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
  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                 written = 0;
  46                 do {
  47                         if ((i = write(out, buffer, bytes-written)) < 0) {
  48                                 perror("write");
  49                                 exit(EXIT_FAILURE);
  50                         }
  51                         written += i;
  52                 } while(written < bytes);
  53
  54                 gettimeofday(&curr, NULL);
  55         } while (curr.tv_sec < start.tv_sec+duration);
  56
  57         close(out);
  58         close(in);
  59         shutdown(in, SHUT_RDWR);
  60 }
  61
  62 int main(int argc, char **argv)
  63 {
  64         int duration;
  65         char *url;
  66         char *outfile;
  67         int(*open_fn)(char *);
  68
  69         if (argc == 4) {
  70                 url = argv[1];
  71                 duration = atol(argv[2])*60;
  72                 outfile = argv[3];
  73         } else {
  74                 fprintf(stderr,"Syntax: %s URL duration_in_minutes outfile\n", argv[0]);
  75                 exit(EXIT_FAILURE);
  76         }
  77
  78         if (is_http(url)) {
  79                 open_fn = &open_http;
  80         } else if (is_mcast(url)) {
  81                 open_fn = &open_mcast;
  82         } else {
  83                 printf("URL %s not supported!\n", url);
  84                 exit(EXIT_FAILURE);
  85         }
  86
  87         record(open_fn, url, outfile, duration);
  88
  89         return EXIT_SUCCESS;
  90 }