input.c

   1 /*
   2  * Copyright 2004-2005 Timo Hirvonen
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  17  * 02111-1307, USA.
  18  */
  19
  20 #include <input.h>
  21 #include <ip.h>
  22 #include <pcm.h>
  23 #include <http.h>
  24 #include <xmalloc.h>
  25 #include <file.h>
  26 #include <utils.h>
  27 #include <cmus.h>
  28 #include <list.h>
  29 #include <prog.h>
  30 #include <misc.h>
  31 #include <debug.h>
  32 #include "config/libdir.h"
  33 #include "config/version.h"
  34
  35 #include <unistd.h>
  36 #include <string.h>
  37 #include <errno.h>
  38 #include <stdarg.h>
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <fcntl.h>
  42 #include <dirent.h>
  43 #include <dlfcn.h>
  44
  45 struct input_plugin {
  46         const struct input_plugin_ops *ops;
  47         struct input_plugin_data data;
  48         unsigned int open : 1;
  49         unsigned int eof : 1;
  50         int http_code;
  51         char *http_reason;
  52
  53         /*
  54          * pcm is converted to 16-bit signed little-endian stereo
  55          * NOTE: no conversion is done if channels > 2 or bits > 16
  56          */
  57         void (*pcm_convert)(char *, const char *, int);
  58         void (*pcm_convert_in_place)(char *, int);
  59         /*
  60          * 4  if 8-bit mono
  61          * 2  if 8-bit stereo or 16-bit mono
  62          * 1  otherwise
  63          */
  64         int pcm_convert_scale;
  65 };
  66
  67 struct ip {
  68         struct list_head node;
  69         char *name;
  70         void *handle;
  71
  72         const char * const *extensions;
  73         const char * const *mime_types;
  74         const struct input_plugin_ops *ops;
  75 };
  76
  77 static const char * const plugin_dir = LIBDIR "/cmus/ip";
  78 static LIST_HEAD(ip_head);
  79
  80 /* timeouts (ms) */
  81 static int http_connection_timeout = 5e3;
  82 static int http_read_timeout = 5e3;
  83
  84 static const char *get_extension(const char *filename)
  85 {
  86         const char *ext;
  87
  88         ext = filename + strlen(filename) - 1;
  89         while (ext >= filename && *ext != '/') {
  90                 if (*ext == '.') {
  91                         ext++;
  92                         return ext;
  93                 }
  94                 ext--;
  95         }
  96         return NULL;
  97 }
  98
  99 static const struct input_plugin_ops *get_ops_by_filename(const char *filename)
 100 {
 101         struct ip *ip;
 102         const char *ext;
 103
 104         ext = get_extension(filename);
 105         if (ext == NULL)
 106                 return NULL;
 107         list_for_each_entry(ip, &ip_head, node) {
 108                 const char * const *exts = ip->extensions;
 109                 int i;
 110
 111                 for (i = 0; exts[i]; i++) {
 112                         if (strcasecmp(ext, exts[i]) == 0)
 113                                 return ip->ops;
 114                 }
 115         }
 116         return NULL;
 117 }
 118
 119 static const struct input_plugin_ops *get_ops_by_mime_type(const char *mime_type)
 120 {
 121         struct ip *ip;
 122
 123         list_for_each_entry(ip, &ip_head, node) {
 124                 const char * const *types = ip->mime_types;
 125                 int i;
 126
 127                 for (i = 0; types[i]; i++) {
 128                         if (strcasecmp(mime_type, types[i]) == 0)
 129                                 return ip->ops;
 130                 }
 131         }
 132         return NULL;
 133 }
 134
 135 static int do_http_get(const char *uri, struct http_header **headersp, int *codep, char **reasonp)
 136 {
 137         struct http_uri u;
 138         struct http_header *h;
 139         int sock, i, rc, code;
 140         char *reason;
 141
