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     args[0] = player_bin;
 143     args[1] = "-wid";
 144     args[2] = wid_arg;
 145     args[3] = "--no-terminal";
 146     args[4] = log_arg;
 147     args[5] = ipc_arg;
 148     args[6] = win->file;
 149     args[7] = NULL;
 150
 151     posix_spawn_file_actions_t actions;
 152     posix_spawn_file_actions_init(&actions);
 153
 154     //posix_spawn_file_actions_adddup2(&actions, pin[0], STDIN_FILENO);
 155     //posix_spawn_file_actions_adddup2(&actions, pout[1], STDOUT_FILENO);
 156
 157     // start player
 158     pid_t player_pid;
 159     if(posix_spawn(&player_pid, player_bin, &actions, NULL, args, environ)) {
 160         perror("posix_spawn");
 161         return 1;
 162     }
 163     posix_spawn_file_actions_destroy(&actions);
 164
 165     player->process = player_pid;
 166     player->isactive = TRUE;
 167
 168     pthread_t tid;
 169     if(pthread_create(&tid, NULL, wait_for_process, player)) {
 170         perror("pthread_create");
 171     }
 172
 173     return 0;
 174 }
 175
 176 static int wait_for_ipc(Player *player) {
 177     char buf[STR_BUFSIZE];
 178     snprintf(buf, STR_BUFSIZE, "%s/log.fifo", player->tmp); // cannot fail
 179
 180     // open log
 181     int fd_log = open(buf, O_RDONLY);
 182     if(fd_log < 0) {
 183         perror("Cannot open log");
 184         return 1;
 185     }
 186     player->log = fd_log;
 187
 188     // read log until IPC socket is created
 189     char *scan_str = "Listening to IPC";
 190     int scan_pos = 0;
 191     int scan_len = strlen(scan_str);
 192     int ipc_listen = 0;
 193     ssize_t r;
 194     while((r = read(fd_log, buf, STR_BUFSIZE)) > 0) {
 195         for(int i=0;i<r;i++) {
 196             char c = buf[i];
 197             char *s_str = buf+i;
 198
 199             if(scan_pos == scan_len) {
 200                 ipc_listen = 1;
 201                 break;
 202             }
 203
 204             if(scan_str[scan_pos] == c) {
 205                 scan_pos++;
 206             } else {
 207                 scan_pos = 0;
 208             }
 209         }
 210         if(ipc_listen) break;
 211     }
 212
 213     return 0;
 214 }
 215
 216 static int connect_to_ipc(Player *player) {
 217     // connect to IPC socket
 218     int fd_ipc = socket(AF_UNIX, SOCK_STREAM, 0);
 219     if(fd_ipc < 0) {
 220         perror("Cannot create IPC socket");
 221         return 1;
 222     }
 223     player->ipc = fd_ipc;
 224
 225     char buf[STR_BUFSIZE];
 226     snprintf(buf, STR_BUFSIZE, "%s/%s", player->tmp, "ipc.socket"); // cannot fail
 227
 228     struct sockaddr_un ipc_addr;
 229     memset(&ipc_addr, 0, sizeof(struct sockaddr_un));
 230     ipc_addr.sun_family = AF_UNIX;
 231     memcpy(ipc_addr.sun_path, buf, strlen(buf));
 232     if(connect(fd_ipc, (struct sockaddr *)&ipc_addr, sizeof(ipc_addr)) == -1) {
 233         perror("Cannot connect to IPC socket");
 234         return 1;
 235     }
 236
 237     return 0;
 238 }
 239
 240 static void* start_player(void *data) {
 241     MainWindow *win = data;
 242
 243     Player *player = malloc(sizeof(Player));
 244     memset(player, 0, sizeof(Player));
 245
 246     // start mpv
 247     if(start_player_process(player, win)) {
 248         PlayerDestroy(player);
 249         return NULL;
 250     }
 251
 252     // wait until IPC socket is ready
 253     if(wait_for_ipc(player)) {
 254         PlayerDestroy(player);
 255         return NULL;
 256     }
 257     close(player->log);
 258
 259     if(connect_to_ipc(player)) {
 260         PlayerDestroy(player);
 261         return NULL;
 262     }
 263
 264     // set player in main window
 265     if(win->player) {
