mixer: Use lsu_merge_config_file_options().
[paraslash.git] / play.c
1 /* Copyright (C) 2012 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
2
3 /** \file play.c Paraslash's standalone player. */
4
5 #include <regex.h>
6 #include <signal.h>
7 #include <lopsub.h>
8
9 #include "recv_cmd.lsg.h"
10 #include "play_cmd.lsg.h"
11 #include "write_cmd.lsg.h"
12 #include "play.lsg.h"
13 #include "para.h"
14 #include "lsu.h"
15 #include "list.h"
16 #include "error.h"
17 #include "buffer_tree.h"
18 #include "version.h"
19 #include "string.h"
20 #include "sched.h"
21 #include "filter.h"
22 #include "afh.h"
23 #include "recv.h"
24 #include "write.h"
25 #include "fd.h"
26
27 /**
28 * Besides playback tasks which correspond to the receiver/filter/writer nodes,
29 * para_play creates two further tasks: The play task and the i9e task. It is
30 * important whether a function can be called in the context of para_play or
31 * i9e or both. As a rule, all command handlers are called only in i9e context via
32 * the line handler (input mode) or the key handler (command mode) below.
33 *
34 * Playlist handling is done exclusively in play context.
35 */
36
37 /** Array of error strings. */
38 DEFINE_PARA_ERRLIST;
39
40 static struct lls_parse_result *play_lpr;
41
42 #define CMD_PTR (lls_cmd(0, play_suite))
43 #define OPT_RESULT(_name) \
44 (lls_opt_result(LSG_PLAY_PARA_PLAY_OPT_ ## _name, play_lpr))
45 #define OPT_GIVEN(_name) (lls_opt_given(OPT_RESULT(_name)))
46 #define OPT_UINT32_VAL(_name) (lls_uint32_val(0, OPT_RESULT(_name)))
47 #define OPT_STRING_VAL(_name) (lls_string_val(0, OPT_RESULT(_name)))
48
49 /**
50 * Describes a request to change the state of para_play.
51 *
52 * There is only one variable of this type: \a rq of the global play task
53 * structure. Command handlers only set this variable and the post_select()
54 * function of the play task investigates its value during each iteration of
55 * the scheduler run and performs the actual work.
56 */
57 enum state_change_request_type {
58 /** Everybody is happy. */
59 CRT_NONE,
60 /** Stream must be repositioned (com_jmp(), com_ff()). */
61 CRT_REPOS,
62 /** New file should be loaded (com_next()). */
63 CRT_FILE_CHANGE,
64 /** Someone wants us for dead (com_quit()). */
65 CRT_TERM_RQ
66 };
67
68 struct play_task {
69 struct task *task;
70 /* A bit array of invalid files (those will be skipped). */
71 bool *invalid;
72 /* The file which is currently open. */
73 unsigned current_file;
74 /* When to update the status again. */
75 struct timeval next_update;
76
77 /* Root of the buffer tree for command and status output. */
78 struct btr_node *btrn;
79
80 /* The decoding machinery. */
81 struct receiver_node rn;
82 struct filter_node fn;
83 struct writer_node wn;
84
85 /* See comment to enum \ref state_change_request_type above. */
86 enum state_change_request_type rq;
87 /* only relevant if rq == CRT_FILE_CHANGE */
88 unsigned next_file;
89 /*
90 bg: read lines at prompt, fg: display status and wait
91 for keystroke.
92 */
93 bool background;
94
95 /* We have the *intention* to play. Set by com_play(). */
96 bool playing;
97
98 /* as returned by afh_recv->open() */
99 int audio_format_num;
100
101 /* retrieved via the btr exec mechanism */
102 long unsigned start_chunk;
103 long unsigned seconds;
104 long unsigned num_chunks;
105 char *afhi_txt;
106 };
107
108 typedef int (*play_cmd_handler_t)(struct lls_parse_result *lpr);
109 struct play_command_info {
110 play_cmd_handler_t handler;
111 };
112 #define EXPORT_PLAY_CMD_HANDLER(_cmd) \
113 const struct play_command_info lsg_play_cmd_com_ ## _cmd ## _user_data = { \
114 .handler = com_ ## _cmd \
115 };
116
117 static int loglevel = LL_WARNING;
118
119 /** The log function which writes log messages to stderr. */
120 INIT_STDERR_LOGGING(loglevel);
121
122 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
123
124 static struct sched sched = {.max_fileno = 0};
125 static struct play_task play_task, *pt = &play_task;
126
127 #define AFH_RECV_CMD (lls_cmd(LSG_RECV_CMD_CMD_AFH, recv_cmd_suite))
128 #define AFH_RECV ((struct receiver *)lls_user_data(AFH_RECV_CMD))
129
130 static unsigned *shuffle_map;
131
132 static const char *get_playlist_file(unsigned idx)
133 {
134 return lls_input(shuffle_map[idx], play_lpr);
135 }
136
137 static void handle_help_flags(void)
138 {
139 char *help;
140
141 if (OPT_GIVEN(DETAILED_HELP))
142 help = lls_long_help(CMD_PTR);
143 else if (OPT_GIVEN(HELP) || lls_num_inputs(play_lpr) == 0)
144 help = lls_short_help(CMD_PTR);
145 else
146 return;
147 printf("%s\n", help);
148 free(help);
149 exit(EXIT_SUCCESS);
150 }
151
152 static void parse_config_or_die(int argc, char *argv[])
153 {
