d2539ee134773614a40bca9941f35dd161007946
[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 "error.h"
17 #include "ggo.h"
18 #include "buffer_tree.h"
19 #include "version.h"
20 #include "string.h"
21 #include "sched.h"
22 #include "filter.h"
23 #include "afh.h"
24 #include "recv.h"
25 #include "write.h"
26 #include "write_common.h"
27 #include "fd.h"
28
29 /**
30 * Besides playback tasks which correspond to the receiver/filter/writer nodes,
31 * para_play creates two further tasks: The play task and the i9e task. It is
32 * important whether a function can be called in the context of para_play or
33 * i9e or both. As a rule, all command handlers are called only in i9e context via
34 * the line handler (input mode) or the key handler (command mode) below.
35 *
36 * Playlist handling is done exclusively in play context.
37 */
38
39 /**
40 * Describes a request to change the state of para_play.
41 *
42 * There is only one variable of this type: \a rq of the global play task
43 * structure. Command handlers only set this variable and the post_select()
44 * function of the play task investigates its value during each iteration of
45 * the scheduler run and performs the actual work.
46 */
47 enum state_change_request_type {
48 /** Everybody is happy. */
49 CRT_NONE,
50 /** Stream must be repositioned (com_jmp(), com_ff()). */
51 CRT_REPOS,
52 /** New file should be loaded (com_next()). */
53 CRT_FILE_CHANGE,
54 /** Someone wants us for dead (com_quit()). */
55 CRT_TERM_RQ
56 };
57
58 struct play_task {
59 struct task *task;
60 /* A bit array of invalid files (those will be skipped). */
61 bool *invalid;
62 /* The file which is currently open. */
63 unsigned current_file;
64 /* When to update the status again. */
65 struct timeval next_update;
66
67 /* Root of the buffer tree for command and status output. */
68 struct btr_node *btrn;
69
70 /* The decoding machinery. */
71 struct receiver_node rn;
72 struct filter_node fn;
73 struct writer_node wn;
74
75 /* See comment to enum state_change_request_type above */
76 enum state_change_request_type rq;
77 /* only relevant if rq == CRT_FILE_CHANGE */
78 unsigned next_file;
79 /*
80 bg: read lines at prompt, fg: display status and wait
81 for keystroke.
82 */
83 bool background;
84
85 /* We have the *intention* to play. Set by com_play(). */
86 bool playing;
87
88 /* as returned by afh_recv->open() */
89 int audio_format_num;
90
91 /* retrieved via the btr exec mechanism */
92 long unsigned start_chunk;
93 long unsigned seconds;
94 long unsigned num_chunks;
95 char *afhi_txt;
96 };
97
98 /** Initialize the array of errors for para_play. */
99 INIT_PLAY_ERRLISTS;
100
101 /* Activate the afh receiver. */
102 extern void afh_recv_init(struct receiver *r);
103 #undef AFH_RECEIVER
104 /** Initialization code for a receiver struct. */
105 #define AFH_RECEIVER {.name = "afh", .init = afh_recv_init},
106 /** This expands to the array of all receivers. */
107 DEFINE_RECEIVER_ARRAY;
108
109 static int loglevel = LL_WARNING;
110
111 /** The log function which writes log messages to stderr. */
112 INIT_STDERR_LOGGING(loglevel);
113
114 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
115
116 /** Iterate over all files in the playlist. */
117 #define FOR_EACH_PLAYLIST_FILE(i) for (i = 0; i < conf.inputs_num; i++)
118 static struct play_args_info conf;
119
120 static struct sched sched = {.max_fileno = 0};
121 static struct play_task play_task;
122 static struct receiver *afh_recv;
123
124 static void check_afh_receiver_or_die(void)
125 {
126 int i;
127
128 FOR_EACH_RECEIVER(i) {
129 struct receiver *r = receivers + i;
130 if (strcmp(r->name, "afh"))
131 continue;
132 afh_recv = r;
133 return;
134 }
135 PARA_EMERG_LOG("fatal: afh receiver not found\n");
136 exit(EXIT_FAILURE);
137 }
138
139 __noreturn static void print_help_and_die(void)
140 {
141 struct ggo_help help = DEFINE_GGO_HELP(play);
142 unsigned flags = conf.detailed_help_given?
