18bfab98ca60a5e3982b6356c76fccc9650a20d8
[paraslash.git] / play.c
1 /*
2 * Copyright (C) 2012-2013 Andre Noll <maan@systemlinux.org>
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 *s = strchr(conf.key_map_arg[i] + 1, ':');
188 if (s)
189 continue;
190 PARA_EMERG_LOG("invalid key map arg: %s\n", conf.key_map_arg[i]);
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 = pt->wn.task.error;
247
248 if (err >= 0)
249 return 0;
250 if (pt->fn.task.error >= 0)
251 return 0;
252 if (pt->rn.task.error >= 0)
253 return 0;
254 if (err == -E_BTR_EOF || err == -E_RECV_EOF || err == -E_EOF
255 || err == -E_WRITE_COMMON_EOF)
256 return 1;
257 return err;
258 }
259
260 static int eof_cleanup(struct play_task *pt)
261 {
262 struct writer *w = writers + DEFAULT_WRITER;
263 struct filter *decoder = filters + pt->fn.filter_num;
264 int ret;
265
266 ret = get_playback_error(pt);
267 if (ret == 0)
268 return ret;
269 PARA_NOTICE_LOG("cleaning up wn/fn nodes\n");
270 w->close(&pt->wn);
271 btr_remove_node(&pt->wn.btrn);
272 w->free_config(pt->wn.conf);
273 memset(&pt->wn, 0, sizeof(struct writer_node));
274
275 decoder->close(&pt->fn);
276 btr_remove_node(&pt->fn.btrn);
277 free(pt->fn.conf);
278 memset(&pt->fn, 0, sizeof(struct filter_node));
279
280 btr_remove_node(&pt->rn.btrn);
281 /*
282 * On eof (ret > 0), we do not wipe the receiver node struct until a
283 * new file is loaded because we still need it for jumping around when
284 * paused.
285 */
286 if (ret < 0)
287 wipe_receiver_node(pt);
288 return ret;
289 }
290
291 static int shuffle_compare(__a_unused const void *a, __a_unused const void *b)
292 {
293 return para_random(100) - 50;
294 }
295
296 static void shuffle(char **base, size_t num)
297 {
298 srandom(now->tv_sec);
299 qsort(base, num, sizeof(char *), shuffle_compare);
300 }
301
302 static struct btr_node *new_recv_btrn(struct receiver_node *rn)
303 {
304 return btr_new_node(&(struct btr_node_description)
305 EMBRACE(.name = afh_recv->name, .context = rn,
306 .handler = afh_recv->execute));
307 }
308
309 static int open_new_file(struct play_task *pt)
310 {
311 int ret;
312 char *tmp, *path = conf.inputs[pt->next_file], *afh_recv_conf[] =
313 {"play", "-f", path, "-b", "0", NULL};
314
315 PARA_NOTICE_LOG("next file: %s\n", path);
316 wipe_receiver_node(pt);
317 pt->start_chunk = 0;
318 pt->rn.btrn = new_recv_btrn(&pt->rn);
319 pt->rn.conf = afh_recv->parse_config(ARRAY_SIZE(afh_recv_conf) - 1,
320 afh_recv_conf);
321 assert(pt->rn.conf);
322 pt->rn.receiver = afh_recv;
323 ret = afh_recv->open(&pt->rn);
324 if (ret < 0) {
325 PARA_ERROR_LOG("could not open %s: %s\n", path,
326 para_strerror(-ret));
327 goto fail;
328 }
329 pt->audio_format_num = ret;
330 free(pt->afhi_txt);
331 ret = btr_exec_up(pt->rn.btrn, "afhi", &pt->afhi_txt);
332 if (ret < 0)
333 pt->afhi_txt = make_message("[afhi command failed]\n");
334 ret = btr_exec_up(pt->rn.btrn, "seconds_total", &tmp);
335 if (ret < 0)
336 pt->seconds = 1;
337 else {
338 int32_t x;
339 ret = para_atoi32(tmp, &x);
340 pt->seconds = ret < 0? 1 : x;
341 free(tmp);
342 tmp = NULL;
343 }
344 ret = btr_exec_up(pt->rn.btrn, "chunks_total", &tmp);
345 if (ret < 0)
346 pt->num_chunks = 1;
347 else {
348 int32_t x;
349 ret = para_atoi32(tmp, &x);
350 pt->num_chunks = ret < 0? 1 : x;
351 free(tmp);
352 tmp = NULL;
353 }
