Libav
vf_libopencv.c
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1 /*
2  * Copyright (c) 2010 Stefano Sabatini
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
26 #include <opencv/cv.h>
27 #include <opencv/cxcore.h>
28 #include "libavutil/avstring.h"
29 #include "libavutil/common.h"
30 #include "libavutil/file.h"
31 #include "libavutil/opt.h"
32 #include "avfilter.h"
33 #include "formats.h"
34 #include "internal.h"
35 #include "video.h"
36 
37 static void fill_iplimage_from_frame(IplImage *img, const AVFrame *frame, enum AVPixelFormat pixfmt)
38 {
39  IplImage *tmpimg;
40  int depth, channels_nb;
41 
42  if (pixfmt == AV_PIX_FMT_GRAY8) { depth = IPL_DEPTH_8U; channels_nb = 1; }
43  else if (pixfmt == AV_PIX_FMT_BGRA) { depth = IPL_DEPTH_8U; channels_nb = 4; }
44  else if (pixfmt == AV_PIX_FMT_BGR24) { depth = IPL_DEPTH_8U; channels_nb = 3; }
45  else return;
46 
47  tmpimg = cvCreateImageHeader((CvSize){frame->width, frame->height}, depth, channels_nb);
48  *img = *tmpimg;
49  img->imageData = img->imageDataOrigin = frame->data[0];
50  img->dataOrder = IPL_DATA_ORDER_PIXEL;
51  img->origin = IPL_ORIGIN_TL;
52  img->widthStep = frame->linesize[0];
53 }
54 
55 static void fill_frame_from_iplimage(AVFrame *frame, const IplImage *img, enum AVPixelFormat pixfmt)
56 {
57  frame->linesize[0] = img->widthStep;
58  frame->data[0] = img->imageData;
59 }
60 
62 {
63  static const enum AVPixelFormat pix_fmts[] = {
65  };
66 
68  return 0;
69 }
70 
71 typedef struct OCVContext {
72  const AVClass *class;
73  char *name;
74  char *params;
75  int (*init)(AVFilterContext *ctx, const char *args);
77  void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg);
78  void *priv;
79 } OCVContext;
80 
81 typedef struct SmoothContext {
82  int type;
83  int param1, param2;
84  double param3, param4;
86 
87 static av_cold int smooth_init(AVFilterContext *ctx, const char *args)
88 {
89  OCVContext *s = ctx->priv;
90  SmoothContext *smooth = s->priv;
91  char type_str[128] = "gaussian";
92 
93  smooth->param1 = 3;
94  smooth->param2 = 0;
95  smooth->param3 = 0.0;
96  smooth->param4 = 0.0;
97 
98  if (args)
99  sscanf(args, "%127[^|]|%d|%d|%lf|%lf", type_str, &smooth->param1, &smooth->param2, &smooth->param3, &smooth->param4);
100 
101  if (!strcmp(type_str, "blur" )) smooth->type = CV_BLUR;
102  else if (!strcmp(type_str, "blur_no_scale")) smooth->type = CV_BLUR_NO_SCALE;
103  else if (!strcmp(type_str, "median" )) smooth->type = CV_MEDIAN;
104  else if (!strcmp(type_str, "gaussian" )) smooth->type = CV_GAUSSIAN;
105  else if (!strcmp(type_str, "bilateral" )) smooth->type = CV_BILATERAL;
106  else {
107  av_log(ctx, AV_LOG_ERROR, "Smoothing type '%s' unknown.\n", type_str);
108  return AVERROR(EINVAL);
109  }
110 
111  if (smooth->param1 < 0 || !(smooth->param1%2)) {
112  av_log(ctx, AV_LOG_ERROR,
113  "Invalid value '%d' for param1, it has to be a positive odd number\n",
114  smooth->param1);
115  return AVERROR(EINVAL);
116  }
117  if ((smooth->type == CV_BLUR || smooth->type == CV_BLUR_NO_SCALE || smooth->type == CV_GAUSSIAN) &&
118  (smooth->param2 < 0 || (smooth->param2 && !(smooth->param2%2)))) {
119  av_log(ctx, AV_LOG_ERROR,
120  "Invalid value '%d' for param2, it has to be zero or a positive odd number\n",
121  smooth->param2);
122  return AVERROR(EINVAL);
123  }
124 
125  av_log(ctx, AV_LOG_VERBOSE, "type:%s param1:%d param2:%d param3:%f param4:%f\n",
126  type_str, smooth->param1, smooth->param2, smooth->param3, smooth->param4);
127  return 0;
128 }
129 
130 static void smooth_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
131 {
132  OCVContext *s = ctx->priv;
133  SmoothContext *smooth = s->priv;
134  cvSmooth(inimg, outimg, smooth->type, smooth->param1, smooth->param2, smooth->param3, smooth->param4);
135 }
136 
137 static int read_shape_from_file(int *cols, int *rows, int **values, const char *filename,
138  void *log_ctx)
139 {
140  uint8_t *buf, *p, *pend;
141  size_t size;
142  int ret, i, j, w;
143 
144  if ((ret = av_file_map(filename, &buf, &size, 0, log_ctx)) < 0)
145  return ret;
146 
