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                 extensions.push_back("mkv");
  32                 extensions.push_back("avi");
  33                 sc->addServiceFactory(eServiceFactoryMP3::id, this, extensions);
  34         }
  35
  36         m_service_info = new eStaticServiceMP3Info();
  37 }
  38
  39 eServiceFactoryMP3::~eServiceFactoryMP3()
  40 {
  41         ePtr<eServiceCenter> sc;
  42
  43         eServiceCenter::getPrivInstance(sc);
  44         if (sc)
  45                 sc->removeServiceFactory(eServiceFactoryMP3::id);
  46 }
  47
  48 DEFINE_REF(eServiceFactoryMP3)
  49
  50         // iServiceHandler
  51 RESULT eServiceFactoryMP3::play(const eServiceReference &ref, ePtr<iPlayableService> &ptr)
  52 {
  53                 // check resources...
  54         ptr = new eServiceMP3(ref.path.c_str());
  55         return 0;
  56 }
  57
  58 RESULT eServiceFactoryMP3::record(const eServiceReference &ref, ePtr<iRecordableService> &ptr)
  59 {
  60         ptr=0;
  61         return -1;
  62 }
  63
  64 RESULT eServiceFactoryMP3::list(const eServiceReference &, ePtr<iListableService> &ptr)
  65 {
  66         ptr=0;
  67         return -1;
  68 }
  69
  70 RESULT eServiceFactoryMP3::info(const eServiceReference &ref, ePtr<iStaticServiceInformation> &ptr)
  71 {
  72         ptr = m_service_info;
  73         return 0;
  74 }
  75
  76 RESULT eServiceFactoryMP3::offlineOperations(const eServiceReference &, ePtr<iServiceOfflineOperations> &ptr)
  77 {
  78         ptr = 0;
  79         return -1;
  80 }
  81
  82
  83 // eStaticServiceMP3Info
  84
  85
  86 // eStaticServiceMP3Info is seperated from eServiceMP3 to give information
  87 // about unopened files.
  88
  89 // probably eServiceMP3 should use this class as well, and eStaticServiceMP3Info
  90 // should have a database backend where ID3-files etc. are cached.
  91 // this would allow listing the mp3 database based on certain filters.
  92
  93 DEFINE_REF(eStaticServiceMP3Info)
  94
  95 eStaticServiceMP3Info::eStaticServiceMP3Info()
  96 {
  97 }
  98
  99 RESULT eStaticServiceMP3Info::getName(const eServiceReference &ref, std::string &name)
 100 {
 101         size_t last = ref.path.rfind('/');
 102         if (last != std::string::npos)
 103                 name = ref.path.substr(last+1);
 104         else
 105                 name = ref.path;
 106         return 0;
 107 }
 108
 109 int eStaticServiceMP3Info::getLength(const eServiceReference &ref)
 110 {
 111         return -1;
 112 }
 113
 114 // eServiceMP3
 115
 116 eServiceMP3::eServiceMP3(const char *filename): m_filename(filename), m_pump(eApp, 1)
 117 {
 118         m_stream_tags = 0;
 119         m_audioStreams.clear();
 120         m_currentAudioStream = 0;
 121         m_currentTrickRatio = 0;
 122         CONNECT(m_seekTimeout.timeout, eServiceMP3::seekTimeoutCB);
 123         CONNECT(m_pump.recv_msg, eServiceMP3::gstPoll);
 124         GstElement *source = 0;
 125
 126         GstElement *filter = 0, *decoder = 0, *conv = 0, *flt = 0, *sink = 0; /* for audio */
 127
 128         GstElement *audio = 0, *switch_audio = 0, *queue_audio = 0, *video = 0, *queue_video = 0, *videodemux = 0;
 129
 130         m_state = stIdle;
 131         eDebug("SERVICEMP3 construct!");
 132
 133                 /* FIXME: currently, decodebin isn't possible for
 134                    video streams. in that case, make a manual pipeline. */
 135
 136         const char *ext = strrchr(filename, '.');
 137         if (!ext)
 138                 ext = filename;
 139
 140         int is_mpeg_ps = !(strcasecmp(ext, ".mpeg") && strcasecmp(ext, ".mpg") && strcasecmp(ext, ".vob") && strcasecmp(ext, ".bin"));
 141         int is_mpeg_ts = !strcasecmp(ext, ".ts");
 142         int is_matroska = !strcasecmp(ext, ".mkv");
 143         int is_avi = !strcasecmp(ext, ".avi");
 144         int is_mp3 = !strcasecmp(ext, ".mp3"); /* force mp3 instead of decodebin */
 145         int is_video = is_mpeg_ps || is_mpeg_ts || is_matroska || is_avi;
 146         int is_streaming = !strncmp(filename, "http://", 7);
 147         int is_AudioCD = !(strncmp(filename, "/autofs/", 8) || strncmp(filename+strlen(filename)-13, "/track-", 7) || strcasecmp(ext, ".wav"));
 148
 149         eDebug("filename: %s, is_mpeg_ps: %d, is_mpeg_ts: %d, is_video: %d, is_streaming: %d, is_mp3: %d, is_matroska: %d, is_avi: %d, is_AudioCD: %d", filename, is_mpeg_ps, is_mpeg_ts, is_video, is_streaming, is_mp3, is_matroska, is_avi, is_AudioCD);
 150
 151         int is_audio = !is_video;
 152
 153         int all_ok = 0;
 154
