code.vuplus.com Git - vuplus_dvbapp/blob - 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         {
  24                 std::list<std::string> extensions;
  25                 extensions.push_back("mp3");
  26                 extensions.push_back("ogg");
  27                 extensions.push_back("mpg");
  28                 extensions.push_back("vob");
  29                 extensions.push_back("wav");
  30                 extensions.push_back("wave");
  31                 sc->addServiceFactory(eServiceFactoryMP3::id, this, extensions);
  32         }
  33
  34         m_service_info = new eStaticServiceMP3Info();
  35 }
  36
  37 eServiceFactoryMP3::~eServiceFactoryMP3()
  38 {
  39         ePtr<eServiceCenter> sc;
  40
  41         eServiceCenter::getPrivInstance(sc);
  42         if (sc)
  43                 sc->removeServiceFactory(eServiceFactoryMP3::id);
  44 }
  45
  46 DEFINE_REF(eServiceFactoryMP3)
  47
  48         // iServiceHandler
  49 RESULT eServiceFactoryMP3::play(const eServiceReference &ref, ePtr<iPlayableService> &ptr)
  50 {
  51                 // check resources...
  52         ptr = new eServiceMP3(ref.path.c_str());
  53         return 0;
  54 }
  55
  56 RESULT eServiceFactoryMP3::record(const eServiceReference &ref, ePtr<iRecordableService> &ptr)
  57 {
  58         ptr=0;
  59         return -1;
  60 }
  61
  62 RESULT eServiceFactoryMP3::list(const eServiceReference &, ePtr<iListableService> &ptr)
  63 {
  64         ptr=0;
  65         return -1;
  66 }
  67
  68 RESULT eServiceFactoryMP3::info(const eServiceReference &ref, ePtr<iStaticServiceInformation> &ptr)
  69 {
  70         ptr = m_service_info;
  71         return 0;
  72 }
  73
  74 RESULT eServiceFactoryMP3::offlineOperations(const eServiceReference &, ePtr<iServiceOfflineOperations> &ptr)
  75 {
  76         ptr = 0;
  77         return -1;
  78 }
  79
  80
  81 // eStaticServiceMP3Info
  82
  83
  84 // eStaticServiceMP3Info is seperated from eServiceMP3 to give information
  85 // about unopened files.
  86
  87 // probably eServiceMP3 should use this class as well, and eStaticServiceMP3Info
  88 // should have a database backend where ID3-files etc. are cached.
  89 // this would allow listing the mp3 database based on certain filters.
  90
  91 DEFINE_REF(eStaticServiceMP3Info)
  92
  93 eStaticServiceMP3Info::eStaticServiceMP3Info()
  94 {
  95 }
  96
  97 RESULT eStaticServiceMP3Info::getName(const eServiceReference &ref, std::string &name)
  98 {
  99         size_t last = ref.path.rfind('/');
 100         if (last != std::string::npos)
 101                 name = ref.path.substr(last+1);
 102         else
 103                 name = ref.path;
 104         return 0;
 105 }
 106
 107 int eStaticServiceMP3Info::getLength(const eServiceReference &ref)
 108 {
 109         return -1;
 110 }
 111
 112 // eServiceMP3
 113
 114 eServiceMP3::eServiceMP3(const char *filename): m_filename(filename), m_pump(eApp, 1)
 115 {
 116         m_stream_tags = 0;
 117         CONNECT(m_pump.recv_msg, eServiceMP3::gstPoll);
 118         GstElement *source = 0;
 119
 120         GstElement *filter = 0, *decoder = 0, *conv = 0, *flt = 0, *sink = 0; /* for audio */
 121
 122         GstElement *audio = 0, *queue_audio = 0, *video = 0, *queue_video = 0, *mpegdemux = 0;
 123
 124         m_state = stIdle;
 125         eDebug("SERVICEMP3 construct!");
 126
 127                 /* FIXME: currently, decodebin isn't possible for
 128                    video streams. in that case, make a manual pipeline. */
 129
 130         const char *ext = strrchr(filename, '.');
 131         if (!ext)
 132                 ext = filename;
 133
 134         int is_mpeg_ps = !(strcasecmp(ext, ".mpeg") && strcasecmp(ext, ".mpg") && strcasecmp(ext, ".vob") && strcasecmp(ext, ".bin"));
 135         int is_mpeg_ts = !strcasecmp(ext, ".ts");
 136         int is_mp3 = !strcasecmp(ext, ".mp3"); /* force mp3 instead of decodebin */
 137         int is_video = is_mpeg_ps || is_mpeg_ts;
 138         int is_streaming = !strncmp(filename, "http://", 7);
 139
 140         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);
 141
 142         int is_audio = !is_video;
 143
 144         int all_ok = 0;
 145
 146         m_gst_pipeline = gst_pipeline_new ("audio-player");
 147         if (!m_gst_pipeline)
 148                 eWarning("failed to create pipeline");
