lib/service/servicemp3.cpp

   1 #ifdef HAVE_GSTREAMER
   2
   3         /* note: this requires gstreamer 0.10.x and a big list of plugins. */
   4         /* it's currently hardcoded to use a big-endian alsasink as sink. */
   5 #include <lib/base/eerror.h>
   6 #include <lib/base/object.h>
   7 #include <lib/base/ebase.h>
   8 #include <string>
   9 #include <lib/service/servicemp3.h>
  10 #include <lib/service/service.h>
  11 #include <lib/base/init_num.h>
  12 #include <lib/base/init.h>
  13 #include <gst/gst.h>
  14
  15 // eServiceFactoryMP3
  16
  17 eServiceFactoryMP3::eServiceFactoryMP3()
  18 {
  19         ePtr<eServiceCenter> sc;
  20
  21         eServiceCenter::getPrivInstance(sc);
  22         if (sc)
  23                 sc->addServiceFactory(eServiceFactoryMP3::id, this);
  24
  25         m_service_info = new eStaticServiceMP3Info();
  26 }
  27
  28 eServiceFactoryMP3::~eServiceFactoryMP3()
  29 {
  30         ePtr<eServiceCenter> sc;
  31
  32         eServiceCenter::getPrivInstance(sc);
  33         if (sc)
  34                 sc->removeServiceFactory(eServiceFactoryMP3::id);
  35 }
  36
  37 DEFINE_REF(eServiceFactoryMP3)
  38
  39         // iServiceHandler
  40 RESULT eServiceFactoryMP3::play(const eServiceReference &ref, ePtr<iPlayableService> &ptr)
  41 {
  42                 // check resources...
  43         ptr = new eServiceMP3(ref.path.c_str());
  44         return 0;
  45 }
  46
  47 RESULT eServiceFactoryMP3::record(const eServiceReference &ref, ePtr<iRecordableService> &ptr)
  48 {
  49         ptr=0;
  50         return -1;
  51 }
  52
  53 RESULT eServiceFactoryMP3::list(const eServiceReference &, ePtr<iListableService> &ptr)
  54 {
  55         ptr=0;
  56         return -1;
  57 }
  58
  59 RESULT eServiceFactoryMP3::info(const eServiceReference &ref, ePtr<iStaticServiceInformation> &ptr)
  60 {
  61         ptr = m_service_info;
  62         return 0;
  63 }
  64
  65 RESULT eServiceFactoryMP3::offlineOperations(const eServiceReference &, ePtr<iServiceOfflineOperations> &ptr)
  66 {
  67         ptr = 0;
  68         return -1;
  69 }
  70
  71
  72 // eStaticServiceMP3Info
  73
  74
  75 // eStaticServiceMP3Info is seperated from eServiceMP3 to give information
  76 // about unopened files.
  77
  78 // probably eServiceMP3 should use this class as well, and eStaticServiceMP3Info
  79 // should have a database backend where ID3-files etc. are cached.
  80 // this would allow listing the mp3 database based on certain filters.
  81
  82 DEFINE_REF(eStaticServiceMP3Info)
  83
  84 eStaticServiceMP3Info::eStaticServiceMP3Info()
  85 {
  86 }
  87
  88 RESULT eStaticServiceMP3Info::getName(const eServiceReference &ref, std::string &name)
  89 {
  90         size_t last = ref.path.rfind('/');
  91         if (last != std::string::npos)
  92                 name = ref.path.substr(last+1);
  93         else
  94                 name = ref.path;
  95         return 0;
  96 }
  97
  98 int eStaticServiceMP3Info::getLength(const eServiceReference &ref)
  99 {
 100         return -1;
 101 }
 102
 103 // eServiceMP3
 104
 105 eServiceMP3::eServiceMP3(const char *filename): m_filename(filename), m_pump(eApp, 1)
 106 {
 107         m_stream_tags = 0;
 108         CONNECT(m_pump.recv_msg, eServiceMP3::gstPoll);
 109         GstElement *source, *decoder, *conv, *flt, *sink;
 110         m_state = stIdle;
 111         eDebug("SERVICEMP3 construct!");
 112
 113         m_gst_pipeline = gst_pipeline_new ("audio-player");
 114         if (!m_gst_pipeline)
 115                 eWarning("failed to create pipeline");
 116
 117         source = gst_element_factory_make ("filesrc", "file-source");
 118         if (!source)
 119                 eWarning("failed to create filesrc");
 120
 121         decoder = gst_element_factory_make ("decodebin", "decoder");
 122         if (!decoder)
 123                 eWarning("failed to create decodebin decoder");
 124
 125         conv = gst_element_factory_make ("audioconvert", "converter");
 126         if (!conv)
 127                 eWarning("failed to create audioconvert");
 128
 129         flt = gst_element_factory_make ("capsfilter", "flt");
 130         if (!flt)
 131                 eWarning("failed to create capsfilter");
 132
 133                 /* workaround for [3des]' driver bugs: */
