927f5dc69df9c8a44d60c5d7221c626ccc0efaea
[paraslash.git] / play.c
1 /*
2 * Copyright (C) 2012 Andre Noll <maan@tuebingen.mpg.de>
3 *
4 * Licensed under the GPL v2. For licencing details see COPYING.
5 */
6
7 /** \file play.c Paraslash's standalone player. */
8
9 #include <regex.h>
10 #include <fnmatch.h>
11 #include <signal.h>
12
13 #include "para.h"
14 #include "list.h"
15 #include "play.cmdline.h"
16 #include "filter.cmdline.h"
17 #include "error.h"
18 #include "ggo.h"
19 #include "buffer_tree.h"
20 #include "version.h"
21 #include "string.h"
22 #include "sched.h"
23 #include "filter.h"
24 #include "afh.h"
25 #include "recv.h"
26 #include "write.h"
27 #include "write_common.h"
28 #include "fd.h"
29
30 /**
31 * Besides playback tasks which correspond to the receiver/filter/writer nodes,
32 * para_play creates two further tasks: The play task and the i9e task. It is
33 * important whether a function can be called in the context of para_play or
34 * i9e or both. As a rule, all command handlers are called only in i9e context via
35 * the line handler (input mode) or the key handler (command mode) below.
36 *
37 * Playlist handling is done exclusively in play context.
38 */
39
40 /**
41 * Describes a request to change the state of para_play.
42 *
43 * There is only one variable of this type: \a rq of the global play task
44 * structure. Command handlers only set this variable and the post_select()
45 * function of the play task investigates its value during each iteration of
46 * the scheduler run and performs the actual work.
47 */
48 enum state_change_request_type {
49 /** Everybody is happy. */
50 CRT_NONE,
51 /** Stream must be repositioned (com_jmp(), com_ff()). */
52 CRT_REPOS,
53 /** New file should be loaded (com_next()). */
54 CRT_FILE_CHANGE,
55 /** Someone wants us for dead (com_quit()). */
56 CRT_TERM_RQ
57 };
58
59 struct play_task {
60 struct task *task;
61 /* A bit array of invalid files (those will be skipped). */
62 bool *invalid;
63 /* The file which is currently open. */
64 unsigned current_file;
65 /* When to update the status again. */
66 struct timeval next_update;
67
68 /* Root of the buffer tree for command and status output. */
69 struct btr_node *btrn;
70
71 /* The decoding machinery. */
72 struct receiver_node rn;
73 struct filter_node fn;
74 struct writer_node wn;
75
76 /* See comment to enum state_change_request_type above */
77 enum state_change_request_type rq;
78 /* only relevant if rq == CRT_FILE_CHANGE */
79 unsigned next_file;
80 /*
81 bg: read lines at prompt, fg: display status and wait
82 for keystroke.
83 */
84 bool background;
85
86 /* We have the *intention* to play. Set by com_play(). */
87 bool playing;
88
89 /* as returned by afh_recv->open() */
90 int audio_format_num;
91
92 /* retrieved via the btr exec mechanism */
93 long unsigned start_chunk;
94 long unsigned seconds;
95 long unsigned num_chunks;
96 char *afhi_txt;
97 };
98
99 /** Initialize the array of errors for para_play. */
100 INIT_PLAY_ERRLISTS;
101
102 /* Activate the afh receiver. */
103 extern void afh_recv_init(struct receiver *r);
104 #undef AFH_RECEIVER
105 /** Initialization code for a receiver struct. */
106 #define AFH_RECEIVER {.name = "afh", .init = afh_recv_init},
107 /** This expands to the array of all receivers. */
108 DEFINE_RECEIVER_ARRAY;
109
110 static int loglevel = LL_WARNING;
111
112 /** The log function which writes log messages to stderr. */
113 INIT_STDERR_LOGGING(loglevel);
114
115 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
116
117 /** Iterate over all files in the playlist. */
118 #define FOR_EACH_PLAYLIST_FILE(i) for (i = 0; i < conf.inputs_num; i++)
119 static struct play_args_info conf;
120
121 static struct sched sched = {.max_fileno = 0};
122 static struct play_task play_task;
123 static struct receiver *afh_recv;
124
125 static void check_afh_receiver_or_die(void)
126 {
127 int i;
128
129 FOR_EACH_RECEIVER(i) {
130 struct receiver *r = receivers + i;
131 if (strcmp(r->name, "afh"))
132 continue;
133 afh_recv = r;
134 return;
135 }
136 PARA_EMERG_LOG("fatal: afh receiver not found\n");
137 exit(EXIT_FAILURE);
138 }
139
140 __noreturn static void print_help_and_die(void)
141 {
142 struct ggo_help help = DEFINE_GGO_HELP(play);
143 unsigned flags = conf.detailed_help_given?
