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/components/file_eraser.h>
  12 #include <lib/base/init_num.h>
  13 #include <lib/base/init.h>
  14 #include <gst/gst.h>
  15 #include <sys/stat.h>
  16 /* for subtitles */
  17 #include <lib/gui/esubtitle.h>
  18
  19 // eServiceFactoryMP3
  20
  21 eServiceFactoryMP3::eServiceFactoryMP3()
  22 {
  23         ePtr<eServiceCenter> sc;
  24
  25         eServiceCenter::getPrivInstance(sc);
  26         if (sc)
  27         {
  28                 std::list<std::string> extensions;
  29                 extensions.push_back("mp3");
  30                 extensions.push_back("ogg");
  31                 extensions.push_back("mpg");
  32                 extensions.push_back("vob");
  33                 extensions.push_back("wav");
  34                 extensions.push_back("wave");
  35                 extensions.push_back("mkv");
  36                 extensions.push_back("avi");
  37                 sc->addServiceFactory(eServiceFactoryMP3::id, this, extensions);
  38         }
  39
  40         m_service_info = new eStaticServiceMP3Info();
  41 }
  42
  43 eServiceFactoryMP3::~eServiceFactoryMP3()
  44 {
  45         ePtr<eServiceCenter> sc;
  46
  47         eServiceCenter::getPrivInstance(sc);
  48         if (sc)
  49                 sc->removeServiceFactory(eServiceFactoryMP3::id);
  50 }
  51
  52 DEFINE_REF(eServiceFactoryMP3)
  53
  54         // iServiceHandler
  55 RESULT eServiceFactoryMP3::play(const eServiceReference &ref, ePtr<iPlayableService> &ptr)
  56 {
  57                 // check resources...
  58         ptr = new eServiceMP3(ref.path.c_str());
  59         return 0;
  60 }
  61
  62 RESULT eServiceFactoryMP3::record(const eServiceReference &ref, ePtr<iRecordableService> &ptr)
  63 {
  64         ptr=0;
  65         return -1;
  66 }
  67
  68 RESULT eServiceFactoryMP3::list(const eServiceReference &, ePtr<iListableService> &ptr)
  69 {
  70         ptr=0;
  71         return -1;
  72 }
  73
  74 RESULT eServiceFactoryMP3::info(const eServiceReference &ref, ePtr<iStaticServiceInformation> &ptr)
  75 {
  76         ptr = m_service_info;
  77         return 0;
  78 }
  79
  80 class eMP3ServiceOfflineOperations: public iServiceOfflineOperations
  81 {
  82         DECLARE_REF(eMP3ServiceOfflineOperations);
  83         eServiceReference m_ref;
  84 public:
  85         eMP3ServiceOfflineOperations(const eServiceReference &ref);
  86
  87         RESULT deleteFromDisk(int simulate);
  88         RESULT getListOfFilenames(std::list<std::string> &);
  89 };
  90
  91 DEFINE_REF(eMP3ServiceOfflineOperations);
  92
  93 eMP3ServiceOfflineOperations::eMP3ServiceOfflineOperations(const eServiceReference &ref): m_ref((const eServiceReference&)ref)
  94 {
  95 }
  96
  97 RESULT eMP3ServiceOfflineOperations::deleteFromDisk(int simulate)
  98 {
  99         if (simulate)
 100                 return 0;
 101         else
 102         {
 103                 std::list<std::string> res;
 104                 if (getListOfFilenames(res))
 105                         return -1;
 106
 107                 eBackgroundFileEraser *eraser = eBackgroundFileEraser::getInstance();
 108                 if (!eraser)
 109                         eDebug("FATAL !! can't get background file eraser");
 110
 111                 for (std::list<std::string>::iterator i(res.begin()); i != res.end(); ++i)
 112                 {
 113                         eDebug("Removing %s...", i->c_str());
 114                         if (eraser)
 115                                 eraser->erase(i->c_str());
 116                         else
 117                                 ::unlink(i->c_str());
 118                 }
 119
 120                 return 0;
 121         }
 122 }
 123
 124 RESULT eMP3ServiceOfflineOperations::getListOfFilenames(std::list<std::string> &res)
 125 {
 126         res.clear();
 127         res.push_back(m_ref.path);
 128         return 0;
 129 }
 130
 131
 132 RESULT eServiceFactoryMP3::offlineOperations(const eServiceReference &ref, ePtr<iServiceOfflineOperations> &ptr)
 133 {
 134         ptr = new eMP3ServiceOfflineOperations(ref);
 135         return 0;
 136 }
 137
 138 // eStaticServiceMP3Info
 139
 140
 141 // eStaticServiceMP3Info is seperated from eServiceMP3 to give information
 142 // about unopened files.
 143
 144 // probably eServiceMP3 should use this class as well, and eStaticServiceMP3Info
 145 // should have a database backend where ID3-files etc. are cached.
 146 // this would allow listing the mp3 database based on certain filters.
