crypt.c: Combine load_key() and get_private_key().
[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 /** Array of error strings. */
40 DEFINE_PARA_ERRLIST;
41
42 /**
43 * Describes a request to change the state of para_play.
44 *
45 * There is only one variable of this type: \a rq of the global play task
46 * structure. Command handlers only set this variable and the post_select()
47 * function of the play task investigates its value during each iteration of
48 * the scheduler run and performs the actual work.
49 */
50 enum state_change_request_type {
51 /** Everybody is happy. */
52 CRT_NONE,
53 /** Stream must be repositioned (com_jmp(), com_ff()). */
54 CRT_REPOS,
55 /** New file should be loaded (com_next()). */
56 CRT_FILE_CHANGE,
57 /** Someone wants us for dead (com_quit()). */
58 CRT_TERM_RQ
59 };
60
61 struct play_task {
62 struct task *task;
63 /* A bit array of invalid files (those will be skipped). */
64 bool *invalid;
65 /* The file which is currently open. */
66 unsigned current_file;
67 /* When to update the status again. */
68 struct timeval next_update;
69
70 /* Root of the buffer tree for command and status output. */
71 struct btr_node *btrn;
72
73 /* The decoding machinery. */
74 struct receiver_node rn;
75 struct filter_node fn;
76 struct writer_node wn;
77
78 /* See comment to enum state_change_request_type above */
79 enum state_change_request_type rq;
80 /* only relevant if rq == CRT_FILE_CHANGE */
81 unsigned next_file;
82 /*
83 bg: read lines at prompt, fg: display status and wait
84 for keystroke.
85 */
86 bool background;
87
88 /* We have the *intention* to play. Set by com_play(). */
89 bool playing;
90
91 /* as returned by afh_recv->open() */
92 int audio_format_num;
93
94 /* retrieved via the btr exec mechanism */
95 long unsigned start_chunk;
96 long unsigned seconds;
97 long unsigned num_chunks;
98 char *afhi_txt;
99 };
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\n", path);
332 goto fail;
333 }
334 pt->audio_format_num = ret;
335 free(pt->afhi_txt);
336 ret = btr_exec_up(pt->rn.btrn, "afhi", &pt->afhi_txt);
337 if (ret < 0)
338 pt->afhi_txt = make_message("[afhi command failed]\n");
339 ret = btr_exec_up(pt->rn.btrn, "seconds_total", &tmp);
340 if (ret < 0)
341 pt->seconds = 1;
342 else {
343 int32_t x;
344 ret = para_atoi32(tmp, &x);
345 pt->seconds = ret < 0? 1 : x;
346 free(tmp);
347 tmp = NULL;
348 }
349 ret = btr_exec_up(pt->rn.btrn, "chunks_total", &tmp);
350 if (ret < 0)
351 pt->num_chunks = 1;
352 else {
353 int32_t x;
354 ret = para_atoi32(tmp, &x);
355 pt->num_chunks = ret < 0? 1 : x;
356 free(tmp);
357 tmp = NULL;
358 }
359 return 1;
360 fail:
361 wipe_receiver_node(pt);
362 return ret;
363 }
364
365 static int load_file(struct play_task *pt)
366 {
367 const char *af;
368 char *tmp, buf[20];
369 int ret;
370 const struct filter *decoder;
371
372 btr_remove_node(&pt->rn.btrn);
373 if (!pt->rn.receiver || pt->next_file != pt->current_file) {
374 ret = open_new_file(pt);
375 if (ret < 0)
376 return ret;
377 } else {
378 pt->rn.btrn = new_recv_btrn(&pt->rn);
379 sprintf(buf, "repos %lu", pt->start_chunk);
380 ret = btr_exec_up(pt->rn.btrn, buf, &tmp);
381 if (ret < 0)
382 PARA_CRIT_LOG("repos failed: %s\n", para_strerror(-ret));
383 freep(&tmp);
384 }
385 if (!pt->playing)
386 return 0;
387 /* set up decoding filter */
