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vf_boxblur.c
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1 /*
2  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
3  * Copyright (c) 2011 Stefano Sabatini
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (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
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20  */
21 
22 /**
23  * @file
24  * Apply a boxblur filter to the input video.
25  * Ported from MPlayer libmpcodecs/vf_boxblur.c.
26  */
27 
28 #include "libavutil/avstring.h"
29 #include "libavutil/common.h"
30 #include "libavutil/eval.h"
31 #include "libavutil/opt.h"
32 #include "libavutil/pixdesc.h"
33 #include "avfilter.h"
34 #include "formats.h"
35 #include "internal.h"
36 #include "video.h"
37 
38 static const char *const var_names[] = {
39  "w",
40  "h",
41  "cw",
42  "ch",
43  "hsub",
44  "vsub",
45  NULL
46 };
47 
48 enum var_name {
56 };
57 
58 typedef struct FilterParam {
59  int radius;
60  int power;
61  char *radius_expr;
62 } FilterParam;
63 
64 typedef struct BoxBlurContext {
65  const AVClass *class;
69 
70  int hsub, vsub;
71  int radius[4];
72  int power[4];
73  uint8_t *temp[2]; ///< temporary buffer used in blur_power()
75 
76 #define Y 0
77 #define U 1
78 #define V 2
79 #define A 3
80 
82 {
83  BoxBlurContext *s = ctx->priv;
84 
85  if (!s->luma_param.radius_expr) {
86  av_log(ctx, AV_LOG_ERROR, "Luma radius expression is not set.\n");
87  return AVERROR(EINVAL);
88  }
89 
90  /* fill missing params */
91  if (!s->chroma_param.radius_expr) {
93  if (!s->chroma_param.radius_expr)
94  return AVERROR(ENOMEM);
95  }
96  if (s->chroma_param.power < 0)
98 
99  if (!s->alpha_param.radius_expr) {
101  if (!s->alpha_param.radius_expr)
102  return AVERROR(ENOMEM);
103  }
104  if (s->alpha_param.power < 0)
106 
107  return 0;
108 }
109 
111 {
112  BoxBlurContext *s = ctx->priv;
113 
114  av_freep(&s->temp[0]);
115  av_freep(&s->temp[1]);
116 }
117 
119 {
121  int fmt, ret;
122 
123  for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
124  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
126  (desc->flags & AV_PIX_FMT_FLAG_PLANAR || desc->nb_components == 1) &&
127  (!(desc->flags & AV_PIX_FMT_FLAG_BE) == !HAVE_BIGENDIAN || desc->comp[0].depth == 8) &&
128  (ret = ff_add_format(&formats, fmt)) < 0)
129  return ret;
130  }
131 
132  return ff_set_common_formats(ctx, formats);
133 }
134 
135 static int config_input(AVFilterLink *inlink)
136 {
137  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
138  AVFilterContext *ctx = inlink->dst;
139  BoxBlurContext *s = ctx->priv;
140  int w = inlink->w, h = inlink->h;
141  int cw, ch;
142  double var_values[VARS_NB], res;
143  char *expr;
144  int ret;
145 
146  if (!(s->temp[0] = av_malloc(2*FFMAX(w, h))) ||
147  !(s->temp[1] = av_malloc(2*FFMAX(w, h))))
148  return AVERROR(ENOMEM);
149 
150  s->hsub = desc->log2_chroma_w;
151  s->vsub = desc->log2_chroma_h;
152 
153  var_values[VAR_W] = inlink->w;
154  var_values[VAR_H] = inlink->h;
155  var_values[VAR_CW] = cw = w>>s->hsub;
156  var_values[VAR_CH] = ch = h>>s->vsub;
157  var_values[VAR_HSUB] = 1<<s->hsub;
158  var_values[VAR_VSUB] = 1<<s->vsub;
159 
160 #define EVAL_RADIUS_EXPR(comp) \
161  expr = s->comp##_param.radius_expr; \
162  ret = av_expr_parse_and_eval(&res, expr, var_names, var_values, \
163  NULL, NULL, NULL, NULL, NULL, 0, ctx); \
164  s->comp##_param.radius = res; \
165  if (ret < 0) { \
166  av_log(NULL, AV_LOG_ERROR, \
167  "Error when evaluating " #comp " radius expression '%s'\n", expr); \
168  return ret; \
169  }
170  EVAL_RADIUS_EXPR(luma);
173 
174  av_log(ctx, AV_LOG_VERBOSE,
175  "luma_radius:%d luma_power:%d "
176  "chroma_radius:%d chroma_power:%d "
177  "alpha_radius:%d alpha_power:%d "
178  "w:%d chroma_w:%d h:%d chroma_h:%d\n",
182  w, cw, h, ch);
183 
184 #define CHECK_RADIUS_VAL(w_, h_, comp) \
185  if (s->comp##_param.radius < 0 || \
186  2*s->comp##_param.radius > FFMIN(w_, h_)) { \
187  av_log(ctx, AV_LOG_ERROR, \
188  "Invalid " #comp " radius value %d, must be >= 0 and <= %d\n", \
189  s->comp##_param.radius, FFMIN(w_, h_)/2); \
190  return AVERROR(EINVAL); \
191  }
192  CHECK_RADIUS_VAL(w, h, luma);
193  CHECK_RADIUS_VAL(cw, ch, chroma);
194  CHECK_RADIUS_VAL(w, h, alpha);
195 
196  s->radius[Y] = s->luma_param.radius;
197  s->radius[U] = s->radius[V] = s->chroma_param.radius;
198  s->radius[A] = s->alpha_param.radius;
199 
200  s->power[Y] = s->luma_param.power;
201  s->power[U] = s->power[V] = s->chroma_param.power;
202  s->power[A] = s->alpha_param.power;
203 
204  return 0;
205 }
206 
207 /* Naive boxblur would sum source pixels from x-radius .. x+radius
208  * for destination pixel x. That would be O(radius*width).