 142         *headersp = NULL;
 143         *codep = -1;
 144         *reasonp = NULL;
 145
 146         if (http_parse_uri(uri, &u))
 147                 return -IP_ERROR_INVALID_URI;
 148
 149 /*      d_print("%s -> '%s':'%s'@'%s':%d'%s'\n", uri, user, pass, host, port, path); */
 150
 151         sock = http_open(u.host, u.port, http_connection_timeout);
 152         if (sock == -1) {
 153                 http_free_uri(&u);
 154                 return -IP_ERROR_ERRNO;
 155         }
 156
 157         h = xnew(struct http_header, 5);
 158         i = 0;
 159         h[i].key = xstrdup("Host");
 160         h[i].val = xstrdup(u.host);
 161         i++;
 162         h[i].key = xstrdup("User-Agent");
 163         h[i].val = xstrdup("cmus/" VERSION);
 164         i++;
 165         h[i].key = xstrdup("Icy-MetaData");
 166         h[i].val = xstrdup("1");
 167         i++;
 168         if (u.user && u.pass) {
 169                 char buf[256];
 170                 char *encoded;
 171
 172                 snprintf(buf, sizeof(buf), "%s:%s", u.user, u.pass);
 173                 encoded = base64_encode(buf);
 174                 if (encoded == NULL) {
 175                         d_print("couldn't base64 encode '%s'\n", buf);
 176                 } else {
 177                         snprintf(buf, sizeof(buf), "Basic %s", encoded);
 178                         free(encoded);
 179                         h[i].key = xstrdup("Authorization");
 180                         h[i].val = xstrdup(buf);
 181                         i++;
 182                 }
 183         }
 184         h[i].key = NULL;
 185         h[i].val = NULL;
 186         i++;
 187
 188         rc = http_get(sock, u.path, h, &code, &reason, headersp, http_read_timeout);
 189         http_headers_free(h);
 190         http_free_uri(&u);
 191         switch (rc) {
 192         case -1:
 193                 d_print("error: %s\n", strerror(errno));
 194                 close(sock);
 195                 return -IP_ERROR_ERRNO;
 196         case -2:
 197                 d_print("error parsing HTTP response\n");
 198                 close(sock);
 199                 return -IP_ERROR_HTTP_RESPONSE;
 200         }
 201         d_print("HTTP response: %d %s\n", code, reason);
 202         if (code != 200) {
 203                 *codep = code;
 204                 *reasonp = reason;
 205                 close(sock);
 206                 return -IP_ERROR_HTTP_STATUS;
 207         }
 208         free(reason);
 209         return sock;
 210 }
 211
 212 static int setup_remote(struct input_plugin *ip, const struct http_header *headers, int sock)
 213 {
 214         const char *val;
 215
 216         val = http_headers_get_value(headers, "Content-Type");
 217         if (val) {
 218                 ip->ops = get_ops_by_mime_type(val);
 219                 if (ip->ops == NULL) {
 220                         d_print("unsupported content type: %s\n", val);
 221                         close(sock);
 222                         return -IP_ERROR_FILE_FORMAT;
 223                 }
 224         } else {
 225                 const char *type = "audio/mpeg";
 226
 227                 d_print("assuming %s content type\n", type);
 228                 ip->ops = get_ops_by_mime_type(type);
 229                 if (ip->ops == NULL) {
 230                         d_print("unsupported content type: %s\n", type);
 231                         close(sock);
 232                         return -IP_ERROR_FILE_FORMAT;
 233                 }
 234         }
 235
 236         ip->data.fd = sock;
 237         ip->data.metadata = (char *)xmalloc(16 * 255 + 1);
 238
 239         val = http_headers_get_value(headers, "icy-metaint");
 240         if (val) {
 241                 long int lint;
 242
