Merge branch 'refs/heads/t/i9e'
[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 decoder->open(&pt->fn);
401
402 /* setup default writer */
403 pt->wn.conf = check_writer_arg_or_die(NULL, &pt->wn.writer_num);
404
405 /* success, register tasks */
406 pt->rn.task = task_register(
407 &(struct task_info) {
408 .name = afh_recv->name,
409 .pre_select = afh_recv->pre_select,
410 .post_select = afh_recv->post_select,
411 .context = &pt->rn
412 }, &sched);
413 sprintf(buf, "%s decoder", af);
414 pt->fn.task = task_register(
415 &(struct task_info) {
416 .name = buf,
417 .pre_select = decoder->pre_select,
418 .post_select = decoder->post_select,
419 .context = &pt->fn
420 }, &sched);
421 register_writer_node(&pt->wn, pt->fn.btrn, &sched);
422 return 1;
423 fail:
424 wipe_receiver_node(pt);
425 return ret;
426 }
427
428 static int next_valid_file(struct play_task *pt)
429 {
430 int i, j = pt->current_file;
431
432 FOR_EACH_PLAYLIST_FILE(i) {
433 j = (j + 1) % conf.inputs_num;
434 if (!pt->invalid[j])
435 return j;
436 }
437 return -E_NO_VALID_FILES;
438 }
439
440 static int load_next_file(struct play_task *pt)
441 {
442 int ret;
443
444 again:
445 if (pt->rq == CRT_NONE) {
446 pt->start_chunk = 0;
447 ret = next_valid_file(pt);
448 if (ret < 0)
449 return ret;
450 pt->next_file = ret;
451 } else if (pt->rq == CRT_REPOS)
452 pt->next_file = pt->current_file;
453 ret = load_file(pt);
454 if (ret < 0) {
455 pt->invalid[pt->next_file] = true;
456 pt->rq = CRT_NONE;
457 goto again;
458 }
459 pt->current_file = pt->next_file;
460 pt->rq = CRT_NONE;
461 return ret;
462 }
463
464 static void kill_stream(struct play_task *pt)
465 {
466 if (pt->wn.task)
467 task_notify(pt->wn.task, E_EOF);
468 }
469
470 #ifdef HAVE_READLINE
471
472 /* only called from com_prev(), nec. only if we have readline */
473 static int previous_valid_file(struct play_task *pt)
474 {
475 int i, j = pt->current_file;
476
477 FOR_EACH_PLAYLIST_FILE(i) {
478 j--;
479 if (j < 0)
480 j = conf.inputs_num - 1;
481 if (!pt->invalid[j])
482 return j;
483 }
484 return -E_NO_VALID_FILES;
485 }
486
487 #include "interactive.h"
488
489 /*
490 * Define the default (internal) key mappings and helper functions to get the
491 * key sequence or the command from a key id, which is what we obtain from
492 * i9e/readline when the key is pressed.
493 *
494 * In some of these helper functions we could return pointers to the constant
495 * arrays defined below. However, for others we can not, so let's better be
496 * consistent and allocate all returned strings on the heap.
497 */
498
499 #define INTERNAL_KEYMAP_ENTRIES \
500 KEYMAP_ENTRY("^", "jmp 0"), \
501 KEYMAP_ENTRY("1", "jmp 10"), \
502 KEYMAP_ENTRY("2", "jmp 21"), \
503 KEYMAP_ENTRY("3", "jmp 32"), \
504 KEYMAP_ENTRY("4", "jmp 43"), \
505 KEYMAP_ENTRY("5", "jmp 54"), \
506 KEYMAP_ENTRY("6", "jmp 65"), \
507 KEYMAP_ENTRY("7", "jmp 76"), \
508 KEYMAP_ENTRY("8", "jmp 87"), \
509 KEYMAP_ENTRY("9", "jmp 98"), \
510 KEYMAP_ENTRY("+", "next"), \
511 KEYMAP_ENTRY("-", "prev"), \
512 KEYMAP_ENTRY(":", "bg"), \
513 KEYMAP_ENTRY("i", "info"), \
514 KEYMAP_ENTRY("l", "ls"), \
515 KEYMAP_ENTRY("s", "play"), \
516 KEYMAP_ENTRY("p", "pause"), \
517 KEYMAP_ENTRY("q", "quit"), \