143 GPH_STANDARD_FLAGS_DETAILED : GPH_STANDARD_FLAGS;
144
145 ggo_print_help(&help, flags);
146 printf("supported audio formats: %s\n", AUDIO_FORMAT_HANDLERS);
147 exit(0);
148 }
149
150 static void parse_config_or_die(int argc, char *argv[])
151 {
152 int i, ret;
153 char *config_file;
154 struct play_cmdline_parser_params params = {
155 .override = 0,
156 .initialize = 1,
157 .check_required = 0,
158 .check_ambiguity = 0,
159 .print_errors = 1
160 };
161
162 play_cmdline_parser_ext(argc, argv, &conf, &params);
163 loglevel = get_loglevel_by_name(conf.loglevel_arg);
164 version_handle_flag("play", conf.version_given);
165 if (conf.help_given || conf.detailed_help_given)
166 print_help_and_die();
167 if (conf.config_file_given)
168 config_file = para_strdup(conf.config_file_arg);
169 else {
170 char *home = para_homedir();
171 config_file = make_message("%s/.paraslash/play.conf", home);
172 free(home);
173 }
174 ret = file_exists(config_file);
175 if (conf.config_file_given && !ret) {
176 PARA_EMERG_LOG("can not read config file %s\n", config_file);
177 goto err;
178 }
179 if (ret) {
180 params.initialize = 0;
181 params.check_required = 1;
182 play_cmdline_parser_config_file(config_file, &conf, &params);
183 loglevel = get_loglevel_by_name(conf.loglevel_arg);
184 }
185 for (i = 0; i < conf.key_map_given; i++) {
186 char *kma = conf.key_map_arg[i];
187 if (*kma && strchr(kma + 1, ':'))
188 continue;
189 PARA_EMERG_LOG("invalid key map arg: %s\n", kma);
190 goto err;
191 }
192 free(config_file);
193 return;
194 err:
195 free(config_file);
196 exit(EXIT_FAILURE);
197 }
198
199 static char get_playback_state(struct play_task *pt)
200 {
201 switch (pt->rq) {
202 case CRT_NONE: return pt->playing? 'P' : 'U';
203 case CRT_REPOS: return 'R';
204 case CRT_FILE_CHANGE: return 'F';
205 case CRT_TERM_RQ: return 'X';
206 }
207 assert(false);
208 };
209
210 static long unsigned get_play_time(struct play_task *pt)
211 {
212 char state = get_playback_state(pt);
213 long unsigned result;
214
215 if (state != 'P' && state != 'U')
216 return 0;
217 if (pt->num_chunks == 0 || pt->seconds == 0)
218 return 0;
219 /* where the stream started (in seconds) */
220 result = pt->start_chunk * pt->seconds / pt->num_chunks;
221 if (pt->wn.btrn) { /* Add the uptime of the writer node */
222 struct timeval diff = {.tv_sec = 0}, wstime;
223 btr_get_node_start(pt->wn.btrn, &wstime);
224 if (wstime.tv_sec > 0)
225 tv_diff(now, &wstime, &diff);
226 result += diff.tv_sec;
227 }
228 result = PARA_MIN(result, pt->seconds);
229 result = PARA_MAX(result, 0UL);
230 return result;
231 }
232
233 static void wipe_receiver_node(struct play_task *pt)
234 {
235 PARA_NOTICE_LOG("cleaning up receiver node\n");
236 btr_remove_node(&pt->rn.btrn);
237 afh_recv->close(&pt->rn);
238 afh_recv->free_config(pt->rn.conf);
239 memset(&pt->rn, 0, sizeof(struct receiver_node));
240 }
241
242 /* returns: 0 not eof, 1: eof, < 0: fatal error. */
243 static int get_playback_error(struct play_task *pt)
244 {
245 int err;
246
247 if (!pt->wn.task)
248 return 0;
249 err = task_status(pt->wn.task);
250 if (err >= 0)
251 return 0;
252 if (task_status(pt->fn.task) >= 0)
253 return 0;
254 if (task_status(pt->rn.task) >= 0)
255 return 0;
256 if (err == -E_BTR_EOF || err == -E_RECV_EOF || err == -E_EOF
257 || err == -E_WRITE_COMMON_EOF)
258 return 1;
259 return err;
260 }
261
262 static int eof_cleanup(struct play_task *pt)
263 {
264 struct writer *w = writers + DEFAULT_WRITER;
265 const struct filter *decoder = filter_get(pt->fn.filter_num);
266 int ret;
267
268 ret = get_playback_error(pt);
269 if (ret == 0)
270 return ret;
271 PARA_NOTICE_LOG("cleaning up wn/fn nodes\n");
272 task_reap(&pt->wn.task);
273 w->close(&pt->wn);
274 btr_remove_node(&pt->wn.btrn);
275 w->free_config(pt->wn.conf);
276 memset(&pt->wn, 0, sizeof(struct writer_node));
277
278 task_reap(&pt->fn.task);
279 if (decoder->close)
280 decoder->close(&pt->fn);
281 btr_remove_node(&pt->fn.btrn);
282 free(pt->fn.conf);
283 memset(&pt->fn, 0, sizeof(struct filter_node));
284
285 task_reap(&pt->rn.task);
286 btr_remove_node(&pt->rn.btrn);
287 /*
288 * On eof (ret > 0), we do not wipe the receiver node struct until a
289 * new file is loaded because we still need it for jumping around when
290 * paused.
