implement (probably working) multicast
[record-dvb] / 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 if ((in = (*open_fn)(url)) < 0)
44 sleep(1);
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 }
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