518 KEYMAP_ENTRY("?", "help"), \
519 KEYMAP_ENTRY("\033[D", "ff -10"), \
520 KEYMAP_ENTRY("\033[C", "ff 10"), \
521 KEYMAP_ENTRY("\033[A", "ff 60"), \
522 KEYMAP_ENTRY("\033[B", "ff -60"), \
523
524 #define KEYMAP_ENTRY(a, b) a
525 static const char *default_keyseqs[] = {INTERNAL_KEYMAP_ENTRIES};
526 #undef KEYMAP_ENTRY
527 #define KEYMAP_ENTRY(a, b) b
528 static const char *default_commands[] = {INTERNAL_KEYMAP_ENTRIES};
529 #undef KEYMAP_ENTRY
530 #define NUM_INTERNALLY_MAPPED_KEYS ARRAY_SIZE(default_commands)
531 #define NUM_MAPPED_KEYS (NUM_INTERNALLY_MAPPED_KEYS + conf.key_map_given)
532 #define FOR_EACH_MAPPED_KEY(i) for (i = 0; i < NUM_MAPPED_KEYS; i++)
533
534 static inline bool is_internal_key(int key)
535 {
536 return key < NUM_INTERNALLY_MAPPED_KEYS;
537 }
538
539 /* for internal keys, the key id is just the array index. */
540 static inline int get_internal_key_map_idx(int key)
541 {
542 assert(is_internal_key(key));
543 return key;
544 }
545
546 /*
547 * For user-defined keys, we have to subtract NUM_INTERNALLY_MAPPED_KEYS. The
548 * difference is the index to the array of user defined key maps.
549 */
550 static inline int get_user_key_map_idx(int key)
551 {
552 assert(!is_internal_key(key));
553 return key - NUM_INTERNALLY_MAPPED_KEYS;
554 }
555
556 static inline int get_key_map_idx(int key)
557 {
558 return is_internal_key(key)?
559 get_internal_key_map_idx(key) : get_user_key_map_idx(key);
560 }
561
562 static inline char *get_user_key_map_arg(int key)
563 {
564 return conf.key_map_arg[get_user_key_map_idx(key)];
565 }
566
567 static inline char *get_internal_key_map_seq(int key)
568 {
569 return para_strdup(default_keyseqs[get_internal_key_map_idx(key)]);
570 }
571
572 static char *get_user_key_map_seq(int key)
573 {
574 const char *kma = get_user_key_map_arg(key);
575 const char *p = strchr(kma + 1, ':');
576 char *result;
577 int len;
578
579 if (!p)
580 return NULL;
581 len = p - kma;
582 result = para_malloc(len + 1);
583 memcpy(result, kma, len);
584 result[len] = '\0';
585 return result;
586 }
587
588 static char *get_key_map_seq(int key)
589 {
590 return is_internal_key(key)?
591 get_internal_key_map_seq(key) : get_user_key_map_seq(key);
592 }
593
594 static char *get_key_map_seq_safe(int key)
595 {
596 const char hex[] = "0123456789abcdef";
597 char *seq = get_key_map_seq(key), *sseq;
598 size_t n, len = strlen(seq);
599
600 if (len == 1 && isprint(*seq))
601 return seq;
602 sseq = para_malloc(2 + 2 * len + 1);
603 sseq[0] = '0';
604 sseq[1] = 'x';
605 for (n = 0; n < len; n++) {
606 uint8_t val = (seq[n] & 0xf0) >> 4;
607 sseq[2 + 2 * n] = hex[val];
608 val = seq[n] & 0xf;
609 sseq[2 + 2 * n + 1] = hex[val];
610 }
611 free(seq);
612 sseq[2 + 2 * n] = '\0';
613 return sseq;
614 }
615
616 static inline char *get_internal_key_map_cmd(int key)
617 {
618 return para_strdup(default_commands[get_internal_key_map_idx(key)]);
619 }
620
621 static char *get_user_key_map_cmd(int key)
622 {
623 const char *kma = get_user_key_map_arg(key);
624 const char *p = strchr(kma + 1, ':');
625
626 if (!p)
627 return NULL;
628 return para_strdup(p + 1);
629 }
630
631 static char *get_key_map_cmd(int key)
632 {
633 return is_internal_key(key)?