154 const struct lls_command *cmd = CMD_PTR;
155 int i, ret, cf_argc;
156 char *cf, *errctx, **cf_argv;
157 struct lls_parse_result *cf_lpr, *merged_lpr;
158 unsigned num_kmas;
159 void *map;
160 size_t sz;
161
162 ret = lls(lls_parse(argc, argv, cmd, &play_lpr, &errctx));
163 if (ret < 0)
164 goto fail;
165 loglevel = OPT_UINT32_VAL(LOGLEVEL);
166 version_handle_flag("play", OPT_GIVEN(VERSION));
167 handle_help_flags(); /* also handles the zero-arg case */
168 if (OPT_GIVEN(CONFIG_FILE))
169 cf = para_strdup(OPT_STRING_VAL(CONFIG_FILE));
170 else {
171 char *home = para_homedir();
172 cf = make_message("%s/.paraslash/play.conf", home);
173 free(home);
174 }
175 ret = mmap_full_file(cf, O_RDONLY, &map, &sz, NULL);
176 if (ret < 0) {
177 if (ret != -E_EMPTY && ret != -ERRNO_TO_PARA_ERROR(ENOENT))
178 goto free_cf;
179 if (ret == -ERRNO_TO_PARA_ERROR(ENOENT) && OPT_GIVEN(CONFIG_FILE))
180 goto free_cf;
181 ret = 0;
182 goto setup_keymap;
183 }
184 ret = lls(lls_convert_config(map, sz, NULL, &cf_argv, &errctx));
185 para_munmap(map, sz);
186 if (ret < 0)
187 goto free_cf;
188 cf_argc = ret;
189 ret = lls(lls_parse(cf_argc, cf_argv, cmd, &cf_lpr, &errctx));
190 lls_free_argv(cf_argv);
191 if (ret < 0)
192 goto free_cf;
193 ret = lls(lls_merge(play_lpr, cf_lpr, cmd, &merged_lpr, &errctx));
194 lls_free_parse_result(cf_lpr, cmd);
195 if (ret < 0)
196 goto free_cf;
197 lls_free_parse_result(play_lpr, cmd);
198 play_lpr = merged_lpr;
199 loglevel = OPT_UINT32_VAL(LOGLEVEL);
200 setup_keymap:
201 num_kmas = OPT_GIVEN(KEY_MAP);
202 for (i = 0; i < num_kmas; i++) {
203 const char *kma = lls_string_val(i, OPT_RESULT(KEY_MAP));
204 if (*kma && strchr(kma + 1, ':'))
205 continue;
206 PARA_EMERG_LOG("invalid key map arg: %s\n", kma);
207 goto free_cf;
208 }
209 ret = 1;
210 free_cf:
211 free(cf);
212 if (ret >= 0)
213 return;
214 lls_free_parse_result(play_lpr, cmd);
215 fail:
216 if (errctx)
217 PARA_EMERG_LOG("%s\n", errctx);
218 free(errctx);
219 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
220 exit(EXIT_FAILURE);
221 }
222
223 static char get_playback_state(void)
224 {
225 switch (pt->rq) {
226 case CRT_NONE: return pt->playing? 'P' : 'U';
227 case CRT_REPOS: return 'R';
228 case CRT_FILE_CHANGE: return 'F';
229 case CRT_TERM_RQ: return 'X';
230 }
231 assert(false);
232 };
233
234 static long unsigned get_play_time(void)
235 {
236 char state = get_playback_state();
237 long unsigned result;
238
239 if (state != 'P' && state != 'U')
240 return 0;
241 if (pt->num_chunks == 0 || pt->seconds == 0)
242 return 0;
243 /* where the stream started (in seconds) */
244 result = pt->start_chunk * pt->seconds / pt->num_chunks;
245 if (pt->wn.btrn) { /* Add the uptime of the writer node */
246 struct timeval diff = {.tv_sec = 0}, wstime;
247 btr_get_node_start(pt->wn.btrn, &wstime);
248 if (wstime.tv_sec > 0)
249 tv_diff(now, &wstime, &diff);
250 result += diff.tv_sec;
251 }
252 result = PARA_MIN(result, pt->seconds);
253 result = PARA_MAX(result, 0UL);
254 return result;
255 }
256
257
258 static void wipe_receiver_node(void)
259 {
260 PARA_NOTICE_LOG("cleaning up receiver node\n");
261 btr_remove_node(&pt->rn.btrn);
262 AFH_RECV->close(&pt->rn);
263 lls_free_parse_result(pt->rn.lpr, AFH_RECV_CMD);
264 memset(&pt->rn, 0, sizeof(struct receiver_node));
265 }
266
267 /* returns: 0 not eof, 1: eof, < 0: fatal error. */
268 static int get_playback_error(void)
269 {
270 int err;
271
272 if (!pt->wn.task)
273 return 0;
274 err = task_status(pt->wn.task);
275 if (err >= 0)
276 return 0;
277 if (task_status(pt->fn.task) >= 0)
278 return 0;
279 if (task_status(pt->rn.task) >= 0)
280 return 0;
281 if (err == -E_BTR_EOF || err == -E_RECV_EOF || err == -E_EOF
282 || err == -E_WRITE_COMMON_EOF)
283 return 1;
284 return err;
285 }
286
287 static int eof_cleanup(void)
288 {
289 const struct filter *decoder;
290 const struct writer *w = writer_get(-1); /* default writer */
291 int ret;
292
293 ret = get_playback_error();
294 if (ret == 0)
295 return ret;
296 PARA_NOTICE_LOG("cleaning up wn/fn nodes\n");
297 task_reap(&pt->wn.task);
298 w->close(&pt->wn);
299 btr_remove_node(&pt->wn.btrn);
300 lls_free_parse_result(pt->wn.lpr, WRITE_CMD(pt->wn.wid));
301 memset(&pt->wn, 0, sizeof(struct writer_node));
302
303 decoder = filter_get(pt->fn.filter_num);
304 task_reap(&pt->fn.task);
305 if (decoder->close)
306 decoder->close(&pt->fn);
307 btr_remove_node(&pt->fn.btrn);
308 free(pt->fn.conf);
309 memset(&pt->fn, 0, sizeof(struct filter_node));
310
311 task_reap(&pt->rn.task);
312 btr_remove_node(&pt->rn.btrn);
313 /*
314 * On eof (ret > 0), we do not wipe the receiver node struct until a
315 * new file is loaded because we still need it for jumping around when
316 * paused.
