playtreeparser.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 /// \file
  20 /// \ingroup PlaytreeParser
  21
  22 #include "config.h"
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include <assert.h>
  27 #include <errno.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <fcntl.h>
  31 #include <unistd.h>
  32 #include <ctype.h>
  33 #include <limits.h>
  34
  35 #include "talloc.h"
  36 #include "asxparser.h"
  37 #include "playtree.h"
  38 #include "playtreeparser.h"
  39 #include "stream/stream.h"
  40 #include "libmpdemux/demuxer.h"
  41 #include "mp_msg.h"
  42
  43
  44 #define BUF_STEP 1024
  45
  46 #define WHITES " \n\r\t"
  47
  48 static void
  49 strstrip(char* str) {
  50   char* i;
  51
  52   if (str==NULL)
  53     return;
  54   for(i = str ; i[0] != '\0' && strchr(WHITES,i[0]) != NULL; i++)
  55     /* NOTHING */;
  56   if(i[0] != '\0') {
  57     memmove(str,i,strlen(i) + 1);
  58     for(i = str + strlen(str) - 1 ; strchr(WHITES,i[0]) != NULL; i--)
  59       /* NOTHING */;
  60     i[1] = '\0';
  61   } else
  62     str[0] = '\0';
  63 }
  64
  65 static char*
  66 play_tree_parser_get_line(play_tree_parser_t* p) {
  67   char *end,*line_end;
  68   int r,resize = 0;
  69
  70   if(p->buffer == NULL) {
  71     p->buffer = malloc(BUF_STEP);
  72     p->buffer_size = BUF_STEP;
  73     p->buffer[0] = 0;
  74     p->iter = p->buffer;
  75   }
  76
  77   if(p->stream->eof && (p->buffer_end == 0 || p->iter[0] == '\0'))
  78     return NULL;
  79
  80   assert(p->buffer_end < p->buffer_size);
  81   assert(!p->buffer[p->buffer_end]);
  82   while(1) {
  83
  84     if(resize) {
  85       char *tmp;
  86       r = p->iter - p->buffer;
  87       end = p->buffer + p->buffer_end;
  88       if (p->buffer_size > INT_MAX - BUF_STEP)
  89         break;
  90       tmp = realloc(p->buffer, p->buffer_size + BUF_STEP);
  91       if (!tmp)
  92         break;
  93       p->buffer = tmp;
  94       p->iter = p->buffer + r;
  95       p->buffer_size += BUF_STEP;
  96       resize = 0;
  97     }
  98
  99     if(p->buffer_size - p->buffer_end > 1 && ! p->stream->eof) {
 100       r = stream_read(p->stream,p->buffer + p->buffer_end,p->buffer_size - p->buffer_end - 1);
 101       if(r > 0) {
 102         p->buffer_end += r;
 103         assert(p->buffer_end < p->buffer_size);
 104         p->buffer[p->buffer_end] = '\0';
 105         while(strlen(p->buffer + p->buffer_end - r) != r)
 106           p->buffer[p->buffer_end - r + strlen(p->buffer + p->buffer_end - r)] = '\n';
 107       }
 108       assert(!p->buffer[p->buffer_end]);
 109     }
 110
 111     end = strchr(p->iter,'\n');
 112     if(!end) {
 113       if(p->stream->eof) {
 114         end = p->buffer + p->buffer_end;
 115         break;
 116       }
 117       resize = 1;
 118       continue;
 119     }
 120     break;
 121   }
 122
 123   line_end = (end > p->iter && *(end-1) == '\r') ? end-1 : end;
 124   if(line_end - p->iter >= 0)
 125     p->line = realloc(p->line, line_end - p->iter + 1);
 126   else
 127     return NULL;
 128   if(line_end - p->iter > 0)
 129     strncpy(p->line,p->iter,line_end - p->iter);
 130   p->line[line_end - p->iter] = '\0';
 131   if(end[0] != '\0')
 132     end++;
 133
 134   if(!p->keep) {
 135     if(end[0] != '\0') {
 136       p->buffer_end -= end-p->iter;
 137       memmove(p->buffer,end,p->buffer_end);
 138     } else
 139       p->buffer_end = 0;
 140     p->buffer[p->buffer_end] = '\0';
 141     p->iter = p->buffer;
 142   } else
 143     p->iter = end;
 144
 145   return p->line;
 146 }
 147
 148 static void
 149 play_tree_parser_reset(play_tree_parser_t* p) {
 150   p->iter = p->buffer;
 151 }
 152
 153 static void
 154 play_tree_parser_stop_keeping(play_tree_parser_t* p) {
 155   p->keep = 0;
 156   if(p->iter && p->iter != p->buffer) {
 157     p->buffer_end -= p->iter -p->buffer;
 158     if(p->buffer_end)
 159       memmove(p->buffer,p->iter,p->buffer_end);
 160     p->buffer[p->buffer_end] = 0;
 161     p->iter = p->buffer;
 162   }
 163 }
 164
 165
 166 static play_tree_t*
 167 parse_asx(play_tree_parser_t* p) {
 168   int comments = 0,get_line = 1;
 169   char* line = NULL;
