recv.c

   1 /*
   2  * Copyright (C) 2005-2007 Andre Noll <maan@systemlinux.org>
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     This program is distributed in the hope that it will be useful,
  10  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *     GNU General Public License for more details.
  13  *
  14  *     You should have received a copy of the GNU General Public License
  15  *     along with this program; if not, write to the Free Software
  16  *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  17  */
  18
  19 /** \file recv.c the stand-alone audio stream receiver */
  20
  21 #include "para.h"
  22
  23 #include "list.h"
  24 #include "sched.h"
  25 #include "recv.h"
  26 #include "recv.cmdline.h"
  27 #include "fd.h"
  28 #include "error.h"
  29 #include "stdout.h"
  30
  31 /** the gengetopt args info struct */
  32 struct recv_args_info conf;
  33
  34 /** always log to stderr */
  35 INIT_STDERR_LOGGING(conf.loglevel_arg);
  36
  37 /** init array of error codes used by para_recv */
  38 INIT_RECV_ERRLISTS;
  39
  40 static void *parse_config(int argc, char *argv[], int *receiver_num)
  41 {
  42         int i;
  43
  44         if (recv_cmdline_parser(argc, argv, &conf))
  45                 return NULL;
  46         HANDLE_VERSION_FLAG("recv", conf);
  47         if (conf.list_receivers_given) {
  48                 printf("available receivers: ");
  49                 for (i = 0; receivers[i].name; i++)
  50                         printf("%s%s", i? " " : "", receivers[i].name);
  51                 printf("\nTry\n\tpara_recv -r '<receivername> -h'\n"
  52                         "for help on <receivername>.\n");
  53                 exit(EXIT_SUCCESS);
  54         }
  55         return check_receiver_arg(conf.receiver_arg, receiver_num);
  56 }
  57
  58 static void rn_event_handler(struct task *t)
  59 {
  60         struct receiver_node *rn = t->private_data;
  61         PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t->ret));
  62         rn->eof = 1;
  63         unregister_task(t);
  64 }
  65
  66 /**
  67  * the main function of para_recv
  68  *
  69  * \param argc number of arguments
  70  * \param argv vector of arguments
  71  *
  72  * para_recv uses the specified receiver to receive an audio stream sent by
  73  * para_server. The received data is written to stdout.
  74  *
  75  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  76  */
  77 int main(int argc, char *argv[])
  78 {
  79         int ret, r_opened = 0, receiver_num;
  80         struct receiver *r = NULL;
  81         struct receiver_node rn;
  82         struct stdout_task sot;
  83         struct sched s;
  84
  85         s.default_timeout.tv_sec = 1;
  86         s.default_timeout.tv_usec = 0;
  87
  88         memset(&rn, 0, sizeof(struct receiver_node));
  89         for (ret = 0; receivers[ret].name; ret++)
  90                 receivers[ret].init(&receivers[ret]);
  91         ret = -E_RECV_SYNTAX;
  92         rn.conf = parse_config(argc, argv, &receiver_num);
  93         if (!rn.conf) {
  94                 PARA_EMERG_LOG("%s", "parse failed\n");
  95                 goto out;
  96         }
  97         r = &receivers[receiver_num];
  98         rn.receiver = r;
  99         ret = r->open(&rn);
 100         if (ret < 0)
 101                 goto out;
 102         r_opened = 1;
 103
 104         stdout_set_defaults(&sot);
 105         sot.buf = rn.buf;
 106         sot.loaded = &rn.loaded;
 107         sot.input_eof = &rn.eof;
 108         register_task(&sot.task);
 109
 110         rn.task.private_data = &rn;
 111         rn.task.pre_select = r->pre_select;
 112         rn.task.post_select = r->post_select;
 113         rn.task.event_handler = rn_event_handler;
 114         sprintf(rn.task.status, "receiver node");
 115         register_task(&rn.task);
 116
 117         ret = sched(&s);
 118 out:
 119         if (r_opened)
 120                 r->close(&rn);
 121         if (r)
 122                 r->shutdown();
 123         if (ret < 0)
 124                 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
 125         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 126 }