147  /* prescan file to get the number of lines and the maximum width */
148  w = 0;
149  for (i = 0; i < size; i++) {
150  if (buf[i] == '\n') {
151  if (*rows == INT_MAX) {
152  av_log(log_ctx, AV_LOG_ERROR, "Overflow on the number of rows in the file\n");
153  return AVERROR_INVALIDDATA;
154  }
155  ++(*rows);
156  *cols = FFMAX(*cols, w);
157  w = 0;
158  } else if (w == INT_MAX) {
159  av_log(log_ctx, AV_LOG_ERROR, "Overflow on the number of columns in the file\n");
160  return AVERROR_INVALIDDATA;
161  }
162  w++;
163  }
164  if (*rows > (SIZE_MAX / sizeof(int) / *cols)) {
165  av_log(log_ctx, AV_LOG_ERROR, "File with size %dx%d is too big\n",
166  *rows, *cols);
167  return AVERROR_INVALIDDATA;
168  }
169  if (!(*values = av_mallocz(sizeof(int) * *rows * *cols)))
170  return AVERROR(ENOMEM);
171 
172  /* fill *values */
173  p = buf;
174  pend = buf + size-1;
175  for (i = 0; i < *rows; i++) {
176  for (j = 0;; j++) {
177  if (p > pend || *p == '\n') {
178  p++;
179  break;
180  } else
181  (*values)[*cols*i + j] = !!av_isgraph(*(p++));
182  }
183  }
184  av_file_unmap(buf, size);
185 
186 #ifdef DEBUG
187  {
188  char *line;
189  if (!(line = av_malloc(*cols + 1)))
190  return AVERROR(ENOMEM);
191  for (i = 0; i < *rows; i++) {
192  for (j = 0; j < *cols; j++)
193  line[j] = (*values)[i * *cols + j] ? '@' : ' ';
194  line[j] = 0;
195  av_log(log_ctx, AV_LOG_DEBUG, "%3d: %s\n", i, line);
196  }
197  av_free(line);
198  }
199 #endif
200 
201  return 0;
202 }
203 
204 static int parse_iplconvkernel(IplConvKernel **kernel, char *buf, void *log_ctx)
205 {
206  char shape_filename[128] = "", shape_str[32] = "rect";
207  int cols = 0, rows = 0, anchor_x = 0, anchor_y = 0, shape = CV_SHAPE_RECT;
208  int *values = NULL, ret = 0;
209 
210  sscanf(buf, "%dx%d+%dx%d/%32[^=]=%127s", &cols, &rows, &anchor_x, &anchor_y, shape_str, shape_filename);
211 
212  if (!strcmp(shape_str, "rect" )) shape = CV_SHAPE_RECT;
213  else if (!strcmp(shape_str, "cross" )) shape = CV_SHAPE_CROSS;
214  else if (!strcmp(shape_str, "ellipse")) shape = CV_SHAPE_ELLIPSE;
215  else if (!strcmp(shape_str, "custom" )) {
216  shape = CV_SHAPE_CUSTOM;
217  if ((ret = read_shape_from_file(&cols, &rows, &values, shape_filename, log_ctx)) < 0)
218  return ret;
219  } else {
220  av_log(log_ctx, AV_LOG_ERROR,
221  "Shape unspecified or type '%s' unknown.\n", shape_str);
222  ret = AVERROR(EINVAL);
223  goto out;
224  }
225 
226  if (rows <= 0 || cols <= 0) {
227  av_log(log_ctx, AV_LOG_ERROR,
228  "Invalid non-positive values for shape size %dx%d\n", cols, rows);
229  ret = AVERROR(EINVAL);
230  goto out;
231  }
232 
233  if (anchor_x < 0 || anchor_y < 0 || anchor_x >= cols || anchor_y >= rows) {
234  av_log(log_ctx, AV_LOG_ERROR,
235  "Shape anchor %dx%d is not inside the rectangle with size %dx%d.\n",
236  anchor_x, anchor_y, cols, rows);
237  ret = AVERROR(EINVAL);
238  goto out;
239  }
240 
241  *kernel = cvCreateStructuringElementEx(cols, rows, anchor_x, anchor_y, shape, values);
242  if (!*kernel) {
243  ret = AVERROR(ENOMEM);
244  goto out;
245  }
246 
247  av_log(log_ctx, AV_LOG_VERBOSE, "Structuring element: w:%d h:%d x:%d y:%d shape:%s\n",
248  rows, cols, anchor_x, anchor_y, shape_str);
249 out:
250  av_freep(&values);
251  return ret;
252 }
253 
254 typedef struct DilateContext {
256  IplConvKernel *kernel;
257 } DilateContext;
258 
259 static av_cold int dilate_init(AVFilterContext *ctx, const char *args)
260 {
261  OCVContext *s = ctx->priv;
262  DilateContext *dilate = s->priv;
263  char default_kernel_str[] = "3x3+0x0/rect";
264  char *kernel_str = NULL;
265  const char *buf = args;
266  int ret;
267 
268  dilate->nb_iterations = 1;
269 
270  if (args) {
271  kernel_str = av_get_token(&buf, "|");
272  if (!kernel_str)
273  return AVERROR(ENOMEM);
274  }
275 
276  ret = parse_iplconvkernel(&dilate->kernel,
277  (!kernel_str || !*kernel_str) ? default_kernel_str
278  : kernel_str,
279  ctx);
280  av_free(kernel_str);
281  if (ret < 0)
282  return ret;
283 
284  sscanf(buf, "|%d", &dilate->nb_iterations);
