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 8192
  17
  18 void record(int(*open_fn)(char *), char *url, char *outfile, int duration)
  19 {
  20         struct timeval start, curr;
  21         int bytes, written;
  22         char buffer[CHUNKSIZE];
  23         int i;
  24         int in, out;
  25
  26         if ((out = open(outfile, O_CREAT|O_TRUNC|O_WRONLY|O_LARGEFILE, 00644)) < 0) {
  27                 perror("open");
  28                 exit(EXIT_FAILURE);
  29         }
  30
  31         if ((in = (*open_fn)(url)) < 0) {
  32                 fprintf(stderr,"Can't open url %s!\n",url);
  33                 exit(EXIT_FAILURE);
  34         }
  35
  36         printf("Recording from %s for %d seconds...\n", url, duration);
  37
  38         gettimeofday(&start, NULL);
  39
  40         do {
  41                 if ((bytes = recv(in, buffer, CHUNKSIZE, 0)) < 1) {
  42                         /* TODO: Insert better connection-loss recovery here */
  43                         in = (*open_fn)(url);
  44                 }
  45
  46                 written = 0;
  47                 do {
  48                         if ((i = write(out, buffer, bytes-written)) < 0) {
  49                                 perror("write");
  50                                 exit(EXIT_FAILURE);
  51                         }
  52                         written += i;
  53                 } while(written < bytes);
  54
  55                 gettimeofday(&curr, NULL);
  56         } while (curr.tv_sec < start.tv_sec+duration);
  57
  58         close(out);
  59         close(in);
  60         shutdown(in, SHUT_RDWR);
  61 }
  62
  63 int main(int argc, char **argv)
  64 {
  65         int duration;
  66         char *url;
  67         char *outfile;
  68         int(*open_fn)(char *);
  69
  70         if (argc == 4) {
  71                 url = argv[1];
  72                 duration = atol(argv[2])*60;
  73                 outfile = argv[3];
  74         } else {
  75                 fprintf(stderr,"Syntax: %s URL duration_in_minutes outfile\n", argv[0]);
  76                 exit(EXIT_FAILURE);
  77         }
  78
  79         if (is_http(url)) {
  80                 open_fn = &open_http;
  81         } else if (is_mcast(url)) {
  82                 open_fn = &open_mcast;
  83         } else {
  84                 printf("URL %s not supported!\n", url);
  85                 exit(EXIT_FAILURE);
  86         }
  87
  88         record(open_fn, url, outfile, duration);
  89
  90         return EXIT_SUCCESS;
  91 }