src/modules/gstreamer/emotion_sink.c

   1 #include <glib.h>
   2 #include <gst/gst.h>
   3 #include <gst/video/video.h>
   4 #include <gst/video/gstvideosink.h>
   5
   6 #include <Ecore.h>
   7
   8 #include "emotion_gstreamer.h"
   9
  10 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE("sink",
  11                                                                    GST_PAD_SINK, GST_PAD_ALWAYS,
  12                                                                    GST_STATIC_CAPS(GST_VIDEO_CAPS_BGRx ";" GST_VIDEO_CAPS_BGR ";" GST_VIDEO_CAPS_BGRA ";" GST_VIDEO_CAPS_YUV("{I420,YV12}")));
  13
  14
  15 GST_DEBUG_CATEGORY_STATIC(evas_video_sink_debug);
  16 #define GST_CAT_DEFAULT evas_video_sink_debug
  17
  18 enum {
  19   REPAINT_REQUESTED,
  20   LAST_SIGNAL
  21 };
  22
  23 enum {
  24   PROP_0,
  25   PROP_EVAS_OBJECT,
  26   PROP_WIDTH,
  27   PROP_HEIGHT,
  28   PROP_LAST,
  29 };
  30
  31 static guint evas_video_sink_signals[LAST_SIGNAL] = { 0, };
  32
  33 struct _EvasVideoSinkPrivate {
  34    Evas_Object *o;
  35    Ecore_Pipe *p;
  36
  37    int width;
  38    int height;
  39    GstVideoFormat format;
  40
  41    GMutex* buffer_mutex;
  42    GCond* data_cond;
  43
  44    GstBuffer *last_buffer; /* We need to keep a copy of the last inserted buffer as evas doesn't copy YUV data around */
  45
  46    // If this is TRUE all processing should finish ASAP
  47    // This is necessary because there could be a race between
  48    // unlock() and render(), where unlock() wins, signals the
  49    // GCond, then render() tries to render a frame although
  50    // everything else isn't running anymore. This will lead
  51    // to deadlocks because render() holds the stream lock.
  52    //
  53    // Protected by the buffer mutex
  54    Eina_Bool unlocked : 1;
  55    Eina_Bool preroll : 1;
  56    Eina_Bool update_size : 1;
  57 };
  58
  59 #define _do_init(bla)                                   \
  60   GST_DEBUG_CATEGORY_INIT(evas_video_sink_debug,        \
  61                           "emotion-sink",               \
  62                           0,                            \
  63                           "emotion video sink")
  64
  65 GST_BOILERPLATE_FULL(EvasVideoSink,
  66                      evas_video_sink,
  67                      GstVideoSink,
  68                      GST_TYPE_VIDEO_SINK,
  69                      _do_init);
  70
  71
  72 static void unlock_buffer_mutex(EvasVideoSinkPrivate* priv);
  73
  74 static void evas_video_sink_render_handler(void *data, void *buf, unsigned int len);
  75
  76 static void
  77 evas_video_sink_base_init(gpointer g_class)
  78 {
  79    GstElementClass* element_class;
  80
  81    element_class = GST_ELEMENT_CLASS(g_class);
  82    gst_element_class_add_pad_template(element_class, gst_static_pad_template_get(&sinktemplate));
  83    gst_element_class_set_details_simple(element_class, "Evas video sink",
  84                                         "Sink/Video", "Sends video data from a GStreamer pipeline to an Evas object",
  85                                         "Vincent Torri <vtorri@univ-evry.fr>");
  86 }
  87
  88 static void
  89 evas_video_sink_init(EvasVideoSink* sink, EvasVideoSinkClass* klass __UNUSED__)
  90 {
  91    EvasVideoSinkPrivate* priv;
  92
  93    sink->priv = priv = G_TYPE_INSTANCE_GET_PRIVATE(sink, EVAS_TYPE_VIDEO_SINK, EvasVideoSinkPrivate);
  94    priv->o = NULL;
  95    priv->p = ecore_pipe_add(evas_video_sink_render_handler, sink);
  96    priv->last_buffer = NULL;
  97    priv->width = 0;
  98    priv->height = 0;
  99    priv->format = GST_VIDEO_FORMAT_UNKNOWN;
 100    priv->data_cond = g_cond_new();
 101    priv->buffer_mutex = g_mutex_new();
 102    priv->preroll = EINA_FALSE;
 103    priv->unlocked = EINA_FALSE;
 104    priv->update_size = EINA_TRUE;
 105 }
 106
 107
 108 /**** Object methods ****/