 155         m_gst_pipeline = gst_pipeline_new ("mediaplayer");
 156         if (!m_gst_pipeline)
 157                 eWarning("failed to create pipeline");
 158
 159         if (is_AudioCD)
 160         {
 161                 source = gst_element_factory_make ("cdiocddasrc", "cda-source");
 162                 if (source)
 163                         g_object_set (G_OBJECT (source), "device", "/dev/cdroms/cdrom0", NULL);
 164                 else
 165                         is_AudioCD = 0;
 166         }
 167         if ( !is_streaming && !is_AudioCD )
 168                 source = gst_element_factory_make ("filesrc", "file-source");
 169         else if ( is_streaming )
 170         {
 171                 source = gst_element_factory_make ("neonhttpsrc", "http-source");
 172                 if (source)
 173                         g_object_set (G_OBJECT (source), "automatic-redirect", TRUE, NULL);
 174         }
 175
 176         if (!source)
 177                 eWarning("failed to create %s", is_streaming ? "neonhttpsrc" : "filesrc");
 178                                 /* configure source */
 179         else if (!is_AudioCD)
 180                 g_object_set (G_OBJECT (source), "location", filename, NULL);
 181         else
 182         {
 183                 int track = atoi(filename+18);
 184                 eDebug("play audio CD track #%i",track);
 185                 if (track > 0)
 186                         g_object_set (G_OBJECT (source), "track", track, NULL);
 187         }
 188
 189         if (is_audio)
 190         {
 191                         /* filesrc -> decodebin -> audioconvert -> capsfilter -> alsasink */
 192                 const char *decodertype = is_mp3 ? "mad" : "decodebin";
 193
 194                 decoder = gst_element_factory_make (decodertype, "decoder");
 195                 if (!decoder)
 196                         eWarning("failed to create %s decoder", decodertype);
 197
 198                         /* mp3 decoding needs id3demux to extract ID3 data. 'decodebin' would do that internally. */
 199                 if (is_mp3)
 200                 {
 201                         filter = gst_element_factory_make ("id3demux", "filter");
 202                         if (!filter)
 203                                 eWarning("failed to create id3demux");
 204                 }
 205
 206                 conv = gst_element_factory_make ("audioconvert", "converter");
 207                 if (!conv)
 208                         eWarning("failed to create audioconvert");
 209
 210                 flt = gst_element_factory_make ("capsfilter", "flt");
 211                 if (!flt)
 212                         eWarning("failed to create capsfilter");
 213
 214                         /* for some reasons, we need to set the sample format to depth/width=16, because auto negotiation doesn't work. */
 215                         /* endianness, however, is not required to be set anymore. */
 216                 if (flt)
 217                 {
 218                         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);
 219                         g_object_set (G_OBJECT (flt), "caps", caps, (char*)0);
 220                         gst_caps_unref(caps);
 221                 }
 222
 223                 sink = gst_element_factory_make ("alsasink", "alsa-output");
 224                 if (!sink)
 225                         eWarning("failed to create osssink");
 226
 227                 if (source && decoder && conv && sink)
 228                         all_ok = 1;
 229         } else /* is_video */
 230         {
 231                         /* filesrc -> mpegdemux -> | queue_audio -> dvbaudiosink
 232                                                    | queue_video -> dvbvideosink */
 233
 234                 audio = gst_element_factory_make("dvbaudiosink", "audiosink");
 235                 queue_audio = gst_element_factory_make("queue", "queue_audio");
 236
 237                 video = gst_element_factory_make("dvbvideosink", "videosink");
 238                 queue_video = gst_element_factory_make("queue", "queue_video");
 239
 240                 if (is_mpeg_ps)
 241                         videodemux = gst_element_factory_make("flupsdemux", "videodemux");
 242                 else if (is_mpeg_ts)
 243                         videodemux = gst_element_factory_make("flutsdemux", "videodemux");
 244                 else if (is_matroska)
 245                         videodemux = gst_element_factory_make("matroskademux", "videodemux");
 246                 else if (is_avi)
 247                         videodemux = gst_element_factory_make("avidemux", "videodemux");
