Index: Source/modules/mediasource/SourceBuffer.cpp |
diff --git a/Source/modules/mediasource/SourceBuffer.cpp b/Source/modules/mediasource/SourceBuffer.cpp |
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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/SourceBuffer.h" |
+ |
+#include "core/dom/Event.h" |
+#include "core/dom/GenericEventQueue.h" |
+#include "core/html/TimeRanges.h" |
+#include "core/platform/Logging.h" |
+#include "core/platform/graphics/SourceBufferPrivate.h" |
+#include "modules/mediasource/MediaSource.h" |
+#include "wtf/ArrayBuffer.h" |
+#include "wtf/ArrayBufferView.h" |
+ |
+namespace WebCore { |
+ |
+PassRefPtr<SourceBuffer> SourceBuffer::create(PassOwnPtr<SourceBufferPrivate> sourceBufferPrivate, MediaSource* source, GenericEventQueue* asyncEventQueue) |
+{ |
+ RefPtr<SourceBuffer> sourceBuffer(adoptRef(new SourceBuffer(sourceBufferPrivate, source, asyncEventQueue))); |
+ sourceBuffer->suspendIfNeeded(); |
+ return sourceBuffer.release(); |
+} |
+ |
+SourceBuffer::SourceBuffer(PassOwnPtr<SourceBufferPrivate> sourceBufferPrivate, MediaSource* source, GenericEventQueue* asyncEventQueue) |
+ : ActiveDOMObject(source->scriptExecutionContext()) |
+ , m_private(sourceBufferPrivate) |
+ , m_source(source) |
+ , m_asyncEventQueue(asyncEventQueue) |
+ , m_updating(false) |
+ , m_timestampOffset(0) |
+ , m_appendBufferTimer(this, &SourceBuffer::appendBufferTimerFired) |
+{ |
+ ASSERT(m_private); |
+ ASSERT(m_source); |
+ ScriptWrappable::init(this); |
+} |
+ |
+SourceBuffer::~SourceBuffer() |
+{ |
+ ASSERT(isRemoved()); |
+} |
+ |
+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: |
+ // 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->openIfInEndedState(); |
+ |
+ // 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::appendBuffer(PassRefPtr<ArrayBuffer> data, ExceptionCode& ec) |
+{ |
+ // Section 3.2 appendBuffer() |
+ // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-SourceBuffer-appendBuffer-void-ArrayBufferView-data |
+ // 1. If data is null then throw an INVALID_ACCESS_ERR exception and abort these steps. |
+ if (!data) { |
+ ec = INVALID_ACCESS_ERR; |
+ return; |
+ } |
+ |
+ appendBufferInternal(static_cast<unsigned char*>(data->data()), data->byteLength(), ec); |
+} |
+ |
+void SourceBuffer::appendBuffer(PassRefPtr<ArrayBufferView> data, ExceptionCode& ec) |
+{ |
+ // Section 3.2 appendBuffer() |
+ // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-SourceBuffer-appendBuffer-void-ArrayBufferView-data |
+ // 1. If data is null then throw an INVALID_ACCESS_ERR exception and abort these steps. |
+ if (!data) { |
+ ec = INVALID_ACCESS_ERR; |
+ return; |
+ } |
+ |
+ appendBufferInternal(static_cast<unsigned char*>(data->baseAddress()), data->byteLength(), ec); |
+} |
+ |
+void SourceBuffer::abort(ExceptionCode& ec) |
+{ |
+ // Section 3.2 abort() method steps. |
+ // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-SourceBuffer-abort-void |
+ // 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() || !m_source->isOpen()) { |
+ ec = INVALID_STATE_ERR; |
+ return; |
+ } |
+ |
+ // 3. If the sourceBuffer.updating attribute equals true, then run the following steps: ... |
+ abortIfUpdating(); |
+ |
+ // 4. Run the reset parser state algorithm. |
+ m_private->abort(); |
+ |
+ // FIXME(229408) Add steps 5-6 update appendWindowStart & appendWindowEnd. |
+} |
+ |
+ |
+void SourceBuffer::abortIfUpdating() |
+{ |
+ // Section 3.2 abort() method step 3 substeps. |
+ // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-SourceBuffer-abort-void |
+ |
+ if (!m_updating) |
+ return; |
