/* * 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