recv.c

   1 /*
   2  * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file recv.c the stand-alone audio stream receiver */
   8
   9 #include <sys/types.h>
  10 #include <dirent.h>
  11
  12 #include "para.h"
  13 #include "list.h"
  14 #include "sched.h"
  15 #include "recv.h"
  16 #include "recv.cmdline.h"
  17 #include "fd.h"
  18 #include "error.h"
  19 #include "stdout.h"
  20
  21 /** the gengetopt args info struct */
  22 struct recv_args_info conf;
  23
  24 /** always log to stderr */
  25 INIT_STDERR_LOGGING(conf.loglevel_arg);
  26
  27 /** init array of error codes used by para_recv */
  28 INIT_RECV_ERRLISTS;
  29
  30 static void *parse_config(int argc, char *argv[], int *receiver_num)
  31 {
  32         int i;
  33
  34         if (recv_cmdline_parser(argc, argv, &conf))
  35                 return NULL;
  36         HANDLE_VERSION_FLAG("recv", conf);
  37         if (conf.list_receivers_given) {
  38                 printf("available receivers: ");
  39                 for (i = 0; receivers[i].name; i++)
  40                         printf("%s%s", i? " " : "", receivers[i].name);
  41                 printf("\nTry\n\tpara_recv -r '<receivername> -h'\n"
  42                         "for help on <receivername>.\n");
  43                 exit(EXIT_SUCCESS);
  44         }
  45         return check_receiver_arg(conf.receiver_arg, receiver_num);
  46 }
  47
  48 static void rn_event_handler(struct task *t)
  49 {
  50         struct receiver_node *rn = t->private_data;
  51         PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
  52         rn->eof = 1;
  53         unregister_task(t);
  54 }
  55
  56 /**
  57  * the main function of para_recv
  58  *
  59  * \param argc number of arguments
  60  * \param argv vector of arguments
  61  *
  62  * para_recv uses the specified receiver to receive an audio stream sent by
  63  * para_server. The received data is written to stdout.
  64  *
  65  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  66  */
  67 int main(int argc, char *argv[])
  68 {
  69         int ret, r_opened = 0, receiver_num;
  70         struct receiver *r = NULL;
  71         struct receiver_node rn;
  72         struct stdout_task sot;
  73         struct sched s;
  74
  75         s.default_timeout.tv_sec = 1;
  76         s.default_timeout.tv_usec = 0;
  77
  78         memset(&rn, 0, sizeof(struct receiver_node));
  79         for (ret = 0; receivers[ret].name; ret++)
  80                 receivers[ret].init(&receivers[ret]);
  81         ret = -E_RECV_SYNTAX;
  82         rn.conf = parse_config(argc, argv, &receiver_num);
  83         if (!rn.conf) {
  84                 PARA_EMERG_LOG("%s", "parse failed\n");
  85                 goto out;
  86         }
  87         r = &receivers[receiver_num];
  88         rn.receiver = r;
  89         ret = r->open(&rn);
  90         if (ret < 0)
  91                 goto out;
  92         r_opened = 1;
  93
  94         stdout_set_defaults(&sot);
  95         sot.buf = rn.buf;
  96         sot.loaded = &rn.loaded;
  97         sot.input_eof = &rn.eof;
  98         register_task(&sot.task);
  99
 100         rn.task.private_data = &rn;
 101         rn.task.pre_select = r->pre_select;
 102         rn.task.post_select = r->post_select;
 103         rn.task.event_handler = rn_event_handler;
 104         sprintf(rn.task.status, "receiver node");
 105         register_task(&rn.task);
 106
 107         ret = sched(&s);
 108 out:
 109         if (r_opened)
 110                 r->close(&rn);
 111         if (r)
 112                 r->shutdown();
 113         if (ret < 0)
 114                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
 115         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 116 }