 147
 148 DEFINE_REF(eStaticServiceMP3Info)
 149
 150 eStaticServiceMP3Info::eStaticServiceMP3Info()
 151 {
 152 }
 153
 154 RESULT eStaticServiceMP3Info::getName(const eServiceReference &ref, std::string &name)
 155 {
 156         size_t last = ref.path.rfind('/');
 157         if (last != std::string::npos)
 158                 name = ref.path.substr(last+1);
 159         else
 160                 name = ref.path;
 161         return 0;
 162 }
 163
 164 int eStaticServiceMP3Info::getLength(const eServiceReference &ref)
 165 {
 166         return -1;
 167 }
 168
 169 // eServiceMP3
 170
 171 eServiceMP3::eServiceMP3(const char *filename): m_filename(filename), m_pump(eApp, 1)
 172 {
 173         m_stream_tags = 0;
 174         m_audioStreams.clear();
 175         m_subtitleStreams.clear();
 176         m_currentAudioStream = 0;
 177         m_currentSubtitleStream = 0;
 178         m_subtitle_widget = 0;
 179         m_currentTrickRatio = 0;
 180         CONNECT(m_seekTimeout.timeout, eServiceMP3::seekTimeoutCB);
 181         CONNECT(m_pump.recv_msg, eServiceMP3::gstPoll);
 182         GstElement *source = 0;
 183
 184         GstElement *decoder = 0, *conv = 0, *flt = 0, *sink = 0; /* for audio */
 185
 186         GstElement *audio = 0, *switch_audio = 0, *queue_audio = 0, *video = 0, *queue_video = 0, *videodemux = 0;
 187
 188         m_state = stIdle;
 189         eDebug("SERVICEMP3 construct!");
 190
 191                 /* FIXME: currently, decodebin isn't possible for
 192                    video streams. in that case, make a manual pipeline. */
 193
 194         const char *ext = strrchr(filename, '.');
 195         if (!ext)
 196                 ext = filename;
 197
 198         int is_mpeg_ps = !(strcasecmp(ext, ".mpeg") && strcasecmp(ext, ".mpg") && strcasecmp(ext, ".vob") && strcasecmp(ext, ".bin") && strcasecmp(ext, ".dat"));
 199         int is_mpeg_ts = !strcasecmp(ext, ".ts");
 200         int is_matroska = !strcasecmp(ext, ".mkv");
 201         int is_avi = !strcasecmp(ext, ".avi");
 202         int is_mp3 = !strcasecmp(ext, ".mp3"); /* force mp3 instead of decodebin */
 203         int is_video = is_mpeg_ps || is_mpeg_ts || is_matroska || is_avi;
 204         int is_streaming = !strncmp(filename, "http://", 7);
 205         int is_AudioCD = !(strncmp(filename, "/autofs/", 8) || strncmp(filename+strlen(filename)-13, "/track-", 7) || strcasecmp(ext, ".wav"));
 206
 207         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);
 208
 209         int is_audio = !is_video;
 210
 211         int all_ok = 0;
 212
 213         m_gst_pipeline = gst_pipeline_new ("mediaplayer");
 214         if (!m_gst_pipeline)
 215                 eWarning("failed to create pipeline");
 216
 217         if (is_AudioCD)
 218         {
 219                 source = gst_element_factory_make ("cdiocddasrc", "cda-source");
 220                 if (source)
 221                         g_object_set (G_OBJECT (source), "device", "/dev/cdroms/cdrom0", NULL);
 222                 else
 223                         is_AudioCD = 0;
 224         }
 225         if ( !is_streaming && !is_AudioCD )
 226                 source = gst_element_factory_make ("filesrc", "file-source");
 227         else if ( is_streaming )
 228         {
 229                 source = gst_element_factory_make ("neonhttpsrc", "http-source");
 230                 if (source)
 231                         g_object_set (G_OBJECT (source), "automatic-redirect", TRUE, NULL);
 232         }
 233
 234         if (!source)
 235                 eWarning("failed to create %s", is_streaming ? "neonhttpsrc" : "filesrc");
 236                                 /* configure source */
 237         else if (!is_AudioCD)
 238                 g_object_set (G_OBJECT (source), "location", filename, NULL);
 239         else
 240         {
 241                 int track = atoi(filename+18);
 242                 eDebug("play audio CD track #%i",track);
 243                 if (track > 0)
 244                         g_object_set (G_OBJECT (source), "track", track, NULL);
 245         }
 246
 247         if (is_audio)
 248         {
 249                         /* filesrc -> decodebin -> audioconvert -> capsfilter -> alsasink */
 250                 const char *decodertype = "decodebin";
 251
 252                 decoder = gst_element_factory_make (decodertype, "decoder");
 253                 if (!decoder)
 254                         eWarning("failed to create %s decoder", decodertype);
 255
 256                 conv = gst_element_factory_make ("audioconvert", "converter");
 257                 if (!conv)
 258                         eWarning("failed to create audioconvert");
 259
 260                 flt = gst_element_factory_make ("capsfilter", "flt");
 261                 if (!flt)
 262                         eWarning("failed to create capsfilter");
 263
 264                         /* for some reasons, we need to set the sample format to depth/width=16, because auto negotiation doesn't work. */
 265                         /* endianness, however, is not required to be set anymore. */
 266                 if (flt)
 267                 {
 268                         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);
 269                         g_object_set (G_OBJECT (flt), "caps", caps, (char*)0);
 270                         gst_caps_unref(caps);
 271                 }
 272
 273                 sink = gst_element_factory_make ("alsasink", "alsa-output");
 274                 if (!sink)
 275                         eWarning("failed to create osssink");
 276
 277                 if (source && decoder && conv && sink)
 278                         all_ok = 1;
 279         } else /* is_video */
 280         {
 281                         /* filesrc -> mpegdemux -> | queue_audio -> dvbaudiosink
 282                                                    | queue_video -> dvbvideosink */
 283
 284                 audio = gst_element_factory_make("dvbaudiosink", "audiosink");
 285                 queue_audio = gst_element_factory_make("queue", "queue_audio");
 286
 287                 video = gst_element_factory_make("dvbvideosink", "videosink");
 288                 queue_video = gst_element_factory_make("queue", "queue_video");
 289
 290                 if (is_mpeg_ps)
 291                         videodemux = gst_element_factory_make("flupsdemux", "videodemux");
 292                 else if (is_mpeg_ts)
 293                         videodemux = gst_element_factory_make("flutsdemux", "videodemux");
 294                 else if (is_matroska)
 295                         videodemux = gst_element_factory_make("matroskademux", "videodemux");
