Convert writers to lopsub.
[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 <signal.h>
11 #include <inttypes.h>
12 #include <lopsub.h>
13
14 #include "recv_cmd.lsg.h"
15 #include "play_cmd.lsg.h"
16 #include "write_cmd.lsg.h"
17 #include "play.lsg.h"
18 #include "para.h"
19 #include "list.h"
20 #include "error.h"
21 #include "buffer_tree.h"
22 #include "version.h"
23 #include "string.h"
24 #include "sched.h"
25 #include "filter.h"
26 #include "afh.h"
27 #include "recv.h"
28 #include "write.h"
29 #include "fd.h"
30
31 /**
32 * Besides playback tasks which correspond to the receiver/filter/writer nodes,
33 * para_play creates two further tasks: The play task and the i9e task. It is
34 * important whether a function can be called in the context of para_play or
35 * i9e or both. As a rule, all command handlers are called only in i9e context via
36 * the line handler (input mode) or the key handler (command mode) below.
37 *
38 * Playlist handling is done exclusively in play context.
39 */
40
41 /** Array of error strings. */
42 DEFINE_PARA_ERRLIST;
43
44 static struct lls_parse_result *play_lpr;
45
46 #define CMD_PTR (lls_cmd(0, play_suite))
47 #define OPT_RESULT(_name) \
48 (lls_opt_result(LSG_PLAY_PARA_PLAY_OPT_ ## _name, play_lpr))
49 #define OPT_GIVEN(_name) (lls_opt_given(OPT_RESULT(_name)))
50 #define OPT_UINT32_VAL(_name) (lls_uint32_val(0, OPT_RESULT(_name)))
51 #define OPT_STRING_VAL(_name) (lls_string_val(0, OPT_RESULT(_name)))
52
53 /**
54 * Describes a request to change the state of para_play.
55 *
56 * There is only one variable of this type: \a rq of the global play task
57 * structure. Command handlers only set this variable and the post_select()
58 * function of the play task investigates its value during each iteration of
59 * the scheduler run and performs the actual work.
60 */
61 enum state_change_request_type {
62 /** Everybody is happy. */
63 CRT_NONE,
64 /** Stream must be repositioned (com_jmp(), com_ff()). */
65 CRT_REPOS,
66 /** New file should be loaded (com_next()). */
67 CRT_FILE_CHANGE,
68 /** Someone wants us for dead (com_quit()). */
69 CRT_TERM_RQ
70 };
71
72 struct play_task {
73 struct task *task;
74 /* A bit array of invalid files (those will be skipped). */
75 bool *invalid;
76 /* The file which is currently open. */
77 unsigned current_file;
78 /* When to update the status again. */
79 struct timeval next_update;
80
81 /* Root of the buffer tree for command and status output. */
82 struct btr_node *btrn;
83
84 /* The decoding machinery. */
85 struct receiver_node rn;
86 struct filter_node fn;
87 struct writer_node wn;
88
89 /* See comment to enum state_change_request_type above */
90 enum state_change_request_type rq;
91 /* only relevant if rq == CRT_FILE_CHANGE */
92 unsigned next_file;
93 /*
94 bg: read lines at prompt, fg: display status and wait
95 for keystroke.
96 */
97 bool background;
98
99 /* We have the *intention* to play. Set by com_play(). */
100 bool playing;
101
102 /* as returned by afh_recv->open() */
103 int audio_format_num;
104
105 /* retrieved via the btr exec mechanism */
106 long unsigned start_chunk;
107 long unsigned seconds;
108 long unsigned num_chunks;
109 char *afhi_txt;
110 };
111
112 typedef int (*play_cmd_handler_t)(struct play_task *pt,
113 struct lls_parse_result *lpr);
114 struct play_command_info {
115 play_cmd_handler_t handler;
116 };
117 #define EXPORT_PLAY_CMD_HANDLER(_cmd) \
118 const struct play_command_info lsg_play_cmd_com_ ## _cmd ## _user_data = { \
119 .handler = com_ ## _cmd \
120 };
121
122 static int loglevel = LL_WARNING;
123
124 /** The log function which writes log messages to stderr. */
125 INIT_STDERR_LOGGING(loglevel);
126
127 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
128
129 static struct sched sched = {.max_fileno = 0};
130 static struct play_task play_task;
131
132 #define AFH_RECV_CMD (lls_cmd(LSG_RECV_CMD_CMD_AFH, recv_cmd_suite))
133 #define AFH_RECV ((struct receiver *)lls_user_data(AFH_RECV_CMD))
134
135 static unsigned *shuffle_map;
136
137 static const char *get_playlist_file(unsigned idx)
138 {
139 return lls_input(shuffle_map[idx], play_lpr);
140 }
141
142 static void handle_help_flags(void)
143 {
144 char *help;
145
146 if (OPT_GIVEN(DETAILED_HELP))
147 help = lls_long_help(CMD_PTR);
148 else if (OPT_GIVEN(HELP))
149 help = lls_short_help(CMD_PTR);
150 else
151 return;
152 printf("%s\n", help);
153 free(help);
154 exit(EXIT_SUCCESS);
155 }
156
157 static void parse_config_or_die(int argc, char *argv[])
158 {
159 const struct lls_command *cmd = CMD_PTR;
160 int i, ret, cf_argc;
161 char *cf, *errctx, **cf_argv;
162 struct lls_parse_result *cf_lpr, *merged_lpr;
163 unsigned num_kmas;