354 pt->rn.task.pre_select = afh_recv->pre_select;
355 pt->rn.task.post_select = afh_recv->post_select;
356 sprintf(pt->rn.task.status, "%s receiver node", afh_recv->name);
357 return 1;
358 fail:
359 wipe_receiver_node(pt);
360 return ret;
361 }
362
363 static int load_file(struct play_task *pt)
364 {
365 const char *af;
366 char *tmp;
367 int ret;
368 struct filter *decoder;
369
370 btr_remove_node(&pt->rn.btrn);
371 if (!pt->rn.receiver || pt->next_file != pt->current_file) {
372 ret = open_new_file(pt);
373 if (ret < 0)
374 return ret;
375 } else {
376 char buf[20];
377 pt->rn.btrn = new_recv_btrn(&pt->rn);
378 sprintf(buf, "repos %lu", pt->start_chunk);
379 ret = btr_exec_up(pt->rn.btrn, buf, &tmp);
380 if (ret < 0)
381 PARA_CRIT_LOG("repos failed: %s\n", para_strerror(-ret));
382 freep(&tmp);
383 }
384 if (!pt->playing)
385 return 0;
386 /* set up decoding filter */
387 af = audio_format_name(pt->audio_format_num);
388 tmp = make_message("%sdec", af);
389 ret = check_filter_arg(tmp, &pt->fn.conf);
390 freep(&tmp);
391 if (ret < 0)
392 goto fail;
393 pt->fn.filter_num = ret;
394 decoder = filters + ret;
395 pt->fn.task.pre_select = decoder->pre_select;
396 pt->fn.task.post_select = decoder->post_select;
397 sprintf(pt->fn.task.status, "%s decoder", af);
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 pt->wn.task.error = 0;
406
407 /* success, register tasks */
408 register_task(&sched, &pt->rn.task);
409 register_task(&sched, &pt->fn.task);
410 register_writer_node(&pt->wn, pt->fn.btrn, &sched);
411 return 1;
412 fail:
413 wipe_receiver_node(pt);
414 return ret;
415 }
416
417 static int next_valid_file(struct play_task *pt)
418 {
419 int i, j = pt->current_file;
420
421 FOR_EACH_PLAYLIST_FILE(i) {
422 j = (j + 1) % conf.inputs_num;
423 if (!pt->invalid[j])
424 return j;
425 }
426 return -E_NO_VALID_FILES;
427 }
428
429 static int load_next_file(struct play_task *pt)
430 {
431 int ret;
432
433 again:
434 if (pt->rq == CRT_NONE) {
435 pt->start_chunk = 0;
436 ret = next_valid_file(pt);
437 if (ret < 0)
438 return ret;
439 pt->next_file = ret;
440 } else if (pt->rq == CRT_REPOS)
441 pt->next_file = pt->current_file;
442 ret = load_file(pt);
443 if (ret < 0) {
444 pt->invalid[pt->next_file] = true;
445 pt->rq = CRT_NONE;
446 goto again;
447 }
448 pt->current_file = pt->next_file;
449 pt->rq = CRT_NONE;
450 return ret;
451 }
452
453 static void kill_stream(struct play_task *pt)
454 {
455 task_notify(&pt->wn.task, E_EOF);
456 }
457
458 #ifdef HAVE_READLINE
459
460 /* only called from com_prev(), nec. only if we have readline */
461 static int previous_valid_file(struct play_task *pt)
462 {
463 int i, j = pt->current_file;
464
465 FOR_EACH_PLAYLIST_FILE(i) {
466 j--;
467 if (j < 0)
468 j = conf.inputs_num - 1;
469 if (!pt->invalid[j])
470 return j;
471 }
472 return -E_NO_VALID_FILES;
473 }
474
475 #include "interactive.h"
476
477 /*
478 * Define the default (internal) key mappings and helper functions to get the
479 * key sequence or the command from a key id, which is what we obtain from
480 * i9e/readline when the key is pressed.
481 *
482 * In some of these helper functions we could return pointers to the constant
483 * arrays defined below. However, for others we can not, so let's better be
484 * consistent and allocate all returned strings on the heap.
