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 #include "version.h"
  26
  27 /** The gengetopt args info struct. */
  28 static struct recv_args_info conf;
  29
  30 static int loglevel;
  31 /** Always log to stderr. */
  32 INIT_STDERR_LOGGING(loglevel);
  33
  34 /** init array of error codes used by para_recv */
  35 INIT_RECV_ERRLISTS;
  36
  37 __noreturn static void print_help_and_die(void)
  38 {
  39         int d = conf.detailed_help_given;
  40         const char **p = d? recv_args_info_detailed_help
  41                 : recv_args_info_help;
  42
  43         printf_or_die("%s\n\n", RECV_CMDLINE_PARSER_PACKAGE "-"
  44                 RECV_CMDLINE_PARSER_VERSION);
  45         printf_or_die("%s\n\n", recv_args_info_usage);
  46         for (; *p; p++)
  47                 printf_or_die("%s\n", *p);
  48         print_receiver_helps(d);
  49         exit(0);
  50 }
  51
  52 static void *parse_config(int argc, char *argv[], int *receiver_num)
  53 {
  54         if (recv_cmdline_parser(argc, argv, &conf))
  55                 return NULL;
  56         HANDLE_VERSION_FLAG("recv", conf);
  57         if (conf.help_given || conf.detailed_help_given)
  58                 print_help_and_die();
  59         loglevel = get_loglevel_by_name(conf.loglevel_arg);
  60         return check_receiver_arg(conf.receiver_arg, receiver_num);
  61 }
  62
  63 /**
  64  * The main function of para_recv.
  65  *
  66  * \param argc number of arguments
  67  * \param argv vector of arguments
  68  *
  69  * para_recv uses the specified receiver to receive an audio stream sent by
  70  * para_server. The received data is written to stdout.
  71  *
  72  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  73  */
  74 int main(int argc, char *argv[])
  75 {
  76         int ret, r_opened = 0, receiver_num;
  77         struct receiver *r = NULL;
  78         struct receiver_node rn;
  79         struct stdout_task sot;
  80         static struct sched s;
  81
  82         s.default_timeout.tv_sec = 1;
  83         s.default_timeout.tv_usec = 0;
  84
  85         memset(&sot, 0, sizeof(struct stdout_task));
  86         memset(&rn, 0, sizeof(struct receiver_node));
  87         recv_init();
  88         ret = -E_RECV_SYNTAX;
  89         rn.conf = parse_config(argc, argv, &receiver_num);
  90         if (!rn.conf) {
  91                 PARA_EMERG_LOG("parse failed\n");
  92                 goto out;
  93         }
  94         r = &receivers[receiver_num];
  95         rn.receiver = r;
  96         rn.btrn = btr_new_node(&(struct btr_node_description)
  97                 EMBRACE(.name = r->name));
  98         ret = r->open(&rn);
  99         if (ret < 0)
 100                 goto out;
 101         r_opened = 1;
 102
 103         sot.btrn = btr_new_node(&(struct btr_node_description)
 104                 EMBRACE(.parent = rn.btrn, .name = "stdout"));
 105         stdout_set_defaults(&sot);
 106         register_task(&sot.task);
 107
 108         rn.task.pre_select = r->pre_select;
 109         rn.task.post_select = r->post_select;
 110         sprintf(rn.task.status, "%s", r->name);
 111         register_task(&rn.task);
 112
 113         ret = schedule(&s);
 114 out:
 115         if (r_opened)
 116                 r->close(&rn);
 117         btr_free_node(rn.btrn);
 118         btr_free_node(sot.btrn);
 119         if (rn.conf)
 120                 r->free_config(rn.conf);
 121         if (ret < 0)
 122                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 123         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 124 }