lib/service/servicemp3.cpp

   1 #ifdef HAVE_GSTREAMER
   2
   3         /* note: this requires gstreamer 0.10.x and a big list of plugins. */
   4         /* it's currently hardcoded to use a big-endian alsasink as sink. */
   5 #include <lib/base/eerror.h>
   6 #include <lib/base/object.h>
   7 #include <lib/base/ebase.h>
   8 #include <string>
   9 #include <lib/service/servicemp3.h>
  10 #include <lib/service/service.h>
  11 #include <lib/base/init_num.h>
  12 #include <lib/base/init.h>
  13 #include <gst/gst.h>
  14
  15 // eServiceFactoryMP3
  16
  17 eServiceFactoryMP3::eServiceFactoryMP3()
  18 {
  19         ePtr<eServiceCenter> sc;
  20
  21         eServiceCenter::getPrivInstance(sc);
  22         if (sc)
  23                 sc->addServiceFactory(eServiceFactoryMP3::id, this);
  24
  25         m_service_info = new eStaticServiceMP3Info();
  26 }
  27
  28 eServiceFactoryMP3::~eServiceFactoryMP3()
  29 {
  30         ePtr<eServiceCenter> sc;
  31
  32         eServiceCenter::getPrivInstance(sc);
  33         if (sc)
  34                 sc->removeServiceFactory(eServiceFactoryMP3::id);
  35 }
  36
  37 DEFINE_REF(eServiceFactoryMP3)
  38
  39         // iServiceHandler
  40 RESULT eServiceFactoryMP3::play(const eServiceReference &ref, ePtr<iPlayableService> &ptr)
  41 {
  42                 // check resources...
  43         ptr = new eServiceMP3(ref.path.c_str());
  44         return 0;
  45 }
  46
  47 RESULT eServiceFactoryMP3::record(const eServiceReference &ref, ePtr<iRecordableService> &ptr)
  48 {
  49         ptr=0;
  50         return -1;
  51 }
  52
  53 RESULT eServiceFactoryMP3::list(const eServiceReference &, ePtr<iListableService> &ptr)
  54 {
  55         ptr=0;
  56         return -1;
  57 }
  58
  59 RESULT eServiceFactoryMP3::info(const eServiceReference &ref, ePtr<iStaticServiceInformation> &ptr)
  60 {
  61         ptr = m_service_info;
  62         return 0;
  63 }
  64
  65 RESULT eServiceFactoryMP3::offlineOperations(const eServiceReference &, ePtr<iServiceOfflineOperations> &ptr)
  66 {
  67         ptr = 0;
  68         return -1;
  69 }
  70
  71
  72 // eStaticServiceMP3Info
  73
  74
  75 // eStaticServiceMP3Info is seperated from eServiceMP3 to give information
  76 // about unopened files.
  77
  78 // probably eServiceMP3 should use this class as well, and eStaticServiceMP3Info
  79 // should have a database backend where ID3-files etc. are cached.
  80 // this would allow listing the mp3 database based on certain filters.