209  * If you now look at what source pixels represent 2 consecutive
210  * output pixels, then you see they are almost identical and only
211  * differ by 2 pixels, like:
212  * src0 111111111
213  * dst0 1
214  * src1 111111111
215  * dst1 1
216  * src0-src1 1 -1
217  * so when you know one output pixel you can find the next by just adding
218  * and subtracting 1 input pixel.
219  * The following code adopts this faster variant.
220  */
221 #define BLUR(type, depth) \
222 static inline void blur ## depth(type *dst, int dst_step, const type *src, \
223  int src_step, int len, int radius) \
224 { \
225  const int length = radius*2 + 1; \
226  const int inv = ((1<<16) + length/2)/length; \
227  int x, sum = src[radius*src_step]; \
228  \
229  for (x = 0; x < radius; x++) \
230  sum += src[x*src_step]<<1; \
231  \
232  sum = sum*inv + (1<<15); \
233  \
234  for (x = 0; x <= radius; x++) { \
235  sum += (src[(radius+x)*src_step] - src[(radius-x)*src_step])*inv; \
236  dst[x*dst_step] = sum>>16; \
237  } \
238  \
239  for (; x < len-radius; x++) { \
240  sum += (src[(radius+x)*src_step] - src[(x-radius-1)*src_step])*inv; \
241  dst[x*dst_step] = sum >>16; \
242  } \
243  \
244  for (; x < len; x++) { \
245  sum += (src[(2*len-radius-x-1)*src_step] - src[(x-radius-1)*src_step])*inv; \
246  dst[x*dst_step] = sum>>16; \
247  } \
248 }
249 
250 BLUR(uint8_t, 8)
251 BLUR(uint16_t, 16)
252 
253 #undef BLUR
254 
255 static inline void blur(uint8_t *dst, int dst_step, const uint8_t *src, int src_step,
256  int len, int radius, int pixsize)
257 {
258  if (pixsize == 1) blur8 (dst, dst_step , src, src_step , len, radius);
259  else blur16((uint16_t*)dst, dst_step>>1, (const uint16_t*)src, src_step>>1, len, radius);
260 }
261 
262 static inline void blur_power(uint8_t *dst, int dst_step, const uint8_t *src, int src_step,
263  int len, int radius, int power, uint8_t *temp[2], int pixsize)
264 {
265  uint8_t *a = temp[0], *b = temp[1];
266 
267  if (radius && power) {
268  blur(a, pixsize, src, src_step, len, radius, pixsize);
269  for (; power > 2; power--) {
270  uint8_t *c;
271  blur(b, pixsize, a, pixsize, len, radius, pixsize);
272  c = a; a = b; b = c;
273  }
274  if (power > 1) {
275  blur(dst, dst_step, a, pixsize, len, radius, pixsize);
276  } else {
277  int i;
278  if (pixsize == 1) {
279  for (i = 0; i < len; i++)
280  dst[i*dst_step] = a[i];
281  } else
282  for (i = 0; i < len; i++)
283  *(uint16_t*)(dst + i*dst_step) = ((uint16_t*)a)[i];
284  }
285  } else {
286  int i;
287  if (pixsize == 1) {
288  for (i = 0; i < len; i++)
289  dst[i*dst_step] = src[i*src_step];
290  } else
291  for (i = 0; i < len; i++)
292  *(uint16_t*)(dst + i*dst_step) = *(uint16_t*)(src + i*src_step);
293  }
294 }
295 
296 static void hblur(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize,
297  int w, int h, int radius, int power, uint8_t *temp[2], int pixsize)
298 {
299  int y;
300 
301  if (radius == 0 && dst == src)
302  return;
303 
304  for (y = 0; y < h; y++)
305  blur_power(dst + y*dst_linesize, pixsize, src + y*src_linesize, pixsize,
306  w, radius, power, temp, pixsize);
307 }
308 
309 static void vblur(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize,
310  int w, int h, int radius, int power, uint8_t *temp[2], int pixsize)
311 {
312  int x;
313 
314  if (radius == 0 && dst == src)
315  return;
316 
317  for (x = 0; x < w; x++)
318  blur_power(dst + x*pixsize, dst_linesize, src + x*pixsize, src_linesize,
319  h, radius, power, temp, pixsize);
320 }
321 
322 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
323 {
324  AVFilterContext *ctx = inlink->dst;
325  BoxBlurContext *s = ctx->priv;
326  AVFilterLink *outlink = inlink->dst->outputs[0];
327  AVFrame *out;
328  int plane;
329  int cw = AV_CEIL_RSHIFT(inlink->w, s->hsub), ch = AV_CEIL_RSHIFT(in->height, s->vsub);
330  int w[4] = { inlink->w, cw, cw, inlink->w };
