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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
* Copyright (C) 2011 Ericsson AB. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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_MEDIASTREAM_MEDIA_STREAM_TRACK_IMPL_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_MEDIA_STREAM_TRACK_IMPL_H_
#include <memory>
#include "build/build_config.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_capture_handle.h"
#include "third_party/blink/renderer/modules/event_target_modules.h"
#include "third_party/blink/renderer/modules/mediastream/media_constraints.h"
#include "third_party/blink/renderer/modules/mediastream/media_stream_track.h"
#include "third_party/blink/renderer/modules/mediastream/speech_recognition_media_stream_audio_sink.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_set.h"
#include "third_party/blink/renderer/platform/mediastream/media_stream_descriptor.h"
#include "third_party/blink/renderer/platform/mediastream/media_stream_source.h"
#include "third_party/blink/renderer/platform/scheduler/public/frame_scheduler.h"
#include "third_party/blink/renderer/platform/wtf/forward.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
class AudioSourceProvider;
class ImageCapture;
class MediaTrackCapabilities;
class MediaTrackConstraints;
class MediaStream;
class MediaTrackSettings;
class ScriptState;
// Primary implementation of the MediaStreamTrack interface and idl type.
class MODULES_EXPORT MediaStreamTrackImpl : public MediaStreamTrack,
public MediaStreamSource::Observer {
USING_PRE_FINALIZER(MediaStreamTrackImpl, Dispose);
public:
// Create a MediaStreamTrackImpl of the appropriate type for the display
// surface type.
static MediaStreamTrack* Create(ExecutionContext* context,
MediaStreamComponent* component,
base::OnceClosure callback);
MediaStreamTrackImpl(ExecutionContext*, MediaStreamComponent*);
MediaStreamTrackImpl(ExecutionContext*,
MediaStreamComponent*,
base::OnceClosure callback);
MediaStreamTrackImpl(ExecutionContext*,
MediaStreamComponent*,
MediaStreamSource::ReadyState,
base::OnceClosure callback,
bool is_clone = false);
~MediaStreamTrackImpl() override;
// MediaStreamTrack
String kind() const override;
String id() const override;
String label() const override;
bool enabled() const override;
void setEnabled(bool) override;
bool muted() const override;
String ContentHint() const override;
void SetContentHint(const String&) override;
V8MediaStreamTrackState readyState() const override;
MediaStreamTrack* clone(ExecutionContext*) override;
void stopTrack(ExecutionContext*) override;
MediaTrackCapabilities* getCapabilities() const override;
MediaTrackConstraints* getConstraints() const override;
MediaTrackSettings* getSettings() const override;
V8UnionMediaStreamTrackAudioStatsOrMediaStreamTrackVideoStats* stats()
override;
CaptureHandle* getCaptureHandle() const override;
ScriptPromise<IDLUndefined> applyConstraints(
ScriptState*,
const MediaTrackConstraints*) override;
// These two functions are called when constraints have been successfully
// applied.
// Called from UserMediaRequest when it succeeds. It is not IDL-exposed.
// SetInitialConstraints() is expected to be called once when capture starts.
// SetConstraints() is called later, when changing the set of constraints.
void SetInitialConstraints(const MediaConstraints& constraints) override;
void SetConstraints(const MediaConstraints& constraints) override;
DEFINE_ATTRIBUTE_EVENT_LISTENER(mute, kMute)
DEFINE_ATTRIBUTE_EVENT_LISTENER(unmute, kUnmute)
DEFINE_ATTRIBUTE_EVENT_LISTENER(ended, kEnded)
DEFINE_ATTRIBUTE_EVENT_LISTENER(capturehandlechange, kCapturehandlechange)
DEFINE_ATTRIBUTE_EVENT_LISTENER(configurationchange, kConfigurationchange)
// Returns the enum value of the ready state.