 134         if (flt)
 135         {
 136                 GstCaps *caps = gst_caps_new_simple("audio/x-raw-int", "endianness", G_TYPE_INT, 4321, 0);
 137                 g_object_set (G_OBJECT (flt), "caps", caps, 0);
 138                 gst_caps_unref(caps);
 139         }
 140
 141         sink = gst_element_factory_make ("alsasink", "alsa-output");
 142         if (!sink)
 143                 eWarning("failed to create osssink");
 144
 145         if (m_gst_pipeline && source && decoder && conv && sink)
 146         {
 147                 gst_bus_set_sync_handler(gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline)), gstBusSyncHandler, this);
 148
 149                 g_object_set (G_OBJECT (source), "location", filename, NULL);
 150                 g_signal_connect (decoder, "new-decoded-pad", G_CALLBACK(gstCBnewPad), this);
 151
 152                         /* gst_bin will take the 'floating references' */
 153                 gst_bin_add_many (GST_BIN (m_gst_pipeline),
 154                                         source, decoder, NULL);
 155
 156                 gst_element_link(source, decoder);
 157
 158                         /* create audio bin */
 159                 m_gst_audio = gst_bin_new ("audiobin");
 160                 GstPad *audiopad = gst_element_get_pad (conv, "sink");
 161
 162                 gst_bin_add_many(GST_BIN(m_gst_audio), conv, flt, sink, 0);
 163                 gst_element_link_many(conv, flt, sink, 0);
 164                 gst_element_add_pad(m_gst_audio, gst_ghost_pad_new ("sink", audiopad));
 165                 gst_object_unref(audiopad);
 166
 167                 gst_bin_add (GST_BIN(m_gst_pipeline), m_gst_audio);
 168         } else
 169         {
 170                 if (m_gst_pipeline)
 171                         gst_object_unref(GST_OBJECT(m_gst_pipeline));
 172                 if (source)
 173                         gst_object_unref(GST_OBJECT(source));
 174                 if (decoder)
 175                         gst_object_unref(GST_OBJECT(decoder));
 176                 if (conv)
 177                         gst_object_unref(GST_OBJECT(conv));
 178                 if (sink)
 179                         gst_object_unref(GST_OBJECT(sink));
 180                 eDebug("sorry, can't play.");
 181         }
 182
 183         gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 184 }
 185
 186 eServiceMP3::~eServiceMP3()
 187 {
 188         if (m_state == stRunning)
 189                 stop();
 190
 191         if (m_stream_tags)
 192                 gst_tag_list_free(m_stream_tags);
 193
 194         if (m_gst_pipeline)
 195         {
 196                 gst_object_unref (GST_OBJECT (m_gst_pipeline));
 197                 eDebug("SERVICEMP3 destruct!");
 198         }
 199 }
 200
 201 DEFINE_REF(eServiceMP3);
 202
 203 RESULT eServiceMP3::connectEvent(const Slot2<void,iPlayableService*,int> &event, ePtr<eConnection> &connection)
 204 {
 205         connection = new eConnection((iPlayableService*)this, m_event.connect(event));
 206         return 0;
 207 }
 208
 209 RESULT eServiceMP3::start()
 210 {
 211         assert(m_state == stIdle);
 212
 213         m_state = stRunning;
 214         if (m_gst_pipeline)
 215         {
 216                 eDebug("starting pipeline");
 217                 gst_element_set_state (m_gst_pipeline, GST_STATE_PLAYING);
 218         }
 219         m_event(this, evStart);
 220         return 0;
 221 }
 222
 223 RESULT eServiceMP3::stop()
 224 {
 225         assert(m_state != stIdle);
 226         if (m_state == stStopped)
 227                 return -1;
 228         printf("MP3: %s stop\n", m_filename.c_str());
 229         gst_element_set_state(m_gst_pipeline, GST_STATE_NULL);
 230         m_state = stStopped;
 231         return 0;
 232 }
 233
 234 RESULT eServiceMP3::setTarget(int target)
 235 {
 236         return -1;
 237 }
 238
 239 RESULT eServiceMP3::pause(ePtr<iPauseableService> &ptr)
 240 {
 241         ptr=this;
 242         return 0;
 243 }
 244
 245 RESULT eServiceMP3::setSlowMotion(int ratio)
 246 {
 247         return -1;
 248 }
 249
 250 RESULT eServiceMP3::setFastForward(int ratio)
 251 {
 252         return -1;
 253 }
 254
 255                 // iPausableService
 256 RESULT eServiceMP3::pause()
 257 {
 258         if (!m_gst_pipeline)
 259                 return -1;