634 get_internal_key_map_cmd(key) : get_user_key_map_cmd(key);
635 }
636
637 static char **get_mapped_keyseqs(void)
638 {
639 char **result;
640 int i;
641
642 result = para_malloc((NUM_MAPPED_KEYS + 1) * sizeof(char *));
643 FOR_EACH_MAPPED_KEY(i) {
644 char *seq = get_key_map_seq(i);
645 result[i] = seq;
646 }
647 result[i] = NULL;
648 return result;
649 }
650
651 #include "play.command_list.h"
652
653 typedef int play_command_handler_t(struct play_task *, int, char**);
654 static play_command_handler_t PLAY_COMMAND_HANDLERS;
655
656 /* defines one command of para_play */
657 struct pp_command {
658 const char *name;
659 play_command_handler_t *handler;
660 const char *description;
661 const char *usage;
662 const char *help;
663 };
664
665 static struct pp_command pp_cmds[] = {DEFINE_PLAY_CMD_ARRAY};
666 #define FOR_EACH_COMMAND(c) for (c = 0; pp_cmds[c].name; c++)
667
668 #include "play.completion.h"
669 static struct i9e_completer pp_completers[];
670
671 I9E_DUMMY_COMPLETER(jmp);
672 I9E_DUMMY_COMPLETER(next);
673 I9E_DUMMY_COMPLETER(prev);
674 I9E_DUMMY_COMPLETER(fg);
675 I9E_DUMMY_COMPLETER(bg);
676 I9E_DUMMY_COMPLETER(ls);
677 I9E_DUMMY_COMPLETER(info);
678 I9E_DUMMY_COMPLETER(play);
679 I9E_DUMMY_COMPLETER(pause);
680 I9E_DUMMY_COMPLETER(stop);
681 I9E_DUMMY_COMPLETER(tasks);
682 I9E_DUMMY_COMPLETER(quit);
683 I9E_DUMMY_COMPLETER(ff);
684
685 static void help_completer(struct i9e_completion_info *ci,
686 struct i9e_completion_result *result)
687 {
688 result->matches = i9e_complete_commands(ci->word, pp_completers);
689 }
690
691 static struct i9e_completer pp_completers[] = {PLAY_COMPLETERS {.name = NULL}};
692
693 static void attach_stdout(struct play_task *pt, const char *name)
694 {
695 if (pt->btrn)
696 return;
697 pt->btrn = btr_new_node(&(struct btr_node_description)
698 EMBRACE(.name = name));
699 i9e_attach_to_stdout(pt->btrn);
700 }
701
702 static void detach_stdout(struct play_task *pt)
703 {
704 btr_remove_node(&pt->btrn);
705 }
706
707 static int com_quit(struct play_task *pt, int argc, __a_unused char **argv)
708 {
709 if (argc != 1)
710 return -E_PLAY_SYNTAX;
711 pt->rq = CRT_TERM_RQ;
712 return 0;
713 }
714
715 static int com_help(struct play_task *pt, int argc, char **argv)
716 {
717 int i;
718 char *buf;
719 size_t sz;
720
721 if (argc > 2)
722 return -E_PLAY_SYNTAX;
723 if (argc < 2) {
724 if (pt->background)
725 FOR_EACH_COMMAND(i) {
726 sz = xasprintf(&buf, "%s\t%s\n", pp_cmds[i].name,
727 pp_cmds[i].description);
728 btr_add_output(buf, sz, pt->btrn);
729 }
730 else {
731 FOR_EACH_MAPPED_KEY(i) {
732 bool internal = is_internal_key(i);
733 int idx = get_key_map_idx(i);
734 char *seq = get_key_map_seq_safe(i);
735 char *cmd = get_key_map_cmd(i);
736 sz = xasprintf(&buf,
737 "%s key #%d: %s -> %s\n",
738 internal? "internal" : "user-defined",
739 idx, seq, cmd);
740 btr_add_output(buf, sz, pt->btrn);
741 free(seq);
742 free(cmd);
743 }
744 }
745 return 0;
746 }
747 FOR_EACH_COMMAND(i) {
748 if (strcmp(pp_cmds[i].name, argv[1]))
749 continue;
750 sz = xasprintf(&buf,
751 "NAME\n\t%s -- %s\n"
752 "SYNOPSIS\n\t%s\n"
753 "DESCRIPTION\n%s\n",
754 argv[1],
755 pp_cmds[i].description,
756 pp_cmds[i].usage,
757 pp_cmds[i].help
758 );
759 btr_add_output(buf, sz, pt->btrn);
760 return 0;
761 }
762 return -E_BAD_PLAY_CMD;
763 }
764
765 static int com_info(struct play_task *pt, int argc, __a_unused char **argv)
766 {
767 char *buf;
768 size_t sz;
769 static char dflt[] = "[no information available]";
770
771 if (argc != 1)
772 return -E_PLAY_SYNTAX;
773 sz = xasprintf(&buf, "playlist_pos: %u\npath: %s\n",
774 pt->current_file, conf.inputs[pt->current_file]);
775 btr_add_output(buf, sz, pt->btrn);
776 buf = pt->afhi_txt? pt->afhi_txt : dflt;
777 btr_add_output_dont_free(buf, strlen(buf), pt->btrn);
778 return 0;
779 }
780
781 static void list_file(struct play_task *pt, int num)
782 {
783 char *buf;
784 size_t sz;
785
786 sz = xasprintf(&buf, "%s %4u %s\n", num == pt->current_file?