 243                 if (str_to_int(val, &lint) == 0 && lint >= 0) {
 244                         ip->data.metaint = lint;
 245                         d_print("metaint: %d\n", ip->data.metaint);
 246                 }
 247         }
 248         return 0;
 249 }
 250
 251 static int handle_line(void *data, const char *line)
 252 {
 253         char **firstp = data;
 254
 255         *firstp = xstrdup(line);
 256         /* ignore other lines */
 257         return 1;
 258 }
 259
 260 static int read_playlist(struct input_plugin *ip, int sock)
 261 {
 262         struct http_header *headers;
 263         char *body, *reason, *first;
 264         int rc, code;
 265
 266         rc = http_read_body(sock, &body, http_read_timeout);
 267         close(sock);
 268         if (rc)
 269                 return -IP_ERROR_ERRNO;
 270
 271         /* get only first URL from the playlist */
 272         first = NULL;
 273         cmus_playlist_for_each(body, strlen(body), 0, handle_line, &first);
 274         free(body);
 275
 276         if (first == NULL) {
 277                 d_print("empty playlist\n");
 278                 return -IP_ERROR_HTTP_RESPONSE;
 279         }
 280
 281         sock = do_http_get(first, &headers, &code, &reason);
 282         free(first);
 283         if (sock < 0) {
 284                 ip->http_code = code;
 285                 ip->http_reason = reason;
 286                 /* URI in the _playlist_ is invalid, not our fault */
 287                 if (sock == -IP_ERROR_INVALID_URI)
 288                         sock = -IP_ERROR_HTTP_RESPONSE;
 289                 return sock;
 290         }
 291
 292         rc = setup_remote(ip, headers, sock);
 293         http_headers_free(headers);
 294         return rc;
 295 }
 296
 297 static int open_remote(struct input_plugin *ip)
 298 {
 299         struct input_plugin_data *d = &ip->data;
 300         char *reason;
 301         int sock, rc, code;
 302         struct http_header *headers;
 303         const char *val;
 304
 305         sock = do_http_get(d->filename, &headers, &code, &reason);
 306         if (sock < 0) {
 307                 ip->http_code = code;
 308                 ip->http_reason = reason;
 309                 return sock;
 310         }
 311
 312         val = http_headers_get_value(headers, "Content-Type");
 313         if (val) {
 314                 d_print("Content-Type: %s\n", val);
 315                 if (!strcasecmp(val, "audio/x-scpls") || !strcasecmp(val, "audio/m3u")) {
 316                         http_headers_free(headers);
 317                         return read_playlist(ip, sock);
 318                 }
 319         }
 320
 321         rc = setup_remote(ip, headers, sock);
 322         http_headers_free(headers);
 323         return rc;
 324 }
 325
 326 static int open_file(struct input_plugin *ip)
 327 {
 328         ip->ops = get_ops_by_filename(ip->data.filename);
 329         if (ip->ops == NULL)
 330                 return -IP_ERROR_UNRECOGNIZED_FILE_TYPE;
 331         ip->data.fd = open(ip->data.filename, O_RDONLY);
 332         if (ip->data.fd == -1) {
 333                 ip->ops = NULL;
 334                 return -IP_ERROR_ERRNO;
 335         }
 336         return 0;
 337 }
 338
 339 void ip_load_plugins(void)
 340 {
 341         DIR *dir;
 342         struct dirent *d;
 343
 344         dir = opendir(plugin_dir);
 345         if (dir == NULL) {
 346                 warn_errno("couldn't open directory `%s'", plugin_dir);
 347                 return;
 348         }
 349         while ((d = readdir(dir)) != NULL) {
 350                 char filename[256];
 351                 struct ip *ip;
 352                 void *so;
 353                 char *ext;
 354                 const char *sym;
 355
 356                 if (d->d_name[0] == '.')
