git.zerfleddert.de Git - record-dvb/blob - record-dvb.c

   1 #include <features.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <sys/time.h>
   5 #include <time.h>
   6 #include <sys/socket.h>
   7 #include <sys/types.h>
   8 #include <sys/stat.h>
   9 #include <fcntl.h>
  10 #include <unistd.h>
  11 #include <strings.h>
  12
  13 #include "http.h"
  14 #include "mcast.h"
  15
  16 #define CHUNKSIZE 1500
  17 #define GTOD_INTERVAL 100
  18
  19 void record(int(*open_fn)(char *), char *url, char *outfile, int duration)
  20 {
  21         struct timeval start, curr;
  22         int bytes, written, count = 0;
  23         char buffer[CHUNKSIZE];
  24         int i;
  25         int in, out;
  26
  27         if ((out = open(outfile, O_CREAT|O_TRUNC|O_WRONLY|O_LARGEFILE, 00644)) < 0) {
  28                 perror("open");
  29                 exit(EXIT_FAILURE);
  30         }
  31
  32         if ((in = (*open_fn)(url)) < 0) {
  33                 fprintf(stderr,"Can't open url %s!\n",url);
  34                 exit(EXIT_FAILURE);
  35         }
  36
  37         printf("Recording from %s for %d seconds...\n", url, duration);
  38
  39         gettimeofday(&start, NULL);
  40         curr = start;
  41
  42         do {
  43                 if ((bytes = recv(in, buffer, CHUNKSIZE, 0)) < 1) {
  44                         /* TODO: Insert better connection-loss recovery here */
  45                         if ((in = (*open_fn)(url)) < 0) {
  46                                 sleep(1);
  47                                 continue;
  48                         }
  49                 }
  50                 written = 0;
  51                 do {
  52                         if ((i = write(out, buffer, bytes-written)) < 0) {
  53                                 perror("write");
  54                                 exit(EXIT_FAILURE);
  55                         }
  56                         written += i;
  57                 } while(written < bytes);
  58
  59                 count++;
  60
  61                 if (!(count % GTOD_INTERVAL))
  62                         gettimeofday(&curr, NULL);
  63         } while (curr.tv_sec < start.tv_sec+duration);
  64
  65         close(out);
  66         close(in);
  67         shutdown(in, SHUT_RDWR);
  68 }
  69
  70 int main(int argc, char **argv)
  71 {
  72         int duration;
  73         char *url;
  74         char *outfile;
  75         int(*open_fn)(char *);
  76
  77         if (argc == 4) {
  78                 url = argv[1];
  79                 duration = atoi(argv[2])*60;
  80                 outfile = argv[3];
  81         } else {
  82                 fprintf(stderr,"Syntax: %s URL duration_in_minutes outfile\n", argv[0]);
  83                 exit(EXIT_FAILURE);
  84         }
  85
  86         if (is_http(url)) {
  87                 open_fn = &open_http;
  88         } else if (is_mcast(url)) {
  89                 open_fn = &open_mcast;
  90         } else {
  91                 printf("URL %s not supported!\n", url);
  92                 exit(EXIT_FAILURE);
  93         }
  94
  95         record(open_fn, url, outfile, duration);
  96
  97         return EXIT_SUCCESS;
  98 }