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 3000
  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, recvd, written, count = 0;
  23         char buffer[CHUNKSIZE];
  24         int in, out;
  25
  26         if ((in = (*open_fn)(url)) < 0) {
  27                 fprintf(stderr,"Can't open url %s!\n",url);
  28                 exit(EXIT_FAILURE);
  29         }
  30
  31         if ((out = open(outfile, O_CREAT|O_TRUNC|O_WRONLY|O_LARGEFILE, 00644)) < 0) {
  32                 perror("open");
  33                 exit(EXIT_FAILURE);
  34         }
  35
  36         printf("Recording from %s for %d seconds...\n", url, duration);
  37
  38         gettimeofday(&start, NULL);
  39         curr = start;
  40
  41         do {
  42                 if ((recvd = recv(in, buffer, CHUNKSIZE, 0)) < 1) {
  43                         /* TODO: Insert better connection-loss recovery here */
  44                         if ((in = (*open_fn)(url)) < 0) {
  45                                 sleep(1);
  46                                 continue;
  47                         }
  48                 }
  49                 written = 0;
  50                 do {
  51                         if ((bytes = write(out, buffer, recvd-written)) < 0) {
  52                                 perror("write");
  53                                 exit(EXIT_FAILURE);
  54                         }
  55                         written += bytes;
  56                 } while(written < recvd);
  57
  58                 if (!(++count % GTOD_INTERVAL))
  59                         gettimeofday(&curr, NULL);
  60         } while (curr.tv_sec < start.tv_sec+duration);
  61
  62         close(out);
  63         close(in);
  64         shutdown(in, SHUT_RDWR);
  65 }
  66
  67 int main(int argc, char **argv)
  68 {
  69         int duration;
  70         char *url;
  71         char *outfile;
  72         int(*open_fn)(char *);
  73
  74         if (argc == 4) {
  75                 url = argv[1];
  76                 duration = atoi(argv[2])*60;
  77                 outfile = argv[3];
  78         } else {
  79                 fprintf(stderr,"Syntax: %s URL duration_in_minutes outfile\n", argv[0]);
  80                 exit(EXIT_FAILURE);
  81         }
  82
  83         if (is_http(url)) {
  84                 open_fn = &open_http;
  85         } else if (is_mcast(url)) {
  86                 open_fn = &open_mcast;
  87         } else {
  88                 printf("URL %s not supported!\n", url);
  89                 exit(EXIT_FAILURE);
  90         }
  91
  92         record(open_fn, url, outfile, duration);
  93
  94         return EXIT_SUCCESS;
  95 }