164 void *map;
165 size_t sz;
166
167 ret = lls(lls_parse(argc, argv, cmd, &play_lpr, &errctx));
168 if (ret < 0)
169 goto fail;
170 loglevel = OPT_UINT32_VAL(LOGLEVEL);
171 version_handle_flag("play", OPT_GIVEN(VERSION));
172 handle_help_flags();
173 if (OPT_GIVEN(CONFIG_FILE))
174 cf = para_strdup(OPT_STRING_VAL(CONFIG_FILE));
175 else {
176 char *home = para_homedir();
177 cf = make_message("%s/.paraslash/play.conf", home);
178 free(home);
179 }
180 ret = mmap_full_file(cf, O_RDONLY, &map, &sz, NULL);
181 if (ret < 0) {
182 if (ret != -E_EMPTY && ret != -ERRNO_TO_PARA_ERROR(ENOENT))
183 goto free_cf;
184 if (ret == -ERRNO_TO_PARA_ERROR(ENOENT) && OPT_GIVEN(CONFIG_FILE))
185 goto free_cf;
186 ret = 0;
187 goto free_cf;
188 }
189 ret = lls(lls_convert_config(map, sz, NULL, &cf_argv, &errctx));
190 para_munmap(map, sz);
191 if (ret < 0)
192 goto free_cf;
193 cf_argc = ret;
194 ret = lls(lls_parse(cf_argc, cf_argv, cmd, &cf_lpr, &errctx));
195 lls_free_argv(cf_argv);
196 if (ret < 0)
197 goto free_cf;
198 ret = lls(lls_merge(play_lpr, cf_lpr, cmd, &merged_lpr, &errctx));
199 lls_free_parse_result(cf_lpr, cmd);
200 if (ret < 0)
201 goto free_cf;
202 lls_free_parse_result(play_lpr, cmd);
203 play_lpr = merged_lpr;
204 loglevel = OPT_UINT32_VAL(LOGLEVEL);
205
206 ret = lls(lls_check_arg_count(play_lpr, 1, INT_MAX, &errctx));
207 if (ret < 0)
208 goto free_cf;
209 num_kmas = OPT_GIVEN(KEY_MAP);
210 for (i = 0; i < num_kmas; i++) {
211 const char *kma = lls_string_val(i, OPT_RESULT(KEY_MAP));
212 if (*kma && strchr(kma + 1, ':'))
213 continue;
214 PARA_EMERG_LOG("invalid key map arg: %s\n", kma);
215 goto free_cf;
216 }
217 ret = 1;
218 free_cf:
219 free(cf);
220 if (ret >= 0)
221 return;
222 lls_free_parse_result(play_lpr, cmd);
223 fail:
224 if (errctx)
225 PARA_EMERG_LOG("%s\n", errctx);
226 free(errctx);
227 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
228 exit(EXIT_FAILURE);
229 }
230
231 static char get_playback_state(struct play_task *pt)
232 {
233 switch (pt->rq) {
234 case CRT_NONE: return pt->playing? 'P' : 'U';
235 case CRT_REPOS: return 'R';
236 case CRT_FILE_CHANGE: return 'F';
237 case CRT_TERM_RQ: return 'X';
238 }
239 assert(false);
240 };
241
242 static long unsigned get_play_time(struct play_task *pt)
243 {
244 char state = get_playback_state(pt);
245 long unsigned result;
246
247 if (state != 'P' && state != 'U')
248 return 0;
249 if (pt->num_chunks == 0 || pt->seconds == 0)
250 return 0;
251 /* where the stream started (in seconds) */
252 result = pt->start_chunk * pt->seconds / pt->num_chunks;
253 if (pt->wn.btrn) { /* Add the uptime of the writer node */
254 struct timeval diff = {.tv_sec = 0}, wstime;
255 btr_get_node_start(pt->wn.btrn, &wstime);
256 if (wstime.tv_sec > 0)
257 tv_diff(now, &wstime, &diff);
258 result += diff.tv_sec;
259 }
260 result = PARA_MIN(result, pt->seconds);
261 result = PARA_MAX(result, 0UL);
262 return result;
263 }
264
265
266 static void wipe_receiver_node(struct play_task *pt)
267 {
268 PARA_NOTICE_LOG("cleaning up receiver node\n");
269 btr_remove_node(&pt->rn.btrn);
270 AFH_RECV->close(&pt->rn);
271 lls_free_parse_result(pt->rn.lpr, AFH_RECV_CMD);
272 memset(&pt->rn, 0, sizeof(struct receiver_node));
273 }
274
275 /* returns: 0 not eof, 1: eof, < 0: fatal error. */
276 static int get_playback_error(struct play_task *pt)
277 {
278 int err;
279
280 if (!pt->wn.task)
281 return 0;
282 err = task_status(pt->wn.task);
283 if (err >= 0)
284 return 0;
285 if (task_status(pt->fn.task) >= 0)
286 return 0;
287 if (task_status(pt->rn.task) >= 0)
288 return 0;
289 if (err == -E_BTR_EOF || err == -E_RECV_EOF || err == -E_EOF
290 || err == -E_WRITE_COMMON_EOF)
291 return 1;
292 return err;
293 }
294
295 static int eof_cleanup(struct play_task *pt)
296 {
297 const struct filter *decoder;
298 const struct writer *w = writer_get(-1); /* default writer */
299 int ret;
300
301 ret = get_playback_error(pt);
302 if (ret == 0)
303 return ret;
304 PARA_NOTICE_LOG("cleaning up wn/fn nodes\n");
305 task_reap(&pt->wn.task);
306 w->close(&pt->wn);
307 btr_remove_node(&pt->wn.btrn);
308 lls_free_parse_result(pt->wn.lpr, WRITE_CMD(pt->wn.wid));
309 memset(&pt->wn, 0, sizeof(struct writer_node));
310
311 decoder = filter_get(pt->fn.filter_num);
312 task_reap(&pt->fn.task);
313 if (decoder->close)
314 decoder->close(&pt->fn);
315 btr_remove_node(&pt->fn.btrn);
316 free(pt->fn.conf);
317 memset(&pt->fn, 0, sizeof(struct filter_node));
318
319 task_reap(&pt->rn.task);
320 btr_remove_node(&pt->rn.btrn);
321 /*
322 * On eof (ret > 0), we do not wipe the receiver node struct until a
323 * new file is loaded because we still need it for jumping around when
324 * paused.