 357                         continue;
 358                 ext = strrchr(d->d_name, '.');
 359                 if (ext == NULL)
 360                         continue;
 361                 if (strcmp(ext, ".so"))
 362                         continue;
 363
 364                 snprintf(filename, sizeof(filename), "%s/%s", plugin_dir, d->d_name);
 365
 366                 so = dlopen(filename, RTLD_NOW);
 367                 if (so == NULL) {
 368                         warn("%s\n", dlerror());
 369                         continue;
 370                 }
 371
 372                 ip = xnew(struct ip, 1);
 373
 374                 sym = "ip_extensions";
 375                 if (!(ip->extensions = dlsym(so, sym)))
 376                         goto sym_err;
 377
 378                 sym = "ip_mime_types";
 379                 if (!(ip->mime_types = dlsym(so, sym)))
 380                         goto sym_err;
 381
 382                 sym = "ip_ops";
 383                 if (!(ip->ops = dlsym(so, sym)))
 384                         goto sym_err;
 385
 386                 ip->name = xstrndup(d->d_name, ext - d->d_name);
 387                 ip->handle = so;
 388
 389                 list_add_tail(&ip->node, &ip_head);
 390                 continue;
 391 sym_err:
 392                 warn("%s: symbol %s not found\n", filename, sym);
 393                 free(ip);
 394                 dlclose(so);
 395         }
 396         closedir(dir);
 397 }
 398
 399 static void ip_init(struct input_plugin *ip, char *filename)
 400 {
 401         memset(ip, 0, sizeof(*ip));
 402         ip->http_code = -1;
 403         ip->pcm_convert_scale = -1;
 404         ip->data.fd = -1;
 405         ip->data.filename = filename;
 406         ip->data.remote = is_url(filename);
 407 }
 408
 409 struct input_plugin *ip_new(const char *filename)
 410 {
 411         struct input_plugin *ip = xnew(struct input_plugin, 1);
 412
 413         ip_init(ip, xstrdup(filename));
 414         return ip;
 415 }
 416
 417 void ip_delete(struct input_plugin *ip)
 418 {
 419         if (ip->open)
 420                 ip_close(ip);
 421         free(ip->data.filename);
 422         free(ip);
 423 }
 424
 425 int ip_open(struct input_plugin *ip)
 426 {
 427         unsigned int bits, is_signed, channels;
 428         int rc;
 429         sample_format_t sf;
 430
 431         BUG_ON(ip->open);
 432
 433         /* set fd and ops */
 434         if (ip->data.remote) {
 435                 rc = open_remote(ip);
 436         } else {
 437                 rc = open_file(ip);
 438         }
 439
 440         if (rc) {
 441                 d_print("opening `%s' failed: %d %s\n", ip->data.filename, rc,
 442                                 rc == -1 ? strerror(errno) : "");
 443                 return rc;
 444         }
 445
 446         rc = ip->ops->open(&ip->data);
 447         if (rc) {
 448                 d_print("opening file `%s' failed: %d %s\n", ip->data.filename, rc,
 449                                 rc == -1 ? strerror(errno) : "");
 450                 if (ip->data.fd != -1)
 451                         close(ip->data.fd);
 452                 ip->data.fd = -1;
 453                 ip->ops = NULL;
 454                 free(ip->data.metadata);
 455                 ip->data.metadata = NULL;
 456                 return rc;
 457         }
 458
 459         sf = ip->data.sf;
 460
 461         bits = sf_get_bits(sf);
 462         is_signed = sf_get_signed(sf);
 463         channels = sf_get_channels(sf);
 464
 465         ip->pcm_convert_scale = 1;
 466         ip->pcm_convert = NULL;
 467         ip->pcm_convert_in_place = NULL;
 468
 469         if (bits <= 16 && channels <= 2) {
 470                 unsigned int mask = ((bits >> 2) & 4) | (is_signed << 1);
 471
 472                 ip->pcm_convert = pcm_conv[mask | (channels - 1)];
 473                 ip->pcm_convert_in_place = pcm_conv_in_place[mask | sf_get_bigendian(sf)];
 474