144 GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS;
145
146 ggo_print_help(&help, flags);
147 printf("supported audio formats: %s\n", AUDIO_FORMAT_HANDLERS);
148 exit(0);
149 }
150
151 static void parse_config_or_die(int argc, char *argv[])
152 {
153 int i, ret;
154 char *config_file;
155 struct play_cmdline_parser_params params = {
156 .override = 0,
157 .initialize = 1,
158 .check_required = 0,
159 .check_ambiguity = 0,
160 .print_errors = 1
161 };
162
163 play_cmdline_parser_ext(argc, argv, &conf, &params);
164 loglevel = get_loglevel_by_name(conf.loglevel_arg);
165 version_handle_flag("play", conf.version_given);
166 if (conf.help_given || conf.detailed_help_given)
167 print_help_and_die();
168 if (conf.config_file_given)
169 config_file = para_strdup(conf.config_file_arg);
170 else {
171 char *home = para_homedir();
172 config_file = make_message("%s/.paraslash/play.conf", home);
173 free(home);
174 }
175 ret = file_exists(config_file);
176 if (conf.config_file_given && !ret) {
177 PARA_EMERG_LOG("can not read config file %s\n", config_file);
178 goto err;
179 }
180 if (ret) {
181 params.initialize = 0;
182 params.check_required = 1;
183 play_cmdline_parser_config_file(config_file, &conf, &params);
184 loglevel = get_loglevel_by_name(conf.loglevel_arg);
185 }
186 for (i = 0; i < conf.key_map_given; i++) {
187 char *kma = conf.key_map_arg[i];
188 if (*kma && strchr(kma + 1, ':'))
189 continue;
190 PARA_EMERG_LOG("invalid key map arg: %s\n", kma);
191 goto err;
192 }
193 free(config_file);
194 return;
195 err:
196 free(config_file);
197 exit(EXIT_FAILURE);
198 }
199
200 static char get_playback_state(struct play_task *pt)
201 {
202 switch (pt->rq) {
203 case CRT_NONE: return pt->playing? 'P' : 'U';
204 case CRT_REPOS: return 'R';
205 case CRT_FILE_CHANGE: return 'F';
206 case CRT_TERM_RQ: return 'X';
207 }
208 assert(false);
209 };
210
211 static long unsigned get_play_time(struct play_task *pt)
212 {
213 char state = get_playback_state(pt);
214 long unsigned result;
215
216 if (state != 'P' && state != 'U')
217 return 0;
218 if (pt->num_chunks == 0 || pt->seconds == 0)
219 return 0;
220 /* where the stream started (in seconds) */
221 result = pt->start_chunk * pt->seconds / pt->num_chunks;
222 if (pt->wn.btrn) { /* Add the uptime of the writer node */
223 struct timeval diff = {.tv_sec = 0}, wstime;
224 btr_get_node_start(pt->wn.btrn, &wstime);
225 if (wstime.tv_sec > 0)
226 tv_diff(now, &wstime, &diff);
227 result += diff.tv_sec;
228 }
229 result = PARA_MIN(result, pt->seconds);
230 result = PARA_MAX(result, 0UL);
231 return result;
232 }
233
234 static void wipe_receiver_node(struct play_task *pt)
235 {
236 PARA_NOTICE_LOG("cleaning up receiver node\n");
237 btr_remove_node(&pt->rn.btrn);
238 afh_recv->close(&pt->rn);
239 afh_recv->free_config(pt->rn.conf);
240 memset(&pt->rn, 0, sizeof(struct receiver_node));
241 }
242
243 /* returns: 0 not eof, 1: eof, < 0: fatal error. */
244 static int get_playback_error(struct play_task *pt)
245 {
246 int err;
247
248 if (!pt->wn.task)
249 return 0;
250 err = task_status(pt->wn.task);
251 if (err >= 0)
252 return 0;
253 if (task_status(pt->fn.task) >= 0)
254 return 0;
255 if (task_status(pt->rn.task) >= 0)
256 return 0;
257 if (err == -E_BTR_EOF || err == -E_RECV_EOF || err == -E_EOF
258 || err == -E_WRITE_COMMON_EOF)
259 return 1;
260 return err;
261 }
262
263 static int eof_cleanup(struct play_task *pt)
264 {
265 struct writer *w = writers + DEFAULT_WRITER;
266 const struct filter *decoder = filter_get(pt->fn.filter_num);
267 int ret;
268
269 ret = get_playback_error(pt);
270 if (ret == 0)
271 return ret;
272 PARA_NOTICE_LOG("cleaning up wn/fn nodes\n");
273 task_reap(&pt->wn.task);
274 w->close(&pt->wn);
275 btr_remove_node(&pt->wn.btrn);
276 w->free_config(pt->wn.conf);
277 memset(&pt->wn, 0, sizeof(struct writer_node));
278
279 task_reap(&pt->fn.task);
280 if (decoder->close)
281 decoder->close(&pt->fn);
282 btr_remove_node(&pt->fn.btrn);
283 free(pt->fn.conf);
284 memset(&pt->fn, 0, sizeof(struct filter_node));
285
286 task_reap(&pt->rn.task);
287 btr_remove_node(&pt->rn.btrn);
288 /*
289 * On eof (ret > 0), we do not wipe the receiver node struct until a
290 * new file is loaded because we still need it for jumping around when
291 * paused.