285  av_log(ctx, AV_LOG_VERBOSE, "iterations_nb:%d\n", dilate->nb_iterations);
286  if (dilate->nb_iterations <= 0) {
287  av_log(ctx, AV_LOG_ERROR, "Invalid non-positive value '%d' for nb_iterations\n",
288  dilate->nb_iterations);
289  return AVERROR(EINVAL);
290  }
291  return 0;
292 }
293 
295 {
296  OCVContext *s = ctx->priv;
297  DilateContext *dilate = s->priv;
298 
299  cvReleaseStructuringElement(&dilate->kernel);
300 }
301 
302 static void dilate_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
303 {
304  OCVContext *s = ctx->priv;
305  DilateContext *dilate = s->priv;
306  cvDilate(inimg, outimg, dilate->kernel, dilate->nb_iterations);
307 }
308 
309 static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
310 {
311  OCVContext *s = ctx->priv;
312  DilateContext *dilate = s->priv;
313  cvErode(inimg, outimg, dilate->kernel, dilate->nb_iterations);
314 }
315 
316 typedef struct OCVFilterEntry {
317  const char *name;
318  size_t priv_size;
319  int (*init)(AVFilterContext *ctx, const char *args);
321  void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg);
323 
327  { "smooth", sizeof(SmoothContext), smooth_init, NULL, smooth_end_frame_filter },
328 };
329 
331 {
332  OCVContext *s = ctx->priv;
333  int i;
334 
335  for (i = 0; i < FF_ARRAY_ELEMS(ocv_filter_entries); i++) {
336  OCVFilterEntry *entry = &ocv_filter_entries[i];
337  if (!strcmp(s->name, entry->name)) {
338  s->init = entry->init;
339  s->uninit = entry->uninit;
341 
342  if (!(s->priv = av_mallocz(entry->priv_size)))
343  return AVERROR(ENOMEM);
344  return s->init(ctx, s->params);
345  }
346  }
347 
348  av_log(ctx, AV_LOG_ERROR, "No libopencv filter named '%s'\n", s->name);
349  return AVERROR(EINVAL);
350 }
351 
353 {
354  OCVContext *s = ctx->priv;
355 
356  if (s->uninit)
357  s->uninit(ctx);
358  av_free(s->priv);
359 }
360 
361 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
362 {
363  AVFilterContext *ctx = inlink->dst;
364  OCVContext *s = ctx->priv;
365  AVFilterLink *outlink= inlink->dst->outputs[0];
366  AVFrame *out;
367  IplImage inimg, outimg;
368 
369  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
370  if (!out) {
371  av_frame_free(&in);
372  return AVERROR(ENOMEM);
373  }
374  av_frame_copy_props(out, in);
375 
376  fill_iplimage_from_frame(&inimg , in , inlink->format);
377  fill_iplimage_from_frame(&outimg, out, inlink->format);
378  s->end_frame_filter(ctx, &inimg, &outimg);
379  fill_frame_from_iplimage(out, &outimg, inlink->format);
380 
381  av_frame_free(&in);
382 
383  return ff_filter_frame(outlink, out);
384 }
385 
386 #define OFFSET(x) offsetof(OCVContext, x)
387 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM
388 static const AVOption options[] = {
389  { "filter_name", NULL, OFFSET(name), AV_OPT_TYPE_STRING, .flags = FLAGS },
390  { "filter_params", NULL, OFFSET(params), AV_OPT_TYPE_STRING, .flags = FLAGS },
391  { NULL },
392 };
393 
394 static const AVClass ocv_class = {
395  .class_name = "ocv",
396  .item_name = av_default_item_name,
397  .option = options,
398  .version = LIBAVUTIL_VERSION_INT,
399 };
400 
402  {
403  .name = "default",
404  .type = AVMEDIA_TYPE_VIDEO,
405  .filter_frame = filter_frame,
406  },
407  { NULL }
408 };
409 
411  {
412  .name = "default",
413  .type = AVMEDIA_TYPE_VIDEO,
414  },
415  { NULL }
416 };
417 
419  .name = "ocv",
420  .description = NULL_IF_CONFIG_SMALL("Apply transform using libopencv."),
421 
422  .priv_size = sizeof(OCVContext),
423  .priv_class = &ocv_class,
424 
426  .init = init,
427  .uninit = uninit,
428 
429  .inputs = avfilter_vf_ocv_inputs,
430 
431  .outputs = avfilter_vf_ocv_outputs,
432 };
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
int(* init)(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:319
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
static int parse_iplconvkernel(IplConvKernel **kernel, char *buf, void *log_ctx)
Definition: vf_libopencv.c:204
char * name
Definition: vf_libopencv.c:73
int size
void(* end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:77
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
AVOption.