 170
 171   mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying asx...\n");
 172
 173   while(1) {
 174     if(get_line) {
 175       line = play_tree_parser_get_line(p);
 176       if(!line)
 177         return NULL;
 178       strstrip(line);
 179       if(line[0] == '\0')
 180         continue;
 181     }
 182     if(!comments) {
 183       if(line[0] != '<') {
 184         mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"First char isn't '<' but '%c'\n",line[0]);
 185         mp_msg(MSGT_PLAYTREE,MSGL_DBG3,"Buffer = [%s]\n",p->buffer);
 186         return NULL;
 187       } else if(strncmp(line,"<!--",4) == 0) { // Comments
 188         comments = 1;
 189         line += 4;
 190         if(line[0] != '\0' && strlen(line) > 0)
 191           get_line = 0;
 192       } else if(strncasecmp(line,"<ASX",4) == 0) // We got an asx element
 193         break;
 194       else // We don't get an asx
 195         return NULL;
 196     } else { // Comments
 197       char* c;
 198       c = strchr(line,'-');
 199       if(c) {
 200         if (strncmp(c,"--!>",4) == 0) { // End of comments
 201           comments = 0;
 202           line = c+4;
 203           if(line[0] != '\0') // There is some more data on this line : keep it
 204             get_line = 0;
 205
 206         } else {
 207           line = c+1; // Jump the -
 208           if(line[0] != '\0') // Some more data
 209             get_line = 0;
 210           else  // End of line
 211             get_line = 1;
 212         }
 213       } else // No - on this line (or rest of line) : get next one
 214         get_line = 1;
 215     }
 216   }
 217
 218   mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected asx format\n");
 219
 220   // We have an asx : load it in memory and parse
 221
 222   while((line = play_tree_parser_get_line(p)) != NULL)
 223     /* NOTHING */;
 224
 225  mp_msg(MSGT_PLAYTREE,MSGL_DBG3,"Parsing asx file: [%s]\n",p->buffer);
 226  return asx_parser_build_tree(p->opts, p->buffer,p->deep);
 227 }
 228
 229 static char*
 230 pls_entry_get_value(char* line) {
 231   char* i;
 232
 233   i = strchr(line,'=');
 234   if(!i || i[1] == '\0')
 235     return NULL;
 236   else
 237     return i+1;
 238 }
 239
 240 typedef struct pls_entry {
 241   char* file;
 242   char* title;
 243   char* length;
 244 } pls_entry_t;
 245
 246 static int
 247 pls_read_entry(char* line,pls_entry_t** _e,int* _max_entry,char** val) {
 248   int num,max_entry = (*_max_entry);
 249   pls_entry_t* e = (*_e);
 250   int limit = INT_MAX / sizeof(*e);
 251   char* v;
 252
 253   v = pls_entry_get_value(line);
 254   if(!v) {
 255     mp_msg(MSGT_PLAYTREE,MSGL_ERR,"No value in entry %s\n",line);
 256     return -1;
 257   }
 258
 259   num = atoi(line);
 260   if(num <= 0 || num > limit) {
 261     if (max_entry >= limit) {
 262         mp_msg(MSGT_PLAYTREE, MSGL_WARN, "Too many index entries\n");
 263         return -1;
 264     }
 265     num = max_entry+1;
 266     mp_msg(MSGT_PLAYTREE,MSGL_WARN,"No or invalid entry index in entry %s\nAssuming %d\n",line,num);
 267   }
 268   if(num > max_entry) {
 269     e = realloc(e, num * sizeof(pls_entry_t));
 270     if (!e)
 271       return -1;
 272     memset(&e[max_entry],0,(num-max_entry)*sizeof(pls_entry_t));
 273     max_entry = num;
 274   }
 275   (*_e) = e;
 276   (*_max_entry) = max_entry;
 277   (*val) = v;
 278
 279   return num;
 280 }
 281
 282
 283 static play_tree_t*
 284 parse_pls(play_tree_parser_t* p) {
 285   char *line,*v;
 286   pls_entry_t* entries = NULL;
 287   int n_entries = 0,max_entry=0,num;
 288   play_tree_t *list = NULL, *entry = NULL, *last_entry = NULL;
 289
 290   mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying Winamp playlist...\n");
 291   while((line = play_tree_parser_get_line(p))) {
 292     strstrip(line);
 293     if(strlen(line))
 294       break;
 295   }
 296   if (!line)
 297     return NULL;
 298   if(strcasecmp(line,"[playlist]"))
 299     return NULL;
 300   mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected Winamp playlist format\n");
 301   play_tree_parser_stop_keeping(p);
 302   line = play_tree_parser_get_line(p);
 303   if(!line)