388 af = audio_format_name(pt->audio_format_num);
389 tmp = make_message("%sdec", af);
390 PARA_INFO_LOG("decoder: %s\n", tmp);
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 PARA_INFO_LOG("buffer tree:\n");
403 btr_log_tree(pt->rn.btrn, LL_INFO);
404
405 /* setup default writer */
406 pt->wn.conf = check_writer_arg_or_die(NULL, &pt->wn.writer_num);
407
408 /* success, register tasks */
409 pt->rn.task = task_register(
410 &(struct task_info) {
411 .name = afh_recv->name,
412 .pre_select = afh_recv->pre_select,
413 .post_select = afh_recv->post_select,
414 .context = &pt->rn
415 }, &sched);
416 sprintf(buf, "%s decoder", af);
417 pt->fn.task = task_register(
418 &(struct task_info) {
419 .name = buf,
420 .pre_select = decoder->pre_select,
421 .post_select = decoder->post_select,
422 .context = &pt->fn
423 }, &sched);
424 register_writer_node(&pt->wn, pt->fn.btrn, &sched);
425 return 1;
426 fail:
427 wipe_receiver_node(pt);
428 return ret;
429 }
430
431 static int next_valid_file(struct play_task *pt)
432 {
433 int i, j = pt->current_file;
434
435 FOR_EACH_PLAYLIST_FILE(i) {
436 j = (j + 1) % conf.inputs_num;
437 if (!pt->invalid[j])
438 return j;
439 }
440 return -E_NO_VALID_FILES;
441 }
442
443 static int load_next_file(struct play_task *pt)
444 {
445 int ret;
446
447 again:
448 if (pt->rq == CRT_NONE) {
449 pt->start_chunk = 0;
450 ret = next_valid_file(pt);
451 if (ret < 0)
452 return ret;
453 pt->next_file = ret;
454 } else if (pt->rq == CRT_REPOS)
455 pt->next_file = pt->current_file;
456 ret = load_file(pt);
457 if (ret < 0) {
458 PARA_ERROR_LOG("%s: marking file as invalid\n",
459 para_strerror(-ret));
460 pt->invalid[pt->next_file] = true;
461 pt->rq = CRT_NONE;
462 goto again;
463 }
464 pt->current_file = pt->next_file;
465 pt->rq = CRT_NONE;
466 return ret;
467 }
468
469 static void kill_stream(struct play_task *pt)
470 {
471 if (pt->wn.task)
472 task_notify(pt->wn.task, E_EOF);
473 }
474
475 #ifdef HAVE_READLINE
476
477 /* only called from com_prev(), nec. only if we have readline */
478 static int previous_valid_file(struct play_task *pt)
479 {
480 int i, j = pt->current_file;
481
482 FOR_EACH_PLAYLIST_FILE(i) {
483 j--;
484 if (j < 0)
485 j = conf.inputs_num - 1;
486 if (!pt->invalid[j])
487 return j;
488 }
489 return -E_NO_VALID_FILES;
490 }
491
492 #include "interactive.h"
493
494 /*
495 * Define the default (internal) key mappings and helper functions to get the
496 * key sequence or the command from a key id, which is what we obtain from
497 * i9e/readline when the key is pressed.
498 *
499 * In some of these helper functions we could return pointers to the constant
500 * arrays defined below. However, for others we can not, so let's better be
501 * consistent and allocate all returned strings on the heap.
502 */
503
504 #define INTERNAL_KEYMAP_ENTRIES \
505 KEYMAP_ENTRY("^", "jmp 0"), \
506 KEYMAP_ENTRY("1", "jmp 10"), \
507 KEYMAP_ENTRY("2", "jmp 21"), \
508 KEYMAP_ENTRY("3", "jmp 32"), \
509 KEYMAP_ENTRY("4", "jmp 43"), \
510 KEYMAP_ENTRY("5", "jmp 54"), \
511 KEYMAP_ENTRY("6", "jmp 65"), \
512 KEYMAP_ENTRY("7", "jmp 76"), \
513 KEYMAP_ENTRY("8", "jmp 87"), \
514 KEYMAP_ENTRY("9", "jmp 98"), \
515 KEYMAP_ENTRY("+", "next"), \
516 KEYMAP_ENTRY("-", "prev"), \
517 KEYMAP_ENTRY(":", "bg"), \
518 KEYMAP_ENTRY("i", "info"), \
