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 #include "playlist.h"
  45
  46 extern char **environ;
  47
  48 #define STR_BUFSIZE 512
  49 #define WID_ARG_BUFSIZE 24
  50
  51 #define PLAYER_POLL_TIMEOUT 500
  52 #define PLAYER_IN_BUFSIZE   8192
  53
  54 static void json_print(JSONValue *value, char *name, int indent);
  55
  56 static void* start_player(void *data);
  57
  58 static void player_io(Player *p);
  59
  60 static void handle_json_rpc_msg(Player *player, JSONValue *v);
  61 static void handle_json_rpc_reqid(Player *player, JSONValue *v, int reqid);
  62 static void handle_json_rpc_event(Player *player, JSONValue *v, JSONValue *event);
  63
  64 void PlayerOpenFile(MainWindow *win) {
  65     pthread_t tid;
  66     if(pthread_create(&tid, NULL, start_player, win)) {
  67         perror("pthread_create");
  68     }
  69 }
  70
  71 static int prepare_player(Player *player, char *log_arg, char *ipc_arg) {
  72     // create tmp directory for IPC
  73     char *player_tmp = NULL;
  74     char buf[STR_BUFSIZE];
  75     snprintf(buf, STR_BUFSIZE, "/tmp/uwplayer-%x", rand());
  76     int mkdir_success = 0;
  77     for(int t=0;t<5;t++) {
  78         if(!mkdir(buf, S_IRWXU)) {
  79             mkdir_success = 1;
  80             break;
  81         } else if(errno != EEXIST) {
  82             break;
  83         }
  84     }
  85     if(!mkdir_success) return 1;
  86     player_tmp = strdup(buf);
  87     player->tmp = player_tmp;
  88
  89     // prepare log/ipc args and create log fifo
  90     int err = 0;
  91
  92     if(snprintf(log_arg, STR_BUFSIZE, "--log-file=%s/%s", player_tmp, "log.fifo") >= STR_BUFSIZE) {
  93         err = 1;
  94     }
  95     if(snprintf(ipc_arg, STR_BUFSIZE, "--input-ipc-server=%s/%s", player_tmp, "ipc.socket") >= STR_BUFSIZE) {
  96         err = 1;
  97     }
  98
  99     snprintf(buf, STR_BUFSIZE, "%s/log.fifo", player_tmp);
 100     if(err || mkfifo(buf, S_IRUSR|S_IWUSR)) {
 101         rmdir(player_tmp);
 102         return 1;
 103     }
 104
 105     return 0;
 106 }
 107
 108 static void* wait_for_process(void *data) {
 109     Player *player = data;
 110     int status = 0;
 111     waitpid(player->process, &status, 0);
 112
 113     printf("waitpid: %d\n", status);
 114
 115     player->isactive = FALSE;
 116     player->status = status;
 117     SetPlayerWindow(0);
 118
 119     return NULL;
 120 }
 121
 122 static int start_player_process(Player *player, MainWindow *win) {
 123     char log_arg[STR_BUFSIZE];
 124     char ipc_arg[STR_BUFSIZE];
 125
 126     if(prepare_player(player, log_arg, ipc_arg)) {
 127         return 1;
 128     }
 129
 130     char *player_bin = SettingsGetPlayerBin();
 131     if(!player_bin) {
 132         fprintf(stderr, "No mpv binary available\n");
 133         return 1;
 134     }
 135
 136     // -wid parameter value for embedding the player in the player_widget
 137     Window wid = XtWindow(win->player_widget);
 138     char wid_arg[WID_ARG_BUFSIZE];
 139     if(snprintf(wid_arg, WID_ARG_BUFSIZE, "%lu", wid) >= WID_ARG_BUFSIZE) {
 140         return 1;
 141     }
 142
 143     // create player arg list
 144     char *args[32];
 145     int ac = 0;
 146     args[ac++] = player_bin;
 147     args[ac++] = "-wid";
 148     args[ac++] = wid_arg;
 149     //args[ac++] = "--no-terminal";
 150     args[ac++] = "--player-operation-mode=pseudo-gui";
 151     args[ac++] = log_arg;
 152     args[ac++] = ipc_arg;
 153     args[ac++] = win->file;
 154     args[ac++] = NULL;
 155
 156     posix_spawn_file_actions_t actions;
 157     posix_spawn_file_actions_init(&actions);
 158
