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/*
* Copyright (C) 2013 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 "modules/mediasource/MediaSource.h"
#include "core/dom/ExceptionCodePlaceholder.h"
#include "core/dom/GenericEventQueue.h"
#include "core/html/TimeRanges.h"
#include "core/platform/ContentType.h"
#include "core/platform/Logging.h"
#include "core/platform/MIMETypeRegistry.h"
#include "core/platform/graphics/SourceBufferPrivate.h"
#include "modules/mediasource/MediaSourceRegistry.h"
#include "wtf/Uint8Array.h"
namespace WebCore {
PassRefPtr<MediaSource> MediaSource::create(ScriptExecutionContext* context)
{
RefPtr<MediaSource> mediaSource(adoptRef(new MediaSource(context)));
mediaSource->suspendIfNeeded();
return mediaSource.release();
}
MediaSource::MediaSource(ScriptExecutionContext* context)
: MediaSourceBase(context)
{
LOG(Media, "MediaSource::MediaSource %p", this);
ScriptWrappable::init(this);
m_sourceBuffers = SourceBufferList::create(scriptExecutionContext(), asyncEventQueue());
m_activeSourceBuffers = SourceBufferList::create(scriptExecutionContext(), asyncEventQueue());
}
MediaSource::~MediaSource()
{
LOG(Media, "MediaSource::~MediaSource %p", this);
ASSERT(isClosed());
}
SourceBuffer* MediaSource::addSourceBuffer(const String& type, ExceptionCode& ec)
{
LOG(Media, "MediaSource::addSourceBuffer(%s) %p", type.ascii().data(), this);
// 2.2 https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-MediaSource-addSourceBuffer-SourceBuffer-DOMString-type
// 1. If type is null or an empty then throw an InvalidAccessError exception and
// abort these steps.
if (type.isNull() || type.isEmpty()) {
ec = InvalidAccessError;
return 0;
}
// 2. If type contains a MIME type that is not supported ..., then throw a
// NotSupportedError exception and abort these steps.
if (!isTypeSupported(type)) {
ec = NotSupportedError;
return 0;
}
// 4. If the readyState attribute is not in the "open" state then throw an
// InvalidStateError exception and abort these steps.
if (!isOpen()) {
ec = InvalidStateError;
return 0;
}
// 5. Create a new SourceBuffer object and associated resources.
ContentType contentType(type);
Vector<String> codecs = contentType.codecs();
OwnPtr<SourceBufferPrivate> sourceBufferPrivate = createSourceBufferPrivate(contentType.type(), codecs, ec);
if (!sourceBufferPrivate) {
ASSERT(ec == NotSupportedError || ec == QuotaExceededError);
// 2. If type contains a MIME type that is not supported ..., then throw a NotSupportedError exception and abort these steps.
// 3. If the user agent can't handle any more SourceBuffer objects then throw a QuotaExceededError exception and abort these steps
return 0;
}
RefPtr<SourceBuffer> buffer = SourceBuffer::create(sourceBufferPrivate.release(), this, asyncEventQueue());
// 6. Add the new object to sourceBuffers and fire a addsourcebuffer on that object.
m_sourceBuffers->add(buffer);
m_activeSourceBuffers->add(buffer);
// 7. Return the new object to the caller.
return buffer.get();
}
void MediaSource::removeSourceBuffer(SourceBuffer* buffer, ExceptionCode& ec)
{
LOG(Media, "MediaSource::removeSourceBuffer() %p", this);
RefPtr<SourceBuffer> protect(buffer);
// 2.2 https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-MediaSource-removeSourceBuffer-void-SourceBuffer-sourceBuffer
// 1. If sourceBuffer is null then throw an InvalidAccessError exception and
// abort these steps.
if (!buffer) {
ec = InvalidAccessError;
return;
}
// 2. If sourceBuffer specifies an object that is not in sourceBuffers then
// throw a NotFoundError exception and abort these steps.
if (!m_sourceBuffers->length() || !m_sourceBuffers->contains(buffer)) {
ec = NotFoundError;
return;
}
// 3. If the sourceBuffer.updating attribute equals true, then run the following steps: ...
buffer->abortIfUpdating();
// Steps 4-9 are related to updating audioTracks, videoTracks, and textTracks which aren't implmented yet.
// FIXME(91649): support track selection
// 10. If sourceBuffer is in activeSourceBuffers, then remove sourceBuffer from activeSourceBuffers ...
m_activeSourceBuffers->remove(buffer);
// 11. Remove sourceBuffer from sourceBuffers and fire a removesourcebuffer event
// on that object.
m_sourceBuffers->remove(buffer);
// 12. Destroy all resources for sourceBuffer.
buffer->removedFromMediaSource();
}
void MediaSource::onReadyStateChange(const AtomicString& oldState, const AtomicString& newState)
{
if (isOpen()) {
scheduleEvent(eventNames().sourceopenEvent);
return;
}
if (oldState == openKeyword() && newState == endedKeyword()) {
scheduleEvent(eventNames().sourceendedEvent);
return;
}
ASSERT(isClosed());
m_activeSourceBuffers->clear();
// Clear SourceBuffer references to this object.
for (unsigned long i = 0; i < m_sourceBuffers->length(); ++i)
m_sourceBuffers->item(i)->removedFromMediaSource();
m_sourceBuffers->clear();
scheduleEvent(eventNames().sourcecloseEvent);
}
Vector<RefPtr<TimeRanges> > MediaSource::activeRanges() const
{
Vector<RefPtr<TimeRanges> > activeRanges(m_activeSourceBuffers->length());
for (size_t i = 0; i < m_activeSourceBuffers->length(); ++i)
activeRanges[i] = m_activeSourceBuffers->item(i)->buffered(ASSERT_NO_EXCEPTION);
return activeRanges;
}
bool MediaSource::isTypeSupported(const String& type)
{
LOG(Media, "MediaSource::isTypeSupported(%s)", type.ascii().data());
// Section 2.2 isTypeSupported() method steps.
// https://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html#widl-MediaSource-isTypeSupported-boolean-DOMString-type
// 1. If type is an empty string, then return false.
if (type.isNull() || type.isEmpty())
return false;
ContentType contentType(type);
String codecs = contentType.parameter("codecs");
// 2. If type does not contain a valid MIME type string, then return false.
if (contentType.type().isEmpty() || codecs.isEmpty())
return false;
// 3. If type contains a media type or media subtype that the MediaSource does not support, then return false.
// 4. If type contains at a codec that the MediaSource does not support, then return false.
// 5. If the MediaSource does not support the specified combination of media type, media subtype, and codecs then return false.
// 6. Return true.
return MIMETypeRegistry::isSupportedMediaSourceMIMEType(contentType.type(), codecs);
}
const AtomicString& MediaSource::interfaceName() const
{
return eventNames().interfaceForMediaSource;
}
} // namespace WebCore
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