291 */
292 if (ret < 0)
293 wipe_receiver_node(pt);
294 return ret;
295 }
296
297 static int shuffle_compare(__a_unused const void *a, __a_unused const void *b)
298 {
299 return para_random(100) - 50;
300 }
301
302 static void shuffle(char **base, size_t num)
303 {
304 srandom(time(NULL));
305 qsort(base, num, sizeof(char *), shuffle_compare);
306 }
307
308 static struct btr_node *new_recv_btrn(struct receiver_node *rn)
309 {
310 return btr_new_node(&(struct btr_node_description)
311 EMBRACE(.name = afh_recv->name, .context = rn,
312 .handler = afh_recv->execute));
313 }
314
315 static int open_new_file(struct play_task *pt)
316 {
317 int ret;
318 char *tmp, *path = conf.inputs[pt->next_file], *afh_recv_conf[] =
319 {"play", "-f", path, "-b", "0", NULL};
320
321 PARA_NOTICE_LOG("next file: %s\n", path);
322 wipe_receiver_node(pt);
323 pt->start_chunk = 0;
324 pt->rn.btrn = new_recv_btrn(&pt->rn);
325 pt->rn.conf = afh_recv->parse_config(ARRAY_SIZE(afh_recv_conf) - 1,
326 afh_recv_conf);
327 assert(pt->rn.conf);
328 pt->rn.receiver = afh_recv;
329 ret = afh_recv->open(&pt->rn);
330 if (ret < 0) {
331 PARA_ERROR_LOG("could not open %s: %s\n", path,
332 para_strerror(-ret));
333 goto fail;
334 }
335 pt->audio_format_num = ret;
336 free(pt->afhi_txt);
337 ret = btr_exec_up(pt->rn.btrn, "afhi", &pt->afhi_txt);
338 if (ret < 0)
339 pt->afhi_txt = make_message("[afhi command failed]\n");
340 ret = btr_exec_up(pt->rn.btrn, "seconds_total", &tmp);
341 if (ret < 0)
342 pt->seconds = 1;
343 else {
344 int32_t x;
345 ret = para_atoi32(tmp, &x);
346 pt->seconds = ret < 0? 1 : x;
347 free(tmp);
348 tmp = NULL;
349 }
350 ret = btr_exec_up(pt->rn.btrn, "chunks_total", &tmp);
351 if (ret < 0)
352 pt->num_chunks = 1;
353 else {
354 int32_t x;
355 ret = para_atoi32(tmp, &x);
356 pt->num_chunks = ret < 0? 1 : x;
357 free(tmp);
358 tmp = NULL;
359 }
360 return 1;
361 fail:
362 wipe_receiver_node(pt);
363 return ret;
364 }
365
366 static int load_file(struct play_task *pt)
367 {
368 const char *af;
369 char *tmp, buf[20];
370 int ret;
371 const struct filter *decoder;
372
373 btr_remove_node(&pt->rn.btrn);
374 if (!pt->rn.receiver || pt->next_file != pt->current_file) {
375 ret = open_new_file(pt);
376 if (ret < 0)
377 return ret;
378 } else {
379 pt->rn.btrn = new_recv_btrn(&pt->rn);
380 sprintf(buf, "repos %lu", pt->start_chunk);
381 ret = btr_exec_up(pt->rn.btrn, buf, &tmp);
382 if (ret < 0)
383 PARA_CRIT_LOG("repos failed: %s\n", para_strerror(-ret));
384 freep(&tmp);
385 }
386 if (!pt->playing)
387 return 0;
388 /* set up decoding filter */
389 af = audio_format_name(pt->audio_format_num);
390 tmp = make_message("%sdec", af);
391 ret = check_filter_arg(tmp, &pt->fn.conf);
392 freep(&tmp);
393 if (ret < 0)
394 goto fail;
395 pt->fn.filter_num = ret;
396 decoder = filter_get(ret);
397 pt->fn.btrn = btr_new_node(&(struct btr_node_description)
398 EMBRACE(.name = decoder->name, .parent = pt->rn.btrn,
399 .handler = decoder->execute, .context = &pt->fn));
400 if (decoder->open)
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 char *get_key_map_seq_safe(int key)
596 {
597 const char hex[] = "0123456789abcdef";
598 char *seq = get_key_map_seq(key), *sseq;
599 size_t n, len = strlen(seq);
600
601 if (len == 1 && isprint(*seq))
602 return seq;
603 sseq = para_malloc(2 + 2 * len + 1);
604 sseq[0] = '0';
605 sseq[1] = 'x';
606 for (n = 0; n < len; n++) {
607 uint8_t val = (seq[n] & 0xf0) >> 4;
608 sseq[2 + 2 * n] = hex[val];
609 val = seq[n] & 0xf;
610 sseq[2 + 2 * n + 1] = hex[val];
611 }
612 free(seq);
613 sseq[2 + 2 * n] = '\0';
614 return sseq;
615 }
616
617 static inline char *get_internal_key_map_cmd(int key)
618 {
619 return para_strdup(default_commands[get_internal_key_map_idx(key)]);
620 }
621
622 static char *get_user_key_map_cmd(int key)
623 {
624 const char *kma = get_user_key_map_arg(key);
625 const char *p = strchr(kma + 1, ':');
626
627 if (!p)
628 return NULL;
629 return para_strdup(p + 1);
630 }
631
632 static char *get_key_map_cmd(int key)
633 {
634 return is_internal_key(key)?