 109
 110 static void
 111 evas_video_sink_set_property(GObject * object, guint prop_id,
 112                              const GValue * value, GParamSpec * pspec)
 113 {
 114    EvasVideoSink* sink;
 115    EvasVideoSinkPrivate* priv;
 116
 117    sink = EVAS_VIDEO_SINK (object);
 118    priv = sink->priv;
 119
 120    switch (prop_id) {
 121     case PROP_EVAS_OBJECT:
 122        g_mutex_lock(priv->buffer_mutex);
 123        priv->o = g_value_get_pointer (value);
 124        g_mutex_unlock(priv->buffer_mutex);
 125        break;
 126     default:
 127        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 128        break;
 129    }
 130 }
 131
 132 static void
 133 evas_video_sink_get_property(GObject * object, guint prop_id,
 134                              GValue * value, GParamSpec * pspec)
 135 {
 136    EvasVideoSink* sink;
 137    EvasVideoSinkPrivate* priv;
 138
 139    sink = EVAS_VIDEO_SINK (object);
 140    priv = sink->priv;
 141
 142    switch (prop_id) {
 143     case PROP_EVAS_OBJECT:
 144        g_mutex_lock(priv->buffer_mutex);
 145        g_value_set_pointer (value, priv->o);
 146        g_mutex_unlock(priv->buffer_mutex);
 147        break;
 148     case PROP_WIDTH:
 149        g_mutex_lock(priv->buffer_mutex);
 150        g_value_set_int(value, priv->width);
 151        g_mutex_unlock(priv->buffer_mutex);
 152        break;
 153     case PROP_HEIGHT:
 154        g_mutex_lock(priv->buffer_mutex);
 155        g_value_set_int (value, priv->height);
 156        g_mutex_unlock(priv->buffer_mutex);
 157        break;
 158     default:
 159        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 160        break;
 161    }
 162 }
 163
 164 static void
 165 evas_video_sink_dispose(GObject* object)
 166 {
 167    EvasVideoSink* sink;
 168    EvasVideoSinkPrivate* priv;
 169
 170    sink = EVAS_VIDEO_SINK(object);
 171    priv = sink->priv;
 172
 173    if (priv->buffer_mutex) {
 174       g_mutex_free(priv->buffer_mutex);
 175       priv->buffer_mutex = 0;
 176    }
 177
 178    if (priv->data_cond) {
 179       g_cond_free(priv->data_cond);
 180       priv->data_cond = 0;
 181    }
 182
 183    if (priv->p) {
 184       ecore_pipe_del(priv->p);
 185       priv->p = NULL;
 186    }
 187
 188    if (priv->last_buffer) {
 189       gst_buffer_unref(priv->last_buffer);
 190       priv->last_buffer = NULL;
 191    }
 192
 193    G_OBJECT_CLASS(parent_class)->dispose(object);
 194 }
 195
 196
 197 /**** BaseSink methods ****/
 198
 199 gboolean evas_video_sink_set_caps(GstBaseSink *bsink, GstCaps *caps)
 200 {
 201    EvasVideoSink* sink;
 202    EvasVideoSinkPrivate* priv;
 203    int width;
 204    int height;
 205
 206    sink = EVAS_VIDEO_SINK(bsink);
 207    priv = sink->priv;
 208
 209    if (G_UNLIKELY(!gst_video_format_parse_caps(caps, &priv->format, &width, &height))) {
 210       return FALSE;
 211    }
 212
 213    if ((width != priv->width) || (height != priv->height))
 214      {
 215         priv->width = width;
 216         priv->height = height;
 217         priv->update_size = EINA_TRUE;
 218      }
 219
 220    printf("format :");
 221    switch (priv->format)
 222      {
 223       case GST_VIDEO_FORMAT_I420:
 224          evas_object_image_size_set(priv->o, priv->width, priv->height);
 225          evas_object_image_fill_set(priv->o, 0, 0, priv->width, priv->height);
 226          evas_object_image_colorspace_set(priv->o, EVAS_COLORSPACE_YCBCR422P601_PL);
 227          evas_object_image_alpha_set(priv->o, 0);
 228          printf ("I420\n");
 229          break;
 230       case GST_VIDEO_FORMAT_YV12:
 231          evas_object_image_size_set(priv->o, priv->width, priv->height);
 232          evas_object_image_fill_set(priv->o, 0, 0, priv->width, priv->height);
 233          evas_object_image_colorspace_set(priv->o, EVAS_COLORSPACE_YCBCR422P601_PL);