485 */
486
487 #define INTERNAL_KEYMAP_ENTRIES \
488 KEYMAP_ENTRY("^", "jmp 0"), \
489 KEYMAP_ENTRY("1", "jmp 10"), \
490 KEYMAP_ENTRY("2", "jmp 21"), \
491 KEYMAP_ENTRY("3", "jmp 32"), \
492 KEYMAP_ENTRY("4", "jmp 43"), \
493 KEYMAP_ENTRY("5", "jmp 54"), \
494 KEYMAP_ENTRY("6", "jmp 65"), \
495 KEYMAP_ENTRY("7", "jmp 76"), \
496 KEYMAP_ENTRY("8", "jmp 87"), \
497 KEYMAP_ENTRY("9", "jmp 98"), \
498 KEYMAP_ENTRY("+", "next"), \
499 KEYMAP_ENTRY("-", "prev"), \
500 KEYMAP_ENTRY(":", "bg"), \
501 KEYMAP_ENTRY("i", "info"), \
502 KEYMAP_ENTRY("l", "ls"), \
503 KEYMAP_ENTRY("s", "play"), \
504 KEYMAP_ENTRY("p", "pause"), \
505 KEYMAP_ENTRY("q", "quit"), \
506 KEYMAP_ENTRY("?", "help"), \
507 KEYMAP_ENTRY("\033[D", "ff -10"), \
508 KEYMAP_ENTRY("\033[C", "ff 10"), \
509 KEYMAP_ENTRY("\033[A", "ff 60"), \
510 KEYMAP_ENTRY("\033[B", "ff -60"), \
511
512 #define KEYMAP_ENTRY(a, b) a
513 static const char *default_keyseqs[] = {INTERNAL_KEYMAP_ENTRIES};
514 #undef KEYMAP_ENTRY
515 #define KEYMAP_ENTRY(a, b) b
516 static const char *default_commands[] = {INTERNAL_KEYMAP_ENTRIES};
517 #undef KEYMAP_ENTRY
518 #define NUM_INTERNALLY_MAPPED_KEYS ARRAY_SIZE(default_commands)
519 #define NUM_MAPPED_KEYS (NUM_INTERNALLY_MAPPED_KEYS + conf.key_map_given)
520 #define FOR_EACH_MAPPED_KEY(i) for (i = 0; i < NUM_MAPPED_KEYS; i++)
521
522 static inline bool is_internal_key(int key)
523 {
524 return key < NUM_INTERNALLY_MAPPED_KEYS;
525 }
526
527 /* for internal keys, the key id is just the array index. */
528 static inline int get_internal_key_map_idx(int key)
529 {
530 assert(is_internal_key(key));
531 return key;
532 }
533
534 /*
535 * For user-defined keys, we have to subtract NUM_INTERNALLY_MAPPED_KEYS. The
536 * difference is the index to the array of user defined key maps.
537 */
538 static inline int get_user_key_map_idx(int key)
539 {
540 assert(!is_internal_key(key));
541 return key - NUM_INTERNALLY_MAPPED_KEYS;
542 }
543
544 static inline int get_key_map_idx(int key)
545 {
546 return is_internal_key(key)?
547 get_internal_key_map_idx(key) : get_user_key_map_idx(key);
548 }
549
550 static inline char *get_user_key_map_arg(int key)
551 {
552 return conf.key_map_arg[get_user_key_map_idx(key)];
553 }
554
555 static inline char *get_internal_key_map_seq(int key)
556 {
557 return para_strdup(default_keyseqs[get_internal_key_map_idx(key)]);
558 }
559
560 static char *get_user_key_map_seq(int key)
561 {
562 const char *kma = get_user_key_map_arg(key);
563 const char *p = strchr(kma + 1, ':');
564 char *result;
565 int len;
566
567 if (!p)
568 return NULL;
569 len = p - kma;
570 result = para_malloc(len + 1);
571 memcpy(result, kma, len);
572 result[len] = '\0';
573 return result;
574 }
575
576 static char *get_key_map_seq(int key)
577 {
578 return is_internal_key(key)?
579 get_internal_key_map_seq(key) : get_user_key_map_seq(key);
580 }
581
582 static inline char *get_internal_key_map_cmd(int key)
583 {
584 return para_strdup(default_commands[get_internal_key_map_idx(key)]);
585 }
586
587 static char *get_user_key_map_cmd(int key)
588 {
589 const char *kma = get_user_key_map_arg(key);
590 const char *p = strchr(kma + 1, ':');
591
592 if (!p)
593 return NULL;
594 return para_strdup(p + 1);
595 }
596
597 static char *get_key_map_cmd(int key)
598 {
599 return is_internal_key(key)?
