Add execute handler to struct writer.
[paraslash.git] / write.c
1 /*
2 * Copyright (C) 2005-2009 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 #include <dirent.h>
12 #include <stdbool.h>
13
14 #include "para.h"
15 #include "string.h"
16 #include "write.cmdline.h"
17 #include "list.h"
18 #include "sched.h"
19 #include "ggo.h"
20 #include "stdin.h"
21 #include "buffer_tree.h"
22 #include "write.h"
23 #include "write_common.h"
24 #include "fd.h"
25 #include "error.h"
26
27 INIT_WRITE_ERRLISTS;
28
29 /** Check if given buffer contains a valid wave header. */
30 struct check_wav_task {
31 /** The buffer to check. */
32 char *buf;
33 /** Number of bytes loaded in \a buf. */
34 size_t *loaded;
35 /** Non-zero if an error occurred or end of file was reached. */
36 int *input_error;
37 /** Number of channels specified in wav header given by \a buf. */
38 unsigned channels;
39 /** Sample rate specified in wav header given by \a buf. */
40 unsigned samplerate;
41 /** The task structure used by the scheduler. */
42 struct task task;
43 };
44
45 enum check_wav_state {
46 CWS_NEED_HEADER,
47 CWS_HAVE_HEADER,
48 CWS_NO_HEADER,
49 };
50
51 struct check_wav_task_btr {
52 int state;
53 /** Number of channels specified in wav header given by \a buf. */
54 unsigned channels;
55 /** Sample rate specified in wav header given by \a buf. */
56 unsigned samplerate;
57 /** The task structure used by the scheduler. */
58 struct task task;
59 struct btr_node *btrn;
60 };
61
62 /** Delay writing until given time. */
63 struct initial_delay_task {
64 /** The time the first data should be written out. */
65 struct timeval start_time;
66 /** The task structure for this task. */
67 struct task task;
68 };
69
70 static struct write_args_info conf;
71
72 static struct stdin_task sit;
73
74 static struct check_wav_task the_check_wav_task;
75 static struct initial_delay_task the_initial_delay_task;
76
77 static struct writer_node_group *wng;
78
79 /** Length of a standard wav header. */
80 #define WAV_HEADER_LEN 44
81
82 /**
83 * Test if audio buffer contains a valid wave header.
84 *
85 * \return If not, return -E_NO_WAV_HEADER, otherwise, return zero. If
86 * there is less than WAV_HEADER_LEN bytes available, return one.
87 */
88 static void check_wav_pre_select(__a_unused struct sched *s, struct task *t)
89 {
90 struct check_wav_task *cwt = container_of(t, struct check_wav_task, task);
91 unsigned char *a;
92 int ret;
93
94 if (*cwt->loaded < WAV_HEADER_LEN) {
95 if (*cwt->input_error < 0)
96 t->error = *cwt->input_error;
97 return;
98 }
99 cwt->channels = 2;
100 cwt->samplerate = 44100;
101 a = (unsigned char*)cwt->buf;
102 if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
103 PARA_NOTICE_LOG("wav header not found\n");
104 t->error = -E_NO_WAV_HEADER;
105 goto out;
106 }
107 cwt->channels = (unsigned) a[22];
108 cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
109 *cwt->loaded -= WAV_HEADER_LEN;
110 memmove(cwt->buf, cwt->buf + WAV_HEADER_LEN, *cwt->loaded);
111 t->error = -E_WAV_HEADER_SUCCESS;
112 PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
113 out:
114 wng->channels = &cwt->channels;
115 wng->samplerate = &cwt->samplerate;
116 ret = wng_open(wng);
117 if (ret < 0)
118 t->error = ret;
119 s->timeout.tv_sec = 0;
120 s->timeout.tv_usec = 1;
121 }
122
123 static void check_wav_pre_select_btr(__a_unused struct sched *s, struct task *t)
124 {
125 struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
126
127 if (btr_get_input_queue_size(cwt->btrn) < WAV_HEADER_LEN)
128 return;
129 s->timeout.tv_sec = 0;
130 s->timeout.tv_usec = 1;
131 }
132