  81
  82 DEFINE_REF(eStaticServiceMP3Info)
  83
  84 eStaticServiceMP3Info::eStaticServiceMP3Info()
  85 {
  86 }
  87
  88 RESULT eStaticServiceMP3Info::getName(const eServiceReference &ref, std::string &name)
  89 {
  90         size_t last = ref.path.rfind('/');
  91         if (last != std::string::npos)
  92                 name = ref.path.substr(last+1);
  93         else
  94                 name = ref.path;
  95         return 0;
  96 }
  97
  98 int eStaticServiceMP3Info::getLength(const eServiceReference &ref)
  99 {
 100         return -1;
 101 }
 102
 103 // eServiceMP3
 104
 105 eServiceMP3::eServiceMP3(const char *filename): m_filename(filename), m_pump(eApp, 1)
 106 {
 107         m_stream_tags = 0;
 108         CONNECT(m_pump.recv_msg, eServiceMP3::gstPoll);
 109         GstElement *source = 0;
 110
 111         GstElement *filter = 0, *decoder = 0, *conv = 0, *flt = 0, *sink = 0; /* for audio */
 112
 113         GstElement *audio = 0, *queue_audio = 0, *video = 0, *queue_video = 0, *mpegdemux = 0;
 114
 115         m_state = stIdle;
 116         eDebug("SERVICEMP3 construct!");
 117
 118                 /* FIXME: currently, decodebin isn't possible for
 119                    video streams. in that case, make a manual pipeline. */
 120
 121         const char *ext = strrchr(filename, '.');
 122         if (!ext)
 123                 ext = filename;
 124
 125         int is_mpeg_ps = !(strcasecmp(ext, ".mpeg") && strcasecmp(ext, ".mpg") && strcasecmp(ext, ".vob") && strcasecmp(ext, ".bin"));
 126         int is_mpeg_ts = !strcasecmp(ext, ".ts");
 127         int is_mp3 = !strcasecmp(ext, ".mp3"); /* force mp3 instead of decodebin */
 128         int is_video = is_mpeg_ps || is_mpeg_ts;
 129         int is_streaming = !strncmp(filename, "http://", 7);
 130
 131         eDebug("filename: %s, is_mpeg_ps: %d, is_mpeg_ts: %d, is_video: %d, is_streaming: %d, is_mp3: %d", filename, is_mpeg_ps, is_mpeg_ts, is_video, is_streaming, is_mp3);
 132
 133         int is_audio = !is_video;
 134
 135         int all_ok = 0;
 136
 137         m_gst_pipeline = gst_pipeline_new ("audio-player");
 138         if (!m_gst_pipeline)
 139                 eWarning("failed to create pipeline");
 140
 141         if (!is_streaming)
 142                 source = gst_element_factory_make ("filesrc", "file-source");
 143         else
 144         {
 145                 source = gst_element_factory_make ("neonhttpsrc", "http-source");
 146                 if (source)
 147                         g_object_set (G_OBJECT (source), "automatic-redirect", TRUE, NULL);
 148         }
 149
 150         if (!source)
 151                 eWarning("failed to create %s", is_streaming ? "neonhttpsrc" : "filesrc");
 152         else
 153                                 /* configure source */
 154                 g_object_set (G_OBJECT (source), "location", filename, NULL);
 155
 156         if (is_audio)
 157         {
 158                         /* filesrc -> decodebin -> audioconvert -> capsfilter -> alsasink */
 159                 const char *decodertype = is_mp3 ? "mad" : "decodebin";
 160
 161                 decoder = gst_element_factory_make (decodertype, "decoder");
 162                 if (!decoder)
 163                         eWarning("failed to create %s decoder", decodertype);
 164
 165                         /* mp3 decoding needs id3demux to extract ID3 data. 'decodebin' would do that internally. */
 166                 if (is_mp3)
 167                 {
 168                         filter = gst_element_factory_make ("id3demux", "filter");
 169                         if (!filter)
 170                                 eWarning("failed to create id3demux");
 171                 }
 172
 173                 conv = gst_element_factory_make ("audioconvert", "converter");
 174                 if (!conv)
 175                         eWarning("failed to create audioconvert");
 176
 177                 flt = gst_element_factory_make ("capsfilter", "flt");
