Source/WebCore/platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp

   1 /*
   2  * Copyright (C) 2007, 2009 Apple Inc.  All rights reserved.
   3  * Copyright (C) 2007 Collabora Ltd.  All rights reserved.
   4  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
   5  * Copyright (C) 2009 Gustavo Noronha Silva <gns@gnome.org>
   6  * Copyright (C) 2009, 2010, 2011, 2012, 2013 Igalia S.L
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Library General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Library General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Library General Public License
  19  * aint with this library; see the file COPYING.LIB.  If not, write to
  20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21  * Boston, MA 02110-1301, USA.
  22  */
  23
  24 #include "config.h"
  25 #include "MediaPlayerPrivateGStreamer.h"
  26
  27 #if ENABLE(VIDEO) && USE(GSTREAMER)
  28
  29 #include "GStreamerUtilities.h"
  30 #include "GStreamerVersioning.h"
  31 #include "KURL.h"
  32 #include "Logging.h"
  33 #include "MIMETypeRegistry.h"
  34 #include "MediaPlayer.h"
  35 #include "NotImplemented.h"
  36 #include "SecurityOrigin.h"
  37 #include "TimeRanges.h"
  38 #include "WebKitWebSourceGStreamer.h"
  39 #include <gst/gst.h>
  40 #include <gst/pbutils/missing-plugins.h>
  41 #include <limits>
  42 #include <wtf/gobject/GOwnPtr.h>
  43 #include <wtf/text/CString.h>
  44
  45 #if ENABLE(VIDEO_TRACK) && defined(GST_API_VERSION_1)
  46 #include "InbandTextTrackPrivateGStreamer.h"
  47 #include "TextCombinerGStreamer.h"
  48 #include "TextSinkGStreamer.h"
  49 #endif
  50
  51 #ifdef GST_API_VERSION_1
  52 #include <gst/audio/streamvolume.h>
  53 #else
  54 #include <gst/interfaces/streamvolume.h>
  55 #endif
  56
  57 // GstPlayFlags flags from playbin2. It is the policy of GStreamer to
  58 // not publicly expose element-specific enums. That's why this
  59 // GstPlayFlags enum has been copied here.
  60 typedef enum {
  61     GST_PLAY_FLAG_VIDEO         = 0x00000001,
  62     GST_PLAY_FLAG_AUDIO         = 0x00000002,
  63     GST_PLAY_FLAG_TEXT          = 0x00000004,
  64     GST_PLAY_FLAG_VIS           = 0x00000008,
  65     GST_PLAY_FLAG_SOFT_VOLUME   = 0x00000010,
  66     GST_PLAY_FLAG_NATIVE_AUDIO  = 0x00000020,
  67     GST_PLAY_FLAG_NATIVE_VIDEO  = 0x00000040,
  68     GST_PLAY_FLAG_DOWNLOAD      = 0x00000080,
  69     GST_PLAY_FLAG_BUFFERING     = 0x000000100
  70 } GstPlayFlags;
  71
  72 // gPercentMax is used when parsing buffering ranges with
  73 // gst_query_parse_nth_buffering_range as there was a bug in GStreamer
  74 // 0.10 that was using 100 instead of GST_FORMAT_PERCENT_MAX. This was
  75 // corrected in 1.0. gst_query_parse_buffering_range worked as
  76 // expected with GST_FORMAT_PERCENT_MAX in both cases.
  77 #ifdef GST_API_VERSION_1
  78 static const char* gPlaybinName = "playbin";
  79 static const gint64 gPercentMax = GST_FORMAT_PERCENT_MAX;
  80 #else
  81 static const char* gPlaybinName = "playbin2";
  82 static const gint64 gPercentMax = 100;
  83 #endif
  84 // Max interval in seconds to stay in the READY state on manual
  85 // state change requests.
  86 static const guint gReadyStateTimerInterval = 60;
  87
  88 GST_DEBUG_CATEGORY_EXTERN(webkit_media_player_debug);
  89 #define GST_CAT_DEFAULT webkit_media_player_debug
  90
  91 using namespace std;
  92
  93 namespace WebCore {
  94
  95 static gboolean mediaPlayerPrivateMessageCallback(GstBus*, GstMessage* message, MediaPlayerPrivateGStreamer* player)
  96 {
  97     return player->handleMessage(message);
  98 }
  99
 100 static void mediaPlayerPrivateSourceChangedCallback(GObject*, GParamSpec*, MediaPlayerPrivateGStreamer* player)
 101 {
 102     player->sourceChanged();
 103 }
 104
 105 static void mediaPlayerPrivateVideoSinkCapsChangedCallback(GObject*, GParamSpec*, MediaPlayerPrivateGStreamer* player)
 106 {
 107     player->videoChanged();
 108 }
 109
 110 static void mediaPlayerPrivateVideoChangedCallback(GObject*, MediaPlayerPrivateGStreamer* player)
 111 {
 112     player->videoChanged();
 113 }
 114
 115 static void mediaPlayerPrivateAudioChangedCallback(GObject*, MediaPlayerPrivateGStreamer* player)
 116 {
 117     player->audioChanged();
 118 }
 119
 120 static gboolean mediaPlayerPrivateAudioChangeTimeoutCallback(MediaPlayerPrivateGStreamer* player)
 121 {
 122     // This is the callback of the timeout source created in ::audioChanged.
 123     player->notifyPlayerOfAudio();
 124     return FALSE;
 125 }
 126
 127 #ifdef GST_API_VERSION_1
 128 static void setAudioStreamPropertiesCallback(GstChildProxy*, GObject* object, gchar*,
 129     MediaPlayerPrivateGStreamer* player)
 130 #else
 131 static void setAudioStreamPropertiesCallback(GstChildProxy*, GObject* object, MediaPlayerPrivateGStreamer* player)
 132 #endif
 133 {
 134     player->setAudioStreamProperties(object);
 135 }
 136
 137 static gboolean mediaPlayerPrivateVideoChangeTimeoutCallback(MediaPlayerPrivateGStreamer* player)
 138 {
 139     // This is the callback of the timeout source created in ::videoChanged.
 140     player->notifyPlayerOfVideo();
 141     return FALSE;
 142 }
 143
 144 #if ENABLE(VIDEO_TRACK) && defined(GST_API_VERSION_1)
 145 static void mediaPlayerPrivateTextChangedCallback(GObject*, MediaPlayerPrivateGStreamer* player)
 146 {
 147     player->textChanged();
 148 }
 149
 150 static gboolean mediaPlayerPrivateTextChangeTimeoutCallback(MediaPlayerPrivateGStreamer* player)
 151 {
 152     // This is the callback of the timeout source created in ::textChanged.
 153     player->notifyPlayerOfText();
 154     return FALSE;
 155 }
 156
 157 static GstFlowReturn mediaPlayerPrivateNewTextSampleCallback(GObject*, MediaPlayerPrivateGStreamer* player)
 158 {
 159     player->newTextSample();
 160     return GST_FLOW_OK;
 161 }
 162 #endif
 163
 164 static gboolean mediaPlayerPrivateReadyStateTimeoutCallback(MediaPlayerPrivateGStreamer* player)
 165 {
 166     // This is the callback of the timeout source created in ::changePipelineState.
 167     // Reset pipeline if we are sitting on READY state when timeout is reached
 168     player->changePipelineState(GST_STATE_NULL);
 169     return FALSE;
 170 }
 171
 172 static void mediaPlayerPrivatePluginInstallerResultFunction(GstInstallPluginsReturn result, gpointer userData)
 173 {
 174     MediaPlayerPrivateGStreamer* player = reinterpret_cast<MediaPlayerPrivateGStreamer*>(userData);
 175     player->handlePluginInstallerResult(result);
 176 }
 177
 178 static GstClockTime toGstClockTime(float time)
 179 {
 180     // Extract the integer part of the time (seconds) and the fractional part (microseconds). Attempt to
 181     // round the microseconds so no floating point precision is lost and we can perform an accurate seek.