 475                 ip->pcm_convert_scale = (3 - channels) * (3 - bits / 8);
 476         }
 477
 478         d_print("pcm convert: scale=%d convert=%d convert_in_place=%d\n",
 479                         ip->pcm_convert_scale,
 480                         ip->pcm_convert != NULL,
 481                         ip->pcm_convert_in_place != NULL);
 482
 483         ip->open = 1;
 484         return 0;
 485 }
 486
 487 int ip_close(struct input_plugin *ip)
 488 {
 489         int rc;
 490
 491         rc = ip->ops->close(&ip->data);
 492         BUG_ON(ip->data.private);
 493         if (ip->data.fd != -1)
 494                 close(ip->data.fd);
 495         free(ip->data.metadata);
 496         free(ip->http_reason);
 497
 498         ip_init(ip, ip->data.filename);
 499         return rc;
 500 }
 501
 502 int ip_read(struct input_plugin *ip, char *buffer, int count)
 503 {
 504         struct timeval tv;
 505         fd_set readfds;
 506         /* 4608 seems to be optimal for mp3s, 4096 for oggs */
 507         char tmp[8 * 1024];
 508         char *buf;
 509         int rc;
 510
 511         BUG_ON(count <= 0);
 512
 513         FD_ZERO(&readfds);
 514         FD_SET(ip->data.fd, &readfds);
 515         /* zero timeout -> return immediately */
 516         tv.tv_sec = 0;
 517         tv.tv_usec = 50e3;
 518         rc = select(ip->data.fd + 1, &readfds, NULL, NULL, &tv);
 519         if (rc == -1) {
 520                 d_print("select: error: %s\n", strerror(errno));
 521                 if (errno == EINTR)
 522                         errno = EAGAIN;
 523                 return -1;
 524         }
 525         if (rc == 0) {
 526                 errno = EAGAIN;
 527                 return -1;
 528         }
 529
 530         buf = buffer;
 531         if (ip->pcm_convert_scale > 1) {
 532                 /* use tmp buffer for 16-bit mono and 8-bit */
 533                 buf = tmp;
 534                 count /= ip->pcm_convert_scale;
 535                 if (count > sizeof(tmp))
 536                         count = sizeof(tmp);
 537         }
 538
 539         rc = ip->ops->read(&ip->data, buf, count);
 540         if (rc == 0)
 541                 ip->eof = 1;
 542         if (rc == -1)
 543                 d_print("error: %s\n", strerror(errno));
 544
 545         if (rc > 0) {
 546                 int sample_size = sf_get_sample_size(ip->data.sf);
 547
 548                 if (ip->pcm_convert_in_place != NULL)
 549                         ip->pcm_convert_in_place(buf, rc / sample_size);
 550                 if (ip->pcm_convert != NULL)
 551                         ip->pcm_convert(buffer, tmp, rc / sample_size);
 552                 rc *= ip->pcm_convert_scale;
 553         }
 554         return rc;
 555 }
 556
 557 int ip_seek(struct input_plugin *ip, double offset)
 558 {
 559         int rc;
 560
 561         if (ip->data.remote)
 562                 return -IP_ERROR_FUNCTION_NOT_SUPPORTED;
 563         rc = ip->ops->seek(&ip->data, offset);
 564         if (rc == 0)
 565                 ip->eof = 0;
 566         return rc;
 567 }
 568
 569 int ip_read_comments(struct input_plugin *ip, struct keyval **comments)
 570 {
 571         return ip->ops->read_comments(&ip->data, comments);
 572 }
 573
 574 int ip_duration(struct input_plugin *ip)
 575 {
 576         return ip->ops->duration(&ip->data);
 577 }
 578
 579 sample_format_t ip_get_sf(struct input_plugin *ip)
 580 {
 581         BUG_ON(!ip->open);
 582         return ip->data.sf;
 583 }
 584
 585 const char *ip_get_filename(struct input_plugin *ip)
 586 {
 587         return ip->data.filename;
 588 }
 589
 590 const char *ip_get_metadata(struct input_plugin *ip)
 591 {
 592         BUG_ON(!ip->open);
 593         return ip->data.metadata;
 594 }
 595
 596 int ip_is_remote(struct input_plugin *ip)
 597 {
 598         return ip->data.remote;
 599 }
 600
 601 int ip_metadata_changed(struct input_plugin *ip)
 602 {
 603         int ret = ip->data.metadata_changed;
 604
