aboutsummaryrefslogtreecommitdiffstats
path: root/vhook/fish.c
blob: 62fad491682c968c9e99d3526ff1d1ee5811d3c6 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
/*
 * Fish Detector Hook
 * Copyright (c) 2002 Philip Gladstone
 *
 * This file implements a fish detector. It is used to see when a
 * goldfish passes in front of the camera. It does this by counting
 * the number of input pixels that fall within a particular HSV
 * range.
 *
 * It takes a multitude of arguments:
 *
 * -h <num>-<num>    the range of H values that are fish
 * -s <num>-<num>    the range of S values that are fish
 * -v <num>-<num>    the range of V values that are fish
 * -z                zap all non-fish values to black
 * -l <num>          limit the number of saved files to <num>
 * -i <num>          only check frames every <num> seconds
 * -t <num>          the threshold for the amount of fish pixels (range 0-1)
 * -d                turn debugging on
 * -D <directory>    where to put the fish images
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <stdio.h>
#include <dirent.h>

#include "framehook.h"
#include "dsputil.h"
#include "avformat.h"

#define SCALEBITS 10
#define ONE_HALF  (1 << (SCALEBITS - 1))
#define FIX(x)    ((int) ((x) * (1<<SCALEBITS) + 0.5))

#define YUV_TO_RGB1_CCIR(cb1, cr1)\
{\
    cb = (cb1) - 128;\
    cr = (cr1) - 128;\
    r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\
    g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \
                    ONE_HALF;\
    b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\
}

#define YUV_TO_RGB2_CCIR(r, g, b, y1)\
{\
    yt = ((y1) - 16) * FIX(255.0/219.0);\
    r = cm[(yt + r_add) >> SCALEBITS];\
    g = cm[(yt + g_add) >> SCALEBITS];\
    b = cm[(yt + b_add) >> SCALEBITS];\
}




typedef struct {
    int h;  /* 0 .. 360 */
    int s;  /* 0 .. 255 */
    int v;  /* 0 .. 255 */
} HSV;

typedef struct {
    int zapping;
    int threshold;
    HSV dark, bright;
    char *dir;
    int file_limit;
    int debug;
    int min_interval;
    int64_t next_pts;
    int inset;
    int min_width;
} ContextInfo;

static void dorange(const char *s, int *first, int *second, int maxval)
{
    sscanf(s, "%d-%d", first, second);
    if (*first > maxval)
        *first = maxval;
    if (*second > maxval)
        *second = maxval;
}

void Release(void *ctx)
{
    if (ctx)
        av_free(ctx);
}

int Configure(void **ctxp, int argc, char *argv[])
{
    ContextInfo *ci;
    int c;

    *ctxp = av_mallocz(sizeof(ContextInfo));
    ci = (ContextInfo *) *ctxp;

    optind = 0;

    ci->dir = "/tmp";
    ci->threshold = 100;
    ci->file_limit = 100;
    ci->min_interval = 1000000;
    ci->inset = 10;     /* Percent */

    while ((c = getopt(argc, argv, "w:i:dh:s:v:zl:t:D:")) > 0) {
        switch (c) {
            case 'h':
                dorange(optarg, &ci->dark.h, &ci->bright.h, 360);
                break;
            case 's':
                dorange(optarg, &ci->dark.s, &ci->bright.s, 255);
                break;
            case 'v':
                dorange(optarg, &ci->dark.v, &ci->bright.v, 255);
                break;
            case 'z':
                ci->zapping = 1;
                break;
            case 'l':
                ci->file_limit = atoi(optarg);
                break;
            case 'i':
                ci->min_interval = 1000000 * atof(optarg);
                break;
            case 't':
                ci->threshold = atof(optarg) * 1000;
                if (ci->threshold > 1000 || ci->threshold < 0) {
                    fprintf(stderr, "Invalid threshold value '%s' (range is 0-1)\n", optarg);
                    return -1;
                }
                break;
            case 'w':
                ci->min_width = atoi(optarg);
                break;
            case 'd':
                ci->debug++;
                break;
            case 'D':
                ci->dir = av_strdup(optarg);
                break;
            default:
                fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
                return -1;
        }
    }

    fprintf(stderr, "Fish detector configured:\n");
    fprintf(stderr, "    HSV range: %d,%d,%d - %d,%d,%d\n",
                        ci->dark.h,
                        ci->dark.s,
                        ci->dark.v,
                        ci->bright.h,
                        ci->bright.s,
                        ci->bright.v);
    fprintf(stderr, "    Threshold is %d%% pixels\n", ci->threshold / 10);


    return 0;
}

static void get_hsv(HSV *hsv, int r, int g, int b)
{
    int i, v, x, f;

    x = (r < g) ? r : g;
    if (b < x)
        x = b;
    v = (r > g) ? r : g;
    if (b > v)
        v = b;

    if (v == x) {
        hsv->h = 0;
        hsv->s = 0;
        hsv->v = v;
        return;
    }

    if (r == v) {
        f = g - b;
        i = 0;
    } else if (g == v) {
        f = b - r;
        i = 2 * 60;
    } else {
        f = r - g;
        i = 4 * 60;
    }

    hsv->h = i + (60 * f) / (v - x);
    if (hsv->h < 0)
        hsv->h += 360;

    hsv->s = (255 * (v - x)) / v;
    hsv->v = v;

    return;
}

void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
{
    ContextInfo *ci = (ContextInfo *) ctx;
    uint8_t *cm = cropTbl + MAX_NEG_CROP;
    int rowsize = picture->linesize[0];