 266         PlayerDestroy(win->player);
 267     }
 268     win->player = player;
 269
 270     // IO
 271     player_io(player);
 272
 273     return NULL;
 274 }
 275
 276 static void player_io(Player *p) {
 277     struct pollfd fds[2];
 278     fds[0].fd = p->ipc;
 279     fds[0].events = POLLIN;
 280     fds[0].revents = 0;
 281     JSONParser *js = json_parser_new();
 282
 283     char buf[PLAYER_IN_BUFSIZE];
 284     while(p->isactive && poll(fds, 2, PLAYER_POLL_TIMEOUT)) {
 285         if(fds[0].revents == POLLIN) {
 286             ssize_t r;
 287             if((r = read(fds[0].fd, buf, PLAYER_IN_BUFSIZE)) <= 0) {
 288                 break;
 289             }
 290             //fwrite(buf, 1, r, stdout);
 291             fflush(stdout);
 292             json_parser_fill(js, buf, r);
 293
 294             JSONValue *value;
 295             int ret;
 296             while((ret = json_read_value(js, &value)) == 1) {
 297                 handle_json_rpc_msg(p, value);
 298                 json_value_free(value);
 299             }
 300
 301             if(ret == -1) {
 302                 fprintf(stderr, "JSON-RPC error\n");
 303                 break;
 304             }
 305         }
 306
 307         char *cmd = "{ \"command\": [\"get_property\", \"playback-time\"], request_id=\"" REQ_ID_PLAYBACK_TIME "\" }\n";
 308         //write(p->ipc, cmd, strlen(cmd));
 309     }
 310
 311
 312     printf("PlayerEnd: %s\n", strerror(errno));
 313     fflush(stdout);
 314 }
 315
 316
 317 static void handle_json_rpc_msg(Player *player, JSONValue *v) {
 318     if(v->type != JSON_OBJECT) return;
 319
 320     JSONValue *request_id_v = json_obj_get(&v->value.object, "request_id");
 321     JSONValue *event = NULL;
 322     if(request_id_v && request_id_v->type == JSON_STRING) {
 323         int request_id = 0;
 324         if(request_id_v->value.string.length == 2) {
 325             request_id = 10 * (request_id_v->value.string.string[0] - '0') + (request_id_v->value.string.string[1] - '0');
 326             handle_json_rpc_reqid(player, v, request_id);
 327             return;
 328         }
 329     } else if ((event = json_obj_get(&v->value.object, "event")) != NULL) {
 330         handle_json_rpc_event(player, v, event);
 331     }
 332
 333     //json_print(v, NULL, 0);
 334 }
 335
 336 static Boolean player_widget_set_size(XtPointer data) {
 337     Player *player = data;
 338     MainWindow *win = GetMainWindow();
 339
 340     Dimension win_width, win_height;
 341     XtVaGetValues(win->window, XmNwidth, &win_width, XmNheight, &win_height, NULL);
 342     Dimension player_width, player_height;
 343     XtVaGetValues(win->player_widget, XmNwidth, &player_width, XmNheight, &player_height, NULL);
 344
 345     Dimension new_width = player->width + win_width - player_width;
 346     Dimension new_height = player->height + win_height - player_height;
 347
 348     // set window size
 349     XtVaSetValues(win->window, XmNwidth, new_width, XmNheight, new_height, NULL);
 350
 351     // set window aspect ratio
 352     XSizeHints hints;
 353     hints.flags = PAspect;
 354     hints.min_aspect.x = new_width;
 355     hints.min_aspect.y = new_height;
 356     hints.max_aspect.x = new_width;
 357     hints.max_aspect.y = new_height;
 358     XSetWMNormalHints(XtDisplay(win->window), XtWindow(win->window), &hints);
 359
 360     return 0;
 361 }
 362
 363
 364
 365 static void player_set_size(Player *player, int width, int height) {
 366     if(width >= 0) {
 367         player->width = width;
 368     }
 369     if(height >= 0) {
 370         player->height = height;
 371     }
 372     if(player->width > 0 && player->height > 0) {