 159     //posix_spawn_file_actions_adddup2(&actions, pin[0], STDIN_FILENO);
 160     //posix_spawn_file_actions_adddup2(&actions, pout[1], STDOUT_FILENO);
 161
 162     // start player
 163     pid_t player_pid;
 164     if(posix_spawn(&player_pid, player_bin, &actions, NULL, args, environ)) {
 165         perror("posix_spawn");
 166         return 1;
 167     }
 168     posix_spawn_file_actions_destroy(&actions);
 169
 170     player->process = player_pid;
 171     player->isactive = TRUE;
 172
 173     pthread_t tid;
 174     if(pthread_create(&tid, NULL, wait_for_process, player)) {
 175         perror("pthread_create");
 176     }
 177
 178     return 0;
 179 }
 180
 181 static int wait_for_ipc(Player *player) {
 182     char buf[STR_BUFSIZE];
 183     snprintf(buf, STR_BUFSIZE, "%s/log.fifo", player->tmp); // cannot fail
 184
 185     // open log
 186     int fd_log = open(buf, O_RDONLY);
 187     if(fd_log < 0) {
 188         perror("Cannot open log");
 189         return 1;
 190     }
 191     player->log = fd_log;
 192
 193     // read log until IPC socket is created
 194     char *scan_str = "Listening to IPC";
 195     int scan_pos = 0;
 196     int scan_len = strlen(scan_str);
 197     int ipc_listen = 0;
 198     ssize_t r;
 199     while((r = read(fd_log, buf, STR_BUFSIZE)) > 0) {
 200         for(int i=0;i<r;i++) {
 201             char c = buf[i];
 202             char *s_str = buf+i;
 203
 204             if(scan_pos == scan_len) {
 205                 ipc_listen = 1;
 206                 break;
 207             }
 208
 209             if(scan_str[scan_pos] == c) {
 210                 scan_pos++;
 211             } else {
 212                 scan_pos = 0;
 213             }
 214         }
 215         if(ipc_listen) break;
 216     }
 217
 218     return 0;
 219 }
 220
 221 static int connect_to_ipc(Player *player) {
 222     // connect to IPC socket
 223     int fd_ipc = socket(AF_UNIX, SOCK_STREAM, 0);
 224     if(fd_ipc < 0) {
 225         perror("Cannot create IPC socket");
 226         return 1;
 227     }
 228     player->ipc = fd_ipc;
 229
 230     char buf[STR_BUFSIZE];
 231     snprintf(buf, STR_BUFSIZE, "%s/%s", player->tmp, "ipc.socket"); // cannot fail
 232
 233     struct sockaddr_un ipc_addr;
 234     memset(&ipc_addr, 0, sizeof(struct sockaddr_un));
 235     ipc_addr.sun_family = AF_UNIX;
 236     memcpy(ipc_addr.sun_path, buf, strlen(buf));
 237     if(connect(fd_ipc, (struct sockaddr *)&ipc_addr, sizeof(ipc_addr)) == -1) {
 238         perror("Cannot connect to IPC socket");
 239         return 1;
 240     }
 241
 242     return 0;
 243 }
 244
 245 static Boolean update_player_window(XtPointer data) {
 246     MainWindow *win = data;
 247     WindowUpdate(win);
 248 }
 249
 250 static void* start_player(void *data) {
 251     MainWindow *win = data;
 252
 253     Player *player = malloc(sizeof(Player));
 254     memset(player, 0, sizeof(Player));
 255
 256     // start mpv
 257     if(start_player_process(player, win)) {
 258         PlayerDestroy(player);
 259         return NULL;
 260     }
 261
 262     // wait until IPC socket is ready
 263     if(wait_for_ipc(player)) {
 264         PlayerDestroy(player);
 265         return NULL;
 266     }
 267     //close(player->log);
 268
 269     if(connect_to_ipc(player)) {
 270         PlayerDestroy(player);
 271         return NULL;
 272     }
 273
 274     // set player in main window
 275     if(win->player) {
 276         PlayerDestroy(win->player);
 277     }
 278     win->player = player;
 279
 280     // update main window
 281     AppExecProc(update_player_window, win);
 282
 283     // IO
 284     player_io(player);
 285
 286     return NULL;