787 "*" : " ", num, conf.inputs[num]);
788 btr_add_output(buf, sz, pt->btrn);
789 }
790
791 static int com_tasks(struct play_task *pt, int argc, __a_unused char **argv)
792 {
793 static char state;
794 char *buf;
795 size_t sz;
796
797 if (argc != 1)
798 return -E_PLAY_SYNTAX;
799
800 buf = get_task_list(&sched);
801 btr_add_output(buf, strlen(buf), pt->btrn);
802 state = get_playback_state(pt);
803 sz = xasprintf(&buf, "state: %c\n", state);
804 btr_add_output(buf, sz, pt->btrn);
805 return 0;
806 }
807
808 static int com_ls(struct play_task *pt, int argc, char **argv)
809 {
810 int i, j, ret;
811
812 if (argc == 1) {
813 FOR_EACH_PLAYLIST_FILE(i)
814 list_file(pt, i);
815 return 0;
816 }
817 for (j = 1; j < argc; j++) {
818 FOR_EACH_PLAYLIST_FILE(i) {
819 ret = fnmatch(argv[j], conf.inputs[i], 0);
820 if (ret == 0) /* match */
821 list_file(pt, i);
822 }
823 }
824 return 0;
825 }
826
827 static int com_play(struct play_task *pt, int argc, char **argv)
828 {
829 int32_t x;
830 int ret;
831 char state;
832
833 if (argc > 2)
834 return -E_PLAY_SYNTAX;
835 state = get_playback_state(pt);
836 if (argc == 1) {
837 if (state == 'P')
838 return 0;
839 pt->next_file = pt->current_file;
840 pt->rq = CRT_REPOS;
841 pt->playing = true;
842 return 0;
843 }
844 ret = para_atoi32(argv[1], &x);
845 if (ret < 0)
846 return ret;
847 if (x < 0 || x >= conf.inputs_num)
848 return -ERRNO_TO_PARA_ERROR(EINVAL);
849 kill_stream(pt);
850 pt->next_file = x;
851 pt->rq = CRT_FILE_CHANGE;
852 return 0;
853 }
854
855 static int com_pause(struct play_task *pt, int argc, __a_unused char **argv)
856 {
857 char state;
858 long unsigned seconds, ss;
859
860 if (argc != 1)
861 return -E_PLAY_SYNTAX;
862 state = get_playback_state(pt);
863 pt->playing = false;
864 if (state != 'P')
865 return 0;
866 seconds = get_play_time(pt);
867 pt->playing = false;
868 ss = 0;
869 if (pt->seconds > 0)
870 ss = seconds * pt->num_chunks / pt->seconds + 1;
871 ss = PARA_MAX(ss, 0UL);
872 ss = PARA_MIN(ss, pt->num_chunks);
873 pt->start_chunk = ss;
874 kill_stream(pt);
875 return 0;
876 }
877
878 static int com_prev(struct play_task *pt, int argc, __a_unused char **argv)
879
880 {
881 int ret;
882
883 if (argc != 1)
884 return -E_PLAY_SYNTAX;
885 ret = previous_valid_file(pt);
886 if (ret < 0)
887 return ret;
888 kill_stream(pt);
889 pt->next_file = ret;
890 pt->rq = CRT_FILE_CHANGE;
891 pt->start_chunk = 0;
892 return 0;
893 }
894
895 static int com_next(struct play_task *pt, int argc, __a_unused char **argv)
896 {
897 int ret;
898
899 if (argc != 1)
900 return -E_PLAY_SYNTAX;
901 ret = next_valid_file(pt);
902 if (ret < 0)
903 return ret;
904 kill_stream(pt);
905 pt->next_file = ret;
906 pt->rq = CRT_FILE_CHANGE;
907 pt->start_chunk = 0;
908 return 0;
909 }
910
911 static int com_fg(struct play_task *pt, int argc, __a_unused char **argv)
912 {
913 if (argc != 1)
914 return -E_PLAY_SYNTAX;
915 pt->background = false;
916 return 0;
917 }
918
919 static int com_bg(struct play_task *pt, int argc, __a_unused char **argv)
920 {
921 if (argc != 1)
922 return -E_PLAY_SYNTAX;
923 pt->background = true;
924 return 0;
925 }
926
927 static int com_jmp(struct play_task *pt, int argc, char **argv)