292 */
293 if (ret < 0)
294 wipe_receiver_node(pt);
295 return ret;
296 }
297
298 static int shuffle_compare(__a_unused const void *a, __a_unused const void *b)
299 {
300 return para_random(100) - 50;
301 }
302
303 static void shuffle(char **base, size_t num)
304 {
305 srandom(time(NULL));
306 qsort(base, num, sizeof(char *), shuffle_compare);
307 }
308
309 static struct btr_node *new_recv_btrn(struct receiver_node *rn)
310 {
311 return btr_new_node(&(struct btr_node_description)
312 EMBRACE(.name = afh_recv->name, .context = rn,
313 .handler = afh_recv->execute));
314 }
315
316 static int open_new_file(struct play_task *pt)
317 {
318 int ret;
319 char *tmp, *path = conf.inputs[pt->next_file], *afh_recv_conf[] =
320 {"play", "-f", path, "-b", "0", NULL};
321
322 PARA_NOTICE_LOG("next file: %s\n", path);
323 wipe_receiver_node(pt);
324 pt->start_chunk = 0;
325 pt->rn.btrn = new_recv_btrn(&pt->rn);
326 pt->rn.conf = afh_recv->parse_config(ARRAY_SIZE(afh_recv_conf) - 1,
327 afh_recv_conf);
328 assert(pt->rn.conf);
329 pt->rn.receiver = afh_recv;
330 ret = afh_recv->open(&pt->rn);
331 if (ret < 0) {
332 PARA_ERROR_LOG("could not open %s: %s\n", path,
333 para_strerror(-ret));
334 goto fail;
335 }
336 pt->audio_format_num = ret;
337 free(pt->afhi_txt);
338 ret = btr_exec_up(pt->rn.btrn, "afhi", &pt->afhi_txt);
339 if (ret < 0)
340 pt->afhi_txt = make_message("[afhi command failed]\n");
341 ret = btr_exec_up(pt->rn.btrn, "seconds_total", &tmp);
342 if (ret < 0)
343 pt->seconds = 1;
344 else {
345 int32_t x;
346 ret = para_atoi32(tmp, &x);
347 pt->seconds = ret < 0? 1 : x;
348 free(tmp);
349 tmp = NULL;
350 }
351 ret = btr_exec_up(pt->rn.btrn, "chunks_total", &tmp);
352 if (ret < 0)
353 pt->num_chunks = 1;
354 else {
355 int32_t x;
356 ret = para_atoi32(tmp, &x);
357 pt->num_chunks = ret < 0? 1 : x;
358 free(tmp);
359 tmp = NULL;
360 }
361 return 1;
362 fail:
363 wipe_receiver_node(pt);
364 return ret;
365 }
366
367 static int load_file(struct play_task *pt)
368 {
369 const char *af;
370 char *tmp, buf[20];
371 int ret;
372 const struct filter *decoder;
373
374 btr_remove_node(&pt->rn.btrn);
375 if (!pt->rn.receiver || pt->next_file != pt->current_file) {
376 ret = open_new_file(pt);
377 if (ret < 0)
378 return ret;
379 } else {
380 pt->rn.btrn = new_recv_btrn(&pt->rn);
381 sprintf(buf, "repos %lu", pt->start_chunk);
382 ret = btr_exec_up(pt->rn.btrn, buf, &tmp);
383 if (ret < 0)
384 PARA_CRIT_LOG("repos failed: %s\n", para_strerror(-ret));
385 freep(&tmp);
386 }
387 if (!pt->playing)
388 return 0;
389 /* set up decoding filter */
390 af = audio_format_name(pt->audio_format_num);
391 tmp = make_message("%sdec", af);
392 ret = check_filter_arg(tmp, &pt->fn.conf);
393 freep(&tmp);
394 if (ret < 0)
395 goto fail;
396 pt->fn.filter_num = ret;
397 decoder = filter_get(ret);
398 pt->fn.btrn = btr_new_node(&(struct btr_node_description)
399 EMBRACE(.name = decoder->name, .parent = pt->rn.btrn,
400 .handler = decoder->execute, .context = &pt->fn));
401 decoder->open(&pt->fn);
402
403 /* setup default writer */
404 pt->wn.conf = check_writer_arg_or_die(NULL, &pt->wn.writer_num);
405
406 /* success, register tasks */
407 pt->rn.task = task_register(
408 &(struct task_info) {
409 .name = afh_recv->name,
410 .pre_select = afh_recv->pre_select,
411 .post_select = afh_recv->post_select,
412 .context = &pt->rn
413 }, &sched);
414 sprintf(buf, "%s decoder", af);
415 pt->fn.task = task_register(
416 &(struct task_info) {
417 .name = buf,
418 .pre_select = decoder->pre_select,
419 .post_select = decoder->post_select,
420 .context = &pt->fn
421 }, &sched);
422 register_writer_node(&pt->wn, pt->fn.btrn, &sched);
423 return 1;
424 fail:
425 wipe_receiver_node(pt);
426 return ret;
427 }
428
429 static int next_valid_file(struct play_task *pt)
430 {
431 int i, j = pt->current_file;
432
433 FOR_EACH_PLAYLIST_FILE(i) {
434 j = (j + 1) % conf.inputs_num;
435 if (!pt->invalid[j])
436 return j;
437 }
438 return -E_NO_VALID_FILES;
439 }
440
441 static int load_next_file(struct play_task *pt)
442 {
443 int ret;
444
445 again:
446 if (pt->rq == CRT_NONE) {
447 pt->start_chunk = 0;
448 ret = next_valid_file(pt);
449 if (ret < 0)
450 return ret;
451 pt->next_file = ret;
452 } else if (pt->rq == CRT_REPOS)
453 pt->next_file = pt->current_file;
454 ret = load_file(pt);
455 if (ret < 0) {
456 pt->invalid[pt->next_file] = true;
457 pt->rq = CRT_NONE;
458 goto again;
459 }
460 pt->current_file = pt->next_file;
461 pt->rq = CRT_NONE;
462 return ret;
463 }
464
465 static void kill_stream(struct play_task *pt)
466 {
467 if (pt->wn.task)
468 task_notify(pt->wn.task, E_EOF);
469 }
470
471 #ifdef HAVE_READLINE
472
473 /* only called from com_prev(), nec. only if we have readline */
474 static int previous_valid_file(struct play_task *pt)
475 {
476 int i, j = pt->current_file;
477
478 FOR_EACH_PLAYLIST_FILE(i) {
479 j--;
480 if (j < 0)
481 j = conf.inputs_num - 1;
482 if (!pt->invalid[j])
483 return j;
484 }
485 return -E_NO_VALID_FILES;
486 }
487
488 #include "interactive.h"
489
490 /*
491 * Define the default (internal) key mappings and helper functions to get the
492 * key sequence or the command from a key id, which is what we obtain from
493 * i9e/readline when the key is pressed.