 287 }
 288
 289 static void player_io(Player *p) {
 290     struct pollfd fds[2];
 291     fds[0].fd = p->ipc;
 292     fds[0].events = POLLIN;
 293     fds[0].revents = 0;
 294     fds[1].fd = p->log;
 295     fds[1].events = POLLIN;
 296     fds[1].revents = 0;
 297     JSONParser *js = json_parser_new();
 298
 299     char buf[PLAYER_IN_BUFSIZE];
 300     while(p->isactive && (poll(fds, 2, PLAYER_POLL_TIMEOUT) >= 0)) {
 301         if(fds[0].revents == POLLIN) {
 302             ssize_t r;
 303             if((r = read(fds[0].fd, buf, PLAYER_IN_BUFSIZE)) <= 0) {
 304                 break;
 305             }
 306             //fwrite(buf, 1, r, stdout);
 307             fflush(stdout);
 308             json_parser_fill(js, buf, r);
 309
 310             JSONValue *value;
 311             int ret;
 312             while((ret = json_read_value(js, &value)) == 1) {
 313                 handle_json_rpc_msg(p, value);
 314                 json_value_free(value);
 315             }
 316
 317             if(ret == -1) {
 318                 fprintf(stderr, "JSON-RPC error\n");
 319                 break;
 320             }
 321         }
 322         if(fds[1].revents == POLLIN) {
 323             // just read to clean the log pipe
 324             read(fds[1].fd, buf, PLAYER_IN_BUFSIZE);
 325         }
 326
 327         //char *cmd = "{ \"command\": [\"get_property\", \"playback-time\"], request_id=\"" REQ_ID_PLAYBACK_TIME "\" }\n";
 328         //write(p->ipc, cmd, strlen(cmd));
 329     }
 330
 331
 332     printf("PlayerEnd: %s\n", strerror(errno));
 333     fflush(stdout);
 334 }
 335
 336
 337 static void handle_json_rpc_msg(Player *player, JSONValue *v) {
 338     if(v->type != JSON_OBJECT) return;
 339
 340     JSONValue *request_id_v = json_obj_get(&v->value.object, "request_id");
 341     JSONValue *event = NULL;
 342     if(request_id_v && request_id_v->type == JSON_STRING) {
 343         int request_id = 0;
 344         if(request_id_v->value.string.length == 2) {
 345             request_id = 10 * (request_id_v->value.string.string[0] - '0') + (request_id_v->value.string.string[1] - '0');
 346             handle_json_rpc_reqid(player, v, request_id);
 347             return;
 348         }
 349     } else if ((event = json_obj_get(&v->value.object, "event")) != NULL) {
 350         handle_json_rpc_event(player, v, event);
 351     }
 352
 353     //json_print(v, NULL, 0);
 354 }
 355
 356 static Boolean player_widget_set_size(XtPointer data) {
 357     Player *player = data;
 358     MainWindow *win = GetMainWindow();
 359
 360     Dimension win_width, win_height;
 361     XtVaGetValues(win->window, XmNwidth, &win_width, XmNheight, &win_height, NULL);
 362     Dimension player_width, player_height;
 363     XtVaGetValues(win->player_widget, XmNwidth, &player_width, XmNheight, &player_height, NULL);
 364
 365     Dimension new_width = player->width + win_width - player_width;
 366     Dimension new_height = player->height + win_height - player_height;
 367
 368     // set window size
 369     XtVaSetValues(win->window, XmNwidth, new_width, XmNheight, new_height, NULL);
 370
 371     // set window aspect ratio
 372     XSizeHints hints;
 373     hints.flags = PAspect;
 374     hints.min_aspect.x = new_width;
 375     hints.min_aspect.y = new_height;
 376     hints.max_aspect.x = new_width;
 377     hints.max_aspect.y = new_height;
 378     XSetWMNormalHints(XtDisplay(win->window), XtWindow(win->window), &hints);
 379
 380     return 0;
 381 }
 382
 383
 384
 385 static void player_set_size(Player *player, int width, int height) {
 386     if(width >= 0) {
 387         player->width = width;
