FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
vf_libopencv.c
Go to the documentation of this file.
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 
68 {
69  static const enum AVPixelFormat pix_fmts[] = {
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);
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;
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  return AVERROR_INVALIDDATA;
161  }
162  ++(*rows);
163  *cols = FFMAX(*cols, w);
164  w = 0;
165  } else if (w == INT_MAX) {
166  av_log(log_ctx, AV_LOG_ERROR, "Overflow on the number of columns in the file\n");
167  return AVERROR_INVALIDDATA;
168  }
169  w++;
170  }
171  if (*rows > (SIZE_MAX / sizeof(int) / *cols)) {
172  av_log(log_ctx, AV_LOG_ERROR, "File with size %dx%d is too big\n",
173  *rows, *cols);
174  return AVERROR_INVALIDDATA;
175  }
176  if (!(*values = av_mallocz_array(sizeof(int) * *rows, *cols)))
177  return AVERROR(ENOMEM);
178 
179  /* fill *values */
180  p = buf;
181  pend = buf + size-1;
182  for (i = 0; i < *rows; i++) {
183  for (j = 0;; j++) {
184  if (p > pend || *p == '\n') {
185  p++;
186  break;
187  } else
188  (*values)[*cols*i + j] = !!av_isgraph(*(p++));
189  }
190  }
191  av_file_unmap(buf, size);
192 
193 #ifdef DEBUG
194  {
195  char *line;
196  if (!(line = av_malloc(*cols + 1)))
197  return AVERROR(ENOMEM);
198  for (i = 0; i < *rows; i++) {
199  for (j = 0; j < *cols; j++)
200  line[j] = (*values)[i * *cols + j] ? '@' : ' ';
201  line[j] = 0;
202  av_log(log_ctx, AV_LOG_DEBUG, "%3d: %s\n", i, line);
203  }
204  av_free(line);
205  }
206 #endif
207 
208  return 0;
209 }
210 
211 static int parse_iplconvkernel(IplConvKernel **kernel, char *buf, void *log_ctx)
212 {
213  char shape_filename[128] = "", shape_str[32] = "rect";
214  int cols = 0, rows = 0, anchor_x = 0, anchor_y = 0, shape = CV_SHAPE_RECT;
215  int *values = NULL, ret = 0;
216 
217  sscanf(buf, "%dx%d+%dx%d/%32[^=]=%127s", &cols, &rows, &anchor_x, &anchor_y, shape_str, shape_filename);
218 
219  if (!strcmp(shape_str, "rect" )) shape = CV_SHAPE_RECT;
220  else if (!strcmp(shape_str, "cross" )) shape = CV_SHAPE_CROSS;
221  else if (!strcmp(shape_str, "ellipse")) shape = CV_SHAPE_ELLIPSE;
222  else if (!strcmp(shape_str, "custom" )) {
223  shape = CV_SHAPE_CUSTOM;
224  if ((ret = read_shape_from_file(&cols, &rows, &values, shape_filename, log_ctx)) < 0)
225  return ret;
226  } else {
227  av_log(log_ctx, AV_LOG_ERROR,
228  "Shape unspecified or type '%s' unknown.\n", shape_str);
229  ret = AVERROR(EINVAL);
230  goto out;
231  }
232 
233  if (rows <= 0 || cols <= 0) {
234  av_log(log_ctx, AV_LOG_ERROR,
235  "Invalid non-positive values for shape size %dx%d\n", cols, rows);
236  ret = AVERROR(EINVAL);
237  goto out;
238  }
239 
240  if (anchor_x < 0 || anchor_y < 0 || anchor_x >= cols || anchor_y >= rows) {
241  av_log(log_ctx, AV_LOG_ERROR,
242  "Shape anchor %dx%d is not inside the rectangle with size %dx%d.\n",
243  anchor_x, anchor_y, cols, rows);
244  ret = AVERROR(EINVAL);
245  goto out;
246  }
247 
248  *kernel = cvCreateStructuringElementEx(cols, rows, anchor_x, anchor_y, shape, values);
249  if (!*kernel) {
250  ret = AVERROR(ENOMEM);
251  goto out;
252  }
253 
254  av_log(log_ctx, AV_LOG_VERBOSE, "Structuring element: w:%d h:%d x:%d y:%d shape:%s\n",
255  rows, cols, anchor_x, anchor_y, shape_str);
256 out:
257  av_freep(&values);
258  return ret;
259 }
260 
261 typedef struct DilateContext {
263  IplConvKernel *kernel;
264 } DilateContext;
265 
266 static av_cold int dilate_init(AVFilterContext *ctx, const char *args)
267 {
268  OCVContext *s = ctx->priv;
269  DilateContext *dilate = s->priv;
270  char default_kernel_str[] = "3x3+0x0/rect";
271  char *kernel_str = NULL;
272  const char *buf = args;
273  int ret;
274 
275  if (args) {
276  kernel_str = av_get_token(&buf, "|");
277 
278  if (!kernel_str)
279  return AVERROR(ENOMEM);
280  }
281 
282  ret = parse_iplconvkernel(&dilate->kernel,
283  (!kernel_str || !*kernel_str) ? default_kernel_str
284  : kernel_str,
285  ctx);