Definition: opt.h:234
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:259
Main libavfilter public API header.
static OCVFilterEntry ocv_filter_entries[]
Definition: vf_libopencv.c:324
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
#define FF_ARRAY_ELEMS(a)
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:57
#define FLAGS
Definition: vf_libopencv.c:387
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:202
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:165
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_libopencv.c:361
const char * name
Pad name.
Definition: internal.h:41
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:39
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:747
static void smooth_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:130
uint8_t
#define av_cold
Definition: attributes.h:66
AVOptions.
static av_cold void dilate_uninit(AVFilterContext *ctx)
Definition: vf_libopencv.c:294
Misc file utilities.
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:140
void 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:389
#define OFFSET(x)
Definition: vf_libopencv.c:386
A filter pad used for either input or output.
Definition: internal.h:35
int width
width and height of the video frame
Definition: frame.h:179
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
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
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:190
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
void(* uninit)(AVFilterContext *ctx)
Definition: vf_libopencv.c:320
#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:80
const char * name
Definition: vf_libopencv.c:317
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:92
void * priv
private data for use by the filter
Definition: avfilter.h:277
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:145
Definition: graph2dot.c:48
int(* init)(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:75
#define FFMAX(a, b)
Definition: common.h:64
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:121
static void dilate_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:302
char * params
Definition: vf_libopencv.c:74
static const AVFilterPad avfilter_vf_ocv_outputs[]
Definition: vf_libopencv.c:410
static void fill_iplimage_from_frame(IplImage *img, const AVFrame *frame, enum AVPixelFormat pixfmt)
Definition: vf_libopencv.c:37
AVFormatContext * ctx
Definition: movenc.c:48
IplConvKernel * kernel
Definition: vf_libopencv.c:256
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:62
LIBAVUTIL_VERSION_INT
Definition: eval.c:55
void * priv
Definition: vf_libopencv.c:78
static const AVClass ocv_class
Definition: vf_libopencv.c:394
NULL
Definition: eval.c:55
static const AVFilterPad avfilter_vf_ocv_inputs[]
Definition: vf_libopencv.c:401
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:158
av_default_item_name
Definition: dnxhdenc.c:55
static av_cold int dilate_init(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:259
static void(WINAPI *cond_broadcast)(pthread_cond_t *cond)
AVFilter ff_vf_ocv
Definition: vf_libopencv.c:418
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;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);return NULL;} return ac;} 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;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->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);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:34
Filter definition.
Definition: avfilter.h:120
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:248
const char * name
Filter name.
Definition: avfilter.h:124
static int read_shape_from_file(int *cols, int *rows, int **values, const char *filename, void *log_ctx)
Definition: vf_libopencv.c:137
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:274
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:257
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:146
static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:309
static av_const int av_isgraph(int c)
Locale-independent conversion of ASCII isgraph.
Definition: avstring.h:165
Y , 8bpp.
Definition: pixfmt.h:67
common internal and external API header
void(* end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
Definition: vf_libopencv.c:321
static int query_formats(AVFilterContext *ctx)
Definition: vf_libopencv.c:61
static av_cold int smooth_init(AVFilterContext *ctx, const char *args)
Definition: vf_libopencv.c:87
An instance of a filter.
Definition: avfilter.h:262
int height
Definition: frame.h:179
FILE * out
Definition: movenc.c:54
static void fill_frame_from_iplimage(AVFrame *frame, const IplImage *img, enum AVPixelFormat pixfmt)
Definition: vf_libopencv.c:55
static const AVOption options[]
Definition: vf_libopencv.c:388
internal API functions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:57
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:211
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:386
void(* uninit)(AVFilterContext *ctx)
Definition: vf_libopencv.c:76