494 *
495 * In some of these helper functions we could return pointers to the constant
496 * arrays defined below. However, for others we can not, so let's better be
497 * consistent and allocate all returned strings on the heap.
498 */
499
500 #define INTERNAL_KEYMAP_ENTRIES \
501 KEYMAP_ENTRY("^", "jmp 0"), \
502 KEYMAP_ENTRY("1", "jmp 10"), \
503 KEYMAP_ENTRY("2", "jmp 21"), \
504 KEYMAP_ENTRY("3", "jmp 32"), \
505 KEYMAP_ENTRY("4", "jmp 43"), \
506 KEYMAP_ENTRY("5", "jmp 54"), \
507 KEYMAP_ENTRY("6", "jmp 65"), \
508 KEYMAP_ENTRY("7", "jmp 76"), \
509 KEYMAP_ENTRY("8", "jmp 87"), \
510 KEYMAP_ENTRY("9", "jmp 98"), \
511 KEYMAP_ENTRY("+", "next"), \
512 KEYMAP_ENTRY("-", "prev"), \
513 KEYMAP_ENTRY(":", "bg"), \
514 KEYMAP_ENTRY("i", "info"), \
515 KEYMAP_ENTRY("l", "ls"), \
516 KEYMAP_ENTRY("s", "play"), \
517 KEYMAP_ENTRY("p", "pause"), \
518 KEYMAP_ENTRY("q", "quit"), \
519 KEYMAP_ENTRY("?", "help"), \
520 KEYMAP_ENTRY("\033[D", "ff -10"), \
521 KEYMAP_ENTRY("\033[C", "ff 10"), \
522 KEYMAP_ENTRY("\033[A", "ff 60"), \
523 KEYMAP_ENTRY("\033[B", "ff -60"), \
524
525 #define KEYMAP_ENTRY(a, b) a
526 static const char *default_keyseqs[] = {INTERNAL_KEYMAP_ENTRIES};
527 #undef KEYMAP_ENTRY
528 #define KEYMAP_ENTRY(a, b) b
529 static const char *default_commands[] = {INTERNAL_KEYMAP_ENTRIES};
530 #undef KEYMAP_ENTRY
531 #define NUM_INTERNALLY_MAPPED_KEYS ARRAY_SIZE(default_commands)
532 #define NUM_MAPPED_KEYS (NUM_INTERNALLY_MAPPED_KEYS + conf.key_map_given)
533 #define FOR_EACH_MAPPED_KEY(i) for (i = 0; i < NUM_MAPPED_KEYS; i++)
534
535 static inline bool is_internal_key(int key)
536 {
537 return key < NUM_INTERNALLY_MAPPED_KEYS;
538 }
539
540 /* for internal keys, the key id is just the array index. */
541 static inline int get_internal_key_map_idx(int key)
542 {
543 assert(is_internal_key(key));
544 return key;
545 }
546
547 /*
548 * For user-defined keys, we have to subtract NUM_INTERNALLY_MAPPED_KEYS. The
549 * difference is the index to the array of user defined key maps.
550 */
551 static inline int get_user_key_map_idx(int key)
552 {
553 assert(!is_internal_key(key));
554 return key - NUM_INTERNALLY_MAPPED_KEYS;
555 }
556
557 static inline int get_key_map_idx(int key)
558 {
559 return is_internal_key(key)?
560 get_internal_key_map_idx(key) : get_user_key_map_idx(key);
561 }
562
563 static inline char *get_user_key_map_arg(int key)
564 {
565 return conf.key_map_arg[get_user_key_map_idx(key)];
566 }
567
568 static inline char *get_internal_key_map_seq(int key)
569 {
570 return para_strdup(default_keyseqs[get_internal_key_map_idx(key)]);
571 }
572
573 static char *get_user_key_map_seq(int key)
574 {
575 const char *kma = get_user_key_map_arg(key);
576 const char *p = strchr(kma + 1, ':');
577 char *result;
578 int len;
579
580 if (!p)
581 return NULL;
582 len = p - kma;
583 result = para_malloc(len + 1);
584 memcpy(result, kma, len);
585 result[len] = '\0';
586 return result;
587 }
588
589 static char *get_key_map_seq(int key)
590 {
591 return is_internal_key(key)?
592 get_internal_key_map_seq(key) : get_user_key_map_seq(key);
593 }
594
595 static inline char *get_internal_key_map_cmd(int key)
596 {
597 return para_strdup(default_commands[get_internal_key_map_idx(key)]);
598 }
599
600 static char *get_user_key_map_cmd(int key)
601 {
602 const char *kma = get_user_key_map_arg(key);
603 const char *p = strchr(kma + 1, ':');
604
605 if (!p)
606 return NULL;
607 return para_strdup(p + 1);
608 }
609
610 static char *get_key_map_cmd(int key)
611 {
612 return is_internal_key(key)?