317 */
318 if (ret < 0)
319 wipe_receiver_node();
320 return ret;
321 }
322
323 static int shuffle_compare(__a_unused const void *a, __a_unused const void *b)
324 {
325 return para_random(100) - 50;
326 }
327
328 static void init_shuffle_map(void)
329 {
330 unsigned n, num_inputs = lls_num_inputs(play_lpr);
331 shuffle_map = para_malloc(num_inputs * sizeof(unsigned));
332 for (n = 0; n < num_inputs; n++)
333 shuffle_map[n] = n;
334 if (!OPT_GIVEN(RANDOMIZE))
335 return;
336 srandom(time(NULL));
337 qsort(shuffle_map, num_inputs, sizeof(unsigned), shuffle_compare);
338 }
339
340 static struct btr_node *new_recv_btrn(struct receiver_node *rn)
341 {
342 return btr_new_node(&(struct btr_node_description)
343 EMBRACE(.name = lls_command_name(AFH_RECV_CMD), .context = rn,
344 .handler = AFH_RECV->execute));
345 }
346
347 static int open_new_file(void)
348 {
349 int ret;
350 const char *path = get_playlist_file(pt->next_file);
351 char *tmp = para_strdup(path), *errctx;
352 char *argv[] = {"play", "-f", tmp, "-b", "0", NULL};
353
354 PARA_NOTICE_LOG("next file: %s\n", path);
355 wipe_receiver_node();
356 pt->start_chunk = 0;
357 pt->rn.btrn = new_recv_btrn(&pt->rn);
358 ret = lls(lls_parse(ARRAY_SIZE(argv) - 1, argv, AFH_RECV_CMD,
359 &pt->rn.lpr, &errctx));
360 free(tmp);
361 assert(ret >= 0);
362 pt->rn.receiver = AFH_RECV;
363 ret = AFH_RECV->open(&pt->rn);
364 if (ret < 0) {
365 PARA_ERROR_LOG("could not open %s\n", path);
366 goto fail;
367 }
368 pt->audio_format_num = ret;
369 free(pt->afhi_txt);
370 ret = btr_exec_up(pt->rn.btrn, "afhi", &pt->afhi_txt);
371 if (ret < 0)
372 pt->afhi_txt = make_message("[afhi command failed]\n");
373 ret = btr_exec_up(pt->rn.btrn, "seconds_total", &tmp);
374 if (ret < 0)
375 pt->seconds = 1;
376 else {
377 int32_t x;
378 ret = para_atoi32(tmp, &x);
379 pt->seconds = ret < 0? 1 : x;
380 free(tmp);
381 tmp = NULL;
382 }
383 ret = btr_exec_up(pt->rn.btrn, "chunks_total", &tmp);
384 if (ret < 0)
385 pt->num_chunks = 1;
386 else {
387 int32_t x;
388 ret = para_atoi32(tmp, &x);
389 pt->num_chunks = ret < 0? 1 : x;
390 free(tmp);
391 tmp = NULL;
392 }
393 return 1;
394 fail:
395 wipe_receiver_node();
396 return ret;
397 }
398
399 static int load_file(void)
400 {
401 const char *af;
402 char *tmp, buf[20];
403 int ret;
404 const struct filter *decoder;
405 static struct lls_parse_result *filter_lpr, *writer_lpr;
406
407 btr_remove_node(&pt->rn.btrn);
408 if (!pt->rn.receiver || pt->next_file != pt->current_file) {
409 ret = open_new_file();
410 if (ret < 0)
411 return ret;
412 } else {
413 pt->rn.btrn = new_recv_btrn(&pt->rn);
414 sprintf(buf, "repos %lu", pt->start_chunk);
415 ret = btr_exec_up(pt->rn.btrn, buf, &tmp);
416 if (ret < 0)
417 PARA_CRIT_LOG("repos failed: %s\n", para_strerror(-ret));
418 freep(&tmp);
419 }
420 if (!pt->playing)
421 return 0;
422 /* set up decoding filter */
423 af = audio_format_name(pt->audio_format_num);
424 tmp = make_message("%sdec", af);
425 ret = filter_setup(tmp, &pt->fn.conf, &filter_lpr);
426 freep(&tmp);
427 if (ret < 0)
428 goto fail;
429 pt->fn.filter_num = ret;
430 pt->fn.lpr = filter_lpr;
431 decoder = filter_get(ret);
432 pt->fn.btrn = btr_new_node(&(struct btr_node_description)
433 EMBRACE(.name = filter_name(pt->fn.filter_num),
434 .parent = pt->rn.btrn, .handler = decoder->execute,
435 .context = &pt->fn));
436 if (decoder->open)
437 decoder->open(&pt->fn);
438 PARA_INFO_LOG("buffer tree:\n");
439 btr_log_tree(pt->rn.btrn, LL_INFO);
440
441 /* setup default writer */
442 pt->wn.wid = check_writer_arg_or_die(NULL, &writer_lpr);
443 pt->wn.lpr = writer_lpr;
444 /* success, register tasks */
445 pt->rn.task = task_register(
446 &(struct task_info) {
447 .name = lls_command_name(AFH_RECV_CMD),
448 .pre_select = AFH_RECV->pre_select,
449 .post_select = AFH_RECV->post_select,
450 .context = &pt->rn
451 }, &sched);
452 sprintf(buf, "%s decoder", af);
453 pt->fn.task = task_register(
454 &(struct task_info) {
455 .name = buf,
456 .pre_select = decoder->pre_select,
457 .post_select = decoder->post_select,