325 */
326 if (ret < 0)
327 wipe_receiver_node(pt);
328 return ret;
329 }
330
331 static int shuffle_compare(__a_unused const void *a, __a_unused const void *b)
332 {
333 return para_random(100) - 50;
334 }
335
336 static void init_shuffle_map(void)
337 {
338 unsigned n, num_inputs = lls_num_inputs(play_lpr);
339 shuffle_map = para_malloc(num_inputs * sizeof(unsigned));
340 for (n = 0; n < num_inputs; n++)
341 shuffle_map[n] = n;
342 if (!OPT_GIVEN(RANDOMIZE))
343 return;
344 srandom(time(NULL));
345 qsort(shuffle_map, num_inputs, sizeof(unsigned), shuffle_compare);
346 }
347
348 static struct btr_node *new_recv_btrn(struct receiver_node *rn)
349 {
350 return btr_new_node(&(struct btr_node_description)
351 EMBRACE(.name = lls_command_name(AFH_RECV_CMD), .context = rn,
352 .handler = AFH_RECV->execute));
353 }
354
355 static int open_new_file(struct play_task *pt)
356 {
357 int ret;
358 const char *path = get_playlist_file(pt->next_file);
359 char *tmp = para_strdup(path), *errctx;
360 char *argv[] = {"play", "-f", tmp, "-b", "0", NULL};
361
362 PARA_NOTICE_LOG("next file: %s\n", path);
363 wipe_receiver_node(pt);
364 pt->start_chunk = 0;
365 pt->rn.btrn = new_recv_btrn(&pt->rn);
366 ret = lls(lls_parse(ARRAY_SIZE(argv) - 1, argv, AFH_RECV_CMD,
367 &pt->rn.lpr, &errctx));
368 free(tmp);
369 assert(ret >= 0);
370 pt->rn.receiver = AFH_RECV;
371 ret = AFH_RECV->open(&pt->rn);
372 if (ret < 0) {
373 PARA_ERROR_LOG("could not open %s\n", path);
374 goto fail;
375 }
376 pt->audio_format_num = ret;
377 free(pt->afhi_txt);
378 ret = btr_exec_up(pt->rn.btrn, "afhi", &pt->afhi_txt);
379 if (ret < 0)
380 pt->afhi_txt = make_message("[afhi command failed]\n");
381 ret = btr_exec_up(pt->rn.btrn, "seconds_total", &tmp);
382 if (ret < 0)
383 pt->seconds = 1;
384 else {
385 int32_t x;
386 ret = para_atoi32(tmp, &x);
387 pt->seconds = ret < 0? 1 : x;
388 free(tmp);
389 tmp = NULL;
390 }
391 ret = btr_exec_up(pt->rn.btrn, "chunks_total", &tmp);
392 if (ret < 0)
393 pt->num_chunks = 1;
394 else {
395 int32_t x;
396 ret = para_atoi32(tmp, &x);
397 pt->num_chunks = ret < 0? 1 : x;
398 free(tmp);
399 tmp = NULL;
400 }
401 return 1;
402 fail:
403 wipe_receiver_node(pt);
404 return ret;
405 }
406
407 static int load_file(struct play_task *pt)
408 {
409 const char *af;
410 char *tmp, buf[20];
411 int ret;
412 const struct filter *decoder;
413 static struct lls_parse_result *filter_lpr, *writer_lpr;
414
415 btr_remove_node(&pt->rn.btrn);
416 if (!pt->rn.receiver || pt->next_file != pt->current_file) {
417 ret = open_new_file(pt);
418 if (ret < 0)
419 return ret;
420 } else {
421 pt->rn.btrn = new_recv_btrn(&pt->rn);
422 sprintf(buf, "repos %lu", pt->start_chunk);
423 ret = btr_exec_up(pt->rn.btrn, buf, &tmp);
424 if (ret < 0)
425 PARA_CRIT_LOG("repos failed: %s\n", para_strerror(-ret));
426 freep(&tmp);
427 }
428 if (!pt->playing)
429 return 0;
430 /* set up decoding filter */
431 af = audio_format_name(pt->audio_format_num);
432 tmp = make_message("%sdec", af);
433 ret = filter_setup(tmp, &pt->fn.conf, &filter_lpr);
434 freep(&tmp);
435 if (ret < 0)
436 goto fail;
437 pt->fn.filter_num = ret;
438 pt->fn.lpr = filter_lpr;
439 decoder = filter_get(ret);
440 pt->fn.btrn = btr_new_node(&(struct btr_node_description)
441 EMBRACE(.name = filter_name(pt->fn.filter_num),
442 .parent = pt->rn.btrn, .handler = decoder->execute,
443 .context = &pt->fn));
444 if (decoder->open)
445 decoder->open(&pt->fn);
446 PARA_INFO_LOG("buffer tree:\n");
447 btr_log_tree(pt->rn.btrn, LL_INFO);
448
449 /* setup default writer */
450 pt->wn.wid = check_writer_arg_or_die(NULL, &writer_lpr);
451 pt->wn.lpr = writer_lpr;
452 /* success, register tasks */
453 pt->rn.task = task_register(
454 &(struct task_info) {
455 .name = lls_command_name(AFH_RECV_CMD),
456 .pre_select = AFH_RECV->pre_select,
457 .post_select = AFH_RECV->post_select,
458 .context = &pt->rn
459 }, &sched);
460 sprintf(buf, "%s decoder", af);
461 pt->fn.task = task_register(
462 &(struct task_info) {
463 .name = buf,
464 .pre_select = decoder->pre_select,
465 .post_select = decoder->post_select,
466 .context = &pt->fn
467 }, &sched);
468 register_writer_node(&pt->wn, pt->fn.btrn, &sched);
469 return 1;
470 fail:
471 wipe_receiver_node(pt);
472 return ret;
473 }
474
475 static int next_valid_file(struct play_task *pt)
476 {
477 int i, j = pt->current_file;
478 unsigned num_inputs = lls_num_inputs(play_lpr);
479
480 for (i = 0; i < num_inputs; i++) {
481 j = (j + 1) % num_inputs;
482 if (!pt->invalid[j])
483 return j;
484 }
485 return -E_NO_VALID_FILES;
486 }
487
488 static int load_next_file(struct play_task *pt)
489 {
490 int ret;
491
492 again:
493 if (pt->rq == CRT_NONE) {
494 pt->start_chunk = 0;
495 ret = next_valid_file(pt);
496 if (ret < 0)
497 return ret;
498 pt->next_file = ret;
499 } else if (pt->rq == CRT_REPOS)
500 pt->next_file = pt->current_file;
501 ret = load_file(pt);
502 if (ret < 0) {
503 PARA_ERROR_LOG("%s: marking file as invalid\n",
504 para_strerror(-ret));
505 pt->invalid[pt->next_file] = true;
506 pt->rq = CRT_NONE;
507 goto again;
508 }
509 pt->current_file = pt->next_file;
510 pt->rq = CRT_NONE;
511 return ret;
512 }
513
514 static void kill_stream(struct play_task *pt)
515 {
516 if (pt->wn.task)
517 task_notify(pt->wn.task, E_EOF);
518 }
519
520 #ifdef HAVE_READLINE
521
522 /* only called from com_prev(), nec. only if we have readline */
523 static int previous_valid_file(struct play_task *pt)
524 {
525 int i, j = pt->current_file;
526 unsigned num_inputs = lls_num_inputs(play_lpr);
527
528 for (i = 0; i < num_inputs; i++) {
529 j--;
530 if (j < 0)
531 j = num_inputs - 1;
532 if (!pt->invalid[j])
533 return j;
534 }
535 return -E_NO_VALID_FILES;
536 }
537
538 #include "interactive.h"
539
540 /*
541 * Define the default (internal) key mappings and helper functions to get the
542 * key sequence or the command from a key id, which is what we obtain from
543 * i9e/readline when the key is pressed.