613 get_internal_key_map_cmd(key) : get_user_key_map_cmd(key);
614 }
615
616 static char **get_mapped_keyseqs(void)
617 {
618 char **result;
619 int i;
620
621 result = para_malloc((NUM_MAPPED_KEYS + 1) * sizeof(char *));
622 FOR_EACH_MAPPED_KEY(i) {
623 int idx = get_key_map_idx(i);
624 char *seq = get_key_map_seq(i);
625 char *cmd = get_key_map_cmd(i);
626 bool internal = is_internal_key(i);
627 PARA_DEBUG_LOG("%s key sequence #%d: %s -> %s\n",
628 internal? "internal" : "user-defined",
629 idx, seq, cmd);
630 result[i] = seq;
631 free(cmd);
632 }
633 result[i] = NULL;
634 return result;
635 }
636
637 #include "play.command_list.h"
638
639 typedef int play_command_handler_t(struct play_task *, int, char**);
640 static play_command_handler_t PLAY_COMMAND_HANDLERS;
641
642 /* defines one command of para_play */
643 struct pp_command {
644 const char *name;
645 play_command_handler_t *handler;
646 const char *description;
647 const char *usage;
648 const char *help;
649 };
650
651 static struct pp_command pp_cmds[] = {DEFINE_PLAY_CMD_ARRAY};
652 #define FOR_EACH_COMMAND(c) for (c = 0; pp_cmds[c].name; c++)
653
654 #include "play.completion.h"
655 static struct i9e_completer pp_completers[];
656
657 I9E_DUMMY_COMPLETER(jmp);
658 I9E_DUMMY_COMPLETER(next);
659 I9E_DUMMY_COMPLETER(prev);
660 I9E_DUMMY_COMPLETER(fg);
661 I9E_DUMMY_COMPLETER(bg);
662 I9E_DUMMY_COMPLETER(ls);
663 I9E_DUMMY_COMPLETER(info);
664 I9E_DUMMY_COMPLETER(play);
665 I9E_DUMMY_COMPLETER(pause);
666 I9E_DUMMY_COMPLETER(stop);
667 I9E_DUMMY_COMPLETER(tasks);
668 I9E_DUMMY_COMPLETER(quit);
669 I9E_DUMMY_COMPLETER(ff);
670
671 static void help_completer(struct i9e_completion_info *ci,
672 struct i9e_completion_result *result)
673 {
674 result->matches = i9e_complete_commands(ci->word, pp_completers);
675 }
676
677 static struct i9e_completer pp_completers[] = {PLAY_COMPLETERS {.name = NULL}};
678
679 static void attach_stdout(struct play_task *pt, const char *name)
680 {
681 if (pt->btrn)
682 return;
683 pt->btrn = btr_new_node(&(struct btr_node_description)
684 EMBRACE(.name = name));
685 i9e_attach_to_stdout(pt->btrn);
686 }
687
688 static void detach_stdout(struct play_task *pt)
689 {
690 btr_remove_node(&pt->btrn);
691 }
692
693 static int com_quit(struct play_task *pt, int argc, __a_unused char **argv)
694 {
695 if (argc != 1)
696 return -E_PLAY_SYNTAX;
697 pt->rq = CRT_TERM_RQ;
698 return 0;
699 }
700
701 static int com_help(struct play_task *pt, int argc, char **argv)
702 {
703 int i;
704 char *buf;
705 size_t sz;
706
707 if (argc > 2)
708 return -E_PLAY_SYNTAX;
709 if (argc < 2) {
710 if (pt->background)
711 FOR_EACH_COMMAND(i) {
712 sz = xasprintf(&buf, "%s\t%s\n", pp_cmds[i].name,
713 pp_cmds[i].description);
714 btr_add_output(buf, sz, pt->btrn);
715 }
716 else {
717 FOR_EACH_MAPPED_KEY(i) {
718 bool internal = is_internal_key(i);
719 int idx = get_key_map_idx(i);
720 char *seq = get_key_map_seq(i);
721 char *cmd = get_key_map_cmd(i);
722 sz = xasprintf(&buf,
723 "%s key #%d: %s -> %s\n",
724 internal? "internal" : "user-defined",
725 idx, seq, cmd);
726 btr_add_output(buf, sz, pt->btrn);
727 free(seq);
728 free(cmd);
729 }
730 }
731 return 0;
732 }
733 FOR_EACH_COMMAND(i) {
734 if (strcmp(pp_cmds[i].name, argv[1]))
735 continue;
736 sz = xasprintf(&buf,
737 "NAME\n\t%s -- %s\n"
738 "SYNOPSIS\n\t%s\n"
739 "DESCRIPTION\n%s\n",
740 argv[1],
741 pp_cmds[i].description,
742 pp_cmds[i].usage,
743 pp_cmds[i].help
744 );
745 btr_add_output(buf, sz, pt->btrn);
746 return 0;
747 }
748 return -E_BAD_PLAY_CMD;
749 }
750
751 static int com_info(struct play_task *pt, int argc, __a_unused char **argv)
752 {
753 char *buf;
754 size_t sz;
755 static char dflt[] = "[no information available]";
756
757 if (argc != 1)
758 return -E_PLAY_SYNTAX;
759 sz = xasprintf(&buf, "playlist_pos: %u\npath: %s\n",
760 pt->current_file, conf.inputs[pt->current_file]);
761 btr_add_output(buf, sz, pt->btrn);
762 buf = pt->afhi_txt? pt->afhi_txt : dflt;
763 btr_add_output_dont_free(buf, strlen(buf), pt->btrn);
764 return 0;
765 }
766
767 static void list_file(struct play_task *pt, int num)
768 {
769 char *buf;
770 size_t sz;
771
772 sz = xasprintf(&buf, "%s %4u %s\n", num == pt->current_file?