519 KEYMAP_ENTRY("l", "ls"), \
520 KEYMAP_ENTRY("s", "play"), \
521 KEYMAP_ENTRY("p", "pause"), \
522 KEYMAP_ENTRY("q", "quit"), \
523 KEYMAP_ENTRY("?", "help"), \
524 KEYMAP_ENTRY("\033[D", "ff -10"), \
525 KEYMAP_ENTRY("\033[C", "ff 10"), \
526 KEYMAP_ENTRY("\033[A", "ff 60"), \
527 KEYMAP_ENTRY("\033[B", "ff -60"), \
528
529 #define KEYMAP_ENTRY(a, b) a
530 static const char *default_keyseqs[] = {INTERNAL_KEYMAP_ENTRIES};
531 #undef KEYMAP_ENTRY
532 #define KEYMAP_ENTRY(a, b) b
533 static const char *default_commands[] = {INTERNAL_KEYMAP_ENTRIES};
534 #undef KEYMAP_ENTRY
535 #define NUM_INTERNALLY_MAPPED_KEYS ARRAY_SIZE(default_commands)
536 #define NUM_MAPPED_KEYS (NUM_INTERNALLY_MAPPED_KEYS + conf.key_map_given)
537 #define FOR_EACH_MAPPED_KEY(i) for (i = 0; i < NUM_MAPPED_KEYS; i++)
538
539 static inline bool is_internal_key(int key)
540 {
541 return key < NUM_INTERNALLY_MAPPED_KEYS;
542 }
543
544 /* for internal keys, the key id is just the array index. */
545 static inline int get_internal_key_map_idx(int key)
546 {
547 assert(is_internal_key(key));
548 return key;
549 }
550
551 /*
552 * For user-defined keys, we have to subtract NUM_INTERNALLY_MAPPED_KEYS. The
553 * difference is the index to the array of user defined key maps.
554 */
555 static inline int get_user_key_map_idx(int key)
556 {
557 assert(!is_internal_key(key));
558 return key - NUM_INTERNALLY_MAPPED_KEYS;
559 }
560
561 static inline int get_key_map_idx(int key)
562 {
563 return is_internal_key(key)?
564 get_internal_key_map_idx(key) : get_user_key_map_idx(key);
565 }
566
567 static inline char *get_user_key_map_arg(int key)
568 {
569 return conf.key_map_arg[get_user_key_map_idx(key)];
570 }
571
572 static inline char *get_internal_key_map_seq(int key)
573 {
574 return para_strdup(default_keyseqs[get_internal_key_map_idx(key)]);
575 }
576
577 static char *get_user_key_map_seq(int key)
578 {
579 const char *kma = get_user_key_map_arg(key);
580 const char *p = strchr(kma + 1, ':');
581 char *result;
582 int len;
583
584 if (!p)
585 return NULL;
586 len = p - kma;
587 result = para_malloc(len + 1);
588 memcpy(result, kma, len);
589 result[len] = '\0';
590 return result;
591 }
592
593 static char *get_key_map_seq(int key)
594 {
595 return is_internal_key(key)?
596 get_internal_key_map_seq(key) : get_user_key_map_seq(key);
597 }
598
599 static char *get_key_map_seq_safe(int key)
600 {
601 const char hex[] = "0123456789abcdef";
602 char *seq = get_key_map_seq(key), *sseq;
603 size_t n, len = strlen(seq);
604
605 if (len == 1 && isprint(*seq))
606 return seq;
607 sseq = para_malloc(2 + 2 * len + 1);
608 sseq[0] = '0';
609 sseq[1] = 'x';
610 for (n = 0; n < len; n++) {
611 uint8_t val = (seq[n] & 0xf0) >> 4;
612 sseq[2 + 2 * n] = hex[val];
613 val = seq[n] & 0xf;
614 sseq[2 + 2 * n + 1] = hex[val];
615 }
616 free(seq);
617 sseq[2 + 2 * n] = '\0';
618 return sseq;
619 }
620
621 static inline char *get_internal_key_map_cmd(int key)
622 {
623 return para_strdup(default_commands[get_internal_key_map_idx(key)]);
624 }
625
626 static char *get_user_key_map_cmd(int key)
627 {
628 const char *kma = get_user_key_map_arg(key);
629 const char *p = strchr(kma + 1, ':');
630
631 if (!p)
632 return NULL;
633 return para_strdup(p + 1);
634 }
635
636 static char *get_key_map_cmd(int key)
637 {
638 return is_internal_key(key)?