MediaStreamSource::ReadyState GetReadyState() override {
return ready_state_;
}
MediaStreamComponent* Component() const override { return component_.Get(); }
bool Ended() const override;
void RegisterMediaStream(MediaStream*) override;
void UnregisterMediaStream(MediaStream*) override;
void RegisterSink(SpeechRecognitionMediaStreamAudioSink*) override;
// EventTarget
const AtomicString& InterfaceName() const override;
ExecutionContext* GetExecutionContext() const override;
void AddedEventListener(const AtomicString&,
RegisteredEventListener&) override;
// ScriptWrappable
bool HasPendingActivity() const final;
std::unique_ptr<AudioSourceProvider> CreateWebAudioSource(
int context_sample_rate,
base::TimeDelta platform_buffer_duration) override;
MediaStreamTrackPlatform::VideoFrameStats GetVideoFrameStats() const;
void TransferAudioFrameStatsTo(
MediaStreamTrackPlatform::AudioFrameStats& destination);
ImageCapture* GetImageCapture() override { return image_capture_.Get(); }
std::optional<const MediaStreamDevice> device() const override;
void BeingTransferred(const base::UnguessableToken& transfer_id) override;
bool TransferAllowed(String& message) const override;
void AddObserver(MediaStreamTrack::Observer*) override;
void Trace(Visitor*) const override;
std::optional<int> GetZoomLevelForTesting() const { return zoom_level_; }
bool IsCapturedSurfaceResolutionActive(
const MediaStreamTrackPlatform::Settings& platform_settings) const;
protected:
// Given a partially built MediaStreamTrackImpl, finishes the job of making it
// into a clone of |this|.
// Useful for sub-classes, as they need to clone both state from
// this class as well as of their own class.
void CloneInternal(MediaStreamTrackImpl*);
private:
friend class CanvasCaptureMediaStreamTrack;
friend class InternalsMediaStream;
void Dispose();
// MediaStreamTrack
void applyConstraints(ScriptPromiseResolver<IDLUndefined>*,
const MediaTrackConstraints*) override;
// MediaStreamSource::Observer
void SourceChangedState() override;
void SourceChangedCaptureConfiguration() override;
void SourceChangedCaptureHandle() override;
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_IOS)
void SourceChangedZoomLevel(int) override;
#endif
void PropagateTrackEnded();
void PropagateTrackEnabled(bool enabled);
void SendLogMessage(const WTF::String& message);
// Ensures that |feature_handle_for_scheduler_| is initialized.
void EnsureFeatureHandleForScheduler();
void SetConstraintsInternal(const MediaConstraints& constraints,
bool initial_values);
void setReadyState(MediaStreamSource::ReadyState ready_state);
// Callback used after getting the current image capture capabilities and
// settings to dispatch a configurationchange event if they differ from the
// old ones.
void MaybeDispatchConfigurationChange(bool has_changed);
// This handle notifies the scheduler about a live media stream track
// associated with a frame. The handle should be destroyed when the track
// is stopped.
FrameScheduler::SchedulingAffectingFeatureHandle
feature_handle_for_scheduler_;
// This handle notifies the scheduler about a live media stream track
// for the purpose of disabling/enabling BFCache. When there is a live stream
// track, the page should not be BFCached.
// TODO(crbug.com/1502395): Currently we intentionally use this handler for
// BFCache although its behavior is almost the same as the one above. The one
// above uses the WebRTC feature even though it's not necessarily related to
// Web RTC. Discuss with those who own the handler and merge the two handlers
// into one.
FrameScheduler::SchedulingAffectingFeatureHandle
feature_handle_for_scheduler_on_live_media_stream_track_;
MediaStreamSource::ReadyState ready_state_;
HeapHashSet<Member<MediaStream>> registered_media_streams_;
HeapHashSet<Member<SpeechRecognitionMediaStreamAudioSink>> registered_sinks_;
bool is_iterating_registered_media_streams_ = false;
const Member<MediaStreamComponent> component_;
Member<ImageCapture> image_capture_;
WeakMember<ExecutionContext> execution_context_;
HeapHashSet<WeakMember<MediaStreamTrack::Observer>> observers_;
bool muted_ = false;
std::optional<int> zoom_level_;
MediaConstraints constraints_;
std::optional<bool> suppress_local_audio_playback_setting_;
std::optional<bool> restrict_own_audio_setting_;
Member<V8UnionMediaStreamTrackAudioStatsOrMediaStreamTrackVideoStats> stats_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_MEDIASTREAM_MEDIA_STREAM_TRACK_IMPL_H_
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