+ |
+ // 3.1. Abort the buffer append and stream append loop algorithms if they are running. |
+ m_appendBufferTimer.stop(); |
+ m_pendingAppendData.clear(); |
+ |
+ // 3.2. Set the updating attribute to false. |
+ m_updating = false; |
+ |
+ // 3.3. Queue a task to fire a simple event named abort at this SourceBuffer object. |
+ scheduleEvent(eventNames().abortEvent); |
+ |
+ // 3.4. Queue a task to fire a simple event named updateend at this SourceBuffer object. |
+ scheduleEvent(eventNames().updateendEvent); |
+} |
+ |
+void SourceBuffer::removedFromMediaSource() |
+{ |
+ if (isRemoved()) |
+ return; |
+ |
+ m_private->removedFromMediaSource(); |
+ m_source = 0; |
+ m_asyncEventQueue = 0; |
+} |
+ |
+bool SourceBuffer::hasPendingActivity() const |
+{ |
+ return m_source; |
+} |
+ |
+void SourceBuffer::stop() |
+{ |
+ m_appendBufferTimer.stop(); |
+} |
+ |
+ScriptExecutionContext* SourceBuffer::scriptExecutionContext() const |
+{ |
+ return ActiveDOMObject::scriptExecutionContext(); |
+} |
+ |
+const AtomicString& SourceBuffer::interfaceName() const |
+{ |
+ return eventNames().interfaceForSourceBuffer; |
+} |
+ |
+EventTargetData* SourceBuffer::eventTargetData() |
+{ |
+ return &m_eventTargetData; |
+} |
+ |
+EventTargetData* SourceBuffer::ensureEventTargetData() |
+{ |
+ return &m_eventTargetData; |
+} |
+ |
+bool SourceBuffer::isRemoved() const |
+{ |
+ return !m_source; |
+} |
+ |
+void SourceBuffer::scheduleEvent(const AtomicString& eventName) |
+{ |
+ ASSERT(m_asyncEventQueue); |
+ |
+ RefPtr<Event> event = Event::create(eventName, false, false); |
+ event->setTarget(this); |
+ |
+ m_asyncEventQueue->enqueueEvent(event.release()); |
+} |
+ |
+void SourceBuffer::appendBufferInternal(unsigned char* data, unsigned size, ExceptionCode& ec) |
+{ |
+ // Section 3.2 appendBuffer() |
+ // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-SourceBuffer-appendBuffer-void-ArrayBufferView-data |
+ |
+ // Step 1 is enforced by the caller. |
+ // 2. 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. |
+ // 3. If the updating attribute equals true, then throw an INVALID_STATE_ERR exception and abort these steps. |
+ if (isRemoved() || m_updating) { |
+ 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: ... |
+ m_source->openIfInEndedState(); |
+ |
+ // Steps 5-6 |
+ |
+ // 7. Add data to the end of the input buffer. |
+ m_pendingAppendData.append(data, size); |
+ |
+ // 8. Set the updating attribute to true. |
+ m_updating = true; |
+ |
+ // 9. Queue a task to fire a simple event named updatestart at this SourceBuffer object. |
+ scheduleEvent(eventNames().updatestartEvent); |
+ |
+ // 10. Asynchronously run the buffer append algorithm. |
+ m_appendBufferTimer.startOneShot(0); |
+} |
+ |
+void SourceBuffer::appendBufferTimerFired(Timer<SourceBuffer>*) |
+{ |
+ ASSERT(m_updating); |
+ |
+ // Section 3.5.4 Buffer Append Algorithm |
+ // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#sourcebuffer-buffer-append |
+ |
+ // 1. Run the segment parser loop algorithm. |
+ // Step 2 doesn't apply since we run Step 1 synchronously here. |
+ m_private->append(&m_pendingAppendData[0], m_pendingAppendData.size()); |
+ |
+ |
+ // 3. Set the updating attribute to false. |
+ m_updating = false; |
+ m_pendingAppendData.clear(); |
+ |
+ // 4. Queue a task to fire a simple event named update at this SourceBuffer object. |
+ scheduleEvent(eventNames().updateEvent); |
+ |
+ // 5. Queue a task to fire a simple event named updateend at this SourceBuffer object. |
+ scheduleEvent(eventNames().updateendEvent); |
+} |
+ |
+} // namespace WebCore |