 182     float seconds;
 183     float microSeconds = modf(time, &seconds) * 1000000;
 184     GTimeVal timeValue;
 185     timeValue.tv_sec = static_cast<glong>(seconds);
 186     timeValue.tv_usec = static_cast<glong>(roundf(microSeconds / 10000) * 10000);
 187     return GST_TIMEVAL_TO_TIME(timeValue);
 188 }
 189
 190 void MediaPlayerPrivateGStreamer::setAudioStreamProperties(GObject* object)
 191 {
 192     if (g_strcmp0(G_OBJECT_TYPE_NAME(object), "GstPulseSink"))
 193         return;
 194
 195     const char* role = m_player->mediaPlayerClient() && m_player->mediaPlayerClient()->mediaPlayerIsVideo()
 196         ? "video" : "music";
 197     GstStructure* structure = gst_structure_new("stream-properties", "media.role", G_TYPE_STRING, role, NULL);
 198     g_object_set(object, "stream-properties", structure, NULL);
 199     gst_structure_free(structure);
 200     GOwnPtr<gchar> elementName(gst_element_get_name(GST_ELEMENT(object)));
 201     LOG_MEDIA_MESSAGE("Set media.role as %s at %s", role, elementName.get());
 202 }
 203
 204 PassOwnPtr<MediaPlayerPrivateInterface> MediaPlayerPrivateGStreamer::create(MediaPlayer* player)
 205 {
 206     return adoptPtr(new MediaPlayerPrivateGStreamer(player));
 207 }
 208
 209 void MediaPlayerPrivateGStreamer::registerMediaEngine(MediaEngineRegistrar registrar)
 210 {
 211     if (isAvailable())
 212         registrar(create, getSupportedTypes, supportsType, 0, 0, 0);
 213 }
 214
 215 bool initializeGStreamerAndRegisterWebKitElements()
 216 {
 217     if (!initializeGStreamer())
 218         return false;
 219
 220     GRefPtr<GstElementFactory> srcFactory = gst_element_factory_find("webkitwebsrc");
 221     if (!srcFactory) {
 222         GST_DEBUG_CATEGORY_INIT(webkit_media_player_debug, "webkitmediaplayer", 0, "WebKit media player");
 223         return gst_element_register(0, "webkitwebsrc", GST_RANK_PRIMARY + 100, WEBKIT_TYPE_WEB_SRC);
 224     }
 225
 226     return true;
 227 }
 228
 229 bool MediaPlayerPrivateGStreamer::isAvailable()
 230 {
 231     if (!initializeGStreamerAndRegisterWebKitElements())
 232         return false;
 233
 234     GRefPtr<GstElementFactory> factory = gst_element_factory_find(gPlaybinName);
 235     return factory;
 236 }
 237
 238 MediaPlayerPrivateGStreamer::MediaPlayerPrivateGStreamer(MediaPlayer* player)
 239     : MediaPlayerPrivateGStreamerBase(player)
 240     , m_source(0)
 241     , m_seekTime(0)
 242     , m_changingRate(false)
 243     , m_endTime(numeric_limits<float>::infinity())
 244     , m_isEndReached(false)
 245     , m_isStreaming(false)
 246     , m_mediaLocations(0)
 247     , m_mediaLocationCurrentIndex(0)
 248     , m_resetPipeline(false)
 249     , m_paused(true)
 250     , m_seeking(false)
 251     , m_seekIsPending(false)
 252     , m_timeOfOverlappingSeek(-1)
 253     , m_buffering(false)
 254     , m_playbackRate(1)
 255     , m_errorOccured(false)
 256     , m_mediaDuration(0)
 257     , m_downloadFinished(false)
 258     , m_fillTimer(this, &MediaPlayerPrivateGStreamer::fillTimerFired)
 259     , m_maxTimeLoaded(0)
 260     , m_bufferingPercentage(0)
 261     , m_preload(player->preload())
 262     , m_delayingLoad(false)
 263     , m_mediaDurationKnown(true)
 264     , m_maxTimeLoadedAtLastDidLoadingProgress(0)
 265     , m_volumeAndMuteInitialized(false)
 266     , m_hasVideo(false)
 267     , m_hasAudio(false)
 268     , m_audioTimerHandler(0)
 269     , m_textTimerHandler(0)
 270     , m_videoTimerHandler(0)
 271     , m_readyTimerHandler(0)
 272     , m_webkitAudioSink(0)
 273     , m_totalBytes(-1)
 274     , m_preservesPitch(false)
 275     , m_requestedState(GST_STATE_VOID_PENDING)
 276     , m_missingPlugins(false)
 277 {
 278 }
 279
 280 MediaPlayerPrivateGStreamer::~MediaPlayerPrivateGStreamer()
 281 {
 282 #if ENABLE(VIDEO_TRACK) && defined(GST_API_VERSION_1)
 283     for (size_t i = 0; i < m_textTracks.size(); ++i)
 284         m_textTracks[i]->disconnect();
 285 #endif
 286     if (m_fillTimer.isActive())
 287         m_fillTimer.stop();
 288
 289     if (m_mediaLocations) {
 290         gst_structure_free(m_mediaLocations);
 291         m_mediaLocations = 0;
 292     }
 293
 294     if (m_autoAudioSink)
 295         g_signal_handlers_disconnect_by_func(G_OBJECT(m_autoAudioSink.get()),
 296             reinterpret_cast<gpointer>(setAudioStreamPropertiesCallback), this);
 297
 298     if (m_readyTimerHandler)
 299         g_source_remove(m_readyTimerHandler);
 300
 301     if (m_playBin) {
 302         GRefPtr<GstBus> bus = webkitGstPipelineGetBus(GST_PIPELINE(m_playBin.get()));
 303         ASSERT(bus);
 304         g_signal_handlers_disconnect_by_func(bus.get(), reinterpret_cast<gpointer>(mediaPlayerPrivateMessageCallback), this);
 305         gst_bus_remove_signal_watch(bus.get());
 306
 307         g_signal_handlers_disconnect_by_func(m_playBin.get(), reinterpret_cast<gpointer>(mediaPlayerPrivateSourceChangedCallback), this);
 308         g_signal_handlers_disconnect_by_func(m_playBin.get(), reinterpret_cast<gpointer>(mediaPlayerPrivateVideoChangedCallback), this);
 309         g_signal_handlers_disconnect_by_func(m_playBin.get(), reinterpret_cast<gpointer>(mediaPlayerPrivateAudioChangedCallback), this);
 310 #if ENABLE(VIDEO_TRACK) && defined(GST_API_VERSION_1)
 311         g_signal_handlers_disconnect_by_func(m_playBin.get(), reinterpret_cast<gpointer>(mediaPlayerPrivateNewTextSampleCallback), this);
 312         g_signal_handlers_disconnect_by_func(m_playBin.get(), reinterpret_cast<gpointer>(mediaPlayerPrivateTextChangedCallback), this);
 313 #endif
 314
 315         gst_element_set_state(m_playBin.get(), GST_STATE_NULL);
 316         m_playBin.clear();
 317     }
 318
 319     GRefPtr<GstPad> videoSinkPad = adoptGRef(gst_element_get_static_pad(m_webkitVideoSink.get(), "sink"));
 320     g_signal_handlers_disconnect_by_func(videoSinkPad.get(), reinterpret_cast<gpointer>(mediaPlayerPrivateVideoSinkCapsChangedCallback), this);
 321
 322     if (m_videoTimerHandler)
 323         g_source_remove(m_videoTimerHandler);
 324
 325     if (m_audioTimerHandler)
 326         g_source_remove(m_audioTimerHandler);
 327
 328     if (m_textTimerHandler)
 329         g_source_remove(m_textTimerHandler);
 330 }
 331
 332 void MediaPlayerPrivateGStreamer::load(const String& url)
 333 {
 334     if (!initializeGStreamerAndRegisterWebKitElements())
 335         return;
 336
 337     KURL kurl(KURL(), url);
 338     String cleanUrl(url);
 339
 340     // Clean out everything after file:// url path.
 341     if (kurl.isLocalFile())
 342         cleanUrl = cleanUrl.substring(0, kurl.pathEnd());
 343
 344     if (!m_playBin)
 345         createGSTPlayBin();
 346
 347     ASSERT(m_playBin);
 348
 349     m_url = KURL(KURL(), cleanUrl);
 350     g_object_set(m_playBin.get(), "uri", cleanUrl.utf8().data(), NULL);
 351
 352     INFO_MEDIA_MESSAGE("Load %s", cleanUrl.utf8().data());
 353
 354     if (m_preload == MediaPlayer::None) {
 355         LOG_MEDIA_MESSAGE("Delaying load.");
 356         m_delayingLoad = true;
 357     }
 358
 359     // Reset network and ready states. Those will be set properly once
 360     // the pipeline pre-rolled.
 361     m_networkState = MediaPlayer::Loading;
 362     m_player->networkStateChanged();
 363     m_readyState = MediaPlayer::HaveNothing;
 364     m_player->readyStateChanged();
 365     m_volumeAndMuteInitialized = false;
 366
 367     if (!m_delayingLoad)
 368         commitLoad();
 369 }
 370
 371 #if ENABLE(MEDIA_SOURCE)
 372 void MediaPlayerPrivateGStreamer::load(const String& url, PassRefPtr<MediaSource>)
 373 {
 374     notImplemented();
 375 }
 376 #endif
 377
 378 void MediaPlayerPrivateGStreamer::commitLoad()
 379 {
 380     ASSERT(!m_delayingLoad);
 381     LOG_MEDIA_MESSAGE("Committing load.");
 382
 383     // GStreamer needs to have the pipeline set to a paused state to
 384     // start providing anything useful.
 385     changePipelineState(GST_STATE_PAUSED);
 386
 387     setDownloadBuffering();
 388     updateStates();
 389 }
 390
 391 float MediaPlayerPrivateGStreamer::playbackPosition() const
 392 {
 393     if (m_isEndReached) {
 394         // Position queries on a null pipeline return 0. If we're at
 395         // the end of the stream the pipeline is null but we want to
 396         // report either the seek time or the duration because this is
 397         // what the Media element spec expects us to do.
 398         if (m_seeking)
 399             return m_seekTime;
 400         if (m_mediaDuration)
 401             return m_mediaDuration;
 402         return 0;
 403     }
 404
 405     // Position is only available if no async state change is going on and the state is either paused or playing.
