FFmpeg: libavfilter/vf_libopencv.c Source File

FFmpeg
vf_libopencv.c
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1 /*
2  * Copyright (c) 2010 Stefano Sabatini
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 /**
22  * @file
23  * libopencv wrapper functions
24  */
25 
26 #include "config.h"
27 #if HAVE_OPENCV2_CORE_CORE_C_H
28 #include <opencv2/core/core_c.h>
29 #include <opencv2/imgproc/imgproc_c.h>
30 #else
31 #include <opencv/cv.h>
32 #include <opencv/cxcore.h>
33 #endif
34 #include "libavutil/avstring.h"
35 #include "libavutil/common.h"
36 #include "libavutil/file.h"
37 #include "libavutil/opt.h"
38 #include "avfilter.h"
39 #include "formats.h"
40 #include "internal.h"
41 #include "video.h"
42 
43  static void fill_iplimage_from_frame(IplImage *img, const AVFrame *frame, enum AVPixelFormat pixfmt)
44 {
45  IplImage *tmpimg;
46  int depth, channels_nb;
47 
48  if (pixfmt == AV_PIX_FMT_GRAY8) { depth = IPL_DEPTH_8U; channels_nb = 1; }
49  else if (pixfmt == AV_PIX_FMT_BGRA) { depth = IPL_DEPTH_8U; channels_nb = 4; }
50  else if (pixfmt == AV_PIX_FMT_BGR24) { depth = IPL_DEPTH_8U; channels_nb = 3; }
51  else return;
52 
53  tmpimg = cvCreateImageHeader((CvSize){frame->width, frame->height}, depth, channels_nb);
54  *img = *tmpimg;
55  img->imageData = img->imageDataOrigin = frame->data[0];
56  img->dataOrder = IPL_DATA_ORDER_PIXEL;
57  img->origin = IPL_ORIGIN_TL;
58  img->widthStep = frame->linesize[0];
59 }
60 
61  static void fill_frame_from_iplimage(AVFrame *frame, const IplImage *img, enum AVPixelFormat pixfmt)
62 {
63  frame->linesize[0] = img->widthStep;
64  frame->data[0] = img->imageData;
65 }
66 
67  static int query_formats(AVFilterContext *ctx)
68 {
69  static const enum AVPixelFormat pix_fmts[] = {
70  AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
71  };
72  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
73  if (!fmts_list)
74  return AVERROR(ENOMEM);
75  return ff_set_common_formats(ctx, fmts_list);
76 }
77 
78  typedef struct OCVContext {
79   const AVClass *class;
80   char *name;
81   char *params;
82   int (*init)(AVFilterContext *ctx, const char *args);
83   void (*uninit)(AVFilterContext *ctx);
84   void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg);
85   void *priv;
86 } OCVContext;
87 
88  typedef struct SmoothContext {
89   int type;
90   int param1, param2;
91   double param3, param4;
92 } SmoothContext;
93 
94  static av_cold int smooth_init(AVFilterContext *ctx, const char *args)
95 {
96  OCVContext *s = ctx->priv;
97  SmoothContext *smooth = s->priv;
98  char type_str[128] = "gaussian";
99 
100  smooth->param1 = 3;
101  smooth->param2 = 0;
102  smooth->param3 = 0.0;
103  smooth->param4 = 0.0;
104 
105  if (args)
106  sscanf(args, "%127[^|]|%d|%d|%lf|%lf", type_str, &smooth->param1, &smooth->param2, &smooth->param3, &smooth->param4);
107 
108  if (!strcmp(type_str, "blur" )) smooth->type = CV_BLUR;
109  else if (!strcmp(type_str, "blur_no_scale")) smooth->type = CV_BLUR_NO_SCALE;
110  else if (!strcmp(type_str, "median" )) smooth->type = CV_MEDIAN;
111  else if (!strcmp(type_str, "gaussian" )) smooth->type = CV_GAUSSIAN;
112  else if (!strcmp(type_str, "bilateral" )) smooth->type = CV_BILATERAL;
113  else {
114  av_log(ctx, AV_LOG_ERROR, "Smoothing type '%s' unknown.\n", type_str);
115  return AVERROR(EINVAL);
116  }
117 
118  if (smooth->param1 < 0 || !(smooth->param1%2)) {
119  av_log(ctx, AV_LOG_ERROR,
120  "Invalid value '%d' for param1, it has to be a positive odd number\n",
121  smooth->param1);
122  return AVERROR(EINVAL);
123  }
124  if ((smooth->type == CV_BLUR || smooth->type == CV_BLUR_NO_SCALE || smooth->type == CV_GAUSSIAN) &&
