better reconnect-logic

[record-dvb] / record-dvb.c

diff --git a/record-dvb.c b/record-dvb.c
index a289874d160ee0c835e9d2aa420b4e8343e44ccc..38609a4996c27cf7caea23c89a8469e22c57fe00 100644 (file)
--- a/record-dvb.c
+++ b/record-dvb.c
@@ -13,48 +13,63 @@
 #include "http.h"
 #include "mcast.h"
 
-#define CHUNKSIZE 1500
+#define CHUNKSIZE 3000
+#define GTOD_INTERVAL 100
 
 void record(int(*open_fn)(char *), char *url, char *outfile, int duration)
 {
        struct timeval start, curr;
-       int bytes, written;
+       int bytes, recvd, written, count = 0;
+       int error_sleep = 0;
        char buffer[CHUNKSIZE];
-       int i;
        int in, out;
 
-       if ((out = open(outfile, O_CREAT|O_TRUNC|O_WRONLY|O_LARGEFILE, 00644)) < 0) {
-               perror("open");
+       if ((in = (*open_fn)(url)) < 0) {
+               fprintf(stderr,"Can't open url %s!\n",url);
                exit(EXIT_FAILURE);
        }
 
-       if ((in = (*open_fn)(url)) < 0) {
-               fprintf(stderr,"Can't open url %s!\n",url);
+       if ((out = open(outfile, O_CREAT|O_TRUNC|O_WRONLY|O_LARGEFILE, 00644)) < 0) {
+               perror("open");
                exit(EXIT_FAILURE);
        }
 
        printf("Recording from %s for %d seconds...\n", url, duration);
 
        gettimeofday(&start, NULL);
+       curr = start;
 
        do {
-               if ((bytes = recv(in, buffer, CHUNKSIZE, 0)) < 1) {
-                       /* TODO: Insert better connection-loss recovery here */
+               if (error_sleep) {
+                       sleep(error_sleep);
+                       printf("Reconnecting... ");
                        if ((in = (*open_fn)(url)) < 0) {
-                               sleep(1);
+                               if (error_sleep < 60)
+                                       error_sleep *= 2;
+
+                               printf("failed\n");
                                continue;
+                       } else {
+                               printf("succeeded\n");
+                               error_sleep = 0;
                        }
                }
+
+               if ((recvd = recv(in, buffer, CHUNKSIZE, 0)) < 1) {
+                       error_sleep = 1;
+                       continue;
+               }
                written = 0;
                do {
-                       if ((i = write(out, buffer, bytes-written)) < 0) {
+                       if ((bytes = write(out, buffer, recvd-written)) < 0) {
                                perror("write");
                                exit(EXIT_FAILURE);
                        }
-                       written += i;
-               } while(written < bytes);
+                       written += bytes;
+               } while(written < recvd);
 
-               gettimeofday(&curr, NULL);
+               if (!(++count % GTOD_INTERVAL))
+                       gettimeofday(&curr, NULL);
        } while (curr.tv_sec < start.tv_sec+duration);
 
        close(out);
@@ -71,7 +86,7 @@ int main(int argc, char **argv)
 
        if (argc == 4) {
                url = argv[1];
-               duration = atol(argv[2])*60;
+               duration = atoi(argv[2])*60;
                outfile = argv[3];
        } else {
                fprintf(stderr,"Syntax: %s URL duration_in_minutes outfile\n", argv[0]);