 406     gint64 position = GST_CLOCK_TIME_NONE;
 407     GstQuery* query= gst_query_new_position(GST_FORMAT_TIME);
 408     if (gst_element_query(m_playBin.get(), query))
 409         gst_query_parse_position(query, 0, &position);
 410
 411     float result = 0.0f;
 412     if (static_cast<GstClockTime>(position) != GST_CLOCK_TIME_NONE)
 413         result = static_cast<double>(position) / GST_SECOND;
 414     else if (m_canFallBackToLastFinishedSeekPositon)
 415         result = m_seekTime;
 416
 417     LOG_MEDIA_MESSAGE("Position %" GST_TIME_FORMAT, GST_TIME_ARGS(position));
 418
 419     gst_query_unref(query);
 420
 421     return result;
 422 }
 423
 424 bool MediaPlayerPrivateGStreamer::changePipelineState(GstState newState)
 425 {
 426     ASSERT(m_playBin);
 427
 428     GstState currentState;
 429     GstState pending;
 430
 431     gst_element_get_state(m_playBin.get(), &currentState, &pending, 0);
 432     if (currentState == newState || pending == newState) {
 433         LOG_MEDIA_MESSAGE("Rejected state change to %s from %s with %s pending", gst_element_state_get_name(newState),
 434             gst_element_state_get_name(currentState), gst_element_state_get_name(pending));
 435         return true;
 436     }
 437
 438     LOG_MEDIA_MESSAGE("Changing state change to %s from %s with %s pending", gst_element_state_get_name(newState),
 439         gst_element_state_get_name(currentState), gst_element_state_get_name(pending));
 440
 441     GstStateChangeReturn setStateResult = gst_element_set_state(m_playBin.get(), newState);
 442     GstState pausedOrPlaying = newState == GST_STATE_PLAYING ? GST_STATE_PAUSED : GST_STATE_PLAYING;
 443     if (currentState != pausedOrPlaying && setStateResult == GST_STATE_CHANGE_FAILURE) {
 444         loadingFailed(MediaPlayer::Empty);
 445         return false;
 446     }
 447
 448     // Create a timer when entering the READY state so that we can free resources
 449     // if we stay for too long on READY.
 450     // Also lets remove the timer if we request a state change for any state other than READY.
 451     // See also https://bugs.webkit.org/show_bug.cgi?id=117354
 452     if (newState == GST_STATE_READY && !m_readyTimerHandler) {
 453         m_readyTimerHandler = g_timeout_add_seconds(gReadyStateTimerInterval, reinterpret_cast<GSourceFunc>(mediaPlayerPrivateReadyStateTimeoutCallback), this);
 454     } else if (newState != GST_STATE_READY && m_readyTimerHandler) {
 455         g_source_remove(m_readyTimerHandler);
 456         m_readyTimerHandler = 0;
 457     }
 458
 459     return true;
 460 }
 461
 462 void MediaPlayerPrivateGStreamer::prepareToPlay()
 463 {
 464     m_preload = MediaPlayer::Auto;
 465     if (m_delayingLoad) {
 466         m_delayingLoad = false;
 467         commitLoad();
 468     }
 469 }
 470
 471 void MediaPlayerPrivateGStreamer::play()
 472 {
 473     if (changePipelineState(GST_STATE_PLAYING)) {
 474         m_isEndReached = false;
 475         m_delayingLoad = false;
 476         m_preload = MediaPlayer::Auto;
 477         setDownloadBuffering();
 478         LOG_MEDIA_MESSAGE("Play");
 479     }
 480 }
 481
 482 void MediaPlayerPrivateGStreamer::pause()
 483 {
 484     GstState currentState, pendingState;
 485     gst_element_get_state(m_playBin.get(), &currentState, &pendingState, 0);
 486     if (currentState < GST_STATE_PAUSED && pendingState <= GST_STATE_PAUSED)
 487         return;
 488
 489     if (changePipelineState(GST_STATE_PAUSED))
 490         INFO_MEDIA_MESSAGE("Pause");
 491 }
 492
 493 float MediaPlayerPrivateGStreamer::duration() const
 494 {
 495     if (!m_playBin)
 496         return 0.0f;
 497
 498     if (m_errorOccured)
 499         return 0.0f;
 500
 501     // Media duration query failed already, don't attempt new useless queries.
 502     if (!m_mediaDurationKnown)
 503         return numeric_limits<float>::infinity();
 504
 505     if (m_mediaDuration)
 506         return m_mediaDuration;
 507
 508     GstFormat timeFormat = GST_FORMAT_TIME;
 509     gint64 timeLength = 0;
 510
 511 #ifdef GST_API_VERSION_1
 512     bool failure = !gst_element_query_duration(m_playBin.get(), timeFormat, &timeLength) || static_cast<guint64>(timeLength) == GST_CLOCK_TIME_NONE;
 513 #else
 514     bool failure = !gst_element_query_duration(m_playBin.get(), &timeFormat, &timeLength) || timeFormat != GST_FORMAT_TIME || static_cast<guint64>(timeLength) == GST_CLOCK_TIME_NONE;
 515 #endif
 516     if (failure) {
 517         LOG_MEDIA_MESSAGE("Time duration query failed for %s", m_url.string().utf8().data());
 518         return numeric_limits<float>::infinity();
 519     }
 520
 521     LOG_MEDIA_MESSAGE("Duration: %" GST_TIME_FORMAT, GST_TIME_ARGS(timeLength));
 522
 523     m_mediaDuration = static_cast<double>(timeLength) / GST_SECOND;
 524     return m_mediaDuration;
 525     // FIXME: handle 3.14.9.5 properly
 526 }
 527
 528 float MediaPlayerPrivateGStreamer::currentTime() const
 529 {
 530     if (!m_playBin)
 531         return 0.0f;
 532
 533     if (m_errorOccured)
 534         return 0.0f;
 535
 536     if (m_seeking)
 537         return m_seekTime;
 538
 539     // Workaround for
 540     // https://bugzilla.gnome.org/show_bug.cgi?id=639941 In GStreamer
 541     // 0.10.35 basesink reports wrong duration in case of EOS and
 542     // negative playback rate. There's no upstream accepted patch for
 543     // this bug yet, hence this temporary workaround.
 544     if (m_isEndReached && m_playbackRate < 0)
 545         return 0.0f;
 546
 547     return playbackPosition();
 548 }
 549
 550 void MediaPlayerPrivateGStreamer::seek(float time)
 551 {
 552     if (!m_playBin)
 553         return;
 554
 555     if (m_errorOccured)
 556         return;
 557
 558     INFO_MEDIA_MESSAGE("[Seek] seek attempt to %f secs", time);
 559
 560     // Avoid useless seeking.
 561     if (time == currentTime())
 562         return;
 563
 564     if (isLiveStream())
 565         return;
 566
 567     GstClockTime clockTime = toGstClockTime(time);
 568     INFO_MEDIA_MESSAGE("[Seek] seeking to %" GST_TIME_FORMAT " (%f)", GST_TIME_ARGS(clockTime), time);
 569
 570     if (m_seeking) {
 571         m_timeOfOverlappingSeek = time;
 572         if (m_seekIsPending) {
 573             m_seekTime = time;
 574             return;
 575         }
 576     }
 577
 578     GstState state;
 579     GstStateChangeReturn getStateResult = gst_element_get_state(m_playBin.get(), &state, 0, 0);
 580     if (getStateResult == GST_STATE_CHANGE_FAILURE || getStateResult == GST_STATE_CHANGE_NO_PREROLL) {
 581         LOG_MEDIA_MESSAGE("[Seek] cannot seek, current state change is %s", gst_element_state_change_return_get_name(getStateResult));
 582         return;
 583     }
 584     if (getStateResult == GST_STATE_CHANGE_ASYNC || state < GST_STATE_PAUSED || m_isEndReached) {
 585         m_seekIsPending = true;
 586         if (m_isEndReached) {
 587             LOG_MEDIA_MESSAGE("[Seek] reset pipeline");
 588             m_resetPipeline = true;
 589             changePipelineState(GST_STATE_PAUSED);
 590         }
 591     } else {
 592         // We can seek now.