773 "*" : " ", num, conf.inputs[num]);
774 btr_add_output(buf, sz, pt->btrn);
775 }
776
777 static int com_tasks(struct play_task *pt, int argc, __a_unused char **argv)
778 {
779 static char state;
780 char *buf;
781 size_t sz;
782
783 if (argc != 1)
784 return -E_PLAY_SYNTAX;
785
786 buf = get_task_list(&sched);
787 btr_add_output(buf, strlen(buf), pt->btrn);
788 state = get_playback_state(pt);
789 sz = xasprintf(&buf, "state: %c\n", state);
790 btr_add_output(buf, sz, pt->btrn);
791 return 0;
792 }
793
794 static int com_ls(struct play_task *pt, int argc, char **argv)
795 {
796 int i, j, ret;
797
798 if (argc == 1) {
799 FOR_EACH_PLAYLIST_FILE(i)
800 list_file(pt, i);
801 return 0;
802 }
803 for (j = 1; j < argc; j++) {
804 FOR_EACH_PLAYLIST_FILE(i) {
805 ret = fnmatch(argv[j], conf.inputs[i], 0);
806 if (ret == 0) /* match */
807 list_file(pt, i);
808 }
809 }
810 return 0;
811 }
812
813 static int com_play(struct play_task *pt, int argc, char **argv)
814 {
815 int32_t x;
816 int ret;
817 char state;
818
819 if (argc > 2)
820 return -E_PLAY_SYNTAX;
821 state = get_playback_state(pt);
822 if (argc == 1) {
823 if (state == 'P')
824 return 0;
825 pt->next_file = pt->current_file;
826 pt->rq = CRT_REPOS;
827 pt->playing = true;
828 return 0;
829 }
830 ret = para_atoi32(argv[1], &x);
831 if (ret < 0)
832 return ret;
833 if (x < 0 || x >= conf.inputs_num)
834 return -ERRNO_TO_PARA_ERROR(EINVAL);
835 kill_stream(pt);
836 pt->next_file = x;
837 pt->rq = CRT_FILE_CHANGE;
838 return 0;
839 }
840
841 static int com_pause(struct play_task *pt, int argc, __a_unused char **argv)
842 {
843 char state;
844 long unsigned seconds, ss;
845
846 if (argc != 1)
847 return -E_PLAY_SYNTAX;
848 state = get_playback_state(pt);
849 pt->playing = false;
850 if (state != 'P')
851 return 0;
852 seconds = get_play_time(pt);
853 pt->playing = false;
854 ss = 0;
855 if (pt->seconds > 0)
856 ss = seconds * pt->num_chunks / pt->seconds + 1;
857 ss = PARA_MAX(ss, 0UL);
858 ss = PARA_MIN(ss, pt->num_chunks);
859 pt->start_chunk = ss;
860 kill_stream(pt);
861 return 0;
862 }
863
864 static int com_prev(struct play_task *pt, int argc, __a_unused char **argv)
865
866 {
867 int ret;
868
869 if (argc != 1)
870 return -E_PLAY_SYNTAX;
871 ret = previous_valid_file(pt);
872 if (ret < 0)
873 return ret;
874 kill_stream(pt);
875 pt->next_file = ret;
876 pt->rq = CRT_FILE_CHANGE;
877 pt->start_chunk = 0;
878 return 0;
879 }
880
881 static int com_next(struct play_task *pt, int argc, __a_unused char **argv)
882 {
883 int ret;
884
885 if (argc != 1)
886 return -E_PLAY_SYNTAX;
887 ret = next_valid_file(pt);
888 if (ret < 0)
889 return ret;
890 kill_stream(pt);
891 pt->next_file = ret;
892 pt->rq = CRT_FILE_CHANGE;
893 pt->start_chunk = 0;
894 return 0;
895 }
896
897 static int com_fg(struct play_task *pt, int argc, __a_unused char **argv)
898 {
899 if (argc != 1)
900 return -E_PLAY_SYNTAX;
901 pt->background = false;
902 return 0;
903 }
904
905 static int com_bg(struct play_task *pt, int argc, __a_unused char **argv)
906 {
907 if (argc != 1)
908 return -E_PLAY_SYNTAX;
909 pt->background = true;
910 return 0;
911 }
912
913 static int com_jmp(struct play_task *pt, int argc, char **argv)
914 {
915 int32_t percent;
916 int ret;
917
918 if (argc != 2)
919 return -E_PLAY_SYNTAX;
920 ret = para_atoi32(argv[1], &percent);
921 if (ret < 0)
922 return ret;
923 if (percent < 0 || percent > 100)
924 return -ERRNO_TO_PARA_ERROR(EINVAL);
925 if (percent == 100)
926 return com_next(pt, 1, (char *[]){"next", NULL});
927 if (pt->playing && !pt->fn.btrn)
928 return 0;
929 pt->start_chunk = percent * pt->num_chunks / 100;
930 if (!pt->playing)
931 return 0;
932 pt->rq = CRT_REPOS;
933 kill_stream(pt);
934 return 0;
935 }
936
937 static int com_ff(struct play_task *pt, int argc, char **argv)
938 {
939 int32_t seconds;
940 int ret;
941
942 if (argc != 2)
943 return -E_PLAY_SYNTAX;
944 ret = para_atoi32(argv[1], &seconds);
945 if (ret < 0)
946 return ret;
947 if (pt->playing && !pt->fn.btrn)
948 return 0;
949 seconds += get_play_time(pt);
950 seconds = PARA_MIN(seconds, (typeof(seconds))pt->seconds - 4);
951 seconds = PARA_MAX(seconds, 0);
952 pt->start_chunk = pt->num_chunks * seconds / pt->seconds;
953 pt->start_chunk = PARA_MIN(pt->start_chunk, pt->num_chunks - 1);
954 pt->start_chunk = PARA_MAX(pt->start_chunk, 0UL);
955 if (!pt->playing)
956 return 0;
957 pt->rq = CRT_REPOS;
958 kill_stream(pt);
959 return 0;
960 }
961
962 static int run_command(char *line, struct play_task *pt)
963 {
964 int i, ret, argc;
965 char **argv = NULL;
966
967 attach_stdout(pt, __FUNCTION__);
968 ret = create_argv(line, " ", &argv);
969 if (ret < 0) {
970 PARA_ERROR_LOG("parse error: %s\n", para_strerror(-ret));
971 return 0;
972 }
973 if (ret == 0)
974 goto out;
975 argc = ret;
976 FOR_EACH_COMMAND(i) {
977 if (strcmp(pp_cmds[i].name, argv[0]))
978 continue;
979 ret = pp_cmds[i].handler(pt, argc, argv);
980 if (ret < 0)
