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// Copyright 2018 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_TRANSCEIVER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_RTP_TRANSCEIVER_H_
#include <optional>
#include "third_party/blink/renderer/bindings/modules/v8/v8_rtc_rtp_codec_capability.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_rtc_rtp_transceiver_direction.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_rtc_rtp_transceiver_init.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/member.h"
#include "third_party/blink/renderer/platform/heap/visitor.h"
#include "third_party/blink/renderer/platform/peerconnection/rtc_rtp_transceiver_platform.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/webrtc/api/rtp_transceiver_interface.h"
namespace blink {
class RTCPeerConnection;
class RTCRtpHeaderExtensionCapability;
class RTCRtpReceiver;
class RTCRtpSender;
webrtc::RtpTransceiverInit ToRtpTransceiverInit(ExecutionContext* context,
const RTCRtpTransceiverInit*,
const String& kind);
class RTCRtpTransceiver final : public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
RTCRtpTransceiver(RTCPeerConnection* pc,
std::unique_ptr<RTCRtpTransceiverPlatform>,
RTCRtpSender*,
RTCRtpReceiver*);
// rtc_rtp_transceiver.idl
String mid() const;
RTCRtpSender* sender() const;
RTCRtpReceiver* receiver() const;
bool stopped() const;
// Enum type RTCRtpTransceiverDirection
V8RTCRtpTransceiverDirection direction() const;
void setDirection(const V8RTCRtpTransceiverDirection& direction,
ExceptionState&);
std::optional<V8RTCRtpTransceiverDirection> currentDirection() const;
void stop(ExceptionState&);
void setCodecPreferences(
const HeapVector<Member<RTCRtpCodecCapability>>& codecs,
ExceptionState& exception_state);
// Updates the transceiver attributes by fetching values from
// |platform_transceiver_|. This is made an explicit operation (rather than
// fetching the values from the |platform_transceivers_| directly every time
// an attribute is read) to make it possible to look at before/after snapshots
// of the attributes when a session description has been applied. This is
// necessary in order for blink to know when to process the addition/removal
// of remote tracks:
// https://w3c.github.io/webrtc-pc/#set-the-rtcsessiondescription.
void UpdateMembers();
// Stopped transceivers are removed, but we don't have access to removed
// transceivers' internal states. This method updates the states to reflect
// being stopped.
void OnTransceiverStopped();
RTCRtpTransceiverPlatform* platform_transceiver() const;
std::optional<webrtc::RtpTransceiverDirection> fired_direction() const;
bool DirectionHasSend() const;
bool DirectionHasRecv() const;
bool FiredDirectionHasRecv() const;
void setHeaderExtensionsToNegotiate(
const HeapVector<Member<RTCRtpHeaderExtensionCapability>>& extensions,
ExceptionState& exception_state);
HeapVector<Member<RTCRtpHeaderExtensionCapability>>
getHeaderExtensionsToNegotiate() const;
HeapVector<Member<RTCRtpHeaderExtensionCapability>>
getNegotiatedHeaderExtensions() const;
void Trace(Visitor*) const override;
private:
Member<RTCPeerConnection> pc_;
std::unique_ptr<RTCRtpTransceiverPlatform> platform_transceiver_;
Member<RTCRtpSender> sender_;
Member<RTCRtpReceiver> receiver_;
String mid_;
V8RTCRtpTransceiverDirection::Enum direction_;
std::optional<V8RTCRtpTransceiverDirection::Enum> current_direction_;
std::optional<webrtc::RtpTransceiverDirection> fired_direction_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_RTP_TRANSCEIVER_H_
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