544 *
545 * In some of these helper functions we could return pointers to the constant
546 * arrays defined below. However, for others we can not, so let's better be
547 * consistent and allocate all returned strings on the heap.
548 */
549
550 #define INTERNAL_KEYMAP_ENTRIES \
551 KEYMAP_ENTRY("^", "jmp 0"), \
552 KEYMAP_ENTRY("1", "jmp 10"), \
553 KEYMAP_ENTRY("2", "jmp 21"), \
554 KEYMAP_ENTRY("3", "jmp 32"), \
555 KEYMAP_ENTRY("4", "jmp 43"), \
556 KEYMAP_ENTRY("5", "jmp 54"), \
557 KEYMAP_ENTRY("6", "jmp 65"), \
558 KEYMAP_ENTRY("7", "jmp 76"), \
559 KEYMAP_ENTRY("8", "jmp 87"), \
560 KEYMAP_ENTRY("9", "jmp 98"), \
561 KEYMAP_ENTRY("+", "next"), \
562 KEYMAP_ENTRY("-", "prev"), \
563 KEYMAP_ENTRY(":", "bg"), \
564 KEYMAP_ENTRY("i", "info"), \
565 KEYMAP_ENTRY("l", "ls"), \
566 KEYMAP_ENTRY("s", "play"), \
567 KEYMAP_ENTRY("p", "pause"), \
568 KEYMAP_ENTRY("q", "quit"), \
569 KEYMAP_ENTRY("?", "help"), \
570 KEYMAP_ENTRY("\033[D", "ff -10"), \
571 KEYMAP_ENTRY("\033[C", "ff 10"), \
572 KEYMAP_ENTRY("\033[A", "ff 60"), \
573 KEYMAP_ENTRY("\033[B", "ff -60"), \
574
575 #define KEYMAP_ENTRY(a, b) a
576 static const char *default_keyseqs[] = {INTERNAL_KEYMAP_ENTRIES};
577 #undef KEYMAP_ENTRY
578 #define KEYMAP_ENTRY(a, b) b
579 static const char *default_commands[] = {INTERNAL_KEYMAP_ENTRIES};
580 #undef KEYMAP_ENTRY
581 #define NUM_INTERNALLY_MAPPED_KEYS ARRAY_SIZE(default_commands)
582 #define NUM_MAPPED_KEYS (NUM_INTERNALLY_MAPPED_KEYS + OPT_GIVEN(KEY_MAP))
583 #define FOR_EACH_MAPPED_KEY(i) for (i = 0; i < NUM_MAPPED_KEYS; i++)
584
585 static inline bool is_internal_key(int key)
586 {
587 return key < NUM_INTERNALLY_MAPPED_KEYS;
588 }
589
590 /* for internal keys, the key id is just the array index. */
591 static inline int get_internal_key_map_idx(int key)
592 {
593 assert(is_internal_key(key));
594 return key;
595 }
596
597 /*
598 * For user-defined keys, we have to subtract NUM_INTERNALLY_MAPPED_KEYS. The
599 * difference is the index to the array of user defined key maps.
600 */
601 static inline int get_user_key_map_idx(int key)
602 {
603 assert(!is_internal_key(key));
604 return key - NUM_INTERNALLY_MAPPED_KEYS;
605 }
606
607 static inline int get_key_map_idx(int key)
608 {
609 return is_internal_key(key)?
610 get_internal_key_map_idx(key) : get_user_key_map_idx(key);
611 }
612
613 static inline const char *get_user_key_map_arg(int key)
614 {
615 return lls_string_val(get_user_key_map_idx(key), OPT_RESULT(KEY_MAP));
616 }
617
618 static inline char *get_internal_key_map_seq(int key)
619 {
620 return para_strdup(default_keyseqs[get_internal_key_map_idx(key)]);
621 }
622
623 static char *get_user_key_map_seq(int key)
624 {
625 const char *kma = get_user_key_map_arg(key);
626 const char *p = strchr(kma + 1, ':');
627 char *result;
628 int len;
629
630 if (!p)
631 return NULL;
632 len = p - kma;
633 result = para_malloc(len + 1);
634 memcpy(result, kma, len);
635 result[len] = '\0';
636 return result;
637 }
638
639 static char *get_key_map_seq(int key)
640 {
641 return is_internal_key(key)?