 304     return NULL;
 305   strstrip(line);
 306   if(strncasecmp(line,"NumberOfEntries",15) == 0) {
 307     v = pls_entry_get_value(line);
 308     n_entries = atoi(v);
 309     if(n_entries < 0)
 310       mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Invalid number of entries: very funny!!!\n");
 311     else
 312       mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Playlist claims to have %d entries. Let's see.\n",n_entries);
 313     line = play_tree_parser_get_line(p);
 314   }
 315
 316   while(line) {
 317     strstrip(line);
 318     if(line[0] == '\0') {
 319       line = play_tree_parser_get_line(p);
 320       continue;
 321     }
 322     if(strncasecmp(line,"File",4) == 0) {
 323       num = pls_read_entry(line+4,&entries,&max_entry,&v);
 324       if(num < 0)
 325         mp_msg(MSGT_PLAYTREE,MSGL_ERR,"No value in entry %s\n",line);
 326       else
 327         entries[num-1].file = strdup(v);
 328     } else if(strncasecmp(line,"Title",5) == 0) {
 329       num = pls_read_entry(line+5,&entries,&max_entry,&v);
 330       if(num < 0)
 331         mp_msg(MSGT_PLAYTREE,MSGL_ERR,"No value in entry %s\n",line);
 332       else
 333         entries[num-1].title = strdup(v);
 334     } else if(strncasecmp(line,"Length",6) == 0) {
 335       num = pls_read_entry(line+6,&entries,&max_entry,&v);
 336       if(num < 0)
 337         mp_msg(MSGT_PLAYTREE,MSGL_ERR,"No value in entry %s\n",line);
 338       else {
 339         char *end;
 340         long val = strtol(v, &end, 10);
 341         if (*end || (val <= 0 && val != -1))
 342           mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Invalid length value in entry %s\n",line);
 343         else if (val > 0)
 344           entries[num-1].length = strdup(v);
 345       }
 346     } else
 347       mp_msg(MSGT_PLAYTREE,MSGL_WARN,"Unknown entry type %s\n",line);
 348     line = play_tree_parser_get_line(p);
 349   }
 350
 351   for(num = 0; num < max_entry ; num++) {
 352     if(entries[num].file == NULL)
 353       mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Entry %d don't have a file !!!!\n",num+1);
 354     else {
 355       mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Adding entry %s\n",entries[num].file);
 356       entry = play_tree_new();
 357       play_tree_add_file(entry,entries[num].file);
 358       if (entries[num].length)
 359           play_tree_set_param(entry, bstr("endpos"), bstr(entries[num].length));
 360       free(entries[num].file);
 361       if(list)
 362         play_tree_append_entry(last_entry,entry);
 363       else
 364         list = entry;
 365       last_entry = entry;
 366     }
 367     // When we have info in playtree we add these info
 368     free(entries[num].title);
 369     free(entries[num].length);
 370   }
 371
 372   free(entries);
 373
 374   if (!list)
 375     return NULL;
 376
 377   entry = play_tree_new();
 378   play_tree_set_child(entry,list);
 379   return entry;
 380 }
 381
 382 /*
 383  Reference Ini-Format: Each entry is assumed a reference
 384  */
 385 static play_tree_t*
 386 parse_ref_ini(play_tree_parser_t* p) {
 387   char *line,*v;
 388   play_tree_t *list = NULL, *entry = NULL, *last_entry = NULL;
 389
 390   mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying reference-ini playlist...\n");
 391   if (!(line = play_tree_parser_get_line(p)))
 392     return NULL;
 393   strstrip(line);
 394   if(strcasecmp(line,"[Reference]"))
 395     return NULL;
 396   mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected reference-ini playlist format\n");
 397   play_tree_parser_stop_keeping(p);
 398   line = play_tree_parser_get_line(p);
 399   if(!line)
 400     return NULL;
 401   while(line) {
 402     strstrip(line);
 403     if(strncasecmp(line,"Ref",3) == 0) {
 404       v = pls_entry_get_value(line+3);
 405       if(!v)
 406         mp_msg(MSGT_PLAYTREE,MSGL_ERR,"No value in entry %s\n",line);
 407       else
 408       {
 409         mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Adding entry %s\n",v);
 410         entry = play_tree_new();
 411         play_tree_add_file(entry,v);
 412         if(list)