600 get_internal_key_map_cmd(key) : get_user_key_map_cmd(key);
601 }
602
603 static char **get_mapped_keyseqs(void)
604 {
605 char **result;
606 int i;
607
608 result = para_malloc((NUM_MAPPED_KEYS + 1) * sizeof(char *));
609 FOR_EACH_MAPPED_KEY(i) {
610 int idx = get_key_map_idx(i);
611 char *seq = get_key_map_seq(i);
612 char *cmd = get_key_map_cmd(i);
613 bool internal = is_internal_key(i);
614 PARA_DEBUG_LOG("%s key sequence #%d: %s -> %s\n",
615 internal? "internal" : "user-defined",
616 idx, seq, cmd);
617 result[i] = seq;
618 free(cmd);
619 }
620 result[i] = NULL;
621 return result;
622 }
623
624 #include "play_completion.h"
625
626
627 /* defines one command of para_play */
628 struct pp_command {
629 const char *name;
630 int (*handler)(struct play_task *, int, char**);
631 const char *description;
632 const char *usage;
633 const char *help;
634 };
635
636 #include "play_command_list.h"
637 static struct pp_command pp_cmds[] = {DEFINE_PLAY_CMD_ARRAY};
638 #define FOR_EACH_COMMAND(c) for (c = 0; pp_cmds[c].name; c++)
639
640 #include "play_completion.h"
641 static struct i9e_completer pp_completers[];
642
643 I9E_DUMMY_COMPLETER(jmp);
644 I9E_DUMMY_COMPLETER(next);
645 I9E_DUMMY_COMPLETER(prev);
646 I9E_DUMMY_COMPLETER(fg);
647 I9E_DUMMY_COMPLETER(bg);
648 I9E_DUMMY_COMPLETER(ls);
649 I9E_DUMMY_COMPLETER(info);
650 I9E_DUMMY_COMPLETER(play);
651 I9E_DUMMY_COMPLETER(pause);
652 I9E_DUMMY_COMPLETER(stop);
653 I9E_DUMMY_COMPLETER(tasks);
654 I9E_DUMMY_COMPLETER(quit);
655 I9E_DUMMY_COMPLETER(ff);
656
657 static void help_completer(struct i9e_completion_info *ci,
658 struct i9e_completion_result *result)
659 {
660 result->matches = i9e_complete_commands(ci->word, pp_completers);
661 }
662
663 static struct i9e_completer pp_completers[] = {PLAY_COMPLETERS {.name = NULL}};
664
665 static void attach_stdout(struct play_task *pt, const char *name)
666 {
667 if (pt->btrn)
668 return;
669 pt->btrn = btr_new_node(&(struct btr_node_description)
670 EMBRACE(.name = name));
671 i9e_attach_to_stdout(pt->btrn);
672 }
673
674 static void detach_stdout(struct play_task *pt)
675 {
676 btr_remove_node(&pt->btrn);
677 }
678
679 static int com_quit(struct play_task *pt, int argc, __a_unused char **argv)
680 {
681 if (argc != 1)
682 return -E_PLAY_SYNTAX;
683 pt->rq = CRT_TERM_RQ;
684 return 0;
685 }
686
687 static int com_help(struct play_task *pt, int argc, char **argv)
688 {
689 int i;
690 char *buf;
691 size_t sz;
692
693 if (argc > 2)
694 return -E_PLAY_SYNTAX;
695 if (argc < 2) {
696 if (pt->background)
697 FOR_EACH_COMMAND(i) {
698 sz = xasprintf(&buf, "%s\t%s\n", pp_cmds[i].name,
699 pp_cmds[i].description);
700 btr_add_output(buf, sz, pt->btrn);
701 }
702 else {
703 FOR_EACH_MAPPED_KEY(i) {
704 bool internal = is_internal_key(i);
705 int idx = get_key_map_idx(i);
706 char *seq = get_key_map_seq(i);
707 char *cmd = get_key_map_cmd(i);
708 sz = xasprintf(&buf,
709 "%s key #%d: %s -> %s\n",
710 internal? "internal" : "user-defined",
711 idx, seq, cmd);
712 btr_add_output(buf, sz, pt->btrn);
713 free(seq);
714 free(cmd);
715 }
716 }
717 return 0;
718 }
719 FOR_EACH_COMMAND(i) {
720 if (strcmp(pp_cmds[i].name, argv[1]))
721 continue;
722 sz = xasprintf(&buf,
723 "NAME\n\t%s -- %s\n"
724 "SYNOPSIS\n\t%s\n"
725 "DESCRIPTION\n%s\n",
726 argv[1],
727 pp_cmds[i].description,
728 pp_cmds[i].usage,
729 pp_cmds[i].help
730 );
731 btr_add_output(buf, sz, pt->btrn);
732 return 0;
733 }
734 return -E_BAD_PLAY_CMD;
735 }
736
737 static int com_info(struct play_task *pt, int argc, __a_unused char **argv)
738 {
739 char *buf;
740 size_t sz;
741 static char dflt[] = "[no information available]";
742
743 if (argc != 1)
744 return -E_PLAY_SYNTAX;
745 sz = xasprintf(&buf, "playlist_pos: %u\npath: %s\n",
746 pt->current_file, conf.inputs[pt->current_file]);
747 btr_add_output(buf, sz, pt->btrn);
748 buf = pt->afhi_txt? pt->afhi_txt : dflt;
749 btr_add_output_dont_free(buf, strlen(buf), pt->btrn);
750 return 0;
751 }
752
753 static void list_file(struct play_task *pt, int num)
754 {
755 char *buf;
756 size_t sz;
757
758 sz = xasprintf(&buf, "%s %4u %s\n", num == pt->current_file?