 248
 249                 if (!videodemux)
 250                 {
 251                         eDebug("fluendo mpegdemux not available, falling back to mpegdemux\n");
 252                         videodemux = gst_element_factory_make("mpegdemux", "videodemux");
 253                 }
 254
 255                 eDebug("audio: %p, queue_audio %p, video %p, queue_video %p, videodemux %p", audio, queue_audio, video, queue_video, videodemux);
 256                 if (audio && queue_audio && video && queue_video && videodemux)
 257                 {
 258                         g_object_set (G_OBJECT (queue_audio), "max-size-bytes", 256*1024, NULL);
 259                         g_object_set (G_OBJECT (queue_audio), "max-size-buffers", 0, NULL);
 260                         g_object_set (G_OBJECT (queue_audio), "max-size-time", (guint64)0, NULL);
 261                         g_object_set (G_OBJECT (queue_video), "max-size-buffers", 0, NULL);
 262                         g_object_set (G_OBJECT (queue_video), "max-size-bytes", 2*1024*1024, NULL);
 263                         g_object_set (G_OBJECT (queue_video), "max-size-time", (guint64)0, NULL);
 264                         all_ok = 1;
 265                 }
 266         }
 267
 268         if (m_gst_pipeline && all_ok)
 269         {
 270                 gst_bus_set_sync_handler(gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline)), gstBusSyncHandler, this);
 271
 272                 if (is_AudioCD)
 273                 {
 274                         queue_audio = gst_element_factory_make("queue", "queue_audio");
 275                         g_object_set (G_OBJECT (sink), "preroll-queue-len", 80, NULL);
 276                         gst_bin_add_many (GST_BIN (m_gst_pipeline), source, queue_audio, conv, sink, NULL);
 277                         gst_element_link_many(source, queue_audio, conv, sink, NULL);
 278                 }
 279                 else if (is_audio)
 280                 {
 281                         queue_audio = gst_element_factory_make("queue", "queue_audio");
 282
 283                         if (!is_mp3)
 284                         {
 285                                         /* decodebin has dynamic pads. When they get created, we connect them to the audio bin */
 286                                 g_signal_connect (decoder, "new-decoded-pad", G_CALLBACK(gstCBnewPad), this);
 287                                 g_signal_connect (decoder, "unknown-type", G_CALLBACK(gstCBunknownType), this);
 288                                 g_object_set (G_OBJECT (sink), "preroll-queue-len", 80, NULL);
 289                         }
 290
 291                                 /* gst_bin will take the 'floating references' */
 292                         gst_bin_add_many (GST_BIN (m_gst_pipeline),
 293                                                 source, queue_audio, decoder, NULL);
 294
 295                         if (filter)
 296                         {
 297                                         /* id3demux also has dynamic pads, which need to be connected to the decoder (this is done in the 'gstCBfilterPadAdded' CB) */
 298                                 gst_bin_add(GST_BIN(m_gst_pipeline), filter);
 299                                 gst_element_link(source, filter);
 300                                 g_signal_connect (filter, "pad-added", G_CALLBACK(gstCBfilterPadAdded), this);
 301                         } else
 302                                         /* in decodebin's case we can just connect the source with the decodebin, and decodebin will take care about id3demux (or whatever is required) */
 303                                 gst_element_link_many(source, queue_audio, decoder, NULL);
 304
 305                                 /* create audio bin with the audioconverter, the capsfilter and the audiosink */
 306                         audio = gst_bin_new ("audiobin");
 307
 308                         GstPad *audiopad = gst_element_get_static_pad (conv, "sink");
 309                         gst_bin_add_many(GST_BIN(audio), conv, flt, sink, (char*)0);
 310                         gst_element_link_many(conv, flt, sink, (char*)0);
 311                         gst_element_add_pad(audio, gst_ghost_pad_new ("sink", audiopad));
 312                         gst_object_unref(audiopad);
 313                         gst_bin_add (GST_BIN(m_gst_pipeline), audio);
 314                                 /* in mad's case, we can directly connect the decoder to the audiobin. otherwise, we do this in gstCBnewPad */
 315                         if (is_mp3)