 149
 150         if (!is_streaming)
 151                 source = gst_element_factory_make ("filesrc", "file-source");
 152         else
 153         {
 154                 source = gst_element_factory_make ("neonhttpsrc", "http-source");
 155                 if (source)
 156                         g_object_set (G_OBJECT (source), "automatic-redirect", TRUE, NULL);
 157         }
 158
 159         if (!source)
 160                 eWarning("failed to create %s", is_streaming ? "neonhttpsrc" : "filesrc");
 161         else
 162                                 /* configure source */
 163                 g_object_set (G_OBJECT (source), "location", filename, NULL);
 164
 165         if (is_audio)
 166         {
 167                         /* filesrc -> decodebin -> audioconvert -> capsfilter -> alsasink */
 168                 const char *decodertype = is_mp3 ? "mad" : "decodebin";
 169
 170                 decoder = gst_element_factory_make (decodertype, "decoder");
 171                 if (!decoder)
 172                         eWarning("failed to create %s decoder", decodertype);
 173
 174                         /* mp3 decoding needs id3demux to extract ID3 data. 'decodebin' would do that internally. */
 175                 if (is_mp3)
 176                 {
 177                         filter = gst_element_factory_make ("id3demux", "filter");
 178                         if (!filter)
 179                                 eWarning("failed to create id3demux");
 180                 }
 181
 182                 conv = gst_element_factory_make ("audioconvert", "converter");
 183                 if (!conv)
 184                         eWarning("failed to create audioconvert");
 185
 186                 flt = gst_element_factory_make ("capsfilter", "flt");
 187                 if (!flt)
 188                         eWarning("failed to create capsfilter");
 189
 190                         /* for some reasons, we need to set the sample format to depth/width=16, because auto negotiation doesn't work. */
 191                         /* endianness, however, is not required to be set anymore. */
 192                 if (flt)
 193                 {
 194                         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);
 195                         g_object_set (G_OBJECT (flt), "caps", caps, (char*)0);
 196                         gst_caps_unref(caps);
 197                 }
 198
 199                 sink = gst_element_factory_make ("alsasink", "alsa-output");
 200                 if (!sink)
 201                         eWarning("failed to create osssink");
 202
 203                 if (source && decoder && conv && sink)
 204                         all_ok = 1;
 205         } else /* is_video */
 206         {
 207                         /* filesrc -> mpegdemux -> | queue_audio -> dvbaudiosink
 208                                                    | queue_video -> dvbvideosink */
 209
 210                 audio = gst_element_factory_make("dvbaudiosink", "audio");
 211                 queue_audio = gst_element_factory_make("queue", "queue_audio");
 212
 213                 video = gst_element_factory_make("dvbvideosink", "video");
 214                 queue_video = gst_element_factory_make("queue", "queue_video");
 215
 216                 if (is_mpeg_ps)
 217                         mpegdemux = gst_element_factory_make("flupsdemux", "mpegdemux");
 218                 else
 219                         mpegdemux = gst_element_factory_make("flutsdemux", "mpegdemux");
 220
 221                 if (!mpegdemux)
 222                 {
 223                         eDebug("fluendo mpegdemux not available, falling back to mpegdemux\n");
 224                         mpegdemux = gst_element_factory_make("mpegdemux", "mpegdemux");
 225                 }
 226
 227                 eDebug("audio: %p, queue_audio %p, video %p, queue_video %p, mpegdemux %p", audio, queue_audio, video, queue_video, mpegdemux);
 228                 if (audio && queue_audio && video && queue_video && mpegdemux)
 229                 {
 230                         g_object_set (G_OBJECT (queue_audio), "max-size-bytes", 256*1024, NULL);
 231                         g_object_set (G_OBJECT (queue_audio), "max-size-buffers", 0, NULL);
 232                         g_object_set (G_OBJECT (queue_audio), "max-size-time", (guint64)0, NULL);
