Added a release function to free up the context. Also removed the dummy
[libav.git] / vhook / fish.c
1 /*
2 * Fish Detector Hook
3 * Copyright (c) 2002 Philip Gladstone
4 *
5 * This file implements a fish detector. It is used to see when a
6 * goldfish passes in front of the camera. It does this by counting
7 * the number of input pixels that fall within a particular HSV
8 * range.
9 *
10 * It takes a multitude of arguments:
11 *
12 * -h <num>-<num> the range of H values that are fish
13 * -s <num>-<num> the range of S values that are fish
14 * -v <num>-<num> the range of V values that are fish
15 * -z zap all non-fish values to black
16 * -l <num> limit the number of saved files to <num>
17 * -i <num> only check frames every <num> seconds
18 * -t <num> the threshold for the amount of fish pixels (range 0-1)
19 * -d turn debugging on
20 * -D <directory> where to put the fish images
21 *
22 * This library is free software; you can redistribute it and/or
23 * modify it under the terms of the GNU Lesser General Public
24 * License as published by the Free Software Foundation; either
25 * version 2 of the License, or (at your option) any later version.
26 *
27 * This library is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
30 * Lesser General Public License for more details.
31 *
32 * You should have received a copy of the GNU Lesser General Public
33 * License along with this library; if not, write to the Free Software
34 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
35 */
36 #include <stdlib.h>
37 #include <fcntl.h>
38 #include <unistd.h>
39 #include <stdarg.h>
40 #include <string.h>
41 #include <time.h>
42 #include <stdio.h>
43 #include <dirent.h>
44
45 #include "framehook.h"
46 #include "dsputil.h"
47
48 #define SCALE_BITS 10
49
50 #define C_Y (76309 >> (16 - SCALE_BITS))
51 #define C_RV (117504 >> (16 - SCALE_BITS))
52 #define C_BU (138453 >> (16 - SCALE_BITS))
53 #define C_GU (13954 >> (16 - SCALE_BITS))
54 #define C_GV (34903 >> (16 - SCALE_BITS))
55
56
57 typedef struct {
58 int h; /* 0 .. 360 */
59 int s; /* 0 .. 255 */
60 int v; /* 0 .. 255 */
61 } HSV;
62
63 typedef struct {
64 int zapping;
65 int threshold;
66 HSV dark, bright;
67 char *dir;
68 int file_limit;
69 int debug;
70 int min_interval;
71 INT64 next_pts;
72 int inset;
73 int min_width;
74 } ContextInfo;
75
76 static void dorange(const char *s, int *first, int *second, int maxval)
77 {
78 sscanf(s, "%d-%d", first, second);
79 if (*first > maxval)
80 *first = maxval;
81 if (*second > maxval)
82 *second = maxval;
83 }
84
85 void Release(void *ctx)
86 {
87 if (ctx)
88 av_free(ctx);
89 }
90
91 int Configure(void **ctxp, int argc, char *argv[])
92 {
93 ContextInfo *ci;
94 int c;
95
96 *ctxp = av_mallocz(sizeof(ContextInfo));
97 ci = (ContextInfo *) *ctxp;
98
99 optind = 0;
100
101 ci->dir = "/tmp";
102 ci->threshold = 1000;
103 ci->file_limit = 100;
104 ci->min_interval = 1000000;
105 ci->inset = 10; /* Percent */
106
107 while ((c = getopt(argc, argv, "w:i:dh:s:v:zl:t:D:")) > 0) {
108 switch (c) {
109 case 'h':
110 dorange(optarg, &ci->dark.h, &ci->bright.h, 360);
111 break;
112 case 's':
113 dorange(optarg, &ci->dark.s, &ci->bright.s, 255);
114 break;
115 case 'v':
116 dorange(optarg, &ci->dark.v, &ci->bright.v, 255);
117 break;
118 case 'z':
119 ci->zapping = 1;
120 break;
121 case 'l':
122 ci->file_limit = atoi(optarg);
123 break;
124 case 'i':
125 ci->min_interval = 1000000 * atof(optarg);
126 break;
127 case 't':
128 ci->threshold = atof(optarg) * 1000;
129 break;
130 case 'w':
131 ci->min_width = atoi(optarg);
132 break;
133 case 'd':
134 ci->debug++;
135 break;
136 case 'D':
137 ci->dir = strdup(optarg);
138 break;
139 default:
140 fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
141 return -1;
142 }
143 }
144
145 fprintf(stderr, "Fish detector configured:\n");
146 fprintf(stderr, " HSV range: %d,%d,%d - %d,%d,%d\n",
147 ci->dark.h,
148 ci->dark.s,
149 ci->dark.v,