125  (smooth->param2 < 0 || (smooth->param2 && !(smooth->param2%2)))) {
126  av_log(ctx, AV_LOG_ERROR,
127  "Invalid value '%d' for param2, it has to be zero or a positive odd number\n",
128  smooth->param2);
129  return AVERROR(EINVAL);
130  }
131 
132  av_log(ctx, AV_LOG_VERBOSE, "type:%s param1:%d param2:%d param3:%f param4:%f\n",
133  type_str, smooth->param1, smooth->param2, smooth->param3, smooth->param4);
134  return 0;
135 }
136 
137  static void smooth_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
138 {
139  OCVContext *s = ctx->priv;
140  SmoothContext *smooth = s->priv;
141  cvSmooth(inimg, outimg, smooth->type, smooth->param1, smooth->param2, smooth->param3, smooth->param4);
142 }
143 
144  static int read_shape_from_file(int *cols, int *rows, int **values, const char *filename,
145  void *log_ctx)
146 {
147  uint8_t *buf, *p, *pend;
148  size_t size;
149  int ret, i, j, w;
150 
151  if ((ret = av_file_map(filename, &buf, &size, 0, log_ctx)) < 0)
152  return ret;
153 
154  /* prescan file to get the number of lines and the maximum width */
155  w = 0;
156  for (i = 0; i < size; i++) {
157  if (buf[i] == '\n') {
158  if (*rows == INT_MAX) {
159  av_log(log_ctx, AV_LOG_ERROR, "Overflow on the number of rows in the file\n");
160  ret = AVERROR_INVALIDDATA;
161  goto end;
162  }
163  ++(*rows);
164  *cols = FFMAX(*cols, w);
165  w = 0;
166  } else if (w == INT_MAX) {
167  av_log(log_ctx, AV_LOG_ERROR, "Overflow on the number of columns in the file\n");
168  return AVERROR_INVALIDDATA;
169  }
170  w++;
171  }
172  if (*rows > (SIZE_MAX / sizeof(int) / *cols)) {
173  av_log(log_ctx, AV_LOG_ERROR, "File with size %dx%d is too big\n",
174  *rows, *cols);
175  ret = AVERROR_INVALIDDATA;
176  goto end;
177  }
178  if (!(*values = av_mallocz_array(sizeof(int) * *rows, *cols))) {
179  ret = AVERROR(ENOMEM);
180  goto end;
181  }
182 
183  /* fill *values */
184  p = buf;
185  pend = buf + size-1;
186  for (i = 0; i < *rows; i++) {
187  for (j = 0;; j++) {
188  if (p > pend || *p == '\n') {
189  p++;
190  break;
191  } else
192  (*values)[*cols*i + j] = !!av_isgraph(*(p++));
193  }
194  }
195 
196 end:
197  av_file_unmap(buf, size);
198 
199 #ifdef DEBUG
200  {
201  char *line;
202  if (!(line = av_malloc(*cols + 1)))
203  return AVERROR(ENOMEM);
204  for (i = 0; i < *rows; i++) {
205  for (j = 0; j < *cols; j++)
206  line[j] = (*values)[i * *cols + j] ? '@' : ' ';
207  line[j] = 0;
208  av_log(log_ctx, AV_LOG_DEBUG, "%3d: %s\n", i, line);
209  }
210  av_free(line);
211  }
212 #endif
213 
214  return 0;
215 }
216 
217  static int parse_iplconvkernel(IplConvKernel **kernel, char *buf, void *log_ctx)
218 {
219  char shape_filename[128] = "", shape_str[32] = "rect";
220  int cols = 0, rows = 0, anchor_x = 0, anchor_y = 0, shape = CV_SHAPE_RECT;
221  int *values = NULL, ret = 0;
222 
223  sscanf(buf, "%dx%d+%dx%d/%32[^=]=%127s", &cols, &rows, &anchor_x, &anchor_y, shape_str, shape_filename);
224 
225  if (!strcmp(shape_str, "rect" )) shape = CV_SHAPE_RECT;
226  else if (!strcmp(shape_str, "cross" )) shape = CV_SHAPE_CROSS;
227  else if (!strcmp(shape_str, "ellipse")) shape = CV_SHAPE_ELLIPSE;
228  else if (!strcmp(shape_str, "custom" )) {
229  shape = CV_SHAPE_CUSTOM;
230  if ((ret = read_shape_from_file(&cols, &rows, &values, shape_filename, log_ctx)) < 0)
231  return ret;
232  } else {
233  av_log(log_ctx, AV_LOG_ERROR,
234  "Shape unspecified or type '%s' unknown.\n", shape_str);
235  ret = AVERROR(EINVAL);
236  goto out;
237  }
238 
239  if (rows <= 0 || cols <= 0) {
240  av_log(log_ctx, AV_LOG_ERROR,
241  "Invalid non-positive values for shape size %dx%d\n", cols, rows);
242  ret = AVERROR(EINVAL);
243  goto out;