 316                                 gst_element_link(decoder, audio);
 317                         audioStream audioStreamElem;
 318                         m_audioStreams.push_back(audioStreamElem);
 319                 } else /* is_video */
 320                 {
 321                         gst_bin_add_many(GST_BIN(m_gst_pipeline), source, videodemux, audio, queue_audio, video, queue_video, NULL);
 322                         switch_audio = gst_element_factory_make ("input-selector", "switch_audio");
 323                         if (switch_audio)
 324                         {
 325                                 g_object_set (G_OBJECT (switch_audio), "select-all", TRUE, NULL);
 326                                 gst_bin_add(GST_BIN(m_gst_pipeline), switch_audio);
 327                                 gst_element_link(switch_audio, queue_audio);
 328                         }
 329                         gst_element_link(source, videodemux);
 330                         gst_element_link(queue_audio, audio);
 331                         gst_element_link(queue_video, video);
 332                         g_signal_connect(videodemux, "pad-added", G_CALLBACK (gstCBpadAdded), this);
 333                 }
 334         } else
 335         {
 336                 if (m_gst_pipeline)
 337                         gst_object_unref(GST_OBJECT(m_gst_pipeline));
 338                 if (source)
 339                         gst_object_unref(GST_OBJECT(source));
 340                 if (decoder)
 341                         gst_object_unref(GST_OBJECT(decoder));
 342                 if (conv)
 343                         gst_object_unref(GST_OBJECT(conv));
 344                 if (sink)
 345                         gst_object_unref(GST_OBJECT(sink));
 346
 347                 if (audio)
 348                         gst_object_unref(GST_OBJECT(audio));
 349                 if (queue_audio)
 350                         gst_object_unref(GST_OBJECT(queue_audio));
 351                 if (video)
 352                         gst_object_unref(GST_OBJECT(video));
 353                 if (queue_video)
 354                         gst_object_unref(GST_OBJECT(queue_video));
 355                 if (videodemux)
 356                         gst_object_unref(GST_OBJECT(videodemux));
 357                 if (switch_audio)
 358                         gst_object_unref(GST_OBJECT(switch_audio));
 359
 360                 eDebug("sorry, can't play.");
 361                 m_gst_pipeline = 0;
 362         }
 363
 364         gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 365 }
 366
 367 eServiceMP3::~eServiceMP3()
 368 {
 369         if (m_state == stRunning)
 370                 stop();
 371
 372         if (m_stream_tags)
 373                 gst_tag_list_free(m_stream_tags);
 374
 375         if (m_gst_pipeline)
 376         {
 377                 gst_object_unref (GST_OBJECT (m_gst_pipeline));
 378                 eDebug("SERVICEMP3 destruct!");
 379         }
 380 }
 381
 382 DEFINE_REF(eServiceMP3);
 383
 384 RESULT eServiceMP3::connectEvent(const Slot2<void,iPlayableService*,int> &event, ePtr<eConnection> &connection)
 385 {
 386         connection = new eConnection((iPlayableService*)this, m_event.connect(event));
 387         return 0;
 388 }
 389
 390 RESULT eServiceMP3::start()
 391 {
 392         assert(m_state == stIdle);
 393
 394         m_state = stRunning;
 395         if (m_gst_pipeline)
 396         {
 397                 eDebug("starting pipeline");
 398                 gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 399         }
 400         m_event(this, evStart);
 401         return 0;
 402 }
 403
 404 RESULT eServiceMP3::stop()
 405 {
 406         assert(m_state != stIdle);
 407         if (m_state == stStopped)
 408                 return -1;
 409         eDebug("MP3: %s stop\n", m_filename.c_str());
 410         gst_element_set_state(m_gst_pipeline, GST_STATE_NULL);
 411         m_state = stStopped;
 412         return 0;
 413 }
 414
 415 RESULT eServiceMP3::setTarget(int target)
 416 {
 417         return -1;
 418 }
 419
 420 RESULT eServiceMP3::pause(ePtr<iPauseableService> &ptr)
 421 {
 422         ptr=this;
 423         return 0;
 424 }
 425
 426 RESULT eServiceMP3::setSlowMotion(int ratio)
 427 {
 428         /* we can't do slomo yet */
 429         return -1;
 430 }
 431
 432 RESULT eServiceMP3::setFastForward(int ratio)
 433 {
 434         m_currentTrickRatio = ratio;
 435         if (ratio)
 436                 m_seekTimeout.start(1000, 0);
 437         else
 438                 m_seekTimeout.stop();
 439         return 0;