 296                 else if (is_avi)
 297                         videodemux = gst_element_factory_make("avidemux", "videodemux");
 298
 299                 if (!videodemux)
 300                 {
 301                         eDebug("fluendo mpegdemux not available, falling back to mpegdemux\n");
 302                         videodemux = gst_element_factory_make("mpegdemux", "videodemux");
 303                 }
 304
 305                 eDebug("audio: %p, queue_audio %p, video %p, queue_video %p, videodemux %p", audio, queue_audio, video, queue_video, videodemux);
 306                 if (audio && queue_audio && video && queue_video && videodemux)
 307                 {
 308                         g_object_set (G_OBJECT (queue_audio), "max-size-bytes", 256*1024, NULL);
 309                         g_object_set (G_OBJECT (queue_audio), "max-size-buffers", 0, NULL);
 310                         g_object_set (G_OBJECT (queue_audio), "max-size-time", (guint64)0, NULL);
 311                         g_object_set (G_OBJECT (queue_video), "max-size-buffers", 0, NULL);
 312                         g_object_set (G_OBJECT (queue_video), "max-size-bytes", 2*1024*1024, NULL);
 313                         g_object_set (G_OBJECT (queue_video), "max-size-time", (guint64)0, NULL);
 314                         all_ok = 1;
 315                 }
 316         }
 317
 318         if (m_gst_pipeline && all_ok)
 319         {
 320                 gst_bus_set_sync_handler(gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline)), gstBusSyncHandler, this);
 321
 322                 if (is_AudioCD)
 323                 {
 324                         queue_audio = gst_element_factory_make("queue", "queue_audio");
 325                         g_object_set (G_OBJECT (sink), "preroll-queue-len", 80, NULL);
 326                         gst_bin_add_many (GST_BIN (m_gst_pipeline), source, queue_audio, conv, sink, NULL);
 327                         gst_element_link_many(source, queue_audio, conv, sink, NULL);
 328                 }
 329                 else if (is_audio)
 330                 {
 331                         queue_audio = gst_element_factory_make("queue", "queue_audio");
 332
 333                         g_signal_connect (decoder, "new-decoded-pad", G_CALLBACK(gstCBnewPad), this);
 334                         g_signal_connect (decoder, "unknown-type", G_CALLBACK(gstCBunknownType), this);
 335
 336                         if (!is_mp3)
 337                                 g_object_set (G_OBJECT (sink), "preroll-queue-len", 80, NULL);
 338
 339                                 /* gst_bin will take the 'floating references' */
 340                         gst_bin_add_many (GST_BIN (m_gst_pipeline),
 341                                                 source, queue_audio, decoder, NULL);
 342
 343                                 /* in decodebin's case we can just connect the source with the decodebin, and decodebin will take care about id3demux (or whatever is required) */
 344                         gst_element_link_many(source, queue_audio, decoder, NULL);
 345
 346                                 /* create audio bin with the audioconverter, the capsfilter and the audiosink */
 347                         audio = gst_bin_new ("audiobin");
 348
 349                         GstPad *audiopad = gst_element_get_static_pad (conv, "sink");
 350                         gst_bin_add_many(GST_BIN(audio), conv, flt, sink, (char*)0);
 351                         gst_element_link_many(conv, flt, sink, (char*)0);
 352                         gst_element_add_pad(audio, gst_ghost_pad_new ("sink", audiopad));
 353                         gst_object_unref(audiopad);
 354                         gst_bin_add (GST_BIN(m_gst_pipeline), audio);
 355                                 /* in mad's case, we can directly connect the decoder to the audiobin. otherwise, we do this in gstCBnewPad */
 356                         if (is_mp3)
 357                                 gst_element_link(decoder, audio);
 358
 359                 } else /* is_video */
 360                 {
 361                         char srt_filename[strlen(filename)+1];
 362                         strncpy(srt_filename,filename,strlen(filename)-3);
 363                         srt_filename[strlen(filename)-3]='\0';
 364                         strcat(srt_filename, "srt");
 365                         struct stat buffer;
 366                         if (stat(srt_filename, &buffer) == 0)
 367                         {
 368                                 eDebug("subtitle file found: %s",srt_filename);
 369                                 GstElement *subsource = gst_element_factory_make ("filesrc", "srt_source");
 370                                 g_object_set (G_OBJECT (subsource), "location", srt_filename, NULL);
 371                                 GstElement *parser = gst_element_factory_make("subparse", "parse_subtitles");
 372                                 GstElement *switch_subtitles = gst_element_factory_make ("input-selector", "switch_subtitles");
 373                                 GstElement *sink = gst_element_factory_make("fakesink", "sink_subtitles");
 374                                 gst_bin_add_many(GST_BIN (m_gst_pipeline), subsource, switch_subtitles, parser, sink, NULL);
 375                                 gst_element_link(subsource, switch_subtitles);
 376                                 gst_element_link(switch_subtitles, parser);
 377                                 gst_element_link(parser, sink);
 378                                 g_object_set (G_OBJECT(switch_subtitles), "select-all", TRUE, NULL);
 379                                 g_object_set (G_OBJECT(sink), "signal-handoffs", TRUE, NULL);
 380                                 g_object_set (G_OBJECT(sink), "sync", TRUE, NULL);
 381                                 g_signal_connect(sink, "handoff", G_CALLBACK(gstCBsubtitleAvail), this);
 382                                 subtitleStream subs;
 383                                 subs.language_code = std::string(".srt file");
 384                                 m_subtitleStreams.push_back(subs);
 385                         }
 386                         gst_bin_add_many(GST_BIN(m_gst_pipeline), source, videodemux, audio, queue_audio, video, queue_video, NULL);
 387                         switch_audio = gst_element_factory_make ("input-selector", "switch_audio");
 388                         if (switch_audio)
 389                         {
 390                                 g_object_set (G_OBJECT (switch_audio), "select-all", TRUE, NULL);
 391                                 gst_bin_add(GST_BIN(m_gst_pipeline), switch_audio);
