recv.c

   1 /*
   2  * Copyright (C) 2005-2012 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 <regex.h>
  10 #include <sys/types.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 #include "buffer_tree.h"
  23 #include "version.h"
  24
  25 /** The gengetopt args info struct. */
  26 static struct recv_args_info conf;
  27
  28 static int loglevel;
  29 /** Always log to stderr. */
  30 INIT_STDERR_LOGGING(loglevel);
  31
  32 /** init array of error codes used by para_recv */
  33 INIT_RECV_ERRLISTS;
  34
  35 __noreturn static void print_help_and_die(void)
  36 {
  37         int d = conf.detailed_help_given;
  38         const char **p = d? recv_args_info_detailed_help
  39                 : recv_args_info_help;
  40
  41         printf_or_die("%s\n\n", RECV_CMDLINE_PARSER_PACKAGE "-"
  42                 RECV_CMDLINE_PARSER_VERSION);
  43         printf_or_die("%s\n\n", recv_args_info_usage);
  44         for (; *p; p++)
  45                 printf_or_die("%s\n", *p);
  46         print_receiver_helps(d);
  47         exit(0);
  48 }
  49
  50 static void *parse_config(int argc, char *argv[], int *receiver_num)
  51 {
  52         if (recv_cmdline_parser(argc, argv, &conf))
  53                 return NULL;
  54         HANDLE_VERSION_FLAG("recv", conf);
  55         if (conf.help_given || conf.detailed_help_given)
  56                 print_help_and_die();
  57         loglevel = get_loglevel_by_name(conf.loglevel_arg);
  58         return check_receiver_arg(conf.receiver_arg, receiver_num);
  59 }
  60
  61 /**
  62  * The main function of para_recv.
  63  *
  64  * \param argc number of arguments
  65  * \param argv vector of arguments
  66  *
  67  * para_recv uses the specified receiver to receive an audio stream sent by
  68  * para_server. The received data is written to stdout.
  69  *
  70  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  71  */
  72 int main(int argc, char *argv[])
  73 {
  74         int ret, r_opened = 0, receiver_num;
  75         struct receiver *r = NULL;
  76         struct receiver_node rn;
  77         struct stdout_task sot;
  78         static struct sched s;
  79
  80         s.default_timeout.tv_sec = 1;
  81         s.default_timeout.tv_usec = 0;
  82
  83         memset(&sot, 0, sizeof(struct stdout_task));
  84         memset(&rn, 0, sizeof(struct receiver_node));
  85         recv_init();
  86         ret = -E_RECV_SYNTAX;
  87         rn.conf = parse_config(argc, argv, &receiver_num);
  88         if (!rn.conf) {
  89                 PARA_EMERG_LOG("parse failed\n");
  90                 goto out;
  91         }
  92         r = &receivers[receiver_num];
  93         rn.receiver = r;
  94         rn.btrn = btr_new_node(&(struct btr_node_description)
  95                 EMBRACE(.name = r->name));
  96         ret = r->open(&rn);
  97         if (ret < 0)
  98                 goto out;
  99         r_opened = 1;
 100
 101         sot.btrn = btr_new_node(&(struct btr_node_description)
 102                 EMBRACE(.parent = rn.btrn, .name = "stdout"));
 103         stdout_set_defaults(&sot);
 104         register_task(&s, &sot.task);
 105
 106         rn.task.pre_select = r->pre_select;
 107         rn.task.post_select = r->post_select;
 108         sprintf(rn.task.status, "%s", r->name);
 109         register_task(&s, &rn.task);
 110
 111         ret = schedule(&s);
 112 out:
 113         if (r_opened)
 114                 r->close(&rn);
 115         btr_free_node(rn.btrn);
 116         btr_free_node(sot.btrn);
 117         if (rn.conf)
 118                 r->free_config(rn.conf);
 119         if (ret < 0)
 120                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 121         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 122 }