 373         AppExecProc(player_widget_set_size, player);
 374     }
 375 }
 376
 377 static void handle_json_rpc_reqid(Player *player, JSONValue *v, int reqid) {
 378     JSONValue *data = json_obj_get(&v->value.object, "data");
 379     if(!data) return;
 380
 381     switch(reqid) {
 382         case REQ_ID_PLAYBACK_TIME_INT: {
 383             if(data->type == JSON_NUMBER) {
 384                 player->playback_time = data->value.number.value;
 385             }
 386             break;
 387         }
 388         case REQ_ID_WIDTH_INT: {
 389             if(data->type == JSON_INTEGER) {
 390                 player_set_size(player, data->value.integer.value, -1);
 391             }
 392             break;
 393         }
 394         case REQ_ID_HEIGHT_INT: {
 395             if(data->type == JSON_INTEGER) {
 396                 player_set_size(player, -1, data->value.integer.value);
 397             }
 398             break;
 399         }
 400     }
 401 }
 402
 403 static Boolean get_player_window(XtPointer data) {
 404     Player *p = data;
 405     MainWindow *win = GetMainWindow();
 406
 407     Widget player_wid = win->player_widget;
 408     Window root, parent;
 409     Window *child;
 410     unsigned int nchild;
 411     XQueryTree(XtDisplay(player_wid), XtWindow(player_wid), &root, &parent, &child, &nchild);
 412     if(nchild > 0) {
 413         p->window = child[0];
 414         XFree(child);
 415
 416         SetPlayerWindow(p->window);
 417         XSelectInput(XtDisplay(win->player_widget), p->window, PointerMotionMask);
 418     }
 419
 420     return 0;
 421 }
 422
 423 #define CURSOR_AUTOHIDE_THRESHOLD_SEC  4
 424
 425 static Boolean hide_cursor(XtPointer data) {
 426     MainWindow *win = data;
 427     WindowHidePlayerCursor(win);
 428     return 0;
 429 }
 430
 431 static void check_hide_cursor(Player *p) {
 432     MainWindow *win = GetMainWindow();
 433     if(win->cursorhidden) return;
 434
 435     if(p->playback_time - win->motion_playback_time > CURSOR_AUTOHIDE_THRESHOLD_SEC) {
 436         AppExecProc(hide_cursor, win);
 437     }
 438 }
 439
 440 static void handle_json_rpc_event(Player *p, JSONValue *v, JSONValue *event) {
 441     if(!json_strcmp(event, "property-change")) {
 442         JSONValue *name = json_obj_get(&v->value.object, "name");
 443         JSONValue *data = json_obj_get(&v->value.object, "data");
 444         if(!json_strcmp(name, "playback-time")) {
 445             if(data && data->type == JSON_NUMBER) {
 446                 p->playback_time = data->value.number.value;
 447                 //printf("playback-time: %f\n", p->playback_time);
 448                 check_hide_cursor(p);
 449             }
 450         } else if(!json_strcmp(name, "eof-reached")) {
 451             if(data && data->type == JSON_LITERAL && data->value.literal.literal == JSON_TRUE) {
 452                 PlayerEOF(p);
 453             }
 454         } else if(!json_strcmp(name, "osd-height")) {
 455             if(data->type == JSON_NUMBER) {
 456                 p->osd_height = data->value.number.value;
 457             }
 458         }
 459     } else if(!p->isstarted && !json_strcmp(event, "playback-restart")) {
 460         char *cmd = "{ \"command\": [\"observe_property\", 1, \"playback-time\"] }\n"
 461                     "{ \"command\": [\"observe_property\", 1, \"eof-reached\"] }\n"
 462                     "{ \"command\": [\"observe_property\", 1, \"osd-height\"] }\n"
 463                     "{ \"command\": [\"get_property\", \"width\"], request_id=\"" REQ_ID_WIDTH "\" }\n"
 464                     "{ \"command\": [\"get_property\", \"height\"], request_id=\"" REQ_ID_HEIGHT "\" }\n"