 178                 if (!flt)
 179                         eWarning("failed to create capsfilter");
 180
 181                         /* for some reasons, we need to set the sample format to depth/width=16, because auto negotiation doesn't work. */
 182                         /* endianness, however, is not required to be set anymore. */
 183                 if (flt)
 184                 {
 185                         GstCaps *caps = gst_caps_new_simple("audio/x-raw-int", /* "endianness", G_TYPE_INT, 4321, */ "depth", G_TYPE_INT, 16, "width", G_TYPE_INT, 16, "channels", G_TYPE_INT, 2, (char*)0);
 186                         g_object_set (G_OBJECT (flt), "caps", caps, (char*)0);
 187                         gst_caps_unref(caps);
 188                 }
 189
 190                 sink = gst_element_factory_make ("alsasink", "alsa-output");
 191                 if (!sink)
 192                         eWarning("failed to create osssink");
 193
 194                 if (source && decoder && conv && sink)
 195                         all_ok = 1;
 196         } else /* is_video */
 197         {
 198                         /* filesrc -> mpegdemux -> | queue_audio -> dvbaudiosink
 199                                                    | queue_video -> dvbvideosink */
 200
 201                 audio = gst_element_factory_make("dvbaudiosink", "audio");
 202                 queue_audio = gst_element_factory_make("queue", "queue_audio");
 203
 204                 video = gst_element_factory_make("dvbvideosink", "video");
 205                 queue_video = gst_element_factory_make("queue", "queue_video");
 206
 207                 if (is_mpeg_ps)
 208                         mpegdemux = gst_element_factory_make("flupsdemux", "mpegdemux");
 209                 else
 210                         mpegdemux = gst_element_factory_make("flutsdemux", "mpegdemux");
 211
 212                 if (!mpegdemux)
 213                 {
 214                         eDebug("fluendo mpegdemux not available, falling back to mpegdemux\n");
 215                         mpegdemux = gst_element_factory_make("mpegdemux", "mpegdemux");
 216                 }
 217
 218                 eDebug("audio: %p, queue_audio %p, video %p, queue_video %p, mpegdemux %p", audio, queue_audio, video, queue_video, mpegdemux);
 219                 if (audio && queue_audio && video && queue_video && mpegdemux)
 220                 {
 221                         g_object_set (G_OBJECT (queue_audio), "max-size-buffers", 0, NULL);
 222                         g_object_set (G_OBJECT (queue_audio), "max-size-time", (guint64)0, NULL);
 223                         g_object_set (G_OBJECT (queue_video), "max-size-buffers", 0, NULL);
 224                         g_object_set (G_OBJECT (queue_video), "max-size-time", (guint64)0, NULL);
 225                         all_ok = 1;
 226                 }
 227         }
 228
 229         if (m_gst_pipeline && all_ok)
 230         {
 231                 gst_bus_set_sync_handler(gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline)), gstBusSyncHandler, this);
 232
 233                 if (is_audio)
 234                 {
 235                         if (!is_mp3)
 236                         {
 237                                         /* decodebin has dynamic pads. When they get created, we connect them to the audio bin */
 238                                 g_signal_connect (decoder, "new-decoded-pad", G_CALLBACK(gstCBnewPad), this);
 239                                 g_signal_connect (decoder, "unknown-type", G_CALLBACK(gstCBunknownType), this);
 240                         }
 241
 242                                 /* gst_bin will take the 'floating references' */
 243                         gst_bin_add_many (GST_BIN (m_gst_pipeline),
 244                                                 source, decoder, NULL);
 245
 246                         if (filter)
 247                         {