458 .context = &pt->fn
459 }, &sched);
460 register_writer_node(&pt->wn, pt->fn.btrn, &sched);
461 return 1;
462 fail:
463 wipe_receiver_node();
464 return ret;
465 }
466
467 static int next_valid_file(void)
468 {
469 int i, j = pt->current_file;
470 unsigned num_inputs = lls_num_inputs(play_lpr);
471
472 for (i = 0; i < num_inputs; i++) {
473 j = (j + 1) % num_inputs;
474 if (!pt->invalid[j])
475 return j;
476 }
477 return -E_NO_VALID_FILES;
478 }
479
480 static int load_next_file(void)
481 {
482 int ret;
483
484 again:
485 if (pt->rq == CRT_NONE) {
486 pt->start_chunk = 0;
487 ret = next_valid_file();
488 if (ret < 0)
489 return ret;
490 pt->next_file = ret;
491 } else if (pt->rq == CRT_REPOS)
492 pt->next_file = pt->current_file;
493 ret = load_file();
494 if (ret < 0) {
495 PARA_ERROR_LOG("%s: marking file as invalid\n",
496 para_strerror(-ret));
497 pt->invalid[pt->next_file] = true;
498 pt->rq = CRT_NONE;
499 goto again;
500 }
501 pt->current_file = pt->next_file;
502 pt->rq = CRT_NONE;
503 return ret;
504 }
505
506 static void kill_stream(void)
507 {
508 if (pt->wn.task)
509 task_notify(pt->wn.task, E_EOF);
510 }
511
512 #ifdef HAVE_READLINE
513
514 /* only called from com_prev(), nec. only if we have readline */
515 static int previous_valid_file(void)
516 {
517 int i, j = pt->current_file;
518 unsigned num_inputs = lls_num_inputs(play_lpr);
519
520 for (i = 0; i < num_inputs; i++) {
521 j--;
522 if (j < 0)
523 j = num_inputs - 1;
524 if (!pt->invalid[j])
525 return j;
526 }
527 return -E_NO_VALID_FILES;
528 }
529
530 #include "interactive.h"
531
532 /*
533 * Define the default (internal) key mappings and helper functions to get the
534 * key sequence or the command from a key id, which is what we obtain from
535 * i9e/readline when the key is pressed.
536 *
537 * In some of these helper functions we could return pointers to the constant
538 * arrays defined below. However, for others we can not, so let's better be
539 * consistent and allocate all returned strings on the heap.
540 */
541
542 #define INTERNAL_KEYMAP_ENTRIES \
543 KEYMAP_ENTRY("^", "jmp 0"), \
544 KEYMAP_ENTRY("1", "jmp 10"), \
545 KEYMAP_ENTRY("2", "jmp 21"), \
546 KEYMAP_ENTRY("3", "jmp 32"), \
547 KEYMAP_ENTRY("4", "jmp 43"), \
548 KEYMAP_ENTRY("5", "jmp 54"), \
549 KEYMAP_ENTRY("6", "jmp 65"), \
550 KEYMAP_ENTRY("7", "jmp 76"), \
551 KEYMAP_ENTRY("8", "jmp 87"), \
552 KEYMAP_ENTRY("9", "jmp 98"), \
553 KEYMAP_ENTRY("+", "next"), \
554 KEYMAP_ENTRY("-", "prev"), \
555 KEYMAP_ENTRY(":", "bg"), \
556 KEYMAP_ENTRY("i", "info"), \
557 KEYMAP_ENTRY("l", "ls"), \
558 KEYMAP_ENTRY("s", "play"), \
559 KEYMAP_ENTRY("p", "pause"), \
560 KEYMAP_ENTRY("q", "quit"), \
561 KEYMAP_ENTRY("?", "help"), \
562 KEYMAP_ENTRY("\033[D", "ff -10"), \
563 KEYMAP_ENTRY("\033[C", "ff 10"), \
564 KEYMAP_ENTRY("\033[A", "ff 60"), \
565 KEYMAP_ENTRY("\033[B", "ff -60"), \
566
567 #define KEYMAP_ENTRY(a, b) a
568 static const char *default_keyseqs[] = {INTERNAL_KEYMAP_ENTRIES};
569 #undef KEYMAP_ENTRY
570 #define KEYMAP_ENTRY(a, b) b
571 static const char *default_commands[] = {INTERNAL_KEYMAP_ENTRIES};
572 #undef KEYMAP_ENTRY
573 #define NUM_INTERNALLY_MAPPED_KEYS ARRAY_SIZE(default_commands)
574 #define NUM_MAPPED_KEYS (NUM_INTERNALLY_MAPPED_KEYS + OPT_GIVEN(KEY_MAP))
575 #define FOR_EACH_MAPPED_KEY(i) for (i = 0; i < NUM_MAPPED_KEYS; i++)
576
577 static inline bool is_internal_key(int key)
578 {
579 return key < NUM_INTERNALLY_MAPPED_KEYS;
580 }
581
582 /* for internal keys, the key id is just the array index. */
583 static inline int get_internal_key_map_idx(int key)
584 {
585 assert(is_internal_key(key));
586 return key;
587 }
588
589 /*
590 * For user-defined keys, we have to subtract NUM_INTERNALLY_MAPPED_KEYS. The
591 * difference is the index to the array of user defined key maps.
592 */
593 static inline int get_user_key_map_idx(int key)
594 {
595 assert(!is_internal_key(key));
596 return key - NUM_INTERNALLY_MAPPED_KEYS;
597 }
598
599 static inline int get_key_map_idx(int key)
600 {
601 return is_internal_key(key)?
