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/*
* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef VIDEO_RTP_VIDEO_STREAM_RECEIVER_FRAME_TRANSFORMER_DELEGATE_H_
#define VIDEO_RTP_VIDEO_STREAM_RECEIVER_FRAME_TRANSFORMER_DELEGATE_H_
#include <memory>
#include "api/frame_transformer_interface.h"
#include "api/sequence_checker.h"
#include "modules/video_coding/frame_object.h"
#include "rtc_base/system/no_unique_address.h"
#include "rtc_base/thread.h"
namespace webrtc {
// Called back by RtpVideoStreamReceiverFrameTransformerDelegate on the network
// thread after transformation.
class RtpVideoFrameReceiver {
public:
virtual void ManageFrame(std::unique_ptr<RtpFrameObject> frame) = 0;
protected:
virtual ~RtpVideoFrameReceiver() = default;
};
// Delegates calls to FrameTransformerInterface to transform frames, and to
// RtpVideoStreamReceiver to manage transformed frames on the `network_thread_`.
class RtpVideoStreamReceiverFrameTransformerDelegate
: public TransformedFrameCallback {
public:
RtpVideoStreamReceiverFrameTransformerDelegate(
RtpVideoFrameReceiver* receiver,
rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
rtc::Thread* network_thread,
uint32_t ssrc);
void Init();
void Reset();
// Delegates the call to FrameTransformerInterface::TransformFrame.
void TransformFrame(std::unique_ptr<RtpFrameObject> frame);
// Implements TransformedFrameCallback. Can be called on any thread. Posts
// the transformed frame to be managed on the `network_thread_`.
void OnTransformedFrame(
std::unique_ptr<TransformableFrameInterface> frame) override;
// Delegates the call to RtpVideoFrameReceiver::ManageFrame on the
// `network_thread_`.
void ManageFrame(std::unique_ptr<TransformableFrameInterface> frame);
protected:
~RtpVideoStreamReceiverFrameTransformerDelegate() override = default;
private:
RTC_NO_UNIQUE_ADDRESS SequenceChecker network_sequence_checker_;
RtpVideoFrameReceiver* receiver_ RTC_GUARDED_BY(network_sequence_checker_);
rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_
RTC_GUARDED_BY(network_sequence_checker_);
rtc::Thread* const network_thread_;
const uint32_t ssrc_;
};
} // namespace webrtc
#endif // VIDEO_RTP_VIDEO_STREAM_RECEIVER_FRAME_TRANSFORMER_DELEGATE_H_
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