application/player.c

   1 /*
   2  * Copyright 2022 Olaf Wintermann
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include "player.h"
  24 #include "main.h"
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <sys/fcntl.h>
  30 #include <spawn.h>
  31 #include <sys/wait.h>
  32 #include <signal.h>
  33 #include <poll.h>
  34 #include <fcntl.h>
  35 #include <sys/stat.h>
  36 #include <errno.h>
  37 #include <sys/socket.h>
  38 #include <sys/un.h>
  39 #include <pthread.h>
  40
  41 #include "json.h"
  42 #include "utils.h"
  43 #include "settings.h"
  44
  45 extern char **environ;
  46
  47 #define STR_BUFSIZE 512
  48 #define WID_ARG_BUFSIZE 24
  49
  50 #define PLAYER_POLL_TIMEOUT 500
  51 #define PLAYER_IN_BUFSIZE   8192
  52
  53 static void json_print(JSONValue *value, char *name, int indent);
  54
  55 static void* start_player(void *data);
  56
  57 static void player_io(Player *p);
  58
  59 static void handle_json_rpc_msg(Player *player, JSONValue *v);
  60 static void handle_json_rpc_reqid(Player *player, JSONValue *v, int reqid);
  61 static void handle_json_rpc_event(Player *player, JSONValue *v, JSONValue *event);
  62
  63 void PlayerOpenFile(MainWindow *win) {
  64     pthread_t tid;
  65     if(pthread_create(&tid, NULL, start_player, win)) {
  66         perror("pthread_create");
  67     }
  68 }
  69
  70 static int prepare_player(Player *player, char *log_arg, char *ipc_arg) {
  71     // create tmp directory for IPC
  72     char *player_tmp = NULL;
  73     char buf[STR_BUFSIZE];
  74     snprintf(buf, STR_BUFSIZE, "/tmp/uwplayer-%x", rand());
  75     int mkdir_success = 0;
  76     for(int t=0;t<5;t++) {
  77         if(!mkdir(buf, S_IRWXU)) {
  78             mkdir_success = 1;
  79             break;
  80         } else if(errno != EEXIST) {
  81             break;
  82         }
  83     }
  84     if(!mkdir_success) return 1;
  85     player_tmp = strdup(buf);
  86     player->tmp = player_tmp;
  87
  88     // prepare log/ipc args and create log fifo
  89     int err = 0;
  90
  91     if(snprintf(log_arg, STR_BUFSIZE, "--log-file=%s/%s", player_tmp, "log.fifo") >= STR_BUFSIZE) {
  92         err = 1;
  93     }
  94     if(snprintf(ipc_arg, STR_BUFSIZE, "--input-ipc-server=%s/%s", player_tmp, "ipc.socket") >= STR_BUFSIZE) {
  95         err = 1;
  96     }
  97
  98     snprintf(buf, STR_BUFSIZE, "%s/log.fifo", player_tmp);
  99     if(err || mkfifo(buf, S_IRUSR|S_IWUSR)) {
 100         rmdir(player_tmp);
 101         return 1;
 102     }
 103
 104     return 0;
 105 }
 106
 107 static void* wait_for_process(void *data) {
 108     Player *player = data;
 109     int status = 0;
 110     waitpid(player->process, &status, 0);
 111
 112     player->isactive = FALSE;
 113     player->status = status;
 114     SetPlayerWindow(0);
 115
 116     return NULL;
 117 }
 118
 119 static int start_player_process(Player *player, MainWindow *win) {
 120     char log_arg[STR_BUFSIZE];
 121     char ipc_arg[STR_BUFSIZE];
 122
 123     if(prepare_player(player, log_arg, ipc_arg)) {
 124         return 1;
 125     }
 126
 127     char *player_bin = SettingsGetPlayerBin();
 128     if(!player_bin) {
 129         fprintf(stderr, "No mpv binary available\n");
 130         return 1;
 131     }
 132
 133     // -wid parameter value for embedding the player in the player_widget
 134     Window wid = XtWindow(win->player_widget);
 135     char wid_arg[WID_ARG_BUFSIZE];
 136     if(snprintf(wid_arg, WID_ARG_BUFSIZE, "%lu", wid) >= WID_ARG_BUFSIZE) {
 137         return 1;
 138     }
 139
 140     // create player arg list
 141     char *args[32];
 142     int ac = 0;
 143     args[ac++] = player_bin;
 144     args[ac++] = "-wid";
