ffmpeg / vhook / fish.c @ 5509bffa
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1 | 26b4bb70 | Philip Gladstone | /*
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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 | 115329f1 | Diego Biurrun | * This file implements a fish detector. It is used to see when a
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6 | 26b4bb70 | Philip Gladstone | * 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 | 5509bffa | Diego Biurrun | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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35 | 26b4bb70 | Philip Gladstone | */
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36 | #include <stdlib.h> |
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37 | #include <fcntl.h> |
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38 | 47930f09 | Philip Gladstone | #include <unistd.h> |
39 | 26b4bb70 | Philip Gladstone | #include <stdarg.h> |
40 | #include <string.h> |
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41 | b55e4ef4 | Philip Gladstone | #include <time.h> |
42 | 26b4bb70 | Philip Gladstone | #include <stdio.h> |
43 | #include <dirent.h> |
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44 | |||
45 | #include "framehook.h" |
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46 | #include "dsputil.h" |
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47 | cf344ec7 | François Revol | #include "avformat.h" |
48 | 26b4bb70 | Philip Gladstone | |
49 | 25a2ee7d | Philip Gladstone | #define SCALEBITS 10 |
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 | |||
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 | |||
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 | |||
71 | 26b4bb70 | Philip Gladstone | |
72 | 115329f1 | Diego Biurrun | |
73 | |||
74 | 26b4bb70 | Philip Gladstone | typedef struct { |
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 | 115329f1 | Diego Biurrun | |
80 | 26b4bb70 | Philip Gladstone | typedef struct { |
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 | 0c1a9eda | Zdenek Kabelac | int64_t next_pts; |
89 | 26b4bb70 | Philip Gladstone | int inset;
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90 | int min_width;
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91 | } ContextInfo; |
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92 | |||
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 | |||
102 | 6c11d48c | Philip Gladstone | void Release(void *ctx) |
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 | 26b4bb70 | Philip Gladstone | |
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 | |||
113 | *ctxp = av_mallocz(sizeof(ContextInfo));
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114 | ci = (ContextInfo *) *ctxp; |
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115 | |||
116 | optind = 0;
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117 | |||
118 | ci->dir = "/tmp";
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119 | d9974a48 | Philip Gladstone | ci->threshold = 100;
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120 | 26b4bb70 | Philip Gladstone | 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 | |||
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 | d9974a48 | Philip Gladstone | if (ci->threshold > 1000 || ci->threshold < 0) { |
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 | 26b4bb70 | Philip Gladstone | 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 | e9a9e0c2 | Fabrice Bellard | ci->dir = av_strdup(optarg); |
159 | 26b4bb70 | Philip Gladstone | 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 | |||
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 | 25a2ee7d | Philip Gladstone | fprintf(stderr, " Threshold is %d%% pixels\n", ci->threshold / 10); |
175 | |||
176 | 26b4bb70 | Philip Gladstone | |
177 | return 0; |
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178 | } |
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179 | |||
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 | 115329f1 | Diego Biurrun | |
184 | 26b4bb70 | Philip Gladstone | x = (r < g) ? r : g; |
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 | 115329f1 | Diego Biurrun | |
191 | 26b4bb70 | Philip Gladstone | 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 | 115329f1 | Diego Biurrun | |
198 | 26b4bb70 | Philip Gladstone | 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 | 115329f1 | Diego Biurrun | |
209 | 26b4bb70 | Philip Gladstone | 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 | |||
213 | hsv->s = (255 * (v - x)) / v;
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214 | hsv->v = v; |
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215 | 115329f1 | Diego Biurrun | |
216 | 26b4bb70 | Philip Gladstone | return;
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217 | 115329f1 | Diego Biurrun | } |
218 | 26b4bb70 | Philip Gladstone | |
219 | 0c1a9eda | Zdenek Kabelac | void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width, int height, int64_t pts) |
220 | 26b4bb70 | Philip Gladstone | { |
221 | ContextInfo *ci = (ContextInfo *) ctx; |
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222 | 115329f1 | Diego Biurrun | uint8_t *cm = cropTbl + MAX_NEG_CROP; |
223 | 26b4bb70 | Philip Gladstone | int rowsize = picture->linesize[0]; |
224 | |||