 233                         g_object_set (G_OBJECT (queue_video), "max-size-buffers", 0, NULL);
 234                         g_object_set (G_OBJECT (queue_video), "max-size-bytes", 2*1024*1024, NULL);
 235                         g_object_set (G_OBJECT (queue_video), "max-size-time", (guint64)0, NULL);
 236                         all_ok = 1;
 237                 }
 238         }
 239
 240         if (m_gst_pipeline && all_ok)
 241         {
 242                 gst_bus_set_sync_handler(gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline)), gstBusSyncHandler, this);
 243
 244                 if (is_audio)
 245                 {
 246                         if (!is_mp3)
 247                         {
 248                                         /* decodebin has dynamic pads. When they get created, we connect them to the audio bin */
 249                                 g_signal_connect (decoder, "new-decoded-pad", G_CALLBACK(gstCBnewPad), this);
 250                                 g_signal_connect (decoder, "unknown-type", G_CALLBACK(gstCBunknownType), this);
 251                         }
 252
 253                                 /* gst_bin will take the 'floating references' */
 254                         gst_bin_add_many (GST_BIN (m_gst_pipeline),
 255                                                 source, decoder, NULL);
 256
 257                         if (filter)
 258                         {
 259                                         /* id3demux also has dynamic pads, which need to be connected to the decoder (this is done in the 'gstCBfilterPadAdded' CB) */
 260                                 gst_bin_add(GST_BIN(m_gst_pipeline), filter);
 261                                 gst_element_link(source, filter);
 262                                 m_decoder = decoder;
 263                                 g_signal_connect (filter, "pad-added", G_CALLBACK(gstCBfilterPadAdded), this);
 264                         } else
 265                                         /* in decodebin's case we can just connect the source with the decodebin, and decodebin will take care about id3demux (or whatever is required) */
 266                                 gst_element_link(source, decoder);
 267
 268                                 /* create audio bin with the audioconverter, the capsfilter and the audiosink */
 269                         m_gst_audio = gst_bin_new ("audiobin");
 270
 271                         GstPad *audiopad = gst_element_get_pad (conv, "sink");
 272                         gst_bin_add_many(GST_BIN(m_gst_audio), conv, flt, sink, (char*)0);
 273                         gst_element_link_many(conv, flt, sink, (char*)0);
 274                         gst_element_add_pad(m_gst_audio, gst_ghost_pad_new ("sink", audiopad));
 275                         gst_object_unref(audiopad);
 276                         gst_bin_add (GST_BIN(m_gst_pipeline), m_gst_audio);
 277
 278                                 /* in mad's case, we can directly connect the decoder to the audiobin. otherwise, we do this in gstCBnewPad */
 279                         if (is_mp3)
 280                                 gst_element_link(decoder, m_gst_audio);
 281                 } else
 282                 {
 283                         gst_bin_add_many(GST_BIN(m_gst_pipeline), source, mpegdemux, audio, queue_audio, video, queue_video, NULL);
 284                         gst_element_link(source, mpegdemux);
 285                         gst_element_link(queue_audio, audio);
 286                         gst_element_link(queue_video, video);
 287
 288                         m_gst_audioqueue = queue_audio;
 289                         m_gst_videoqueue = queue_video;
 290
 291                         g_signal_connect(mpegdemux, "pad-added", G_CALLBACK (gstCBpadAdded), this);
 292                 }
 293         } else
 294         {
 295                 if (m_gst_pipeline)
 296                         gst_object_unref(GST_OBJECT(m_gst_pipeline));
 297                 if (source)
 298                         gst_object_unref(GST_OBJECT(source));
 299                 if (decoder)
 300                         gst_object_unref(GST_OBJECT(decoder));
 301                 if (conv)
 302                         gst_object_unref(GST_OBJECT(conv));
 303                 if (sink)
 304                         gst_object_unref(GST_OBJECT(sink));
 305
