recv.c

   1 /*
   2  * Copyright (C) 2005-2013 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         int d = conf.detailed_help_given;
  43         const char **p = d? recv_args_info_detailed_help
  44                 : recv_args_info_help;
  45
  46         printf_or_die("%s\n\n", RECV_CMDLINE_PARSER_PACKAGE "-"
  47                 RECV_CMDLINE_PARSER_VERSION);
  48         printf_or_die("%s\n\n", recv_args_info_usage);
  49         for (; *p; p++)
  50                 printf_or_die("%s\n", *p);
  51         print_receiver_helps(d);
  52         exit(0);
  53 }
  54
  55 static void *parse_config(int argc, char *argv[], int *receiver_num)
  56 {
  57         if (recv_cmdline_parser(argc, argv, &conf))
  58                 return NULL;
  59         HANDLE_VERSION_FLAG("recv", conf);
  60         if (conf.help_given || conf.detailed_help_given)
  61                 print_help_and_die();
  62         loglevel = get_loglevel_by_name(conf.loglevel_arg);
  63         return check_receiver_arg(conf.receiver_arg, receiver_num);
  64 }
  65
  66 /**
  67  * The main function of para_recv.
  68  *
  69  * \param argc number of arguments
  70  * \param argv vector of arguments
  71  *
  72  * para_recv uses the specified receiver to receive an audio stream sent by
  73  * para_server. The received data is written to stdout.
  74  *
  75  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  76  */
  77 int main(int argc, char *argv[])
  78 {
  79         int ret, r_opened = 0, receiver_num;
  80         struct receiver *r = NULL;
  81         struct receiver_node rn;
  82         struct stdout_task sot;
  83         static struct sched s;
  84
  85         s.default_timeout.tv_sec = 1;
  86         s.default_timeout.tv_usec = 0;
  87
  88         memset(&sot, 0, sizeof(struct stdout_task));
  89         memset(&rn, 0, sizeof(struct receiver_node));
  90         recv_init();
  91         ret = -E_RECV_SYNTAX;
  92         rn.conf = parse_config(argc, argv, &receiver_num);
  93         if (!rn.conf) {
  94                 PARA_EMERG_LOG("parse failed\n");
  95                 goto out;
  96         }
  97         r = &receivers[receiver_num];
  98         rn.receiver = r;
  99         rn.btrn = btr_new_node(&(struct btr_node_description)
 100                 EMBRACE(.name = r->name));
 101         ret = r->open(&rn);
 102         if (ret < 0)
 103                 goto out;
 104         r_opened = 1;
 105
 106         sot.btrn = btr_new_node(&(struct btr_node_description)
 107                 EMBRACE(.parent = rn.btrn, .name = "stdout"));
 108         stdout_set_defaults(&sot);
 109         register_task(&s, &sot.task);
 110
 111         rn.task.pre_select = r->pre_select;
 112         rn.task.post_select = r->post_select;
 113         sprintf(rn.task.status, "%s", r->name);
 114         register_task(&s, &rn.task);
 115
 116         ret = schedule(&s);
 117 out:
 118         if (r_opened)
 119                 r->close(&rn);
 120         btr_remove_node(&rn.btrn);
 121         btr_remove_node(&sot.btrn);
 122         if (rn.conf)
 123                 r->free_config(rn.conf);
 124
 125         if (ret < 0)
 126                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 127         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 128 }