 248                                         /* id3demux also has dynamic pads, which need to be connected to the decoder (this is done in the 'gstCBfilterPadAdded' CB) */
 249                                 gst_bin_add(GST_BIN(m_gst_pipeline), filter);
 250                                 gst_element_link(source, filter);
 251                                 m_decoder = decoder;
 252                                 g_signal_connect (filter, "pad-added", G_CALLBACK(gstCBfilterPadAdded), this);
 253                         } else
 254                                         /* in decodebin's case we can just connect the source with the decodebin, and decodebin will take care about id3demux (or whatever is required) */
 255                                 gst_element_link(source, decoder);
 256
 257                                 /* create audio bin with the audioconverter, the capsfilter and the audiosink */
 258                         m_gst_audio = gst_bin_new ("audiobin");
 259
 260                         GstPad *audiopad = gst_element_get_pad (conv, "sink");
 261                         gst_bin_add_many(GST_BIN(m_gst_audio), conv, flt, sink, (char*)0);
 262                         gst_element_link_many(conv, flt, sink, (char*)0);
 263                         gst_element_add_pad(m_gst_audio, gst_ghost_pad_new ("sink", audiopad));
 264                         gst_object_unref(audiopad);
 265                         gst_bin_add (GST_BIN(m_gst_pipeline), m_gst_audio);
 266
 267                                 /* in mad's case, we can directly connect the decoder to the audiobin. otherwise, we do this in gstCBnewPad */
 268                         if (is_mp3)
 269                                 gst_element_link(decoder, m_gst_audio);
 270                 } else
 271                 {
 272                         gst_bin_add_many(GST_BIN(m_gst_pipeline), source, mpegdemux, audio, queue_audio, video, queue_video, NULL);
 273                         gst_element_link(source, mpegdemux);
 274                         gst_element_link(queue_audio, audio);
 275                         gst_element_link(queue_video, video);
 276
 277                         m_gst_audioqueue = queue_audio;
 278                         m_gst_videoqueue = queue_video;
 279
 280                         g_signal_connect(mpegdemux, "pad-added", G_CALLBACK (gstCBpadAdded), this);
 281                 }
 282         } else
 283         {
 284                 if (m_gst_pipeline)
 285                         gst_object_unref(GST_OBJECT(m_gst_pipeline));
 286                 if (source)
 287                         gst_object_unref(GST_OBJECT(source));
 288                 if (decoder)
 289                         gst_object_unref(GST_OBJECT(decoder));
 290                 if (conv)
 291                         gst_object_unref(GST_OBJECT(conv));
 292                 if (sink)
 293                         gst_object_unref(GST_OBJECT(sink));
 294
 295                 if (audio)
 296                         gst_object_unref(GST_OBJECT(audio));
 297                 if (queue_audio)
 298                         gst_object_unref(GST_OBJECT(queue_audio));
 299                 if (video)
 300                         gst_object_unref(GST_OBJECT(video));
 301                 if (queue_video)
 302                         gst_object_unref(GST_OBJECT(queue_video));
 303                 if (mpegdemux)
 304                         gst_object_unref(GST_OBJECT(mpegdemux));
 305
 306                 eDebug("sorry, can't play.");
 307                 m_gst_pipeline = 0;
 308         }
 309
 310         gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 311 }
 312
 313 eServiceMP3::~eServiceMP3()
 314 {
 315         if (m_state == stRunning)
 316                 stop();
 317
 318         if (m_stream_tags)
 319                 gst_tag_list_free(m_stream_tags);
 320
 321         if (m_gst_pipeline)
 322         {
 323                 gst_object_unref (GST_OBJECT (m_gst_pipeline));
 324                 eDebug("SERVICEMP3 destruct!");
 325         }
 326 }
 327