244  }
245 
246  if (anchor_x < 0 || anchor_y < 0 || anchor_x >= cols || anchor_y >= rows) {
247  av_log(log_ctx, AV_LOG_ERROR,
248  "Shape anchor %dx%d is not inside the rectangle with size %dx%d.\n",
249  anchor_x, anchor_y, cols, rows);
250  ret = AVERROR(EINVAL);
251  goto out;
252  }
253 
254  *kernel = cvCreateStructuringElementEx(cols, rows, anchor_x, anchor_y, shape, values);
255  if (!*kernel) {
256  ret = AVERROR(ENOMEM);
257  goto out;
258  }
259 
260  av_log(log_ctx, AV_LOG_VERBOSE, "Structuring element: w:%d h:%d x:%d y:%d shape:%s\n",
261  rows, cols, anchor_x, anchor_y, shape_str);
262 out:
263  av_freep(&values);
264  return ret;
265 }
266 
267  typedef struct DilateContext {
268   int nb_iterations;
269   IplConvKernel *kernel;
270 } DilateContext;
271 
272  static av_cold int dilate_init(AVFilterContext *ctx, const char *args)
273 {
274  OCVContext *s = ctx->priv;
275  DilateContext *dilate = s->priv;
276  char default_kernel_str[] = "3x3+0x0/rect";
277  char *kernel_str = NULL;
278  const char *buf = args;
279  int ret;
280 
281  if (args) {
282  kernel_str = av_get_token(&buf, "|");
283 
284  if (!kernel_str)
285  return AVERROR(ENOMEM);
286  }
287 
288  ret = parse_iplconvkernel(&dilate->kernel,
289  (!kernel_str || !*kernel_str) ? default_kernel_str
290  : kernel_str,
291  ctx);
292  av_free(kernel_str);
293  if (ret < 0)
294  return ret;
295 
296  if (!buf || sscanf(buf, "|%d", &dilate->nb_iterations) != 1)
297  dilate->nb_iterations = 1;
298  av_log(ctx, AV_LOG_VERBOSE, "iterations_nb:%d\n", dilate->nb_iterations);
299  if (dilate->nb_iterations <= 0) {
300  av_log(ctx, AV_LOG_ERROR, "Invalid non-positive value '%d' for nb_iterations\n",
301  dilate->nb_iterations);
302  return AVERROR(EINVAL);
303  }
304  return 0;
305 }
306 
307  static av_cold void dilate_uninit(AVFilterContext *ctx)
308 {
309  OCVContext *s = ctx->priv;
310  DilateContext *dilate = s->priv;
311 
312  cvReleaseStructuringElement(&dilate->kernel);
313 }
314 
315  static void dilate_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
316 {
317  OCVContext *s = ctx->priv;
318  DilateContext *dilate = s->priv;
319  cvDilate(inimg, outimg, dilate->kernel, dilate->nb_iterations);
320 }
321 
322  static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
323 {
324  OCVContext *s = ctx->priv;
325  DilateContext *dilate = s->priv;
326  cvErode(inimg, outimg, dilate->kernel, dilate->nb_iterations);
327 }
328 
329  typedef struct OCVFilterEntry {
330   const char *name;
331   size_t priv_size;
332   int (*init)(AVFilterContext *ctx, const char *args);
333   void (*uninit)(AVFilterContext *ctx);
334   void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg);
335 } OCVFilterEntry;
336 
337  static const OCVFilterEntry ocv_filter_entries[] = {
338  { "dilate", sizeof(DilateContext), dilate_init, dilate_uninit, dilate_end_frame_filter },
339  { "erode", sizeof(DilateContext), dilate_init, dilate_uninit, erode_end_frame_filter },
340  { "smooth", sizeof(SmoothContext), smooth_init, NULL, smooth_end_frame_filter },
341 };
342 
343  static av_cold int init(AVFilterContext *ctx)
344 {
345  OCVContext *s = ctx->priv;
346  int i;
347 
348  if (!s->name) {
349  av_log(ctx, AV_LOG_ERROR, "No libopencv filter name specified\n");
350  return AVERROR(EINVAL);
351  }
352  for (i = 0; i < FF_ARRAY_ELEMS(ocv_filter_entries); i++) {
353  const OCVFilterEntry *entry = &ocv_filter_entries[i];
354  if (!strcmp(s->name, entry->name)) {
355  s->init = entry->init;
356  s->uninit = entry->uninit;
357  s->end_frame_filter = entry->end_frame_filter;
358 
359  if (!(s->priv = av_mallocz(entry->priv_size)))
360  return AVERROR(ENOMEM);