981 PARA_WARNING_LOG("%s: %s\n", pt->background?
982 "" : argv[0], para_strerror(-ret));
983 ret = 1;
984 goto out;
985 }
986 PARA_WARNING_LOG("invalid command: %s\n", argv[0]);
987 ret = 0;
988 out:
989 free_argv(argv);
990 return ret;
991 }
992
993 static int play_i9e_line_handler(char *line)
994 {
995 return run_command(line, &play_task);
996 }
997
998 static int play_i9e_key_handler(int key)
999 {
1000 struct play_task *pt = &play_task;
1001 int idx = get_key_map_idx(key);
1002 char *seq = get_key_map_seq(key);
1003 char *cmd = get_key_map_cmd(key);
1004 bool internal = is_internal_key(key);
1005
1006 PARA_NOTICE_LOG("pressed %d: %s key #%d (%s -> %s)\n",
1007 key, internal? "internal" : "user-defined",
1008 idx, seq, cmd);
1009 run_command(cmd, pt);
1010 free(seq);
1011 free(cmd);
1012 pt->next_update = *now;
1013 return 0;
1014 }
1015
1016 static struct i9e_client_info ici = {
1017 .fds = {0, 1, 2},
1018 .prompt = "para_play> ",
1019 .line_handler = play_i9e_line_handler,
1020 .key_handler = play_i9e_key_handler,
1021 .completers = pp_completers,
1022 };
1023
1024 static void sigint_handler(int sig)
1025 {
1026 play_task.background = true;
1027 i9e_signal_dispatch(sig);
1028 }
1029
1030 /*
1031 * We start with para_log() set to the standard log function which writes to
1032 * stderr. Once the i9e subsystem has been initialized, we switch to the i9e
1033 * log facility.
1034 */
1035 static void session_open(struct play_task *pt)
1036 {
1037 int ret;
1038 char *history_file;
1039 struct sigaction act;
1040
1041 PARA_NOTICE_LOG("\n%s\n", version_text("play"));
1042 if (conf.history_file_given)
1043 history_file = para_strdup(conf.history_file_arg);
1044 else {
1045 char *home = para_homedir();
1046 history_file = make_message("%s/.paraslash/play.history",
1047 home);
1048 free(home);
1049 }
1050 ici.history_file = history_file;
1051 ici.loglevel = loglevel;
1052
1053 act.sa_handler = sigint_handler;
1054 sigemptyset(&act.sa_mask);
1055 act.sa_flags = 0;
1056 sigaction(SIGINT, &act, NULL);
1057 act.sa_handler = i9e_signal_dispatch;
1058 sigemptyset(&act.sa_mask);
1059 act.sa_flags = 0;
1060 sigaction(SIGWINCH, &act, NULL);
1061 sched.select_function = i9e_select;
1062
1063 ici.bound_keyseqs = get_mapped_keyseqs();
1064 pt->btrn = ici.producer = btr_new_node(&(struct btr_node_description)
1065 EMBRACE(.name = __FUNCTION__));
1066 ret = i9e_open(&ici, &sched);
1067 if (ret < 0)
1068 goto out;
1069 para_log = i9e_log;
1070 return;
1071 out:
1072 free(history_file);
1073 if (ret >= 0)
1074 return;
1075 PARA_EMERG_LOG("fatal: %s\n", para_strerror(-ret));
1076 exit(EXIT_FAILURE);
1077 }
1078
1079 static void session_update_time_string(struct play_task *pt, char *str, unsigned len)
1080 {
1081 if (pt->background)
1082 return;
1083 if (pt->btrn) {
1084 if (btr_get_output_queue_size(pt->btrn) > 0)
1085 return;
1086 if (btr_get_input_queue_size(pt->btrn) > 0)
1087 return;
1088 }
1089 ie9_print_status_bar(str, len);
1090 }
1091
1092 /*
1093 * If we are about to die we must call i9e_close() to reset the terminal.
1094 * However, i9e_close() must be called in *this* context, i.e. from
1095 * play_task.post_select() rather than from i9e_post_select(), because
1096 * otherwise i9e would access freed memory upon return. So the play task must
1097 * stay alive until the i9e task terminates.
1098 *
1099 * We achieve this by sending a fake SIGTERM signal via i9e_signal_dispatch()
1100 * and reschedule. In the next iteration, i9e->post_select returns an error and
1101 * terminates. Subsequent calls to i9e_get_error() then return negative and we
1102 * are allowed to call i9e_close() and terminate as well.