 388     }
 389     if(height >= 0) {
 390         player->height = height;
 391     }
 392     if(player->width > 0 && player->height > 0) {
 393         AppExecProc(player_widget_set_size, player);
 394     }
 395 }
 396
 397 static void handle_json_rpc_reqid(Player *player, JSONValue *v, int reqid) {
 398     JSONValue *data = json_obj_get(&v->value.object, "data");
 399     if(!data) return;
 400
 401     switch(reqid) {
 402         case REQ_ID_PLAYBACK_TIME_INT: {
 403             if(data->type == JSON_NUMBER) {
 404                 player->playback_time = data->value.number.value;
 405             }
 406             break;
 407         }
 408         case REQ_ID_WIDTH_INT: {
 409             if(data->type == JSON_INTEGER) {
 410                 player_set_size(player, data->value.integer.value, -1);
 411             }
 412             break;
 413         }
 414         case REQ_ID_HEIGHT_INT: {
 415             if(data->type == JSON_INTEGER) {
 416                 player_set_size(player, -1, data->value.integer.value);
 417             }
 418             break;
 419         }
 420     }
 421 }
 422
 423 static Boolean get_player_window(XtPointer data) {
 424     Player *p = data;
 425     MainWindow *win = GetMainWindow();
 426
 427     Widget player_wid = win->player_widget;
 428     Window root, parent;
 429     Window *child;
 430     unsigned int nchild;
 431     XQueryTree(XtDisplay(player_wid), XtWindow(player_wid), &root, &parent, &child, &nchild);
 432     if(nchild > 0) {
 433         p->window = child[0];
 434         XFree(child);
 435
 436         SetPlayerWindow(p->window);
 437         XSelectInput(XtDisplay(win->player_widget), p->window, PointerMotionMask);
 438     }
 439
 440     return 0;
 441 }
 442
 443 #define CURSOR_AUTOHIDE_THRESHOLD_SEC  4
 444
 445 static Boolean hide_cursor(XtPointer data) {
 446     MainWindow *win = data;
 447     WindowHidePlayerCursor(win);
 448     return 0;
 449 }
 450
 451 static void check_hide_cursor(Player *p) {
 452     MainWindow *win = GetMainWindow();
 453     if(win->cursorhidden) return;
 454
 455     if(p->playback_time - win->motion_playback_time > CURSOR_AUTOHIDE_THRESHOLD_SEC) {
 456         AppExecProc(hide_cursor, win);
 457     }
 458 }
 459
 460 static void handle_json_rpc_event(Player *p, JSONValue *v, JSONValue *event) {
 461     if(!json_strcmp(event, "property-change")) {
 462         JSONValue *name = json_obj_get(&v->value.object, "name");
 463         JSONValue *data = json_obj_get(&v->value.object, "data");
 464         if(!json_strcmp(name, "playback-time")) {
 465             if(data && data->type == JSON_NUMBER) {
 466                 p->playback_time = data->value.number.value;
 467                 //printf("playback-time: %f\n", p->playback_time);
 468                 check_hide_cursor(p);
 469             }
 470         } else if(!json_strcmp(name, "eof-reached")) {
 471             if(data && data->type == JSON_LITERAL && data->value.literal.literal == JSON_TRUE) {
 472                 PlayerEOF(p);
 473             }
 474         } else if(!json_strcmp(name, "osd-height")) {
 475             if(data->type == JSON_NUMBER) {
 476                 p->osd_height = data->value.number.value;
 477             }
 478         }
 479     } else if(!p->isstarted && !json_strcmp(event, "playback-restart")) {
 480         char *cmd = "{ \"command\": [\"observe_property\", 1, \"playback-time\"] }\n"
 481                     "{ \"command\": [\"observe_property\", 1, \"eof-reached\"] }\n"
 482                     "{ \"command\": [\"observe_property\", 1, \"osd-height\"] }\n"