 306                 if (audio)
 307                         gst_object_unref(GST_OBJECT(audio));
 308                 if (queue_audio)
 309                         gst_object_unref(GST_OBJECT(queue_audio));
 310                 if (video)
 311                         gst_object_unref(GST_OBJECT(video));
 312                 if (queue_video)
 313                         gst_object_unref(GST_OBJECT(queue_video));
 314                 if (mpegdemux)
 315                         gst_object_unref(GST_OBJECT(mpegdemux));
 316
 317                 eDebug("sorry, can't play.");
 318                 m_gst_pipeline = 0;
 319         }
 320
 321         gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 322 }
 323
 324 eServiceMP3::~eServiceMP3()
 325 {
 326         if (m_state == stRunning)
 327                 stop();
 328
 329         if (m_stream_tags)
 330                 gst_tag_list_free(m_stream_tags);
 331
 332         if (m_gst_pipeline)
 333         {
 334                 gst_object_unref (GST_OBJECT (m_gst_pipeline));
 335                 eDebug("SERVICEMP3 destruct!");
 336         }
 337 }
 338
 339 DEFINE_REF(eServiceMP3);
 340
 341 RESULT eServiceMP3::connectEvent(const Slot2<void,iPlayableService*,int> &event, ePtr<eConnection> &connection)
 342 {
 343         connection = new eConnection((iPlayableService*)this, m_event.connect(event));
 344         return 0;
 345 }
 346
 347 RESULT eServiceMP3::start()
 348 {
 349         assert(m_state == stIdle);
 350
 351         m_state = stRunning;
 352         if (m_gst_pipeline)
 353         {
 354                 eDebug("starting pipeline");
 355                 gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 356         }
 357         m_event(this, evStart);
 358         return 0;
 359 }
 360
 361 RESULT eServiceMP3::stop()
 362 {
 363         assert(m_state != stIdle);
 364         if (m_state == stStopped)
 365                 return -1;
 366         printf("MP3: %s stop\n", m_filename.c_str());
 367         gst_element_set_state(m_gst_pipeline, GST_STATE_NULL);
 368         m_state = stStopped;
 369         return 0;
 370 }
 371
 372 RESULT eServiceMP3::setTarget(int target)
 373 {
 374         return -1;
 375 }
 376
 377 RESULT eServiceMP3::pause(ePtr<iPauseableService> &ptr)
 378 {
 379         ptr=this;
 380         return 0;
 381 }
 382
 383 RESULT eServiceMP3::setSlowMotion(int ratio)
 384 {
 385         return -1;
 386 }
 387
 388 RESULT eServiceMP3::setFastForward(int ratio)
 389 {
 390         return -1;
 391 }
 392
 393                 // iPausableService
 394 RESULT eServiceMP3::pause()
 395 {
 396         if (!m_gst_pipeline)
 397                 return -1;
 398         gst_element_set_state(m_gst_pipeline, GST_STATE_PAUSED);
 399         return 0;
 400 }
 401
 402 RESULT eServiceMP3::unpause()
 403 {
 404         if (!m_gst_pipeline)
 405                 return -1;
 406         gst_element_set_state(m_gst_pipeline, GST_STATE_PLAYING);
 407         return 0;
 408 }
 409
 410         /* iSeekableService */
 411 RESULT eServiceMP3::seek(ePtr<iSeekableService> &ptr)
 412 {
 413         ptr = this;
 414         return 0;
 415 }
 416
 417 RESULT eServiceMP3::getLength(pts_t &pts)
 418 {
 419         if (!m_gst_pipeline)
 420                 return -1;
 421         if (m_state != stRunning)
 422                 return -1;
 423
 424         GstFormat fmt = GST_FORMAT_TIME;
 425         gint64 len;
 426
 427         if (!gst_element_query_duration(m_gst_pipeline, &fmt, &len))
 428                 return -1;
 429
 430                 /* len is in nanoseconds. we have 90 000 pts per second. */
 431
 432         pts = len / 11111;
 433         return 0;
 434 }
 435
 436 RESULT eServiceMP3::seekTo(pts_t to)
 437 {
 438         if (!m_gst_pipeline)
 439                 return -1;
 440
 441                 /* convert pts to nanoseconds */
 442         gint64 time_nanoseconds = to * 11111LL;
 443         if (!gst_element_seek (m_gst_pipeline, 1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
 444                 GST_SEEK_TYPE_SET, time_nanoseconds,
 445                 GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE))
 446         {
 447                 eDebug("SEEK failed");
 448                 return -1;
 449         }
 450         return 0;
 451 }
 452
 453 RESULT eServiceMP3::seekRelative(int direction, pts_t to)
 454 {
 455         if (!m_gst_pipeline)
