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 "string.h"
  20 #include "error.h"
  21 #include "stdout.h"
  22
  23 /** the gengetopt args info struct */
  24 struct recv_args_info conf;
  25
  26 static int loglevel;
  27 /** Always log to stderr. */
  28 INIT_STDERR_LOGGING(loglevel);
  29
  30 /** init array of error codes used by para_recv */
  31 INIT_RECV_ERRLISTS;
  32
  33 __noreturn static void print_help_and_die(void)
  34 {
  35         int d = conf.detailed_help_given;
  36         const char **p = d? recv_args_info_detailed_help
  37                 : recv_args_info_help;
  38
  39         printf_or_die("%s\n\n", RECV_CMDLINE_PARSER_PACKAGE "-"
  40                 RECV_CMDLINE_PARSER_VERSION);
  41         printf_or_die("%s\n\n", recv_args_info_usage);
  42         for (; *p; p++)
  43                 printf_or_die("%s\n", *p);
  44         print_receiver_helps(d);
  45         exit(0);
  46 }
  47
  48 static void *parse_config(int argc, char *argv[], int *receiver_num)
  49 {
  50         if (recv_cmdline_parser(argc, argv, &conf))
  51                 return NULL;
  52         HANDLE_VERSION_FLAG("recv", conf);
  53         if (conf.help_given || conf.detailed_help_given)
  54                 print_help_and_die();
  55         return check_receiver_arg(conf.receiver_arg, receiver_num);
  56 }
  57
  58 /**
  59  * the main function of para_recv
  60  *
  61  * \param argc number of arguments
  62  * \param argv vector of arguments
  63  *
  64  * para_recv uses the specified receiver to receive an audio stream sent by
  65  * para_server. The received data is written to stdout.
  66  *
  67  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  68  */
  69 int main(int argc, char *argv[])
  70 {
  71         int ret, r_opened = 0, receiver_num;
  72         struct receiver *r = NULL;
  73         struct receiver_node rn;
  74         struct stdout_task sot;
  75         static struct sched s;
  76
  77         s.default_timeout.tv_sec = 1;
  78         s.default_timeout.tv_usec = 0;
  79
  80         memset(&sot, 0, sizeof(struct stdout_task));
  81         memset(&rn, 0, sizeof(struct receiver_node));
  82         FOR_EACH_RECEIVER(ret)
  83                 receivers[ret].init(&receivers[ret]);
  84         ret = -E_RECV_SYNTAX;
  85         rn.conf = parse_config(argc, argv, &receiver_num);
  86         if (!rn.conf) {
  87                 PARA_EMERG_LOG("parse failed\n");
  88                 goto out;
  89         }
  90         loglevel = get_loglevel_by_name(conf.loglevel_arg);
  91         r = &receivers[receiver_num];
  92         rn.receiver = r;
  93         ret = r->open(&rn);
  94         if (ret < 0)
  95                 goto out;
  96         r_opened = 1;
  97
  98         stdout_set_defaults(&sot);
  99         sot.buf = rn.buf;
 100         sot.loaded = &rn.loaded;
 101         sot.input_error = &rn.task.error;
 102         register_task(&sot.task);
 103
 104         rn.task.pre_select = r->pre_select;
 105         rn.task.post_select = r->post_select;
 106         sprintf(rn.task.status, "receiver node");
 107         register_task(&rn.task);
 108
 109         ret = schedule(&s);
 110 out:
 111         if (r_opened)
 112                 r->close(&rn);
 113         if (r)
 114                 r->shutdown();
 115         if (ret < 0)
 116                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 117         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 118 }