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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 "SourceBuffer.h"
#if ENABLE(MEDIA_SOURCE)
#include "MediaSource.h"
#include "SourceBufferPrivate.h"
#include "TimeRanges.h"
#include <wtf/Uint8Array.h>
namespace WebCore {
PassRefPtr<SourceBuffer> SourceBuffer::create(PassOwnPtr<SourceBufferPrivate> sourceBufferPrivate, PassRefPtr<MediaSource> source)
{
return adoptRef(new SourceBuffer(sourceBufferPrivate, source));
}
SourceBuffer::SourceBuffer(PassOwnPtr<SourceBufferPrivate> sourceBufferPrivate, PassRefPtr<MediaSource> source)
: m_private(sourceBufferPrivate)
, m_source(source)
, m_timestampOffset(0)
{
ASSERT(m_private);
ASSERT(m_source);
}
SourceBuffer::~SourceBuffer()
{
}
PassRefPtr<TimeRanges> SourceBuffer::buffered(ExceptionCode& ec) const
{
// Section 3.1 buffered attribute steps.
// 1. If this object has been removed from the sourceBuffers attribute of the parent media source then throw an
// INVALID_STATE_ERR exception and abort these steps.
if (isRemoved()) {
ec = INVALID_STATE_ERR;
return 0;
}
// 2. Return a new static normalized TimeRanges object for the media segments buffered.
return m_private->buffered();
}
double SourceBuffer::timestampOffset() const
{
return m_timestampOffset;
}
void SourceBuffer::setTimestampOffset(double offset, ExceptionCode& ec)
{
// Section 3.1 timestampOffset attribute setter steps.
// 1. If this object has been removed from the sourceBuffers attribute of the parent media source then throw an
// INVALID_STATE_ERR exception and abort these steps.
if (isRemoved()) {
ec = INVALID_STATE_ERR;
return;
}
// 4. If the readyState attribute of the parent media source is in the "ended" state then run the following steps:
if (isEnded()) {
// 4.1 Set the readyState attribute of the parent media source to "open"
// 4.2 Queue a task to fire a simple event named sourceopen at the parent media source.
m_source->setReadyState(MediaSource::openKeyword());
}
// 5. If this object is waiting for the end of a media segment to be appended, then throw an INVALID_STATE_ERR
// and abort these steps.
if (!m_private->setTimestampOffset(offset)) {
ec = INVALID_STATE_ERR;
return;
}
// 6. Update the attribute to the new value.
m_timestampOffset = offset;
}
void SourceBuffer::append(PassRefPtr<Uint8Array> data, ExceptionCode& ec)
{
// SourceBuffer.append() steps from October 1st version of the Media Source Extensions spec.
// https://dvcs.w3.org/hg/html-media/raw-file/7bab66368f2c/media-source/media-source.html#dom-append
// 2. If data is null then throw an INVALID_ACCESS_ERR exception and abort these steps.
if (!data) {
ec = INVALID_ACCESS_ERR;
return;
}
// 3. If this object has been removed from the sourceBuffers attribute of media source then throw
// an INVALID_STATE_ERR exception and abort these steps.
if (isRemoved()) {
ec = INVALID_STATE_ERR;
return;
}
// 5. If the readyState attribute of media source is in the "ended" state then run the following steps:
if (isEnded()) {
// 5.1. Set the readyState attribute of media source to "open"
// 5.2. Queue a task to fire a simple event named sourceopen at media source.
m_source->setReadyState(MediaSource::openKeyword());
}
// Steps 6 & beyond are handled by the private implementation.
m_private->append(data->data(), data->length());
}
void SourceBuffer::abort(ExceptionCode& ec)
{
// Section 3.2 abort() method steps.
// 1. If this object has been removed from the sourceBuffers attribute of the parent media source
// then throw an INVALID_STATE_ERR exception and abort these steps.
// 2. If the readyState attribute of the parent media source is not in the "open" state
// then throw an INVALID_STATE_ERR exception and abort these steps.
if (isRemoved() || !isOpen()) {
ec = INVALID_STATE_ERR;
return;
}
// 4. Run the reset parser state algorithm.
m_private->abort();
}
void SourceBuffer::removedFromMediaSource()
{
if (isRemoved())
return;
m_private->removedFromMediaSource();
m_source.clear();
}
bool SourceBuffer::isRemoved() const
{
return !m_source;
}
bool SourceBuffer::isOpen() const
{
ASSERT(m_source);
return m_source->readyState() == MediaSource::openKeyword();
}
bool SourceBuffer::isEnded() const
{
ASSERT(m_source);
return m_source->readyState() == MediaSource::endedKeyword();
}
} // namespace WebCore
#endif
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