2 * Copyright 2022 Olaf Wintermann
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
29 #include <sys/fcntl.h>
37 #include <sys/socket.h>
44 extern char **environ;
46 #define STR_BUFSIZE 512
47 #define WID_ARG_BUFSIZE 24
49 #define PLAYER_POLL_TIMEOUT 500
50 #define PLAYER_IN_BUFSIZE 8192
52 static void json_print(JSONValue *value, char *name, int indent);
54 static void* start_player(void *data);
56 static void player_io(Player *p);
58 static void handle_json_rpc_msg(Player *player, JSONValue *v);
59 static void handle_json_rpc_reqid(Player *player, JSONValue *v, int reqid);
60 static void handle_json_rpc_event(Player *player, JSONValue *v, JSONValue *event);
62 void PlayerOpenFile(MainWindow *win) {
64 if(pthread_create(&tid, NULL, start_player, win)) {
65 perror("pthread_create");
69 static int prepare_player(Player *player, char *log_arg, char *ipc_arg) {
70 // create tmp directory for IPC
71 char *player_tmp = NULL;
72 char buf[STR_BUFSIZE];
73 snprintf(buf, STR_BUFSIZE, "/tmp/uwplayer-%x", rand());
74 int mkdir_success = 0;
75 for(int t=0;t<5;t++) {
76 if(!mkdir(buf, S_IRWXU)) {
79 } else if(errno != EEXIST) {
83 if(!mkdir_success) return 1;
84 player_tmp = strdup(buf);
85 player->tmp = player_tmp;
87 // prepare log/ipc args and create log fifo
90 if(snprintf(log_arg, STR_BUFSIZE, "--log-file=%s/%s", player_tmp, "log.fifo") >= STR_BUFSIZE) {
93 if(snprintf(ipc_arg, STR_BUFSIZE, "--input-ipc-server=%s/%s", player_tmp, "ipc.socket") >= STR_BUFSIZE) {
97 snprintf(buf, STR_BUFSIZE, "%s/log.fifo", player_tmp);
98 if(err || mkfifo(buf, S_IRUSR|S_IWUSR)) {
106 static void* wait_for_process(void *data) {
107 Player *player = data;
109 waitpid(player->process, &status, 0);
111 player->isactive = FALSE;
112 player->status = status;
117 static int start_player_process(Player *player, MainWindow *win) {
118 char log_arg[STR_BUFSIZE];
119 char ipc_arg[STR_BUFSIZE];
121 if(prepare_player(player, log_arg, ipc_arg)) {
125 char *player_bin = SettingsGetPlayerBin();
127 fprintf(stderr, "No mpv binary available\n");
131 // -wid parameter value for embedding the player in the player_widget
132 Window wid = XtWindow(win->player_widget);
133 char wid_arg[WID_ARG_BUFSIZE];
134 if(snprintf(wid_arg, WID_ARG_BUFSIZE, "%lu", wid) >= WID_ARG_BUFSIZE) {
138 // create player arg list
140 args[0] = player_bin;
143 args[3] = "--no-terminal";
149 posix_spawn_file_actions_t actions;
150 posix_spawn_file_actions_init(&actions);
152 //posix_spawn_file_actions_adddup2(&actions, pin[0], STDIN_FILENO);
153 //posix_spawn_file_actions_adddup2(&actions, pout[1], STDOUT_FILENO);
157 if(posix_spawn(&player_pid, player_bin, &actions, NULL, args, environ)) {
158 perror("posix_spawn");
161 posix_spawn_file_actions_destroy(&actions);
163 player->process = player_pid;
164 player->isactive = TRUE;
167 if(pthread_create(&tid, NULL, wait_for_process, player)) {
168 perror("pthread_create");
174 static int wait_for_ipc(Player *player) {
175 char buf[STR_BUFSIZE];
176 snprintf(buf, STR_BUFSIZE, "%s/log.fifo", player->tmp); // cannot fail
179 int fd_log = open(buf, O_RDONLY);
181 perror("Cannot open log");
184 player->log = fd_log;
186 // read log until IPC socket is created
187 char *scan_str = "Listening to IPC";
189 int scan_len = strlen(scan_str);
192 while((r = read(fd_log, buf, STR_BUFSIZE)) > 0) {
