mirror of https://git.ffmpeg.org/ffmpeg.git
331 lines
9.4 KiB
C
331 lines
9.4 KiB
C
/*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include <stdlib.h>
|
|
#include <fcntl.h>
|
|
#include <getopt.h>
|
|
#include <stdarg.h>
|
|
#include <string.h>
|
|
#include <sys/time.h>
|
|
#include <stdio.h>
|
|
#include <dirent.h>
|
|
|
|
#include "framehook.h"
|
|
#include "dsputil.h"
|
|
|
|
#define SCALE_BITS 10
|
|
|
|
#define C_Y (76309 >> (16 - SCALE_BITS))
|
|
#define C_RV (117504 >> (16 - SCALE_BITS))
|
|
#define C_BU (138453 >> (16 - SCALE_BITS))
|
|
#define C_GU (13954 >> (16 - SCALE_BITS))
|
|
#define C_GV (34903 >> (16 - SCALE_BITS))
|
|
|
|
|
|
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 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;
|
|
}
|
|
|
|
|
|
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 = 1000;
|
|
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;
|
|
break;
|
|
case 'w':
|
|
ci->min_width = atoi(optarg);
|
|
break;
|
|
case 'd':
|
|
ci->debug++;
|
|
break;
|
|
case 'D':
|
|
ci->dir = 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);
|
|
|
|
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 pts)
|
|
{
|
|
ContextInfo *ci = (ContextInfo *) ctx;
|
|
UINT8 *cm = cropTbl + MAX_NEG_CROP;
|
|
int rowsize = picture->linesize[0];
|
|
|
|
if (pts < ci->next_pts)
|
|
return;
|
|
|
|
if (width < ci->min_width)
|
|
return;
|
|
|
|
ci->next_pts = pts + 1000000;
|
|
|
|
if (pix_fmt == PIX_FMT_YUV420P) {
|
|
UINT8 *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];
|
|
u = picture->data[1];
|
|
v = picture->data[2];
|
|
|
|
for (h = h_start; h > h_end; h -= 2) {
|
|
int w;
|
|
|
|
for (w = w_start; w > w_end; w--) {
|
|
int r,g,b;
|
|
int Y, U, V;
|
|
HSV hsv;
|
|
|
|
U = u[0] - 128;
|
|
V = v[0] - 128;
|
|
|
|
Y = (y[0] - 16) * C_Y;
|
|
|
|
r = cm[(Y + C_RV * V + (1 << (SCALE_BITS - 1))) >> SCALE_BITS];
|
|
g = cm[(Y + - C_GU * U - C_GV * V + (1 << (SCALE_BITS - 1))) >> SCALE_BITS];
|
|
b = cm[(Y + C_BU * U + (1 << (SCALE_BITS - 1))) >> SCALE_BITS];
|
|
|
|
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] = 0;
|
|
}
|
|
|
|
y+= 2;
|
|
u++;
|
|
v++;
|
|
}
|
|
|
|
y += picture->linesize[0] * 2 - width;
|
|
u += picture->linesize[1] - width2;
|
|
v += picture->linesize[2] - width2;
|
|
}
|
|
|
|
if (inrange * 1000 / pixcnt >= ci->threshold) {
|
|
/* Save to file */
|
|
int size;
|
|
char *buf;
|
|
AVPicture picture1;
|
|
static int frame_counter;
|
|
static int foundfile;
|
|
|
|
if (ci->debug)
|
|
fprintf(stderr, "Fish: Inrange=%d of %d = %d threshold\n", inrange, pixcnt, 1000 * inrange / pixcnt);
|
|
|
|
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];
|
|
|
|
sprintf(fname, "%s/fishimg%ld_%lld.ppm", ci->dir, time(0), 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;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* To ensure correct typing */
|
|
FrameHookConfigureFn ConfigureFn = Configure;
|
|
FrameHookProcessFn ProcessFn = Process;
|