225 | d9974a48 | Philip Gladstone | #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 | |||
230 | 26b4bb70 | Philip Gladstone | if (pts < ci->next_pts)
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231 | return;
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232 | |||
233 | if (width < ci->min_width)
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234 | return;
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235 | |||
236 | 115329f1 | Diego Biurrun | ci->next_pts = pts + 1000000;
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237 | 26b4bb70 | Philip Gladstone | |
238 | if (pix_fmt == PIX_FMT_YUV420P) {
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239 | 0c1a9eda | Zdenek Kabelac | uint8_t *y, *u, *v; |
240 | 26b4bb70 | Philip Gladstone | int width2 = width >> 1; |
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 | |||
247 | h_end = 2 * ((ci->inset * height) / 200); |
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248 | h_start = height - h_end; |
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249 | |||
250 | w_end = (ci->inset * width2) / 100;
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251 | w_start = width2 - w_end; |
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252 | |||
253 | pixcnt = ((h_start - h_end) >> 1) * (w_start - w_end);
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254 | |||
255 | d9974a48 | Philip Gladstone | y = picture->data[0] + h_end * picture->linesize[0] + w_end * 2; |
256 | 25a2ee7d | Philip Gladstone | 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; |
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258 | 26b4bb70 | Philip Gladstone | |
259 | for (h = h_start; h > h_end; h -= 2) { |
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260 | int w;
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261 | |||
262 | for (w = w_start; w > w_end; w--) {
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263 | 25a2ee7d | Philip Gladstone | unsigned int r,g,b; |
264 | 26b4bb70 | Philip Gladstone | HSV hsv; |
265 | 25a2ee7d | Philip Gladstone | int cb, cr, yt, r_add, g_add, b_add;
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266 | 26b4bb70 | Philip Gladstone | |
267 | 25a2ee7d | Philip Gladstone | YUV_TO_RGB1_CCIR(u[0], v[0]); |
268 | YUV_TO_RGB2_CCIR(r, g, b, y[0]);
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269 | 26b4bb70 | Philip Gladstone | |
270 | get_hsv(&hsv, r, g, b); |
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271 | |||
272 | 115329f1 | Diego Biurrun | if (ci->debug > 1) |
273 | 26b4bb70 | Philip Gladstone | 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 | |||
276 | |||
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 | 115329f1 | Diego Biurrun | hsv.v >= ci->dark.v && hsv.v <= ci->bright.v) { |
280 | 26b4bb70 | Philip Gladstone | inrange++; |
281 | } else if (ci->zapping) { |
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282 | 25a2ee7d | Philip Gladstone | y[0] = y[1] = y[rowsize] = y[rowsize + 1] = 16; |
283 | u[0] = 128; |
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284 | v[0] = 128; |
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285 | 26b4bb70 | Philip Gladstone | } |
286 | |||
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 | |||
292 | d9974a48 | Philip Gladstone | y += picture->linesize[0] * 2 - (w_start - w_end) * 2; |
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 | 26b4bb70 | Philip Gladstone | } |
296 | |||
297 | 115329f1 | Diego Biurrun | if (ci->debug)
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298 | d9974a48 | Philip Gladstone | fprintf(stderr, "Fish: Inrange=%d of %d = %d threshold\n", inrange, pixcnt, 1000 * inrange / pixcnt); |
299 | |||
300 | 26b4bb70 | Philip Gladstone | if (inrange * 1000 / pixcnt >= ci->threshold) { |
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 | |||
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 | |||
312 | foundfile = 0;
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313 | |||
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 | |||
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 | |||
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 | |||
333 | avpicture_fill(&picture1, buf, PIX_FMT_RGB24, width, height); |
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334 | 115329f1 | Diego Biurrun | if (img_convert(&picture1, PIX_FMT_RGB24,
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335 | 26b4bb70 | Philip Gladstone | picture, pix_fmt, width, height) >= 0) {
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336 | /* Write out the PPM file */
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337 | |||
338 | FILE *f; |
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339 | char fname[256]; |
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340 | |||
341 | 4733abcb | Måns Rullgård | snprintf(fname, sizeof(fname), "%s/fishimg%ld_%"PRId64".ppm", ci->dir, (long)(av_gettime() / 1000000), pts); |
342 | 26b4bb70 | Philip Gladstone | 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 | |||
350 | av_free(buf); |
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351 | 115329f1 | Diego Biurrun | ci->next_pts = pts + ci->min_interval; |
352 | 26b4bb70 | Philip Gladstone | } |
353 | } |
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354 | } |
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355 | } |