361  return s->init(ctx, s->params);
362  }
363  }
364 
365  av_log(ctx, AV_LOG_ERROR, "No libopencv filter named '%s'\n", s->name);
366  return AVERROR(EINVAL);
367 }
368 
369  static av_cold void uninit(AVFilterContext *ctx)
370 {
371  OCVContext *s = ctx->priv;
372 
373  if (s->uninit)
374  s->uninit(ctx);
375  av_freep(&s->priv);
376 }
377 
378  static int filter_frame(AVFilterLink *inlink, AVFrame *in)
379 {
380  AVFilterContext *ctx = inlink->dst;
381  OCVContext *s = ctx->priv;
382  AVFilterLink *outlink= inlink->dst->outputs[0];
383  AVFrame *out;
384  IplImage inimg, outimg;
385 
386  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
387  if (!out) {
388  av_frame_free(&in);
389  return AVERROR(ENOMEM);
390  }
391  av_frame_copy_props(out, in);
392 
393  fill_iplimage_from_frame(&inimg , in , inlink->format);
394  fill_iplimage_from_frame(&outimg, out, inlink->format);
395  s->end_frame_filter(ctx, &inimg, &outimg);
396  fill_frame_from_iplimage(out, &outimg, inlink->format);
397 
398  av_frame_free(&in);
399 
400  return ff_filter_frame(outlink, out);
401 }
402 
403  #define OFFSET(x) offsetof(OCVContext, x)
404  #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
405  static const AVOption ocv_options[] = {
406  { "filter_name", NULL, OFFSET(name), AV_OPT_TYPE_STRING, .flags = FLAGS },
407  { "filter_params", NULL, OFFSET(params), AV_OPT_TYPE_STRING, .flags = FLAGS },
408  { NULL }
409 };
410 
411 AVFILTER_DEFINE_CLASS(ocv);
412 
413  static const AVFilterPad avfilter_vf_ocv_inputs[] = {
414  {
415  .name = "default",
416  .type = AVMEDIA_TYPE_VIDEO,
417  .filter_frame = filter_frame,
418  },
419  { NULL }
420 };
421 
422  static const AVFilterPad avfilter_vf_ocv_outputs[] = {
423  {
424  .name = "default",
425  .type = AVMEDIA_TYPE_VIDEO,
426  },
427  { NULL }
428 };
429 
430  AVFilter ff_vf_ocv = {
431  .name = "ocv",
432  .description = NULL_IF_CONFIG_SMALL("Apply transform using libopencv."),
433  .priv_size = sizeof(OCVContext),
434  .priv_class = &ocv_class,
435  .query_formats = query_formats,
436  .init = init,
437  .uninit = uninit,
438  .inputs = avfilter_vf_ocv_inputs,
439  .outputs = avfilter_vf_ocv_outputs,
440 };
NULL
#define NULL
Definition: coverity.c:32
s
const char * s
Definition: avisynth_c.h:768
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
parse_iplconvkernel
static int parse_iplconvkernel(IplConvKernel **kernel, char *buf, void *log_ctx)
Definition: vf_libopencv.c:217
OCVContext::name
char * name
Definition: vf_libopencv.c:80
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
AVOption
AVOption.
Definition: opt.h:246
avfilter.h
Main libavfilter public API header.
SmoothContext::param3
double param3
Definition: vf_libopencv.c:91
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(ocv)
AVS_Value
Definition: avisynth_c.h:599
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
OCVFilterEntry::uninit
void(* uninit)(AVFilterContext *ctx)
Definition: vf_libopencv.c:333
FLAGS
#define FLAGS
Definition: vf_libopencv.c:404
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_libopencv.c:378
img
#define img
Definition: vf_colormatrix.c:116
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
smooth_end_frame_filter
static void smooth_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:137
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
opt.h
AVOptions.
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
dilate_uninit
static av_cold void dilate_uninit(AVFilterContext *ctx)
Definition: vf_libopencv.c:307
OCVContext::end_frame_filter
void(* end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:84
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
file.h
Misc file utilities.