 392                                 gst_element_link(switch_audio, queue_audio);
 393                         }
 394                         gst_element_link(source, videodemux);
 395                         gst_element_link(queue_audio, audio);
 396                         gst_element_link(queue_video, video);
 397                         g_signal_connect(videodemux, "pad-added", G_CALLBACK (gstCBpadAdded), this);
 398                 }
 399         } else
 400         {
 401                 if (m_gst_pipeline)
 402                         gst_object_unref(GST_OBJECT(m_gst_pipeline));
 403                 if (source)
 404                         gst_object_unref(GST_OBJECT(source));
 405                 if (decoder)
 406                         gst_object_unref(GST_OBJECT(decoder));
 407                 if (conv)
 408                         gst_object_unref(GST_OBJECT(conv));
 409                 if (sink)
 410                         gst_object_unref(GST_OBJECT(sink));
 411
 412                 if (audio)
 413                         gst_object_unref(GST_OBJECT(audio));
 414                 if (queue_audio)
 415                         gst_object_unref(GST_OBJECT(queue_audio));
 416                 if (video)
 417                         gst_object_unref(GST_OBJECT(video));
 418                 if (queue_video)
 419                         gst_object_unref(GST_OBJECT(queue_video));
 420                 if (videodemux)
 421                         gst_object_unref(GST_OBJECT(videodemux));
 422                 if (switch_audio)
 423                         gst_object_unref(GST_OBJECT(switch_audio));
 424
 425                 eDebug("sorry, can't play.");
 426                 m_gst_pipeline = 0;
 427         }
 428
 429         gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 430 }
 431
 432 eServiceMP3::~eServiceMP3()
 433 {
 434         delete m_subtitle_widget;
 435         if (m_state == stRunning)
 436                 stop();
 437
 438         if (m_stream_tags)
 439                 gst_tag_list_free(m_stream_tags);
 440
 441         if (m_gst_pipeline)
 442         {
 443                 gst_object_unref (GST_OBJECT (m_gst_pipeline));
 444                 eDebug("SERVICEMP3 destruct!");
 445         }
 446 }
 447
 448 DEFINE_REF(eServiceMP3);
 449
 450 RESULT eServiceMP3::connectEvent(const Slot2<void,iPlayableService*,int> &event, ePtr<eConnection> &connection)
 451 {
 452         connection = new eConnection((iPlayableService*)this, m_event.connect(event));
 453         return 0;
 454 }
 455
 456 RESULT eServiceMP3::start()
 457 {
 458         assert(m_state == stIdle);
 459
 460         m_state = stRunning;
 461         if (m_gst_pipeline)
 462         {
 463                 eDebug("starting pipeline");
 464                 gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 465         }
 466         m_event(this, evStart);
 467         return 0;
 468 }
 469
 470 RESULT eServiceMP3::stop()
 471 {
 472         assert(m_state != stIdle);
 473         if (m_state == stStopped)
 474                 return -1;
 475         eDebug("MP3: %s stop\n", m_filename.c_str());
 476         gst_element_set_state(m_gst_pipeline, GST_STATE_NULL);
 477         m_state = stStopped;
 478         return 0;
 479 }
 480
 481 RESULT eServiceMP3::setTarget(int target)
 482 {
 483         return -1;
 484 }
 485
 486 RESULT eServiceMP3::pause(ePtr<iPauseableService> &ptr)
 487 {
 488         ptr=this;
 489         return 0;
 490 }
 491
 492 RESULT eServiceMP3::setSlowMotion(int ratio)
 493 {
 494         /* we can't do slomo yet */
 495         return -1;
 496 }
 497
 498 RESULT eServiceMP3::setFastForward(int ratio)
 499 {
 500         m_currentTrickRatio = ratio;
 501         if (ratio)
 502                 m_seekTimeout.start(1000, 0);
 503         else
 504                 m_seekTimeout.stop();
 505         return 0;
 506 }
 507
 508 void eServiceMP3::seekTimeoutCB()
 509 {
 510         pts_t ppos, len;
 511         getPlayPosition(ppos);
 512         getLength(len);
 513         ppos += 90000*m_currentTrickRatio;
 514
 515         if (ppos < 0)
 516         {
 517                 ppos = 0;
 518                 m_seekTimeout.stop();
 519         }
 520         if (ppos > len)
 521         {
 522                 ppos = 0;
 523                 stop();
 524                 m_seekTimeout.stop();
 525                 return;
 526         }
 527         seekTo(ppos);
 528 }
 529
 530                 // iPausableService
 531 RESULT eServiceMP3::pause()
 532 {
 533         if (!m_gst_pipeline)
 534                 return -1;
 535         GstStateChangeReturn res = gst_element_set_state(m_gst_pipeline, GST_STATE_PAUSED);
 536         if (res == GST_STATE_CHANGE_ASYNC)
 537         {
 538                 pts_t ppos;
 539                 getPlayPosition(ppos);
 540                 seekTo(ppos);
 541         }
 542         return 0;
 543 }
 544
 545 RESULT eServiceMP3::unpause()
 546 {
 547         if (!m_gst_pipeline)
 548                 return -1;
 549
 550         GstStateChangeReturn res;
 551         res = gst_element_set_state(m_gst_pipeline, GST_STATE_PLAYING);
 552         return 0;
 553 }
 554
 555         /* iSeekableService */
 556 RESULT eServiceMP3::seek(ePtr<iSeekableService> &ptr)
 557 {
 558         ptr = this;
 559         return 0;
 560 }
 561
 562 RESULT eServiceMP3::getLength(pts_t &pts)
 563 {
 564         if (!m_gst_pipeline)
 565                 return -1;
 566         if (m_state != stRunning)
 567                 return -1;
 568
 569         GstFormat fmt = GST_FORMAT_TIME;
 570         gint64 len;
 571
 572         if (!gst_element_query_duration(m_gst_pipeline, &fmt, &len))
 573                 return -1;
 574
 575                 /* len is in nanoseconds. we have 90 000 pts per second. */
 576
 577         pts = len / 11111;
 578         return 0;
 579 }
 580
 581 RESULT eServiceMP3::seekTo(pts_t to)
 582 {
 583         if (!m_gst_pipeline)
 584                 return -1;
 585
 586                 /* convert pts to nanoseconds */
 587         gint64 time_nanoseconds = to * 11111LL;
 588         if (!gst_element_seek (m_gst_pipeline, 1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
 589                 GST_SEEK_TYPE_SET, time_nanoseconds,
 590                 GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE))
 591         {
 592                 eDebug("SEEK failed");
 593                 return -1;
 594         }
 595         return 0;
 596 }
 597
 598 RESULT eServiceMP3::seekRelative(int direction, pts_t to)
 599 {
 600         if (!m_gst_pipeline)
 601                 return -1;
 602
 603         pts_t ppos;
 604         getPlayPosition(ppos);
 605         ppos += to * direction;
