Introduce version.c to limit recompilation on version changes.
[paraslash.git] / 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 version_handle_flag("write", conf.version_given);
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 }