331  int h[4] = { in->height, ch, ch, in->height };
332  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
333  const int depth = desc->comp[0].depth;
334  const int pixsize = (depth+7)/8;
335 
336  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
337  if (!out) {
338  av_frame_free(&in);
339  return AVERROR(ENOMEM);
340  }
341  av_frame_copy_props(out, in);
342 
343  for (plane = 0; plane < 4 && in->data[plane] && in->linesize[plane]; plane++)
344  hblur(out->data[plane], out->linesize[plane],
345  in ->data[plane], in ->linesize[plane],
346  w[plane], h[plane], s->radius[plane], s->power[plane],
347  s->temp, pixsize);
348 
349  for (plane = 0; plane < 4 && in->data[plane] && in->linesize[plane]; plane++)
350  vblur(out->data[plane], out->linesize[plane],
351  out->data[plane], out->linesize[plane],
352  w[plane], h[plane], s->radius[plane], s->power[plane],
353  s->temp, pixsize);
354 
355  av_frame_free(&in);
356 
357  return ff_filter_frame(outlink, out);
358 }
359 
360 #define OFFSET(x) offsetof(BoxBlurContext, x)
361 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
362 
363 static const AVOption boxblur_options[] = {
364  { "luma_radius", "Radius of the luma blurring box", OFFSET(luma_param.radius_expr), AV_OPT_TYPE_STRING, {.str="2"}, .flags = FLAGS },
365  { "lr", "Radius of the luma blurring box", OFFSET(luma_param.radius_expr), AV_OPT_TYPE_STRING, {.str="2"}, .flags = FLAGS },
366  { "luma_power", "How many times should the boxblur be applied to luma", OFFSET(luma_param.power), AV_OPT_TYPE_INT, {.i64=2}, 0, INT_MAX, .flags = FLAGS },
367  { "lp", "How many times should the boxblur be applied to luma", OFFSET(luma_param.power), AV_OPT_TYPE_INT, {.i64=2}, 0, INT_MAX, .flags = FLAGS },
368 
369  { "chroma_radius", "Radius of the chroma blurring box", OFFSET(chroma_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
370  { "cr", "Radius of the chroma blurring box", OFFSET(chroma_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
371  { "chroma_power", "How many times should the boxblur be applied to chroma", OFFSET(chroma_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
372  { "cp", "How many times should the boxblur be applied to chroma", OFFSET(chroma_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
373 
374  { "alpha_radius", "Radius of the alpha blurring box", OFFSET(alpha_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
375  { "ar", "Radius of the alpha blurring box", OFFSET(alpha_param.radius_expr), AV_OPT_TYPE_STRING, {.str=NULL}, .flags = FLAGS },
376  { "alpha_power", "How many times should the boxblur be applied to alpha", OFFSET(alpha_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
377  { "ap", "How many times should the boxblur be applied to alpha", OFFSET(alpha_param.power), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, .flags = FLAGS },
378 
379  { NULL }
380 };
381 
382 AVFILTER_DEFINE_CLASS(boxblur);
383 
385  {
386  .name = "default",
387  .type = AVMEDIA_TYPE_VIDEO,
388  .config_props = config_input,
389  .filter_frame = filter_frame,
390  },
391  { NULL }
392 };
393 
395  {
396  .name = "default",
397  .type = AVMEDIA_TYPE_VIDEO,
398  },
399  { NULL }
400 };
401 
403  .name = "boxblur",
404  .description = NULL_IF_CONFIG_SMALL("Blur the input."),
405  .priv_size = sizeof(BoxBlurContext),
406  .priv_class = &boxblur_class,
407  .init = init,
408  .uninit = uninit,
410  .inputs = avfilter_vf_boxblur_inputs,
411  .outputs = avfilter_vf_boxblur_outputs,
413 };
#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
static void hblur(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int w, int h, int radius, int power, uint8_t *temp[2], int pixsize)
Definition: vf_boxblur.c:296
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
#define U
Definition: vf_boxblur.c:77
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2157
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
AVOption.
