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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_RTP_SCRIPT_TRANSFORM_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_RTP_SCRIPT_TRANSFORM_H_
#include <optional>
#include "base/thread_annotations.h"
#include "third_party/blink/renderer/bindings/core/v8/script_value.h"
#include "third_party/blink/renderer/core/workers/dedicated_worker.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/modules/peerconnection/rtc_rtp_script_transformer.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_vector.h"
#include "third_party/blink/renderer/platform/heap/cross_thread_handle.h"
#include "third_party/blink/renderer/platform/heap/cross_thread_persistent.h"
#include "third_party/blink/renderer/platform/peerconnection/rtc_encoded_audio_stream_transformer.h"
#include "third_party/blink/renderer/platform/peerconnection/rtc_encoded_video_stream_transformer.h"
namespace blink {
class ExceptionState;
class ScriptState;
class RTCRtpReceiver;
class MODULES_EXPORT RTCRtpScriptTransform : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
enum class SendKeyFrameRequestResult {
kSuccess,
kNoReceiver,
kNoVideo,
kTrackEnded,
kInvalidState
};
static RTCRtpScriptTransform* Create(ScriptState*,
DedicatedWorker* worker,
ExceptionState&);
static RTCRtpScriptTransform* Create(ScriptState*,
DedicatedWorker* worker,
const ScriptValue& message,
ExceptionState&);
static RTCRtpScriptTransform* Create(ScriptState*,
DedicatedWorker* worker,
const ScriptValue& message,
HeapVector<ScriptObject> transfer,
ExceptionState&);
RTCRtpScriptTransform() = default;
~RTCRtpScriptTransform() override = default;
// Called after the RTCTransformEvent is fired.
void SetRtpTransformer(
CrossThreadWeakHandle<RTCRtpScriptTransformer>,
scoped_refptr<base::SingleThreadTaskRunner> transformer_task_runner);
// Called when this transform is assigned to an RTCRtpSender or
// RTCRtpReceiver.
void CreateAudioUnderlyingSourceAndSink(
WTF::CrossThreadOnceClosure disconnect_callback_source,
scoped_refptr<blink::RTCEncodedAudioStreamTransformer::Broker>
encoded_audio_transformer);
void CreateVideoUnderlyingSourceAndSink(
WTF::CrossThreadOnceClosure disconnect_callback_source,
scoped_refptr<blink::RTCEncodedVideoStreamTransformer::Broker>
encoded_video_transformer);
void Attach() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
is_attached_ = true;
}
void AttachToReceiver(RTCRtpReceiver*);
bool IsAttached() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return is_attached_;
}
void Detach();
void CreateVideoUnderlyingSink(
scoped_refptr<blink::RTCEncodedVideoStreamTransformer::Broker>
encoded_video_transformer);
void CreateAudioUnderlyingSink(
scoped_refptr<blink::RTCEncodedAudioStreamTransformer::Broker>
encoded_audio_transformer);
void SendKeyFrameRequestToReceiver(
CrossThreadFunction<void(const SendKeyFrameRequestResult)> callback);
RTCRtpScriptTransform::SendKeyFrameRequestResult
HandleSendKeyFrameRequestResults();
void Trace(Visitor*) const override;
private:
// These methods post a task to the worker to set up an
// RTCRtpScriptTransformer. They are called when the RTCRtpScriptTransformer
// is assigned to a sender or receiver.
void SetUpAudioRtpTransformer(
WTF::CrossThreadOnceClosure disconnect_callback_source,
scoped_refptr<blink::RTCEncodedAudioStreamTransformer::Broker>);
void SetUpVideoRtpTransformer(
WTF::CrossThreadOnceClosure disconnect_callback_source,
scoped_refptr<blink::RTCEncodedVideoStreamTransformer::Broker>);
SEQUENCE_CHECKER(sequence_checker_);
std::optional<CrossThreadWeakHandle<RTCRtpScriptTransformer>> rtp_transformer_
GUARDED_BY_CONTEXT(sequence_checker_);
scoped_refptr<base::SingleThreadTaskRunner> rtp_transformer_task_runner_
GUARDED_BY_CONTEXT(sequence_checker_);
// These fields are used to store the callbacks only if the
// RTCRtpScriptTransformer has not been created/set yet. The callbacks will be
// invoked once the RTCRtpScriptTransformer becomes available.
WTF::CrossThreadOnceClosure disconnect_callback_source_
GUARDED_BY_CONTEXT(sequence_checker_);
scoped_refptr<blink::RTCEncodedAudioStreamTransformer::Broker>
encoded_audio_transformer_ GUARDED_BY_CONTEXT(sequence_checker_);
scoped_refptr<blink::RTCEncodedVideoStreamTransformer::Broker>
encoded_video_transformer_ GUARDED_BY_CONTEXT(sequence_checker_);
bool is_attached_ GUARDED_BY_CONTEXT(sequence_checker_) = false;
WeakMember<RTCRtpReceiver> receiver_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_RTP_SCRIPT_TRANSFORM_H_
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