928 {
929 int32_t percent;
930 int ret;
931
932 if (argc != 2)
933 return -E_PLAY_SYNTAX;
934 ret = para_atoi32(argv[1], &percent);
935 if (ret < 0)
936 return ret;
937 if (percent < 0 || percent > 100)
938 return -ERRNO_TO_PARA_ERROR(EINVAL);
939 if (percent == 100)
940 return com_next(pt, 1, (char *[]){"next", NULL});
941 if (pt->playing && !pt->fn.btrn)
942 return 0;
943 pt->start_chunk = percent * pt->num_chunks / 100;
944 if (!pt->playing)
945 return 0;
946 pt->rq = CRT_REPOS;
947 kill_stream(pt);
948 return 0;
949 }
950
951 static int com_ff(struct play_task *pt, int argc, char **argv)
952 {
953 int32_t seconds;
954 int ret;
955
956 if (argc != 2)
957 return -E_PLAY_SYNTAX;
958 ret = para_atoi32(argv[1], &seconds);
959 if (ret < 0)
960 return ret;
961 if (pt->playing && !pt->fn.btrn)
962 return 0;
963 seconds += get_play_time(pt);
964 seconds = PARA_MIN(seconds, (typeof(seconds))pt->seconds - 4);
965 seconds = PARA_MAX(seconds, 0);
966 pt->start_chunk = pt->num_chunks * seconds / pt->seconds;
967 pt->start_chunk = PARA_MIN(pt->start_chunk, pt->num_chunks - 1);
968 pt->start_chunk = PARA_MAX(pt->start_chunk, 0UL);
969 if (!pt->playing)
970 return 0;
971 pt->rq = CRT_REPOS;
972 kill_stream(pt);
973 return 0;
974 }
975
976 static int run_command(char *line, struct play_task *pt)
977 {
978 int i, ret, argc;
979 char **argv = NULL;
980
981 attach_stdout(pt, __FUNCTION__);
982 ret = create_argv(line, " ", &argv);
983 if (ret < 0) {
984 PARA_ERROR_LOG("parse error: %s\n", para_strerror(-ret));
985 return 0;
986 }
987 if (ret == 0)
988 goto out;
989 argc = ret;
990 FOR_EACH_COMMAND(i) {
991 if (strcmp(pp_cmds[i].name, argv[0]))
992 continue;
993 ret = pp_cmds[i].handler(pt, argc, argv);
994 if (ret < 0)
995 PARA_WARNING_LOG("%s: %s\n", pt->background?
996 "" : argv[0], para_strerror(-ret));
997 ret = 1;
998 goto out;
999 }
1000 PARA_WARNING_LOG("invalid command: %s\n", argv[0]);
1001 ret = 0;
1002 out:
1003 free_argv(argv);
1004 return ret;
1005 }
1006
1007 static int play_i9e_line_handler(char *line)
1008 {
1009 return run_command(line, &play_task);
1010 }
1011
1012 static int play_i9e_key_handler(int key)
1013 {
1014 struct play_task *pt = &play_task;
1015 int idx = get_key_map_idx(key);
1016 char *seq = get_key_map_seq(key);
1017 char *cmd = get_key_map_cmd(key);
1018 bool internal = is_internal_key(key);
1019
1020 PARA_NOTICE_LOG("pressed %d: %s key #%d (%s -> %s)\n",
1021 key, internal? "internal" : "user-defined",
1022 idx, seq, cmd);
1023 run_command(cmd, pt);
1024 free(seq);
1025 free(cmd);
1026 pt->next_update = *now;
1027 return 0;
1028 }
1029
1030 static struct i9e_client_info ici = {
1031 .fds = {0, 1, 2},
1032 .prompt = "para_play> ",
1033 .line_handler = play_i9e_line_handler,
1034 .key_handler = play_i9e_key_handler,
1035 .completers = pp_completers,
1036 };
1037
1038 static void sigint_handler(int sig)
1039 {
1040 play_task.background = true;
1041 i9e_signal_dispatch(sig);
1042 }
1043
1044 /*
1045 * We start with para_log() set to the standard log function which writes to
1046 * stderr. Once the i9e subsystem has been initialized, we switch to the i9e
1047 * log facility.
