| /* |
| * 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" |
| |
| #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 |