write.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 write.c Paraslash's standalone wav/raw player. */
   8
   9 #include <regex.h>
  10 #include <sys/types.h>
  11
  12 #include "para.h"
  13 #include "string.h"
  14 #include "write.cmdline.h"
  15 #include "list.h"
  16 #include "sched.h"
  17 #include "ggo.h"
  18 #include "stdin.h"
  19 #include "buffer_tree.h"
  20 #include "write.h"
  21 #include "write_common.h"
  22 #include "fd.h"
  23 #include "error.h"
  24 #include "version.h"
  25 #include "check_wav.h"
  26
  27 INIT_WRITE_ERRLISTS;
  28
  29 static struct write_args_info conf;
  30
  31 static struct stdin_task sit;
  32
  33 static int loglevel;
  34 INIT_STDERR_LOGGING(loglevel)
  35
  36 __noreturn static void print_help_and_die(void)
  37 {
  38         struct ggo_help h = DEFINE_GGO_HELP(write);
  39         bool d = conf.detailed_help_given;
  40
  41         ggo_print_help(&h, d? GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS);
  42         print_writer_helps(d? GPH_MODULE_FLAGS_DETAILED : GPH_MODULE_FLAGS);
  43         exit(0);
  44 }
  45
  46 /*
  47  * Parse config and register a task for a writer node.
  48  *
  49  * \param arg Command line arguments.
  50  * \param parent The new node will be a child of \a parent.
  51  * \param wn The writer node.
  52  *
  53  * If arg is \p NULL, the OS-dependent default writer is used with no
  54  * arguments.  The default writers are alsa for Linux, osx for OS X, oss for
  55  * *BSD, and the file writer if the default writer is not supported.
  56  *
  57  * Once the writer configuration has been retrieved from the ->parse_config
  58  * callback a writer node is created, its buffer tree node is added to the
  59  * buffer tree as a child of the given parent.
  60  *
  61  * Finally, the new writer node's task structure is initialized and registered
  62  * to the paraslash scheduler.
  63  *
  64  * \return Standard.
  65  */
  66 static void setup_writer_node(const char *arg, struct btr_node *parent,
  67                 struct writer_node *wn, struct sched *s)
  68 {
  69         wn->conf = check_writer_arg_or_die(arg, &wn->writer_num);
  70         register_writer_node(wn, parent, s);
  71 }
  72
  73 struct write_task {
  74         struct task task;
  75         struct check_wav_context *cwc;
  76 };
  77
  78 static void write_pre_select(struct sched *s, struct task *t)
  79 {
  80         struct write_task *wt = container_of(t, struct write_task, task);
  81         check_wav_pre_select(s, wt->cwc);
  82 }
  83
  84 static int write_post_select(__a_unused struct sched *s, struct task *t)
  85 {
  86         struct write_task *wt = container_of(t, struct write_task, task);
  87         return check_wav_post_select(wt->cwc);
  88 }
  89
  90 static int setup_and_schedule(void)
  91 {
  92         int i, ret;
  93         struct btr_node *cw_btrn;
  94         struct writer_node *wns;
  95         static struct sched s;
  96         struct wav_params wp;
  97         struct write_task wt = {
  98                 .task = {
  99                         .pre_select = write_pre_select,
 100                         .post_select = write_post_select,
 101                         .status = "write task",
 102                 },
 103         };
 104
 105         sit.btrn = btr_new_node(&(struct btr_node_description)
 106                 EMBRACE(.name = "stdin"));
 107         stdin_set_defaults(&sit);
 108         register_task(&s, &sit.task);
 109
 110         COPY_WAV_PARMS(&wp, &conf);
 111         wt.cwc = check_wav_init(sit.btrn, NULL, &wp, &cw_btrn);
 112         register_task(&s, &wt.task);
 113         if (!conf.writer_given) {
 114                 wns = para_calloc(sizeof(*wns));
 115                 setup_writer_node(NULL, cw_btrn, wns, &s);
 116                 i = 1;
 117         } else {
 118                 wns = para_calloc(conf.writer_given * sizeof(*wns));
 119                 for (i = 0; i < conf.writer_given; i++)
 120                         setup_writer_node(conf.writer_arg[i], cw_btrn,
 121                                 wns + i, &s);
 122         }
 123
 124         s.default_timeout.tv_sec = 10;
 125         s.default_timeout.tv_usec = 50000;
 126         ret = schedule(&s);
 127         if (ret >= 0) {
 128                 int j;
 129                 for (j = 0; j < i; j++) {
 130                         struct task *t = &wns[j].task;
 131                         assert(t->error < 0);
 132                         if (t->error != -E_WRITE_COMMON_EOF
 133                                         && t->error != -E_BTR_EOF) {
 134                                 PARA_ERROR_LOG("%s: %s\n", t->status,
 135                                         para_strerror(-t->error));
 136                                 if (ret >= 0)
 137                                         ret = t->error;
 138                         }
 139                 }
 140         }
 141         for (i--; i >= 0; i--) {
 142                 struct writer_node *wn = wns + i;
 143                 struct writer *w = writers + wn->writer_num;
 144
 145                 w->close(wn);
 146                 btr_remove_node(&wn->btrn);
 147                 w->free_config(wn->conf);
 148                 free(wn->conf);
 149         }
 150         free(wns);
 151         check_wav_shutdown(wt.cwc);
 152         return ret;
 153 }
 154
 155 /**
 156  * Para_write's main function.
 157  *
 158  * \param argc The usual argument counter.
 159  * \param argv The usual argument vector.
 160  *
 161  * It sets up and starts the tasks and the buffer tree nodes determined by
 162  * command line options.
 163  *
 164  * \return \p EXIT_SUCCESS or EXIT_FAILURE
 165  */
 166 int main(int argc, char *argv[])
 167 {
 168         int ret;
 169
 170         write_cmdline_parser(argc, argv, &conf);
 171         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 172         writer_init();
 173         version_handle_flag("write", conf.version_given);
 174         if (conf.help_given || conf.detailed_help_given)
 175                 print_help_and_die();
 176
 177         ret = setup_and_schedule();
 178         if (ret < 0) {
 179                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 180                 exit(EXIT_FAILURE);
 181         }
 182         exit(EXIT_SUCCESS);
 183 }