286  av_free(kernel_str);
287  if (ret < 0)
288  return ret;
289 
290  if (!buf || sscanf(buf, "|%d", &dilate->nb_iterations) != 1)
291  dilate->nb_iterations = 1;
292  av_log(ctx, AV_LOG_VERBOSE, "iterations_nb:%d\n", dilate->nb_iterations);
293  if (dilate->nb_iterations <= 0) {
294  av_log(ctx, AV_LOG_ERROR, "Invalid non-positive value '%d' for nb_iterations\n",
295  dilate->nb_iterations);
296  return AVERROR(EINVAL);
297  }
298  return 0;
299 }
300 
302 {
303  OCVContext *s = ctx->priv;
304  DilateContext *dilate = s->priv;
305 
306  cvReleaseStructuringElement(&dilate->kernel);
307 }
308 
309 static void dilate_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
310 {
311  OCVContext *s = ctx->priv;
312  DilateContext *dilate = s->priv;
313  cvDilate(inimg, outimg, dilate->kernel, dilate->nb_iterations);
314 }
315 
316 static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
317 {
318  OCVContext *s = ctx->priv;
319  DilateContext *dilate = s->priv;
320  cvErode(inimg, outimg, dilate->kernel, dilate->nb_iterations);
321 }
322 
323 typedef struct OCVFilterEntry {
324  const char *name;
325  size_t priv_size;
326  int (*init)(AVFilterContext *ctx, const char *args);
328  void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg);
330 
334  { "smooth", sizeof(SmoothContext), smooth_init, NULL, smooth_end_frame_filter },
335 };
336 
338 {
339  OCVContext *s = ctx->priv;
340  int i;
341 
342  if (!s->name) {
343  av_log(ctx, AV_LOG_ERROR, "No libopencv filter name specified\n");
344  return AVERROR(EINVAL);
345  }
346  for (i = 0; i < FF_ARRAY_ELEMS(ocv_filter_entries); i++) {
347  const OCVFilterEntry *entry = &ocv_filter_entries[i];
348  if (!strcmp(s->name, entry->name)) {
349  s->init = entry->init;
350  s->uninit = entry->uninit;
352 
353  if (!(s->priv = av_mallocz(entry->priv_size)))
354  return AVERROR(ENOMEM);
355  return s->init(ctx, s->params);
356  }
357  }
358 
359  av_log(ctx, AV_LOG_ERROR, "No libopencv filter named '%s'\n", s->name);
360  return AVERROR(EINVAL);
361 }
362 
364 {
365  OCVContext *s = ctx->priv;
366 
367  if (s->uninit)
368  s->uninit(ctx);
369  av_freep(&s->priv);
370 }
371 
372 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
373 {
374  AVFilterContext *ctx = inlink->dst;
375  OCVContext *s = ctx->priv;
376  AVFilterLink *outlink= inlink->dst->outputs[0];
377  AVFrame *out;
378  IplImage inimg, outimg;
379 
380  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
381  if (!out) {
382  av_frame_free(&in);
383  return AVERROR(ENOMEM);
384  }
385  av_frame_copy_props(out, in);
386 
387  fill_iplimage_from_frame(&inimg , in , inlink->format);
388  fill_iplimage_from_frame(&outimg, out, inlink->format);
389  s->end_frame_filter(ctx, &inimg, &outimg);
390  fill_frame_from_iplimage(out, &outimg, inlink->format);
391 
392  av_frame_free(&in);
393 
394  return ff_filter_frame(outlink, out);
395 }
396 
397 #define OFFSET(x) offsetof(OCVContext, x)
398 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
399 static const AVOption ocv_options[] = {
400  { "filter_name", NULL, OFFSET(name), AV_OPT_TYPE_STRING, .flags = FLAGS },
401  { "filter_params", NULL, OFFSET(params), AV_OPT_TYPE_STRING, .flags = FLAGS },
402  { NULL }
403 };
404 
406 
408  {
409  .name = "default",
410  .type = AVMEDIA_TYPE_VIDEO,
411  .filter_frame = filter_frame,
412  },
413  { NULL }
414 };
415 
417  {
418  .name = "default",
419  .type = AVMEDIA_TYPE_VIDEO,
420  },
421  { NULL }
422 };
423 
425  .name = "ocv",
426  .description = NULL_IF_CONFIG_SMALL("Apply transform using libopencv."),
427  .priv_size = sizeof(OCVContext),
428  .priv_class = &ocv_class,
430  .init = init,
431  .uninit = uninit,
432  .inputs = avfilter_vf_ocv_inputs,
433  .outputs = avfilter_vf_ocv_outputs,
434 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static int parse_iplconvkernel(IplConvKernel **kernel, char *buf, void *log_ctx)
Definition: vf_libopencv.c:211
char * name
Definition: vf_libopencv.c:80
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
AVOption.
