| /* |
| * 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 "bindings/v8/ExceptionState.h" |
| #include "bindings/v8/ExceptionStatePlaceholder.h" |
| #include "core/dom/ExceptionCode.h" |
| #include "core/events/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" |
| #include "wtf/text/CString.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, ExceptionState& es) |
| { |
| 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()) { |
| es.throwUninformativeAndGenericDOMException(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)) { |
| es.throwUninformativeAndGenericDOMException(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()) { |
| es.throwUninformativeAndGenericDOMException(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, es); |
| |
| if (!sourceBufferPrivate) { |
| ASSERT(es.code() == NotSupportedError || es.code() == 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, ExceptionState& es) |
| { |
| 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) { |
| es.throwUninformativeAndGenericDOMException(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)) { |
| es.throwUninformativeAndGenericDOMException(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()) |
| 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 |