639 get_internal_key_map_cmd(key) : get_user_key_map_cmd(key);
640 }
641
642 static char **get_mapped_keyseqs(void)
643 {
644 char **result;
645 int i;
646
647 result = para_malloc((NUM_MAPPED_KEYS + 1) * sizeof(char *));
648 FOR_EACH_MAPPED_KEY(i) {
649 char *seq = get_key_map_seq(i);
650 result[i] = seq;
651 }
652 result[i] = NULL;
653 return result;
654 }
655
656 #include "play.command_list.h"
657
658 typedef int play_command_handler_t(struct play_task *, int, char**);
659 static play_command_handler_t PLAY_COMMAND_HANDLERS;
660
661 /* defines one command of para_play */
662 struct pp_command {
663 const char *name;
664 play_command_handler_t *handler;
665 const char *description;
666 const char *usage;
667 const char *help;
668 };
669
670 static struct pp_command pp_cmds[] = {DEFINE_PLAY_CMD_ARRAY};
671 #define FOR_EACH_COMMAND(c) for (c = 0; pp_cmds[c].name; c++)
672
673 #include "play.completion.h"
674 static struct i9e_completer pp_completers[];
675
676 I9E_DUMMY_COMPLETER(jmp);
677 I9E_DUMMY_COMPLETER(next);
678 I9E_DUMMY_COMPLETER(prev);
679 I9E_DUMMY_COMPLETER(fg);
680 I9E_DUMMY_COMPLETER(bg);
681 I9E_DUMMY_COMPLETER(ls);
682 I9E_DUMMY_COMPLETER(info);
683 I9E_DUMMY_COMPLETER(play);
684 I9E_DUMMY_COMPLETER(pause);
685 I9E_DUMMY_COMPLETER(stop);
686 I9E_DUMMY_COMPLETER(tasks);
687 I9E_DUMMY_COMPLETER(quit);
688 I9E_DUMMY_COMPLETER(ff);
689
690 static void help_completer(struct i9e_completion_info *ci,
691 struct i9e_completion_result *result)
692 {
693 result->matches = i9e_complete_commands(ci->word, pp_completers);
694 }
695
696 static struct i9e_completer pp_completers[] = {PLAY_COMPLETERS {.name = NULL}};
697
698 static void attach_stdout(struct play_task *pt, const char *name)
699 {
700 if (pt->btrn)
701 return;
702 pt->btrn = btr_new_node(&(struct btr_node_description)
703 EMBRACE(.name = name));
704 i9e_attach_to_stdout(pt->btrn);
705 }
706
707 static void detach_stdout(struct play_task *pt)
708 {
709 btr_remove_node(&pt->btrn);
710 }
711
712 static int com_quit(struct play_task *pt, int argc, __a_unused char **argv)
713 {
714 if (argc != 1)
715 return -E_PLAY_SYNTAX;
716 pt->rq = CRT_TERM_RQ;
717 return 0;
718 }
719
720 static int com_help(struct play_task *pt, int argc, char **argv)
721 {
722 int i;
723 char *buf;
724 size_t sz;
725
726 if (argc > 2)
727 return -E_PLAY_SYNTAX;
728 if (argc < 2) {
729 if (pt->background)
730 FOR_EACH_COMMAND(i) {
731 sz = xasprintf(&buf, "%s\t%s\n", pp_cmds[i].name,
732 pp_cmds[i].description);
733 btr_add_output(buf, sz, pt->btrn);
734 }
735 else {
736 FOR_EACH_MAPPED_KEY(i) {
737 bool internal = is_internal_key(i);
738 int idx = get_key_map_idx(i);
739 char *seq = get_key_map_seq_safe(i);
740 char *cmd = get_key_map_cmd(i);
741 sz = xasprintf(&buf,
742 "%s key #%d: %s -> %s\n",
743 internal? "internal" : "user-defined",
744 idx, seq, cmd);
745 btr_add_output(buf, sz, pt->btrn);
746 free(seq);
747 free(cmd);
748 }
749 }
750 return 0;
751 }
752 FOR_EACH_COMMAND(i) {
753 if (strcmp(pp_cmds[i].name, argv[1]))
754 continue;
755 sz = xasprintf(&buf,
756 "NAME\n\t%s -- %s\n"
757 "SYNOPSIS\n\t%s\n"
758 "DESCRIPTION\n%s\n",
759 argv[1],
760 pp_cmds[i].description,
761 pp_cmds[i].usage,
762 pp_cmds[i].help
763 );
764 btr_add_output(buf, sz, pt->btrn);
765 return 0;
766 }
767 return -E_BAD_PLAY_CMD;
768 }
769
770 static int com_info(struct play_task *pt, int argc, __a_unused char **argv)
771 {
772 char *buf;
773 size_t sz;
774 static char dflt[] = "[no information available]";
775
776 if (argc != 1)
777 return -E_PLAY_SYNTAX;
778 sz = xasprintf(&buf, "playlist_pos: %u\npath: %s\n",
779 pt->current_file, conf.inputs[pt->current_file]);
780 btr_add_output(buf, sz, pt->btrn);
781 buf = pt->afhi_txt? pt->afhi_txt : dflt;
782 btr_add_output_dont_free(buf, strlen(buf), pt->btrn);
783 return 0;
784 }
785
786 static void list_file(struct play_task *pt, int num)
787 {
788 char *buf;
789 size_t sz;
790
791 sz = xasprintf(&buf, "%s %4d %s\n", num == pt->current_file?