 260         gst_element_set_state(m_gst_pipeline, GST_STATE_PAUSED);
 261         return 0;
 262 }
 263
 264 RESULT eServiceMP3::unpause()
 265 {
 266         if (!m_gst_pipeline)
 267                 return -1;
 268         gst_element_set_state(m_gst_pipeline, GST_STATE_PLAYING);
 269         return 0;
 270 }
 271
 272         /* iSeekableService */
 273 RESULT eServiceMP3::seek(ePtr<iSeekableService> &ptr)
 274 {
 275         ptr = this;
 276         return 0;
 277 }
 278
 279 RESULT eServiceMP3::getLength(pts_t &pts)
 280 {
 281         if (!m_gst_pipeline)
 282                 return -1;
 283         if (m_state != stRunning)
 284                 return -1;
 285
 286         GstFormat fmt = GST_FORMAT_TIME;
 287         gint64 len;
 288
 289         if (!gst_element_query_duration(m_gst_pipeline, &fmt, &len))
 290                 return -1;
 291
 292                 /* len is in nanoseconds. we have 90 000 pts per second. */
 293
 294         pts = len / 11111;
 295         return 0;
 296 }
 297
 298 RESULT eServiceMP3::seekTo(pts_t to)
 299 {
 300         if (!m_gst_pipeline)
 301                 return -1;
 302
 303                 /* convert pts to nanoseconds */
 304         gint64 time_nanoseconds = to * 11111LL;
 305         if (!gst_element_seek (m_gst_pipeline, 1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_FLUSH,
 306                 GST_SEEK_TYPE_SET, time_nanoseconds,
 307                 GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE))
 308         {
 309                 eDebug("SEEK failed");
 310                 return -1;
 311         }
 312         return 0;
 313 }
 314
 315 RESULT eServiceMP3::seekRelative(int direction, pts_t to)
 316 {
 317         if (!m_gst_pipeline)
 318                 return -1;
 319
 320         pause();
 321
 322         pts_t ppos;
 323         getPlayPosition(ppos);
 324         ppos += to * direction;
 325         if (ppos < 0)
 326                 ppos = 0;
 327         seekTo(ppos);
 328
 329         unpause();
 330
 331         return 0;
 332 }
 333
 334 RESULT eServiceMP3::getPlayPosition(pts_t &pts)
 335 {
 336         if (!m_gst_pipeline)
 337                 return -1;
 338         if (m_state != stRunning)
 339                 return -1;
 340
 341         GstFormat fmt = GST_FORMAT_TIME;
 342         gint64 len;
 343
 344         if (!gst_element_query_position(m_gst_pipeline, &fmt, &len))
 345                 return -1;
 346
 347                 /* len is in nanoseconds. we have 90 000 pts per second. */
 348         pts = len / 11111;
 349         return 0;
 350 }
 351
 352 RESULT eServiceMP3::setTrickmode(int trick)
 353 {
 354                 /* trickmode currently doesn't make any sense for us. */
 355         return -1;
 356 }
 357
 358 RESULT eServiceMP3::isCurrentlySeekable()
 359 {
 360         return 1;
 361 }
 362
 363 RESULT eServiceMP3::info(ePtr<iServiceInformation>&i)
 364 {
 365         i = this;
 366         return 0;
 367 }
 368
 369 RESULT eServiceMP3::getName(std::string &name)
 370 {
 371         name = "MP3 File: " + m_filename;
 372         return 0;
 373 }
 374
 375 int eServiceMP3::getInfo(int w)
 376 {
 377         switch (w)
 378         {
 379         case sTitle:
 380         case sArtist:
 381         case sAlbum:
 382         case sComment:
 383         case sTracknumber:
 384         case sGenre:
 385                 return resIsString;
 386
 387         default:
 388                 return resNA;
 389         }
 390 }
 391
 392 std::string eServiceMP3::getInfoString(int w)
 393 {
 394         gchar *tag = 0;
 395         switch (w)
 396         {
 397         case sTitle:
 398                 tag = GST_TAG_TITLE;
 399                 break;
 400         case sArtist:
 401                 tag = GST_TAG_ARTIST;
 402                 break;
 403         case sAlbum:
 404                 tag = GST_TAG_ALBUM;
 405                 break;
 406         case sComment:
 407                 tag = GST_TAG_COMMENT;
 408                 break;
 409         case sTracknumber:
 410                 tag = GST_TAG_TRACK_NUMBER;
 411                 break;
 412         case sGenre:
 413                 tag = GST_TAG_GENRE;
 414                 break;
 415         default:
 416                 return "";
 417         }
 418
 419         if (!m_stream_tags || !tag)
