recv.c

   1 /*
   2  * Copyright (C) 2005-2014 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 "buffer_tree.h"
  17 #include "recv.h"
  18 #include "recv.cmdline.h"
  19 #include "fd.h"
  20 #include "string.h"
  21 #include "error.h"
  22 #include "stdout.h"
  23 #include "version.h"
  24
  25 extern void afh_recv_init(struct receiver *r);
  26 #undef AFH_RECEIVER
  27 #define AFH_RECEIVER {.name = "afh", .init = afh_recv_init},
  28 DEFINE_RECEIVER_ARRAY;
  29
  30 /** The gengetopt args info struct. */
  31 static struct recv_args_info conf;
  32
  33 static int loglevel;
  34 /** Always log to stderr. */
  35 INIT_STDERR_LOGGING(loglevel);
  36
  37 /** init array of error codes used by para_recv */
  38 INIT_RECV_ERRLISTS;
  39
  40 __noreturn static void print_help_and_die(void)
  41 {
  42         struct ggo_help h = DEFINE_GGO_HELP(recv);
  43         bool d = conf.detailed_help_given;
  44
  45         ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
  46         print_receiver_helps(d? GPH_MODULE_FLAGS_DETAILED : GPH_MODULE_FLAGS);
  47         exit(0);
  48 }
  49
  50 /**
  51  * The main function of para_recv.
  52  *
  53  * \param argc number of arguments
  54  * \param argv vector of arguments
  55  *
  56  * para_recv uses the specified receiver to receive an audio stream sent by
  57  * para_server. The received data is written to stdout.
  58  *
  59  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  60  */
  61 int main(int argc, char *argv[])
  62 {
  63         int ret, r_opened = 0, receiver_num;
  64         struct receiver *r = NULL;
  65         struct receiver_node rn;
  66         struct stdout_task sot;
  67         static struct sched s;
  68         struct task_info ti;
  69
  70         recv_cmdline_parser(argc, argv, &conf);
  71         loglevel = get_loglevel_by_name(conf.loglevel_arg);
  72         version_handle_flag("recv", conf.version_given);
  73         recv_init();
  74         if (conf.help_given || conf.detailed_help_given)
  75                 print_help_and_die();
  76
  77         memset(&rn, 0, sizeof(struct receiver_node));
  78         rn.conf = check_receiver_arg(conf.receiver_arg, &receiver_num);
  79         if (!rn.conf) {
  80                 PARA_EMERG_LOG("invalid receiver specifier\n");
  81                 ret = -E_RECV_SYNTAX;
  82                 goto out;
  83         }
  84         r = &receivers[receiver_num];
  85         rn.receiver = r;
  86         rn.btrn = btr_new_node(&(struct btr_node_description)
  87                 EMBRACE(.name = r->name));
  88         ret = r->open(&rn);
  89         if (ret < 0)
  90                 goto out;
  91         r_opened = 1;
  92
  93         sot.btrn = btr_new_node(&(struct btr_node_description)
  94                 EMBRACE(.parent = rn.btrn, .name = "stdout"));
  95         stdout_task_register(&sot, &s);
  96
  97         ti.name = r->name;
  98         ti.pre_select = r->pre_select;
  99         ti.post_select = r->post_select;
 100         ti.context = &rn;
 101         rn.task = task_register(&ti, &s);
 102
 103         s.default_timeout.tv_sec = 1;
 104         s.default_timeout.tv_usec = 0;
 105         ret = schedule(&s);
 106         sched_shutdown(&s);
 107 out:
 108         if (r_opened)
 109                 r->close(&rn);
 110         btr_remove_node(&rn.btrn);
 111         btr_remove_node(&sot.btrn);
 112         if (rn.conf)
 113                 r->free_config(rn.conf);
 114
 115         if (ret < 0)
 116                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 117         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 118 }