 593         if (!gst_element_seek(m_playBin.get(), m_player->rate(), GST_FORMAT_TIME, static_cast<GstSeekFlags>(GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE),
 594             GST_SEEK_TYPE_SET, clockTime, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE)) {
 595             LOG_MEDIA_MESSAGE("[Seek] seeking to %f failed", time);
 596             return;
 597         }
 598     }
 599
 600     m_seeking = true;
 601     m_seekTime = time;
 602     m_isEndReached = false;
 603 }
 604
 605 bool MediaPlayerPrivateGStreamer::paused() const
 606 {
 607     if (m_isEndReached) {
 608         LOG_MEDIA_MESSAGE("Ignoring pause at EOS");
 609         return true;
 610     }
 611
 612     GstState state;
 613     gst_element_get_state(m_playBin.get(), &state, 0, 0);
 614     return state == GST_STATE_PAUSED;
 615 }
 616
 617 bool MediaPlayerPrivateGStreamer::seeking() const
 618 {
 619     return m_seeking;
 620 }
 621
 622 void MediaPlayerPrivateGStreamer::videoChanged()
 623 {
 624     if (m_videoTimerHandler)
 625         g_source_remove(m_videoTimerHandler);
 626     m_videoTimerHandler = g_timeout_add(0, reinterpret_cast<GSourceFunc>(mediaPlayerPrivateVideoChangeTimeoutCallback), this);
 627 }
 628
 629 void MediaPlayerPrivateGStreamer::notifyPlayerOfVideo()
 630 {
 631     m_videoTimerHandler = 0;
 632
 633     gint videoTracks = 0;
 634     if (m_playBin)
 635         g_object_get(m_playBin.get(), "n-video", &videoTracks, NULL);
 636
 637     m_hasVideo = videoTracks > 0;
 638
 639     m_videoSize = IntSize();
 640
 641     m_player->mediaPlayerClient()->mediaPlayerEngineUpdated(m_player);
 642 }
 643
 644 void MediaPlayerPrivateGStreamer::audioChanged()
 645 {
 646     if (m_audioTimerHandler)
 647         g_source_remove(m_audioTimerHandler);
 648     m_audioTimerHandler = g_timeout_add(0, reinterpret_cast<GSourceFunc>(mediaPlayerPrivateAudioChangeTimeoutCallback), this);
 649 }
 650
 651 void MediaPlayerPrivateGStreamer::notifyPlayerOfAudio()
 652 {
 653     m_audioTimerHandler = 0;
 654
 655     gint audioTracks = 0;
 656     if (m_playBin)
 657         g_object_get(m_playBin.get(), "n-audio", &audioTracks, NULL);
 658     m_hasAudio = audioTracks > 0;
 659     m_player->mediaPlayerClient()->mediaPlayerEngineUpdated(m_player);
 660 }
 661
 662 #if ENABLE(VIDEO_TRACK) && defined(GST_API_VERSION_1)
 663 void MediaPlayerPrivateGStreamer::textChanged()
 664 {
 665     if (m_textTimerHandler)
 666         g_source_remove(m_textTimerHandler);
 667     m_textTimerHandler = g_timeout_add(0, reinterpret_cast<GSourceFunc>(mediaPlayerPrivateTextChangeTimeoutCallback), this);
 668 }
 669
 670 void MediaPlayerPrivateGStreamer::notifyPlayerOfText()
 671 {
 672     m_textTimerHandler = 0;
 673
 674     gint numTracks = 0;
 675     if (m_playBin)
 676         g_object_get(m_playBin.get(), "n-text", &numTracks, NULL);
 677
 678     for (gint i = 0; i < numTracks; ++i) {
 679         GstPad* pad;
 680         g_signal_emit_by_name(m_playBin.get(), "get-text-pad", i, &pad, NULL);
 681         ASSERT(pad);
 682
 683         if (i < static_cast<gint>(m_textTracks.size())) {
 684             RefPtr<InbandTextTrackPrivateGStreamer> existingTrack = m_textTracks[i];
 685             existingTrack->setIndex(i);
 686             if (existingTrack->pad() == pad) {
 687                 gst_object_unref(pad);
 688                 continue;
 689             }
 690         }
 691
 692         RefPtr<InbandTextTrackPrivateGStreamer> track = InbandTextTrackPrivateGStreamer::create(i, adoptGRef(pad));
 693         m_textTracks.insert(i, track);
 694         m_player->addTextTrack(track.release());
 695     }
 696
 697     while (static_cast<gint>(m_textTracks.size()) > numTracks) {
 698         RefPtr<InbandTextTrackPrivateGStreamer> track = m_textTracks.last();
 699         track->disconnect();
 700         m_textTracks.removeLast();
 701         m_player->removeTextTrack(track.release());
 702     }
 703 }
 704
 705 void MediaPlayerPrivateGStreamer::newTextSample()
 706 {
 707     if (!m_textAppSink)
 708         return;
 709
 710     GRefPtr<GstEvent> streamStartEvent = adoptGRef(
 711         gst_pad_get_sticky_event(m_textAppSinkPad.get(), GST_EVENT_STREAM_START, 0));
 712
 713     GstSample* sample;
 714     g_signal_emit_by_name(m_textAppSink.get(), "pull-sample", &sample, NULL);
 715     ASSERT(sample);
 716
 717     if (streamStartEvent) {
 718         bool found = FALSE;
 719         const gchar* id;
 720         gst_event_parse_stream_start(streamStartEvent.get(), &id);
 721         for (size_t i = 0; i < m_textTracks.size(); ++i) {
 722             RefPtr<InbandTextTrackPrivateGStreamer> track = m_textTracks[i];
 723             if (track->streamId() == id) {
 724                 track->handleSample(sample);
 725                 found = true;
 726                 break;
 727             }
 728         }
 729         if (!found)
 730             WARN_MEDIA_MESSAGE("Got sample with unknown stream ID.");
 731     } else
 732         WARN_MEDIA_MESSAGE("Unable to handle sample with no stream start event.");
 733     gst_sample_unref(sample);
 734 }
 735 #endif
 736
 737 void MediaPlayerPrivateGStreamer::setRate(float rate)
 738 {
 739     // Avoid useless playback rate update.
 740     if (m_playbackRate == rate)
 741         return;
 742
 743     GstState state;
 744     GstState pending;
 745
 746     gst_element_get_state(m_playBin.get(), &state, &pending, 0);
 747     if ((state != GST_STATE_PLAYING && state != GST_STATE_PAUSED)
 748         || (pending == GST_STATE_PAUSED))
 749         return;
 750
 751     if (isLiveStream())
 752         return;
 753
 754     m_playbackRate = rate;
 755     m_changingRate = true;
 756
 757     if (!rate) {
 758         changePipelineState(GST_STATE_PAUSED);
 759         return;
 760     }
 761
 762     float currentPosition = static_cast<float>(playbackPosition() * GST_SECOND);
 763     GstSeekFlags flags = (GstSeekFlags)(GST_SEEK_FLAG_FLUSH);
 764     gint64 start, end;
 765     bool mute = false;
 766
 767     INFO_MEDIA_MESSAGE("Set Rate to %f", rate);
 768     if (rate > 0) {
 769         // Mute the sound if the playback rate is too extreme and
 770         // audio pitch is not adjusted.
 771         mute = (!m_preservesPitch && (rate < 0.8 || rate > 2));
 772         start = currentPosition;
 773         end = GST_CLOCK_TIME_NONE;
 774     } else {
 775         start = 0;
 776         mute = true;
 777
 778         // If we are at beginning of media, start from the end to
 779         // avoid immediate EOS.
 780         if (currentPosition <= 0)
 781             end = static_cast<gint64>(duration() * GST_SECOND);
 782         else
 783             end = currentPosition;
 784     }
 785
 786     INFO_MEDIA_MESSAGE("Need to mute audio?: %d", (int) mute);
 787
 788     if (!gst_element_seek(m_playBin.get(), rate, GST_FORMAT_TIME, flags,
 789                           GST_SEEK_TYPE_SET, start,
 790                           GST_SEEK_TYPE_SET, end))
 791         ERROR_MEDIA_MESSAGE("Set rate to %f failed", rate);
 792     else
 793         g_object_set(m_playBin.get(), "mute", mute, NULL);
 794 }
 795
 796 void MediaPlayerPrivateGStreamer::setPreservesPitch(bool preservesPitch)
 797 {
 798     m_preservesPitch = preservesPitch;
 799 }
 800
 801 PassRefPtr<TimeRanges> MediaPlayerPrivateGStreamer::buffered() const
 802 {
 803     RefPtr<TimeRanges> timeRanges = TimeRanges::create();
 804     if (m_errorOccured || isLiveStream())
 805         return timeRanges.release();
 806
 807 #if GST_CHECK_VERSION(0, 10, 31)
 808     float mediaDuration(duration());
 809     if (!mediaDuration || std::isinf(mediaDuration))
 810         return timeRanges.release();
 811
 812     GstQuery* query = gst_query_new_buffering(GST_FORMAT_PERCENT);
 813
 814     if (!gst_element_query(m_playBin.get(), query)) {
 815         gst_query_unref(query);
 816         return timeRanges.release();
 817     }
 818
 819     for (guint index = 0; index < gst_query_get_n_buffering_ranges(query); index++) {
 820         gint64 rangeStart = 0, rangeStop = 0;
 821         if (gst_query_parse_nth_buffering_range(query, index, &rangeStart, &rangeStop))
 822             timeRanges->add(static_cast<float>((rangeStart * mediaDuration) / gPercentMax),
 823                 static_cast<float>((rangeStop * mediaDuration) / gPercentMax));
 824     }
 825
 826     // Fallback to the more general maxTimeLoaded() if no range has
 827     // been found.
 828     if (!timeRanges->length())
 829         if (float loaded = maxTimeLoaded())
 830             timeRanges->add(0, loaded);
 831
 832     gst_query_unref(query);
 833 #else
 834     float loaded = maxTimeLoaded();
 835     if (!m_errorOccured && !isLiveStream() && loaded > 0)
 836         timeRanges->add(0, loaded);
 837 #endif
 838     return timeRanges.release();
 839 }
 840
 841 gboolean MediaPlayerPrivateGStreamer::handleMessage(GstMessage* message)
 842 {
 843     GOwnPtr<GError> err;
 844     GOwnPtr<gchar> debug;
 845     MediaPlayer::NetworkState error;
 846     bool issueError = true;
 847     bool attemptNextLocation = false;
 848     const GstStructure* structure = gst_message_get_structure(message);
 849     GstState requestedState, currentState;
 850
 851     m_canFallBackToLastFinishedSeekPositon = false;
 852
 853     if (structure) {
 854         const gchar* messageTypeName = gst_structure_get_name(structure);
 855
 856         // Redirect messages are sent from elements, like qtdemux, to
 857         // notify of the new location(s) of the media.
 858         if (!g_strcmp0(messageTypeName, "redirect")) {
 859             mediaLocationChanged(message);
 860             return TRUE;
 861         }
 862     }
 863
 864     // We ignore state changes from internal elements. They are forwarded to playbin2 anyway.