#if 0
    printf("pix_fmt = %d, width = %d, pts = %lld, ci->next_pts = %lld\n",
        pix_fmt, width, pts, ci->next_pts);
#endif

    if (pts < ci->next_pts)
        return;

    if (width < ci->min_width)
        return;

    ci->next_pts = pts + 1000000;

    if (pix_fmt == PIX_FMT_YUV420P) {
        uint8_t *y, *u, *v;
        int width2 = width >> 1;
        int inrange = 0;
        int pixcnt;
        int h;
        int h_start, h_end;
        int w_start, w_end;

        h_end = 2 * ((ci->inset * height) / 200);
        h_start = height - h_end;

        w_end = (ci->inset * width2) / 100;
        w_start = width2 - w_end;

        pixcnt = ((h_start - h_end) >> 1) * (w_start - w_end);

        y = picture->data[0] + h_end * picture->linesize[0] + w_end * 2;
        u = picture->data[1] + h_end * picture->linesize[1] / 2 + w_end;
        v = picture->data[2] + h_end * picture->linesize[2] / 2 + w_end;

        for (h = h_start; h > h_end; h -= 2) {
            int w;

            for (w = w_start; w > w_end; w--) {
                unsigned int r,g,b;
                HSV hsv;
                int cb, cr, yt, r_add, g_add, b_add;

                YUV_TO_RGB1_CCIR(u[0], v[0]);
                YUV_TO_RGB2_CCIR(r, g, b, y[0]);

                get_hsv(&hsv, r, g, b);

                if (ci->debug > 1)
                    fprintf(stderr, "(%d,%d,%d) -> (%d,%d,%d)\n",
                        r,g,b,hsv.h,hsv.s,hsv.v);


                if (hsv.h >= ci->dark.h && hsv.h <= ci->bright.h &&
                    hsv.s >= ci->dark.s && hsv.s <= ci->bright.s &&
                    hsv.v >= ci->dark.v && hsv.v <= ci->bright.v) {
                    inrange++;
                } else if (ci->zapping) {
                    y[0] = y[1] = y[rowsize] = y[rowsize + 1] = 16;
                    u[0] = 128;
                    v[0] = 128;
                }

                y+= 2;
                u++;
                v++;
            }

            y += picture->linesize[0] * 2 - (w_start - w_end) * 2;
            u += picture->linesize[1] - (w_start - w_end);
            v += picture->linesize[2] - (w_start - w_end);
        }

        if (ci->debug)
            fprintf(stderr, "Fish: Inrange=%d of %d = %d threshold\n", inrange, pixcnt, 1000 * inrange / pixcnt);

        if (inrange * 1000 / pixcnt >= ci->threshold) {
            /* Save to file */
            int size;
            char *buf;
            AVPicture picture1;
            static int frame_counter;
            static int foundfile;

            if ((frame_counter++ % 20) == 0) {
                /* Check how many files we have */
                DIR *d;

                foundfile = 0;

                d = opendir(ci->dir);
                if (d) {
                    struct dirent *dent;

                    while ((dent = readdir(d))) {
                        if (strncmp("fishimg", dent->d_name, 7) == 0) {
                            if (strcmp(".ppm", dent->d_name + strlen(dent->d_name) - 4) == 0) {
                                foundfile++;
                            }
                        }
                    }
                    closedir(d);
                }
            }

            if (foundfile < ci->file_limit) {
                size = avpicture_get_size(PIX_FMT_RGB24, width, height);
                buf = av_malloc(size);

                avpicture_fill(&picture1, buf, PIX_FMT_RGB24, width, height);
                if (img_convert(&picture1, PIX_FMT_RGB24,
                                picture, pix_fmt, width, height) >= 0) {
                    /* Write out the PPM file */

                    FILE *f;
                    char fname[256];

                    snprintf(fname, sizeof(fname), "%s/fishimg%ld_%"PRId64".ppm", ci->dir, (long)(av_gettime() / 1000000), pts);
                    f = fopen(fname, "w");
                    if (f) {
                        fprintf(f, "P6 %d %d 255\n", width, height);
                        fwrite(buf, width * height * 3, 1, f);
                        fclose(f);
                    }
                }

                av_free(buf);
                ci->next_pts = pts + ci->min_interval;
            }
        }
    }
}