792 "*" : " ", num, conf.inputs[num]);
793 btr_add_output(buf, sz, pt->btrn);
794 }
795
796 static int com_tasks(struct play_task *pt, int argc, __a_unused char **argv)
797 {
798 static char state;
799 char *buf;
800 size_t sz;
801
802 if (argc != 1)
803 return -E_PLAY_SYNTAX;
804
805 buf = get_task_list(&sched);
806 btr_add_output(buf, strlen(buf), pt->btrn);
807 state = get_playback_state(pt);
808 sz = xasprintf(&buf, "state: %c\n", state);
809 btr_add_output(buf, sz, pt->btrn);
810 return 0;
811 }
812
813 static int com_ls(struct play_task *pt, int argc, char **argv)
814 {
815 int i, j, ret;
816
817 if (argc == 1) {
818 FOR_EACH_PLAYLIST_FILE(i)
819 list_file(pt, i);
820 return 0;
821 }
822 for (j = 1; j < argc; j++) {
823 FOR_EACH_PLAYLIST_FILE(i) {
824 ret = fnmatch(argv[j], conf.inputs[i], 0);
825 if (ret == 0) /* match */
826 list_file(pt, i);
827 }
828 }
829 return 0;
830 }
831
832 static int com_play(struct play_task *pt, int argc, char **argv)
833 {
834 int32_t x;
835 int ret;
836 char state;
837
838 if (argc > 2)
839 return -E_PLAY_SYNTAX;
840 state = get_playback_state(pt);
841 if (argc == 1) {
842 if (state == 'P')
843 return 0;
844 pt->next_file = pt->current_file;
845 pt->rq = CRT_REPOS;
846 pt->playing = true;
847 return 0;
848 }
849 ret = para_atoi32(argv[1], &x);
850 if (ret < 0)
851 return ret;
852 if (x < 0 || x >= conf.inputs_num)
853 return -ERRNO_TO_PARA_ERROR(EINVAL);
854 kill_stream(pt);
855 pt->next_file = x;
856 pt->rq = CRT_FILE_CHANGE;
857 return 0;
858 }
859
860 static int com_pause(struct play_task *pt, int argc, __a_unused char **argv)
861 {
862 char state;
863 long unsigned seconds, ss;
864
865 if (argc != 1)
866 return -E_PLAY_SYNTAX;
867 state = get_playback_state(pt);
868 pt->playing = false;
869 if (state != 'P')
870 return 0;
871 seconds = get_play_time(pt);
872 pt->playing = false;
873 ss = 0;
874 if (pt->seconds > 0)
875 ss = seconds * pt->num_chunks / pt->seconds + 1;
876 ss = PARA_MAX(ss, 0UL);
877 ss = PARA_MIN(ss, pt->num_chunks);
878 pt->start_chunk = ss;
879 kill_stream(pt);
880 return 0;
881 }
882
883 static int com_prev(struct play_task *pt, int argc, __a_unused char **argv)
884
885 {
886 int ret;
887
888 if (argc != 1)
889 return -E_PLAY_SYNTAX;
890 ret = previous_valid_file(pt);
891 if (ret < 0)
892 return ret;
893 kill_stream(pt);
894 pt->next_file = ret;
895 pt->rq = CRT_FILE_CHANGE;
896 pt->start_chunk = 0;
897 return 0;
898 }
899
900 static int com_next(struct play_task *pt, int argc, __a_unused char **argv)
901 {
902 int ret;
903
904 if (argc != 1)
905 return -E_PLAY_SYNTAX;
906 ret = next_valid_file(pt);
907 if (ret < 0)
908 return ret;
909 kill_stream(pt);
910 pt->next_file = ret;
911 pt->rq = CRT_FILE_CHANGE;
912 pt->start_chunk = 0;
913 return 0;
914 }
915
916 static int com_fg(struct play_task *pt, int argc, __a_unused char **argv)
917 {
918 if (argc != 1)
919 return -E_PLAY_SYNTAX;
920 pt->background = false;
921 return 0;
922 }
923
924 static int com_bg(struct play_task *pt, int argc, __a_unused char **argv)
925 {
926 if (argc != 1)
927 return -E_PLAY_SYNTAX;
928 pt->background = true;
929 return 0;
930 }
931
932 static int com_jmp(struct play_task *pt, int argc, char **argv)
