| 1 | /*
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| 2 | * Fish Detector Hook
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| 3 | * Copyright (c) 2002 Philip Gladstone
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| 4 | *
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| 5 | * This file implements a fish detector. It is used to see when a
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| 6 | * goldfish passes in front of the camera. It does this by counting
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| 7 | * the number of input pixels that fall within a particular HSV
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| 8 | * range.
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| 9 | *
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| 10 | * It takes a multitude of arguments:
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| 11 | *
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| 12 | * -h <num>-<num> the range of H values that are fish
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| 13 | * -s <num>-<num> the range of S values that are fish
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| 14 | * -v <num>-<num> the range of V values that are fish
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| 15 | * -z zap all non-fish values to black
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| 16 | * -l <num> limit the number of saved files to <num>
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| 17 | * -i <num> only check frames every <num> seconds
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| 18 | * -t <num> the threshold for the amount of fish pixels (range 0-1)
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| 19 | * -d turn debugging on
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| 20 | * -D <directory> where to put the fish images
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| 21 | *
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| 22 | * This library is free software; you can redistribute it and/or
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| 23 | * modify it under the terms of the GNU Lesser General Public
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| 24 | * License as published by the Free Software Foundation; either
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| 25 | * version 2 of the License, or (at your option) any later version.
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| 26 | *
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| 27 | * This library is distributed in the hope that it will be useful,
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| 28 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 29 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 30 | * Lesser General Public License for more details.
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| 31 | *
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| 32 | * You should have received a copy of the GNU Lesser General Public
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| 33 | * License along with this library; if not, write to the Free Software
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| 34 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 35 | */
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| 36 | #include <stdlib.h>
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| 37 | #include <fcntl.h>
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| 38 | #include <unistd.h>
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| 39 | #include <stdarg.h>
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| 40 | #include <string.h>
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| 41 | #include <time.h>
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| 42 | #include <stdio.h>
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| 43 | #include <dirent.h>
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| 44 |
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| 45 | #include "framehook.h"
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| 46 | #include "dsputil.h"
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| 47 | #include "avformat.h"
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| 48 |
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| 49 | #define SCALEBITS 10
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| 50 | #define ONE_HALF (1 << (SCALEBITS - 1))
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| 51 | #define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
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| 52 |
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| 53 | #define YUV_TO_RGB1_CCIR(cb1, cr1)\
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| 54 | {\
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| 55 | cb = (cb1) - 128;\
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| 56 | cr = (cr1) - 128;\
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| 57 | r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\
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| 58 | g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \
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| 59 | ONE_HALF;\
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| 60 | b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\
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| 61 | }
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| 62 |
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| 63 | #define YUV_TO_RGB2_CCIR(r, g, b, y1)\
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| 64 | {\
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| 65 | yt = ((y1) - 16) * FIX(255.0/219.0);\
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| 66 | r = cm[(yt + r_add) >> SCALEBITS];\
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| 67 | g = cm[(yt + g_add) >> SCALEBITS];\
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| 68 | b = cm[(yt + b_add) >> SCALEBITS];\
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| 69 | }
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| 70 |
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| 71 |
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| 72 |
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| 73 |
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| 74 | typedef struct {
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| 75 | int h; /* 0 .. 360 */
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| 76 | int s; /* 0 .. 255 */
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| 77 | int v; /* 0 .. 255 */
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| 78 | } HSV;
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| 79 |
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| 80 | typedef struct {
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| 81 | int zapping;
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| 82 | int threshold;
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| 83 | HSV dark, bright;
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| 84 | char *dir;
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| 85 | int file_limit;
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| 86 | int debug;
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| 87 | int min_interval;
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| 88 | int64_t next_pts;
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| 89 | int inset;
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| 90 | int min_width;
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| 91 | } ContextInfo;
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| 92 |
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| 93 | static void dorange(const char *s, int *first, int *second, int maxval)
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| 94 | {
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| 95 | sscanf(s, "%d-%d", first, second);
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| 96 | if (*first > maxval)
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| 97 | *first = maxval;
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| 98 | if (*second > maxval)
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| 99 | *second = maxval;
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| 100 | }
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| 101 |
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| 102 | void Release(void *ctx)
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| 103 | {
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| 104 | if (ctx)
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| 105 | av_free(ctx);
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| 106 | }
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| 107 |
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| 108 | int Configure(void **ctxp, int argc, char *argv[])
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| 109 | {
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| 110 | ContextInfo *ci;
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| 111 | int c;
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| 112 |
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| 113 | *ctxp = av_mallocz(sizeof(ContextInfo));
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| 114 | ci = (ContextInfo *) *ctxp;
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| 115 |
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| 116 | optind = 0;