759 "*" : " ", num, conf.inputs[num]);
760 btr_add_output(buf, sz, pt->btrn);
761 }
762
763 static int com_tasks(struct play_task *pt, int argc, __a_unused char **argv)
764 {
765 static char state;
766 char *buf;
767 size_t sz;
768
769 if (argc != 1)
770 return -E_PLAY_SYNTAX;
771
772 buf = get_task_list(&sched);
773 btr_add_output(buf, strlen(buf), pt->btrn);
774 state = get_playback_state(pt);
775 sz = xasprintf(&buf, "state: %c\n", state);
776 btr_add_output(buf, sz, pt->btrn);
777 return 0;
778 }
779
780 static int com_ls(struct play_task *pt, int argc, char **argv)
781 {
782 int i, j, ret;
783
784 if (argc == 1) {
785 FOR_EACH_PLAYLIST_FILE(i)
786 list_file(pt, i);
787 return 0;
788 }
789 for (j = 1; j < argc; j++) {
790 FOR_EACH_PLAYLIST_FILE(i) {
791 ret = fnmatch(argv[j], conf.inputs[i], 0);
792 if (ret == 0) /* match */
793 list_file(pt, i);
794 }
795 }
796 return 0;
797 }
798
799 static int com_play(struct play_task *pt, int argc, char **argv)
800 {
801 int32_t x;
802 int ret;
803 char state;
804
805 if (argc > 2)
806 return -E_PLAY_SYNTAX;
807 state = get_playback_state(pt);
808 if (argc == 1) {
809 if (state == 'P')
810 return 0;
811 pt->next_file = pt->current_file;
812 pt->rq = CRT_REPOS;
813 pt->playing = true;
814 return 0;
815 }
816 ret = para_atoi32(argv[1], &x);
817 if (ret < 0)
818 return ret;
819 if (x < 0 || x >= conf.inputs_num)
820 return -ERRNO_TO_PARA_ERROR(EINVAL);
821 kill_stream(pt);
822 pt->next_file = x;
823 pt->rq = CRT_FILE_CHANGE;
824 return 0;
825 }
826
827 static int com_pause(struct play_task *pt, int argc, __a_unused char **argv)
828 {
829 char state;
830 long unsigned seconds, ss;
831
832 if (argc != 1)
833 return -E_PLAY_SYNTAX;
834 state = get_playback_state(pt);
835 pt->playing = false;
836 if (state != 'P')
837 return 0;
838 seconds = get_play_time(pt);
839 pt->playing = false;
840 ss = 0;
841 if (pt->seconds > 0)
842 ss = seconds * pt->num_chunks / pt->seconds + 1;
843 ss = PARA_MAX(ss, 0UL);
844 ss = PARA_MIN(ss, pt->num_chunks);
845 pt->start_chunk = ss;
846 kill_stream(pt);
847 return 0;
848 }
849
850 static int com_prev(struct play_task *pt, int argc, __a_unused char **argv)
851
852 {
853 int ret;
854
855 if (argc != 1)
856 return -E_PLAY_SYNTAX;
857 ret = previous_valid_file(pt);
858 if (ret < 0)
859 return ret;
860 kill_stream(pt);
861 pt->next_file = ret;
862 pt->rq = CRT_FILE_CHANGE;
863 pt->start_chunk = 0;
864 return 0;
865 }
866
867 static int com_next(struct play_task *pt, int argc, __a_unused char **argv)
868 {
869 int ret;
870
871 if (argc != 1)
872 return -E_PLAY_SYNTAX;
873 ret = next_valid_file(pt);
874 if (ret < 0)
875 return ret;
876 kill_stream(pt);
877 pt->next_file = ret;
878 pt->rq = CRT_FILE_CHANGE;
879 pt->start_chunk = 0;
880 return 0;
881 }
882
883 static int com_fg(struct play_task *pt, int argc, __a_unused char **argv)
884 {
885 if (argc != 1)
886 return -E_PLAY_SYNTAX;
887 pt->background = false;
888 return 0;
889 }
890
891 static int com_bg(struct play_task *pt, int argc, __a_unused char **argv)
892 {
893 if (argc != 1)
894 return -E_PLAY_SYNTAX;
895 pt->background = true;
896 return 0;