602 get_internal_key_map_idx(key) : get_user_key_map_idx(key);
603 }
604
605 static inline const char *get_user_key_map_arg(int key)
606 {
607 return lls_string_val(get_user_key_map_idx(key), OPT_RESULT(KEY_MAP));
608 }
609
610 static inline char *get_internal_key_map_seq(int key)
611 {
612 return para_strdup(default_keyseqs[get_internal_key_map_idx(key)]);
613 }
614
615 static char *get_user_key_map_seq(int key)
616 {
617 const char *kma = get_user_key_map_arg(key);
618 const char *p = strchr(kma + 1, ':');
619 char *result;
620 int len;
621
622 if (!p)
623 return NULL;
624 len = p - kma;
625 result = para_malloc(len + 1);
626 memcpy(result, kma, len);
627 result[len] = '\0';
628 return result;
629 }
630
631 static char *get_key_map_seq(int key)
632 {
633 return is_internal_key(key)?
634 get_internal_key_map_seq(key) : get_user_key_map_seq(key);
635 }
636
637 static char *get_key_map_seq_safe(int key)
638 {
639 const char hex[] = "0123456789abcdef";
640 char *seq = get_key_map_seq(key), *sseq;
641 size_t n, len = strlen(seq);
642
643 if (len == 1 && isprint(*seq))
644 return seq;
645 sseq = para_malloc(2 + 2 * len + 1);
646 sseq[0] = '0';
647 sseq[1] = 'x';
648 for (n = 0; n < len; n++) {
649 uint8_t val = (seq[n] & 0xf0) >> 4;
650 sseq[2 + 2 * n] = hex[val];
651 val = seq[n] & 0xf;
652 sseq[2 + 2 * n + 1] = hex[val];
653 }
654 free(seq);
655 sseq[2 + 2 * n] = '\0';
656 return sseq;
657 }
658
659 static inline char *get_internal_key_map_cmd(int key)
660 {
661 return para_strdup(default_commands[get_internal_key_map_idx(key)]);
662 }
663
664 static char *get_user_key_map_cmd(int key)
665 {
666 const char *kma = get_user_key_map_arg(key);
667 const char *p = strchr(kma + 1, ':');
668
669 if (!p)
670 return NULL;
671 return para_strdup(p + 1);
672 }
673
674 static char *get_key_map_cmd(int key)
675 {
676 return is_internal_key(key)?
677 get_internal_key_map_cmd(key) : get_user_key_map_cmd(key);
678 }
679
680 static char **get_mapped_keyseqs(void)
681 {
682 char **result;
683 int i;
684
685 result = para_malloc((NUM_MAPPED_KEYS + 1) * sizeof(char *));
686 FOR_EACH_MAPPED_KEY(i) {
687 char *seq = get_key_map_seq(i);
688 result[i] = seq;
689 }
690 result[i] = NULL;
691 return result;
692 }
693
694 static struct i9e_completer pp_completers[];
695
696 I9E_DUMMY_COMPLETER(jmp);
697 I9E_DUMMY_COMPLETER(next);
698 I9E_DUMMY_COMPLETER(prev);
699 I9E_DUMMY_COMPLETER(fg);
700 I9E_DUMMY_COMPLETER(bg);
701 I9E_DUMMY_COMPLETER(ls);
702 I9E_DUMMY_COMPLETER(info);
703 I9E_DUMMY_COMPLETER(play);
704 I9E_DUMMY_COMPLETER(pause);
705 I9E_DUMMY_COMPLETER(tasks);
706 I9E_DUMMY_COMPLETER(quit);
707 I9E_DUMMY_COMPLETER(ff);
708
709 static void help_completer(struct i9e_completion_info *ci,
710 struct i9e_completion_result *cr)
711 {
712 char *opts[] = {LSG_PLAY_CMD_HELP_OPTS, NULL};
713
714 if (ci->word[0] == '-') {
715 i9e_complete_option(opts, ci, cr);
716 return;
717 }
718 cr->matches = i9e_complete_commands(ci->word, pp_completers);
719 }
720
721 static struct i9e_completer pp_completers[] = {
722 #define LSG_PLAY_CMD_CMD(_name) {.name = #_name, \
723 .completer = _name ## _completer}
724 LSG_PLAY_CMD_SUBCOMMANDS
725 #undef LSG_PLAY_CMD_CMD
726 {.name = NULL}
727 };
728
729 static void attach_stdout(const char *name)
730 {
731 if (pt->btrn)
732 return;
733 pt->btrn = btr_new_node(&(struct btr_node_description)
734 EMBRACE(.name = name));
735 i9e_attach_to_stdout(pt->btrn);
736 }
737
738 static void detach_stdout(void)
739 {
740 btr_remove_node(&pt->btrn);
741 }
742
743 static int com_quit(__a_unused struct lls_parse_result *lpr)
744 {
745 pt->rq = CRT_TERM_RQ;
746 return 0;
747 }
748 EXPORT_PLAY_CMD_HANDLER(quit);
749
750 static int com_help(struct lls_parse_result *lpr)
751 {
752 int i;
753 char *buf;
754 size_t sz;
755 unsigned n;
756 const struct lls_opt_result *r =
757 lls_opt_result(LSG_PLAY_CMD_HELP_OPT_LONG, lpr);
758 bool long_help = lls_opt_given(r);
759
760 if (!pt->background) {
761 FOR_EACH_MAPPED_KEY(i) {
762 bool internal = is_internal_key(i);
763 int idx = get_key_map_idx(i);
764 char *seq = get_key_map_seq_safe(i);
765 char *kmc = get_key_map_cmd(i);
766 sz = xasprintf(&buf, "%s key #%d: %s -> %s\n",
767 internal? "internal" : "user-defined",
768 idx, seq, kmc);
769 btr_add_output(buf, sz, pt->btrn);
770 free(seq);
771 free(kmc);
772 }
773 return 0;
774 }
775 lsu_com_help(long_help, lpr, play_cmd_suite, NULL, &buf, &n);
776 btr_add_output(buf, n, pt->btrn);
777 return 0;
778 }
779 EXPORT_PLAY_CMD_HANDLER(help);
780
781 static int com_info(__a_unused struct lls_parse_result *lpr)
782 {
783 char *buf;
784 size_t sz;
785 static char dflt[] = "[no information available]";
786
787 sz = xasprintf(&buf, "playlist_pos: %u\npath: %s\n",
788 pt->current_file, get_playlist_file(pt->current_file));
789 btr_add_output(buf, sz, pt->btrn);
790 buf = pt->afhi_txt? pt->afhi_txt : dflt;
791 btr_add_output_dont_free(buf, strlen(buf), pt->btrn);
792 return 0;
793 }
794 EXPORT_PLAY_CMD_HANDLER(info);
795
796 static void list_file(int num)
797 {
798 char *buf;
799 size_t sz;
800
801 sz = xasprintf(&buf, "%s %4d %s\n", num == pt->current_file?