642 get_internal_key_map_seq(key) : get_user_key_map_seq(key);
643 }
644
645 static char *get_key_map_seq_safe(int key)
646 {
647 const char hex[] = "0123456789abcdef";
648 char *seq = get_key_map_seq(key), *sseq;
649 size_t n, len = strlen(seq);
650
651 if (len == 1 && isprint(*seq))
652 return seq;
653 sseq = para_malloc(2 + 2 * len + 1);
654 sseq[0] = '0';
655 sseq[1] = 'x';
656 for (n = 0; n < len; n++) {
657 uint8_t val = (seq[n] & 0xf0) >> 4;
658 sseq[2 + 2 * n] = hex[val];
659 val = seq[n] & 0xf;
660 sseq[2 + 2 * n + 1] = hex[val];
661 }
662 free(seq);
663 sseq[2 + 2 * n] = '\0';
664 return sseq;
665 }
666
667 static inline char *get_internal_key_map_cmd(int key)
668 {
669 return para_strdup(default_commands[get_internal_key_map_idx(key)]);
670 }
671
672 static char *get_user_key_map_cmd(int key)
673 {
674 const char *kma = get_user_key_map_arg(key);
675 const char *p = strchr(kma + 1, ':');
676
677 if (!p)
678 return NULL;
679 return para_strdup(p + 1);
680 }
681
682 static char *get_key_map_cmd(int key)
683 {
684 return is_internal_key(key)?
685 get_internal_key_map_cmd(key) : get_user_key_map_cmd(key);
686 }
687
688 static char **get_mapped_keyseqs(void)
689 {
690 char **result;
691 int i;
692
693 result = para_malloc((NUM_MAPPED_KEYS + 1) * sizeof(char *));
694 FOR_EACH_MAPPED_KEY(i) {
695 char *seq = get_key_map_seq(i);
696 result[i] = seq;
697 }
698 result[i] = NULL;
699 return result;
700 }
701
702 static struct i9e_completer pp_completers[];
703
704 I9E_DUMMY_COMPLETER(jmp);
705 I9E_DUMMY_COMPLETER(next);
706 I9E_DUMMY_COMPLETER(prev);
707 I9E_DUMMY_COMPLETER(fg);
708 I9E_DUMMY_COMPLETER(bg);
709 I9E_DUMMY_COMPLETER(ls);
710 I9E_DUMMY_COMPLETER(info);
711 I9E_DUMMY_COMPLETER(play);
712 I9E_DUMMY_COMPLETER(pause);
713 I9E_DUMMY_COMPLETER(stop);
714 I9E_DUMMY_COMPLETER(tasks);
715 I9E_DUMMY_COMPLETER(quit);
716 I9E_DUMMY_COMPLETER(ff);
717
718 static void help_completer(struct i9e_completion_info *ci,
719 struct i9e_completion_result *result)
720 {
721 result->matches = i9e_complete_commands(ci->word, pp_completers);
722 }
723
724 I9E_DUMMY_COMPLETER(SUPERCOMMAND_UNAVAILABLE);
725 static struct i9e_completer pp_completers[] = {
726 #define LSG_PLAY_CMD_CMD(_name) {.name = #_name, \
727 .completer = _name ## _completer}
728 LSG_PLAY_CMD_SUBCOMMANDS
729 #undef LSG_PLAY_CMD_CMD
730 {.name = NULL}
731 };
732
733 static void attach_stdout(struct play_task *pt, const char *name)
734 {
735 if (pt->btrn)
736 return;
737 pt->btrn = btr_new_node(&(struct btr_node_description)
738 EMBRACE(.name = name));
739 i9e_attach_to_stdout(pt->btrn);
740 }
741
742 static void detach_stdout(struct play_task *pt)
743 {
744 btr_remove_node(&pt->btrn);
745 }
746
747 static int com_quit(struct play_task *pt,
748 __a_unused struct lls_parse_result *lpr)
749 {
750 pt->rq = CRT_TERM_RQ;
751 return 0;
752 }
753 EXPORT_PLAY_CMD_HANDLER(quit);
754
755 static int com_help(struct play_task *pt, struct lls_parse_result *lpr)
756 {
757 int i, ret;
758 char *buf, *errctx;
759 size_t sz;
760 const struct lls_command *cmd;
761
762 ret = lls(lls_check_arg_count(lpr, 0, 1, &errctx));
763 if (ret < 0) {
764 if (errctx)
765 PARA_ERROR_LOG("%s\n", errctx);
766 free(errctx);
767 return ret;
768 }
769 if (lls_num_inputs(lpr) == 0) {
770 if (pt->background) {
771 for (i = 1; (cmd = lls_cmd(i, play_cmd_suite)); i++) {
772 sz = xasprintf(&buf, "%s\t%s\n",
773 lls_command_name(cmd), lls_purpose(cmd));
774 btr_add_output(buf, sz, pt->btrn);
775 }
776 return 0;
777 }
778 FOR_EACH_MAPPED_KEY(i) {
779 bool internal = is_internal_key(i);
780 int idx = get_key_map_idx(i);
781 char *seq = get_key_map_seq_safe(i);
782 char *kmc = get_key_map_cmd(i);
783 sz = xasprintf(&buf, "%s key #%d: %s -> %s\n",
784 internal? "internal" : "user-defined",
785 idx, seq, kmc);
786 btr_add_output(buf, sz, pt->btrn);
787 free(seq);
788 free(kmc);
789 }
790 return 0;
791 }
792 ret = lls(lls_lookup_subcmd(lls_input(0, lpr), play_cmd_suite,
793 &errctx));
794 if (ret < 0) {
795 if (errctx)
796 PARA_ERROR_LOG("%s\n", errctx);
797 free(errctx);
798 return ret;
799 }
800 cmd = lls_cmd(ret, play_cmd_suite);
801 buf = lls_long_help(cmd);
802 assert(buf);
803 btr_add_output(buf, strlen(buf), pt->btrn);
804 return 0;
805 }
806 EXPORT_PLAY_CMD_HANDLER(help);
807
808 static int com_info(struct play_task *pt,
809 __a_unused struct lls_parse_result *lpr)
810 {
811 char *buf;
812 size_t sz;
813 static char dflt[] = "[no information available]";
814
815 sz = xasprintf(&buf, "playlist_pos: %u\npath: %s\n",
816 pt->current_file, get_playlist_file(pt->current_file));
817 btr_add_output(buf, sz, pt->btrn);
818 buf = pt->afhi_txt? pt->afhi_txt : dflt;
819 btr_add_output_dont_free(buf, strlen(buf), pt->btrn);
820 return 0;
821 }
822 EXPORT_PLAY_CMD_HANDLER(info);
823
824 static void list_file(struct play_task *pt, int num)
825 {
826 char *buf;
827 size_t sz;
828
829 sz = xasprintf(&buf, "%s %4d %s\n", num == pt->current_file?