635 get_internal_key_map_cmd(key) : get_user_key_map_cmd(key);
636 }
637
638 static char **get_mapped_keyseqs(void)
639 {
640 char **result;
641 int i;
642
643 result = para_malloc((NUM_MAPPED_KEYS + 1) * sizeof(char *));
644 FOR_EACH_MAPPED_KEY(i) {
645 char *seq = get_key_map_seq(i);
646 result[i] = seq;
647 }
648 result[i] = NULL;
649 return result;
650 }
651
652 #include "play.command_list.h"
653
654 typedef int play_command_handler_t(struct play_task *, int, char**);
655 static play_command_handler_t PLAY_COMMAND_HANDLERS;
656
657 /* defines one command of para_play */
658 struct pp_command {
659 const char *name;
660 play_command_handler_t *handler;
661 const char *description;
662 const char *usage;
663 const char *help;
664 };
665
666 static struct pp_command pp_cmds[] = {DEFINE_PLAY_CMD_ARRAY};
667 #define FOR_EACH_COMMAND(c) for (c = 0; pp_cmds[c].name; c++)
668
669 #include "play.completion.h"
670 static struct i9e_completer pp_completers[];
671
672 I9E_DUMMY_COMPLETER(jmp);
673 I9E_DUMMY_COMPLETER(next);
674 I9E_DUMMY_COMPLETER(prev);
675 I9E_DUMMY_COMPLETER(fg);
676 I9E_DUMMY_COMPLETER(bg);
677 I9E_DUMMY_COMPLETER(ls);
678 I9E_DUMMY_COMPLETER(info);
679 I9E_DUMMY_COMPLETER(play);
680 I9E_DUMMY_COMPLETER(pause);
681 I9E_DUMMY_COMPLETER(stop);
682 I9E_DUMMY_COMPLETER(tasks);
683 I9E_DUMMY_COMPLETER(quit);
684 I9E_DUMMY_COMPLETER(ff);
685
686 static void help_completer(struct i9e_completion_info *ci,
687 struct i9e_completion_result *result)
688 {
689 result->matches = i9e_complete_commands(ci->word, pp_completers);
690 }
691
692 static struct i9e_completer pp_completers[] = {PLAY_COMPLETERS {.name = NULL}};
693
694 static void attach_stdout(struct play_task *pt, const char *name)
695 {
696 if (pt->btrn)
697 return;
698 pt->btrn = btr_new_node(&(struct btr_node_description)
699 EMBRACE(.name = name));
700 i9e_attach_to_stdout(pt->btrn);
701 }
702
703 static void detach_stdout(struct play_task *pt)
704 {
705 btr_remove_node(&pt->btrn);
706 }
707
708 static int com_quit(struct play_task *pt, int argc, __a_unused char **argv)
709 {
710 if (argc != 1)
711 return -E_PLAY_SYNTAX;
712 pt->rq = CRT_TERM_RQ;
713 return 0;
714 }
715
716 static int com_help(struct play_task *pt, int argc, char **argv)
717 {
718 int i;
719 char *buf;
720 size_t sz;
721
722 if (argc > 2)
723 return -E_PLAY_SYNTAX;
724 if (argc < 2) {
725 if (pt->background)
726 FOR_EACH_COMMAND(i) {
727 sz = xasprintf(&buf, "%s\t%s\n", pp_cmds[i].name,
728 pp_cmds[i].description);
729 btr_add_output(buf, sz, pt->btrn);
730 }
731 else {
732 FOR_EACH_MAPPED_KEY(i) {
733 bool internal = is_internal_key(i);
734 int idx = get_key_map_idx(i);
735 char *seq = get_key_map_seq_safe(i);
736 char *cmd = get_key_map_cmd(i);
737 sz = xasprintf(&buf,
738 "%s key #%d: %s -> %s\n",
739 internal? "internal" : "user-defined",
740 idx, seq, cmd);
741 btr_add_output(buf, sz, pt->btrn);
742 free(seq);
743 free(cmd);
744 }
745 }
746 return 0;
747 }
748 FOR_EACH_COMMAND(i) {