802 "*" : " ", num, get_playlist_file(num));
803 btr_add_output(buf, sz, pt->btrn);
804 }
805
806 static int com_tasks(__a_unused struct lls_parse_result *lpr)
807 {
808 static char state;
809 char *buf;
810 size_t sz;
811
812 buf = get_task_list(&sched);
813 btr_add_output(buf, strlen(buf), pt->btrn);
814 state = get_playback_state();
815 sz = xasprintf(&buf, "state: %c\n", state);
816 btr_add_output(buf, sz, pt->btrn);
817 return 0;
818 }
819 EXPORT_PLAY_CMD_HANDLER(tasks);
820
821 static int com_ls(__a_unused struct lls_parse_result *lpr)
822 {
823 int i;
824 unsigned num_inputs = lls_num_inputs(play_lpr);
825
826 for (i = 0; i < num_inputs; i++)
827 list_file(i);
828 return 0;
829 }
830 EXPORT_PLAY_CMD_HANDLER(ls);
831
832 static int com_play(struct lls_parse_result *lpr)
833 {
834 int32_t x;
835 int ret;
836 char state, *errctx;
837
838 ret = lls(lls_check_arg_count(lpr, 0, 1, &errctx));
839 if (ret < 0) {
840 if (errctx)
841 PARA_ERROR_LOG("%s\n", errctx);
842 free(errctx);
843 return ret;
844 }
845 state = get_playback_state();
846 if (lls_num_inputs(lpr) == 0) {
847 if (state == 'P')
848 return 0;
849 pt->next_file = pt->current_file;
850 pt->rq = CRT_REPOS;
851 pt->playing = true;
852 return 0;
853 }
854 ret = para_atoi32(lls_input(0, lpr), &x);
855 if (ret < 0)
856 return ret;
857 if (x < 0 || x >= lls_num_inputs(play_lpr))
858 return -ERRNO_TO_PARA_ERROR(EINVAL);
859 kill_stream();
860 pt->next_file = x;
861 pt->rq = CRT_FILE_CHANGE;
862 return 0;
863 }
864 EXPORT_PLAY_CMD_HANDLER(play);
865
866 static int com_pause(__a_unused struct lls_parse_result *lpr)
867 {
868 char state;
869 long unsigned seconds, ss;
870
871 state = get_playback_state();
872 pt->playing = false;
873 if (state != 'P')
874 return 0;
875 seconds = get_play_time();
876 pt->playing = false;
877 ss = 0;
878 if (pt->seconds > 0)
879 ss = seconds * pt->num_chunks / pt->seconds + 1;
880 ss = PARA_MAX(ss, 0UL);
881 ss = PARA_MIN(ss, pt->num_chunks);
882 pt->start_chunk = ss;
883 kill_stream();
884 return 0;
885 }
886 EXPORT_PLAY_CMD_HANDLER(pause);
887
888 static int com_prev(__a_unused struct lls_parse_result *lpr)
889 {
890 int ret;
891
892 ret = previous_valid_file();
893 if (ret < 0)
894 return ret;
895 kill_stream();
896 pt->next_file = ret;
897 pt->rq = CRT_FILE_CHANGE;
898 pt->start_chunk = 0;
899 return 0;
900 }
901 EXPORT_PLAY_CMD_HANDLER(prev);
902
903 static int com_next(__a_unused struct lls_parse_result *lpr)
904 {
905 int ret;
906
907 ret = next_valid_file();
908 if (ret < 0)
909 return ret;
910 kill_stream();
911 pt->next_file = ret;
912 pt->rq = CRT_FILE_CHANGE;
913 pt->start_chunk = 0;
914 return 0;
915 }
916 EXPORT_PLAY_CMD_HANDLER(next);
917
918 static int com_fg(__a_unused struct lls_parse_result *lpr)
919 {
920 pt->background = false;
921 return 0;
922 }
923 EXPORT_PLAY_CMD_HANDLER(fg);
924
925 static int com_bg(__a_unused struct lls_parse_result *lpr)
926 {
927 pt->background = true;
928 return 0;
929 }
930 EXPORT_PLAY_CMD_HANDLER(bg);
931
932 static int com_jmp(struct lls_parse_result *lpr)
933 {
934 int32_t percent;
935 int ret;
936 char *errctx;
937
938 ret = lls(lls_check_arg_count(lpr, 1, 1, &errctx));
939 if (ret < 0) {
940 if (errctx)
941 PARA_ERROR_LOG("%s\n", errctx);
942 free(errctx);
943 return ret;
944 }
945 ret = para_atoi32(lls_input(0, lpr), &percent);
946 if (ret < 0)
947 return ret;
948 if (percent < 0 || percent > 100)
949 return -ERRNO_TO_PARA_ERROR(EINVAL);
950 if (percent == 100)
951 return com_next(NULL);
952 if (pt->playing && !pt->fn.btrn)
953 return 0;
954 pt->start_chunk = percent * pt->num_chunks / 100;
955 if (!pt->playing)
956 return 0;
957 pt->rq = CRT_REPOS;
958 kill_stream();
959 return 0;
960 }
961 EXPORT_PLAY_CMD_HANDLER(jmp);
962
963 static int com_ff(struct lls_parse_result *lpr)
964 {
965 int32_t seconds;
966 char *errctx;
967 int ret;
968
969 ret = lls(lls_check_arg_count(lpr, 1, 1, &errctx));
970 if (ret < 0) {
971 if (errctx)
972 PARA_ERROR_LOG("%s\n", errctx);
973 free(errctx);
974 return ret;
975 }
976 ret = para_atoi32(lls_input(0, lpr), &seconds);
977 if (ret < 0)
978 return ret;