830 "*" : " ", num, get_playlist_file(num));
831 btr_add_output(buf, sz, pt->btrn);
832 }
833
834 static int com_tasks(struct play_task *pt,
835 __a_unused struct lls_parse_result *lpr)
836 {
837 static char state;
838 char *buf;
839 size_t sz;
840
841 buf = get_task_list(&sched);
842 btr_add_output(buf, strlen(buf), pt->btrn);
843 state = get_playback_state(pt);
844 sz = xasprintf(&buf, "state: %c\n", state);
845 btr_add_output(buf, sz, pt->btrn);
846 return 0;
847 }
848 EXPORT_PLAY_CMD_HANDLER(tasks);
849
850 static int com_ls(struct play_task *pt,
851 __a_unused struct lls_parse_result *lpr)
852 {
853 int i;
854 unsigned num_inputs = lls_num_inputs(play_lpr);
855
856 for (i = 0; i < num_inputs; i++)
857 list_file(pt, i);
858 return 0;
859 }
860 EXPORT_PLAY_CMD_HANDLER(ls);
861
862 static int com_play(struct play_task *pt, struct lls_parse_result *lpr)
863 {
864 int32_t x;
865 int ret;
866 char state, *errctx;
867
868 ret = lls(lls_check_arg_count(lpr, 0, 1, &errctx));
869 if (ret < 0) {
870 if (errctx)
871 PARA_ERROR_LOG("%s\n", errctx);
872 free(errctx);
873 return ret;
874 }
875 state = get_playback_state(pt);
876 if (lls_num_inputs(lpr) == 0) {
877 if (state == 'P')
878 return 0;
879 pt->next_file = pt->current_file;
880 pt->rq = CRT_REPOS;
881 pt->playing = true;
882 return 0;
883 }
884 ret = para_atoi32(lls_input(0, lpr), &x);
885 if (ret < 0)
886 return ret;
887 if (x < 0 || x >= lls_num_inputs(play_lpr))
888 return -ERRNO_TO_PARA_ERROR(EINVAL);
889 kill_stream(pt);
890 pt->next_file = x;
891 pt->rq = CRT_FILE_CHANGE;
892 return 0;
893 }
894 EXPORT_PLAY_CMD_HANDLER(play);
895
896 static int com_pause(struct play_task *pt,
897 __a_unused struct lls_parse_result *lpr)
898 {
899 char state;
900 long unsigned seconds, ss;
901
902 state = get_playback_state(pt);
903 pt->playing = false;
904 if (state != 'P')
905 return 0;
906 seconds = get_play_time(pt);
907 pt->playing = false;
908 ss = 0;
909 if (pt->seconds > 0)
910 ss = seconds * pt->num_chunks / pt->seconds + 1;
911 ss = PARA_MAX(ss, 0UL);
912 ss = PARA_MIN(ss, pt->num_chunks);
913 pt->start_chunk = ss;
914 kill_stream(pt);
915 return 0;
916 }
917 EXPORT_PLAY_CMD_HANDLER(pause);
918
919 static int com_prev(struct play_task *pt,
920 __a_unused struct lls_parse_result *lpr)
921 {
922 int ret;
923
924 ret = previous_valid_file(pt);
925 if (ret < 0)
926 return ret;
927 kill_stream(pt);
928 pt->next_file = ret;
929 pt->rq = CRT_FILE_CHANGE;
930 pt->start_chunk = 0;
931 return 0;
932 }
933 EXPORT_PLAY_CMD_HANDLER(prev);
934
935 static int com_next(struct play_task *pt,
936 __a_unused struct lls_parse_result *lpr)
937 {
938 int ret;
939
940 ret = next_valid_file(pt);
941 if (ret < 0)
942 return ret;
943 kill_stream(pt);
944 pt->next_file = ret;
945 pt->rq = CRT_FILE_CHANGE;
946 pt->start_chunk = 0;
947 return 0;
948 }
949 EXPORT_PLAY_CMD_HANDLER(next);
950
951 static int com_fg(struct play_task *pt,
952 __a_unused struct lls_parse_result *lpr)
953 {
954 pt->background = false;
955 return 0;
956 }
957 EXPORT_PLAY_CMD_HANDLER(fg);
958
959 static int com_bg(struct play_task *pt,
960 __a_unused struct lls_parse_result *lpr)
961 {
962 pt->background = true;
963 return 0;
964 }
965 EXPORT_PLAY_CMD_HANDLER(bg);
966
967 static int com_jmp(struct play_task *pt, struct lls_parse_result *lpr)
968 {
969 int32_t percent;
970 int ret;
971 char *errctx;
972
973 ret = lls(lls_check_arg_count(lpr, 1, 1, &errctx));
974 if (ret < 0) {
975 if (errctx)
976 PARA_ERROR_LOG("%s\n", errctx);
977 free(errctx);
978 return ret;
979 }
980 ret = para_atoi32(lls_input(0, lpr), &percent);
981 if (ret < 0)
982 return ret;
983 if (percent < 0 || percent > 100)
984 return -ERRNO_TO_PARA_ERROR(EINVAL);
985 if (percent == 100)
986 return com_next(pt, NULL);
987 if (pt->playing && !pt->fn.btrn)
988 return 0;
989 pt->start_chunk = percent * pt->num_chunks / 100;
990 if (!pt->playing)
991 return 0;
992 pt->rq = CRT_REPOS;
993 kill_stream(pt);
994 return 0;
995 }
996 EXPORT_PLAY_CMD_HANDLER(jmp);
997
998 static int com_ff(struct play_task *pt, struct lls_parse_result *lpr)
999 {
1000 int32_t seconds;
1001 char *errctx;
1002 int ret;
1003
1004 ret = lls(lls_check_arg_count(lpr, 1, 1, &errctx));
1005 if (ret < 0) {
1006 if (errctx)
1007 PARA_ERROR_LOG("%s\n", errctx);
1008 free(errctx);
1009 return ret;
1010 }