 456                 return -1;
 457
 458         pause();
 459
 460         pts_t ppos;
 461         getPlayPosition(ppos);
 462         ppos += to * direction;
 463         if (ppos < 0)
 464                 ppos = 0;
 465         seekTo(ppos);
 466
 467         unpause();
 468
 469         return 0;
 470 }
 471
 472 RESULT eServiceMP3::getPlayPosition(pts_t &pts)
 473 {
 474         if (!m_gst_pipeline)
 475                 return -1;
 476         if (m_state != stRunning)
 477                 return -1;
 478
 479         GstFormat fmt = GST_FORMAT_TIME;
 480         gint64 len;
 481
 482         if (!gst_element_query_position(m_gst_pipeline, &fmt, &len))
 483                 return -1;
 484
 485                 /* len is in nanoseconds. we have 90 000 pts per second. */
 486         pts = len / 11111;
 487         return 0;
 488 }
 489
 490 RESULT eServiceMP3::setTrickmode(int trick)
 491 {
 492                 /* trickmode currently doesn't make any sense for us. */
 493         return -1;
 494 }
 495
 496 RESULT eServiceMP3::isCurrentlySeekable()
 497 {
 498         return 1;
 499 }
 500
 501 RESULT eServiceMP3::info(ePtr<iServiceInformation>&i)
 502 {
 503         i = this;
 504         return 0;
 505 }
 506
 507 RESULT eServiceMP3::getName(std::string &name)
 508 {
 509         name = m_filename;
 510         size_t n = name.rfind('/');
 511         if (n != std::string::npos)
 512                 name = name.substr(n + 1);
 513         return 0;
 514 }
 515
 516 int eServiceMP3::getInfo(int w)
 517 {
 518         switch (w)
 519         {
 520         case sTitle:
 521         case sArtist:
 522         case sAlbum:
 523         case sComment:
 524         case sTracknumber:
 525         case sGenre:
 526                 return resIsString;
 527
 528         default:
 529                 return resNA;
 530         }
 531 }
 532
 533 std::string eServiceMP3::getInfoString(int w)
 534 {
 535         gchar *tag = 0;
 536         switch (w)
 537         {
 538         case sTitle:
 539                 tag = GST_TAG_TITLE;
 540                 break;
 541         case sArtist:
 542                 tag = GST_TAG_ARTIST;
 543                 break;
 544         case sAlbum:
 545                 tag = GST_TAG_ALBUM;
 546                 break;
 547         case sComment:
 548                 tag = GST_TAG_COMMENT;
 549                 break;
 550         case sTracknumber:
 551                 tag = GST_TAG_TRACK_NUMBER;
 552                 break;
 553         case sGenre:
 554                 tag = GST_TAG_GENRE;
 555                 break;
 556         default:
 557                 return "";
 558         }
 559
 560         if (!m_stream_tags || !tag)
 561                 return "";
 562
 563         gchar *value;
 564
 565         if (gst_tag_list_get_string(m_stream_tags, tag, &value))
 566         {
 567                 std::string res = value;
 568                 g_free(value);
 569                 return res;
 570         }
 571
 572         return "";
 573 }
 574
 575
 576                 void foreach(const GstTagList *list, const gchar *tag, gpointer user_data)
 577                 {
 578                         if (tag)
 579                                 eDebug("Tag: %c%c%c%c", tag[0], tag[1], tag[2], tag[3]);
 580
 581                 }
 582
 583 void eServiceMP3::gstBusCall(GstBus *bus, GstMessage *msg)
 584 {
 585         if (msg)
 586         {
 587                 gchar *string = gst_structure_to_string(gst_message_get_structure(msg));
 588                 eDebug("gst_message: %s", string);
 589                 g_free(string);
 590         }
 591
 592         switch (GST_MESSAGE_TYPE (msg))
 593         {
 594         case GST_MESSAGE_EOS:
 595                 m_event((iPlayableService*)this, evEOF);
 596                 break;
 597         case GST_MESSAGE_ERROR:
 598         {
 599                 gchar *debug;
 600                 GError *err;
 601                 gst_message_parse_error (msg, &err, &debug);
 602                 g_free (debug);
 603                 eWarning("Gstreamer error: %s", err->message);
 604                 g_error_free(err);
 605                         /* TODO: signal error condition to user */
 606                 break;
 607         }
 608         case GST_MESSAGE_TAG:
 609         {
 610                 GstTagList *tags, *result;