 234          evas_object_image_alpha_set(priv->o, 0);
 235          printf ("YV12\n");
 236          break;
 237       case GST_VIDEO_FORMAT_BGR:
 238          printf ("BGR\n");
 239          break;
 240       case GST_VIDEO_FORMAT_BGRx:
 241          printf ("BGRx\n");
 242          break;
 243       case GST_VIDEO_FORMAT_BGRA:
 244          printf ("BGRA\n");
 245          break;
 246       default:
 247          printf ("unsupported : %d\n", priv->format);
 248          return FALSE;
 249      }
 250
 251    return TRUE;
 252 }
 253
 254 static gboolean
 255 evas_video_sink_start(GstBaseSink* base_sink)
 256 {
 257    EvasVideoSinkPrivate* priv;
 258    gboolean res = TRUE;
 259
 260    priv = EVAS_VIDEO_SINK(base_sink)->priv;
 261    g_mutex_lock(priv->buffer_mutex);
 262    if (!priv->o)
 263      res = FALSE;
 264    else
 265      {
 266         if (!priv->p)
 267           res = FALSE;
 268         else
 269           {
 270              priv->unlocked = EINA_FALSE;
 271           }
 272      }
 273    g_mutex_unlock(priv->buffer_mutex);
 274    return res;
 275 }
 276
 277 static gboolean
 278 evas_video_sink_stop(GstBaseSink* base_sink)
 279 {
 280    EvasVideoSinkPrivate* priv = EVAS_VIDEO_SINK(base_sink)->priv;
 281
 282    unlock_buffer_mutex(priv);
 283    return TRUE;
 284 }
 285
 286 static gboolean
 287 evas_video_sink_unlock(GstBaseSink* object)
 288 {
 289    EvasVideoSink* sink;
 290
 291    sink = EVAS_VIDEO_SINK(object);
 292
 293    unlock_buffer_mutex(sink->priv);
 294
 295    return GST_CALL_PARENT_WITH_DEFAULT(GST_BASE_SINK_CLASS, unlock,
 296                                        (object), TRUE);
 297 }
 298
 299 static gboolean
 300 evas_video_sink_unlock_stop(GstBaseSink* object)
 301 {
 302    EvasVideoSink* sink;
 303    EvasVideoSinkPrivate* priv;
 304
 305    sink = EVAS_VIDEO_SINK(object);
 306    priv = sink->priv;
 307
 308    g_mutex_lock(priv->buffer_mutex);
 309    priv->unlocked = FALSE;
 310    g_mutex_unlock(priv->buffer_mutex);
 311
 312    return GST_CALL_PARENT_WITH_DEFAULT(GST_BASE_SINK_CLASS, unlock_stop,
 313                                        (object), TRUE);
 314 }
 315
 316 static GstFlowReturn
 317 evas_video_sink_preroll(GstBaseSink* bsink, GstBuffer* buffer)
 318 {
 319    GstBuffer *send;
 320    EvasVideoSink* sink;
 321    EvasVideoSinkPrivate* priv;
 322
 323    sink = EVAS_VIDEO_SINK(bsink);
 324    priv = sink->priv;
 325
 326    send = gst_buffer_ref(buffer);
 327
 328    priv->preroll = EINA_TRUE;
 329
 330    ecore_pipe_write(priv->p, &send, sizeof(buffer));
 331    return GST_FLOW_OK;
 332 }
 333
 334 static GstFlowReturn
 335 evas_video_sink_render(GstBaseSink* bsink, GstBuffer* buffer)
 336 {
 337    GstBuffer *send;
 338    EvasVideoSink* sink;
 339    EvasVideoSinkPrivate* priv;
 340    Eina_Bool ret;
 341
 342    sink = EVAS_VIDEO_SINK(bsink);
 343    priv = sink->priv;
 344
 345    g_mutex_lock(priv->buffer_mutex);
 346
 347    if (priv->unlocked) {
 348       g_mutex_unlock(priv->buffer_mutex);
 349       return GST_FLOW_OK;
 350    }
 351
 352    priv->preroll = EINA_FALSE;
 353
 354    send = gst_buffer_ref(buffer);
 355    ret = ecore_pipe_write(priv->p, &send, sizeof(buffer));
 356    if (!ret)
 357      return GST_FLOW_ERROR;
 358
 359    g_cond_wait(priv->data_cond, priv->buffer_mutex);
 360    g_mutex_unlock(priv->buffer_mutex);
 361
 362    return GST_FLOW_OK;
 363 }
 364
 365 static void evas_video_sink_render_handler(void *data,
 366                                            void *buf,
 367                                            unsigned int len)
 368 {
 369    Emotion_Gstreamer_Video *ev;
 370    Emotion_Video_Stream *vstream;
 371    EvasVideoSink* sink;
 372    EvasVideoSinkPrivate* priv;
 373    GstBuffer* buffer;
 374    unsigned char *evas_data;
 375    const guint8 *gst_data;
 376    GstQuery *query;
 377    GstFormat fmt = GST_FORMAT_TIME;