1011 ret = para_atoi32(lls_input(0, lpr), &seconds);
1012 if (ret < 0)
1013 return ret;
1014 if (pt->playing && !pt->fn.btrn)
1015 return 0;
1016 seconds += get_play_time(pt);
1017 seconds = PARA_MIN(seconds, (typeof(seconds))pt->seconds - 4);
1018 seconds = PARA_MAX(seconds, 0);
1019 pt->start_chunk = pt->num_chunks * seconds / pt->seconds;
1020 pt->start_chunk = PARA_MIN(pt->start_chunk, pt->num_chunks - 1);
1021 pt->start_chunk = PARA_MAX(pt->start_chunk, 0UL);
1022 if (!pt->playing)
1023 return 0;
1024 pt->rq = CRT_REPOS;
1025 kill_stream(pt);
1026 return 0;
1027 }
1028 EXPORT_PLAY_CMD_HANDLER(ff);
1029
1030 static int run_command(char *line, struct play_task *pt)
1031 {
1032 int ret, argc;
1033 char **argv = NULL;
1034 char *errctx = NULL;
1035 const struct play_command_info *pci;
1036 struct lls_parse_result *lpr;
1037 const struct lls_command *cmd;
1038
1039 attach_stdout(pt, __FUNCTION__);
1040 ret = create_argv(line, " ", &argv);
1041 if (ret < 0)
1042 goto out;
1043 if (ret == 0)
1044 goto out;
1045 argc = ret;
1046 ret = lls(lls_lookup_subcmd(argv[0], play_cmd_suite, &errctx));
1047 if (ret < 0)
1048 goto out;
1049 cmd = lls_cmd(ret, play_cmd_suite);
1050 ret = lls(lls_parse(argc, argv, cmd, &lpr, &errctx));
1051 if (ret < 0)
1052 goto out;
1053 pci = lls_user_data(cmd);
1054 ret = pci->handler(pt, lpr);
1055 lls_free_parse_result(lpr, cmd);
1056 out:
1057 if (errctx)
1058 PARA_ERROR_LOG("%s\n", errctx);
1059 free(errctx);
1060 free_argv(argv);
1061 return ret;
1062 }
1063
1064 static int play_i9e_line_handler(char *line)
1065 {
1066 return run_command(line, &play_task);
1067 }
1068
1069 static int play_i9e_key_handler(int key)
1070 {
1071 struct play_task *pt = &play_task;
1072 int idx = get_key_map_idx(key);
1073 char *seq = get_key_map_seq(key);
1074 char *cmd = get_key_map_cmd(key);
1075 bool internal = is_internal_key(key);
1076
1077 PARA_NOTICE_LOG("pressed %d: %s key #%d (%s -> %s)\n",
1078 key, internal? "internal" : "user-defined",
1079 idx, seq, cmd);
1080 run_command(cmd, pt);
1081 free(seq);
1082 free(cmd);
1083 pt->next_update = *now;
1084 return 0;
1085 }
1086
1087 static struct i9e_client_info ici = {
1088 .fds = {0, 1, 2},
1089 .prompt = "para_play> ",
1090 .line_handler = play_i9e_line_handler,
1091 .key_handler = play_i9e_key_handler,
1092 .completers = pp_completers,
1093 };
1094
1095 static void sigint_handler(int sig)
1096 {
1097 play_task.background = true;
1098 i9e_signal_dispatch(sig);
1099 }
1100
1101 /*
1102 * We start with para_log() set to the standard log function which writes to
1103 * stderr. Once the i9e subsystem has been initialized, we switch to the i9e
1104 * log facility.
1105 */
1106 static void session_open(struct play_task *pt)
1107 {
1108 int ret;
1109 char *history_file;
1110 struct sigaction act;
1111
1112 PARA_NOTICE_LOG("\n%s\n", version_text("play"));
1113 if (OPT_GIVEN(HISTORY_FILE))
1114 history_file = para_strdup(OPT_STRING_VAL(HISTORY_FILE));
1115 else {
1116 char *home = para_homedir();
1117 history_file = make_message("%s/.paraslash/play.history",
1118 home);
1119 free(home);
1120 }
1121 ici.history_file = history_file;
1122 ici.loglevel = loglevel;
1123
1124 act.sa_handler = sigint_handler;
1125 sigemptyset(&act.sa_mask);
1126 act.sa_flags = 0;
1127 sigaction(SIGINT, &act, NULL);
1128 act.sa_handler = i9e_signal_dispatch;
1129 sigemptyset(&act.sa_mask);
1130 act.sa_flags = 0;
1131 sigaction(SIGWINCH, &act, NULL);
1132 sched.select_function = i9e_select;
1133
1134 ici.bound_keyseqs = get_mapped_keyseqs();
1135 pt->btrn = ici.producer = btr_new_node(&(struct btr_node_description)
1136 EMBRACE(.name = __FUNCTION__));
1137 ret = i9e_open(&ici, &sched);
1138 if (ret < 0)
1139 goto out;
1140 para_log = i9e_log;
1141 return;
1142 out:
1143 free(history_file);
1144 if (ret >= 0)
1145 return;
1146 PARA_EMERG_LOG("fatal: %s\n", para_strerror(-ret));
1147 exit(EXIT_FAILURE);
1148 }
1149
1150 static void session_update_time_string(struct play_task *pt, char *str, unsigned len)
1151 {
1152 if (pt->background)
1153 return;
1154 if (pt->btrn) {
1155 if (btr_get_output_queue_size(pt->btrn) > 0)
1156 return;
1157 if (btr_get_input_queue_size(pt->btrn) > 0)
1158 return;
1159 }
1160 ie9_print_status_bar(str, len);
1161 }
1162
1163 /*
1164 * If we are about to die we must call i9e_close() to reset the terminal.