Definition: opt.h:245
AVFormatContext * ctx
Definition: movenc-test.c:48
const char * fmt
Definition: avisynth_c.h:632
Main libavfilter public API header.
else temp
Definition: vf_mcdeint.c:259
static int config_input(AVFilterLink *inlink)
Definition: vf_boxblur.c:135
const char * b
Definition: vf_curves.c:109
static void blur(uint8_t *dst, int dst_step, const uint8_t *src, int src_step, int len, int radius, int pixsize)
Definition: vf_boxblur.c:255
static enum AVSampleFormat formats[]
static av_cold int init(AVFilterContext *ctx)
Definition: vf_boxblur.c:81
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
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:122
const char * name
Pad name.
Definition: internal.h:59
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1163
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
uint8_t * temp[2]
temporary buffer used in blur_power()
Definition: vf_boxblur.c:73
AVOptions.
#define Y
Definition: vf_boxblur.c:76
#define A
Definition: vf_boxblur.c:79
static const AVFilterPad avfilter_vf_boxblur_outputs[]
Definition: vf_boxblur.c:394
char * radius_expr
Definition: vf_boxblur.c:61
static const AVOption boxblur_options[]
Definition: vf_boxblur.c:363
FilterParam alpha_param
Definition: vf_boxblur.c:68
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define OFFSET(x)
Definition: vf_boxblur.c:360
#define av_log(a,...)
static void blur_power(uint8_t *dst, int dst_step, const uint8_t *src, int src_step, int len, int radius, int power, uint8_t *temp[2], int pixsize)
Definition: vf_boxblur.c:262
A filter pad used for either input or output.
Definition: internal.h:53
static double alpha(void *priv, double x, double y)
Definition: vf_geq.c:99
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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
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:154
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
void * priv
private data for use by the filter
Definition: avfilter.h:319
static int query_formats(AVFilterContext *ctx)
Definition: vf_boxblur.c:118
int radius[4]
Definition: vf_boxblur.c:71
#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
static const AVFilterPad avfilter_vf_boxblur_inputs[]
Definition: vf_boxblur.c:384
#define FFMAX(a, b)
Definition: common.h:94
#define V
Definition: vf_boxblur.c:78
int depth
Definition: v4l.c:62
var_name
Definition: aeval.c:46
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
#define FLAGS
Definition: vf_boxblur.c:361
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
FilterParam luma_param
Definition: vf_boxblur.c:66
#define BLUR(type, depth)
Definition: vf_boxblur.c:221
static const char *const var_names[]
Definition: vf_boxblur.c:38
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:385
#define src
Definition: vp9dsp.c:530
int power[4]
Definition: vf_boxblur.c:72
FILE * out
Definition: movenc-test.c:54
#define EVAL_RADIUS_EXPR(comp)
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:375
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:209
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_boxblur.c:322
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
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:141
static void vblur(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int w, int h, int radius, int power, uint8_t *temp[2], int pixsize)
Definition: vf_boxblur.c:309
static void chroma(WaveformContext *s, AVFrame *in, AVFrame *out, int component, int intensity, int offset, int column)
Definition: vf_waveform.c:740
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_boxblur.c:110
const char * name
Filter name.
Definition: avfilter.h:145
AVFILTER_DEFINE_CLASS(boxblur)
#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:316
static int flags
Definition: cpu.c:47
AVFilter ff_vf_boxblur
Definition: vf_boxblur.c:402
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
common internal and external API header
#define CHECK_RADIUS_VAL(w_, h_, comp)
static double c[64]
FilterParam chroma_param
Definition: vf_boxblur.c:67
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:128
int len
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:304
int height
Definition: frame.h:230
#define av_freep(p)
internal API functions
int depth
Number of bits in the component.
Definition: pixdesc.h:58
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:564
simple arithmetic expression evaluator
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58