150 ci->bright.h,
151 ci->bright.s,
152 ci->bright.v);
153
154 return 0;
155 }
156
157 static void get_hsv(HSV *hsv, int r, int g, int b)
158 {
159 int i, v, x, f;
160
161 x = (r < g) ? r : g;
162 if (b < x)
163 x = b;
164 v = (r > g) ? r : g;
165 if (b > v)
166 v = b;
167
168 if (v == x) {
169 hsv->h = 0;
170 hsv->s = 0;
171 hsv->v = v;
172 return;
173 }
174
175 if (r == v) {
176 f = g - b;
177 i = 0;
178 } else if (g == v) {
179 f = b - r;
180 i = 2 * 60;
181 } else {
182 f = r - g;
183 i = 4 * 60;
184 }
185
186 hsv->h = i + (60 * f) / (v - x);
187 if (hsv->h < 0)
188 hsv->h += 360;
189
190 hsv->s = (255 * (v - x)) / v;
191 hsv->v = v;
192
193 return;
194 }
195
196 void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, INT64 pts)
197 {
198 ContextInfo *ci = (ContextInfo *) ctx;
199 UINT8 *cm = cropTbl + MAX_NEG_CROP;
200 int rowsize = picture->linesize[0];
201
202 if (pts < ci->next_pts)
203 return;
204
205 if (width < ci->min_width)
206 return;
207
208 ci->next_pts = pts + 1000000;
209
210 if (pix_fmt == PIX_FMT_YUV420P) {
211 UINT8 *y, *u, *v;
212 int width2 = width >> 1;
213 int inrange = 0;
214 int pixcnt;
215 int h;
216 int h_start, h_end;
217 int w_start, w_end;
218
219 h_end = 2 * ((ci->inset * height) / 200);
220 h_start = height - h_end;
221
222 w_end = (ci->inset * width2) / 100;
223 w_start = width2 - w_end;
224
225 pixcnt = ((h_start - h_end) >> 1) * (w_start - w_end);
226
227 y = picture->data[0];
228 u = picture->data[1];
229 v = picture->data[2];
230
231 for (h = h_start; h > h_end; h -= 2) {
232 int w;
233
234 for (w = w_start; w > w_end; w--) {
235 int r,g,b;
236 int Y, U, V;
237 HSV hsv;
238
239 U = u[0] - 128;
240 V = v[0] - 128;
241
242 Y = (y[0] - 16) * C_Y;
243
244 r = cm[(Y + C_RV * V + (1 << (SCALE_BITS - 1))) >> SCALE_BITS];
245 g = cm[(Y + - C_GU * U - C_GV * V + (1 << (SCALE_BITS - 1))) >> SCALE_BITS];
246 b = cm[(Y + C_BU * U + (1 << (SCALE_BITS - 1))) >> SCALE_BITS];
247
248 get_hsv(&hsv, r, g, b);
249
250 if (ci->debug > 1)
251 fprintf(stderr, "(%d,%d,%d) -> (%d,%d,%d)\n",
252 r,g,b,hsv.h,hsv.s,hsv.v);
253
254
255 if (hsv.h >= ci->dark.h && hsv.h <= ci->bright.h &&
256 hsv.s >= ci->dark.s && hsv.s <= ci->bright.s &&
257 hsv.v >= ci->dark.v && hsv.v <= ci->bright.v) {
258 inrange++;
259 } else if (ci->zapping) {
260 y[0] = y[1] = y[rowsize] = y[rowsize + 1] = 0;
261 }
262
263 y+= 2;
264 u++;
265 v++;
266 }
267
268 y += picture->linesize[0] * 2 - width;
269 u += picture->linesize[1] - width2;
270 v += picture->linesize[2] - width2;
271 }
272
273 if (inrange * 1000 / pixcnt >= ci->threshold) {
274 /* Save to file */
275 int size;
276 char *buf;
277 AVPicture picture1;
278 static int frame_counter;
279 static int foundfile;
280
281 if (ci->debug)
282 fprintf(stderr, "Fish: Inrange=%d of %d = %d threshold\n", inrange, pixcnt, 1000 * inrange / pixcnt);
283
284 if ((frame_counter++ % 20) == 0) {
285 /* Check how many files we have */
286 DIR *d;
287
288 foundfile = 0;
289
290 d = opendir(ci->dir);
291 if (d) {
292 struct dirent *dent;
293
294 while ((dent = readdir(d))) {
295 if (strncmp("fishimg", dent->d_name, 7) == 0) {
296 if (strcmp(".ppm", dent->d_name + strlen(dent->d_name) - 4) == 0) {
297 foundfile++;
298 }
299 }
300 }
301 closedir(d);
302 }
303 }
304
305 if (foundfile < ci->file_limit) {
306 size = avpicture_get_size(PIX_FMT_RGB24, width, height);
307 buf = av_malloc(size);
308
309 avpicture_fill(&picture1, buf, PIX_FMT_RGB24, width, height);
310 if (img_convert(&picture1, PIX_FMT_RGB24,
311 picture, pix_fmt, width, height) >= 0) {
312 /* Write out the PPM file */
313
314 FILE *f;
315 char fname[256];
316
317 sprintf(fname, "%s/fishimg%ld_%lld.ppm", ci->dir, time(0), pts);
318 f = fopen(fname, "w");
319 if (f) {
320 fprintf(f, "P6 %d %d 255\n", width, height);
321 fwrite(buf, width * height * 3, 1, f);
322 fclose(f);
323 }
324 }
325
326 av_free(buf);
327 ci->next_pts = pts + ci->min_interval;
328 }
329 }
330 }
331 }
332