Definition: opt.h:245
Main libavfilter public API header.
AVFILTER_DEFINE_CLASS(ocv)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
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
void(* uninit)(AVFilterContext *ctx)
Definition: vf_libopencv.c:327
#define FLAGS
Definition: vf_libopencv.c:398
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_libopencv.c:372
#define img
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:1189
static void smooth_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:137
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
AVOptions.
static av_cold void dilate_uninit(AVFilterContext *ctx)
Definition: vf_libopencv.c:301
void(* end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:84
static AVFrame * frame
Misc file utilities.
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
ptrdiff_t size
Definition: opengl_enc.c:101
#define av_log(a,...)
int(* init)(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:82
#define OFFSET(x)
Definition: vf_libopencv.c:397
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:236
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
void av_file_unmap(uint8_t *bufptr, size_t size)
Unmap or free the buffer bufptr created by av_file_map().
Definition: file.c:129
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
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:49
#define AVERROR(e)
Definition: error.h:43
static av_cold int init(AVFilterContext *ctx)
Definition: vf_libopencv.c:337
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:154
const char * name
Definition: vf_libopencv.c:324
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:96
void * priv
private data for use by the filter
Definition: avfilter.h:322
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
GLenum GLint * params
Definition: opengl_enc.c:114
Definition: graph2dot.c:48
#define FFMAX(a, b)
Definition: common.h:94
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:226
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
int depth
Definition: v4l.c:62
static void dilate_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:309
char * params
Definition: vf_libopencv.c:81
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
static const AVFilterPad avfilter_vf_ocv_outputs[]
Definition: vf_libopencv.c:416
static void fill_iplimage_from_frame(IplImage *img, const AVFrame *frame, enum AVPixelFormat pixfmt)
Definition: vf_libopencv.c:43
AVS_Value args
Definition: avisynth_c.h:699
void(* end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:328
AVFormatContext * ctx
Definition: movenc.c:48
void(* uninit)(AVFilterContext *ctx)
Definition: vf_libopencv.c:83
IplConvKernel * kernel
Definition: vf_libopencv.c:263
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
#define FF_ARRAY_ELEMS(a)
void * priv
Definition: vf_libopencv.c:85
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
static const AVFilterPad avfilter_vf_ocv_inputs[]
Definition: vf_libopencv.c:407
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:215
static av_cold int dilate_init(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:266
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
AVFilter ff_vf_ocv
Definition: vf_libopencv.c:424
void * buf
Definition: avisynth_c.h:690
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_libopencv.c:363
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
const char * name
Filter name.
Definition: avfilter.h:148
static int read_shape_from_file(int *cols, int *rows, int **values, const char *filename, void *log_ctx)
Definition: vf_libopencv.c:144
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:319
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:316
static const AVOption ocv_options[]
Definition: vf_libopencv.c:399
static av_const int av_isgraph(int c)
Locale-independent conversion of ASCII isgraph.
Definition: avstring.h:214
Y , 8bpp.
Definition: pixfmt.h:70
common internal and external API header
int(* init)(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:326
static int query_formats(AVFilterContext *ctx)
Definition: vf_libopencv.c:67
#define av_free(p)
A list of supported formats for one end of a filter link.
Definition: formats.h:64
static av_cold int smooth_init(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:94
An instance of a filter.
Definition: avfilter.h:307
int height
Definition: frame.h:236
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static void fill_frame_from_iplimage(AVFrame *frame, const IplImage *img, enum AVPixelFormat pixfmt)
Definition: vf_libopencv.c:61
internal API functions
static const OCVFilterEntry ocv_filter_entries[]
Definition: vf_libopencv.c:331
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:581
const char * name
Definition: opengl_enc.c:103