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#define _XOPEN_SOURCE 500
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <inttypes.h>
#include <unistd.h>
#include "video_decode.h"
#include "util.h"
static void
usage(void)
{
fprintf(stderr, "overlap [-dh] [-t DURATION] FIRST_VIDEO SECOND_VIDEO\n"
"\n"
"OPTIONS\n"
"\t-d\tprint diff for every frame\n"
"\t-h\tprint this help message\n"
"\t-t\tmax duration to find overlap in milliseconds\n"
"\t\t(default 60000 = 1 min)\n");
exit(EXIT_FAILURE);
}
int
main(int argc, char **argv)
{
struct video_decode *first_vd;
struct video_decode *second_vd;
struct video_frame *cur_frame = NULL, *last_frame = NULL;
int ret, ch;
int diff_flag = 0;
int64_t timestamp = 0;
int64_t duration = 60 * 1000; /* duration for searching min_diff */
/* default 1 min = 60 sec * 1000 msec */
int64_t min_diff_time = 0; /* dts at overlaping frame */
double min_diff, diff = 0.0;
while ((ch = getopt(argc, argv, "dth")) != -1) {
switch (ch) {
case 'd':
diff_flag = 1; /* print diff of every frame */
break;
case 't':
duration = strtol(optarg, NULL, 10);
break;
case 'h':
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
if (argc < 2)
usage();
ret = video_decode_init(&first_vd, argv[0], timestamp);
if (ret < 0)
return -ret;
/* just get last frame of move */
video_decode_seek(first_vd, first_vd->duration);
for (int i = 0; video_decode_get_frame(first_vd, &last_frame) > 0; ++i);
ret = video_decode_init(&second_vd, argv[1], timestamp);
if (ret < 0)
return -ret;
for (int i = 0; video_decode_get_frame(second_vd, &cur_frame) > 0; ++i){
diff = frame_diff(last_frame, cur_frame);
if (i == 0 || diff <= min_diff) {
min_diff = diff;
min_diff_time = cur_frame->dts;
}
if (diff_flag)
printf("%" PRId64 " %f\n", cur_frame->dts, diff);
if (cur_frame->dts > duration)
break;
}
if (!diff_flag) {
print_time(min_diff_time);
printf("\n");
}
video_decode_free_frame(&cur_frame);
video_decode_free_frame(&last_frame);
video_decode_uninit(&first_vd);
video_decode_uninit(&second_vd);
return EXIT_SUCCESS;
}
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