897 }
898
899 static int com_jmp(struct play_task *pt, int argc, char **argv)
900 {
901 int32_t percent;
902 int ret;
903
904 if (argc != 2)
905 return -E_PLAY_SYNTAX;
906 ret = para_atoi32(argv[1], &percent);
907 if (ret < 0)
908 return ret;
909 if (percent < 0 || percent > 100)
910 return -ERRNO_TO_PARA_ERROR(EINVAL);
911 if (pt->playing && !pt->fn.btrn)
912 return 0;
913 pt->start_chunk = percent * pt->num_chunks / 100;
914 if (!pt->playing)
915 return 0;
916 pt->rq = CRT_REPOS;
917 kill_stream(pt);
918 return 0;
919 }
920
921 static int com_ff(struct play_task *pt, int argc, char **argv)
922 {
923 int32_t seconds;
924 int ret;
925
926 if (argc != 2)
927 return -E_PLAY_SYNTAX;
928 ret = para_atoi32(argv[1], &seconds);
929 if (ret < 0)
930 return ret;
931 if (pt->playing && !pt->fn.btrn)
932 return 0;
933 seconds += get_play_time(pt);
934 seconds = PARA_MIN(seconds, (typeof(seconds))pt->seconds - 4);
935 seconds = PARA_MAX(seconds, 0);
936 pt->start_chunk = pt->num_chunks * seconds / pt->seconds;
937 pt->start_chunk = PARA_MIN(pt->start_chunk, pt->num_chunks - 1);
938 pt->start_chunk = PARA_MAX(pt->start_chunk, 0UL);
939 if (!pt->playing)
940 return 0;
941 pt->rq = CRT_REPOS;
942 kill_stream(pt);
943 return 0;
944 }
945
946 static int run_command(char *line, struct play_task *pt)
947 {
948 int i, ret, argc;
949 char **argv = NULL;
950
951 attach_stdout(pt, __FUNCTION__);
952 ret = create_argv(line, " ", &argv);
953 if (ret < 0) {
954 PARA_ERROR_LOG("parse error: %s\n", para_strerror(-ret));
955 return 0;
956 }
957 if (ret == 0)
958 goto out;
959 argc = ret;
960 FOR_EACH_COMMAND(i) {
961 if (strcmp(pp_cmds[i].name, argv[0]))
962 continue;
963 ret = pp_cmds[i].handler(pt, argc, argv);
964 if (ret < 0)
965 PARA_WARNING_LOG("%s: %s\n", pt->background?
966 "" : argv[0], para_strerror(-ret));
967 ret = 1;
968 goto out;
969 }
970 PARA_WARNING_LOG("invalid command: %s\n", argv[0]);
971 ret = 0;
972 out:
973 free_argv(argv);
974 return ret;
975 }
976
977 static int play_i9e_line_handler(char *line)
978 {
979 return run_command(line, &play_task);
980 }
981
982 static int play_i9e_key_handler(int key)
983 {
984 struct play_task *pt = &play_task;
985 int idx = get_key_map_idx(key);
986 char *seq = get_key_map_seq(key);
987 char *cmd = get_key_map_cmd(key);
988 bool internal = is_internal_key(key);
989
990 PARA_NOTICE_LOG("pressed %d: %s key #%d (%s -> %s)\n",
991 key, internal? "internal" : "user-defined",
992 idx, seq, cmd);
993 run_command(cmd, pt);
994 free(seq);
995 free(cmd);
996 pt->next_update = *now;
997 return 0;
998 }
999
1000 static struct i9e_client_info ici = {
1001 .fds = {0, 1, 2},
1002 .prompt = "para_play> ",
1003 .line_handler = play_i9e_line_handler,
1004 .key_handler = play_i9e_key_handler,
1005 .completers = pp_completers,
1006 };
1007
1008 static void sigint_handler(int sig)
1009 {
1010 play_task.background = true;
1011 i9e_signal_dispatch(sig);
1012 }
1013
1014 /*
1015 * We start with para_log() set to the standard log function which writes to
1016 * stderr. Once the i9e subsystem has been initialized, we switch to the i9e
1017 * log facility.