 145     args[ac++] = wid_arg;
 146     args[ac++] = "--no-terminal";
 147     args[ac++] = "--player-operation-mode=pseudo-gui";
 148     args[ac++] = log_arg;
 149     args[ac++] = ipc_arg;
 150     args[ac++] = win->file;
 151     args[ac++] = NULL;
 152
 153     posix_spawn_file_actions_t actions;
 154     posix_spawn_file_actions_init(&actions);
 155
 156     //posix_spawn_file_actions_adddup2(&actions, pin[0], STDIN_FILENO);
 157     //posix_spawn_file_actions_adddup2(&actions, pout[1], STDOUT_FILENO);
 158
 159     // start player
 160     pid_t player_pid;
 161     if(posix_spawn(&player_pid, player_bin, &actions, NULL, args, environ)) {
 162         perror("posix_spawn");
 163         return 1;
 164     }
 165     posix_spawn_file_actions_destroy(&actions);
 166
 167     player->process = player_pid;
 168     player->isactive = TRUE;
 169
 170     pthread_t tid;
 171     if(pthread_create(&tid, NULL, wait_for_process, player)) {
 172         perror("pthread_create");
 173     }
 174
 175     return 0;
 176 }
 177
 178 static int wait_for_ipc(Player *player) {
 179     char buf[STR_BUFSIZE];
 180     snprintf(buf, STR_BUFSIZE, "%s/log.fifo", player->tmp); // cannot fail
 181
 182     // open log
 183     int fd_log = open(buf, O_RDONLY);
 184     if(fd_log < 0) {
 185         perror("Cannot open log");
 186         return 1;
 187     }
 188     player->log = fd_log;
 189
 190     // read log until IPC socket is created
 191     char *scan_str = "Listening to IPC";
 192     int scan_pos = 0;
 193     int scan_len = strlen(scan_str);
 194     int ipc_listen = 0;
 195     ssize_t r;
 196     while((r = read(fd_log, buf, STR_BUFSIZE)) > 0) {
 197         for(int i=0;i<r;i++) {
 198             char c = buf[i];
 199             char *s_str = buf+i;
 200
 201             if(scan_pos == scan_len) {
 202                 ipc_listen = 1;
 203                 break;
 204             }
 205
 206             if(scan_str[scan_pos] == c) {
 207                 scan_pos++;
 208             } else {
 209                 scan_pos = 0;
 210             }
 211         }
 212         if(ipc_listen) break;
 213     }
 214
 215     return 0;
 216 }
 217
 218 static int connect_to_ipc(Player *player) {
 219     // connect to IPC socket
 220     int fd_ipc = socket(AF_UNIX, SOCK_STREAM, 0);
 221     if(fd_ipc < 0) {
 222         perror("Cannot create IPC socket");
 223         return 1;
 224     }
 225     player->ipc = fd_ipc;
 226
 227     char buf[STR_BUFSIZE];
 228     snprintf(buf, STR_BUFSIZE, "%s/%s", player->tmp, "ipc.socket"); // cannot fail
 229
 230     struct sockaddr_un ipc_addr;
 231     memset(&ipc_addr, 0, sizeof(struct sockaddr_un));
 232     ipc_addr.sun_family = AF_UNIX;
 233     memcpy(ipc_addr.sun_path, buf, strlen(buf));
 234     if(connect(fd_ipc, (struct sockaddr *)&ipc_addr, sizeof(ipc_addr)) == -1) {
 235         perror("Cannot connect to IPC socket");
 236         return 1;
 237     }
 238
 239     return 0;
 240 }
 241
 242 static void* start_player(void *data) {
 243     MainWindow *win = data;
 244
 245     Player *player = malloc(sizeof(Player));
 246     memset(player, 0, sizeof(Player));
 247
 248     // start mpv
 249     if(start_player_process(player, win)) {
 250         PlayerDestroy(player);
 251         return NULL;
 252     }
 253
 254     // wait until IPC socket is ready
 255     if(wait_for_ipc(player)) {
 256         PlayerDestroy(player);
 257         return NULL;
 258     }
 259     close(player->log);
 260
 261     if(connect_to_ipc(player)) {
 262         PlayerDestroy(player);
 263         return NULL;
 264     }
 265
 266     // set player in main window
 267     if(win->player) {