749 if (strcmp(pp_cmds[i].name, argv[1]))
750 continue;
751 sz = xasprintf(&buf,
752 "NAME\n\t%s -- %s\n"
753 "SYNOPSIS\n\t%s\n"
754 "DESCRIPTION\n%s\n",
755 argv[1],
756 pp_cmds[i].description,
757 pp_cmds[i].usage,
758 pp_cmds[i].help
759 );
760 btr_add_output(buf, sz, pt->btrn);
761 return 0;
762 }
763 return -E_BAD_PLAY_CMD;
764 }
765
766 static int com_info(struct play_task *pt, int argc, __a_unused char **argv)
767 {
768 char *buf;
769 size_t sz;
770 static char dflt[] = "[no information available]";
771
772 if (argc != 1)
773 return -E_PLAY_SYNTAX;
774 sz = xasprintf(&buf, "playlist_pos: %u\npath: %s\n",
775 pt->current_file, conf.inputs[pt->current_file]);
776 btr_add_output(buf, sz, pt->btrn);
777 buf = pt->afhi_txt? pt->afhi_txt : dflt;
778 btr_add_output_dont_free(buf, strlen(buf), pt->btrn);
779 return 0;
780 }
781
782 static void list_file(struct play_task *pt, int num)
783 {
784 char *buf;
785 size_t sz;
786
787 sz = xasprintf(&buf, "%s %4u %s\n", num == pt->current_file?
788 "*" : " ", num, conf.inputs[num]);
789 btr_add_output(buf, sz, pt->btrn);
790 }
791
792 static int com_tasks(struct play_task *pt, int argc, __a_unused char **argv)
793 {
794 static char state;
795 char *buf;
796 size_t sz;
797
798 if (argc != 1)
799 return -E_PLAY_SYNTAX;
800
801 buf = get_task_list(&sched);
802 btr_add_output(buf, strlen(buf), pt->btrn);
803 state = get_playback_state(pt);
804 sz = xasprintf(&buf, "state: %c\n", state);
805 btr_add_output(buf, sz, pt->btrn);
806 return 0;
807 }
808
809 static int com_ls(struct play_task *pt, int argc, char **argv)
810 {
811 int i, j, ret;
812
813 if (argc == 1) {
814 FOR_EACH_PLAYLIST_FILE(i)
815 list_file(pt, i);
816 return 0;
817 }
818 for (j = 1; j < argc; j++) {
819 FOR_EACH_PLAYLIST_FILE(i) {
820 ret = fnmatch(argv[j], conf.inputs[i], 0);
821 if (ret == 0) /* match */
822 list_file(pt, i);
823 }
824 }
825 return 0;
826 }
827
828 static int com_play(struct play_task *pt, int argc, char **argv)
829 {
830 int32_t x;
831 int ret;
832 char state;
833
834 if (argc > 2)
835 return -E_PLAY_SYNTAX;
836 state = get_playback_state(pt);
837 if (argc == 1) {
838 if (state == 'P')
839 return 0;
840 pt->next_file = pt->current_file;
841 pt->rq = CRT_REPOS;
842 pt->playing = true;
843 return 0;
844 }
845 ret = para_atoi32(argv[1], &x);
846 if (ret < 0)
847 return ret;
848 if (x < 0 || x >= conf.inputs_num)
849 return -ERRNO_TO_PARA_ERROR(EINVAL);
850 kill_stream(pt);
851 pt->next_file = x;
852 pt->rq = CRT_FILE_CHANGE;
853 return 0;
854 }
855
856 static int com_pause(struct play_task *pt, int argc, __a_unused char **argv)
857 {
858 char state;
859 long unsigned seconds, ss;
860
861 if (argc != 1)
862 return -E_PLAY_SYNTAX;
863 state = get_playback_state(pt);
864 pt->playing = false;
865 if (state != 'P')
866 return 0;
867 seconds = get_play_time(pt);
868 pt->playing = false;
869 ss = 0;
870 if (pt->seconds > 0)
871 ss = seconds * pt->num_chunks / pt->seconds + 1;
872 ss = PARA_MAX(ss, 0UL);