 328 DEFINE_REF(eServiceMP3);
 329
 330 RESULT eServiceMP3::connectEvent(const Slot2<void,iPlayableService*,int> &event, ePtr<eConnection> &connection)
 331 {
 332         connection = new eConnection((iPlayableService*)this, m_event.connect(event));
 333         return 0;
 334 }
 335
 336 RESULT eServiceMP3::start()
 337 {
 338         assert(m_state == stIdle);
 339
 340         m_state = stRunning;
 341         if (m_gst_pipeline)
 342         {
 343                 eDebug("starting pipeline");
 344                 gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 345         }
 346         m_event(this, evStart);
 347         return 0;
 348 }
 349
 350 RESULT eServiceMP3::stop()
 351 {
 352         assert(m_state != stIdle);
 353         if (m_state == stStopped)
 354                 return -1;
 355         printf("MP3: %s stop\n", m_filename.c_str());
 356         gst_element_set_state(m_gst_pipeline, GST_STATE_NULL);
 357         m_state = stStopped;
 358         return 0;
 359 }
 360
 361 RESULT eServiceMP3::setTarget(int target)
 362 {
 363         return -1;
 364 }
 365
 366 RESULT eServiceMP3::pause(ePtr<iPauseableService> &ptr)
 367 {
 368         ptr=this;
 369         return 0;
 370 }
 371
 372 RESULT eServiceMP3::setSlowMotion(int ratio)
 373 {
 374         return -1;
 375 }
 376
 377 RESULT eServiceMP3::setFastForward(int ratio)
 378 {
 379         return -1;
 380 }
 381
 382                 // iPausableService
 383 RESULT eServiceMP3::pause()
 384 {
 385         if (!m_gst_pipeline)
 386                 return -1;
 387         gst_element_set_state(m_gst_pipeline, GST_STATE_PAUSED);
 388         return 0;
 389 }
 390
 391 RESULT eServiceMP3::unpause()
 392 {
 393         if (!m_gst_pipeline)
 394                 return -1;
 395         gst_element_set_state(m_gst_pipeline, GST_STATE_PLAYING);
 396         return 0;
 397 }
 398
 399         /* iSeekableService */
 400 RESULT eServiceMP3::seek(ePtr<iSeekableService> &ptr)
 401 {
 402         ptr = this;
 403         return 0;
 404 }
 405
 406 RESULT eServiceMP3::getLength(pts_t &pts)
 407 {
 408         if (!m_gst_pipeline)
 409                 return -1;
 410         if (m_state != stRunning)
 411                 return -1;
 412
 413         GstFormat fmt = GST_FORMAT_TIME;
 414         gint64 len;
 415
 416         if (!gst_element_query_duration(m_gst_pipeline, &fmt, &len))
 417                 return -1;
 418
 419                 /* len is in nanoseconds. we have 90 000 pts per second. */
 420
 421         pts = len / 11111;
 422         return 0;
 423 }
 424
 425 RESULT eServiceMP3::seekTo(pts_t to)
 426 {
 427         if (!m_gst_pipeline)
 428                 return -1;
 429
 430                 /* convert pts to nanoseconds */
 431         gint64 time_nanoseconds = to * 11111LL;
 432         if (!gst_element_seek (m_gst_pipeline, 1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
 433                 GST_SEEK_TYPE_SET, time_nanoseconds,
 434                 GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE))
 435         {
 436                 eDebug("SEEK failed");
 437                 return -1;
 438         }
 439         return 0;
 440 }
 441
 442 RESULT eServiceMP3::seekRelative(int direction, pts_t to)
 443 {
 444         if (!m_gst_pipeline)
 445                 return -1;
 446
 447         pause();
 448
 449         pts_t ppos;
 450         getPlayPosition(ppos);
 451         ppos += to * direction;
 452         if (ppos < 0)
 453                 ppos = 0;
 454         seekTo(ppos);
 455
 456         unpause();
 457
 458         return 0;
 459 }
 460
 461 RESULT eServiceMP3::getPlayPosition(pts_t &pts)
 462 {
 463         if (!m_gst_pipeline)
 464                 return -1;
 465         if (m_state != stRunning)
 466                 return -1;
 467
 468         GstFormat fmt = GST_FORMAT_TIME;
 469         gint64 len;
 470
 471         if (!gst_element_query_position(m_gst_pipeline, &fmt, &len))
 472                 return -1;
 473