 606         if (ppos < 0)
 607                 ppos = 0;
 608         seekTo(ppos);
 609
 610         return 0;
 611 }
 612
 613 RESULT eServiceMP3::getPlayPosition(pts_t &pts)
 614 {
 615         if (!m_gst_pipeline)
 616                 return -1;
 617         if (m_state != stRunning)
 618                 return -1;
 619
 620         GstFormat fmt = GST_FORMAT_TIME;
 621         gint64 len;
 622
 623         if (!gst_element_query_position(m_gst_pipeline, &fmt, &len))
 624                 return -1;
 625
 626                 /* len is in nanoseconds. we have 90 000 pts per second. */
 627         pts = len / 11111;
 628         return 0;
 629 }
 630
 631 RESULT eServiceMP3::setTrickmode(int trick)
 632 {
 633                 /* trickmode is not yet supported by our dvbmediasinks. */
 634         return -1;
 635 }
 636
 637 RESULT eServiceMP3::isCurrentlySeekable()
 638 {
 639         return 1;
 640 }
 641
 642 RESULT eServiceMP3::info(ePtr<iServiceInformation>&i)
 643 {
 644         i = this;
 645         return 0;
 646 }
 647
 648 RESULT eServiceMP3::getName(std::string &name)
 649 {
 650         name = m_filename;
 651         size_t n = name.rfind('/');
 652         if (n != std::string::npos)
 653                 name = name.substr(n + 1);
 654         return 0;
 655 }
 656
 657 int eServiceMP3::getInfo(int w)
 658 {
 659         gchar *tag = 0;
 660
 661         switch (w)
 662         {
 663         case sTitle:
 664         case sArtist:
 665         case sAlbum:
 666         case sComment:
 667         case sTracknumber:
 668         case sGenre:
 669         case sVideoType:
 670                 return resIsString;
 671         case sCurrentTitle:
 672                 tag = GST_TAG_TRACK_NUMBER;
 673                 break;
 674         case sTotalTitles:
 675                 tag = GST_TAG_TRACK_COUNT;
 676                 break;
 677         default:
 678                 return resNA;
 679         }
 680
 681         if (!m_stream_tags || !tag)
 682                 return 0;
 683
 684         guint value;
 685         if (gst_tag_list_get_uint(m_stream_tags, tag, &value))
 686                 return (int) value;
 687
 688         return 0;
 689
 690 }
 691
 692 std::string eServiceMP3::getInfoString(int w)
 693 {
 694         gchar *tag = 0;
 695         switch (w)
 696         {
 697         case sTitle:
 698                 tag = GST_TAG_TITLE;
 699                 break;
 700         case sArtist:
 701                 tag = GST_TAG_ARTIST;
 702                 break;
 703         case sAlbum:
 704                 tag = GST_TAG_ALBUM;
 705                 break;
 706         case sComment:
 707                 tag = GST_TAG_COMMENT;
 708                 break;
 709         case sTracknumber:
 710                 tag = GST_TAG_TRACK_NUMBER;
 711                 break;
 712         case sGenre:
 713                 tag = GST_TAG_GENRE;
 714                 break;
 715         case sVideoType:
 716                 tag = GST_TAG_VIDEO_CODEC;
 717                 break;
 718         default:
 719                 return "";
 720         }
 721
 722         if (!m_stream_tags || !tag)
 723                 return "";
 724
 725         gchar *value;
 726
 727         if (gst_tag_list_get_string(m_stream_tags, tag, &value))
 728         {
 729                 std::string res = value;
 730                 g_free(value);
 731                 return res;
 732         }
 733
 734         return "";
 735 }
 736
 737 RESULT eServiceMP3::audioChannel(ePtr<iAudioChannelSelection> &ptr)
 738 {
 739         ptr = this;
 740         return 0;
 741 }
 742
 743 RESULT eServiceMP3::audioTracks(ePtr<iAudioTrackSelection> &ptr)
 744 {
 745         ptr = this;
 746         return 0;
 747 }
 748
 749 RESULT eServiceMP3::subtitle(ePtr<iSubtitleOutput> &ptr)
 750 {
 751         ptr = this;
 752         return 0;
 753 }
 754
 755 int eServiceMP3::getNumberOfTracks()
 756 {
 757         return m_audioStreams.size();
 758 }
 759
 760 int eServiceMP3::getCurrentTrack()
 761 {
 762         return m_currentAudioStream;
 763 }
 764
 765 RESULT eServiceMP3::selectTrack(unsigned int i)
 766 {
 767         int ret = selectAudioStream(i);
 768         /* flush */
 769         pts_t ppos;
 770         getPlayPosition(ppos);
 771         seekTo(ppos);
 772
 773         return ret;
 774 }
 775
 776 int eServiceMP3::selectAudioStream(int i)
 777 {
 778         gint nb_sources;
 779         GstPad *active_pad;
 780         GstElement *switch_audio = gst_bin_get_by_name(GST_BIN(m_gst_pipeline),"switch_audio");
 781         if ( !switch_audio )
 782         {
 783                 eDebug("can't switch audio tracks! gst-plugin-selector needed");
 784                 return -1;
 785         }
 786         g_object_get (G_OBJECT (switch_audio), "n-pads", &nb_sources, NULL);
 787         if ( (unsigned int)i >= m_audioStreams.size() || i >= nb_sources || (unsigned int)m_currentAudioStream >= m_audioStreams.size() )
 788                 return -2;
 789         char sinkpad[8];
 790         sprintf(sinkpad, "sink%d", i);
 791         g_object_set (G_OBJECT (switch_audio), "active-pad", gst_element_get_pad (switch_audio, sinkpad), NULL);
 792         g_object_get (G_OBJECT (switch_audio), "active-pad", &active_pad, NULL);
 793         gchar *name;
 794         name = gst_pad_get_name (active_pad);
 795         eDebug ("switched audio to (%s)", name);
 796         g_free(name);
 797         m_currentAudioStream = i;
 798         return 0;
 799 }
 800
 801 int eServiceMP3::getCurrentChannel()
 802 {
 803         return STEREO;
 804 }
 805
 806 RESULT eServiceMP3::selectChannel(int i)
 807 {
 808         eDebug("eServiceMP3::selectChannel(%i)",i);
 809         return 0;
 810 }
 811
 812 RESULT eServiceMP3::getTrackInfo(struct iAudioTrackInfo &info, unsigned int i)
 813 {
 814 //      eDebug("eServiceMP3::getTrackInfo(&info, %i)",i);
 815         if (i >= m_audioStreams.size())
 816                 return -2;
 817         if (m_audioStreams[i].type == audioStream::atMPEG)
 818                 info.m_description = "MPEG";
 819         else if (m_audioStreams[i].type == audioStream::atMP3)
 820                 info.m_description = "MP3";
 821         else if (m_audioStreams[i].type == audioStream::atAC3)
 822                 info.m_description = "AC3";
 823         else if (m_audioStreams[i].type == audioStream::atAAC)
 824                 info.m_description = "AAC";
 825         else if (m_audioStreams[i].type == audioStream::atDTS)
 826                 info.m_description = "DTS";
 827         else if (m_audioStreams[i].type == audioStream::atPCM)
 828                 info.m_description = "PCM";