 413           play_tree_append_entry(last_entry,entry);
 414         else
 415           list = entry;
 416         last_entry = entry;
 417       }
 418     }
 419     line = play_tree_parser_get_line(p);
 420   }
 421
 422   if(!list) return NULL;
 423   entry = play_tree_new();
 424   play_tree_set_child(entry,list);
 425   return entry;
 426 }
 427
 428 static play_tree_t*
 429 parse_m3u(play_tree_parser_t* p) {
 430   char* line;
 431   play_tree_t *list = NULL, *entry = NULL, *last_entry = NULL;
 432
 433   mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying extended m3u playlist...\n");
 434   if (!(line = play_tree_parser_get_line(p)))
 435     return NULL;
 436   strstrip(line);
 437   if(strcasecmp(line,"#EXTM3U"))
 438     return NULL;
 439   mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected extended m3u playlist format\n");
 440   play_tree_parser_stop_keeping(p);
 441
 442   while((line = play_tree_parser_get_line(p)) != NULL) {
 443     strstrip(line);
 444     if(line[0] == '\0')
 445       continue;
 446     /* EXTM3U files contain such lines:
 447      * #EXTINF:<seconds>, <title>
 448      * followed by a line with the filename
 449      * for now we have no place to put that
 450      * so we just skip that extra-info ::atmos
 451      */
 452     if(line[0] == '#') {
 453 #if 0 /* code functional */
 454       if(strncasecmp(line,"#EXTINF:",8) == 0) {
 455         mp_msg(MSGT_PLAYTREE,MSGL_INFO,"[M3U] Duration: %dsec  Title: %s\n",
 456           strtol(line+8,&line,10), line+2);
 457       }
 458 #endif
 459       continue;
 460     }
 461     entry = play_tree_new();
 462     play_tree_add_file(entry,line);
 463     if(!list)
 464       list = entry;
 465     else
 466       play_tree_append_entry(last_entry,entry);
 467     last_entry = entry;
 468   }
 469
 470   if(!list) return NULL;
 471   entry = play_tree_new();
 472   play_tree_set_child(entry,list);
 473   return entry;
 474 }
 475
 476 static play_tree_t*
 477 parse_smil(play_tree_parser_t* p) {
 478   int entrymode=0;
 479   char* line,source[512],*pos,*s_start,*s_end,*src_line;
 480   play_tree_t *list = NULL, *entry = NULL, *last_entry = NULL;
 481   int is_rmsmil = 0;
 482   unsigned int npkt, ttlpkt;
 483
 484   mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying smil playlist...\n");
 485
 486   // Check if smil
 487   while((line = play_tree_parser_get_line(p)) != NULL) {
 488     strstrip(line);
 489     if(line[0] == '\0') // Ignore empties
 490       continue;
 491     if (strncasecmp(line,"<?xml",5)==0) // smil in xml
 492       continue;
 493     if (strncasecmp(line,"<!DOCTYPE smil",13)==0) // smil in xml
 494       continue;
 495     if (strncasecmp(line,"<smil",5)==0 || strncasecmp(line,"<?wpl",5)==0 ||
 496       strncasecmp(line,"(smil-document",14)==0)
 497       break; // smil header found
 498     else
 499       return NULL; //line not smil exit
 500   }
 501
 502   if (!line) return NULL;
 503   mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected smil playlist format\n");
 504   play_tree_parser_stop_keeping(p);
 505
 506   if (strncasecmp(line,"(smil-document",14)==0) {
 507     mp_msg(MSGT_PLAYTREE,MSGL_V,"Special smil-over-realrtsp playlist header\n");
 508     is_rmsmil = 1;
 509     if (sscanf(line, "(smil-document (ver 1.0)(npkt %u)(ttlpkt %u", &npkt, &ttlpkt) != 2) {
 510       mp_msg(MSGT_PLAYTREE,MSGL_WARN,"smil-over-realrtsp: header parsing failure, assuming single packet.\n");
 511       npkt = ttlpkt = 1;
 512     }
 513     if (ttlpkt == 0 || npkt > ttlpkt) {
 514       mp_msg(MSGT_PLAYTREE,MSGL_WARN,"smil-over-realrtsp: bad packet counters (npkk = %u, ttlpkt = %u), assuming single packet.\n",
 515         npkt, ttlpkt);
 516       npkt = ttlpkt = 1;
 517     }
 518   }
 519
 520   //Get entries from smil
 521   src_line = line;
 522   line = NULL;
 523   do {
 524     strstrip(src_line);
 525     free(line);
 526     line = NULL;
 527     /* If we're parsing smil over realrtsp and this is not the last packet and
 528      * this is the last line in the packet (terminating with ") ) we must get
 529      * the next line, strip the header, and concatenate it to the current line.