 268         PlayerDestroy(win->player);
 269     }
 270     win->player = player;
 271
 272     // IO
 273     player_io(player);
 274
 275     return NULL;
 276 }
 277
 278 static void player_io(Player *p) {
 279     struct pollfd fds[2];
 280     fds[0].fd = p->ipc;
 281     fds[0].events = POLLIN;
 282     fds[0].revents = 0;
 283     JSONParser *js = json_parser_new();
 284
 285     char buf[PLAYER_IN_BUFSIZE];
 286     while(p->isactive && poll(fds, 2, PLAYER_POLL_TIMEOUT)) {
 287         if(fds[0].revents == POLLIN) {
 288             ssize_t r;
 289             if((r = read(fds[0].fd, buf, PLAYER_IN_BUFSIZE)) <= 0) {
 290                 break;
 291             }
 292             //fwrite(buf, 1, r, stdout);
 293             fflush(stdout);
 294             json_parser_fill(js, buf, r);
 295
 296             JSONValue *value;
 297             int ret;
 298             while((ret = json_read_value(js, &value)) == 1) {
 299                 handle_json_rpc_msg(p, value);
 300                 json_value_free(value);
 301             }
 302
 303             if(ret == -1) {
 304                 fprintf(stderr, "JSON-RPC error\n");
 305                 break;
 306             }
 307         }
 308
 309         char *cmd = "{ \"command\": [\"get_property\", \"playback-time\"], request_id=\"" REQ_ID_PLAYBACK_TIME "\" }\n";
 310         //write(p->ipc, cmd, strlen(cmd));
 311     }
 312
 313
 314     printf("PlayerEnd: %s\n", strerror(errno));
 315     fflush(stdout);
 316 }
 317
 318
 319 static void handle_json_rpc_msg(Player *player, JSONValue *v) {
 320     if(v->type != JSON_OBJECT) return;
 321
 322     JSONValue *request_id_v = json_obj_get(&v->value.object, "request_id");
 323     JSONValue *event = NULL;
 324     if(request_id_v && request_id_v->type == JSON_STRING) {
 325         int request_id = 0;
 326         if(request_id_v->value.string.length == 2) {
 327             request_id = 10 * (request_id_v->value.string.string[0] - '0') + (request_id_v->value.string.string[1] - '0');
 328             handle_json_rpc_reqid(player, v, request_id);
 329             return;
 330         }
 331     } else if ((event = json_obj_get(&v->value.object, "event")) != NULL) {
 332         handle_json_rpc_event(player, v, event);
 333     }
 334
 335     //json_print(v, NULL, 0);
 336 }
 337
 338 static Boolean player_widget_set_size(XtPointer data) {
 339     Player *player = data;
 340     MainWindow *win = GetMainWindow();
 341
 342     Dimension win_width, win_height;
 343     XtVaGetValues(win->window, XmNwidth, &win_width, XmNheight, &win_height, NULL);
 344     Dimension player_width, player_height;
 345     XtVaGetValues(win->player_widget, XmNwidth, &player_width, XmNheight, &player_height, NULL);
 346
 347     Dimension new_width = player->width + win_width - player_width;
 348     Dimension new_height = player->height + win_height - player_height;
 349
 350     // set window size
 351     XtVaSetValues(win->window, XmNwidth, new_width, XmNheight, new_height, NULL);
 352
 353     // set window aspect ratio
 354     XSizeHints hints;
 355     hints.flags = PAspect;
 356     hints.min_aspect.x = new_width;
 357     hints.min_aspect.y = new_height;
 358     hints.max_aspect.x = new_width;
 359     hints.max_aspect.y = new_height;
 360     XSetWMNormalHints(XtDisplay(win->window), XtWindow(win->window), &hints);
 361
 362     return 0;
 363 }
 364
 365
 366
 367 static void player_set_size(Player *player, int width, int height) {
 368     if(width >= 0) {
 369         player->width = width;
 370     }
 371     if(height >= 0) {
 372         player->height = height;
 373     }
 374     if(player->width > 0 && player->height > 0) {