 440 }
 441
 442 void eServiceMP3::seekTimeoutCB()
 443 {
 444         pts_t ppos, len;
 445         getPlayPosition(ppos);
 446         getLength(len);
 447         ppos += 90000*m_currentTrickRatio;
 448
 449         if (ppos < 0)
 450         {
 451                 ppos = 0;
 452                 m_seekTimeout.stop();
 453         }
 454         if (ppos > len)
 455         {
 456                 ppos = 0;
 457                 stop();
 458                 m_seekTimeout.stop();
 459                 return;
 460         }
 461         seekTo(ppos);
 462 }
 463
 464                 // iPausableService
 465 RESULT eServiceMP3::pause()
 466 {
 467         if (!m_gst_pipeline)
 468                 return -1;
 469         GstStateChangeReturn res = gst_element_set_state(m_gst_pipeline, GST_STATE_PAUSED);
 470         if (res == GST_STATE_CHANGE_ASYNC)
 471         {
 472                 pts_t ppos;
 473                 getPlayPosition(ppos);
 474                 seekTo(ppos);
 475         }
 476         return 0;
 477 }
 478
 479 RESULT eServiceMP3::unpause()
 480 {
 481         if (!m_gst_pipeline)
 482                 return -1;
 483
 484         GstStateChangeReturn res;
 485         res = gst_element_set_state(m_gst_pipeline, GST_STATE_PLAYING);
 486         return 0;
 487 }
 488
 489         /* iSeekableService */
 490 RESULT eServiceMP3::seek(ePtr<iSeekableService> &ptr)
 491 {
 492         ptr = this;
 493         return 0;
 494 }
 495
 496 RESULT eServiceMP3::getLength(pts_t &pts)
 497 {
 498         if (!m_gst_pipeline)
 499                 return -1;
 500         if (m_state != stRunning)
 501                 return -1;
 502
 503         GstFormat fmt = GST_FORMAT_TIME;
 504         gint64 len;
 505
 506         if (!gst_element_query_duration(m_gst_pipeline, &fmt, &len))
 507                 return -1;
 508
 509                 /* len is in nanoseconds. we have 90 000 pts per second. */
 510
 511         pts = len / 11111;
 512         return 0;
 513 }
 514
 515 RESULT eServiceMP3::seekTo(pts_t to)
 516 {
 517         if (!m_gst_pipeline)
 518                 return -1;
 519
 520                 /* convert pts to nanoseconds */
 521         gint64 time_nanoseconds = to * 11111LL;
 522         if (!gst_element_seek (m_gst_pipeline, 1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
 523                 GST_SEEK_TYPE_SET, time_nanoseconds,
 524                 GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE))
 525         {
 526                 eDebug("SEEK failed");
 527                 return -1;
 528         }
 529         return 0;
 530 }
 531
 532 RESULT eServiceMP3::seekRelative(int direction, pts_t to)
 533 {
 534         if (!m_gst_pipeline)
 535                 return -1;
 536
 537         pts_t ppos;
 538         getPlayPosition(ppos);
 539         ppos += to * direction;
 540         if (ppos < 0)
 541                 ppos = 0;
 542         seekTo(ppos);
 543
 544         return 0;
 545 }
 546
 547 RESULT eServiceMP3::getPlayPosition(pts_t &pts)
 548 {
 549         if (!m_gst_pipeline)
 550                 return -1;
 551         if (m_state != stRunning)
 552                 return -1;
 553
 554         GstFormat fmt = GST_FORMAT_TIME;
 555         gint64 len;
 556
 557         if (!gst_element_query_position(m_gst_pipeline, &fmt, &len))
 558                 return -1;
 559
 560                 /* len is in nanoseconds. we have 90 000 pts per second. */
 561         pts = len / 11111;
 562         return 0;
 563 }
 564
 565 RESULT eServiceMP3::setTrickmode(int trick)
 566 {
 567                 /* trickmode is not yet supported by our dvbmediasinks. */
 568         return -1;
 569 }
 570
 571 RESULT eServiceMP3::isCurrentlySeekable()
 572 {
 573         return 1;
 574 }
 575
 576 RESULT eServiceMP3::info(ePtr<iServiceInformation>&i)
 577 {
 578         i = this;
 579         return 0;
 580 }
 581
 582 RESULT eServiceMP3::getName(std::string &name)
 583 {
 584         name = m_filename;
 585         size_t n = name.rfind('/');
 586         if (n != std::string::npos)
 587                 name = name.substr(n + 1);
 588         return 0;
 589 }
 590
 591 int eServiceMP3::getInfo(int w)
 592 {
 593         gchar *tag = 0;
 594
 595         switch (w)
 596         {
 597         case sTitle:
 598         case sArtist:
 599         case sAlbum:
 600         case sComment:
 601         case sTracknumber:
 602         case sGenre:
 603         case sVideoType:
 604                 return resIsString;
 605         case sCurrentTitle:
 606                 tag = GST_TAG_TRACK_NUMBER;
 607                 break;