1165 * However, i9e_close() must be called in *this* context, i.e. from
1166 * play_task.post_select() rather than from i9e_post_select(), because
1167 * otherwise i9e would access freed memory upon return. So the play task must
1168 * stay alive until the i9e task terminates.
1169 *
1170 * We achieve this by sending a fake SIGTERM signal via i9e_signal_dispatch()
1171 * and reschedule. In the next iteration, i9e->post_select returns an error and
1172 * terminates. Subsequent calls to i9e_get_error() then return negative and we
1173 * are allowed to call i9e_close() and terminate as well.
1174 */
1175 static int session_post_select(__a_unused struct sched *s, struct play_task *pt)
1176 {
1177 int ret;
1178
1179 if (pt->background)
1180 detach_stdout(pt);
1181 else
1182 attach_stdout(pt, __FUNCTION__);
1183 ret = i9e_get_error();
1184 if (ret < 0) {
1185 kill_stream(pt);
1186 i9e_close();
1187 para_log = stderr_log;
1188 free(ici.history_file);
1189 return ret;
1190 }
1191 if (get_playback_state(pt) == 'X')
1192 i9e_signal_dispatch(SIGTERM);
1193 return 0;
1194 }
1195
1196 #else /* HAVE_READLINE */
1197
1198 static int session_post_select(struct sched *s, struct play_task *pt)
1199 {
1200 char c;
1201
1202 if (!FD_ISSET(STDIN_FILENO, &s->rfds))
1203 return 0;
1204 if (read(STDIN_FILENO, &c, 1))
1205 do_nothing;
1206 kill_stream(pt);
1207 return 1;
1208 }
1209
1210 static void session_open(__a_unused struct play_task *pt)
1211 {
1212 }
1213
1214 static void session_update_time_string(__a_unused struct play_task *pt,
1215 char *str, __a_unused unsigned len)
1216 {
1217 printf("\r%s ", str);
1218 fflush(stdout);
1219 }
1220 #endif /* HAVE_READLINE */
1221
1222 static void play_pre_select(struct sched *s, void *context)
1223 {
1224 struct play_task *pt = context;
1225 char state;
1226
1227 para_fd_set(STDIN_FILENO, &s->rfds, &s->max_fileno);
1228 state = get_playback_state(pt);
1229 if (state == 'R' || state == 'F' || state == 'X')
1230 return sched_min_delay(s);
1231 sched_request_barrier_or_min_delay(&pt->next_update, s);
1232 }
1233
1234 static unsigned get_time_string(struct play_task *pt, char **result)
1235 {
1236 int seconds, length;
1237 char state = get_playback_state(pt);
1238
1239 /* do not return anything if things are about to change */
1240 if (state != 'P' && state != 'U') {
1241 *result = NULL;
1242 return 0;
1243 }
1244 length = pt->seconds;
1245 if (length == 0)
1246 return xasprintf(result, "0:00 [0:00] (0%%/0:00)");
1247 seconds = get_play_time(pt);
1248 return xasprintf(result, "#%u: %d:%02d [%d:%02d] (%d%%/%d:%02d) %s",
1249 pt->current_file,
1250 seconds / 60,
1251 seconds % 60,
1252 (length - seconds) / 60,
1253 (length - seconds) % 60,
1254 length? (seconds * 100 + length / 2) / length : 0,
1255 length / 60,
1256 length % 60,
1257 get_playlist_file(pt->current_file)
1258 );
1259 }
1260
1261 static int play_post_select(struct sched *s, void *context)
1262 {
1263 struct play_task *pt = context;
1264 int ret;
1265
1266 ret = eof_cleanup(pt);
1267 if (ret < 0) {
1268 pt->rq = CRT_TERM_RQ;
1269 return 0;
1270 }
1271 ret = session_post_select(s, pt);
1272 if (ret < 0)
1273 goto out;
1274 if (!pt->wn.btrn && !pt->fn.btrn) {
1275 char state = get_playback_state(pt);
1276 if (state == 'P' || state == 'R' || state == 'F') {
1277 PARA_NOTICE_LOG("state: %c\n", state);
1278 ret = load_next_file(pt);
1279 if (ret < 0) {
1280 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1281 pt->rq = CRT_TERM_RQ;
1282 ret = 1;
1283 goto out;
1284 }
1285 pt->next_update = *now;
1286 }
1287 }
1288 if (tv_diff(now, &pt->next_update, NULL) >= 0) {
1289 char *str;
1290 unsigned len = get_time_string(pt, &str);
1291 struct timeval delay = {.tv_sec = 0, .tv_usec = 100 * 1000};
1292 if (str && len > 0)
1293 session_update_time_string(pt, str, len);
1294 free(str);
1295 tv_add(now, &delay, &pt->next_update);
1296 }
1297 ret = 1;
1298 out:
1299 return ret;
1300 }
1301
1302 /**
1303 * The main function of para_play.
1304 *
1305 * \param argc Standard.
1306 * \param argv Standard.
1307 *
1308 * \return \p EXIT_FAILURE or \p EXIT_SUCCESS.
1309 */
1310 int main(int argc, char *argv[])
1311 {
1312 int ret;
1313 struct play_task *pt = &play_task;
1314 unsigned num_inputs;
1315
1316 /* needed this early to make help work */
1317 recv_init();
1318
1319 sched.default_timeout.tv_sec = 5;
1320 parse_config_or_die(argc, argv);
1321 AFH_RECV->init();
1322 session_open(pt);
1323 num_inputs = lls_num_inputs(play_lpr);
1324 init_shuffle_map();
1325 pt->invalid = para_calloc(sizeof(*pt->invalid) * num_inputs);
1326 pt->rq = CRT_FILE_CHANGE;
1327 pt->current_file = num_inputs - 1;
1328 pt->playing = true;
1329 pt->task = task_register(&(struct task_info){
1330 .name = "play",
1331 .pre_select = play_pre_select,
1332 .post_select = play_post_select,
1333 .context = pt,
1334 }, &sched);
1335 ret = schedule(&sched);
1336 sched_shutdown(&sched);
1337 if (ret < 0)
1338 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
1339 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
1340 }