 829         else if (m_audioStreams[i].type == audioStream::atOGG)
 830                 info.m_description = "OGG";
 831         else
 832                 info.m_description = "???";
 833         if (info.m_language.empty())
 834                 info.m_language = m_audioStreams[i].language_code;
 835         return 0;
 836 }
 837
 838 void eServiceMP3::gstBusCall(GstBus *bus, GstMessage *msg)
 839 {
 840         if (!msg)
 841                 return;
 842         gchar *sourceName;
 843         GstObject *source;
 844
 845         source = GST_MESSAGE_SRC(msg);
 846         sourceName = gst_object_get_name(source);
 847
 848         if (gst_message_get_structure(msg))
 849         {
 850                 gchar *string = gst_structure_to_string(gst_message_get_structure(msg));
 851                 eDebug("gst_message from %s: %s", sourceName, string);
 852                 g_free(string);
 853         }
 854         else
 855                 eDebug("gst_message from %s: %s (without structure)", sourceName, GST_MESSAGE_TYPE_NAME(msg));
 856
 857         switch (GST_MESSAGE_TYPE (msg))
 858         {
 859         case GST_MESSAGE_EOS:
 860                 m_event((iPlayableService*)this, evEOF);
 861                 break;
 862         case GST_MESSAGE_ERROR:
 863         {
 864                 gchar *debug;
 865                 GError *err;
 866
 867                 gst_message_parse_error (msg, &err, &debug);
 868                 g_free (debug);
 869                 eWarning("Gstreamer error: %s (%i)", err->message, err->code );
 870                 if ( err->domain == GST_STREAM_ERROR && err->code == GST_STREAM_ERROR_DECODE )
 871                 {
 872                         if ( g_strrstr(sourceName, "videosink") )
 873                                 m_event((iPlayableService*)this, evUser+11);
 874                 }
 875                 g_error_free(err);
 876                         /* TODO: signal error condition to user */
 877                 break;
 878         }
 879         case GST_MESSAGE_TAG:
 880         {
 881                 GstTagList *tags, *result;
 882                 gst_message_parse_tag(msg, &tags);
 883
 884                 result = gst_tag_list_merge(m_stream_tags, tags, GST_TAG_MERGE_PREPEND);
 885                 if (result)
 886                 {
 887                         if (m_stream_tags)
 888                                 gst_tag_list_free(m_stream_tags);
 889                         m_stream_tags = result;
 890                 }
 891
 892                 gchar *g_audiocodec;
 893                 if ( gst_tag_list_get_string(tags, GST_TAG_AUDIO_CODEC, &g_audiocodec) && m_audioStreams.size() == 0 )
 894                 {
 895                         GstPad* pad = gst_element_get_pad (GST_ELEMENT(source), "src");
 896                         GstCaps* caps = gst_pad_get_caps(pad);
 897                         GstStructure* str = gst_caps_get_structure(caps, 0);
 898                         if ( !str )
 899                                 break;
 900                         audioStream audio;
 901                         audio.type = gstCheckAudioPad(str);
 902                         m_audioStreams.push_back(audio);
 903                 }
 904                 break;
 905         }
 906         case GST_MESSAGE_ASYNC_DONE:
 907         {
 908                 GstTagList *tags;
 909                 for (std::vector<audioStream>::iterator IterAudioStream(m_audioStreams.begin()); IterAudioStream != m_audioStreams.end(); ++IterAudioStream)
 910                 {
 911                         if ( IterAudioStream->pad )
 912                         {
 913                                 g_object_get(IterAudioStream->pad, "tags", &tags, NULL);
 914                                 gchar *g_language;
 915                                 if ( gst_is_tag_list(tags) && gst_tag_list_get_string(tags, GST_TAG_LANGUAGE_CODE, &g_language) )
 916                                 {
 917                                         eDebug("found audio language %s",g_language);
 918                                         IterAudioStream->language_code = std::string(g_language);
 919                                         g_free (g_language);
 920                                 }
 921                         }
 922                 }
 923                 for (std::vector<subtitleStream>::iterator IterSubtitleStream(m_subtitleStreams.begin()); IterSubtitleStream != m_subtitleStreams.end(); ++IterSubtitleStream)
 924                 {
 925                         if ( IterSubtitleStream->pad )
 926                         {
 927                                 g_object_get(IterSubtitleStream->pad, "tags", &tags, NULL);
 928                                 gchar *g_language;
 929                                 if ( gst_is_tag_list(tags) && gst_tag_list_get_string(tags, GST_TAG_LANGUAGE_CODE, &g_language) )
 930                                 {
 931                                         eDebug("found subtitle language %s",g_language);
 932                                         IterSubtitleStream->language_code = std::string(g_language);
 933                                         g_free (g_language);
 934                                 }
 935                         }
 936                 }
 937         }
 938         default:
 939                 break;
 940         }
 941         g_free (sourceName);
 942 }
 943
 944 GstBusSyncReply eServiceMP3::gstBusSyncHandler(GstBus *bus, GstMessage *message, gpointer user_data)
 945 {
 946         eServiceMP3 *_this = (eServiceMP3*)user_data;
 947         _this->m_pump.send(1);
 948                 /* wake */
 949         return GST_BUS_PASS;
 950 }
 951
 952 int eServiceMP3::gstCheckAudioPad(GstStructure* structure)
 953 {
 954         const gchar* type;
 955         type = gst_structure_get_name(structure);
 956
 957         if (!strcmp(type, "audio/mpeg")) {
 958                         gint mpegversion, layer = 0;
 959                         gst_structure_get_int (structure, "mpegversion", &mpegversion);
 960                         gst_structure_get_int (structure, "layer", &layer);
 961                         eDebug("mime audio/mpeg version %d layer %d", mpegversion, layer);
 962                         switch (mpegversion) {
 963                                 case 1:
 964                                 {
 965                                         if ( layer == 3 )
 966                                                 return audioStream::atMP3;
 967                                         else
 968                                                 return audioStream::atMPEG;
 969                                 }
 970                                 case 2:
 971                                         return audioStream::atMPEG;
 972                                 case 4:
 973                                         return audioStream::atAAC;
 974                                 default:
 975                                         return audioStream::atUnknown;
 976                         }
 977                 }
 978         else
 979         {
 980                 eDebug("mime %s", type);
 981                 if (!strcmp(type, "audio/x-ac3") || !strcmp(type, "audio/ac3"))
 982                         return audioStream::atAC3;
 983                 else if (!strcmp(type, "audio/x-dts") || !strcmp(type, "audio/dts"))
 984                         return audioStream::atDTS;
 985                 else if (!strcmp(type, "audio/x-raw-int"))
 986                         return audioStream::atPCM;
 987         }
 988         return audioStream::atUnknown;
 989 }
 990
 991 void eServiceMP3::gstCBpadAdded(GstElement *decodebin, GstPad *pad, gpointer user_data)
 992 {
 993         const gchar* type;
 994         GstCaps* caps;
 995         GstStructure* str;
 996         caps = gst_pad_get_caps(pad);
 997         str = gst_caps_get_structure(caps, 0);
 998         type = gst_structure_get_name(str);
 999
1000         eDebug("A new pad %s:%s was created", GST_OBJECT_NAME (decodebin), GST_OBJECT_NAME (pad));
1001
1002         eServiceMP3 *_this = (eServiceMP3*)user_data;
1003         GstBin *pipeline = GST_BIN(_this->m_gst_pipeline);
1004         if (g_strrstr(type,"audio"))
1005         {
1006                 audioStream audio;
1007                 audio.type = _this->gstCheckAudioPad(str);
1008                 GstElement *switch_audio = gst_bin_get_by_name(pipeline , "switch_audio");
1009                 if ( switch_audio )
1010                 {
1011                         GstPad *sinkpad = gst_element_get_request_pad (switch_audio, "sink%d");
1012                         gst_pad_link(pad, sinkpad);
1013                         audio.pad = sinkpad;
1014                         _this->m_audioStreams.push_back(audio);
1015
1016                         if ( _this->m_audioStreams.size() == 1 )
1017                         {
1018                                 _this->selectAudioStream(0);
1019                                 gst_element_set_state (_this->m_gst_pipeline, GST_STATE_PLAYING);
1020                         }
1021                         else
1022                                 g_object_set (G_OBJECT (switch_audio), "select-all", FALSE, NULL);
1023                 }
1024                 else
1025                 {
1026                         gst_pad_link(pad, gst_element_get_static_pad(gst_bin_get_by_name(pipeline,"queue_audio"), "sink"));
1027                         _this->m_audioStreams.push_back(audio);
1028                 }
1029         }
1030         if (g_strrstr(type,"video"))
1031         {
1032                 gst_pad_link(pad, gst_element_get_static_pad(gst_bin_get_by_name(pipeline,"queue_video"), "sink"));
1033         }
1034         if (g_strrstr(type,"application/x-ssa") || g_strrstr(type,"application/x-ass"))
1035         {
1036                 GstElement *switch_subtitles = gst_bin_get_by_name(pipeline,"switch_subtitles");
1037                 if ( !switch_subtitles )
1038                 {
1039                         switch_subtitles = gst_element_factory_make ("input-selector", "switch_subtitles");
1040                         if ( !switch_subtitles )
1041                                 return;
1042                         GstElement *parser = gst_element_factory_make("ssaparse", "parse_subtitles");
1043                         GstElement *sink = gst_element_factory_make("fakesink", "sink_subtitles");
1044                         gst_bin_add_many(pipeline, switch_subtitles, parser, sink, NULL);
1045                         gst_element_link(switch_subtitles, parser);
1046                         gst_element_link(parser, sink);
1047                         g_object_set (G_OBJECT(sink), "signal-handoffs", TRUE, NULL);
1048                         g_signal_connect(sink, "handoff", G_CALLBACK(gstCBsubtitleAvail), _this);
1049                 }
1050                 GstPad *sinkpad = gst_element_get_request_pad (switch_subtitles, "sink%d");
1051                 gst_pad_link(pad, sinkpad);
1052                 subtitleStream subs;
1053                 subs.pad = sinkpad;
1054                 _this->m_subtitleStreams.push_back(subs);
1055         }
1056 }
1057
1058 void eServiceMP3::gstCBfilterPadAdded(GstElement *filter, GstPad *pad, gpointer user_data)
1059 {
1060         eServiceMP3 *_this = (eServiceMP3*)user_data;
1061         GstElement *decoder = gst_bin_get_by_name(GST_BIN(_this->m_gst_pipeline),"decoder");
1062         gst_pad_link(pad, gst_element_get_static_pad (decoder, "sink"));
1063 }
1064
1065 void eServiceMP3::gstCBnewPad(GstElement *decodebin, GstPad *pad, gboolean last, gpointer user_data)
1066 {
1067         eServiceMP3 *_this = (eServiceMP3*)user_data;
1068         GstCaps *caps;
1069         GstStructure *str;
1070         GstPad *audiopad;
1071
1072         /* only link once */
1073         GstElement *audiobin = gst_bin_get_by_name(GST_BIN(_this->m_gst_pipeline),"audiobin");
1074         audiopad = gst_element_get_static_pad (audiobin, "sink");
1075         if ( !audiopad || GST_PAD_IS_LINKED (audiopad)) {
1076                 eDebug("audio already linked!");
1077                 g_object_unref (audiopad);
1078                 return;
1079         }
1080
1081         /* check media type */
1082         caps = gst_pad_get_caps (pad);
1083         str = gst_caps_get_structure (caps, 0);
1084         eDebug("gst new pad! %s", gst_structure_get_name (str));
1085
1086         if (!g_strrstr (gst_structure_get_name (str), "audio")) {
1087                 gst_caps_unref (caps);
1088                 gst_object_unref (audiopad);
1089                 return;
1090         }
1091
1092         gst_caps_unref (caps);
1093         gst_pad_link (pad, audiopad);
1094 }
1095
1096 void eServiceMP3::gstCBunknownType(GstElement *decodebin, GstPad *pad, GstCaps *caps, gpointer user_data)
1097 {
1098         GstStructure *str;
1099
1100         /* check media type */
1101         caps = gst_pad_get_caps (pad);
1102         str = gst_caps_get_structure (caps, 0);
1103         eDebug("unknown type: %s - this can't be decoded.", gst_structure_get_name (str));
1104         gst_caps_unref (caps);
1105 }
1106
1107 void eServiceMP3::gstPoll(const int&)
1108 {
1109                 /* ok, we have a serious problem here. gstBusSyncHandler sends
1110                    us the wakup signal, but likely before it was posted.