133 static int check_wav_exec(struct btr_node *btrn, const char *cmd, char **result)
134 {
135 struct check_wav_task_btr *cwt = btr_context(btrn);
136
137 if (!strcmp(cmd, "samplerate")) {
138 if (cwt->state != CWS_HAVE_HEADER)
139 return -ERRNO_TO_PARA_ERROR(ENAVAIL);
140 *result = make_message("%d", cwt->samplerate);
141 return 1;
142 }
143 if (!strcmp(cmd, "channels")) {
144 if (cwt->state != CWS_HAVE_HEADER)
145 return -ERRNO_TO_PARA_ERROR(ENAVAIL);
146 *result = make_message("%d", cwt->samplerate);
147 return 1;
148 }
149 return -ERRNO_TO_PARA_ERROR(ENOTSUP);
150 }
151
152 static void check_wav_post_select_btr(__a_unused struct sched *s, struct task *t)
153 {
154 struct check_wav_task_btr *cwt = container_of(t, struct check_wav_task_btr, task);
155 unsigned char *a;
156 size_t sz = btr_get_input_queue_size(cwt->btrn);
157
158 t->error = 0;
159 if (cwt->state != CWS_NEED_HEADER)
160 goto out;
161 if (sz < WAV_HEADER_LEN) {
162 if (!btr_no_parent(cwt->btrn))
163 return;
164 if (sz != 0) {
165 cwt->state = CWS_NO_HEADER;
166 goto out;
167 }
168 t->error = -E_WRITE_EOF;
169 goto err;
170 }
171 cwt->channels = 2;
172 cwt->samplerate = 44100;
173 btr_next_buffer(cwt->btrn, (char **)&a);
174 if (a[0] != 'R' || a[1] != 'I' || a[2] != 'F' || a[3] != 'F') {
175 PARA_NOTICE_LOG("wav header not found\n");
176 cwt->state = CWS_NO_HEADER;
177 sprintf(t->status, "check wav: no header");
178 goto consume;
179 }
180 PARA_INFO_LOG("found wav header\n");
181 cwt->state = CWS_HAVE_HEADER;
182 sprintf(t->status, "check wav: have header");
183 cwt->channels = (unsigned) a[22];
184 cwt->samplerate = a[24] + (a[25] << 8) + (a[26] << 16) + (a[27] << 24);
185 consume:
186 PARA_INFO_LOG("channels: %d, sample rate: %d\n", cwt->channels, cwt->samplerate);
187 btr_consume(cwt->btrn, WAV_HEADER_LEN);
188 out:
189 if (sz) {
190 btr_pushdown(cwt->btrn);
191 s->timeout.tv_sec = 0;
192 s->timeout.tv_usec = 1;
193 } else {
194 if (btr_no_parent(cwt->btrn))
195 t->error = -E_WRITE_EOF;
196 }
197 err:
198 if (t->error < 0)
199 btr_del_node(cwt->btrn);
200 }
201
202 static void initial_delay_pre_select(struct sched *s, struct task *t)
203 {
204 struct initial_delay_task *idt = container_of(t, struct initial_delay_task, task);
205 struct timeval diff;
206
207 if (!idt->start_time.tv_sec && !idt->start_time.tv_usec) {
208 t->error = -E_NO_DELAY;
209 goto register_check_wav;
210 }
211 if (tv_diff(now, &idt->start_time, &diff) > 0) {
212 t->error = -E_DELAY_TIMEOUT;
213 goto register_check_wav;
214 }
215 if (tv_diff(&s->timeout , &diff, NULL) > 0)
216 s->timeout = diff;
217 return;
218 register_check_wav:
219 register_task(&the_check_wav_task.task);
220 s->timeout.tv_sec = 0;
221 s->timeout.tv_usec = 1;
222 }
223
224 static int loglevel;
225 INIT_STDERR_LOGGING(loglevel)
226
227 static struct writer_node_group *check_args(void)
228 {
229 int i, ret = -E_WRITE_SYNTAX;
230 struct writer_node_group *g = NULL;
231 struct initial_delay_task *idt = &the_initial_delay_task;
232
233 loglevel = get_loglevel_by_name(conf.loglevel_arg);
234 if (conf.start_time_given) {
235 long unsigned sec, usec;
236 if (sscanf(conf.start_time_arg, "%lu:%lu",
237 &sec, &usec) != 2)
238 goto out;
239 idt->start_time.tv_sec = sec;
240 idt->start_time.tv_usec = usec;
241 }
242 if (!conf.writer_given) {
243 g = setup_default_wng();
244 ret = 1;
245 goto out;
246 }
247 g = wng_new(conf.writer_given);
248 ret = -E_WRITE_SYNTAX;
249 for (i = 0; i < conf.writer_given; i++) {
250 int writer_num;
251 g->writer_nodes[i].conf = check_writer_arg(
252 conf.writer_arg[i], &writer_num);
253 if (!g->writer_nodes[i].conf)
254 goto out;
255 g->writer_nodes[i].writer_num = writer_num;
256 }