193 for(int i=0;i<r;i++) {
197 if(scan_pos == scan_len) {
202 if(scan_str[scan_pos] == c) {
208 if(ipc_listen) break;
214 static int connect_to_ipc(Player *player) {
215 // connect to IPC socket
216 int fd_ipc = socket(AF_UNIX, SOCK_STREAM, 0);
218 perror("Cannot create IPC socket");
221 player->ipc = fd_ipc;
223 char buf[STR_BUFSIZE];
224 snprintf(buf, STR_BUFSIZE, "%s/%s", player->tmp, "ipc.socket"); // cannot fail
226 struct sockaddr_un ipc_addr;
227 memset(&ipc_addr, 0, sizeof(struct sockaddr_un));
228 ipc_addr.sun_family = AF_UNIX;
229 memcpy(ipc_addr.sun_path, buf, strlen(buf));
230 if(connect(fd_ipc, (struct sockaddr *)&ipc_addr, sizeof(ipc_addr)) == -1) {
231 perror("Cannot connect to IPC socket");
238 static void* start_player(void *data) {
239 MainWindow *win = data;
241 Player *player = malloc(sizeof(Player));
242 memset(player, 0, sizeof(Player));
245 if(start_player_process(player, win)) {
246 PlayerDestroy(player);
250 // wait until IPC socket is ready
251 if(wait_for_ipc(player)) {
252 PlayerDestroy(player);
257 if(connect_to_ipc(player)) {
258 PlayerDestroy(player);
262 // set player in main window
264 PlayerDestroy(win->player);
266 win->player = player;
274 static void player_io(Player *p) {
275 struct pollfd fds[2];
277 fds[0].events = POLLIN;
279 JSONParser *js = json_parser_new();
281 char buf[PLAYER_IN_BUFSIZE];
282 while(p->isactive && poll(fds, 2, PLAYER_POLL_TIMEOUT)) {
283 if(fds[0].revents == POLLIN) {
285 if((r = read(fds[0].fd, buf, PLAYER_IN_BUFSIZE)) <= 0) {
288 //fwrite(buf, 1, r, stdout);
290 json_parser_fill(js, buf, r);
294 while((ret = json_read_value(js, &value)) == 1) {
295 handle_json_rpc_msg(p, value);
296 json_value_free(value);
300 fprintf(stderr, "JSON-RPC error\n");
305 char *cmd = "{ \"command\": [\"get_property\", \"playback-time\"], request_id=\"" REQ_ID_PLAYBACK_TIME "\" }\n";
306 //write(p->ipc, cmd, strlen(cmd));
310 printf("PlayerEnd: %s\n", strerror(errno));
315 static void handle_json_rpc_msg(Player *player, JSONValue *v) {
316 if(v->type != JSON_OBJECT) return;
318 JSONValue *request_id_v = json_obj_get(&v->value.object, "request_id");
319 JSONValue *event = NULL;
320 if(request_id_v && request_id_v->type == JSON_STRING) {
322 if(request_id_v->value.string.length == 2) {
323 request_id = 10 * (request_id_v->value.string.string[0] - '0') + (request_id_v->value.string.string[1] - '0');
324 handle_json_rpc_reqid(player, v, request_id);
327 } else if ((event = json_obj_get(&v->value.object, "event")) != NULL) {
328 handle_json_rpc_event(player, v, event);
331 //json_print(v, NULL, 0);
335 static Boolean player_widget_set_size(XtPointer data) {
336 Player *player = data;
337 MainWindow *win = GetMainWindow();
339 Dimension win_width, win_height;
340 XtVaGetValues(win->window, XmNwidth, &win_width, XmNheight, &win_height, NULL);
341 Dimension player_width, player_height;
342 XtVaGetValues(win->player_widget, XmNwidth, &player_width, XmNheight, &player_height, NULL);
344 Dimension new_width = player->width + win_width - player_width;
345 Dimension new_height = player->height + win_height - player_height;
348 XtVaSetValues(win->window, XmNwidth, new_width, XmNheight, new_height, NULL);
350 // set window aspect ratio
352 hints.flags = PAspect;
353 hints.min_aspect.x = new_width;
354 hints.min_aspect.y = new_height;