873 ss = PARA_MIN(ss, pt->num_chunks);
874 pt->start_chunk = ss;
875 kill_stream(pt);
876 return 0;
877 }
878
879 static int com_prev(struct play_task *pt, int argc, __a_unused char **argv)
880
881 {
882 int ret;
883
884 if (argc != 1)
885 return -E_PLAY_SYNTAX;
886 ret = previous_valid_file(pt);
887 if (ret < 0)
888 return ret;
889 kill_stream(pt);
890 pt->next_file = ret;
891 pt->rq = CRT_FILE_CHANGE;
892 pt->start_chunk = 0;
893 return 0;
894 }
895
896 static int com_next(struct play_task *pt, int argc, __a_unused char **argv)
897 {
898 int ret;
899
900 if (argc != 1)
901 return -E_PLAY_SYNTAX;
902 ret = next_valid_file(pt);
903 if (ret < 0)
904 return ret;
905 kill_stream(pt);
906 pt->next_file = ret;
907 pt->rq = CRT_FILE_CHANGE;
908 pt->start_chunk = 0;
909 return 0;
910 }
911
912 static int com_fg(struct play_task *pt, int argc, __a_unused char **argv)
913 {
914 if (argc != 1)
915 return -E_PLAY_SYNTAX;
916 pt->background = false;
917 return 0;
918 }
919
920 static int com_bg(struct play_task *pt, int argc, __a_unused char **argv)
921 {
922 if (argc != 1)
923 return -E_PLAY_SYNTAX;
924 pt->background = true;
925 return 0;
926 }
927
928 static int com_jmp(struct play_task *pt, int argc, char **argv)
929 {
930 int32_t percent;
931 int ret;
932
933 if (argc != 2)
934 return -E_PLAY_SYNTAX;
935 ret = para_atoi32(argv[1], &percent);
936 if (ret < 0)
937 return ret;
938 if (percent < 0 || percent > 100)
939 return -ERRNO_TO_PARA_ERROR(EINVAL);
940 if (percent == 100)
941 return com_next(pt, 1, (char *[]){"next", NULL});
942 if (pt->playing && !pt->fn.btrn)
943 return 0;
944 pt->start_chunk = percent * pt->num_chunks / 100;
945 if (!pt->playing)
946 return 0;
947 pt->rq = CRT_REPOS;
948 kill_stream(pt);
949 return 0;
950 }
951
952 static int com_ff(struct play_task *pt, int argc, char **argv)
953 {
954 int32_t seconds;
955 int ret;
956
957 if (argc != 2)
958 return -E_PLAY_SYNTAX;
959 ret = para_atoi32(argv[1], &seconds);
960 if (ret < 0)
961 return ret;
962 if (pt->playing && !pt->fn.btrn)
963 return 0;
964 seconds += get_play_time(pt);
965 seconds = PARA_MIN(seconds, (typeof(seconds))pt->seconds - 4);
966 seconds = PARA_MAX(seconds, 0);
967 pt->start_chunk = pt->num_chunks * seconds / pt->seconds;
968 pt->start_chunk = PARA_MIN(pt->start_chunk, pt->num_chunks - 1);
969 pt->start_chunk = PARA_MAX(pt->start_chunk, 0UL);
970 if (!pt->playing)
971 return 0;
972 pt->rq = CRT_REPOS;
973 kill_stream(pt);
974 return 0;
975 }
976
977 static int run_command(char *line, struct play_task *pt)
978 {
979 int i, ret, argc;
980 char **argv = NULL;
981
982 attach_stdout(pt, __FUNCTION__);
983 ret = create_argv(line, " ", &argv);
984 if (ret < 0) {
985 PARA_ERROR_LOG("parse error: %s\n", para_strerror(-ret));
986 return 0;
987 }
988 if (ret == 0)
989 goto out;
990 argc = ret;
991 FOR_EACH_COMMAND(i) {
992 if (strcmp(pp_cmds[i].name, argv[0]))
993 continue;
994 ret = pp_cmds[i].handler(pt, argc, argv);
995 if (ret < 0)