 611                 gst_message_parse_tag(msg, &tags);
 612
 613                 result = gst_tag_list_merge(m_stream_tags, tags, GST_TAG_MERGE_PREPEND);
 614                 if (result)
 615                 {
 616                         if (m_stream_tags)
 617                                 gst_tag_list_free(m_stream_tags);
 618                         m_stream_tags = result;
 619                 }
 620                 gst_tag_list_free(tags);
 621
 622                 m_event((iPlayableService*)this, evUpdatedInfo);
 623                 break;
 624         }
 625         default:
 626                 break;
 627         }
 628 }
 629
 630 GstBusSyncReply eServiceMP3::gstBusSyncHandler(GstBus *bus, GstMessage *message, gpointer user_data)
 631 {
 632         eServiceMP3 *_this = (eServiceMP3*)user_data;
 633         _this->m_pump.send(1);
 634                 /* wake */
 635         return GST_BUS_PASS;
 636 }
 637
 638 void eServiceMP3::gstCBpadAdded(GstElement *decodebin, GstPad *pad, gpointer user_data)
 639 {
 640         eServiceMP3 *_this = (eServiceMP3*)user_data;
 641
 642         gchar *name;
 643         name = gst_pad_get_name (pad);
 644         g_print ("A new pad %s was created\n", name);
 645         if (!strncmp(name, "audio_", 6)) // mpegdemux uses video_nn with n=0,1,.., flupsdemux uses stream id
 646                 gst_pad_link(pad, gst_element_get_pad (_this->m_gst_audioqueue, "sink"));
 647         if (!strncmp(name, "video_", 6))
 648                 gst_pad_link(pad, gst_element_get_pad (_this->m_gst_videoqueue, "sink"));
 649         g_free (name);
 650
 651 }
 652
 653 void eServiceMP3::gstCBfilterPadAdded(GstElement *filter, GstPad *pad, gpointer user_data)
 654 {
 655         eServiceMP3 *_this = (eServiceMP3*)user_data;
 656         gst_pad_link(pad, gst_element_get_pad (_this->m_decoder, "sink"));
 657 }
 658
 659 void eServiceMP3::gstCBnewPad(GstElement *decodebin, GstPad *pad, gboolean last, gpointer user_data)
 660 {
 661         eServiceMP3 *_this = (eServiceMP3*)user_data;
 662         GstCaps *caps;
 663         GstStructure *str;
 664         GstPad *audiopad;
 665
 666         /* only link once */
 667         audiopad = gst_element_get_pad (_this->m_gst_audio, "sink");
 668         if (GST_PAD_IS_LINKED (audiopad)) {
 669                 eDebug("audio already linked!");
 670                 g_object_unref (audiopad);
 671                 return;
 672         }
 673
 674         /* check media type */
 675         caps = gst_pad_get_caps (pad);
 676         str = gst_caps_get_structure (caps, 0);
 677         eDebug("gst new pad! %s", gst_structure_get_name (str));
 678
 679         if (!g_strrstr (gst_structure_get_name (str), "audio")) {
 680                 gst_caps_unref (caps);
 681                 gst_object_unref (audiopad);
 682                 return;
 683         }
 684
 685         gst_caps_unref (caps);
 686         gst_pad_link (pad, audiopad);
 687 }
 688
 689 void eServiceMP3::gstCBunknownType(GstElement *decodebin, GstPad *pad, GstCaps *caps, gpointer user_data)
 690 {
 691         eServiceMP3 *_this = (eServiceMP3*)user_data;
 692         GstStructure *str;
 693
 694         /* check media type */
 695         caps = gst_pad_get_caps (pad);
 696         str = gst_caps_get_structure (caps, 0);
 697         eDebug("unknown type: %s - this can't be decoded.", gst_structure_get_name (str));
 698         gst_caps_unref (caps);
 699 }
 700
 701 void eServiceMP3::gstPoll(const int&)
 702 {
 703                 /* ok, we have a serious problem here. gstBusSyncHandler sends
 704                    us the wakup signal, but likely before it was posted.
 705                    the usleep, an EVIL HACK (DON'T DO THAT!!!) works around this.
 706
 707                    I need to understand the API a bit more to make this work
 708                    proplerly. */
 709         usleep(1);
 710
 711         GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline));
 712         GstMessage *message;
 713         while ((message = gst_bus_pop (bus)))
 714         {
 715                 gstBusCall(bus, message);
 716                 gst_message_unref (message);
 717         }
 718 }
 719
 720 eAutoInitPtr<eServiceFactoryMP3> init_eServiceFactoryMP3(eAutoInitNumbers::service+1, "eServiceFactoryMP3");
 721 #else
 722 #warning gstreamer not available, not building media player
 723 #endif