933 {
934 int32_t percent;
935 int ret;
936
937 if (argc != 2)
938 return -E_PLAY_SYNTAX;
939 ret = para_atoi32(argv[1], &percent);
940 if (ret < 0)
941 return ret;
942 if (percent < 0 || percent > 100)
943 return -ERRNO_TO_PARA_ERROR(EINVAL);
944 if (percent == 100)
945 return com_next(pt, 1, (char *[]){"next", NULL});
946 if (pt->playing && !pt->fn.btrn)
947 return 0;
948 pt->start_chunk = percent * pt->num_chunks / 100;
949 if (!pt->playing)
950 return 0;
951 pt->rq = CRT_REPOS;
952 kill_stream(pt);
953 return 0;
954 }
955
956 static int com_ff(struct play_task *pt, int argc, char **argv)
957 {
958 int32_t seconds;
959 int ret;
960
961 if (argc != 2)
962 return -E_PLAY_SYNTAX;
963 ret = para_atoi32(argv[1], &seconds);
964 if (ret < 0)
965 return ret;
966 if (pt->playing && !pt->fn.btrn)
967 return 0;
968 seconds += get_play_time(pt);
969 seconds = PARA_MIN(seconds, (typeof(seconds))pt->seconds - 4);
970 seconds = PARA_MAX(seconds, 0);
971 pt->start_chunk = pt->num_chunks * seconds / pt->seconds;
972 pt->start_chunk = PARA_MIN(pt->start_chunk, pt->num_chunks - 1);
973 pt->start_chunk = PARA_MAX(pt->start_chunk, 0UL);
974 if (!pt->playing)
975 return 0;
976 pt->rq = CRT_REPOS;
977 kill_stream(pt);
978 return 0;
979 }
980
981 static int run_command(char *line, struct play_task *pt)
982 {
983 int i, ret, argc;
984 char **argv = NULL;
985
986 attach_stdout(pt, __FUNCTION__);
987 ret = create_argv(line, " ", &argv);
988 if (ret < 0) {
989 PARA_ERROR_LOG("parse error: %s\n", para_strerror(-ret));
990 return 0;
991 }
992 if (ret == 0)
993 goto out;
994 argc = ret;
995 FOR_EACH_COMMAND(i) {
996 if (strcmp(pp_cmds[i].name, argv[0]))
997 continue;
998 ret = pp_cmds[i].handler(pt, argc, argv);
999 if (ret < 0)
1000 PARA_WARNING_LOG("%s: %s\n", pt->background?
1001 "" : argv[0], para_strerror(-ret));
1002 ret = 1;
1003 goto out;
1004 }
1005 PARA_WARNING_LOG("invalid command: %s\n", argv[0]);
1006 ret = 0;
1007 out:
1008 free_argv(argv);
1009 return ret;
1010 }
1011
1012 static int play_i9e_line_handler(char *line)
1013 {
1014 return run_command(line, &play_task);
1015 }
1016
1017 static int play_i9e_key_handler(int key)
1018 {
1019 struct play_task *pt = &play_task;
1020 int idx = get_key_map_idx(key);
1021 char *seq = get_key_map_seq(key);
1022 char *cmd = get_key_map_cmd(key);
1023 bool internal = is_internal_key(key);
1024
1025 PARA_NOTICE_LOG("pressed %d: %s key #%d (%s -> %s)\n",
1026 key, internal? "internal" : "user-defined",
1027 idx, seq, cmd);
1028 run_command(cmd, pt);
1029 free(seq);
1030 free(cmd);
1031 pt->next_update = *now;
1032 return 0;
1033 }
1034
1035 static struct i9e_client_info ici = {
1036 .fds = {0, 1, 2},
1037 .prompt = "para_play> ",
1038 .line_handler = play_i9e_line_handler,
1039 .key_handler = play_i9e_key_handler,
1040 .completers = pp_completers,
1041 };
1042
1043 static void sigint_handler(int sig)
1044 {
1045 play_task.background = true;
1046 i9e_signal_dispatch(sig);
1047 }
1048
1049 /*
1050 * We start with para_log() set to the standard log function which writes to
1051 * stderr. Once the i9e subsystem has been initialized, we switch to the i9e
1052 * log facility.
