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         int d = conf.detailed_help_given;
  39         const char **p = d? write_args_info_detailed_help
  40                 : write_args_info_help;
  41
  42         printf_or_die("%s\n\n", VERSION_SINGLE_LINE("write"));
  43         printf_or_die("%s\n\n", write_args_info_usage);
  44         for (; *p; p++)
  45                 printf_or_die("%s\n", *p);
  46         print_writer_helps(d);
  47         exit(0);
  48 }
  49
  50 /*
  51  * Parse config and register a task for a writer node.
  52  *
  53  * \param arg Command line arguments.
  54  * \param parent The new node will be a child of \a parent.
  55  * \param wn The writer node.
  56  *
  57  * If arg is \p NULL, the OS-dependent default writer is used with no
  58  * arguments.  The default writers are alsa for Linux, osx for OS X, oss for
  59  * *BSD, and the file writer if the default writer is not supported.
  60  *
  61  * Once the writer configuration has been retrieved from the ->parse_config
  62  * callback a writer node is created, its buffer tree node is added to the
  63  * buffer tree as a child of the given parent.
  64  *
  65  * Finally, the new writer node's task structure is initialized and registered
  66  * to the paraslash scheduler.
  67  *
  68  * \return Standard.
  69  */
  70 static void setup_writer_node(const char *arg, struct btr_node *parent,
  71                 struct writer_node *wn, struct sched *s)
  72 {
  73         wn->conf = check_writer_arg_or_die(arg, &wn->writer_num);
  74         register_writer_node(wn, parent, s);
  75 }
  76
  77 struct write_task {
  78         struct task task;
  79         struct check_wav_context *cwc;
  80 };
  81
  82 static void write_pre_select(struct sched *s, struct task *t)
  83 {
  84         struct write_task *wt = container_of(t, struct write_task, task);
  85         check_wav_pre_select(s, wt->cwc);
  86 }
  87
  88 static int write_post_select(__a_unused struct sched *s, struct task *t)
  89 {
  90         struct write_task *wt = container_of(t, struct write_task, task);
  91         return check_wav_post_select(wt->cwc);
  92 }
  93
  94 static int setup_and_schedule(void)
  95 {
  96         int i, ret;
  97         struct btr_node *cw_btrn;
  98         struct writer_node *wns;
  99         static struct sched s;
 100         struct wav_params wp;
 101         struct write_task wt = {
 102                 .task = {
 103                         .pre_select = write_pre_select,
 104                         .post_select = write_post_select,
 105                         .status = "write task",
 106                 },
 107         };
 108
 109         sit.btrn = btr_new_node(&(struct btr_node_description)
 110                 EMBRACE(.name = "stdin"));
 111         stdin_set_defaults(&sit);
 112         register_task(&s, &sit.task);
 113
 114         COPY_WAV_PARMS(&wp, &conf);
 115         wt.cwc = check_wav_init(sit.btrn, NULL, &wp, &cw_btrn);
 116         register_task(&s, &wt.task);
 117         if (!conf.writer_given) {
 118                 wns = para_calloc(sizeof(*wns));
 119                 setup_writer_node(NULL, cw_btrn, wns, &s);
 120                 i = 1;
 121         } else {
 122                 wns = para_calloc(conf.writer_given * sizeof(*wns));
 123                 for (i = 0; i < conf.writer_given; i++)
 124                         setup_writer_node(conf.writer_arg[i], cw_btrn,
 125                                 wns + i, &s);
 126         }
 127
 128         s.default_timeout.tv_sec = 10;
 129         s.default_timeout.tv_usec = 50000;
 130         ret = schedule(&s);
 131         if (ret >= 0) {
 132                 int j;
 133                 for (j = 0; j < i; j++) {
 134                         struct task *t = &wns[j].task;
 135                         assert(t->error < 0);
 136                         if (t->error != -E_WRITE_COMMON_EOF
 137                                         && t->error != -E_BTR_EOF) {
 138                                 PARA_ERROR_LOG("%s: %s\n", t->status,
 139                                         para_strerror(-t->error));
 140                                 if (ret >= 0)
 141                                         ret = t->error;
 142                         }
 143                 }
 144         }
 145         for (i--; i >= 0; i--) {
 146                 struct writer_node *wn = wns + i;
 147                 struct writer *w = writers + wn->writer_num;
 148
 149                 w->close(wn);
 150                 btr_remove_node(&wn->btrn);
 151                 w->free_config(wn->conf);
 152                 free(wn->conf);
 153         }
 154         free(wns);
 155         check_wav_shutdown(wt.cwc);
 156         return ret;
 157 }
 158
 159 /**
 160  * Para_write's main function.
 161  *
 162  * \param argc The usual argument counter.
 163  * \param argv The usual argument vector.
 164  *
 165  * It sets up and starts the tasks and the buffer tree nodes determined by
 166  * command line options.
 167  *
 168  * \return \p EXIT_SUCCESS or EXIT_FAILURE
 169  */
 170 int main(int argc, char *argv[])
 171 {
 172         int ret;
 173
 174         write_cmdline_parser(argc, argv, &conf);
 175         loglevel = get_loglevel_by_name(conf.loglevel_arg);
 176         writer_init();
 177         HANDLE_VERSION_FLAG("write", conf);
 178         if (conf.help_given || conf.detailed_help_given)
 179                 print_help_and_die();
 180
 181         ret = setup_and_schedule();
 182         if (ret < 0) {
 183                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 184                 exit(EXIT_FAILURE);
 185         }
 186         exit(EXIT_SUCCESS);
 187 }