AV_OPT_TYPE_STRING
Definition: opt.h:227
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
size
ptrdiff_t size
Definition: opengl_enc.c:101
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
OCVContext::init
int(* init)(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:82
OFFSET
#define OFFSET(x)
Definition: vf_libopencv.c:403
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
AVFrame::width
int width
Definition: frame.h:276
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
av_file_unmap
void av_file_unmap(uint8_t *bufptr, size_t size)
Unmap or free the buffer bufptr created by av_file_map().
Definition: file.c:133
ff_set_common_formats
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
av_file_map
int av_file_map(const char *filename, uint8_t **bufptr, size_t *size, int log_offset, void *log_ctx)
Read the file with name filename, and put its content in a newly allocated buffer or map it with mmap...
Definition: file.c:53
AVERROR
#define AVERROR(e)
Definition: error.h:43
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_libopencv.c:343
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
OCVFilterEntry::name
const char * name
Definition: vf_libopencv.c:330
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:91
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:353
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
params
GLenum GLint * params
Definition: opengl_enc.c:114
line
Definition: graph2dot.c:48
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
av_get_token
char * av_get_token(const char **buf, const char *term)
Unescape the given string until a non escaped terminating char, and return the token corresponding to...
Definition: avstring.c:149
dilate_end_frame_filter
static void dilate_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:315
OCVContext::params
char * params
Definition: vf_libopencv.c:81
w
uint8_t w
Definition: llviddspenc.c:38
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
avfilter_vf_ocv_outputs
static const AVFilterPad avfilter_vf_ocv_outputs[]
Definition: vf_libopencv.c:422
fill_iplimage_from_frame
static void fill_iplimage_from_frame(IplImage *img, const AVFrame *frame, enum AVPixelFormat pixfmt)
Definition: vf_libopencv.c:43
args
AVS_Value args
Definition: avisynth_c.h:699
OCVFilterEntry::end_frame_filter
void(* end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:334
ctx
AVFormatContext * ctx
Definition: movenc.c:48
OCVContext::uninit
void(* uninit)(AVFilterContext *ctx)
Definition: vf_libopencv.c:83
DilateContext::kernel
IplConvKernel * kernel
Definition: vf_libopencv.c:269
AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
inputs
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
OCVContext::priv
void * priv
Definition: vf_libopencv.c:85
avfilter_vf_ocv_inputs
static const AVFilterPad avfilter_vf_ocv_inputs[]
Definition: vf_libopencv.c:413
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
dilate_init
static av_cold int dilate_init(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:272
in
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
Definition: audio_convert.c:194
ff_vf_ocv
AVFilter ff_vf_ocv
Definition: vf_libopencv.c:430
buf
void * buf
Definition: avisynth_c.h:690
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_libopencv.c:369
SmoothContext::param4
double param4
Definition: vf_libopencv.c:91
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVFilter
Filter definition.
Definition: avfilter.h:144
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:148
read_shape_from_file
static int read_shape_from_file(int *cols, int *rows, int **values, const char *filename, void *log_ctx)
Definition: vf_libopencv.c:144
AVFilterContext::outputs
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
erode_end_frame_filter
static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:322
ocv_options
static const AVOption ocv_options[]
Definition: vf_libopencv.c:405
av_isgraph
static av_const int av_isgraph(int c)
Locale-independent conversion of ASCII isgraph.
Definition: avstring.h:214
int
int
Definition: ffmpeg_filter.c:190
AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:70
common.h
common internal and external API header
OCVFilterEntry::init
int(* init)(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:332
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_libopencv.c:67
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
pixfmt
enum AVPixelFormat pixfmt
Definition: kmsgrab.c:202
smooth_init
static av_cold int smooth_init(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:94
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
AVFrame::height
int height
Definition: frame.h:276
out
FILE * out
Definition: movenc.c:54
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
fill_frame_from_iplimage
static void fill_frame_from_iplimage(AVFrame *frame, const IplImage *img, enum AVPixelFormat pixfmt)
Definition: vf_libopencv.c:61
internal.h
internal API functions
DilateContext::nb_iterations
int nb_iterations
Definition: vf_libopencv.c:268
ocv_filter_entries
static const OCVFilterEntry ocv_filter_entries[]
Definition: vf_libopencv.c:337
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
OCVFilterEntry::priv_size
size_t priv_size
Definition: vf_libopencv.c:331
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:652
av_mallocz_array
void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.c:191
name
const char * name
Definition: opengl_enc.c:103
Generated on Sun May 13 2018 02:04:02 for FFmpeg by   doxygen 1.8.6

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