 378    gint64 pos;
 379
 380    sink = (EvasVideoSink *)data;
 381    priv = sink->priv;
 382
 383    buffer = *((GstBuffer **)buf);
 384
 385    if (priv->unlocked)
 386      goto exit_point;
 387
 388    gst_data = GST_BUFFER_DATA(buffer);
 389    if (!gst_data) goto exit_point;
 390    if (priv->update_size)
 391      {
 392         evas_object_image_size_set(priv->o, priv->width, priv->height);
 393         if (!priv->preroll) priv->update_size = FALSE;
 394      }
 395
 396    evas_data = (unsigned char *)evas_object_image_data_get(priv->o, 1);
 397
 398    // Evas's BGRA has pre-multiplied alpha while GStreamer's doesn't.
 399    // Here we convert to Evas's BGRA.
 400    if (priv->format == GST_VIDEO_FORMAT_BGR) {
 401       unsigned char *evas_tmp;
 402       int x;
 403       int y;
 404
 405       evas_tmp = evas_data;
 406       /* FIXME: could this be optimized ? */
 407       for (x = 0; x < priv->height; x++) {
 408          for (y = 0; y < priv->width; y++) {
 409             evas_tmp[0] = gst_data[0];
 410             evas_tmp[1] = gst_data[1];
 411             evas_tmp[2] = gst_data[2];
 412             evas_tmp[3] = 255;
 413             gst_data += 3;
 414             evas_tmp += 4;
 415          }
 416       }
 417    }
 418
 419    // Evas's BGRA has pre-multiplied alpha while GStreamer's doesn't.
 420    // Here we convert to Evas's BGRA.
 421    if (priv->format == GST_VIDEO_FORMAT_BGRx) {
 422       unsigned char *evas_tmp;
 423       int x;
 424       int y;
 425
 426       evas_tmp = evas_data;
 427       /* FIXME: could this be optimized ? */
 428       for (x = 0; x < priv->height; x++) {
 429          for (y = 0; y < priv->width; y++) {
 430             evas_tmp[0] = gst_data[0];
 431             evas_tmp[1] = gst_data[1];
 432             evas_tmp[2] = gst_data[2];
 433             evas_tmp[3] = 255;
 434             gst_data += 4;
 435             evas_tmp += 4;
 436          }
 437       }
 438    }
 439
 440    // Evas's BGRA has pre-multiplied alpha while GStreamer's doesn't.
 441    // Here we convert to Evas's BGRA.
 442    if (priv->format == GST_VIDEO_FORMAT_BGRA) {
 443       unsigned char *evas_tmp;
 444       int x;
 445       int y;
 446       unsigned char alpha;
 447
 448       evas_tmp = evas_data;
 449       /* FIXME: could this be optimized ? */
 450       for (x = 0; x < priv->height; x++) {
 451          for (y = 0; y < priv->width; y++) {
 452             alpha = gst_data[3];
 453             evas_tmp[0] = (gst_data[0] * alpha) / 255;
 454             evas_tmp[1] = (gst_data[1] * alpha) / 255;
 455             evas_tmp[2] = (gst_data[2] * alpha) / 255;
 456             evas_tmp[3] = alpha;
 457             gst_data += 4;
 458             evas_tmp += 4;
 459          }
 460       }
 461    }
 462
 463    if (priv->format == GST_VIDEO_FORMAT_I420) {
 464       int i;
 465       unsigned char **rows;
 466
 467       evas_object_image_pixels_dirty_set(priv->o, 1);
 468       rows = (unsigned char **)evas_data;
 469
 470       for (i = 0; i < priv->height; i++)
 471         rows[i] = &gst_data[i * priv->width];
 472
 473       rows += priv->height;
 474       for (i = 0; i < (priv->height / 2); i++)
 475         rows[i] = &gst_data[priv->height * priv->width + i * (priv->width / 2)];
 476
 477       rows += priv->height / 2;
 478       for (i = 0; i < (priv->height / 2); i++)
 479         rows[i] = &gst_data[priv->height * priv->width + priv->height * (priv->width /4) + i * (priv->width / 2)];
 480    }
 481
 482    if (priv->format == GST_VIDEO_FORMAT_YV12) {
 483       int i;
 484       unsigned char **rows;
 485
 486       evas_object_image_pixels_dirty_set(priv->o, 1);
 487
 488       rows = (unsigned char **)evas_data;
 489
 490       for (i = 0; i < priv->height; i++)
 491         rows[i] = &gst_data[i * priv->width];
 492
 493       rows += priv->height;