 608         case sTotalTitles:
 609                 tag = GST_TAG_TRACK_COUNT;
 610                 break;
 611         default:
 612                 return resNA;
 613         }
 614
 615         if (!m_stream_tags || !tag)
 616                 return 0;
 617
 618         guint value;
 619         if (gst_tag_list_get_uint(m_stream_tags, tag, &value))
 620                 return (int) value;
 621
 622         return 0;
 623
 624 }
 625
 626 std::string eServiceMP3::getInfoString(int w)
 627 {
 628         gchar *tag = 0;
 629         switch (w)
 630         {
 631         case sTitle:
 632                 tag = GST_TAG_TITLE;
 633                 break;
 634         case sArtist:
 635                 tag = GST_TAG_ARTIST;
 636                 break;
 637         case sAlbum:
 638                 tag = GST_TAG_ALBUM;
 639                 break;
 640         case sComment:
 641                 tag = GST_TAG_COMMENT;
 642                 break;
 643         case sTracknumber:
 644                 tag = GST_TAG_TRACK_NUMBER;
 645                 break;
 646         case sGenre:
 647                 tag = GST_TAG_GENRE;
 648                 break;
 649         case sVideoType:
 650                 tag = GST_TAG_VIDEO_CODEC;
 651                 break;
 652         default:
 653                 return "";
 654         }
 655
 656         if (!m_stream_tags || !tag)
 657                 return "";
 658
 659         gchar *value;
 660
 661         if (gst_tag_list_get_string(m_stream_tags, tag, &value))
 662         {
 663                 std::string res = value;
 664                 g_free(value);
 665                 return res;
 666         }
 667
 668         return "";
 669 }
 670
 671 RESULT eServiceMP3::audioChannel(ePtr<iAudioChannelSelection> &ptr)
 672 {
 673         ptr = this;
 674         return 0;
 675 }
 676
 677 RESULT eServiceMP3::audioTracks(ePtr<iAudioTrackSelection> &ptr)
 678 {
 679         ptr = this;
 680         return 0;
 681 }
 682
 683 int eServiceMP3::getNumberOfTracks()
 684 {
 685         return m_audioStreams.size();
 686 }
 687
 688 int eServiceMP3::getCurrentTrack()
 689 {
 690         return m_currentAudioStream;
 691 }
 692
 693 RESULT eServiceMP3::selectTrack(unsigned int i)
 694 {
 695         int ret = selectAudioStream(i);
 696         /* flush */
 697         pts_t ppos;
 698         getPlayPosition(ppos);
 699         seekTo(ppos);
 700
 701         return ret;
 702 }
 703
 704 int eServiceMP3::selectAudioStream(int i)
 705 {
 706         gint nb_sources;
 707         GstPad *active_pad;
 708         GstElement *selector = gst_bin_get_by_name(GST_BIN(m_gst_pipeline),"switch_audio");
 709         if ( !selector)
 710         {
 711                 eDebug("can't switch audio tracks! gst-plugin-selector needed");
 712                 return -1;
 713         }
 714         g_object_get (G_OBJECT (selector), "n-pads", &nb_sources, NULL);
 715         if ( i >= m_audioStreams.size() || i >= nb_sources || m_currentAudioStream >= m_audioStreams.size() )
 716                 return -2;
 717         char sinkpad[8];
 718         sprintf(sinkpad, "sink%d", i);
 719         g_object_set (G_OBJECT (selector), "active-pad", gst_element_get_pad (selector, sinkpad), NULL);
 720         g_object_get (G_OBJECT (selector), "active-pad", &active_pad, NULL);
 721         gchar *name;
 722         name = gst_pad_get_name (active_pad);
 723         eDebug ("switched audio to (%s)", name);
 724         g_free(name);
 725         m_currentAudioStream = i;
 726         return 0;
 727 }
 728
 729 int eServiceMP3::getCurrentChannel()
 730 {
 731         return STEREO;
 732 }
 733
 734 RESULT eServiceMP3::selectChannel(int i)
 735 {
 736         eDebug("eServiceMP3::selectChannel(%i)",i);
 737         return 0;
 738 }
 739
 740 RESULT eServiceMP3::getTrackInfo(struct iAudioTrackInfo &info, unsigned int i)
 741 {
 742 //      eDebug("eServiceMP3::getTrackInfo(&info, %i)",i);
 743         if (i >= m_audioStreams.size())
 744                 return -2;
 745         if (m_audioStreams[i].type == audioStream::atMP2)
 746                 info.m_description = "MP2";
 747         else if (m_audioStreams[i].type == audioStream::atMP3)
 748                 info.m_description = "MP3";
 749         else if (m_audioStreams[i].type == audioStream::atAC3)
 750                 info.m_description = "AC3";
 751         else if (m_audioStreams[i].type == audioStream::atAAC)
 752                 info.m_description = "AAC";
 753         else if (m_audioStreams[i].type == audioStream::atDTS)
 754                 info.m_description = "DTS";