1018 */
1019 static void session_open(__a_unused struct play_task *pt)
1020 {
1021 int ret;
1022 char *history_file;
1023 struct sigaction act;
1024
1025 PARA_NOTICE_LOG("\n%s\n", version_text("play"));
1026 if (conf.history_file_given)
1027 history_file = para_strdup(conf.history_file_arg);
1028 else {
1029 char *home = para_homedir();
1030 history_file = make_message("%s/.paraslash/play.history",
1031 home);
1032 free(home);
1033 }
1034 ici.history_file = history_file;
1035 ici.loglevel = loglevel;
1036
1037 act.sa_handler = sigint_handler;
1038 sigemptyset(&act.sa_mask);
1039 act.sa_flags = 0;
1040 sigaction(SIGINT, &act, NULL);
1041 act.sa_handler = i9e_signal_dispatch;
1042 sigemptyset(&act.sa_mask);
1043 act.sa_flags = 0;
1044 sigaction(SIGWINCH, &act, NULL);
1045 sched.select_function = i9e_select;
1046
1047 ici.bound_keyseqs = get_mapped_keyseqs();
1048 pt->btrn = ici.producer = btr_new_node(&(struct btr_node_description)
1049 EMBRACE(.name = __FUNCTION__));
1050 ret = i9e_open(&ici, &sched);
1051 if (ret < 0)
1052 goto out;
1053 para_log = i9e_log;
1054 return;
1055 out:
1056 free(history_file);
1057 if (ret >= 0)
1058 return;
1059 PARA_EMERG_LOG("fatal: %s\n", para_strerror(-ret));
1060 exit(EXIT_FAILURE);
1061 }
1062
1063 static void session_update_time_string(struct play_task *pt, char *str, unsigned len)
1064 {
1065 if (pt->background)
1066 return;
1067 if (pt->btrn) {
1068 if (btr_get_output_queue_size(pt->btrn) > 0)
1069 return;
1070 if (btr_get_input_queue_size(pt->btrn) > 0)
1071 return;
1072 }
1073 ie9_print_status_bar(str, len);
1074 }
1075
1076 /*
1077 * If we are about to die we must call i9e_close() to reset the terminal.
1078 * However, i9e_close() must be called in *this* context, i.e. from
1079 * play_task.post_select() rather than from i9e_post_select(), because
1080 * otherwise i9e would access freed memory upon return. So the play task must
1081 * stay alive until the i9e task terminates.
1082 *
1083 * We achieve this by sending a fake SIGTERM signal via i9e_signal_dispatch()
1084 * and reschedule. In the next iteration, i9e->post_select returns an error and
1085 * terminates. Subsequent calls to i9e_get_error() then return negative and we
1086 * are allowed to call i9e_close() and terminate as well.