 494       for (i = 0; i < (priv->height / 2); i++)
 495         rows[i] = &gst_data[priv->height * priv->width + priv->height * (priv->width /4) + i * (priv->width / 2)];
 496
 497       rows += priv->height / 2;
 498       for (i = 0; i < (priv->height / 2); i++)
 499         rows[i] = &gst_data[priv->height * priv->width + i * (priv->width / 2)];
 500    }
 501
 502    evas_object_image_data_update_add(priv->o, 0, 0, priv->width, priv->height);
 503    evas_object_image_data_set(priv->o, evas_data);
 504    evas_object_image_pixels_dirty_set(priv->o, 0);
 505
 506    ev = evas_object_data_get(priv->o, "_emotion_gstreamer_video");
 507    _emotion_frame_new(ev->obj);
 508
 509    vstream = eina_list_nth(ev->video_streams, ev->video_stream_nbr - 1);
 510
 511    gst_element_query_position(ev->pipeline, &fmt, &pos);
 512    ev->position = (double)pos / (double)GST_SECOND;
 513
 514    vstream->width = priv->width;
 515    vstream->height = priv->height;
 516    ev->ratio = (double) priv->width / (double) priv->height;
 517
 518    _emotion_video_pos_update(ev->obj, ev->position, vstream->length_time);
 519    _emotion_frame_resize(ev->obj, priv->width, priv->height, ev->ratio);
 520
 521  exit_point:
 522    if (priv->last_buffer) gst_buffer_unref(priv->last_buffer);
 523    priv->last_buffer = buffer;
 524
 525    if (priv->preroll) return ;
 526
 527    g_mutex_lock(priv->buffer_mutex);
 528
 529    if (priv->unlocked) {
 530       g_mutex_unlock(priv->buffer_mutex);
 531       return;
 532    }
 533
 534    g_cond_signal(priv->data_cond);
 535    g_mutex_unlock(priv->buffer_mutex);
 536 }
 537
 538 static void
 539 unlock_buffer_mutex(EvasVideoSinkPrivate* priv)
 540 {
 541    g_mutex_lock(priv->buffer_mutex);
 542
 543    priv->unlocked = EINA_TRUE;
 544    g_cond_signal(priv->data_cond);
 545    g_mutex_unlock(priv->buffer_mutex);
 546 }
 547
 548 static void
 549 marshal_VOID__MINIOBJECT(GClosure * closure, GValue * return_value __UNUSED__,
 550                          guint n_param_values, const GValue * param_values,
 551                          gpointer invocation_hint __UNUSED__, gpointer marshal_data)
 552 {
 553    typedef void (*marshalfunc_VOID__MINIOBJECT) (gpointer obj, gpointer arg1, gpointer data2);
 554    marshalfunc_VOID__MINIOBJECT callback;
 555    GCClosure *cc;
 556    gpointer data1, data2;
 557
 558    cc = (GCClosure *) closure;
 559
 560    g_return_if_fail(n_param_values == 2);
 561
 562    if (G_CCLOSURE_SWAP_DATA(closure)) {
 563       data1 = closure->data;
 564       data2 = g_value_peek_pointer(param_values + 0);
 565    } else {
 566       data1 = g_value_peek_pointer(param_values + 0);
 567       data2 = closure->data;
 568    }
 569    callback = (marshalfunc_VOID__MINIOBJECT) (marshal_data ? marshal_data : cc->callback);
 570
 571    callback(data1, gst_value_get_mini_object(param_values + 1), data2);
 572 }
 573
 574 static void
 575 evas_video_sink_class_init(EvasVideoSinkClass* klass)
 576 {
 577    GObjectClass* gobject_class;
 578    GstBaseSinkClass* gstbase_sink_class;
 579
 580    gobject_class = G_OBJECT_CLASS(klass);
 581    gstbase_sink_class = GST_BASE_SINK_CLASS(klass);
 582
 583    g_type_class_add_private(klass, sizeof(EvasVideoSinkPrivate));
 584
 585    gobject_class->set_property = evas_video_sink_set_property;
 586    gobject_class->get_property = evas_video_sink_get_property;
 587
 588    g_object_class_install_property (gobject_class, PROP_EVAS_OBJECT,
 589                                     g_param_spec_pointer ("evas-object", "Evas Object",
 590                                                           "The Evas object where the display of the video will be done",
 591                                                           G_PARAM_READWRITE));
 592
 593    g_object_class_install_property (gobject_class, PROP_WIDTH,