 530      */
 531     if (is_rmsmil && npkt != ttlpkt && strstr(src_line,"\")")) {
 532       char *payload;
 533
 534       line = strdup(src_line);
 535       if(!(src_line = play_tree_parser_get_line(p))) {
 536         mp_msg(MSGT_PLAYTREE,MSGL_WARN,"smil-over-realrtsp: can't get line from packet %u/%u.\n", npkt, ttlpkt);
 537         break;
 538       }
 539       strstrip(src_line);
 540       // Skip header, packet starts after "
 541       if(!(payload = strchr(src_line,'\"'))) {
 542         mp_msg(MSGT_PLAYTREE,MSGL_WARN,"smil-over-realrtsp: can't find start of packet, using complete line.\n");
 543         payload = src_line;
 544       } else
 545         payload++;
 546       // Skip ") at the end of the last line from the current packet
 547       line[strlen(line)-2] = 0;
 548       line = realloc(line, strlen(line)+strlen(payload)+1);
 549       strcat (line, payload);
 550       npkt++;
 551     } else
 552       line = strdup(src_line);
 553     /* Unescape \" to " for smil-over-rtsp */
 554     if (is_rmsmil && line[0] != '\0') {
 555       int i, j;
 556
 557       for (i = 0; i < strlen(line); i++)
 558         if (line[i] == '\\' && line[i+1] == '"')
 559           for (j = i; line[j]; j++)
 560             line[j] = line[j+1];
 561     }
 562     pos = line;
 563    while (pos) {
 564     if (!entrymode) { // all entries filled so far
 565      while ((pos=strchr(pos, '<'))) {
 566       if (strncasecmp(pos,"<video",6)==0  || strncasecmp(pos,"<audio",6)==0 || strncasecmp(pos,"<media",6)==0) {
 567           entrymode=1;
 568           break; // Got a valid tag, exit '<' search loop
 569       }
 570       pos++;
 571      }
 572     }
 573     if (entrymode) { //Entry found but not yet filled
 574       pos = strstr(pos,"src=");   // Is source present on this line
 575       if (pos != NULL) {
 576         entrymode=0;
 577         if (pos[4] != '"' && pos[4] != '\'') {
 578           mp_msg(MSGT_PLAYTREE,MSGL_V,"Unknown delimiter %c in source line %s\n", pos[4], line);
 579           break;
 580         }
 581         s_start=pos+5;
 582         s_end=strchr(s_start,pos[4]);
 583         if (s_end == NULL) {
 584           mp_msg(MSGT_PLAYTREE,MSGL_V,"Error parsing this source line %s\n",line);
 585           break;
 586         }
 587         if (s_end-s_start> 511) {
 588           mp_msg(MSGT_PLAYTREE,MSGL_V,"Cannot store such a large source %s\n",line);
 589           break;
 590         }
 591         strncpy(source,s_start,s_end-s_start);
 592         source[(s_end-s_start)]='\0'; // Null terminate
 593         entry = play_tree_new();
 594         play_tree_add_file(entry,source);
 595         if(!list)  //Insert new entry
 596           list = entry;
 597         else
 598           play_tree_append_entry(last_entry,entry);
 599         last_entry = entry;
 600         pos = s_end;
 601       }
 602     }
 603    }
 604   } while((src_line = play_tree_parser_get_line(p)) != NULL);
 605
 606   free(line);
 607
 608   if(!list) return NULL; // Nothing found
 609
 610   entry = play_tree_new();
 611   play_tree_set_child(entry,list);
 612   return entry;
 613 }
 614
 615 static play_tree_t*
 616 embedded_playlist_parse(struct MPOpts *opts, char *line) {
 617   int f=DEMUXER_TYPE_PLAYLIST;
 618   stream_t* stream;
 619   play_tree_parser_t* ptp;
 620   play_tree_t* entry;
 621
 622   // Get stream opened to link
 623   stream=open_stream(line, opts, &f);
 624   if(!stream) {
 625     mp_msg(MSGT_PLAYTREE,MSGL_WARN,"Can't open playlist %s\n",line);
 626     return NULL;
 627   }
 628
 629   //add new playtree