1103 */
1104 static int session_post_select(__a_unused struct sched *s, struct play_task *pt)
1105 {
1106 int ret;
1107
1108 if (pt->background)
1109 detach_stdout(pt);
1110 else
1111 attach_stdout(pt, __FUNCTION__);
1112 ret = i9e_get_error();
1113 if (ret < 0) {
1114 kill_stream(pt);
1115 i9e_close();
1116 para_log = stderr_log;
1117 free(ici.history_file);
1118 return ret;
1119 }
1120 if (get_playback_state(pt) == 'X')
1121 i9e_signal_dispatch(SIGTERM);
1122 return 0;
1123 }
1124
1125 #else /* HAVE_READLINE */
1126
1127 static int session_post_select(struct sched *s, struct play_task *pt)
1128 {
1129 char c;
1130
1131 if (!FD_ISSET(STDIN_FILENO, &s->rfds))
1132 return 0;
1133 if (read(STDIN_FILENO, &c, 1))
1134 do_nothing;
1135 kill_stream(pt);
1136 return 1;
1137 }
1138
1139 static void session_open(__a_unused struct play_task *pt)
1140 {
1141 }
1142
1143 static void session_update_time_string(__a_unused struct play_task *pt,
1144 char *str, __a_unused unsigned len)
1145 {
1146 printf("\r%s ", str);
1147 fflush(stdout);
1148 }
1149 #endif /* HAVE_READLINE */
1150
1151 static void play_pre_select(struct sched *s, void *context)
1152 {
1153 struct play_task *pt = context;
1154 char state;
1155
1156 para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
1157 state = get_playback_state(pt);
1158 if (state == 'R' || state == 'F' || state == 'X')
1159 return sched_min_delay(s);
1160 sched_request_barrier_or_min_delay(&pt->next_update, s);
1161 }
1162
1163 static unsigned get_time_string(struct play_task *pt, char **result)
1164 {
1165 int seconds, length;
1166 char state = get_playback_state(pt);
1167
1168 /* do not return anything if things are about to change */
1169 if (state != 'P' && state != 'U') {
1170 *result = NULL;
1171 return 0;
1172 }
1173 length = pt->seconds;
1174 if (length == 0)
1175 return xasprintf(result, "0:00 [0:00] (0%%/0:00)");
1176 seconds = get_play_time(pt);
1177 return xasprintf(result, "#%u: %d:%02d [%d:%02d] (%d%%/%d:%02d) %s",
1178 pt->current_file,
1179 seconds / 60,
1180 seconds % 60,
1181 (length - seconds) / 60,
1182 (length - seconds) % 60,
1183 length? (seconds * 100 + length / 2) / length : 0,
1184 length / 60,
1185 length % 60,
1186 conf.inputs[pt->current_file]
1187 );
1188 }
1189
1190 static int play_post_select(struct sched *s, void *context)
1191 {
1192 struct play_task *pt = context;
1193 int ret;
1194
1195 ret = eof_cleanup(pt);
1196 if (ret < 0) {
1197 pt->rq = CRT_TERM_RQ;
1198 return 0;
1199 }
1200 ret = session_post_select(s, pt);
1201 if (ret < 0)
1202 goto out;
1203 if (!pt->wn.btrn && !pt->fn.btrn) {
1204 char state = get_playback_state(pt);
1205 if (state == 'P' || state == 'R' || state == 'F') {
1206 PARA_NOTICE_LOG("state: %c\n", state);
1207 ret = load_next_file(pt);
1208 if (ret < 0) {
1209 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1210 pt->rq = CRT_TERM_RQ;
1211 ret = 1;
1212 goto out;
1213 }
1214 pt->next_update = *now;
1215 }
1216 }
1217 if (tv_diff(now, &pt->next_update, NULL) >= 0) {
1218 char *str;
1219 unsigned len = get_time_string(pt, &str);
1220 struct timeval delay = {.tv_sec = 0, .tv_usec = 100 * 1000};
1221 if (str && len > 0)
1222 session_update_time_string(pt, str, len);
1223 free(str);
1224 tv_add(now, &delay, &pt->next_update);
1225 }
1226 ret = 1;
1227 out:
1228 return ret;
1229 }
1230
1231 /**
1232 * The main function of para_play.
1233 *
1234 * \param argc Standard.
1235 * \param argv Standard.
1236 *
1237 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
1238 */
1239 int main(int argc, char *argv[])
1240 {
1241 int ret;
1242 struct play_task *pt = &play_task;
1243
1244 /* needed this early to make help work */
1245 recv_init();
1246 filter_init();
1247 writer_init();
1248
1249 sched.default_timeout.tv_sec = 5;
1250
1251 parse_config_or_die(argc, argv);
1252 if (conf.inputs_num == 0)
1253 print_help_and_die();
1254 check_afh_receiver_or_die();
1255
1256 session_open(pt);
1257 if (conf.randomize_given)
1258 shuffle(conf.inputs, conf.inputs_num);
1259 pt->invalid = para_calloc(sizeof(*pt->invalid) * conf.inputs_num);
1260 pt->rq = CRT_FILE_CHANGE;
1261 pt->current_file = conf.inputs_num - 1;
1262 pt->playing = true;
1263 pt->task = task_register(&(struct task_info){
1264 .name = "play",
1265 .pre_select = play_pre_select,
1266 .post_select = play_post_select,
1267 .context = pt,
1268 }, &sched);
1269 ret = schedule(&sched);
1270 sched_shutdown(&sched);
1271 if (ret < 0)
1272 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1273 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1274 }