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