3 * Copyright (c) 2002 Philip Gladstone
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
10 * It takes a multitude of arguments:
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
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.
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.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
45 #include "framehook.h"
50 #define ONE_HALF (1 << (SCALEBITS - 1))
51 #define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
53 #define YUV_TO_RGB1_CCIR(cb1, cr1)\
57 r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\
58 g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \
60 b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\
63 #define YUV_TO_RGB2_CCIR(r, g, b, y1)\
65 yt = ((y1) - 16) * FIX(255.0/219.0);\
66 r = cm[(yt + r_add) >> SCALEBITS];\
67 g = cm[(yt + g_add) >> SCALEBITS];\
68 b = cm[(yt + b_add) >> SCALEBITS];\
93 static void dorange(const char *s, int *first, int *second, int maxval)
95 sscanf(s, "%d-%d", first, second);
102 void Release(void *ctx)
108 int Configure(void **ctxp, int argc, char *argv[])
113 *ctxp = av_mallocz(sizeof(ContextInfo));
114 ci = (ContextInfo *) *ctxp;
120 ci->file_limit = 100;
121 ci->min_interval = 1000000;
122 ci->inset = 10; /* Percent */
124 while ((c = getopt(argc, argv, "w:i:dh:s:v:zl:t:D:")) > 0) {
127 dorange(optarg, &ci->dark.h, &ci->bright.h, 360);
130 dorange(optarg, &ci->dark.s, &ci->bright.s, 255);
133 dorange(optarg, &ci->dark.v, &ci->bright.v, 255);
139 ci->file_limit = atoi(optarg);
142 ci->min_interval = 1000000 * atof(optarg);
145 ci->threshold = atof(optarg) * 1000;
146 if (ci->threshold > 1000 || ci->threshold < 0) {
147 fprintf(stderr, "Invalid threshold value '%s' (range is 0-1)\n", optarg);
152 ci->min_width = atoi(optarg);
158 ci->dir = av_strdup(optarg);
161 fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
166 fprintf(stderr, "Fish detector configured:\n");
167 fprintf(stderr, " HSV range: %d,%d,%d - %d,%d,%d\n",
174 fprintf(stderr, " Threshold is %d%% pixels\n", ci->threshold / 10);
180 static void get_hsv(HSV *hsv, int r, int g, int b)
209 hsv->h = i + (60 * f) / (v - x);
213 hsv->s = (255 * (v - x)) / v;
219 void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
221 ContextInfo *ci = (ContextInfo *) ctx;
222 uint8_t *cm = cropTbl + MAX_NEG_CROP;
223 int rowsize = picture->linesize[0];
226 printf("pix_fmt = %d, width = %d, pts = %lld, ci->next_pts = %lld\n",
227 pix_fmt, width, pts, ci->next_pts);
230 if (pts < ci->next_pts)
233 if (width < ci->min_width)
236 ci->next_pts = pts + 1000000;
238 if (pix_fmt == PIX_FMT_YUV420P) {
240 int width2 = width >> 1;
247 h_end = 2 * ((ci->inset * height) / 200);
248 h_start = height - h_end;
250 w_end = (ci->inset * width2) / 100;
251 w_start = width2 - w_end;
253 pixcnt = ((h_start - h_end) >> 1) * (w_start - w_end);
255 y = picture->data[0] + h_end * picture->linesize[0] + w_end * 2;
256 u = picture->data[1] + h_end * picture->linesize[1] / 2 + w_end;
257 v = picture->data[2] + h_end * picture->linesize[2] / 2 + w_end;
259 for (h = h_start; h > h_end; h -= 2) {
262 for (w = w_start; w > w_end; w--) {
265 int cb, cr, yt, r_add, g_add, b_add;
267 YUV_TO_RGB1_CCIR(u[0], v[0]);
268 YUV_TO_RGB2_CCIR(r, g, b, y[0]);
270 get_hsv(&hsv, r, g, b);
273 fprintf(stderr, "(%d,%d,%d) -> (%d,%d,%d)\n",
274 r,g,b,hsv.h,hsv.s,hsv.v);
277 if (hsv.h >= ci->dark.h && hsv.h <= ci->bright.h &&
278 hsv.s >= ci->dark.s && hsv.s <= ci->bright.s &&
279 hsv.v >= ci->dark.v && hsv.v <= ci->bright.v) {
281 } else if (ci->zapping) {
282 y[0] = y[1] = y[rowsize] = y[rowsize + 1] = 16;
292 y += picture->linesize[0] * 2 - (w_start - w_end) * 2;
293 u += picture->linesize[1] - (w_start - w_end);
294 v += picture->linesize[2] - (w_start - w_end);
298 fprintf(stderr, "Fish: Inrange=%d of %d = %d threshold\n", inrange, pixcnt, 1000 * inrange / pixcnt);
300 if (inrange * 1000 / pixcnt >= ci->threshold) {
305 static int frame_counter;
306 static int foundfile;
308 if ((frame_counter++ % 20) == 0) {
309 /* Check how many files we have */
314 d = opendir(ci->dir);
318 while ((dent = readdir(d))) {
319 if (strncmp("fishimg", dent->d_name, 7) == 0) {
320 if (strcmp(".ppm", dent->d_name + strlen(dent->d_name) - 4) == 0) {
329 if (foundfile < ci->file_limit) {
330 size = avpicture_get_size(PIX_FMT_RGB24, width, height);
331 buf = av_malloc(size);
333 avpicture_fill(&picture1, buf, PIX_FMT_RGB24, width, height);
334 if (img_convert(&picture1, PIX_FMT_RGB24,
335 picture, pix_fmt, width, height) >= 0) {
336 /* Write out the PPM file */
341 snprintf(fname, sizeof(fname), "%s/fishimg%ld_%"PRId64".ppm", ci->dir, (long)(av_gettime() / 1000000), pts);
342 f = fopen(fname, "w");
344 fprintf(f, "P6 %d %d 255\n", width, height);
345 fwrite(buf, width * height * 3, 1, f);
351 ci->next_pts = pts + ci->min_interval;