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| 117 |
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| 118 | ci->dir = "/tmp";
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| 119 | ci->threshold = 100;
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| 120 | ci->file_limit = 100;
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| 121 | ci->min_interval = 1000000;
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| 122 | ci->inset = 10; /* Percent */
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| 123 |
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| 124 | while ((c = getopt(argc, argv, "w:i:dh:s:v:zl:t:D:")) > 0) {
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| 125 | switch (c) {
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| 126 | case 'h':
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| 127 | dorange(optarg, &ci->dark.h, &ci->bright.h, 360);
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| 128 | break;
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| 129 | case 's':
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| 130 | dorange(optarg, &ci->dark.s, &ci->bright.s, 255);
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| 131 | break;
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| 132 | case 'v':
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| 133 | dorange(optarg, &ci->dark.v, &ci->bright.v, 255);
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| 134 | break;
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| 135 | case 'z':
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| 136 | ci->zapping = 1;
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| 137 | break;
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| 138 | case 'l':
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| 139 | ci->file_limit = atoi(optarg);
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| 140 | break;
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| 141 | case 'i':
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| 142 | ci->min_interval = 1000000 * atof(optarg);
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| 143 | break;
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| 144 | case 't':
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| 145 | ci->threshold = atof(optarg) * 1000;
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| 146 | if (ci->threshold > 1000 || ci->threshold < 0) {
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| 147 | fprintf(stderr, "Invalid threshold value '%s' (range is 0-1)\n", optarg);
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| 148 | return -1;
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| 149 | }
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| 150 | break;
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| 151 | case 'w':
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| 152 | ci->min_width = atoi(optarg);
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| 153 | break;
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| 154 | case 'd':
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| 155 | ci->debug++;
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| 156 | break;
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| 157 | case 'D':
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| 158 | ci->dir = av_strdup(optarg);
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| 159 | break;
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| 160 | default:
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| 161 | fprintf(stderr, "Unrecognized argument '%s'\n", argv[optind]);
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| 162 | return -1;
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| 163 | }
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| 164 | }
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| 165 |
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| 166 | fprintf(stderr, "Fish detector configured:\n");
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| 167 | fprintf(stderr, " HSV range: %d,%d,%d - %d,%d,%d\n",
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| 168 | ci->dark.h,
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| 169 | ci->dark.s,
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| 170 | ci->dark.v,
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| 171 | ci->bright.h,
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| 172 | ci->bright.s,
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| 173 | ci->bright.v);
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| 174 | fprintf(stderr, " Threshold is %d%% pixels\n", ci->threshold / 10);
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| 175 |
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| 176 |
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| 177 | return 0;
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| 178 | }
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| 179 |
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| 180 | static void get_hsv(HSV *hsv, int r, int g, int b)
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| 181 | {
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| 182 | int i, v, x, f;
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| 183 |
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| 184 | x = (r < g) ? r : g;
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| 185 | if (b < x)
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| 186 | x = b;
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| 187 | v = (r > g) ? r : g;
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| 188 | if (b > v)
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| 189 | v = b;
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| 190 |
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| 191 | if (v == x) {
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| 192 | hsv->h = 0;
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| 193 | hsv->s = 0;
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| 194 | hsv->v = v;
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| 195 | return;
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| 196 | }
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| 197 |
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| 198 | if (r == v) {
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| 199 | f = g - b;
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| 200 | i = 0;
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| 201 | } else if (g == v) {
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| 202 | f = b - r;
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| 203 | i = 2 * 60;
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| 204 | } else {
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| 205 | f = r - g;
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| 206 | i = 4 * 60;
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| 207 | }
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| 208 |
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| 209 | hsv->h = i + (60 * f) / (v - x);
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| 210 | if (hsv->h < 0)
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| 211 | hsv->h += 360;
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| 212 |
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| 213 | hsv->s = (255 * (v - x)) / v;
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| 214 | hsv->v = v;
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| 215 |
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| 216 | return;
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| 217 | }
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| 218 |
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| 219 | void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts)
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| 220 | {
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| 221 | ContextInfo *ci = (ContextInfo *) ctx;
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| 222 | uint8_t *cm = cropTbl + MAX_NEG_CROP;
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| 223 | int rowsize = picture->linesize[0];
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| 224 |
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| 225 | #if 0
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| 226 | printf("pix_fmt = %d, width = %d, pts = %lld, ci->next_pts = %lld\n",
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| 227 | pix_fmt, width, pts, ci->next_pts);
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| 228 | #endif
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| 229 |
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| 230 | if (pts < ci->next_pts)
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| 231 | return;
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| 232 |
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| 233 | if (width < ci->min_width)
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| 234 | return;
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| 235 |
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| 236 | ci->next_pts = pts + 1000000;
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| 237 |
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| 238 | if (pix_fmt == PIX_FMT_YUV420P) {
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| 239 | uint8_t *y, *u, *v;
