure describes decoded (raw) audio or video data.
Definition: frame.h:180
AVOption.
Definition: opt.h:245
AVFormatContext * ctx
Definition: movenc-test.c:48
const char * fmt
Definition: avisynth_c.h:632
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:89
TransposeDir
Definition: vf_transpose.c:47
int num
numerator
Definition: rational.h:44
AVFrame * ff_null_get_video_buffer(AVFilterLink *link, int w, int h)
Definition: video.c:38
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:76
AVFilter ff_vf_transpose
Definition: vf_transpose.c:298
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
static const AVFilterPad avfilter_vf_transpose_outputs[]
Definition: vf_transpose.c:289
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:322
void av_image_fill_max_pixsteps(int max_pixsteps[4], int max_pixstep_comps[4], const AVPixFmtDescriptor *pixdesc)
Compute the max pixel step for each plane of an image with a format described by pixdesc.
Definition: imgutils.c:34
const char * name
Pad name.
Definition: internal.h:59
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:313
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1180
AVFrame * in
Definition: af_sofalizer.c:585
uint8_t
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
#define AV_WB48(p, darg)
Definition: intreadwrite.h:481
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:804
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:53
int width
width and height of the video frame
Definition: frame.h:232
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
#define td
Definition: regdef.h:70
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:153
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
AVRational av_div_q(AVRational b, AVRational c)
Divide one rational by another.
Definition: rational.c:88
void * priv
private data for use by the filter
Definition: avfilter.h:320
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:114
const char * arg
Definition: jacosubdec.c:66
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:337
int pixsteps[4]
Definition: vf_transpose.c:57
common internal API header
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
#define FFMIN(a, b)
Definition: common.h:96
int32_t
#define AV_WB24(p, d)
Definition: intreadwrite.h:450
static int query_formats(AVFilterContext *ctx)
Definition: vf_transpose.c:63
#define FLAGS
Definition: vf_transpose.c:259
PassthroughType
Definition: vf_transpose.c:41
static const AVOption transpose_options[]
Definition: vf_transpose.c:261
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
#define src
Definition: vp9dsp.c:530
FILE * out
Definition: movenc-test.c:54
int passthrough
PassthroughType, landscape passthrough mode enabled.
Definition: vf_transpose.c:59
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_RB24
Definition: bytestream.h:87
static AVFrame * get_video_buffer(AVFilterLink *inlink, int w, int h)
Definition: vf_transpose.c:129
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:211
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int dir
TransposeDir.
Definition: vf_transpose.c:60
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:259
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:142
rational number numerator/denominator
Definition: rational.h:43
const char * name
Filter name.
Definition: avfilter.h:146
GLsizei GLboolean transpose
Definition: opengl_enc.c:109
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:136
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:317
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:345
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:194
AVFrame * ff_default_get_video_buffer(AVFilterLink *link, int w, int h)
Definition: video.c:43
int den
denominator
Definition: rational.h:45
avfilter_execute_func * execute
Definition: internal.h:153
#define OFFSET(x)
Definition: vf_transpose.c:258
static const AVFilterPad avfilter_vf_transpose_inputs[]
Definition: vf_transpose.c:279
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:305
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_transpose.c:142
int height
Definition: frame.h:232
void INT64 start
Definition: avisynth_c.h:553
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_transpose.c:227
internal API functions
static int config_props_output(AVFilterLink *outlink)
Definition: vf_transpose.c:82
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:574
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58