 375         AppExecProc(player_widget_set_size, player);
 376     }
 377 }
 378
 379 static void handle_json_rpc_reqid(Player *player, JSONValue *v, int reqid) {
 380     JSONValue *data = json_obj_get(&v->value.object, "data");
 381     if(!data) return;
 382
 383     switch(reqid) {
 384         case REQ_ID_PLAYBACK_TIME_INT: {
 385             if(data->type == JSON_NUMBER) {
 386                 player->playback_time = data->value.number.value;
 387             }
 388             break;
 389         }
 390         case REQ_ID_WIDTH_INT: {
 391             if(data->type == JSON_INTEGER) {
 392                 player_set_size(player, data->value.integer.value, -1);
 393             }
 394             break;
 395         }
 396         case REQ_ID_HEIGHT_INT: {
 397             if(data->type == JSON_INTEGER) {
 398                 player_set_size(player, -1, data->value.integer.value);
 399             }
 400             break;
 401         }
 402     }
 403 }
 404
 405 static Boolean get_player_window(XtPointer data) {
 406     Player *p = data;
 407     MainWindow *win = GetMainWindow();
 408
 409     Widget player_wid = win->player_widget;
 410     Window root, parent;
 411     Window *child;
 412     unsigned int nchild;
 413     XQueryTree(XtDisplay(player_wid), XtWindow(player_wid), &root, &parent, &child, &nchild);
 414     if(nchild > 0) {
 415         p->window = child[0];
 416         XFree(child);
 417
 418         SetPlayerWindow(p->window);
 419         XSelectInput(XtDisplay(win->player_widget), p->window, PointerMotionMask);
 420     }
 421
 422     return 0;
 423 }
 424
 425 #define CURSOR_AUTOHIDE_THRESHOLD_SEC  4
 426
 427 static Boolean hide_cursor(XtPointer data) {
 428     MainWindow *win = data;
 429     WindowHidePlayerCursor(win);
 430     return 0;
 431 }
 432
 433 static void check_hide_cursor(Player *p) {
 434     MainWindow *win = GetMainWindow();
 435     if(win->cursorhidden) return;
 436
 437     if(p->playback_time - win->motion_playback_time > CURSOR_AUTOHIDE_THRESHOLD_SEC) {
 438         AppExecProc(hide_cursor, win);
 439     }
 440 }
 441
 442 static void handle_json_rpc_event(Player *p, JSONValue *v, JSONValue *event) {
 443     if(!json_strcmp(event, "property-change")) {
 444         JSONValue *name = json_obj_get(&v->value.object, "name");
 445         JSONValue *data = json_obj_get(&v->value.object, "data");
 446         if(!json_strcmp(name, "playback-time")) {
 447             if(data && data->type == JSON_NUMBER) {
 448                 p->playback_time = data->value.number.value;
 449                 //printf("playback-time: %f\n", p->playback_time);
 450                 check_hide_cursor(p);
 451             }
 452         } else if(!json_strcmp(name, "eof-reached")) {
 453             if(data && data->type == JSON_LITERAL && data->value.literal.literal == JSON_TRUE) {
 454                 PlayerEOF(p);
 455             }
 456         } else if(!json_strcmp(name, "osd-height")) {
 457             if(data->type == JSON_NUMBER) {
 458                 p->osd_height = data->value.number.value;
 459             }
 460         }
 461     } else if(!p->isstarted && !json_strcmp(event, "playback-restart")) {
 462         char *cmd = "{ \"command\": [\"observe_property\", 1, \"playback-time\"] }\n"
 463                     "{ \"command\": [\"observe_property\", 1, \"eof-reached\"] }\n"
 464                     "{ \"command\": [\"observe_property\", 1, \"osd-height\"] }\n"
 465                     "{ \"command\": [\"get_property\", \"width\"], request_id=\"" REQ_ID_WIDTH "\" }\n"
 466                     "{ \"command\": [\"get_property\", \"height\"], request_id=\"" REQ_ID_HEIGHT "\" }\n"
