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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "SourceBufferList.h"
#if ENABLE(MEDIA_SOURCE)
#include "Event.h"
#include "SourceBuffer.h"
namespace WebCore {
SourceBufferList::SourceBufferList(ScriptExecutionContext* context,
GenericEventQueue* asyncEventQueue)
: m_scriptExecutionContext(context)
, m_asyncEventQueue(asyncEventQueue)
, m_lastSourceBufferId(0)
{
}
unsigned long SourceBufferList::length() const
{
return m_list.size();
}
SourceBuffer* SourceBufferList::item(unsigned index) const
{
if (index >= m_list.size())
return 0;
return m_list[index].get();
}
void SourceBufferList::add(PassRefPtr<SourceBuffer> buffer)
{
m_list.append(buffer);
createAndFireEvent(eventNames().webkitaddsourcebufferEvent);
}
bool SourceBufferList::remove(SourceBuffer* buffer)
{
size_t index = m_list.find(buffer);
if (index == notFound)
return false;
buffer->clear();
m_list.remove(index);
createAndFireEvent(eventNames().webkitremovesourcebufferEvent);
return true;
}
void SourceBufferList::clear()
{
for (size_t i = 0; i < m_list.size(); ++i)
remove(m_list[i].get());
}
String SourceBufferList::generateUniqueId()
{
// Ensure a unique id. Until m_lastSourceBufferId wraps around (very unlikely),
// this loop will exit after one check. If m_lastSourceBufferId does wrap,
// this loop may run as many times as the size of m_list, but in most
// cases that should be less than 10. We may want to investigate a more
// efficient approach if many more SourceBuffers are allowed in the future.
size_t nextSourceBufferId = m_lastSourceBufferId + 1;
while (contains(nextSourceBufferId)) {
if (nextSourceBufferId == m_lastSourceBufferId)
return emptyString();
nextSourceBufferId++;
}
m_lastSourceBufferId = nextSourceBufferId;
return String::number(nextSourceBufferId);
}
bool SourceBufferList::contains(size_t id) const
{
for (size_t i = 0; i < m_list.size(); ++i) {
if (m_list[i]->id() == String::number(id))
return true;
}
return false;
}
void SourceBufferList::createAndFireEvent(const AtomicString& eventName)
{
ASSERT(m_asyncEventQueue);
RefPtr<Event> event = Event::create(eventName, false, false);
event->setTarget(this);
m_asyncEventQueue->enqueueEvent(event.release());
}
const AtomicString& SourceBufferList::interfaceName() const
{
return eventNames().interfaceForSourceBufferList;
}
ScriptExecutionContext* SourceBufferList::scriptExecutionContext() const
{
return m_scriptExecutionContext;
}
EventTargetData* SourceBufferList::eventTargetData()
{
return &m_eventTargetData;
}
EventTargetData* SourceBufferList::ensureEventTargetData()
{
return &m_eventTargetData;
}
} // namespace WebCore
#endif
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