1048 */
1049 static void session_open(struct play_task *pt)
1050 {
1051 int ret;
1052 char *history_file;
1053 struct sigaction act;
1054
1055 PARA_NOTICE_LOG("\n%s\n", version_text("play"));
1056 if (conf.history_file_given)
1057 history_file = para_strdup(conf.history_file_arg);
1058 else {
1059 char *home = para_homedir();
1060 history_file = make_message("%s/.paraslash/play.history",
1061 home);
1062 free(home);
1063 }
1064 ici.history_file = history_file;
1065 ici.loglevel = loglevel;
1066
1067 act.sa_handler = sigint_handler;
1068 sigemptyset(&act.sa_mask);
1069 act.sa_flags = 0;
1070 sigaction(SIGINT, &act, NULL);
1071 act.sa_handler = i9e_signal_dispatch;
1072 sigemptyset(&act.sa_mask);
1073 act.sa_flags = 0;
1074 sigaction(SIGWINCH, &act, NULL);
1075 sched.select_function = i9e_select;
1076
1077 ici.bound_keyseqs = get_mapped_keyseqs();
1078 pt->btrn = ici.producer = btr_new_node(&(struct btr_node_description)
1079 EMBRACE(.name = __FUNCTION__));
1080 ret = i9e_open(&ici, &sched);
1081 if (ret < 0)
1082 goto out;
1083 para_log = i9e_log;
1084 return;
1085 out:
1086 free(history_file);
1087 if (ret >= 0)
1088 return;
1089 PARA_EMERG_LOG("fatal: %s\n", para_strerror(-ret));
1090 exit(EXIT_FAILURE);
1091 }
1092
1093 static void session_update_time_string(struct play_task *pt, char *str, unsigned len)
1094 {
1095 if (pt->background)
1096 return;
1097 if (pt->btrn) {
1098 if (btr_get_output_queue_size(pt->btrn) > 0)
1099 return;
1100 if (btr_get_input_queue_size(pt->btrn) > 0)
1101 return;
1102 }
1103 ie9_print_status_bar(str, len);
1104 }
1105
1106 /*
1107 * If we are about to die we must call i9e_close() to reset the terminal.
1108 * However, i9e_close() must be called in *this* context, i.e. from
1109 * play_task.post_select() rather than from i9e_post_select(), because
1110 * otherwise i9e would access freed memory upon return. So the play task must
1111 * stay alive until the i9e task terminates.
1112 *
1113 * We achieve this by sending a fake SIGTERM signal via i9e_signal_dispatch()
1114 * and reschedule. In the next iteration, i9e->post_select returns an error and
1115 * terminates. Subsequent calls to i9e_get_error() then return negative and we
1116 * are allowed to call i9e_close() and terminate as well.