1053 */
1054 static void session_open(struct play_task *pt)
1055 {
1056 int ret;
1057 char *history_file;
1058 struct sigaction act;
1059
1060 PARA_NOTICE_LOG("\n%s\n", version_text("play"));
1061 if (conf.history_file_given)
1062 history_file = para_strdup(conf.history_file_arg);
1063 else {
1064 char *home = para_homedir();
1065 history_file = make_message("%s/.paraslash/play.history",
1066 home);
1067 free(home);
1068 }
1069 ici.history_file = history_file;
1070 ici.loglevel = loglevel;
1071
1072 act.sa_handler = sigint_handler;
1073 sigemptyset(&act.sa_mask);
1074 act.sa_flags = 0;
1075 sigaction(SIGINT, &act, NULL);
1076 act.sa_handler = i9e_signal_dispatch;
1077 sigemptyset(&act.sa_mask);
1078 act.sa_flags = 0;
1079 sigaction(SIGWINCH, &act, NULL);
1080 sched.select_function = i9e_select;
1081
1082 ici.bound_keyseqs = get_mapped_keyseqs();
1083 pt->btrn = ici.producer = btr_new_node(&(struct btr_node_description)
1084 EMBRACE(.name = __FUNCTION__));
1085 ret = i9e_open(&ici, &sched);
1086 if (ret < 0)
1087 goto out;
1088 para_log = i9e_log;
1089 return;
1090 out:
1091 free(history_file);
1092 if (ret >= 0)
1093 return;
1094 PARA_EMERG_LOG("fatal: %s\n", para_strerror(-ret));
1095 exit(EXIT_FAILURE);
1096 }
1097
1098 static void session_update_time_string(struct play_task *pt, char *str, unsigned len)
1099 {
1100 if (pt->background)
1101 return;
1102 if (pt->btrn) {
1103 if (btr_get_output_queue_size(pt->btrn) > 0)
1104 return;
1105 if (btr_get_input_queue_size(pt->btrn) > 0)
1106 return;
1107 }
1108 ie9_print_status_bar(str, len);
1109 }
1110
1111 /*
1112 * If we are about to die we must call i9e_close() to reset the terminal.
1113 * However, i9e_close() must be called in *this* context, i.e. from
1114 * play_task.post_select() rather than from i9e_post_select(), because
1115 * otherwise i9e would access freed memory upon return. So the play task must
1116 * stay alive until the i9e task terminates.
1117 *
1118 * We achieve this by sending a fake SIGTERM signal via i9e_signal_dispatch()
1119 * and reschedule. In the next iteration, i9e->post_select returns an error and
1120 * terminates. Subsequent calls to i9e_get_error() then return negative and we
1121 * are allowed to call i9e_close() and terminate as well.