 483                     "{ \"command\": [\"get_property\", \"width\"], request_id=\"" REQ_ID_WIDTH "\" }\n"
 484                     "{ \"command\": [\"get_property\", \"height\"], request_id=\"" REQ_ID_HEIGHT "\" }\n"
 485                     "{ \"command\": [\"set_property\", \"keep-open\", true] }\n";
 486         write(p->ipc, cmd, strlen(cmd));
 487         p->isstarted = TRUE;
 488
 489         AppExecProc(get_player_window, p);
 490     }
 491 }
 492
 493 void PlayerDestroy(Player *p) {
 494     if(p->log >= 0) {
 495         close(p->log);
 496     }
 497     if(p->ipc >= 0) {
 498         close(p->ipc);
 499     }
 500
 501     if(p->tmp) {
 502         free(p->tmp);
 503     }
 504
 505     if(p->isactive) {
 506         kill(p->process, SIGTERM);
 507     }
 508
 509     SetPlayerWindow(0);
 510     free(p);
 511 }
 512
 513
 514 static void json_print(JSONValue *value, char *name, int indent) {
 515     if(name) {
 516         printf("%*s%s: ", indent*4, "", name);
 517     } else {
 518         printf("%*s", indent*4, "");
 519     }
 520
 521
 522     switch(value->type) {
 523         case JSON_OBJECT: {
 524             printf("{\n");
 525
 526             for(int i=0;i<value->value.object.size;i++) {
 527                 JSONObjValue val = value->value.object.values[i];
 528                 json_print(val.value, val.name, indent+1);
 529                 if(i+1 < value->value.object.size) {
 530                     printf(",\n");
 531                 } else {
 532                     printf("\n");
 533                 }
 534             }
 535
 536             printf("%*s}", indent*4, "");
 537             break;
 538         }
 539         case JSON_ARRAY: {
 540             printf("[\n");
 541
 542             for(int i=0;i<value->value.object.size;i++) {
 543                 JSONValue *v = value->value.array.array[i];
 544                 json_print(v, NULL, indent+1);
 545                 if(i+1 < value->value.array.size) {
 546                     printf(",\n");
 547                 } else {
 548                     printf("\n");
 549                 }
 550             }
 551
 552             printf("%*s]", indent*4, "");
 553             break;
 554         }
 555         case JSON_STRING: {
 556             printf("\"%s\"", value->value.string.string);
 557             break;
 558         }
 559         case JSON_INTEGER: {
 560             printf("%i", (int)value->value.integer.value);
 561             break;
 562         }
 563         case JSON_NUMBER: {
 564             printf("%f", value->value.number.value);
 565             break;
 566         }
 567         case JSON_LITERAL: {
 568             char *lit = "NULL";
 569             switch(value->value.literal.literal) {
 570                 case JSON_NULL: break;
 571                 case JSON_TRUE: lit = "true"; break;
 572                 case JSON_FALSE: lit = "false"; break;
 573             }
 574             printf("%s\n", lit);
 575             break;
 576         }
 577     }
 578
 579     if(indent == 0) {
 580         putchar('\n');
 581     }
 582 }
 583
 584 static Boolean play_next(XtPointer data) {
 585     MainWindow *win = GetMainWindow();
 586     PlayListPlayNext(win, false);
 587     return 0;
 588 }
 589
 590 void PlayerEOF(Player *p) {
 591     MainWindow *win = GetMainWindow();
 592     if(win->playlist.repeatTrack) {
 593         char *cmd = "{ \"command\": [\"set_property\", \"playback-time\", 0] }\n";
 594         write(p->ipc, cmd, strlen(cmd));
 595     } else {
 596         AppExecProc(play_next, NULL);
 597     }
 598 }
 599
 600 void PlayerHandleInput(MainWindow *win, Player *p, XmDrawingAreaCallbackStruct *cb) {
 601
 602 }