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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.
*/
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASOURCE_SOURCE_BUFFER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASOURCE_SOURCE_BUFFER_H_
#include <memory>
#include "third_party/blink/public/platform/web_source_buffer_client.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/core/execution_context/context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/typed_arrays/array_buffer_view_helpers.h"
#include "third_party/blink/renderer/modules/event_target_modules.h"
#include "third_party/blink/renderer/modules/mediasource/track_default_list.h"
#include "third_party/blink/renderer/platform/scheduler/public/post_cancellable_task.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
class AudioTrackList;
class DOMArrayBuffer;
class DOMArrayBufferView;
class EventQueue;
class ExceptionState;
class MediaSource;
class TimeRanges;
class VideoTrackList;
class WebSourceBuffer;
class SourceBuffer final : public EventTargetWithInlineData,
public ActiveScriptWrappable<SourceBuffer>,
public ContextLifecycleObserver,
public WebSourceBufferClient {
USING_GARBAGE_COLLECTED_MIXIN(SourceBuffer);
DEFINE_WRAPPERTYPEINFO();
USING_PRE_FINALIZER(SourceBuffer, Dispose);
public:
static SourceBuffer* Create(std::unique_ptr<WebSourceBuffer>,
MediaSource*,
EventQueue*);
static const AtomicString& SegmentsKeyword();
static const AtomicString& SequenceKeyword();
SourceBuffer(std::unique_ptr<WebSourceBuffer>, MediaSource*, EventQueue*);
~SourceBuffer() override;
// SourceBuffer.idl methods
const AtomicString& mode() const { return mode_; }
void setMode(const AtomicString&, ExceptionState&);
bool updating() const { return updating_; }
TimeRanges* buffered(ExceptionState&) const;
WebTimeRanges buffered() const;
double timestampOffset() const;
void setTimestampOffset(double, ExceptionState&);
void appendBuffer(DOMArrayBuffer* data, ExceptionState&);
void appendBuffer(NotShared<DOMArrayBufferView> data, ExceptionState&);
void abort(ExceptionState&);
void remove(double start, double end, ExceptionState&);
void changeType(const String& type, ExceptionState&);
double appendWindowStart() const;
void setAppendWindowStart(double, ExceptionState&);
double appendWindowEnd() const;
void setAppendWindowEnd(double, ExceptionState&);
DEFINE_ATTRIBUTE_EVENT_LISTENER(updatestart, kUpdatestart)
DEFINE_ATTRIBUTE_EVENT_LISTENER(update, kUpdate)
DEFINE_ATTRIBUTE_EVENT_LISTENER(updateend, kUpdateend)
DEFINE_ATTRIBUTE_EVENT_LISTENER(error, kError)
DEFINE_ATTRIBUTE_EVENT_LISTENER(abort, kAbort)
TrackDefaultList* trackDefaults() const { return track_defaults_.Get(); }
void setTrackDefaults(TrackDefaultList*, ExceptionState&);
AudioTrackList& audioTracks();
VideoTrackList& videoTracks();
void RemovedFromMediaSource();
double HighestPresentationTimestamp();
// ScriptWrappable
bool HasPendingActivity() const final;
// ContextLifecycleObserver
void ContextDestroyed(ExecutionContext*) override;
// EventTarget interface
ExecutionContext* GetExecutionContext() const override;
const AtomicString& InterfaceName() const override;
// WebSourceBufferClient interface
bool InitializationSegmentReceived(const WebVector<MediaTrackInfo>&) override;
void NotifyParseWarning(const ParseWarning) override;
void Trace(blink::Visitor*) override;
private:
void Dispose();
bool IsRemoved() const;
void ScheduleEvent(const AtomicString& event_name);
bool PrepareAppend(double media_time, size_t new_data_size, ExceptionState&);
bool EvictCodedFrames(double media_time, size_t new_data_size);
void AppendBufferInternal(double media_time,
const unsigned char*,
unsigned,
ExceptionState&);
void AppendBufferAsyncPart();
void AppendError();
void RemoveAsyncPart();
void CancelRemove();
void AbortIfUpdating();
void RemoveMediaTracks();
// Returns MediaElement playback position (i.e. MediaElement.currentTime() )
// in seconds, or NaN if media element is not available.
double GetMediaTime();
const TrackDefault* GetTrackDefault(
const AtomicString& track_type,
const AtomicString& byte_stream_track_id) const;
AtomicString DefaultTrackLabel(
const AtomicString& track_type,
const AtomicString& byte_stream_track_id) const;
AtomicString DefaultTrackLanguage(
const AtomicString& track_type,
const AtomicString& byte_stream_track_id) const;
std::unique_ptr<WebSourceBuffer> web_source_buffer_;
// If any portion of an attached HTMLMediaElement (HTMLME) and the MediaSource
// Extensions (MSE) API is alive (having pending activity or traceable from a
// GC root), the whole group is not GC'ed. Here, using Member,
// instead of Member, because |source_|'s and |track_defaults_|'s wrappers
// need to remain alive at least to successfully dispatch any events enqueued
// by the behavior of the HTMLME+MSE API. It makes those wrappers remain alive
// as long as this SourceBuffer's wrapper is alive.
Member<MediaSource> source_;
Member<TrackDefaultList> track_defaults_;
Member<EventQueue> async_event_queue_;
AtomicString mode_;
bool updating_;
double timestamp_offset_;
Member<AudioTrackList> audio_tracks_;
Member<VideoTrackList> video_tracks_;
double append_window_start_;
double append_window_end_;
bool first_initialization_segment_received_;
Vector<unsigned char> pending_append_data_;
wtf_size_t pending_append_data_offset_;
TaskHandle append_buffer_async_task_handle_;
double pending_remove_start_;
double pending_remove_end_;
TaskHandle remove_async_task_handle_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASOURCE_SOURCE_BUFFER_H_