 865     bool messageSourceIsPlaybin = GST_MESSAGE_SRC(message) == reinterpret_cast<GstObject*>(m_playBin.get());
 866
 867     LOG_MEDIA_MESSAGE("Message %s received from element %s", GST_MESSAGE_TYPE_NAME(message), GST_MESSAGE_SRC_NAME(message));
 868     switch (GST_MESSAGE_TYPE(message)) {
 869     case GST_MESSAGE_ERROR:
 870         if (m_resetPipeline)
 871             break;
 872         if (m_missingPlugins)
 873             break;
 874         gst_message_parse_error(message, &err.outPtr(), &debug.outPtr());
 875         ERROR_MEDIA_MESSAGE("Error %d: %s (url=%s)", err->code, err->message, m_url.string().utf8().data());
 876
 877         GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS(GST_BIN(m_playBin.get()), GST_DEBUG_GRAPH_SHOW_ALL, "webkit-video.error");
 878
 879         error = MediaPlayer::Empty;
 880         if (err->code == GST_STREAM_ERROR_CODEC_NOT_FOUND
 881             || err->code == GST_STREAM_ERROR_WRONG_TYPE
 882             || err->code == GST_STREAM_ERROR_FAILED
 883             || err->code == GST_CORE_ERROR_MISSING_PLUGIN
 884             || err->code == GST_RESOURCE_ERROR_NOT_FOUND)
 885             error = MediaPlayer::FormatError;
 886         else if (err->domain == GST_STREAM_ERROR) {
 887             // Let the mediaPlayerClient handle the stream error, in
 888             // this case the HTMLMediaElement will emit a stalled
 889             // event.
 890             if (err->code == GST_STREAM_ERROR_TYPE_NOT_FOUND) {
 891                 ERROR_MEDIA_MESSAGE("Decode error, let the Media element emit a stalled event.");
 892                 break;
 893             }
 894             error = MediaPlayer::DecodeError;
 895             attemptNextLocation = true;
 896         } else if (err->domain == GST_RESOURCE_ERROR)
 897             error = MediaPlayer::NetworkError;
 898
 899         if (attemptNextLocation)
 900             issueError = !loadNextLocation();
 901         if (issueError)
 902             loadingFailed(error);
 903         break;
 904     case GST_MESSAGE_EOS:
 905         didEnd();
 906         break;
 907     case GST_MESSAGE_ASYNC_DONE:
 908         if (!messageSourceIsPlaybin || m_delayingLoad)
 909             break;
 910         asyncStateChangeDone();
 911         break;
 912     case GST_MESSAGE_STATE_CHANGED: {
 913         if (!messageSourceIsPlaybin || m_delayingLoad)
 914             break;
 915         updateStates();
 916
 917         // Construct a filename for the graphviz dot file output.
 918         GstState newState;
 919         gst_message_parse_state_changed(message, &currentState, &newState, 0);
 920         CString dotFileName = String::format("webkit-video.%s_%s", gst_element_state_get_name(currentState), gst_element_state_get_name(newState)).utf8();
 921         GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS(GST_BIN(m_playBin.get()), GST_DEBUG_GRAPH_SHOW_ALL, dotFileName.data());
 922
 923         break;
 924     }
 925     case GST_MESSAGE_BUFFERING:
 926         processBufferingStats(message);
 927         break;
 928 #ifdef GST_API_VERSION_1
 929     case GST_MESSAGE_DURATION_CHANGED:
 930 #else
 931     case GST_MESSAGE_DURATION:
 932 #endif
 933         if (messageSourceIsPlaybin)
 934             durationChanged();
 935         break;
 936     case GST_MESSAGE_REQUEST_STATE:
 937         gst_message_parse_request_state(message, &requestedState);
 938         gst_element_get_state(m_playBin.get(), &currentState, NULL, 250);
 939         if (requestedState < currentState) {
 940             GOwnPtr<gchar> elementName(gst_element_get_name(GST_ELEMENT(message)));
 941             INFO_MEDIA_MESSAGE("Element %s requested state change to %s", elementName.get(),
 942                 gst_element_state_get_name(requestedState));
 943             m_requestedState = requestedState;
 944             changePipelineState(requestedState);
 945         }
 946         break;
 947     case GST_MESSAGE_ELEMENT:
 948         if (gst_is_missing_plugin_message(message)) {
 949             gchar* detail = gst_missing_plugin_message_get_installer_detail(message);
 950             gchar* detailArray[2] = {detail, 0};
 951             GstInstallPluginsReturn result = gst_install_plugins_async(detailArray, 0, mediaPlayerPrivatePluginInstallerResultFunction, this);
 952             m_missingPlugins = result == GST_INSTALL_PLUGINS_STARTED_OK;
 953             g_free(detail);
 954         }
 955         break;
 956     default:
 957         LOG_MEDIA_MESSAGE("Unhandled GStreamer message type: %s",
 958                     GST_MESSAGE_TYPE_NAME(message));
 959         break;
 960     }
 961     return TRUE;
 962 }
 963
 964 void MediaPlayerPrivateGStreamer::handlePluginInstallerResult(GstInstallPluginsReturn result)
 965 {
 966     m_missingPlugins = false;
 967     if (result == GST_INSTALL_PLUGINS_SUCCESS) {
 968         changePipelineState(GST_STATE_READY);
 969         changePipelineState(GST_STATE_PAUSED);
 970     }
 971 }
 972
 973 void MediaPlayerPrivateGStreamer::processBufferingStats(GstMessage* message)
 974 {
 975     m_buffering = true;
 976     const GstStructure *structure = gst_message_get_structure(message);
 977     gst_structure_get_int(structure, "buffer-percent", &m_bufferingPercentage);
 978
 979     LOG_MEDIA_MESSAGE("[Buffering] Buffering: %d%%.", m_bufferingPercentage);
 980
 981     updateStates();
 982 }
 983
 984 void MediaPlayerPrivateGStreamer::fillTimerFired(Timer<MediaPlayerPrivateGStreamer>*)
 985 {
 986     GstQuery* query = gst_query_new_buffering(GST_FORMAT_PERCENT);
 987
 988     if (!gst_element_query(m_playBin.get(), query)) {
 989         gst_query_unref(query);
 990         return;
 991     }
 992
 993     gint64 start, stop;
 994     gdouble fillStatus = 100.0;
 995
 996     gst_query_parse_buffering_range(query, 0, &start, &stop, 0);
 997     gst_query_unref(query);
 998
 999     if (stop != -1)
1000         fillStatus = 100.0 * stop / GST_FORMAT_PERCENT_MAX;
1001
1002     LOG_MEDIA_MESSAGE("[Buffering] Download buffer filled up to %f%%", fillStatus);
1003
1004     if (!m_mediaDuration)
1005         durationChanged();
1006
1007     // Update maxTimeLoaded only if the media duration is
1008     // available. Otherwise we can't compute it.
1009     if (m_mediaDuration) {
1010         if (fillStatus == 100.0)
1011             m_maxTimeLoaded = m_mediaDuration;
1012         else
1013             m_maxTimeLoaded = static_cast<float>((fillStatus * m_mediaDuration) / 100.0);
1014         LOG_MEDIA_MESSAGE("[Buffering] Updated maxTimeLoaded: %f", m_maxTimeLoaded);
1015     }
1016
1017     m_downloadFinished = fillStatus == 100.0;
1018     if (!m_downloadFinished) {
1019         updateStates();
1020         return;
1021     }
1022
1023     // Media is now fully loaded. It will play even if network
1024     // connection is cut. Buffering is done, remove the fill source
1025     // from the main loop.
1026     m_fillTimer.stop();
1027     updateStates();
1028 }
1029
1030 float MediaPlayerPrivateGStreamer::maxTimeSeekable() const
1031 {
1032     if (m_errorOccured)
1033         return 0.0f;
1034
1035     LOG_MEDIA_MESSAGE("maxTimeSeekable");
1036     // infinite duration means live stream
1037     if (std::isinf(duration()))
1038         return 0.0f;
1039
1040     return duration();
1041 }
1042
1043 float MediaPlayerPrivateGStreamer::maxTimeLoaded() const
1044 {
1045     if (m_errorOccured)
1046         return 0.0f;
1047
1048     float loaded = m_maxTimeLoaded;
1049     if (m_isEndReached && m_mediaDuration)
1050         loaded = m_mediaDuration;
1051     LOG_MEDIA_MESSAGE("maxTimeLoaded: %f", loaded);
1052     return loaded;
1053 }
1054
1055 bool MediaPlayerPrivateGStreamer::didLoadingProgress() const
1056 {
1057     if (!m_playBin || !m_mediaDuration || !totalBytes())
1058         return false;
1059     float currentMaxTimeLoaded = maxTimeLoaded();
1060     bool didLoadingProgress = currentMaxTimeLoaded != m_maxTimeLoadedAtLastDidLoadingProgress;
1061     m_maxTimeLoadedAtLastDidLoadingProgress = currentMaxTimeLoaded;
1062     LOG_MEDIA_MESSAGE("didLoadingProgress: %d", didLoadingProgress);
1063     return didLoadingProgress;
1064 }
1065
1066 unsigned MediaPlayerPrivateGStreamer::totalBytes() const
1067 {
1068     if (m_errorOccured)
1069         return 0;
1070
1071     if (m_totalBytes != -1)
1072         return m_totalBytes;
1073
1074     if (!m_source)
1075         return 0;
1076
1077     GstFormat fmt = GST_FORMAT_BYTES;
1078     gint64 length = 0;
1079 #ifdef GST_API_VERSION_1
1080     if (gst_element_query_duration(m_source.get(), fmt, &length)) {
1081 #else
1082     if (gst_element_query_duration(m_source.get(), &fmt, &length)) {
1083 #endif
1084         INFO_MEDIA_MESSAGE("totalBytes %" G_GINT64_FORMAT, length);
1085         m_totalBytes = static_cast<unsigned>(length);
1086         m_isStreaming = !length;
1087         return m_totalBytes;
1088     }
1089
1090     // Fall back to querying the source pads manually.