 474                 /* len is in nanoseconds. we have 90 000 pts per second. */
 475         pts = len / 11111;
 476         return 0;
 477 }
 478
 479 RESULT eServiceMP3::setTrickmode(int trick)
 480 {
 481                 /* trickmode currently doesn't make any sense for us. */
 482         return -1;
 483 }
 484
 485 RESULT eServiceMP3::isCurrentlySeekable()
 486 {
 487         return 1;
 488 }
 489
 490 RESULT eServiceMP3::info(ePtr<iServiceInformation>&i)
 491 {
 492         i = this;
 493         return 0;
 494 }
 495
 496 RESULT eServiceMP3::getName(std::string &name)
 497 {
 498         name = m_filename;
 499         size_t n = name.rfind('/');
 500         if (n != std::string::npos)
 501                 name = name.substr(n + 1);
 502         return 0;
 503 }
 504
 505 int eServiceMP3::getInfo(int w)
 506 {
 507         switch (w)
 508         {
 509         case sTitle:
 510         case sArtist:
 511         case sAlbum:
 512         case sComment:
 513         case sTracknumber:
 514         case sGenre:
 515                 return resIsString;
 516
 517         default:
 518                 return resNA;
 519         }
 520 }
 521
 522 std::string eServiceMP3::getInfoString(int w)
 523 {
 524         gchar *tag = 0;
 525         switch (w)
 526         {
 527         case sTitle:
 528                 tag = GST_TAG_TITLE;
 529                 break;
 530         case sArtist:
 531                 tag = GST_TAG_ARTIST;
 532                 break;
 533         case sAlbum:
 534                 tag = GST_TAG_ALBUM;
 535                 break;
 536         case sComment:
 537                 tag = GST_TAG_COMMENT;
 538                 break;
 539         case sTracknumber:
 540                 tag = GST_TAG_TRACK_NUMBER;
 541                 break;
 542         case sGenre:
 543                 tag = GST_TAG_GENRE;
 544                 break;
 545         default:
 546                 return "";
 547         }
 548
 549         if (!m_stream_tags || !tag)
 550                 return "";
 551
 552         gchar *value;
 553
 554         if (gst_tag_list_get_string(m_stream_tags, tag, &value))
 555         {
 556                 std::string res = value;
 557                 g_free(value);
 558                 return res;
 559         }
 560
 561         return "";
 562 }
 563
 564
 565                 void foreach(const GstTagList *list, const gchar *tag, gpointer user_data)
 566                 {
 567                         if (tag)
 568                                 eDebug("Tag: %c%c%c%c", tag[0], tag[1], tag[2], tag[3]);
 569
 570                 }
 571
 572 void eServiceMP3::gstBusCall(GstBus *bus, GstMessage *msg)
 573 {
 574         if (msg)
 575         {
 576                 gchar *string = gst_structure_to_string(gst_message_get_structure(msg));
 577                 eDebug("gst_message: %s", string);
 578                 g_free(string);
 579         }
 580
 581         switch (GST_MESSAGE_TYPE (msg))
 582         {
 583         case GST_MESSAGE_EOS:
 584                 m_event((iPlayableService*)this, evEOF);
 585                 break;
 586         case GST_MESSAGE_ERROR:
 587         {
 588                 gchar *debug;
 589                 GError *err;
 590                 gst_message_parse_error (msg, &err, &debug);
 591                 g_free (debug);
 592                 eWarning("Gstreamer error: %s", err->message);
 593                 g_error_free(err);
 594                         /* TODO: signal error condition to user */
 595                 break;
 596         }
 597         case GST_MESSAGE_TAG:
 598         {
 599                 GstTagList *tags, *result;
 600                 gst_message_parse_tag(msg, &tags);
 601
 602                 result = gst_tag_list_merge(m_stream_tags, tags, GST_TAG_MERGE_PREPEND);
 603                 if (result)
 604                 {
 605                         if (m_stream_tags)
 606                                 gst_tag_list_free(m_stream_tags);
 607                         m_stream_tags = result;