257 ret = 1;
258 out:
259 if (ret > 0)
260 return g;
261 free(g);
262 return NULL;
263 }
264
265 __noreturn static void print_help_and_die(void)
266 {
267 int d = conf.detailed_help_given;
268 const char **p = d? write_args_info_detailed_help
269 : write_args_info_help;
270
271 printf_or_die("%s\n\n", WRITE_CMDLINE_PARSER_PACKAGE "-"
272 WRITE_CMDLINE_PARSER_VERSION);
273 printf_or_die("%s\n\n", write_args_info_usage);
274 for (; *p; p++)
275 printf_or_die("%s\n", *p);
276 print_writer_helps(d);
277 exit(0);
278 }
279
280 /*
281 TODO: check wav, initial delay, multiple writers, non-default writers
282 */
283 static int main_btr(struct sched *s)
284 {
285 struct writer_node *wn = para_malloc(sizeof(*wn));
286 struct writer *w = writers + DEFAULT_WRITER;
287 int ret;
288 struct check_wav_task_btr _cwt, *cwt = &_cwt;
289
290 sit.btrn = btr_new_node("stdin", NULL /* stdin has no parent */, NULL, NULL);
291 stdin_set_defaults(&sit);
292 register_task(&sit.task);
293
294 cwt->state = CWS_NEED_HEADER;
295 cwt->btrn = btr_new_node("check wav", sit.btrn, check_wav_exec, cwt);
296 sprintf(cwt->task.status, "check wav");
297 cwt->task.pre_select = check_wav_pre_select_btr;
298 cwt->task.post_select = check_wav_post_select_btr;
299 register_task(&cwt->task);
300
301 wn->writer_num = DEFAULT_WRITER;
302 wn->conf = writers[DEFAULT_WRITER].parse_config("-B");
303 wn->btrn = btr_new_node("writer", cwt->btrn, NULL, NULL);
304 sprintf(wn->task.status, "some writer");
305 w->open(wn);
306 wn->task.post_select = w->post_select_btr;
307 wn->task.pre_select = w->pre_select_btr;
308 register_task(&wn->task);
309
310
311
312 s->default_timeout.tv_sec = 10;
313 s->default_timeout.tv_usec = 50000;
314 ret = schedule(s);
315 w->close(wn);
316 return ret;
317 }
318
319 /**
320 * Para_write's main function.
321 *
322 * \param argc The usual argument counter.
323 * \param argv The usual argument vector.
324 *
325 * It registers the stdin task, the check_wav_task, the task for initial delay
326 * and all tasks for actually writing out the stream.
327 *
328 * \return \p EXIT_SUCCESS or EXIT_FAILURE
329 */
330 int main(int argc, char *argv[])
331 {
332 int ret = -E_WRITE_SYNTAX;
333 static struct sched s;
334 struct check_wav_task *cwt = &the_check_wav_task;
335 struct initial_delay_task *idt = &the_initial_delay_task;
336
337 writer_init();
338 write_cmdline_parser(argc, argv, &conf);
339 HANDLE_VERSION_FLAG("write", conf);
340 if (conf.help_given || conf.detailed_help_given)
341 print_help_and_die();
342
343 if (conf.buffer_tree_given) {
344 ret = main_btr(&s);
345 goto out;
346 }
347 wng = check_args();
348 if (!wng)
349 goto out;
350 stdin_set_defaults(&sit);
351 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
352 if (conf.bufsize_arg < 0)
353 goto out;
354 if (conf.bufsize_arg >= INT_MAX / 1024)
355 goto out;
356 sit.bufsize = conf.bufsize_arg * 1024;
357 sit.buf = para_malloc(sit.bufsize);
358
359 wng->bufp = &sit.buf;
360 wng->loaded = &sit.loaded;
361 wng->input_error = &sit.task.error;
362
363 register_task(&sit.task);
364
365 cwt->buf = sit.buf;
366 cwt->loaded = &sit.loaded;
367 cwt->input_error = &sit.task.error;
368 sprintf(cwt->task.status, "check wav");
369 cwt->task.pre_select = check_wav_pre_select;
370
371 idt->task.pre_select = initial_delay_pre_select;
372 sprintf(idt->task.status, "initial_delay");
373 register_task(&idt->task);
374
375 s.default_timeout.tv_sec = 10;
376 s.default_timeout.tv_usec = 0;
377 ret = schedule(&s);
378 wng_close(wng);
379 out:
380 if (ret < 0) {
381 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
382 exit(EXIT_FAILURE);
383 }
384 exit(EXIT_SUCCESS);
385 }