1091     // See also https://bugzilla.gnome.org/show_bug.cgi?id=638749
1092     GstIterator* iter = gst_element_iterate_src_pads(m_source.get());
1093     bool done = false;
1094     while (!done) {
1095 #ifdef GST_API_VERSION_1
1096         GValue item = G_VALUE_INIT;
1097         switch (gst_iterator_next(iter, &item)) {
1098         case GST_ITERATOR_OK: {
1099             GstPad* pad = static_cast<GstPad*>(g_value_get_object(&item));
1100             gint64 padLength = 0;
1101             if (gst_pad_query_duration(pad, fmt, &padLength) && padLength > length)
1102                 length = padLength;
1103             break;
1104         }
1105 #else
1106         gpointer data;
1107
1108         switch (gst_iterator_next(iter, &data)) {
1109         case GST_ITERATOR_OK: {
1110             GRefPtr<GstPad> pad = adoptGRef(GST_PAD_CAST(data));
1111             gint64 padLength = 0;
1112             if (gst_pad_query_duration(pad.get(), &fmt, &padLength) && padLength > length)
1113                 length = padLength;
1114             break;
1115         }
1116 #endif
1117         case GST_ITERATOR_RESYNC:
1118             gst_iterator_resync(iter);
1119             break;
1120         case GST_ITERATOR_ERROR:
1121             // Fall through.
1122         case GST_ITERATOR_DONE:
1123             done = true;
1124             break;
1125         }
1126
1127 #ifdef GST_API_VERSION_1
1128         g_value_unset(&item);
1129 #endif
1130     }
1131
1132     gst_iterator_free(iter);
1133
1134     INFO_MEDIA_MESSAGE("totalBytes %" G_GINT64_FORMAT, length);
1135     m_totalBytes = static_cast<unsigned>(length);
1136     m_isStreaming = !length;
1137     return m_totalBytes;
1138 }
1139
1140 void MediaPlayerPrivateGStreamer::updateAudioSink()
1141 {
1142     if (!m_playBin)
1143         return;
1144
1145     GstElement* sinkPtr = 0;
1146
1147     g_object_get(m_playBin.get(), "audio-sink", &sinkPtr, NULL);
1148     m_webkitAudioSink = adoptGRef(sinkPtr);
1149
1150 }
1151
1152 GstElement* MediaPlayerPrivateGStreamer::audioSink() const
1153 {
1154     return m_webkitAudioSink.get();
1155 }
1156
1157 void MediaPlayerPrivateGStreamer::sourceChanged()
1158 {
1159     GstElement* srcPtr = 0;
1160
1161     g_object_get(m_playBin.get(), "source", &srcPtr, NULL);
1162     m_source = adoptGRef(srcPtr);
1163
1164     if (WEBKIT_IS_WEB_SRC(m_source.get()))
1165         webKitWebSrcSetMediaPlayer(WEBKIT_WEB_SRC(m_source.get()), m_player);
1166 }
1167
1168 void MediaPlayerPrivateGStreamer::cancelLoad()
1169 {
1170     if (m_networkState < MediaPlayer::Loading || m_networkState == MediaPlayer::Loaded)
1171         return;
1172
1173     if (m_playBin)
1174         changePipelineState(GST_STATE_READY);
1175 }
1176
1177 void MediaPlayerPrivateGStreamer::asyncStateChangeDone()
1178 {
1179     if (!m_playBin || m_errorOccured)
1180         return;
1181
1182     if (m_seeking) {
1183         if (m_seekIsPending)
1184             updateStates();
1185         else {
1186             LOG_MEDIA_MESSAGE("[Seek] seeked to %f", m_seekTime);
1187             m_seeking = false;
1188             if (m_timeOfOverlappingSeek != m_seekTime && m_timeOfOverlappingSeek != -1) {
1189                 seek(m_timeOfOverlappingSeek);
1190                 m_timeOfOverlappingSeek = -1;
1191                 return;
1192             }
1193             m_timeOfOverlappingSeek = -1;
1194
1195             // The pipeline can still have a pending state. In this case a position query will fail.
1196             // Right now we can use m_seekTime as a fallback.
1197             m_canFallBackToLastFinishedSeekPositon = true;
1198             timeChanged();
1199         }
1200     } else
1201         updateStates();
1202 }
1203
1204 void MediaPlayerPrivateGStreamer::updateStates()
1205 {
1206     if (!m_playBin)
1207         return;
1208
1209     if (m_errorOccured)
1210         return;
1211
1212     MediaPlayer::NetworkState oldNetworkState = m_networkState;
1213     MediaPlayer::ReadyState oldReadyState = m_readyState;
1214     GstState state;
1215     GstState pending;
1216
1217     GstStateChangeReturn getStateResult = gst_element_get_state(m_playBin.get(), &state, &pending, 250 * GST_NSECOND);
1218
1219     bool shouldUpdatePlaybackState = false;
1220     switch (getStateResult) {
1221     case GST_STATE_CHANGE_SUCCESS: {
1222         LOG_MEDIA_MESSAGE("State: %s, pending: %s", gst_element_state_get_name(state), gst_element_state_get_name(pending));
1223
1224         if (state <= GST_STATE_READY) {
1225             m_resetPipeline = true;
1226             m_mediaDuration = 0;
1227         } else {
1228             m_resetPipeline = false;
1229             cacheDuration();
1230         }
1231
1232         bool didBuffering = m_buffering;
1233
1234         // Update ready and network states.
1235         switch (state) {
1236         case GST_STATE_NULL:
1237             m_readyState = MediaPlayer::HaveNothing;
1238             m_networkState = MediaPlayer::Empty;
1239             break;
1240         case GST_STATE_READY:
1241             // Do not change network/ready states if on EOS and state changed to READY to avoid
1242             // recreating the player on HTMLMediaElement.
1243             if (!m_isEndReached) {
1244                 m_readyState = MediaPlayer::HaveMetadata;
1245                 m_networkState = MediaPlayer::Empty;
1246             }
1247             break;
1248         case GST_STATE_PAUSED:
1249         case GST_STATE_PLAYING:
1250             if (m_buffering) {
1251                 if (m_bufferingPercentage == 100) {
1252                     LOG_MEDIA_MESSAGE("[Buffering] Complete.");
1253                     m_buffering = false;
1254                     m_readyState = MediaPlayer::HaveEnoughData;
1255                     m_networkState = m_downloadFinished ? MediaPlayer::Idle : MediaPlayer::Loading;
1256                 } else {
1257                     m_readyState = MediaPlayer::HaveCurrentData;
1258                     m_networkState = MediaPlayer::Loading;
1259                 }
1260             } else if (m_downloadFinished) {
1261                 m_readyState = MediaPlayer::HaveEnoughData;
1262                 m_networkState = MediaPlayer::Loaded;
1263             } else {
1264                 m_readyState = MediaPlayer::HaveFutureData;
1265                 m_networkState = MediaPlayer::Loading;
1266             }
1267
1268             break;
1269         default:
1270             ASSERT_NOT_REACHED();
1271             break;
1272         }
1273
1274         // Sync states where needed.
1275         if (state == GST_STATE_PAUSED) {
1276             if (!m_webkitAudioSink)
1277                 updateAudioSink();
1278
1279             if (!m_volumeAndMuteInitialized) {
1280                 notifyPlayerOfVolumeChange();
1281                 notifyPlayerOfMute();
1282                 m_volumeAndMuteInitialized = true;
1283             }
1284
1285             if (didBuffering && !m_buffering && !m_paused) {
1286                 LOG_MEDIA_MESSAGE("[Buffering] Restarting playback.");
1287                 changePipelineState(GST_STATE_PLAYING);
1288             }
1289         } else if (state == GST_STATE_PLAYING) {
1290             m_paused = false;
1291
1292             if (m_buffering && !isLiveStream()) {
1293                 LOG_MEDIA_MESSAGE("[Buffering] Pausing stream for buffering.");
1294                 changePipelineState(GST_STATE_PAUSED);
1295             }
1296         } else
1297             m_paused = true;
1298
1299         if (m_changingRate) {
1300             m_player->rateChanged();
1301             m_changingRate = false;
1302         }
1303
1304         if (m_requestedState == GST_STATE_PAUSED && state == GST_STATE_PAUSED) {
1305             shouldUpdatePlaybackState = true;
1306             LOG_MEDIA_MESSAGE("Requested state change to %s was completed", gst_element_state_get_name(state));
1307         }
1308
1309         break;
1310     }
1311     case GST_STATE_CHANGE_ASYNC:
1312         LOG_MEDIA_MESSAGE("Async: State: %s, pending: %s", gst_element_state_get_name(state), gst_element_state_get_name(pending));
1313         // Change in progress.
1314         break;
1315     case GST_STATE_CHANGE_FAILURE:
1316         LOG_MEDIA_MESSAGE("Failure: State: %s, pending: %s", gst_element_state_get_name(state), gst_element_state_get_name(pending));
1317         // Change failed
1318         return;
1319     case GST_STATE_CHANGE_NO_PREROLL:
1320         LOG_MEDIA_MESSAGE("No preroll: State: %s, pending: %s", gst_element_state_get_name(state), gst_element_state_get_name(pending));
1321
1322         // Live pipelines go in PAUSED without prerolling.