 630   mp_msg(MSGT_PLAYTREE,MSGL_V,"Adding playlist %s to element entryref\n",line);
 631
 632   ptp = play_tree_parser_new(stream, opts, 1);
 633   entry = play_tree_parser_get_play_tree(ptp, 1);
 634   play_tree_parser_free(ptp);
 635   free_stream(stream);
 636
 637   return entry;
 638 }
 639
 640 static play_tree_t*
 641 parse_textplain(play_tree_parser_t* p) {
 642   char* line;
 643   char *c;
 644   int embedded;
 645   play_tree_t *list = NULL, *entry = NULL, *last_entry = NULL;
 646
 647   mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying plaintext playlist...\n");
 648   play_tree_parser_stop_keeping(p);
 649
 650   while((line = play_tree_parser_get_line(p)) != NULL) {
 651     strstrip(line);
 652     if(line[0] == '\0' || line[0] == '#' || (line[0] == '/' && line[1] == '/'))
 653       continue;
 654
 655     //Special check for embedded smil or ram reference in file
 656     embedded = 0;
 657     if (strlen(line) > 5)
 658       for(c = line; c[0]; c++ )
 659         if ( ((c[0] == '.') && //start with . and next have smil with optional ? or &
 660            (tolower(c[1]) == 's') && (tolower(c[2])== 'm') &&
 661            (tolower(c[3]) == 'i') && (tolower(c[4]) == 'l') &&
 662            (!c[5] || c[5] == '?' || c[5] == '&')) || // or
 663           ((c[0] == '.') && // start with . and next have smi or ram with optional ? or &
 664           ( ((tolower(c[1]) == 's') && (tolower(c[2])== 'm') && (tolower(c[3]) == 'i')) ||
 665             ((tolower(c[1]) == 'r') && (tolower(c[2])== 'a') && (tolower(c[3]) == 'm')) )
 666            && (!c[4] || c[4] == '?' || c[4] == '&')) ){
 667             entry=embedded_playlist_parse(p->opts, line);
 668           embedded = 1;
 669           break;
 670         }
 671
 672     if (!embedded) {      //regular file link
 673       entry = play_tree_new();
 674       play_tree_add_file(entry,line);
 675     }
 676
 677     if (entry != NULL) {
 678       if(!list)
 679         list = entry;
 680       else
 681         play_tree_append_entry(last_entry,entry);
 682       last_entry = entry;
 683     }
 684   }
 685
 686   if(!list) return NULL;
 687   entry = play_tree_new();
 688   play_tree_set_child(entry,list);
 689   return entry;
 690 }
 691
 692 /**
 693  * \brief decode the base64 used in nsc files
 694  * \param in input string, 0-terminated
 695  * \param buf output buffer, must point to memory suitable for realloc,
 696  *            will be NULL on failure.
 697  * \return decoded length in bytes
 698  */
 699 static int decode_nsc_base64(char *in, char **buf) {
 700   int i, j, n;
 701   if (in[0] != '0' || in[1] != '2')
 702     goto err_out;
 703   in += 2; // skip prefix
 704   if (strlen(in) < 16) // error out if nothing to decode
 705     goto err_out;
 706   in += 12; // skip encoded string length
 707   n = strlen(in) / 4;
 708   *buf = realloc(*buf, n * 3);
 709   for (i = 0; i < n; i++) {
 710     uint8_t c[4];
 711     for (j = 0; j < 4; j++) {
 712       c[j] = in[4 * i + j];
 713       if (c[j] >= '0' && c[j] <= '9') c[j] += 0 - '0';
 714       else if (c[j] >= 'A' && c[j] <= 'Z') c[j] += 10 - 'A';
 715       else if (c[j] >= 'a' && c[j] <= 'z') c[j] += 36 - 'a';
 716       else if (c[j] == '{') c[j] = 62;
 717       else if (c[j] == '}') c[j] = 63;
 718       else {
 719         mp_msg(MSGT_PLAYTREE, MSGL_ERR, "Invalid character %c (0x%02"PRIx8")\n", c[j], c[j]);
 720         goto err_out;
 721       }
 722     }
 723     (*buf)[3 * i] = (c[0] << 2) | (c[1] >> 4);
 724     (*buf)[3 * i + 1] = (c[1] << 4) | (c[2] >> 2);