 420                 return "";
 421
 422         gchar *value;
 423
 424         if (gst_tag_list_get_string(m_stream_tags, tag, &value))
 425         {
 426                 std::string res = value;
 427                 g_free(value);
 428                 return res;
 429         }
 430
 431         return "";
 432 }
 433
 434
 435                 void foreach(const GstTagList *list, const gchar *tag, gpointer user_data)
 436                 {
 437                         if (tag)
 438                                 eDebug("Tag: %c%c%c%c", tag[0], tag[1], tag[2], tag[3]);
 439
 440                 }
 441
 442 void eServiceMP3::gstBusCall(GstBus *bus, GstMessage *msg)
 443 {
 444         gchar *string = gst_structure_to_string(gst_message_get_structure(msg));
 445         eDebug("gst_message: %s", string);
 446         g_free(string);
 447
 448
 449         switch (GST_MESSAGE_TYPE (msg))
 450         {
 451         case GST_MESSAGE_EOS:
 452                 m_event((iPlayableService*)this, evEOF);
 453                 break;
 454         case GST_MESSAGE_ERROR:
 455         {
 456                 gchar *debug;
 457                 GError *err;
 458                 gst_message_parse_error (msg, &err, &debug);
 459                 g_free (debug);
 460                 eWarning("Gstreamer error: %s", err->message);
 461                 g_error_free(err);
 462                 exit(0);
 463                 break;
 464         }
 465         case GST_MESSAGE_TAG:
 466         {
 467                 GstTagList *tags, *result;
 468                 gst_message_parse_tag(msg, &tags);
 469
 470                 result = gst_tag_list_merge(m_stream_tags, tags, GST_TAG_MERGE_PREPEND);
 471                 if (result)
 472                 {
 473                         if (m_stream_tags)
 474                                 gst_tag_list_free(m_stream_tags);
 475                         m_stream_tags = result;
 476                 }
 477                 gst_tag_list_free(tags);
 478                 break;
 479         }
 480         default:
 481                 break;
 482         }
 483 }
 484
 485 GstBusSyncReply eServiceMP3::gstBusSyncHandler(GstBus *bus, GstMessage *message, gpointer user_data)
 486 {
 487         eServiceMP3 *_this = (eServiceMP3*)user_data;
 488         _this->m_pump.send(1);
 489                 /* wake */
 490         return GST_BUS_PASS;
 491 }
 492
 493 void eServiceMP3::gstCBnewPad(GstElement *decodebin, GstPad *pad, gboolean last, gpointer user_data)
 494 {
 495         eServiceMP3 *_this = (eServiceMP3*)user_data;
 496         GstCaps *caps;
 497         GstStructure *str;
 498         GstPad *audiopad;
 499
 500         /* only link once */
 501         audiopad = gst_element_get_pad (_this->m_gst_audio, "sink");
 502         if (GST_PAD_IS_LINKED (audiopad)) {
 503                 g_object_unref (audiopad);
 504                 return;
 505         }
 506
 507
 508         /* check media type */
 509         caps = gst_pad_get_caps (pad);
 510         str = gst_caps_get_structure (caps, 0);
 511         if (!g_strrstr (gst_structure_get_name (str), "audio")) {
 512                 gst_caps_unref (caps);
 513                 gst_object_unref (audiopad);
 514                 return;
 515         }
 516
 517         gst_caps_unref (caps);
 518         gst_pad_link (pad, audiopad);
 519 }
 520
 521
 522 void eServiceMP3::gstPoll(const int&)
 523 {
 524                 /* ok, we have a serious problem here. gstBusSyncHandler sends
 525                    us the wakup signal, but likely before it was posted.
 526                    the usleep, an EVIL HACK (DON'T DO THAT!!!) works around this.
 527
 528                    I need to understand the API a bit more to make this work
 529                    proplerly. */
 530         usleep(1);
 531
 532         GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (m_gst_pipeline));
 533         GstMessage *message;
 534         while (message = gst_bus_pop (bus))
 535         {
 536                 gstBusCall(bus, message);
 537                 gst_message_unref (message);
 538         }
 539 }
 540
 541 eAutoInitPtr<eServiceFactoryMP3> init_eServiceFactoryMP3(eAutoInitNumbers::service+1, "eServiceFactoryMP3");
 542 #else
 543 #warning gstreamer not available, not building media player
 544 #endif