 755         else if (m_audioStreams[i].type == audioStream::atPCM)
 756                 info.m_description = "PCM";
 757         else if (m_audioStreams[i].type == audioStream::atOGG)
 758                 info.m_description = "OGG";
 759         else
 760                 info.m_description = "???";
 761         if (info.m_language.empty())
 762                 info.m_language = m_audioStreams[i].language_code;
 763         return 0;
 764 }
 765
 766 void eServiceMP3::gstBusCall(GstBus *bus, GstMessage *msg)
 767 {
 768         if (!msg)
 769                 return;
 770         gchar *sourceName;
 771         GstObject *source;
 772
 773         source = GST_MESSAGE_SRC(msg);
 774         sourceName = gst_object_get_name(source);
 775
 776         if (gst_message_get_structure(msg))
 777         {
 778                 gchar *string = gst_structure_to_string(gst_message_get_structure(msg));
 779                 eDebug("gst_message from %s: %s", sourceName, string);
 780                 g_free(string);
 781         }
 782         else
 783                 eDebug("gst_message from %s: %s (without structure)", sourceName, GST_MESSAGE_TYPE_NAME(msg));
 784
 785         switch (GST_MESSAGE_TYPE (msg))
 786         {
 787         case GST_MESSAGE_EOS:
 788                 m_event((iPlayableService*)this, evEOF);
 789                 break;
 790         case GST_MESSAGE_ERROR:
 791         {
 792                 gchar *debug;
 793                 GError *err;
 794
 795                 gst_message_parse_error (msg, &err, &debug);
 796                 g_free (debug);
 797                 eWarning("Gstreamer error: %s (%i)", err->message, err->code );
 798                 if ( err->domain == GST_STREAM_ERROR && err->code == GST_STREAM_ERROR_DECODE )
 799                 {
 800                         if ( g_strrstr(sourceName, "videosink") )
 801                                 m_event((iPlayableService*)this, evUser+11);
 802                 }
 803                 g_error_free(err);
 804                         /* TODO: signal error condition to user */
 805                 break;
 806         }
 807         case GST_MESSAGE_TAG:
 808         {
 809                 GstTagList *tags, *result;
 810                 gst_message_parse_tag(msg, &tags);
 811
 812                 result = gst_tag_list_merge(m_stream_tags, tags, GST_TAG_MERGE_PREPEND);
 813                 if (result)
 814                 {
 815                         if (m_stream_tags)
 816                                 gst_tag_list_free(m_stream_tags);
 817                         m_stream_tags = result;
 818                 }
 819                 gchar *g_audiocodec;
 820                 if (gst_tag_list_get_string(tags, GST_TAG_AUDIO_CODEC, &g_audiocodec) && m_audioStreams.size())
 821                 {
 822                         std::vector<audioStream>::iterator IterAudioStream = m_audioStreams.begin();
 823                         while ( IterAudioStream->language_code.length() && IterAudioStream != m_audioStreams.end())
 824                                 IterAudioStream++;
 825                         if ( g_strrstr(g_audiocodec, "MPEG-1 layer 2") )
 826                                 IterAudioStream->type = audioStream::atMP2;
 827                         else if ( g_strrstr(g_audiocodec, "MPEG-1 layer 3") )
 828                                 IterAudioStream->type = audioStream::atMP3;
 829                         else if ( g_strrstr(g_audiocodec, "AC-3 audio") )
 830                                 IterAudioStream->type = audioStream::atAC3;
 831                         else if ( g_strrstr(g_audiocodec, "Uncompressed 16-bit PCM audio") )
 832                                 IterAudioStream->type = audioStream::atPCM;
 833                         gchar *g_language;
 834                         if ( gst_tag_list_get_string(tags, GST_TAG_LANGUAGE_CODE, &g_language) )
 835                                 IterAudioStream->language_code = std::string(g_language);
 836                         g_free (g_language);
 837                         g_free (g_audiocodec);
 838                 }
 839                 break;
 840         }
 841         default:
 842                 break;
 843         }
 844         g_free (sourceName);
 845 }
 846
 847 GstBusSyncReply eServiceMP3::gstBusSyncHandler(GstBus *bus, GstMessage *message, gpointer user_data)
 848 {
 849         eServiceMP3 *_this = (eServiceMP3*)user_data;
 850         _this->m_pump.send(1);
 851                 /* wake */
 852         return GST_BUS_PASS;
 853 }
 854
 855 void eServiceMP3::gstCBpadAdded(GstElement *decodebin, GstPad *pad, gpointer user_data)
