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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 <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 | ||
61 | static int query_formats(AVFilterContext *ctx) | |
62 | { | |
63 | static const enum AVPixelFormat pix_fmts[] = { | |
64 | AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE | |
65 | }; | |
66 | ||
67 | ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); | |
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); | |
76 | void (*uninit)(AVFilterContext *ctx); | |
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; | |
85 | } SmoothContext; | |
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_array(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; | |
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 | return AVERROR(EINVAL); | |
223 | } | |
224 | ||
225 | if (rows <= 0 || cols <= 0) { | |
226 | av_log(log_ctx, AV_LOG_ERROR, | |
227 | "Invalid non-positive values for shape size %dx%d\n", cols, rows); | |
228 | return AVERROR(EINVAL); | |
229 | } | |
230 | ||
231 | if (anchor_x < 0 || anchor_y < 0 || anchor_x >= cols || anchor_y >= rows) { | |
232 | av_log(log_ctx, AV_LOG_ERROR, | |
233 | "Shape anchor %dx%d is not inside the rectangle with size %dx%d.\n", | |
234 | anchor_x, anchor_y, cols, rows); | |
235 | return AVERROR(EINVAL); | |
236 | } | |
237 | ||
238 | *kernel = cvCreateStructuringElementEx(cols, rows, anchor_x, anchor_y, shape, values); | |
239 | av_freep(&values); | |
240 | if (!*kernel) | |
241 | return AVERROR(ENOMEM); | |
242 | ||
243 | av_log(log_ctx, AV_LOG_VERBOSE, "Structuring element: w:%d h:%d x:%d y:%d shape:%s\n", | |
244 | rows, cols, anchor_x, anchor_y, shape_str); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | typedef struct DilateContext { | |
249 | int nb_iterations; | |
250 | IplConvKernel *kernel; | |
251 | } DilateContext; | |
252 | ||
253 | static av_cold int dilate_init(AVFilterContext *ctx, const char *args) | |
254 | { | |
255 | OCVContext *s = ctx->priv; | |
256 | DilateContext *dilate = s->priv; | |
257 | char default_kernel_str[] = "3x3+0x0/rect"; | |
258 | char *kernel_str; | |
259 | const char *buf = args; | |
260 | int ret; | |
261 | ||
262 | if (args) | |
263 | kernel_str = av_get_token(&buf, "|"); | |
264 | else | |
265 | kernel_str = av_strdup(default_kernel_str); | |
266 | if (!kernel_str) | |
267 | return AVERROR(ENOMEM); | |
268 | if ((ret = parse_iplconvkernel(&dilate->kernel, kernel_str, ctx)) < 0) | |
269 | return ret; | |
270 | av_free(kernel_str); | |
271 | ||
272 | if (!buf || sscanf(buf, "|%d", &dilate->nb_iterations) != 1) | |
273 | dilate->nb_iterations = 1; | |
274 | av_log(ctx, AV_LOG_VERBOSE, "iterations_nb:%d\n", dilate->nb_iterations); | |
275 | if (dilate->nb_iterations <= 0) { | |
276 | av_log(ctx, AV_LOG_ERROR, "Invalid non-positive value '%d' for nb_iterations\n", | |
277 | dilate->nb_iterations); | |
278 | return AVERROR(EINVAL); | |
279 | } | |
280 | return 0; | |
281 | } | |
282 | ||
283 | static av_cold void dilate_uninit(AVFilterContext *ctx) | |
284 | { | |
285 | OCVContext *s = ctx->priv; | |
286 | DilateContext *dilate = s->priv; | |
287 | ||
288 | cvReleaseStructuringElement(&dilate->kernel); | |
289 | } | |
290 | ||
291 | static void dilate_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg) | |
292 | { | |
293 | OCVContext *s = ctx->priv; | |
294 | DilateContext *dilate = s->priv; | |
295 | cvDilate(inimg, outimg, dilate->kernel, dilate->nb_iterations); | |
296 | } | |
297 | ||
298 | static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg) | |
299 | { | |
300 | OCVContext *s = ctx->priv; | |
301 | DilateContext *dilate = s->priv; | |
302 | cvErode(inimg, outimg, dilate->kernel, dilate->nb_iterations); | |
303 | } | |
304 | ||
305 | typedef struct OCVFilterEntry { | |
306 | const char *name; | |
