recv.c

   1 /* Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
   2
   3 /** \file recv.c the stand-alone audio stream receiver */
   4
   5 #include <regex.h>
   6 #include <sys/types.h>
   7 #include <lopsub.h>
   8
   9 #include "recv_cmd.lsg.h"
  10 #include "recv.lsg.h"
  11 #include "para.h"
  12 #include "list.h"
  13 #include "sched.h"
  14 #include "buffer_tree.h"
  15 #include "recv.h"
  16 #include "fd.h"
  17 #include "string.h"
  18 #include "error.h"
  19 #include "stdout.h"
  20 #include "version.h"
  21
  22 /** Array of error strings. */
  23 DEFINE_PARA_ERRLIST;
  24
  25 #define CMD_PTR (lls_cmd(0, recv_suite))
  26 #define OPT_RESULT(_name, _lpr) \
  27         (lls_opt_result(LSG_RECV_PARA_RECV_OPT_ ## _name, lpr))
  28 #define OPT_GIVEN(_name, _lpr) (lls_opt_given(OPT_RESULT(_name, _lpr)))
  29 #define OPT_UINT32_VAL(_name, _lpr) (lls_uint32_val(0, OPT_RESULT(_name, _lpr)))
  30 #define OPT_STRING_VAL(_name, _lpr) (lls_string_val(0, OPT_RESULT(_name, _lpr)))
  31
  32 static int loglevel;
  33 /** Always log to stderr. */
  34 INIT_STDERR_LOGGING(loglevel);
  35
  36 static void handle_help_flag(struct lls_parse_result *lpr)
  37 {
  38         char *help;
  39
  40         if (OPT_GIVEN(DETAILED_HELP, lpr))
  41                 help = lls_long_help(CMD_PTR);
  42         else if (OPT_GIVEN(HELP, lpr))
  43                 help = lls_short_help(CMD_PTR);
  44         else
  45                 return;
  46         printf("%s\n", help);
  47         free(help);
  48         print_receiver_helps(OPT_GIVEN(DETAILED_HELP, lpr));
  49         exit(EXIT_SUCCESS);
  50 }
  51
  52 /**
  53  * The main function of para_recv.
  54  *
  55  * \param argc number of arguments
  56  * \param argv vector of arguments
  57  *
  58  * para_recv uses the specified receiver to receive an audio stream sent by
  59  * para_server. The received data is written to stdout.
  60  *
  61  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  62  */
  63 int main(int argc, char *argv[])
  64 {
  65         int ret;
  66         const struct receiver *r = NULL;
  67         struct receiver_node rn;
  68         struct stdout_task sot = {.btrn = NULL};
  69         static struct sched s;
  70         struct task_info ti;
  71         const struct lls_command *cmd;
  72         struct lls_parse_result *lpr; /* command line */
  73         struct lls_parse_result *receiver_lpr; /* receiver specific options */
  74         char *errctx;
  75
  76         ret = lls(lls_parse(argc, argv, CMD_PTR, &lpr, &errctx));
  77         if (ret < 0)
  78                 goto out;
  79         loglevel = OPT_UINT32_VAL(LOGLEVEL, lpr);
  80         version_handle_flag("recv", OPT_GIVEN(VERSION, lpr));
  81         handle_help_flag(lpr);
  82         memset(&rn, 0, sizeof(struct receiver_node));
  83         ret = check_receiver_arg(OPT_STRING_VAL(RECEIVER, lpr), &receiver_lpr);
  84         if (ret < 0)
  85                 goto free_lpr;
  86         cmd = lls_cmd(ret, recv_cmd_suite);
  87         r = lls_user_data(cmd);
  88         rn.receiver = r;
  89         rn.lpr = receiver_lpr;
  90         rn.btrn = btr_new_node(&(struct btr_node_description)
  91                 EMBRACE(.name = lls_command_name(cmd)));
  92         ret = r->open(&rn);
  93         if (ret < 0)
  94                 goto remove_btrn;
  95         sot.btrn = btr_new_node(&(struct btr_node_description)
  96                 EMBRACE(.parent = rn.btrn, .name = "stdout"));
  97         stdout_task_register(&sot, &s);
  98
  99         ti.name = lls_command_name(cmd);
 100         ti.pre_select = r->pre_select;
 101         ti.post_select = r->post_select;
 102         ti.context = &rn;
 103         rn.task = task_register(&ti, &s);
 104
 105         s.default_timeout.tv_sec = 1;
 106         s.default_timeout.tv_usec = 0;
 107         ret = schedule(&s);
 108         sched_shutdown(&s);
 109         r->close(&rn);
 110         btr_remove_node(&sot.btrn);
 111 remove_btrn:
 112         btr_remove_node(&rn.btrn);
 113         lls_free_parse_result(receiver_lpr, cmd);
 114 free_lpr:
 115         lls_free_parse_result(lpr, CMD_PTR);
 116 out:
 117         if (ret < 0) {
 118                 if (errctx)
 119                         PARA_ERROR_LOG("%s\n", errctx);
 120                 free(errctx);
 121                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 122         }
 123         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 124 }