recv.c

   1 /*
   2  * Copyright (C) 2005-2011 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 #include <dirent.h>
  12 #include <stdbool.h>
  13
  14 #include "para.h"
  15 #include "list.h"
  16 #include "sched.h"
  17 #include "ggo.h"
  18 #include "recv.h"
  19 #include "recv.cmdline.h"
  20 #include "fd.h"
  21 #include "string.h"
  22 #include "error.h"
  23 #include "stdout.h"
  24 #include "buffer_tree.h"
  25
  26 /** The gengetopt args info struct. */
  27 static struct recv_args_info conf;
  28
  29 static int loglevel;
  30 /** Always log to stderr. */
  31 INIT_STDERR_LOGGING(loglevel);
  32
  33 /** init array of error codes used by para_recv */
  34 INIT_RECV_ERRLISTS;
  35
  36 __noreturn static void print_help_and_die(void)
  37 {
  38         int d = conf.detailed_help_given;
  39         const char **p = d? recv_args_info_detailed_help
  40                 : recv_args_info_help;
  41
  42         printf_or_die("%s\n\n", RECV_CMDLINE_PARSER_PACKAGE "-"
  43                 RECV_CMDLINE_PARSER_VERSION);
  44         printf_or_die("%s\n\n", recv_args_info_usage);
  45         for (; *p; p++)
  46                 printf_or_die("%s\n", *p);
  47         print_receiver_helps(d);
  48         exit(0);
  49 }
  50
  51 static void *parse_config(int argc, char *argv[], int *receiver_num)
  52 {
  53         if (recv_cmdline_parser(argc, argv, &conf))
  54                 return NULL;
  55         HANDLE_VERSION_FLAG("recv", conf);
  56         if (conf.help_given || conf.detailed_help_given)
  57                 print_help_and_die();
  58         loglevel = get_loglevel_by_name(conf.loglevel_arg);
  59         return check_receiver_arg(conf.receiver_arg, receiver_num);
  60 }
  61
  62 /**
  63  * The main function of para_recv.
  64  *
  65  * \param argc number of arguments
  66  * \param argv vector of arguments
  67  *
  68  * para_recv uses the specified receiver to receive an audio stream sent by
  69  * para_server. The received data is written to stdout.
  70  *
  71  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  72  */
  73 int main(int argc, char *argv[])
  74 {
  75         int ret, r_opened = 0, receiver_num;
  76         struct receiver *r = NULL;
  77         struct receiver_node rn;
  78         struct stdout_task sot;
  79         static struct sched s;
  80
  81         s.default_timeout.tv_sec = 1;
  82         s.default_timeout.tv_usec = 0;
  83
  84         memset(&sot, 0, sizeof(struct stdout_task));
  85         memset(&rn, 0, sizeof(struct receiver_node));
  86         recv_init();
  87         ret = -E_RECV_SYNTAX;
  88         rn.conf = parse_config(argc, argv, &receiver_num);
  89         if (!rn.conf) {
  90                 PARA_EMERG_LOG("parse failed\n");
  91                 goto out;
  92         }
  93         r = &receivers[receiver_num];
  94         rn.receiver = r;
  95         rn.btrn = btr_new_node(&(struct btr_node_description)
  96                 EMBRACE(.name = r->name));
  97         ret = r->open(&rn);
  98         if (ret < 0)
  99                 goto out;
 100         r_opened = 1;
 101
 102         sot.btrn = btr_new_node(&(struct btr_node_description)
 103                 EMBRACE(.parent = rn.btrn, .name = "stdout"));
 104         stdout_set_defaults(&sot);
 105         register_task(&sot.task);
 106
 107         rn.task.pre_select = r->pre_select;
 108         rn.task.post_select = r->post_select;
 109         sprintf(rn.task.status, "%s", r->name);
 110         register_task(&rn.task);
 111
 112         ret = schedule(&s);
 113 out:
 114         if (r_opened)
 115                 r->close(&rn);
 116         btr_free_node(rn.btrn);
 117         btr_free_node(sot.btrn);
 118         if (rn.conf)
 119                 r->free_config(rn.conf);
 120         if (ret < 0)
 121                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 122         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 123 }