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| 240 | int width2 = width >> 1;
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| 241 | int inrange = 0;
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| 242 | int pixcnt;
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| 243 | int h;
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| 244 | int h_start, h_end;
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| 245 | int w_start, w_end;
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| 246 |
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| 247 | h_end = 2 * ((ci->inset * height) / 200);
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| 248 | h_start = height - h_end;
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| 249 |
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| 250 | w_end = (ci->inset * width2) / 100;
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| 251 | w_start = width2 - w_end;
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| 252 |
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| 253 | pixcnt = ((h_start - h_end) >> 1) * (w_start - w_end);
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| 254 |
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| 255 | y = picture->data[0] + h_end * picture->linesize[0] + w_end * 2;
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| 256 | u = picture->data[1] + h_end * picture->linesize[1] / 2 + w_end;
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| 257 | v = picture->data[2] + h_end * picture->linesize[2] / 2 + w_end;
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| 258 |
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| 259 | for (h = h_start; h > h_end; h -= 2) {
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| 260 | int w;
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| 261 |
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| 262 | for (w = w_start; w > w_end; w--) {
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| 263 | unsigned int r,g,b;
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| 264 | HSV hsv;
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| 265 | int cb, cr, yt, r_add, g_add, b_add;
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| 266 |
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| 267 | YUV_TO_RGB1_CCIR(u[0], v[0]);
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| 268 | YUV_TO_RGB2_CCIR(r, g, b, y[0]);
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| 269 |
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| 270 | get_hsv(&hsv, r, g, b);
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| 271 |
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| 272 | if (ci->debug > 1)
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| 273 | fprintf(stderr, "(%d,%d,%d) -> (%d,%d,%d)\n",
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| 274 | r,g,b,hsv.h,hsv.s,hsv.v);
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| 275 |
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| 276 |
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| 277 | if (hsv.h >= ci->dark.h && hsv.h <= ci->bright.h &&
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| 278 | hsv.s >= ci->dark.s && hsv.s <= ci->bright.s &&
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| 279 | hsv.v >= ci->dark.v && hsv.v <= ci->bright.v) {
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| 280 | inrange++;
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| 281 | } else if (ci->zapping) {
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| 282 | y[0] = y[1] = y[rowsize] = y[rowsize + 1] = 16;
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| 283 | u[0] = 128;
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| 284 | v[0] = 128;
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| 285 | }
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| 286 |
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| 287 | y+= 2;
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| 288 | u++;
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| 289 | v++;
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| 290 | }
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| 291 |
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| 292 | y += picture->linesize[0] * 2 - (w_start - w_end) * 2;
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| 293 | u += picture->linesize[1] - (w_start - w_end);
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| 294 | v += picture->linesize[2] - (w_start - w_end);
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| 295 | }
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| 296 |
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| 297 | if (ci->debug)
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| 298 | fprintf(stderr, "Fish: Inrange=%d of %d = %d threshold\n", inrange, pixcnt, 1000 * inrange / pixcnt);
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| 299 |
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| 300 | if (inrange * 1000 / pixcnt >= ci->threshold) {
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| 301 | /* Save to file */
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| 302 | int size;
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| 303 | char *buf;
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| 304 | AVPicture picture1;
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| 305 | static int frame_counter;
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| 306 | static int foundfile;
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| 307 |
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| 308 | if ((frame_counter++ % 20) == 0) {
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| 309 | /* Check how many files we have */
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| 310 | DIR *d;
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| 311 |
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| 312 | foundfile = 0;
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| 313 |
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| 314 | d = opendir(ci->dir);
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| 315 | if (d) {
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| 316 | struct dirent *dent;
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| 317 |
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| 318 | while ((dent = readdir(d))) {
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| 319 | if (strncmp("fishimg", dent->d_name, 7) == 0) {
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| 320 | if (strcmp(".ppm", dent->d_name + strlen(dent->d_name) - 4) == 0) {
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| 321 | foundfile++;
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| 322 | }
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| 323 | }
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| 324 | }
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| 325 | closedir(d);
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| 326 | }
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| 327 | }
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| 328 |
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| 329 | if (foundfile < ci->file_limit) {
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| 330 | size = avpicture_get_size(PIX_FMT_RGB24, width, height);
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| 331 | buf = av_malloc(size);
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| 332 |
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| 333 | avpicture_fill(&picture1, buf, PIX_FMT_RGB24, width, height);
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| 334 | if (img_convert(&picture1, PIX_FMT_RGB24,
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| 335 | picture, pix_fmt, width, height) >= 0) {
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| 336 | /* Write out the PPM file */
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| 337 |
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| 338 | FILE *f;
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| 339 | char fname[256];
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| 340 |
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| 341 | snprintf(fname, sizeof(fname), "%s/fishimg%ld_%"PRId64".ppm", ci->dir, (long)(av_gettime() / 1000000), pts);
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| 342 | f = fopen(fname, "w");
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| 343 | if (f) {
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| 344 | fprintf(f, "P6 %d %d 255\n", width, height);
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| 345 | fwrite(buf, width * height * 3, 1, f);
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| 346 | fclose(f);
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| 347 | }
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| 348 | }
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| 349 |
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| 350 | av_free(buf);
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| 351 | ci->next_pts = pts + ci->min_interval;
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| 352 | }
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| 353 | }
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| 354 | }
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| 355 | }
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| 356 |
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