307 | size_t priv_size; | |
308 | int (*init)(AVFilterContext *ctx, const char *args); | |
309 | void (*uninit)(AVFilterContext *ctx); | |
310 | void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg); | |
311 | } OCVFilterEntry; | |
312 | ||
313 | static OCVFilterEntry ocv_filter_entries[] = { | |
314 | { "dilate", sizeof(DilateContext), dilate_init, dilate_uninit, dilate_end_frame_filter }, | |
315 | { "erode", sizeof(DilateContext), dilate_init, dilate_uninit, erode_end_frame_filter }, | |
316 | { "smooth", sizeof(SmoothContext), smooth_init, NULL, smooth_end_frame_filter }, | |
317 | }; | |
318 | ||
319 | static av_cold int init(AVFilterContext *ctx) | |
320 | { | |
321 | OCVContext *s = ctx->priv; | |
322 | int i; | |
323 | ||
324 | if (!s->name) { | |
325 | av_log(ctx, AV_LOG_ERROR, "No libopencv filter name specified\n"); | |
326 | return AVERROR(EINVAL); | |
327 | } | |
328 | for (i = 0; i < FF_ARRAY_ELEMS(ocv_filter_entries); i++) { | |
329 | OCVFilterEntry *entry = &ocv_filter_entries[i]; | |
330 | if (!strcmp(s->name, entry->name)) { | |
331 | s->init = entry->init; | |
332 | s->uninit = entry->uninit; | |
333 | s->end_frame_filter = entry->end_frame_filter; | |
334 | ||
335 | if (!(s->priv = av_mallocz(entry->priv_size))) | |
336 | return AVERROR(ENOMEM); | |
337 | return s->init(ctx, s->params); | |
338 | } | |
339 | } | |
340 | ||
341 | av_log(ctx, AV_LOG_ERROR, "No libopencv filter named '%s'\n", s->name); | |
342 | return AVERROR(EINVAL); | |
343 | } | |
344 | ||
345 | static av_cold void uninit(AVFilterContext *ctx) | |
346 | { | |
347 | OCVContext *s = ctx->priv; | |
348 | ||
349 | if (s->uninit) | |
350 | s->uninit(ctx); | |
351 | av_free(s->priv); | |
352 | } | |
353 | ||
354 | static int filter_frame(AVFilterLink *inlink, AVFrame *in) | |
355 | { | |
356 | AVFilterContext *ctx = inlink->dst; | |
357 | OCVContext *s = ctx->priv; | |
358 | AVFilterLink *outlink= inlink->dst->outputs[0]; | |
359 | AVFrame *out; | |
360 | IplImage inimg, outimg; | |
361 | ||
362 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); | |
363 | if (!out) { | |
364 | av_frame_free(&in); | |
365 | return AVERROR(ENOMEM); | |
366 | } | |
367 | av_frame_copy_props(out, in); | |
368 | ||
369 | fill_iplimage_from_frame(&inimg , in , inlink->format); | |
370 | fill_iplimage_from_frame(&outimg, out, inlink->format); | |
371 | s->end_frame_filter(ctx, &inimg, &outimg); | |
372 | fill_frame_from_iplimage(out, &outimg, inlink->format); | |
373 | ||
374 | av_frame_free(&in); | |
375 | ||
376 | return ff_filter_frame(outlink, out); | |
377 | } | |
378 | ||
379 | #define OFFSET(x) offsetof(OCVContext, x) | |
380 | #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | |
381 | static const AVOption ocv_options[] = { | |
382 | { "filter_name", NULL, OFFSET(name), AV_OPT_TYPE_STRING, .flags = FLAGS }, | |
383 | { "filter_params", NULL, OFFSET(params), AV_OPT_TYPE_STRING, .flags = FLAGS }, | |
384 | { NULL } | |
385 | }; | |
386 | ||
387 | AVFILTER_DEFINE_CLASS(ocv); | |
388 | ||
389 | static const AVFilterPad avfilter_vf_ocv_inputs[] = { | |
390 | { | |
391 | .name = "default", | |
392 | .type = AVMEDIA_TYPE_VIDEO, | |
393 | .filter_frame = filter_frame, | |
394 | }, | |
395 | { NULL } | |
396 | }; | |
397 | ||
398 | static const AVFilterPad avfilter_vf_ocv_outputs[] = { | |
399 | { | |
400 | .name = "default", | |
401 | .type = AVMEDIA_TYPE_VIDEO, | |
402 | }, | |
403 | { NULL } | |
404 | }; | |
405 | ||
406 | AVFilter ff_vf_ocv = { | |
407 | .name = "ocv", | |
408 | .description = NULL_IF_CONFIG_SMALL("Apply transform using libopencv."), | |
409 | .priv_size = sizeof(OCVContext), | |
410 | .priv_class = &ocv_class, | |
411 | .query_formats = query_formats, | |
412 | .init = init, | |
413 | .uninit = uninit, | |
414 | .inputs = avfilter_vf_ocv_inputs, | |
415 | .outputs = avfilter_vf_ocv_outputs, | |
416 | }; |