1117 */
1118 static int session_post_select(__a_unused struct sched *s, struct play_task *pt)
1119 {
1120 int ret;
1121
1122 if (pt->background)
1123 detach_stdout(pt);
1124 else
1125 attach_stdout(pt, __FUNCTION__);
1126 ret = i9e_get_error();
1127 if (ret < 0) {
1128 kill_stream(pt);
1129 i9e_close();
1130 para_log = stderr_log;
1131 free(ici.history_file);
1132 return ret;
1133 }
1134 if (get_playback_state(pt) == 'X')
1135 i9e_signal_dispatch(SIGTERM);
1136 return 0;
1137 }
1138
1139 #else /* HAVE_READLINE */
1140
1141 static int session_post_select(struct sched *s, struct play_task *pt)
1142 {
1143 char c;
1144
1145 if (!FD_ISSET(STDIN_FILENO, &s->rfds))
1146 return 0;
1147 if (read(STDIN_FILENO, &c, 1))
1148 do_nothing;
1149 kill_stream(pt);
1150 return 1;
1151 }
1152
1153 static void session_open(__a_unused struct play_task *pt)
1154 {
1155 }
1156
1157 static void session_update_time_string(__a_unused struct play_task *pt,
1158 char *str, __a_unused unsigned len)
1159 {
1160 printf("\r%s ", str);
1161 fflush(stdout);
1162 }
1163 #endif /* HAVE_READLINE */
1164
1165 static void play_pre_select(struct sched *s, void *context)
1166 {
1167 struct play_task *pt = context;
1168 char state;
1169
1170 para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
1171 state = get_playback_state(pt);
1172 if (state == 'R' || state == 'F' || state == 'X')
1173 return sched_min_delay(s);
1174 sched_request_barrier_or_min_delay(&pt->next_update, s);
1175 }
1176
1177 static unsigned get_time_string(struct play_task *pt, char **result)
1178 {
1179 int seconds, length;
1180 char state = get_playback_state(pt);
1181
1182 /* do not return anything if things are about to change */
1183 if (state != 'P' && state != 'U') {
1184 *result = NULL;
1185 return 0;
1186 }
1187 length = pt->seconds;
1188 if (length == 0)
1189 return xasprintf(result, "0:00 [0:00] (0%%/0:00)");
1190 seconds = get_play_time(pt);
1191 return xasprintf(result, "#%u: %d:%02d [%d:%02d] (%d%%/%d:%02d) %s",
1192 pt->current_file,
1193 seconds / 60,
1194 seconds % 60,
1195 (length - seconds) / 60,
1196 (length - seconds) % 60,
1197 length? (seconds * 100 + length / 2) / length : 0,
1198 length / 60,
1199 length % 60,
1200 conf.inputs[pt->current_file]
1201 );
1202 }
1203
1204 static int play_post_select(struct sched *s, void *context)
1205 {
1206 struct play_task *pt = context;
1207 int ret;
1208
1209 ret = eof_cleanup(pt);
1210 if (ret < 0) {
1211 pt->rq = CRT_TERM_RQ;
1212 return 0;
1213 }
1214 ret = session_post_select(s, pt);
1215 if (ret < 0)
1216 goto out;
1217 if (!pt->wn.btrn && !pt->fn.btrn) {
1218 char state = get_playback_state(pt);
1219 if (state == 'P' || state == 'R' || state == 'F') {
1220 PARA_NOTICE_LOG("state: %c\n", state);
1221 ret = load_next_file(pt);
1222 if (ret < 0) {
1223 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1224 pt->rq = CRT_TERM_RQ;
1225 ret = 1;
1226 goto out;
1227 }
1228 pt->next_update = *now;
1229 }
1230 }
1231 if (tv_diff(now, &pt->next_update, NULL) >= 0) {
1232 char *str;
1233 unsigned len = get_time_string(pt, &str);
1234 struct timeval delay = {.tv_sec = 0, .tv_usec = 100 * 1000};
1235 if (str && len > 0)
1236 session_update_time_string(pt, str, len);
1237 free(str);
1238 tv_add(now, &delay, &pt->next_update);
1239 }
1240 ret = 1;
1241 out:
1242 return ret;
1243 }
1244
1245 /**
1246 * The main function of para_play.
1247 *
1248 * \param argc Standard.
1249 * \param argv Standard.
1250 *
1251 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
1252 */
1253 int main(int argc, char *argv[])
1254 {
1255 int ret;
1256 struct play_task *pt = &play_task;
1257
1258 /* needed this early to make help work */
1259 recv_init();
1260 filter_init();
1261 writer_init();
1262
1263 sched.default_timeout.tv_sec = 5;
1264
1265 parse_config_or_die(argc, argv);
1266 if (conf.inputs_num == 0)
1267 print_help_and_die();
1268 check_afh_receiver_or_die();
1269
1270 session_open(pt);
1271 if (conf.randomize_given)
1272 shuffle(conf.inputs, conf.inputs_num);
1273 pt->invalid = para_calloc(sizeof(*pt->invalid) * conf.inputs_num);
1274 pt->rq = CRT_FILE_CHANGE;
1275 pt->current_file = conf.inputs_num - 1;
1276 pt->playing = true;
1277 pt->task = task_register(&(struct task_info){
1278 .name = "play",
1279 .pre_select = play_pre_select,
1280 .post_select = play_post_select,
1281 .context = pt,
1282 }, &sched);
1283 ret = schedule(&sched);
1284 sched_shutdown(&sched);
1285 if (ret < 0)
1286 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1287 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1288 }