996 PARA_WARNING_LOG("%s: %s\n", pt->background?
997 "" : argv[0], para_strerror(-ret));
998 ret = 1;
999 goto out;
1000 }
1001 PARA_WARNING_LOG("invalid command: %s\n", argv[0]);
1002 ret = 0;
1003 out:
1004 free_argv(argv);
1005 return ret;
1006 }
1007
1008 static int play_i9e_line_handler(char *line)
1009 {
1010 return run_command(line, &play_task);
1011 }
1012
1013 static int play_i9e_key_handler(int key)
1014 {
1015 struct play_task *pt = &play_task;
1016 int idx = get_key_map_idx(key);
1017 char *seq = get_key_map_seq(key);
1018 char *cmd = get_key_map_cmd(key);
1019 bool internal = is_internal_key(key);
1020
1021 PARA_NOTICE_LOG("pressed %d: %s key #%d (%s -> %s)\n",
1022 key, internal? "internal" : "user-defined",
1023 idx, seq, cmd);
1024 run_command(cmd, pt);
1025 free(seq);
1026 free(cmd);
1027 pt->next_update = *now;
1028 return 0;
1029 }
1030
1031 static struct i9e_client_info ici = {
1032 .fds = {0, 1, 2},
1033 .prompt = "para_play> ",
1034 .line_handler = play_i9e_line_handler,
1035 .key_handler = play_i9e_key_handler,
1036 .completers = pp_completers,
1037 };
1038
1039 static void sigint_handler(int sig)
1040 {
1041 play_task.background = true;
1042 i9e_signal_dispatch(sig);
1043 }
1044
1045 /*
1046 * We start with para_log() set to the standard log function which writes to
1047 * stderr. Once the i9e subsystem has been initialized, we switch to the i9e
1048 * log facility.
1049 */
1050 static void session_open(struct play_task *pt)
1051 {
1052 int ret;
1053 char *history_file;
1054 struct sigaction act;
1055
1056 PARA_NOTICE_LOG("\n%s\n", version_text("play"));
1057 if (conf.history_file_given)
1058 history_file = para_strdup(conf.history_file_arg);
1059 else {
1060 char *home = para_homedir();
1061 history_file = make_message("%s/.paraslash/play.history",
1062 home);
1063 free(home);
1064 }
1065 ici.history_file = history_file;
1066 ici.loglevel = loglevel;
1067
1068 act.sa_handler = sigint_handler;
1069 sigemptyset(&act.sa_mask);
1070 act.sa_flags = 0;
1071 sigaction(SIGINT, &act, NULL);
1072 act.sa_handler = i9e_signal_dispatch;
1073 sigemptyset(&act.sa_mask);
1074 act.sa_flags = 0;
1075 sigaction(SIGWINCH, &act, NULL);
1076 sched.select_function = i9e_select;
1077
1078 ici.bound_keyseqs = get_mapped_keyseqs();
1079 pt->btrn = ici.producer = btr_new_node(&(struct btr_node_description)
1080 EMBRACE(.name = __FUNCTION__));
1081 ret = i9e_open(&ici, &sched);
1082 if (ret < 0)
1083 goto out;
1084 para_log = i9e_log;
1085 return;
1086 out:
1087 free(history_file);
1088 if (ret >= 0)
1089 return;
1090 PARA_EMERG_LOG("fatal: %s\n", para_strerror(-ret));
1091 exit(EXIT_FAILURE);
1092 }
1093
1094 static void session_update_time_string(struct play_task *pt, char *str, unsigned len)
1095 {
1096 if (pt->background)
1097 return;
1098 if (pt->btrn) {
1099 if (btr_get_output_queue_size(pt->btrn) > 0)
1100 return;
1101 if (btr_get_input_queue_size(pt->btrn) > 0)
1102 return;
1103 }
1104 ie9_print_status_bar(str, len);
1105 }
1106
1107 /*
1108 * If we are about to die we must call i9e_close() to reset the terminal.
1109 * However, i9e_close() must be called in *this* context, i.e. from
1110 * play_task.post_select() rather than from i9e_post_select(), because
1111 * otherwise i9e would access freed memory upon return. So the play task must
1112 * stay alive until the i9e task terminates.
1113 *
1114 * We achieve this by sending a fake SIGTERM signal via i9e_signal_dispatch()
1115 * and reschedule. In the next iteration, i9e->post_select returns an error and
1116 * terminates. Subsequent calls to i9e_get_error() then return negative and we
1117 * are allowed to call i9e_close() and terminate as well.