1323         m_isStreaming = true;
1324         setDownloadBuffering();
1325
1326         if (state == GST_STATE_READY)
1327             m_readyState = MediaPlayer::HaveNothing;
1328         else if (state == GST_STATE_PAUSED) {
1329             m_readyState = MediaPlayer::HaveEnoughData;
1330             m_paused = true;
1331         } else if (state == GST_STATE_PLAYING)
1332             m_paused = false;
1333
1334         if (!m_paused)
1335             changePipelineState(GST_STATE_PLAYING);
1336
1337         m_networkState = MediaPlayer::Loading;
1338         break;
1339     default:
1340         LOG_MEDIA_MESSAGE("Else : %d", getStateResult);
1341         break;
1342     }
1343
1344     m_requestedState = GST_STATE_VOID_PENDING;
1345
1346     if (shouldUpdatePlaybackState)
1347         m_player->playbackStateChanged();
1348
1349     if (m_networkState != oldNetworkState) {
1350         LOG_MEDIA_MESSAGE("Network State Changed from %u to %u", oldNetworkState, m_networkState);
1351         m_player->networkStateChanged();
1352     }
1353     if (m_readyState != oldReadyState) {
1354         LOG_MEDIA_MESSAGE("Ready State Changed from %u to %u", oldReadyState, m_readyState);
1355         m_player->readyStateChanged();
1356     }
1357
1358     if (m_seekIsPending && getStateResult == GST_STATE_CHANGE_SUCCESS && (state == GST_STATE_PAUSED || state == GST_STATE_PLAYING)) {
1359         LOG_MEDIA_MESSAGE("[Seek] committing pending seek to %f", m_seekTime);
1360         m_seekIsPending = false;
1361         m_seeking = gst_element_seek(m_playBin.get(), m_player->rate(), GST_FORMAT_TIME, static_cast<GstSeekFlags>(GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE),
1362             GST_SEEK_TYPE_SET, toGstClockTime(m_seekTime), GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
1363         if (!m_seeking)
1364             LOG_MEDIA_MESSAGE("[Seek] seeking to %f failed", m_seekTime);
1365     }
1366 }
1367
1368 void MediaPlayerPrivateGStreamer::mediaLocationChanged(GstMessage* message)
1369 {
1370     if (m_mediaLocations)
1371         gst_structure_free(m_mediaLocations);
1372
1373     const GstStructure* structure = gst_message_get_structure(message);
1374     if (structure) {
1375         // This structure can contain:
1376         // - both a new-location string and embedded locations structure
1377         // - or only a new-location string.
1378         m_mediaLocations = gst_structure_copy(structure);
1379         const GValue* locations = gst_structure_get_value(m_mediaLocations, "locations");
1380
1381         if (locations)
1382             m_mediaLocationCurrentIndex = static_cast<int>(gst_value_list_get_size(locations)) -1;
1383
1384         loadNextLocation();
1385     }
1386 }
1387
1388 bool MediaPlayerPrivateGStreamer::loadNextLocation()
1389 {
1390     if (!m_mediaLocations)
1391         return false;
1392
1393     const GValue* locations = gst_structure_get_value(m_mediaLocations, "locations");
1394     const gchar* newLocation = 0;
1395
1396     if (!locations) {
1397         // Fallback on new-location string.
1398         newLocation = gst_structure_get_string(m_mediaLocations, "new-location");
1399         if (!newLocation)
1400             return false;
1401     }
1402
1403     if (!newLocation) {
1404         if (m_mediaLocationCurrentIndex < 0) {
1405             m_mediaLocations = 0;
1406             return false;
1407         }
1408
1409         const GValue* location = gst_value_list_get_value(locations,
1410                                                           m_mediaLocationCurrentIndex);
1411         const GstStructure* structure = gst_value_get_structure(location);
1412
1413         if (!structure) {
1414             m_mediaLocationCurrentIndex--;
1415             return false;
1416         }
1417
1418         newLocation = gst_structure_get_string(structure, "new-location");
1419     }
1420
1421     if (newLocation) {
1422         // Found a candidate. new-location is not always an absolute url
1423         // though. We need to take the base of the current url and
1424         // append the value of new-location to it.
1425         KURL baseUrl = gst_uri_is_valid(newLocation) ? KURL() : m_url;
1426         KURL newUrl = KURL(baseUrl, newLocation);
1427
1428         RefPtr<SecurityOrigin> securityOrigin = SecurityOrigin::create(m_url);
1429         if (securityOrigin->canRequest(newUrl)) {
1430             INFO_MEDIA_MESSAGE("New media url: %s", newUrl.string().utf8().data());
1431
1432             // Reset player states.
1433             m_networkState = MediaPlayer::Loading;
1434             m_player->networkStateChanged();
1435             m_readyState = MediaPlayer::HaveNothing;
1436             m_player->readyStateChanged();
1437
1438             // Reset pipeline state.
1439             m_resetPipeline = true;
1440             changePipelineState(GST_STATE_READY);
1441
1442             GstState state;
1443             gst_element_get_state(m_playBin.get(), &state, 0, 0);
1444             if (state <= GST_STATE_READY) {
1445                 // Set the new uri and start playing.
1446                 g_object_set(m_playBin.get(), "uri", newUrl.string().utf8().data(), NULL);
1447                 m_url = newUrl;
1448                 changePipelineState(GST_STATE_PLAYING);
1449                 return true;
1450             }
1451         } else
1452             INFO_MEDIA_MESSAGE("Not allowed to load new media location: %s", newUrl.string().utf8().data());
1453     }
1454     m_mediaLocationCurrentIndex--;
1455     return false;
1456 }
1457
1458 void MediaPlayerPrivateGStreamer::loadStateChanged()
1459 {
1460     updateStates();
1461 }
1462
1463 void MediaPlayerPrivateGStreamer::timeChanged()
1464 {
1465     updateStates();
1466     m_player->timeChanged();
1467 }
1468
1469 void MediaPlayerPrivateGStreamer::didEnd()
1470 {
1471     // Synchronize position and duration values to not confuse the
1472     // HTMLMediaElement. In some cases like reverse playback the
1473     // position is not always reported as 0 for instance.
1474     float now = currentTime();
1475     if (now > 0 && now <= duration() && m_mediaDuration != now) {
1476         m_mediaDurationKnown = true;
1477         m_mediaDuration = now;
1478         m_player->durationChanged();
1479     }
1480
1481     m_isEndReached = true;
1482     timeChanged();
1483
1484     if (!m_player->mediaPlayerClient()->mediaPlayerIsLooping()) {
1485         m_paused = true;
1486         changePipelineState(GST_STATE_READY);
1487         m_downloadFinished = false;
1488     }
1489 }
1490
1491 void MediaPlayerPrivateGStreamer::cacheDuration()
1492 {
1493     if (m_mediaDuration || !m_mediaDurationKnown)
1494         return;
1495
1496     float newDuration = duration();
1497     if (std::isinf(newDuration)) {
1498         // Only pretend that duration is not available if the the query failed in a stable pipeline state.
1499         GstState state;
1500         if (gst_element_get_state(m_playBin.get(), &state, 0, 0) == GST_STATE_CHANGE_SUCCESS && state > GST_STATE_READY)
1501             m_mediaDurationKnown = false;
1502         return;
1503     }
1504
1505     m_mediaDuration = newDuration;
1506 }
1507
1508 void MediaPlayerPrivateGStreamer::durationChanged()
1509 {
1510     float previousDuration = m_mediaDuration;
1511
1512     cacheDuration();
1513     // Avoid emiting durationchanged in the case where the previous
1514     // duration was 0 because that case is already handled by the
1515     // HTMLMediaElement.
1516     if (previousDuration && m_mediaDuration != previousDuration)
1517         m_player->durationChanged();
1518 }
1519
1520 void MediaPlayerPrivateGStreamer::loadingFailed(MediaPlayer::NetworkState error)
1521 {
1522     m_errorOccured = true;
1523     if (m_networkState != error) {
1524         m_networkState = error;
1525         m_player->networkStateChanged();
1526     }
1527     if (m_readyState != MediaPlayer::HaveNothing) {
1528         m_readyState = MediaPlayer::HaveNothing;
1529         m_player->readyStateChanged();
1530     }
1531
1532     // Loading failed, force reset pipeline and remove ready timer.
