recv.c

   1 /*
   2  * Copyright (C) 2005-2009 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 "ggo.h"
  16 #include "recv.h"
  17 #include "recv.cmdline.h"
  18 #include "fd.h"
  19 #include "error.h"
  20 #include "stdout.h"
  21
  22 /** the gengetopt args info struct */
  23 struct recv_args_info conf;
  24
  25 /** always log to stderr */
  26 INIT_STDERR_LOGGING(conf.loglevel_arg);
  27
  28 /** init array of error codes used by para_recv */
  29 INIT_RECV_ERRLISTS;
  30
  31 __noreturn static void print_help_and_die(void)
  32 {
  33         int d = conf.detailed_help_given;
  34         const char **p = d? recv_args_info_detailed_help
  35                 : recv_args_info_help;
  36
  37         printf_or_die("%s\n\n", RECV_CMDLINE_PARSER_PACKAGE "-"
  38                 RECV_CMDLINE_PARSER_VERSION);
  39         printf_or_die("%s\n\n", recv_args_info_usage);
  40         for (; *p; p++)
  41                 printf_or_die("%s\n", *p);
  42         print_receiver_helps(d);
  43         exit(0);
  44 }
  45
  46 static void *parse_config(int argc, char *argv[], int *receiver_num)
  47 {
  48         if (recv_cmdline_parser(argc, argv, &conf))
  49                 return NULL;
  50         HANDLE_VERSION_FLAG("recv", conf);
  51         if (conf.help_given || conf.detailed_help_given)
  52                 print_help_and_die();
  53         return check_receiver_arg(conf.receiver_arg, receiver_num);
  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         static struct sched s;
  74
  75         s.default_timeout.tv_sec = 1;
  76         s.default_timeout.tv_usec = 0;
  77
  78         memset(&sot, 0, sizeof(struct stdout_task));
  79         memset(&rn, 0, sizeof(struct receiver_node));
  80         FOR_EACH_RECEIVER(ret)
  81                 receivers[ret].init(&receivers[ret]);
  82         ret = -E_RECV_SYNTAX;
  83         rn.conf = parse_config(argc, argv, &receiver_num);
  84         if (!rn.conf) {
  85                 PARA_EMERG_LOG("parse failed\n");
  86                 goto out;
  87         }
  88         r = &receivers[receiver_num];
  89         rn.receiver = r;
  90         ret = r->open(&rn);
  91         if (ret < 0)
  92                 goto out;
  93         r_opened = 1;
  94
  95         stdout_set_defaults(&sot);
  96         sot.buf = rn.buf;
  97         sot.loaded = &rn.loaded;
  98         sot.input_error = &rn.task.error;
  99         register_task(&sot.task);
 100
 101         rn.task.pre_select = r->pre_select;
 102         rn.task.post_select = r->post_select;
 103         sprintf(rn.task.status, "receiver node");
 104         register_task(&rn.task);
 105
 106         ret = schedule(&s);
 107 out:
 108         if (r_opened)
 109                 r->close(&rn);
 110         if (r)
 111                 r->shutdown();
 112         if (ret < 0)
 113                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 114         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 115 }