1087 */
1088 static int session_post_select(__a_unused struct sched *s, struct task *t)
1089 {
1090 struct play_task *pt = container_of(t, struct play_task, task);
1091 int ret;
1092
1093 if (pt->background)
1094 detach_stdout(pt);
1095 else
1096 attach_stdout(pt, __FUNCTION__);
1097 ret = i9e_get_error();
1098 if (ret < 0) {
1099 kill_stream(pt);
1100 i9e_close();
1101 para_log = stderr_log;
1102 free(ici.history_file);
1103 return ret;
1104 }
1105 if (get_playback_state(pt) == 'X')
1106 i9e_signal_dispatch(SIGTERM);
1107 return 0;
1108 }
1109
1110 #else /* HAVE_READLINE */
1111
1112 static int session_post_select(struct sched *s, struct task *t)
1113 {
1114 struct play_task *pt = container_of(t, struct play_task, task);
1115 char c;
1116
1117 if (!FD_ISSET(STDIN_FILENO, &s->rfds))
1118 return 0;
1119 if (read(STDIN_FILENO, &c, 1))
1120 do_nothing;
1121 kill_stream(pt);
1122 return 1;
1123 }
1124
1125 static void session_open(__a_unused struct play_task *pt)
1126 {
1127 }
1128
1129 static void session_update_time_string(__a_unused struct play_task *pt,
1130 char *str, __a_unused unsigned len)
1131 {
1132 printf("\r%s ", str);
1133 fflush(stdout);
1134 }
1135 #endif /* HAVE_READLINE */
1136
1137 static void play_pre_select(struct sched *s, struct task *t)
1138 {
1139 struct play_task *pt = container_of(t, struct play_task, task);
1140 char state;
1141
1142 para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
1143 state = get_playback_state(pt);
1144 if (state == 'R' || state == 'F' || state == 'X')
1145 return sched_min_delay(s);
1146 sched_request_barrier_or_min_delay(&pt->next_update, s);
1147 }
1148
1149 static unsigned get_time_string(struct play_task *pt, char **result)
1150 {
1151 int seconds, length;
1152 char state = get_playback_state(pt);
1153
1154 /* do not return anything if things are about to change */
1155 if (state != 'P' && state != 'U') {
1156 *result = NULL;
1157 return 0;
1158 }
1159 length = pt->seconds;
1160 if (length == 0)
1161 return xasprintf(result, "0:00 [0:00] (0%%/0:00)");
1162 seconds = get_play_time(pt);
1163 return xasprintf(result, "#%u: %d:%02d [%d:%02d] (%d%%/%d:%02d) %s",
1164 pt->current_file,
1165 seconds / 60,
1166 seconds % 60,
1167 (length - seconds) / 60,
1168 (length - seconds) % 60,
1169 length? (seconds * 100 + length / 2) / length : 0,
1170 length / 60,
1171 length % 60,
1172 conf.inputs[pt->current_file]
1173 );
1174 }
1175
1176 static int play_post_select(struct sched *s, struct task *t)
1177 {
1178 struct play_task *pt = container_of(t, struct play_task, task);
1179 int ret;
1180
1181 ret = eof_cleanup(pt);
1182 if (ret < 0) {
1183 pt->rq = CRT_TERM_RQ;
1184 return 0;
1185 }
1186 ret = session_post_select(s, t);
1187 if (ret < 0)
1188 goto out;
1189 if (!pt->wn.btrn && !pt->fn.btrn) {
1190 char state = get_playback_state(pt);
1191 if (state == 'P' || state == 'R' || state == 'F') {
1192 PARA_NOTICE_LOG("state: %c\n", state);
1193 ret = load_next_file(pt);
1194 if (ret < 0) {
1195 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1196 pt->rq = CRT_TERM_RQ;
1197 ret = 1;
1198 goto out;
1199 }
1200 pt->next_update = *now;
1201 }
1202 }
1203 if (tv_diff(now, &pt->next_update, NULL) >= 0) {
1204 char *str;
1205 unsigned len = get_time_string(pt, &str);
1206 struct timeval delay = {.tv_sec = 0, .tv_usec = 100 * 1000};
1207 if (str && len > 0)
1208 session_update_time_string(pt, str, len);
1209 free(str);
1210 tv_add(now, &delay, &pt->next_update);
1211 }
1212 ret = 1;
1213 out:
1214 return ret;
1215 }
1216
1217 /**
1218 * The main function of para_play.
1219 *
1220 * \param argc Standard.
1221 * \param argv Standard.
1222 *
1223 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
1224 */
1225 int main(int argc, char *argv[])
1226 {
1227 int ret;
1228 struct play_task *pt = &play_task;
1229
1230 /* needed this early to make help work */
1231 recv_init();
1232 filter_init();
1233 writer_init();
1234
1235 clock_get_realtime(now);
1236 sched.default_timeout.tv_sec = 5;
1237
1238 parse_config_or_die(argc, argv);
1239 if (conf.inputs_num == 0)
1240 print_help_and_die();
1241 check_afh_receiver_or_die();
1242
1243 session_open(pt);
1244 if (conf.randomize_given)
1245 shuffle(conf.inputs, conf.inputs_num);
1246 pt->invalid = para_calloc(sizeof(*pt->invalid) * conf.inputs_num);
1247 pt->rq = CRT_FILE_CHANGE;
1248 pt->current_file = conf.inputs_num - 1;
1249 pt->playing = true;
1250 pt->task.pre_select = play_pre_select;
1251 pt->task.post_select = play_post_select;
1252 sprintf(pt->task.status, "play task");
1253 register_task(&sched, &pt->task);
1254 ret = schedule(&sched);
1255 if (ret < 0)
1256 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1257 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1258 }