 856 {
 857         eServiceMP3 *_this = (eServiceMP3*)user_data;
 858         GstBin *pipeline = GST_BIN(_this->m_gst_pipeline);
 859         gchar *name;
 860         name = gst_pad_get_name (pad);
 861         eDebug ("A new pad %s was created", name);
 862         if (g_strrstr(name,"audio")) // mpegdemux, matroskademux, avidemux use video_nn with n=0,1,.., flupsdemux uses stream id
 863         {
 864                 GstElement *selector = gst_bin_get_by_name(pipeline , "switch_audio" );
 865                 audioStream audio;
 866                 audio.pad = pad;
 867                 _this->m_audioStreams.push_back(audio);
 868                 if ( selector )
 869                 {
 870                         GstPadLinkReturn ret = gst_pad_link(pad, gst_element_get_request_pad (selector, "sink%d"));
 871                         if ( _this->m_audioStreams.size() == 1 )
 872                         {
 873                                 _this->selectAudioStream(0);
 874                                 gst_element_set_state (_this->m_gst_pipeline, GST_STATE_PLAYING);
 875                         }
 876                         else
 877                                 g_object_set (G_OBJECT (selector), "select-all", FALSE, NULL);
 878                 }
 879                 else
 880                         gst_pad_link(pad, gst_element_get_static_pad(gst_bin_get_by_name(pipeline,"queue_audio"), "sink"));
 881         }
 882         if (g_strrstr(name,"video"))
 883         {
 884                 gst_pad_link(pad, gst_element_get_static_pad(gst_bin_get_by_name(pipeline,"queue_video"), "sink"));
 885         }
 886         g_free (name);
 887 }
 888
 889 void eServiceMP3::gstCBfilterPadAdded(GstElement *filter, GstPad *pad, gpointer user_data)
 890 {
 891         eServiceMP3 *_this = (eServiceMP3*)user_data;
 892         GstElement *decoder = gst_bin_get_by_name(GST_BIN(_this->m_gst_pipeline),"decoder");
 893         gst_pad_link(pad, gst_element_get_static_pad (decoder, "sink"));
 894 }
 895
 896 void eServiceMP3::gstCBnewPad(GstElement *decodebin, GstPad *pad, gboolean last, gpointer user_data)
 897 {
 898         eServiceMP3 *_this = (eServiceMP3*)user_data;
 899         GstCaps *caps;
 900         GstStructure *str;
 901         GstPad *audiopad;
 902
 903         /* only link once */
 904         GstElement *audio = gst_bin_get_by_name(GST_BIN(_this->m_gst_pipeline),"audiobin");
 905         audiopad = gst_element_get_static_pad (audio, "sink");
 906         if ( !audiopad || GST_PAD_IS_LINKED (audiopad)) {
 907                 eDebug("audio already linked!");
 908                 g_object_unref (audiopad);
 909                 return;
 910         }
 911
 912         /* check media type */
 913         caps = gst_pad_get_caps (pad);
 914         str = gst_caps_get_structure (caps, 0);
 915         eDebug("gst new pad! %s", gst_structure_get_name (str));
 916
 917         if (!g_strrstr (gst_structure_get_name (str), "audio")) {
 918                 gst_caps_unref (caps);
 919                 gst_object_unref (audiopad);
 920                 return;
 921         }
 922
 923         gst_caps_unref (caps);
 924         gst_pad_link (pad, audiopad);
 925 }
 926
 927 void eServiceMP3::gstCBunknownType(GstElement *decodebin, GstPad *pad, GstCaps *caps, gpointer user_data)
 928 {
 929         GstStructure *str;
 930
 931         /* check media type */
 932         caps = gst_pad_get_caps (pad);
 933         str = gst_caps_get_structure (caps, 0);
 934         eDebug("unknown type: %s - this can't be decoded.", gst_structure_get_name (str));
 935         gst_caps_unref (caps);
 936 }
 937
 938 void eServiceMP3::gstPoll(const int&)
 939 {
 940                 /* ok, we have a serious problem here. gstBusSyncHandler sends
 941                    us the wakup signal, but likely before it was posted.
 942                    the usleep, an EVIL HACK (DON'T DO THAT!!!) works around this.
 943
 944                    I need to understand the API a bit more to make this work
 945                    proplerly. */
 946         usleep(1);
 947
 948         GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline));
 949         GstMessage *message;
 950         while ((message = gst_bus_pop (bus)))
 951         {
 952                 gstBusCall(bus, message);
 953                 gst_message_unref (message);
 954         }
 955 }
 956
 957 eAutoInitPtr<eServiceFactoryMP3> init_eServiceFactoryMP3(eAutoInitNumbers::service+1, "eServiceFactoryMP3");
 958 #else
 959 #warning gstreamer not available, not building media player
 960 #endif