 608                 }
 609                 gst_tag_list_free(tags);
 610
 611                 m_event((iPlayableService*)this, evUpdatedInfo);
 612                 break;
 613         }
 614         default:
 615                 break;
 616         }
 617 }
 618
 619 GstBusSyncReply eServiceMP3::gstBusSyncHandler(GstBus *bus, GstMessage *message, gpointer user_data)
 620 {
 621         eServiceMP3 *_this = (eServiceMP3*)user_data;
 622         _this->m_pump.send(1);
 623                 /* wake */
 624         return GST_BUS_PASS;
 625 }
 626
 627 void eServiceMP3::gstCBpadAdded(GstElement *decodebin, GstPad *pad, gpointer user_data)
 628 {
 629         eServiceMP3 *_this = (eServiceMP3*)user_data;
 630
 631         gchar *name;
 632         name = gst_pad_get_name (pad);
 633         g_print ("A new pad %s was created\n", name);
 634         if (!strncmp(name, "audio_", 6)) // mpegdemux uses video_nn with n=0,1,.., flupsdemux uses stream id
 635                 gst_pad_link(pad, gst_element_get_pad (_this->m_gst_audioqueue, "sink"));
 636         if (!strncmp(name, "video_", 6))
 637                 gst_pad_link(pad, gst_element_get_pad (_this->m_gst_videoqueue, "sink"));
 638         g_free (name);
 639
 640 }
 641
 642 void eServiceMP3::gstCBfilterPadAdded(GstElement *filter, GstPad *pad, gpointer user_data)
 643 {
 644         eServiceMP3 *_this = (eServiceMP3*)user_data;
 645         gst_pad_link(pad, gst_element_get_pad (_this->m_decoder, "sink"));
 646 }
 647
 648 void eServiceMP3::gstCBnewPad(GstElement *decodebin, GstPad *pad, gboolean last, gpointer user_data)
 649 {
 650         eServiceMP3 *_this = (eServiceMP3*)user_data;
 651         GstCaps *caps;
 652         GstStructure *str;
 653         GstPad *audiopad;
 654
 655         /* only link once */
 656         audiopad = gst_element_get_pad (_this->m_gst_audio, "sink");
 657         if (GST_PAD_IS_LINKED (audiopad)) {
 658                 eDebug("audio already linked!");
 659                 g_object_unref (audiopad);
 660                 return;
 661         }
 662
 663         /* check media type */
 664         caps = gst_pad_get_caps (pad);
 665         str = gst_caps_get_structure (caps, 0);
 666         eDebug("gst new pad! %s", gst_structure_get_name (str));
 667
 668         if (!g_strrstr (gst_structure_get_name (str), "audio")) {
 669                 gst_caps_unref (caps);
 670                 gst_object_unref (audiopad);
 671                 return;
 672         }
 673
 674         gst_caps_unref (caps);
 675         gst_pad_link (pad, audiopad);
 676 }
 677
 678 void eServiceMP3::gstCBunknownType(GstElement *decodebin, GstPad *pad, GstCaps *caps, gpointer user_data)
 679 {
 680         eServiceMP3 *_this = (eServiceMP3*)user_data;
 681         GstStructure *str;
 682
 683         /* check media type */
 684         caps = gst_pad_get_caps (pad);
 685         str = gst_caps_get_structure (caps, 0);
 686         eDebug("unknown type: %s - this can't be decoded.", gst_structure_get_name (str));
 687         gst_caps_unref (caps);
 688 }
 689
 690 void eServiceMP3::gstPoll(const int&)
 691 {
 692                 /* ok, we have a serious problem here. gstBusSyncHandler sends
 693                    us the wakup signal, but likely before it was posted.
 694                    the usleep, an EVIL HACK (DON'T DO THAT!!!) works around this.
 695
 696                    I need to understand the API a bit more to make this work
 697                    proplerly. */
 698         usleep(1);
 699
 700         GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline));
 701         GstMessage *message;
 702         while ((message = gst_bus_pop (bus)))
 703         {
 704                 gstBusCall(bus, message);
 705                 gst_message_unref (message);
 706         }
 707 }
 708
 709 eAutoInitPtr<eServiceFactoryMP3> init_eServiceFactoryMP3(eAutoInitNumbers::service+1, "eServiceFactoryMP3");
 710 #else
 711 #warning gstreamer not available, not building media player
 712 #endif