 725     (*buf)[3 * i + 2] = (c[2] << 6) | c[3];
 726   }
 727   return 3 * n;
 728 err_out:
 729   free(*buf);
 730   *buf = NULL;
 731   return 0;
 732 }
 733
 734 /**
 735  * \brief "converts" utf16 to ascii by just discarding every second byte
 736  * \param buf buffer to convert
 737  * \param len lenght of buffer, must be > 0
 738  */
 739 static void utf16_to_ascii(char *buf, int len) {
 740   int i;
 741   if (len <= 0) return;
 742   for (i = 0; i < len / 2; i++)
 743     buf[i] = buf[i * 2];
 744   buf[i] = 0; // just in case
 745 }
 746
 747 static play_tree_t *parse_nsc(play_tree_parser_t* p) {
 748   char *line, *addr = NULL, *url, *unicast_url = NULL;
 749   int port = 0;
 750   play_tree_t *entry = NULL;
 751
 752   mp_msg(MSGT_PLAYTREE,MSGL_V,"Trying nsc playlist...\n");
 753   while((line = play_tree_parser_get_line(p)) != NULL) {
 754     strstrip(line);
 755     if(!line[0]) // Ignore empties
 756       continue;
 757     if (strncasecmp(line,"[Address]", 9) == 0)
 758       break; // nsc header found
 759     else
 760       return NULL;
 761   }
 762   mp_msg(MSGT_PLAYTREE,MSGL_V,"Detected nsc playlist format\n");
 763   play_tree_parser_stop_keeping(p);
 764   while ((line = play_tree_parser_get_line(p)) != NULL) {
 765     strstrip(line);
 766     if (!line[0])
 767       continue;
 768     if (strncasecmp(line, "Unicast URL=", 12) == 0) {
 769       int len = decode_nsc_base64(&line[12], &unicast_url);
 770       if (len <= 0)
 771         mp_msg(MSGT_PLAYTREE, MSGL_WARN, "[nsc] Unsupported Unicast URL encoding\n");
 772       else
 773         utf16_to_ascii(unicast_url, len);
 774     } else if (strncasecmp(line, "IP Address=", 11) == 0) {
 775       int len = decode_nsc_base64(&line[11], &addr);
 776       if (len <= 0)
 777         mp_msg(MSGT_PLAYTREE, MSGL_WARN, "[nsc] Unsupported IP Address encoding\n");
 778       else
 779         utf16_to_ascii(addr, len);
 780     } else if (strncasecmp(line, "IP Port=", 8) == 0) {
 781       port = strtol(&line[8], NULL, 0);
 782     }
 783   }
 784
 785   if (unicast_url)
 786     url = strdup(unicast_url);
 787   else if (addr && port) {
 788     url = malloc(strlen(addr) + 7 + 20 + 1);
 789     sprintf(url, "http://%s:%i", addr, port);
 790   } else
 791    goto out;
 792
 793   entry = play_tree_new();
 794   play_tree_add_file(entry, url);
 795   free(url);
 796 out:
 797   free(addr);
 798   free(unicast_url);
 799   return entry;
 800 }
 801
 802 play_tree_t*
 803 parse_playtree(stream_t *stream, struct MPOpts *opts, int forced) {
 804   play_tree_parser_t* p;
 805   play_tree_t* ret;
 806
 807   assert(stream != NULL);
 808
 809   p = play_tree_parser_new(stream, opts, 0);
 810   if(!p)
 811     return NULL;
 812
 813   ret = play_tree_parser_get_play_tree(p, forced);
 814   play_tree_parser_free(p);
 815
 816   return ret;
 817 }
 818
 819 static void
 820 play_tree_add_basepath(play_tree_t* pt, char* bp) {
 821   int i,bl = strlen(bp),fl;
 822
 823   if(pt->child) {
 824     play_tree_t* i;
 825     for(i = pt->child ; i != NULL ; i = i->next)
 826       play_tree_add_basepath(i,bp);
 827     return;
 828   }
 829
 830   if(!pt->files)
 831     return;
 832
 833   for(i = 0 ; pt->files[i] != NULL ; i++) {
 834     fl = strlen(pt->files[i]);
 835     // if we find a full unix path, url:// or X:\ at the beginning,
 836     // don't mangle it.
 837     if(fl <= 0 || strstr(pt->files[i],"://") || (strstr(pt->files[i],":\\") == pt->files[i] + 1) || (pt->files[i][0] == '/') )
 838       continue;
 839     // if the path begins with \ then prepend drive letter to it.