1111                    the usleep, an EVIL HACK (DON'T DO THAT!!!) works around this.
1112
1113                    I need to understand the API a bit more to make this work
1114                    proplerly. */
1115         usleep(1);
1116
1117         GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline));
1118         GstMessage *message;
1119         while ((message = gst_bus_pop (bus)))
1120         {
1121                 gstBusCall(bus, message);
1122                 gst_message_unref (message);
1123         }
1124 }
1125
1126 eAutoInitPtr<eServiceFactoryMP3> init_eServiceFactoryMP3(eAutoInitNumbers::service+1, "eServiceFactoryMP3");
1127 #else
1128 #warning gstreamer not available, not building media player
1129 #endif
1130
1131 void eServiceMP3::gstCBsubtitleAvail(GstElement *element, GstBuffer *buffer, GstPad *pad, gpointer user_data)
1132 {
1133         const unsigned char *text = (unsigned char *)GST_BUFFER_DATA(buffer);
1134         eDebug("gstCBsubtitleAvail: %s",text);
1135         eServiceMP3 *_this = (eServiceMP3*)user_data;
1136         if ( _this->m_subtitle_widget )
1137         {
1138                 eDVBTeletextSubtitlePage page;
1139                 gRGB rgbcol(0xD0,0xD0,0xD0);
1140                 page.m_elements.push_back(eDVBTeletextSubtitlePageElement(rgbcol, (const char*)text));
1141                 (_this->m_subtitle_widget)->setPage(page);
1142         }
1143 }
1144
1145 RESULT eServiceMP3::enableSubtitles(eWidget *parent, ePyObject tuple)
1146 {
1147         eDebug("eServiceMP3::enableSubtitles");
1148
1149         ePyObject entry;
1150         int tuplesize = PyTuple_Size(tuple);
1151         int pid;
1152         gint nb_sources;
1153         GstPad *active_pad;
1154         GstElement *switch_subtitles = gst_bin_get_by_name(GST_BIN(m_gst_pipeline),"switch_subtitles");
1155
1156         if (!PyTuple_Check(tuple))
1157                 goto error_out;
1158         if (tuplesize < 1)
1159                 goto error_out;
1160         entry = PyTuple_GET_ITEM(tuple, 1);
1161         if (!PyInt_Check(entry))
1162                 goto error_out;
1163         pid = PyInt_AsLong(entry);
1164
1165         m_subtitle_widget = new eSubtitleWidget(parent);
1166         m_subtitle_widget->resize(parent->size()); /* full size */
1167
1168         if ( !switch_subtitles )
1169         {
1170                 eDebug("can't switch subtitle tracks! gst-plugin-selector needed");
1171                 return -2;
1172         }
1173         g_object_get (G_OBJECT (switch_subtitles), "n-pads", &nb_sources, NULL);
1174         if ( (unsigned int)pid >= m_subtitleStreams.size() || pid >= nb_sources || (unsigned int)m_currentSubtitleStream >= m_subtitleStreams.size() )
1175                 return -2;
1176         char sinkpad[8];
1177         sprintf(sinkpad, "sink%d", pid);
1178         g_object_set (G_OBJECT (switch_subtitles), "active-pad", gst_element_get_pad (switch_subtitles, sinkpad), NULL);
1179         g_object_get (G_OBJECT (switch_subtitles), "active-pad", &active_pad, NULL);
1180         gchar *name;
1181         name = gst_pad_get_name (active_pad);
1182         eDebug ("switched subtitles to (%s)", name);
1183         g_free(name);
1184         m_currentSubtitleStream = pid;
1185
1186         return 0;
1187 error_out:
1188         eDebug("enableSubtitles needs a tuple as 2nd argument!\n"
1189                 "for gst subtitles (2, subtitle_stream_count)");
1190         return -1;
1191 }
1192
1193 RESULT eServiceMP3::disableSubtitles(eWidget *parent)
1194 {
1195         eDebug("eServiceMP3::disableSubtitles");
1196         delete m_subtitle_widget;
1197         m_subtitle_widget = 0;
1198         return 0;
1199 }
1200
1201 PyObject *eServiceMP3::getCachedSubtitle()
1202 {
1203         eDebug("eServiceMP3::getCachedSubtitle");
1204         Py_RETURN_NONE;
1205 }
1206
1207 PyObject *eServiceMP3::getSubtitleList()
1208 {
1209         eDebug("eServiceMP3::getSubtitleList");
1210
1211         ePyObject l = PyList_New(0);
1212         int stream_count = 0;
1213
1214         for (std::vector<subtitleStream>::iterator IterSubtitleStream(m_subtitleStreams.begin()); IterSubtitleStream != m_subtitleStreams.end(); ++IterSubtitleStream)
1215         {
1216                 ePyObject tuple = PyTuple_New(5);
1217                 PyTuple_SET_ITEM(tuple, 0, PyInt_FromLong(2));
1218                 PyTuple_SET_ITEM(tuple, 1, PyInt_FromLong(stream_count));
1219                 PyTuple_SET_ITEM(tuple, 2, PyInt_FromLong(0));
1220                 PyTuple_SET_ITEM(tuple, 3, PyInt_FromLong(0));
1221                 PyTuple_SET_ITEM(tuple, 4, PyString_FromString((IterSubtitleStream->language_code).c_str()));
1222                 PyList_Append(l, tuple);
1223                 Py_DECREF(tuple);
1224                 stream_count++;
1225         }
1226
1227         return l;
1228 }