979 if (pt->playing && !pt->fn.btrn)
980 return 0;
981 seconds += get_play_time();
982 seconds = PARA_MIN(seconds, (typeof(seconds))pt->seconds - 4);
983 seconds = PARA_MAX(seconds, 0);
984 pt->start_chunk = pt->num_chunks * seconds / pt->seconds;
985 pt->start_chunk = PARA_MIN(pt->start_chunk, pt->num_chunks - 1);
986 pt->start_chunk = PARA_MAX(pt->start_chunk, 0UL);
987 if (!pt->playing)
988 return 0;
989 pt->rq = CRT_REPOS;
990 kill_stream();
991 return 0;
992 }
993 EXPORT_PLAY_CMD_HANDLER(ff);
994
995 static int run_command(char *line)
996 {
997 int ret, argc;
998 char **argv = NULL;
999 char *errctx = NULL;
1000 const struct play_command_info *pci;
1001 struct lls_parse_result *lpr;
1002 const struct lls_command *cmd;
1003
1004 attach_stdout(__FUNCTION__);
1005 ret = create_argv(line, " ", &argv);
1006 if (ret < 0)
1007 goto out;
1008 if (ret == 0)
1009 goto out;
1010 argc = ret;
1011 ret = lls(lls_lookup_subcmd(argv[0], play_cmd_suite, &errctx));
1012 if (ret < 0)
1013 goto out;
1014 cmd = lls_cmd(ret, play_cmd_suite);
1015 ret = lls(lls_parse(argc, argv, cmd, &lpr, &errctx));
1016 if (ret < 0)
1017 goto out;
1018 pci = lls_user_data(cmd);
1019 ret = pci->handler(lpr);
1020 lls_free_parse_result(lpr, cmd);
1021 out:
1022 if (errctx)
1023 PARA_ERROR_LOG("%s\n", errctx);
1024 free(errctx);
1025 free_argv(argv);
1026 return ret;
1027 }
1028
1029 static int play_i9e_line_handler(char *line)
1030 {
1031 return run_command(line);
1032 }
1033
1034 static int play_i9e_key_handler(int key)
1035 {
1036 int idx = get_key_map_idx(key);
1037 char *seq = get_key_map_seq(key);
1038 char *cmd = get_key_map_cmd(key);
1039 bool internal = is_internal_key(key);
1040
1041 PARA_NOTICE_LOG("pressed %d: %s key #%d (%s -> %s)\n",
1042 key, internal? "internal" : "user-defined",
1043 idx, seq, cmd);
1044 run_command(cmd);
1045 free(seq);
1046 free(cmd);
1047 pt->next_update = *now;
1048 return 0;
1049 }
1050
1051 static struct i9e_client_info ici = {
1052 .fds = {0, 1, 2},
1053 .prompt = "para_play> ",
1054 .line_handler = play_i9e_line_handler,
1055 .key_handler = play_i9e_key_handler,
1056 .completers = pp_completers,
1057 };
1058
1059 static void sigint_handler(int sig)
1060 {
1061 pt->background = true;
1062 i9e_signal_dispatch(sig);
1063 }
1064
1065 /*
1066 * We start with para_log() set to the standard log function which writes to
1067 * stderr. Once the i9e subsystem has been initialized, we switch to the i9e
1068 * log facility.
1069 */
1070 static void session_open(void)
1071 {
1072 int ret;
1073 char *history_file;
1074 struct sigaction act;
1075
1076 PARA_NOTICE_LOG("\n%s\n", version_text("play"));
1077 if (OPT_GIVEN(HISTORY_FILE))
1078 history_file = para_strdup(OPT_STRING_VAL(HISTORY_FILE));
1079 else {
1080 char *home = para_homedir();
1081 history_file = make_message("%s/.paraslash/play.history",
1082 home);
1083 free(home);
1084 }
1085 ici.history_file = history_file;
1086 ici.loglevel = loglevel;
1087
1088 act.sa_handler = sigint_handler;
1089 sigemptyset(&act.sa_mask);
1090 act.sa_flags = 0;
1091 sigaction(SIGINT, &act, NULL);
1092 act.sa_handler = i9e_signal_dispatch;
1093 sigemptyset(&act.sa_mask);
1094 act.sa_flags = 0;
1095 sigaction(SIGWINCH, &act, NULL);
1096 sched.select_function = i9e_select;
1097
1098 ici.bound_keyseqs = get_mapped_keyseqs();
1099 pt->btrn = ici.producer = btr_new_node(&(struct btr_node_description)
1100 EMBRACE(.name = __FUNCTION__));
1101 ret = i9e_open(&ici, &sched);
1102 if (ret < 0)
1103 goto out;
1104 para_log = i9e_log;
1105 return;
1106 out:
1107 free(history_file);
1108 if (ret >= 0)
1109 return;
1110 PARA_EMERG_LOG("fatal: %s\n", para_strerror(-ret));
1111 exit(EXIT_FAILURE);
1112 }
1113
1114 static void session_update_time_string(char *str, unsigned len)
1115 {
1116 if (pt->background)
1117 return;
1118 if (pt->btrn) {
1119 if (btr_get_output_queue_size(pt->btrn) > 0)
1120 return;
1121 if (btr_get_input_queue_size(pt->btrn) > 0)
1122 return;
1123 }
1124 ie9_print_status_bar(str, len);
1125 }
1126
1127 /*
1128 * If we are about to die we must call i9e_close() to reset the terminal.
