third_party/WebKit/Source/core/html/track/TrackBase.cpp

   1 /*
   2  * Copyright (C) 2013 Google Inc.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Redistributions in binary form must reproduce the above
  11  * copyright notice, this list of conditions and the following disclaimer
  12  * in the documentation and/or other materials provided with the
  13  * distribution.
  14  *     * Neither the name of Google Inc. nor the names of its
  15  * contributors may be used to endorse or promote products derived from
  16  * this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include "config.h"
  32 #include "core/html/track/TrackBase.h"
  33
  34 #include "core/html/HTMLMediaElement.h"
  35
  36 namespace blink {
  37
  38 static WebMediaPlayer::TrackId nextTrackId()
  39 {
  40     static WebMediaPlayer::TrackId next = 0;
  41     return ++next;
  42 }
  43
  44 TrackBase::TrackBase(Type type, const AtomicString& label, const AtomicString& language, const String& id)
  45     : m_trackId(nextTrackId())
  46     , m_type(type)
  47     , m_label(label)
  48     , m_language(language)
  49     , m_id(id)
  50     , m_mediaElement(nullptr)
  51 {
  52 }
  53
  54 TrackBase::~TrackBase()
  55 {
  56 #if !ENABLE(OILPAN)
  57     ASSERT(!m_mediaElement);
  58 #endif
  59 }
  60
  61 Node* TrackBase::owner() const
  62 {
  63     return m_mediaElement;
  64 }
  65
  66 DEFINE_TRACE(TrackBase)
  67 {
  68     visitor->trace(m_mediaElement);
  69 }
  70
  71 void TrackBase::setKind(const AtomicString& kind)
  72 {
  73     if (isValidKind(kind))
  74         m_kind = kind;
  75     else
  76         m_kind = defaultKind();
  77 }
  78
  79 } // namespace blink