1533     gst_element_set_state(m_playBin.get(), GST_STATE_NULL);
1534     if (m_readyTimerHandler) {
1535         g_source_remove(m_readyTimerHandler);
1536         m_readyTimerHandler = 0;
1537     }
1538 }
1539
1540 static HashSet<String> mimeTypeCache()
1541 {
1542     initializeGStreamerAndRegisterWebKitElements();
1543
1544     DEFINE_STATIC_LOCAL(HashSet<String>, cache, ());
1545     static bool typeListInitialized = false;
1546
1547     if (typeListInitialized)
1548         return cache;
1549
1550     const char* mimeTypes[] = {
1551         "application/ogg",
1552         "application/vnd.apple.mpegurl",
1553         "application/vnd.rn-realmedia",
1554         "application/x-3gp",
1555         "application/x-pn-realaudio",
1556         "audio/3gpp",
1557         "audio/aac",
1558         "audio/flac",
1559         "audio/iLBC-sh",
1560         "audio/midi",
1561         "audio/mobile-xmf",
1562         "audio/mp1",
1563         "audio/mp2",
1564         "audio/mp3",
1565         "audio/mp4",
1566         "audio/mpeg",
1567         "audio/ogg",
1568         "audio/opus",
1569         "audio/qcelp",
1570         "audio/riff-midi",
1571         "audio/speex",
1572         "audio/wav",
1573         "audio/webm",
1574         "audio/x-ac3",
1575         "audio/x-aiff",
1576         "audio/x-amr-nb-sh",
1577         "audio/x-amr-wb-sh",
1578         "audio/x-au",
1579         "audio/x-ay",
1580         "audio/x-celt",
1581         "audio/x-dts",
1582         "audio/x-flac",
1583         "audio/x-gbs",
1584         "audio/x-gsm",
1585         "audio/x-gym",
1586         "audio/x-imelody",
1587         "audio/x-ircam",
1588         "audio/x-kss",
1589         "audio/x-m4a",
1590         "audio/x-mod",
1591         "audio/x-mp3",
1592         "audio/x-mpeg",
1593         "audio/x-musepack",
1594         "audio/x-nist",
1595         "audio/x-nsf",
1596         "audio/x-paris",
1597         "audio/x-sap",
1598         "audio/x-sbc",
1599         "audio/x-sds",
1600         "audio/x-shorten",
1601         "audio/x-sid",
1602         "audio/x-spc",
1603         "audio/x-speex",
1604         "audio/x-svx",
1605         "audio/x-ttafile",
1606         "audio/x-vgm",
1607         "audio/x-voc",
1608         "audio/x-vorbis+ogg",
1609         "audio/x-w64",
1610         "audio/x-wav",
1611         "audio/x-wavpack",
1612         "audio/x-wavpack-correction",
1613         "video/3gpp",
1614         "video/mj2",
1615         "video/mp4",
1616         "video/mpeg",
1617         "video/mpegts",
1618         "video/ogg",
1619         "video/quicktime",
1620         "video/vivo",
1621         "video/webm",
1622         "video/x-cdxa",
1623         "video/x-dirac",
1624         "video/x-dv",
1625         "video/x-fli",
1626         "video/x-flv",
1627         "video/x-h263",
1628         "video/x-ivf",
1629         "video/x-m4v",
1630         "video/x-matroska",
1631         "video/x-mng",
1632         "video/x-ms-asf",
1633         "video/x-msvideo",
1634         "video/x-mve",
1635         "video/x-nuv",
1636         "video/x-vcd"
1637     };
1638
1639     for (unsigned i = 0; i < (sizeof(mimeTypes) / sizeof(*mimeTypes)); ++i)
1640         cache.add(String(mimeTypes[i]));
1641
1642     typeListInitialized = true;
1643     return cache;
1644 }
1645
1646 void MediaPlayerPrivateGStreamer::getSupportedTypes(HashSet<String>& types)
1647 {
1648     types = mimeTypeCache();
1649 }
1650
1651 MediaPlayer::SupportsType MediaPlayerPrivateGStreamer::supportsType(const String& type, const String& codecs, const KURL&)
1652 {
1653     if (type.isNull() || type.isEmpty())
1654         return MediaPlayer::IsNotSupported;
1655
1656     // spec says we should not return "probably" if the codecs string is empty
1657     if (mimeTypeCache().contains(type))
1658         return codecs.isEmpty() ? MediaPlayer::MayBeSupported : MediaPlayer::IsSupported;
1659     return MediaPlayer::IsNotSupported;
1660 }
1661
1662 void MediaPlayerPrivateGStreamer::setDownloadBuffering()
1663 {
1664     if (!m_playBin)
1665         return;
1666
1667     GstPlayFlags flags;
1668     g_object_get(m_playBin.get(), "flags", &flags, NULL);
1669
1670     // We don't want to stop downloading if we already started it.
1671     if (flags & GST_PLAY_FLAG_DOWNLOAD && m_readyState > MediaPlayer::HaveNothing && !m_resetPipeline)
1672         return;
1673
1674     bool shouldDownload = !isLiveStream() && m_preload == MediaPlayer::Auto;
1675     if (shouldDownload) {
1676         LOG_MEDIA_MESSAGE("Enabling on-disk buffering");
1677         g_object_set(m_playBin.get(), "flags", flags | GST_PLAY_FLAG_DOWNLOAD, NULL);
1678         m_fillTimer.startRepeating(0.2);
1679     } else {
1680         LOG_MEDIA_MESSAGE("Disabling on-disk buffering");
1681         g_object_set(m_playBin.get(), "flags", flags & ~GST_PLAY_FLAG_DOWNLOAD, NULL);
1682         m_fillTimer.stop();
1683     }
1684 }
1685
1686 void MediaPlayerPrivateGStreamer::setPreload(MediaPlayer::Preload preload)
1687 {
1688     if (preload == MediaPlayer::Auto && isLiveStream())
1689         return;
1690
1691     m_preload = preload;
1692     setDownloadBuffering();
1693
1694     if (m_delayingLoad && m_preload != MediaPlayer::None) {
1695         m_delayingLoad = false;
1696         commitLoad();
1697     }
1698 }
1699
1700 void MediaPlayerPrivateGStreamer::createAudioSink()
1701 {
1702     // Construct audio sink if pitch preserving is enabled.
1703     if (!m_preservesPitch)
1704         return;
1705
1706     if (!m_playBin)
1707         return;
1708
1709     GstElement* scale = gst_element_factory_make("scaletempo", 0);
1710     if (!scale) {
1711         GST_WARNING("Failed to create scaletempo");
1712         return;
1713     }
1714
1715     GstElement* convert = gst_element_factory_make("audioconvert", 0);
1716     GstElement* resample = gst_element_factory_make("audioresample", 0);
1717     GstElement* sink = gst_element_factory_make("autoaudiosink", 0);
1718
1719     m_autoAudioSink = sink;
1720
1721     g_signal_connect(sink, "child-added", G_CALLBACK(setAudioStreamPropertiesCallback), this);
1722
1723     GstElement* audioSink = gst_bin_new("audio-sink");
1724     gst_bin_add_many(GST_BIN(audioSink), scale, convert, resample, sink, NULL);
1725
1726     if (!gst_element_link_many(scale, convert, resample, sink, NULL)) {
1727         GST_WARNING("Failed to link audio sink elements");
1728         gst_object_unref(audioSink);
1729         return;
1730     }
1731
1732     GRefPtr<GstPad> pad = adoptGRef(gst_element_get_static_pad(scale, "sink"));
1733     gst_element_add_pad(audioSink, gst_ghost_pad_new("sink", pad.get()));
1734
1735     g_object_set(m_playBin.get(), "audio-sink", audioSink, NULL);
1736 }
1737
1738 void MediaPlayerPrivateGStreamer::createGSTPlayBin()
1739 {
1740     ASSERT(!m_playBin);
1741
1742     // gst_element_factory_make() returns a floating reference so
1743     // we should not adopt.
1744     m_playBin = gst_element_factory_make(gPlaybinName, "play");
1745     setStreamVolumeElement(GST_STREAM_VOLUME(m_playBin.get()));
1746
1747     GRefPtr<GstBus> bus = webkitGstPipelineGetBus(GST_PIPELINE(m_playBin.get()));
1748     gst_bus_add_signal_watch(bus.get());
1749     g_signal_connect(bus.get(), "message", G_CALLBACK(mediaPlayerPrivateMessageCallback), this);
1750
1751     g_object_set(m_playBin.get(), "mute", m_player->muted(), NULL);
1752
1753     g_signal_connect(m_playBin.get(), "notify::source", G_CALLBACK(mediaPlayerPrivateSourceChangedCallback), this);
1754     g_signal_connect(m_playBin.get(), "video-changed", G_CALLBACK(mediaPlayerPrivateVideoChangedCallback), this);
1755     g_signal_connect(m_playBin.get(), "audio-changed", G_CALLBACK(mediaPlayerPrivateAudioChangedCallback), this);
1756 #if ENABLE(VIDEO_TRACK) && defined(GST_API_VERSION_1)
1757     if (webkitGstCheckVersion(1, 1, 2)) {
1758         g_signal_connect(m_playBin.get(), "text-changed", G_CALLBACK(mediaPlayerPrivateTextChangedCallback), this);
1759
1760         GstElement* textCombiner = webkitTextCombinerNew();
1761         ASSERT(textCombiner);
1762         g_object_set(m_playBin.get(), "text-stream-combiner", textCombiner, NULL);
1763
1764         m_textAppSink = webkitTextSinkNew();
1765         ASSERT(m_textAppSink);
1766
1767         m_textAppSinkPad = adoptGRef(gst_element_get_static_pad(m_textAppSink.get(), "sink"));
1768         ASSERT(m_textAppSinkPad);
1769
1770         g_object_set(m_textAppSink.get(), "emit-signals", true, "enable-last-sample", false, "caps", gst_caps_new_empty_simple("text/vtt"), NULL);
1771         g_signal_connect(m_textAppSink.get(), "new-sample", G_CALLBACK(mediaPlayerPrivateNewTextSampleCallback), this);
1772
1773         g_object_set(m_playBin.get(), "text-sink", m_textAppSink.get(), NULL);
1774     }
1775 #endif
1776
1777     GstElement* videoElement = createVideoSink(m_playBin.get());
1778
1779     g_object_set(m_playBin.get(), "video-sink", videoElement, NULL);
1780
1781     GRefPtr<GstPad> videoSinkPad = adoptGRef(gst_element_get_static_pad(m_webkitVideoSink.get(), "sink"));
1782     if (videoSinkPad)
1783         g_signal_connect(videoSinkPad.get(), "notify::caps", G_CALLBACK(mediaPlayerPrivateVideoSinkCapsChangedCallback), this);
1784
1785     createAudioSink();
1786 }
1787
1788 void MediaPlayerPrivateGStreamer::simulateAudioInterruption()
1789 {
1790     GstMessage* message = gst_message_new_request_state(GST_OBJECT(m_playBin.get()), GST_STATE_PAUSED);
1791     gst_element_post_message(m_playBin.get(), message);
1792 }
1793
1794 }
1795
1796 #endif // USE(GSTREAMER)