1122 */
1123 static int session_post_select(__a_unused struct sched *s, struct play_task *pt)
1124 {
1125 int ret;
1126
1127 if (pt->background)
1128 detach_stdout(pt);
1129 else
1130 attach_stdout(pt, __FUNCTION__);
1131 ret = i9e_get_error();
1132 if (ret < 0) {
1133 kill_stream(pt);
1134 i9e_close();
1135 para_log = stderr_log;
1136 free(ici.history_file);
1137 return ret;
1138 }
1139 if (get_playback_state(pt) == 'X')
1140 i9e_signal_dispatch(SIGTERM);
1141 return 0;
1142 }
1143
1144 #else /* HAVE_READLINE */
1145
1146 static int session_post_select(struct sched *s, struct play_task *pt)
1147 {
1148 char c;
1149
1150 if (!FD_ISSET(STDIN_FILENO, &s->rfds))
1151 return 0;
1152 if (read(STDIN_FILENO, &c, 1))
1153 do_nothing;
1154 kill_stream(pt);
1155 return 1;
1156 }
1157
1158 static void session_open(__a_unused struct play_task *pt)
1159 {
1160 }
1161
1162 static void session_update_time_string(__a_unused struct play_task *pt,
1163 char *str, __a_unused unsigned len)
1164 {
1165 printf("\r%s ", str);
1166 fflush(stdout);
1167 }
1168 #endif /* HAVE_READLINE */
1169
1170 static void play_pre_select(struct sched *s, void *context)
1171 {
1172 struct play_task *pt = context;
1173 char state;
1174
1175 para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
1176 state = get_playback_state(pt);
1177 if (state == 'R' || state == 'F' || state == 'X')
1178 return sched_min_delay(s);
1179 sched_request_barrier_or_min_delay(&pt->next_update, s);
1180 }
1181
1182 static unsigned get_time_string(struct play_task *pt, char **result)
1183 {
1184 int seconds, length;
1185 char state = get_playback_state(pt);
1186
1187 /* do not return anything if things are about to change */
1188 if (state != 'P' && state != 'U') {
1189 *result = NULL;
1190 return 0;
1191 }
1192 length = pt->seconds;
1193 if (length == 0)
1194 return xasprintf(result, "0:00 [0:00] (0%%/0:00)");
1195 seconds = get_play_time(pt);
1196 return xasprintf(result, "#%u: %d:%02d [%d:%02d] (%d%%/%d:%02d) %s",
1197 pt->current_file,
1198 seconds / 60,
1199 seconds % 60,
1200 (length - seconds) / 60,
1201 (length - seconds) % 60,
1202 length? (seconds * 100 + length / 2) / length : 0,
1203 length / 60,
1204 length % 60,
1205 conf.inputs[pt->current_file]
1206 );
1207 }
1208
1209 static int play_post_select(struct sched *s, void *context)
1210 {
1211 struct play_task *pt = context;
1212 int ret;
1213
1214 ret = eof_cleanup(pt);
1215 if (ret < 0) {
1216 pt->rq = CRT_TERM_RQ;
1217 return 0;
1218 }
1219 ret = session_post_select(s, pt);
1220 if (ret < 0)
1221 goto out;
1222 if (!pt->wn.btrn && !pt->fn.btrn) {
1223 char state = get_playback_state(pt);
1224 if (state == 'P' || state == 'R' || state == 'F') {
1225 PARA_NOTICE_LOG("state: %c\n", state);
1226 ret = load_next_file(pt);
1227 if (ret < 0) {
1228 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1229 pt->rq = CRT_TERM_RQ;
1230 ret = 1;
1231 goto out;
1232 }
1233 pt->next_update = *now;
1234 }
1235 }
1236 if (tv_diff(now, &pt->next_update, NULL) >= 0) {
1237 char *str;
1238 unsigned len = get_time_string(pt, &str);
1239 struct timeval delay = {.tv_sec = 0, .tv_usec = 100 * 1000};
1240 if (str && len > 0)
1241 session_update_time_string(pt, str, len);
1242 free(str);
1243 tv_add(now, &delay, &pt->next_update);
1244 }
1245 ret = 1;
1246 out:
1247 return ret;
1248 }
1249
1250 /**
1251 * The main function of para_play.
1252 *
1253 * \param argc Standard.
1254 * \param argv Standard.
1255 *
1256 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
1257 */
1258 int main(int argc, char *argv[])
1259 {
1260 int ret;
1261 struct play_task *pt = &play_task;
1262
1263 /* needed this early to make help work */
1264 recv_init();
1265 filter_init();
1266 writer_init();
1267
1268 sched.default_timeout.tv_sec = 5;
1269
1270 parse_config_or_die(argc, argv);
1271 if (conf.inputs_num == 0)
1272 print_help_and_die();
1273 check_afh_receiver_or_die();
1274
1275 session_open(pt);
1276 if (conf.randomize_given)
1277 shuffle(conf.inputs, conf.inputs_num);
1278 pt->invalid = para_calloc(sizeof(*pt->invalid) * conf.inputs_num);
1279 pt->rq = CRT_FILE_CHANGE;
1280 pt->current_file = conf.inputs_num - 1;
1281 pt->playing = true;
1282 pt->task = task_register(&(struct task_info){
1283 .name = "play",
1284 .pre_select = play_pre_select,
1285 .post_select = play_post_select,
1286 .context = pt,
1287 }, &sched);
1288 ret = schedule(&sched);
1289 sched_shutdown(&sched);
1290 if (ret < 0)
1291 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1292 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1293 }