1129 * However, i9e_close() must be called in *this* context, i.e. from
1130 * play_task.post_select() rather than from i9e_post_select(), because
1131 * otherwise i9e would access freed memory upon return. So the play task must
1132 * stay alive until the i9e task terminates.
1133 *
1134 * We achieve this by sending a fake SIGTERM signal via i9e_signal_dispatch()
1135 * and reschedule. In the next iteration, i9e->post_select returns an error and
1136 * terminates. Subsequent calls to i9e_get_error() then return negative and we
1137 * are allowed to call i9e_close() and terminate as well.
1138 */
1139 static int session_post_select(__a_unused struct sched *s)
1140 {
1141 int ret;
1142
1143 if (pt->background)
1144 detach_stdout();
1145 else
1146 attach_stdout(__FUNCTION__);
1147 ret = i9e_get_error();
1148 if (ret < 0) {
1149 kill_stream();
1150 i9e_close();
1151 para_log = stderr_log;
1152 free(ici.history_file);
1153 return ret;
1154 }
1155 if (get_playback_state() == 'X')
1156 i9e_signal_dispatch(SIGTERM);
1157 return 0;
1158 }
1159
1160 #else /* HAVE_READLINE */
1161
1162 static int session_post_select(struct sched *s)
1163 {
1164 char c;
1165
1166 if (!FD_ISSET(STDIN_FILENO, &s->rfds))
1167 return 0;
1168 if (read(STDIN_FILENO, &c, 1))
1169 do_nothing;
1170 kill_stream();
1171 return 1;
1172 }
1173
1174 static void session_open(void)
1175 {
1176 }
1177
1178 static void session_update_time_string(char *str, __a_unused unsigned len)
1179 {
1180 printf("\r%s ", str);
1181 fflush(stdout);
1182 }
1183 #endif /* HAVE_READLINE */
1184
1185 static void play_pre_select(struct sched *s, __a_unused void *context)
1186 {
1187 char state;
1188
1189 para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
1190 state = get_playback_state();
1191 if (state == 'R' || state == 'F' || state == 'X')
1192 return sched_min_delay(s);
1193 sched_request_barrier_or_min_delay(&pt->next_update, s);
1194 }
1195
1196 static unsigned get_time_string(char **result)
1197 {
1198 int seconds, length;
1199 char state = get_playback_state();
1200
1201 /* do not return anything if things are about to change */
1202 if (state != 'P' && state != 'U') {
1203 *result = NULL;
1204 return 0;
1205 }
1206 length = pt->seconds;
1207 if (length == 0)
1208 return xasprintf(result, "0:00 [0:00] (0%%/0:00)");
1209 seconds = get_play_time();
1210 return xasprintf(result, "#%u: %d:%02d [%d:%02d] (%d%%/%d:%02d) %s",
1211 pt->current_file,
1212 seconds / 60,
1213 seconds % 60,
1214 (length - seconds) / 60,
1215 (length - seconds) % 60,
1216 length? (seconds * 100 + length / 2) / length : 0,
1217 length / 60,
1218 length % 60,
1219 get_playlist_file(pt->current_file)
1220 );
1221 }
1222
1223 static int play_post_select(struct sched *s, __a_unused void *context)
1224 {
1225 int ret;
1226
1227 ret = eof_cleanup();
1228 if (ret < 0) {
1229 pt->rq = CRT_TERM_RQ;
1230 return 0;
1231 }
1232 ret = session_post_select(s);
1233 if (ret < 0)
1234 goto out;
1235 if (!pt->wn.btrn && !pt->fn.btrn) {
1236 char state = get_playback_state();
1237 if (state == 'P' || state == 'R' || state == 'F') {
1238 PARA_NOTICE_LOG("state: %c\n", state);
1239 ret = load_next_file();
1240 if (ret < 0) {
1241 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1242 pt->rq = CRT_TERM_RQ;
1243 ret = 1;
1244 goto out;
1245 }
1246 pt->next_update = *now;
1247 }
1248 }
1249 if (tv_diff(now, &pt->next_update, NULL) >= 0) {
1250 char *str;
1251 unsigned len = get_time_string(&str);
1252 struct timeval delay = {.tv_sec = 0, .tv_usec = 100 * 1000};
1253 if (str && len > 0)
1254 session_update_time_string(str, len);
1255 free(str);
1256 tv_add(now, &delay, &pt->next_update);
1257 }
1258 ret = 1;
1259 out:
1260 return ret;
1261 }
1262
1263 /**
1264 * The main function of para_play.
1265 *
1266 * \param argc Standard.
1267 * \param argv Standard.
1268 *
1269 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
1270 */
1271 int main(int argc, char *argv[])
1272 {
1273 int ret;
1274 unsigned num_inputs;
1275
1276 /* needed this early to make help work */
1277 recv_init();
1278
1279 sched.default_timeout.tv_sec = 5;
1280 parse_config_or_die(argc, argv);
1281 AFH_RECV->init();
1282 session_open();
1283 num_inputs = lls_num_inputs(play_lpr);
1284 init_shuffle_map();
1285 pt->invalid = para_calloc(sizeof(*pt->invalid) * num_inputs);
1286 pt->rq = CRT_FILE_CHANGE;
1287 pt->current_file = num_inputs - 1;
1288 pt->playing = true;
1289 pt->task = task_register(&(struct task_info){
1290 .name = "play",
1291 .pre_select = play_pre_select,
1292 .post_select = play_post_select,
1293 .context = pt,
1294 }, &sched);
1295 ret = schedule(&sched);
1296 sched_shutdown(&sched);
1297 if (ret < 0)
1298 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1299 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1300 }