1118 */
1119 static int session_post_select(__a_unused struct sched *s, struct play_task *pt)
1120 {
1121 int ret;
1122
1123 if (pt->background)
1124 detach_stdout(pt);
1125 else
1126 attach_stdout(pt, __FUNCTION__);
1127 ret = i9e_get_error();
1128 if (ret < 0) {
1129 kill_stream(pt);
1130 i9e_close();
1131 para_log = stderr_log;
1132 free(ici.history_file);
1133 return ret;
1134 }
1135 if (get_playback_state(pt) == 'X')
1136 i9e_signal_dispatch(SIGTERM);
1137 return 0;
1138 }
1139
1140 #else /* HAVE_READLINE */
1141
1142 static int session_post_select(struct sched *s, struct play_task *pt)
1143 {
1144 char c;
1145
1146 if (!FD_ISSET(STDIN_FILENO, &s->rfds))
1147 return 0;
1148 if (read(STDIN_FILENO, &c, 1))
1149 do_nothing;
1150 kill_stream(pt);
1151 return 1;
1152 }
1153
1154 static void session_open(__a_unused struct play_task *pt)
1155 {
1156 }
1157
1158 static void session_update_time_string(__a_unused struct play_task *pt,
1159 char *str, __a_unused unsigned len)
1160 {
1161 printf("\r%s ", str);
1162 fflush(stdout);
1163 }
1164 #endif /* HAVE_READLINE */
1165
1166 static void play_pre_select(struct sched *s, void *context)
1167 {
1168 struct play_task *pt = context;
1169 char state;
1170
1171 para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
1172 state = get_playback_state(pt);
1173 if (state == 'R' || state == 'F' || state == 'X')
1174 return sched_min_delay(s);
1175 sched_request_barrier_or_min_delay(&pt->next_update, s);
1176 }
1177
1178 static unsigned get_time_string(struct play_task *pt, char **result)
1179 {
1180 int seconds, length;
1181 char state = get_playback_state(pt);
1182
1183 /* do not return anything if things are about to change */
1184 if (state != 'P' && state != 'U') {
1185 *result = NULL;
1186 return 0;
1187 }
1188 length = pt->seconds;
1189 if (length == 0)
1190 return xasprintf(result, "0:00 [0:00] (0%%/0:00)");
1191 seconds = get_play_time(pt);
1192 return xasprintf(result, "#%u: %d:%02d [%d:%02d] (%d%%/%d:%02d) %s",
1193 pt->current_file,
1194 seconds / 60,
1195 seconds % 60,
1196 (length - seconds) / 60,
1197 (length - seconds) % 60,
1198 length? (seconds * 100 + length / 2) / length : 0,
1199 length / 60,
1200 length % 60,
1201 conf.inputs[pt->current_file]
1202 );
1203 }
1204
1205 static int play_post_select(struct sched *s, void *context)
1206 {
1207 struct play_task *pt = context;
1208 int ret;
1209
1210 ret = eof_cleanup(pt);
1211 if (ret < 0) {
1212 pt->rq = CRT_TERM_RQ;
1213 return 0;
1214 }
1215 ret = session_post_select(s, pt);
1216 if (ret < 0)
1217 goto out;
1218 if (!pt->wn.btrn && !pt->fn.btrn) {
1219 char state = get_playback_state(pt);
1220 if (state == 'P' || state == 'R' || state == 'F') {
1221 PARA_NOTICE_LOG("state: %c\n", state);
1222 ret = load_next_file(pt);
1223 if (ret < 0) {
1224 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1225 pt->rq = CRT_TERM_RQ;
1226 ret = 1;
1227 goto out;
1228 }
1229 pt->next_update = *now;
1230 }
1231 }
1232 if (tv_diff(now, &pt->next_update, NULL) >= 0) {
1233 char *str;
1234 unsigned len = get_time_string(pt, &str);
1235 struct timeval delay = {.tv_sec = 0, .tv_usec = 100 * 1000};
1236 if (str && len > 0)
1237 session_update_time_string(pt, str, len);
1238 free(str);
1239 tv_add(now, &delay, &pt->next_update);
1240 }
1241 ret = 1;
1242 out:
1243 return ret;
1244 }
1245
1246 /**
1247 * The main function of para_play.
1248 *
1249 * \param argc Standard.
1250 * \param argv Standard.
1251 *
1252 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
1253 */
1254 int main(int argc, char *argv[])
1255 {
1256 int ret;
1257 struct play_task *pt = &play_task;
1258
1259 /* needed this early to make help work */
1260 recv_init();
1261 filter_init();
1262 writer_init();
1263
1264 sched.default_timeout.tv_sec = 5;
1265
1266 parse_config_or_die(argc, argv);
1267 if (conf.inputs_num == 0)
1268 print_help_and_die();
1269 check_afh_receiver_or_die();
1270
1271 session_open(pt);
1272 if (conf.randomize_given)
1273 shuffle(conf.inputs, conf.inputs_num);
1274 pt->invalid = para_calloc(sizeof(*pt->invalid) * conf.inputs_num);
1275 pt->rq = CRT_FILE_CHANGE;
1276 pt->current_file = conf.inputs_num - 1;
1277 pt->playing = true;
1278 pt->task = task_register(&(struct task_info){
1279 .name = "play",
1280 .pre_select = play_pre_select,
1281 .post_select = play_post_select,
1282 .context = pt,
1283 }, &sched);
1284 ret = schedule(&sched);
1285 sched_shutdown(&sched);
1286 if (ret < 0)
1287 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1288 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1289 }