355 hints.max_aspect.x = new_width;
356 hints.max_aspect.y = new_height;
357 XSetWMNormalHints(XtDisplay(win->window), XtWindow(win->window), &hints);
364 static void player_set_size(Player *player, int width, int height) {
366 player->width = width;
369 player->height = height;
371 if(player->width > 0 && player->height > 0) {
372 AppExecProc(player_widget_set_size, player);
376 static void handle_json_rpc_reqid(Player *player, JSONValue *v, int reqid) {
377 JSONValue *data = json_obj_get(&v->value.object, "data");
381 case REQ_ID_PLAYBACK_TIME_INT: {
382 if(data->type == JSON_NUMBER) {
383 player->playback_time = data->value.number.value;
387 case REQ_ID_WIDTH_INT: {
388 if(data->type == JSON_INTEGER) {
389 player_set_size(player, data->value.integer.value, -1);
393 case REQ_ID_HEIGHT_INT: {
394 if(data->type == JSON_INTEGER) {
395 player_set_size(player, -1, data->value.integer.value);
402 static Boolean get_player_window(XtPointer data) {
404 MainWindow *win = GetMainWindow();
406 Widget player_wid = win->player_widget;
410 XQueryTree(XtDisplay(player_wid), XtWindow(player_wid), &root, &parent, &child, &nchild);
412 p->window = child[0];
419 static void handle_json_rpc_event(Player *p, JSONValue *v, JSONValue *event) {
420 if(!json_strcmp(event, "property-change")) {
421 JSONValue *name = json_obj_get(&v->value.object, "name");
422 JSONValue *data = json_obj_get(&v->value.object, "data");
423 if(!json_strcmp(name, "eof-reached")) {
424 if(data && data->type == JSON_LITERAL && data->value.literal.literal == JSON_TRUE) {
428 } else if(!p->isstarted && !json_strcmp(event, "playback-restart")) {
429 char *cmd = "{ \"command\": [\"observe_property\", 1, \"playback-time\"] }\n"
430 "{ \"command\": [\"observe_property\", 1, \"eof-reached\"] }\n"
431 "{ \"command\": [\"get_property\", \"width\"], request_id=\"" REQ_ID_WIDTH "\" }\n"
432 "{ \"command\": [\"get_property\", \"height\"], request_id=\"" REQ_ID_HEIGHT "\" }\n"
433 "{ \"command\": [\"set_property\", \"keep-open\", true] }\n";
434 write(p->ipc, cmd, strlen(cmd));
437 AppExecProc(get_player_window, p);
441 void PlayerDestroy(Player *p) {
454 kill(p->process, SIGTERM);
461 static void json_print(JSONValue *value, char *name, int indent) {
463 printf("%*s%s: ", indent*4, "", name);
465 printf("%*s", indent*4, "");
469 switch(value->type) {
473 for(int i=0;i<value->value.object.size;i++) {
474 JSONObjValue val = value->value.object.values[i];
475 json_print(val.value, val.name, indent+1);
476 if(i+1 < value->value.object.size) {
483 printf("%*s}", indent*4, "");
489 for(int i=0;i<value->value.object.size;i++) {
490 JSONValue *v = value->value.array.array[i];
491 json_print(v, NULL, indent+1);
492 if(i+1 < value->value.array.size) {
499 printf("%*s]", indent*4, "");
503 printf("\"%s\"", value->value.string.string);
507 printf("%i", (int)value->value.integer.value);
511 printf("%f", value->value.number.value);
516 switch(value->value.literal.literal) {
517 case JSON_NULL: break;
518 case JSON_TRUE: lit = "true"; break;
519 case JSON_FALSE: lit = "false"; break;
531 void PlayerEOF(Player *p) {
532 char *cmd = "{ \"command\": [\"set_property\", \"playback-time\", 0] }\n";
533 write(p->ipc, cmd, strlen(cmd));
536 void PlayerHandleInput(MainWindow *win, Player *p, XmDrawingAreaCallbackStruct *cb) {