 594                                     g_param_spec_int ("width", "Width",
 595                                                       "The width of the video",
 596                                                       0, 65536, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
 597
 598    g_object_class_install_property (gobject_class, PROP_HEIGHT,
 599                                     g_param_spec_int ("height", "Height",
 600                                                       "The height of the video",
 601                                                       0, 65536, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
 602
 603    gobject_class->dispose = evas_video_sink_dispose;
 604
 605    gstbase_sink_class->set_caps = evas_video_sink_set_caps;
 606    gstbase_sink_class->stop = evas_video_sink_stop;
 607    gstbase_sink_class->start = evas_video_sink_start;
 608    gstbase_sink_class->unlock = evas_video_sink_unlock;
 609    gstbase_sink_class->unlock_stop = evas_video_sink_unlock_stop;
 610    gstbase_sink_class->render = evas_video_sink_render;
 611    gstbase_sink_class->preroll = evas_video_sink_preroll;
 612
 613    evas_video_sink_signals[REPAINT_REQUESTED] = g_signal_new("repaint-requested",
 614                                                              G_TYPE_FROM_CLASS(klass),
 615                                                              (GSignalFlags)(G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION),
 616                                                              0,
 617                                                              0,
 618                                                              0,
 619                                                              marshal_VOID__MINIOBJECT,
 620                                                              G_TYPE_NONE, 1, GST_TYPE_BUFFER);
 621 }
 622
 623 gboolean
 624 gstreamer_plugin_init (GstPlugin * plugin)
 625 {
 626    return gst_element_register (plugin,
 627                                 "emotion-sink",
 628                                 GST_RANK_NONE,
 629                                 EVAS_TYPE_VIDEO_SINK);
 630 }
 631
 632 GstElement *
 633 gstreamer_video_sink_new(Emotion_Gstreamer_Video *ev,
 634                          Evas_Object *o,
 635                          const char *uri)
 636 {
 637    GstElement *playbin;
 638    GstElement *sink;
 639    Evas_Object *obj;
 640    GstStateChangeReturn res;
 641
 642    obj = _emotion_image_get(o);
 643    if (!obj)
 644      {
 645         ERR("Not Evas_Object specified");
 646         return NULL;
 647      }
 648
 649    playbin = gst_element_factory_make("playbin2", "playbin");
 650    if (!playbin)
 651      {
 652         ERR("Unable to create 'playbin' GstElement.");
 653         return NULL;
 654      }
 655
 656    sink = gst_element_factory_make("emotion-sink", "sink");
 657    if (!sink)
 658      {
 659         ERR("Unable to create 'emotion-sink' GstElement.");
 660         goto unref_pipeline;
 661      }
 662
 663    g_object_set(G_OBJECT(playbin), "video-sink", sink, NULL);
 664    g_object_set(G_OBJECT(playbin), "uri", uri, NULL);
 665    g_object_set(G_OBJECT(sink), "evas-object", obj, NULL);
 666
 667    res = gst_element_set_state(playbin, GST_STATE_PAUSED);
 668    if (res == GST_STATE_CHANGE_FAILURE)
 669      {
 670         ERR("Unable to set GST_STATE_PAUSED.");
 671         goto unref_pipeline;
 672      }
 673
 674    res = gst_element_get_state(playbin, NULL, NULL, GST_CLOCK_TIME_NONE);
 675    if (res != GST_STATE_CHANGE_SUCCESS)
 676      {
 677         ERR("Unable to get GST_CLOCK_TIME_NONE.");
 678         goto unref_pipeline;
 679      }
 680
 681    evas_object_data_set(obj, "_emotion_gstreamer_video", ev);
 682
 683    return playbin;
 684
 685  unref_pipeline:
 686    gst_object_unref(playbin);
 687    return NULL;
 688 }