 605         BUG_ON(!ip->open);
 606         ip->data.metadata_changed = 0;
 607         return ret;
 608 }
 609
 610 int ip_eof(struct input_plugin *ip)
 611 {
 612         BUG_ON(!ip->open);
 613         return ip->eof;
 614 }
 615
 616 char *ip_get_error_msg(struct input_plugin *ip, int rc, const char *arg)
 617 {
 618         char buffer[1024];
 619
 620         switch (-rc) {
 621         case IP_ERROR_ERRNO:
 622                 snprintf(buffer, sizeof(buffer), "%s: %s", arg, strerror(errno));
 623                 break;
 624         case IP_ERROR_UNRECOGNIZED_FILE_TYPE:
 625                 snprintf(buffer, sizeof(buffer),
 626                                 "%s: unrecognized filename extension", arg);
 627                 break;
 628         case IP_ERROR_FUNCTION_NOT_SUPPORTED:
 629                 snprintf(buffer, sizeof(buffer),
 630                                 "%s: function not supported", arg);
 631                 break;
 632         case IP_ERROR_FILE_FORMAT:
 633                 snprintf(buffer, sizeof(buffer),
 634                                 "%s: file format not supported or corrupted file",
 635                                 arg);
 636                 break;
 637         case IP_ERROR_INVALID_URI:
 638                 snprintf(buffer, sizeof(buffer), "%s: invalid URI", arg);
 639                 break;
 640         case IP_ERROR_SAMPLE_FORMAT:
 641                 snprintf(buffer, sizeof(buffer),
 642                                 "%s: input plugin doesn't support the sample format",
 643                                 arg);
 644                 break;
 645         case IP_ERROR_HTTP_RESPONSE:
 646                 snprintf(buffer, sizeof(buffer), "%s: invalid HTTP response", arg);
 647                 break;
 648         case IP_ERROR_HTTP_STATUS:
 649                 snprintf(buffer, sizeof(buffer), "%s: %d %s", arg, ip->http_code, ip->http_reason);
 650                 free(ip->http_reason);
 651                 ip->http_reason = NULL;
 652                 ip->http_code = -1;
 653                 break;
 654         case IP_ERROR_INTERNAL:
 655                 snprintf(buffer, sizeof(buffer), "%s: internal error", arg);
 656                 break;
 657         case IP_ERROR_SUCCESS:
 658         default:
 659                 snprintf(buffer, sizeof(buffer),
 660                                 "%s: this is not an error (%d), this is a bug",
 661                                 arg, rc);
 662                 break;
 663         }
 664         return xstrdup(buffer);
 665 }
 666
 667 char **ip_get_supported_extensions(void)
 668 {
 669         struct ip *ip;
 670         char **exts;
 671         int i, size;
 672         int count = 0;
 673
 674         size = 8;
 675         exts = xnew(char *, size);
 676         list_for_each_entry(ip, &ip_head, node) {
 677                 const char * const *e = ip->extensions;
 678
 679                 for (i = 0; e[i]; i++) {
 680                         if (count == size - 1) {
 681                                 size *= 2;
 682                                 exts = xrenew(char *, exts, size);
 683                         }
 684                         exts[count++] = xstrdup(e[i]);
 685                 }
 686         }
 687         exts[count] = NULL;
 688         qsort(exts, count, sizeof(char *), strptrcmp);
 689         return exts;
 690 }
 691
 692 void ip_dump_plugins(void)
 693 {
 694         struct ip *ip;
 695         int i;
 696
 697         printf("Input Plugins: %s\n", plugin_dir);
 698         list_for_each_entry(ip, &ip_head, node) {
 699                 printf("  %s:\n    File Types:", ip->name);
 700                 for (i = 0; ip->extensions[i]; i++)
 701                         printf(" %s", ip->extensions[i]);
 702                 printf("\n    MIME Types:");
 703                 for (i = 0; ip->mime_types[i]; i++)
 704                         printf(" %s", ip->mime_types[i]);
 705                 printf("\n");
 706         }
 707 }