 467                     "{ \"command\": [\"set_property\", \"keep-open\", true] }\n";
 468         write(p->ipc, cmd, strlen(cmd));
 469         p->isstarted = TRUE;
 470
 471         AppExecProc(get_player_window, p);
 472     }
 473 }
 474
 475 void PlayerDestroy(Player *p) {
 476     if(p->log >= 0) {
 477         close(p->log);
 478     }
 479     if(p->ipc >= 0) {
 480         close(p->ipc);
 481     }
 482
 483     if(p->tmp) {
 484         free(p->tmp);
 485     }
 486
 487     if(p->isactive) {
 488         kill(p->process, SIGTERM);
 489     }
 490
 491     SetPlayerWindow(0);
 492     free(p);
 493 }
 494
 495
 496 static void json_print(JSONValue *value, char *name, int indent) {
 497     if(name) {
 498         printf("%*s%s: ", indent*4, "", name);
 499     } else {
 500         printf("%*s", indent*4, "");
 501     }
 502
 503
 504     switch(value->type) {
 505         case JSON_OBJECT: {
 506             printf("{\n");
 507
 508             for(int i=0;i<value->value.object.size;i++) {
 509                 JSONObjValue val = value->value.object.values[i];
 510                 json_print(val.value, val.name, indent+1);
 511                 if(i+1 < value->value.object.size) {
 512                     printf(",\n");
 513                 } else {
 514                     printf("\n");
 515                 }
 516             }
 517
 518             printf("%*s}", indent*4, "");
 519             break;
 520         }
 521         case JSON_ARRAY: {
 522             printf("[\n");
 523
 524             for(int i=0;i<value->value.object.size;i++) {
 525                 JSONValue *v = value->value.array.array[i];
 526                 json_print(v, NULL, indent+1);
 527                 if(i+1 < value->value.array.size) {
 528                     printf(",\n");
 529                 } else {
 530                     printf("\n");
 531                 }
 532             }
 533
 534             printf("%*s]", indent*4, "");
 535             break;
 536         }
 537         case JSON_STRING: {
 538             printf("\"%s\"", value->value.string.string);
 539             break;
 540         }
 541         case JSON_INTEGER: {
 542             printf("%i", (int)value->value.integer.value);
 543             break;
 544         }
 545         case JSON_NUMBER: {
 546             printf("%f", value->value.number.value);
 547             break;
 548         }
 549         case JSON_LITERAL: {
 550             char *lit = "NULL";
 551             switch(value->value.literal.literal) {
 552                 case JSON_NULL: break;
 553                 case JSON_TRUE: lit = "true"; break;
 554                 case JSON_FALSE: lit = "false"; break;
 555             }
 556             printf("%s\n", lit);
 557             break;
 558         }
 559     }
 560
 561     if(indent == 0) {
 562         putchar('\n');
 563     }
 564 }
 565
 566 static Boolean open_next_file(XtPointer data) {
 567     char *file = data;
 568     MainWindow *win = GetMainWindow();
 569     if(win->file) {
 570         free(file);
 571     }
 572     win->file = file;
 573     PlayerOpenFile(win);
 574     return 0;
 575 }
 576
 577 void PlayerEOF(Player *p) {
 578     MainWindow *win = GetMainWindow();
 579     if(win->repeatTrack) {
 580         char *cmd = "{ \"command\": [\"set_property\", \"playback-time\", 0] }\n";
 581         write(p->ipc, cmd, strlen(cmd));
 582     } else if(win->autoplayFolder) {
 583         char *next_file = util_find_next_file(win->file);
 584         if(next_file) {
 585             AppExecProc(open_next_file, next_file);
 586         }
 587     }
 588 }
 589
 590 void PlayerHandleInput(MainWindow *win, Player *p, XmDrawingAreaCallbackStruct *cb) {
 591
 592 }