 840     if (pt->files[i][0] == '\\') {
 841       if (pt->files[i][1] == '\\')
 842         continue;
 843       pt->files[i] = realloc(pt->files[i], 2 + fl + 1);
 844       memmove(pt->files[i] + 2,pt->files[i],fl+1);
 845       memcpy(pt->files[i],bp,2);
 846       continue;
 847     }
 848     pt->files[i] = realloc(pt->files[i], bl + fl + 1);
 849     memmove(pt->files[i] + bl,pt->files[i],fl+1);
 850     memcpy(pt->files[i],bp,bl);
 851   }
 852 }
 853
 854 // Wrapper for play_tree_add_basepath (add base path from file)
 855 void play_tree_add_bpf(play_tree_t *pt, struct bstr filename)
 856 {
 857   char *ls, *file;
 858
 859   if (pt)
 860   {
 861     file = bstrdup0(NULL, filename);
 862     if (file)
 863     {
 864       ls = strrchr(file,'/');
 865       if(!ls) ls = strrchr(file,'\\');
 866       if(ls) {
 867         ls[1] = '\0';
 868         play_tree_add_basepath(pt,file);
 869       }
 870       talloc_free(file);
 871     }
 872   }
 873 }
 874
 875 play_tree_t*
 876 parse_playlist_file(struct MPOpts *opts, struct bstr file) {
 877   stream_t *stream;
 878   play_tree_t* ret;
 879   int f=DEMUXER_TYPE_PLAYLIST;
 880
 881   char *file0 = bstrdup0(NULL, file);
 882   stream = open_stream(file0, opts, &f);
 883   talloc_free(file0);
 884
 885   if(!stream) {
 886       mp_msg(MSGT_PLAYTREE,MSGL_ERR,
 887              "Error while opening playlist file %.*s: %s\n",
 888              BSTR_P(file), strerror(errno));
 889     return NULL;
 890   }
 891
 892   mp_msg(MSGT_PLAYTREE, MSGL_V,
 893          "Parsing playlist file %.*s...\n", BSTR_P(file));
 894
 895   ret = parse_playtree(stream, opts, 1);
 896   free_stream(stream);
 897
 898   play_tree_add_bpf(ret, file);
 899
 900   return ret;
 901
 902 }
 903
 904
 905 play_tree_parser_t*
 906 play_tree_parser_new(stream_t* stream, struct MPOpts *opts, int deep) {
 907   play_tree_parser_t* p;
 908
 909   p = calloc(1,sizeof(play_tree_parser_t));
 910   if(!p)
 911     return NULL;
 912   p->stream = stream;
 913   p->opts = opts;
 914   p->deep = deep;
 915   p->keep = 1;
 916
 917   return p;
 918
 919 }
 920
 921 void
 922 play_tree_parser_free(play_tree_parser_t* p) {
 923
 924   assert(p != NULL);
 925
 926   free(p->buffer);
 927   free(p->line);
 928   free(p);
 929 }
 930
 931 play_tree_t*
 932 play_tree_parser_get_play_tree(play_tree_parser_t* p, int forced) {
 933   play_tree_t* tree = NULL;
 934
 935   assert(p != NULL);
 936
 937   while(play_tree_parser_get_line(p) != NULL) {
 938     play_tree_parser_reset(p);
 939
 940     tree = parse_asx(p);
 941     if(tree) break;
 942     play_tree_parser_reset(p);
 943
 944     tree = parse_pls(p);
 945     if(tree) break;
 946     play_tree_parser_reset(p);
 947
 948     tree = parse_m3u(p);
 949     if(tree) break;
 950     play_tree_parser_reset(p);
 951
 952     tree = parse_ref_ini(p);
 953     if(tree) break;
 954     play_tree_parser_reset(p);
 955
 956     tree = parse_smil(p);
 957     if(tree) break;
 958     play_tree_parser_reset(p);
 959
 960     tree = parse_nsc(p);
 961     if(tree) break;
 962     play_tree_parser_reset(p);
 963
 964     // Here come the others formats ( textplain must stay the last one )
 965     if (forced)
 966     {
 967       tree = parse_textplain(p);
 968       if(tree) break;
 969     }
 970     break;
 971   }
 972
 973   if(tree)
 974     mp_msg(MSGT_PLAYTREE,MSGL_V,"Playlist successfully parsed\n");
 975   else
 976     mp_msg(MSGT_PLAYTREE,((forced==1)?MSGL_ERR:MSGL_V),"Error while parsing playlist\n");
 977
 978   if(tree)
 979     tree = play_tree_cleanup(tree);
 980
 981   if(!tree) mp_msg(MSGT_PLAYTREE,((forced==1)?MSGL_WARN:MSGL_V),"Warning: empty playlist\n");
 982
 983   return tree;
 984 }