 465                     "{ \"command\": [\"set_property\", \"keep-open\", true] }\n";
 466         write(p->ipc, cmd, strlen(cmd));
 467         p->isstarted = TRUE;
 468
 469         AppExecProc(get_player_window, p);
 470     }
 471 }
 472
 473 void PlayerDestroy(Player *p) {
 474     if(p->log >= 0) {
 475         close(p->log);
 476     }
 477     if(p->ipc >= 0) {
 478         close(p->ipc);
 479     }
 480
 481     if(p->tmp) {
 482         free(p->tmp);
 483     }
 484
 485     if(p->isactive) {
 486         kill(p->process, SIGTERM);
 487     }
 488
 489     SetPlayerWindow(0);
 490     free(p);
 491 }
 492
 493
 494 static void json_print(JSONValue *value, char *name, int indent) {
 495     if(name) {
 496         printf("%*s%s: ", indent*4, "", name);
 497     } else {
 498         printf("%*s", indent*4, "");
 499     }
 500
 501
 502     switch(value->type) {
 503         case JSON_OBJECT: {
 504             printf("{\n");
 505
 506             for(int i=0;i<value->value.object.size;i++) {
 507                 JSONObjValue val = value->value.object.values[i];
 508                 json_print(val.value, val.name, indent+1);
 509                 if(i+1 < value->value.object.size) {
 510                     printf(",\n");
 511                 } else {
 512                     printf("\n");
 513                 }
 514             }
 515
 516             printf("%*s}", indent*4, "");
 517             break;
 518         }
 519         case JSON_ARRAY: {
 520             printf("[\n");
 521
 522             for(int i=0;i<value->value.object.size;i++) {
 523                 JSONValue *v = value->value.array.array[i];
 524                 json_print(v, NULL, indent+1);
 525                 if(i+1 < value->value.array.size) {
 526                     printf(",\n");
 527                 } else {
 528                     printf("\n");
 529                 }
 530             }
 531
 532             printf("%*s]", indent*4, "");
 533             break;
 534         }
 535         case JSON_STRING: {
 536             printf("\"%s\"", value->value.string.string);
 537             break;
 538         }
 539         case JSON_INTEGER: {
 540             printf("%i", (int)value->value.integer.value);
 541             break;
 542         }
 543         case JSON_NUMBER: {
 544             printf("%f", value->value.number.value);
 545             break;
 546         }
 547         case JSON_LITERAL: {
 548             char *lit = "NULL";
 549             switch(value->value.literal.literal) {
 550                 case JSON_NULL: break;
 551                 case JSON_TRUE: lit = "true"; break;
 552                 case JSON_FALSE: lit = "false"; break;
 553             }
 554             printf("%s\n", lit);
 555             break;
 556         }
 557     }
 558
 559     if(indent == 0) {
 560         putchar('\n');
 561     }
 562 }
 563
 564 static Boolean open_next_file(XtPointer data) {
 565     char *file = data;
 566     MainWindow *win = GetMainWindow();
 567     if(win->file) {
 568         free(file);
 569     }
 570     win->file = file;
 571     PlayerOpenFile(win);
 572     return 0;
 573 }
 574
 575 void PlayerEOF(Player *p) {
 576     MainWindow *win = GetMainWindow();
 577     if(win->repeatTrack) {
 578         char *cmd = "{ \"command\": [\"set_property\", \"playback-time\", 0] }\n";
 579         write(p->ipc, cmd, strlen(cmd));
 580     } else if(win->autoplayFolder) {
 581         char *next_file = util_find_next_file(win->file);
 582         if(next_file) {
 583             AppExecProc(open_next_file, next_file);
 584         }
 585     }
 586 }
 587
 588 void PlayerHandleInput(MainWindow *win, Player *p, XmDrawingAreaCallbackStruct *cb) {
 589
 590 }