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// Copyright 2020 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_ENCODED_VIDEO_FRAME_DELEGATE_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_ENCODED_VIDEO_FRAME_DELEGATE_H_
#include <stdint.h>
#include <memory>
#include "base/synchronization/lock.h"
#include "base/time/time.h"
#include "base/types/expected.h"
#include "third_party/blink/renderer/bindings/core/v8/serialization/serialized_script_value.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_rtc_encoded_video_frame_type.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/modules/peerconnection/peer_connection_util.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/thread_safe_ref_counted.h"
#include "third_party/webrtc/api/frame_transformer_interface.h"
#include "third_party/webrtc/api/video/video_frame_metadata.h"
namespace blink {
class DOMArrayBuffer;
// This class wraps a WebRTC video frame and allows making shallow
// copies. Its purpose is to support making RTCEncodedVideoFrames
// serializable in the same process.
class RTCEncodedVideoFrameDelegate
: public ThreadSafeRefCounted<RTCEncodedVideoFrameDelegate> {
public:
explicit RTCEncodedVideoFrameDelegate(
std::unique_ptr<webrtc::TransformableVideoFrameInterface> webrtc_frame);
V8RTCEncodedVideoFrameType::Enum Type() const;
uint32_t RtpTimestamp() const;
std::optional<webrtc::Timestamp> PresentationTimestamp() const;
DOMArrayBuffer* CreateDataBuffer(v8::Isolate* isolate) const;
void SetData(const DOMArrayBuffer* data);
std::optional<uint8_t> PayloadType() const;
std::optional<std::string> MimeType() const;
std::optional<webrtc::VideoFrameMetadata> GetMetadata() const;
std::optional<base::TimeTicks> ReceiveTime() const;
std::optional<CaptureTimeInfo> CaptureTime() const;
std::optional<base::TimeDelta> SenderCaptureTimeOffset() const;
base::expected<void, String> SetMetadata(
const webrtc::VideoFrameMetadata& metadata,
uint32_t rtpTimestamp);
std::unique_ptr<webrtc::TransformableVideoFrameInterface> PassWebRtcFrame();
std::unique_ptr<webrtc::TransformableVideoFrameInterface> CloneWebRtcFrame();
private:
V8RTCEncodedVideoFrameType::Enum ComputeType() const
EXCLUSIVE_LOCKS_REQUIRED(&lock_);
std::optional<base::TimeTicks> ComputeReceiveTime() const
EXCLUSIVE_LOCKS_REQUIRED(&lock_);
std::optional<CaptureTimeInfo> ComputeCaptureTime() const
EXCLUSIVE_LOCKS_REQUIRED(&lock_);
std::optional<base::TimeDelta> ComputeSenderCaptureTimeOffset() const
EXCLUSIVE_LOCKS_REQUIRED(&lock_);
mutable base::Lock lock_;
std::unique_ptr<webrtc::TransformableVideoFrameInterface> webrtc_frame_
GUARDED_BY(lock_);
struct Metadata {
V8RTCEncodedVideoFrameType::Enum frame_type =
V8RTCEncodedVideoFrameType::Enum::kEmpty;
std::optional<uint8_t> payload_type;
std::optional<std::string> mime_type;
std::optional<webrtc::VideoFrameMetadata> video_frame_metadata;
std::optional<base::TimeTicks> receive_time;
std::optional<CaptureTimeInfo> capture_time;
std::optional<base::TimeDelta> sender_capture_time_offset;
uint32_t rtp_timestamp = 0;
std::optional<webrtc::Timestamp> presentation_timestamp;
};
// This field is set after the frame is neutered (e.g., written to a stream or
// transferred).
Metadata post_neuter_metadata_;
};
class MODULES_EXPORT RTCEncodedVideoFramesAttachment
: public SerializedScriptValue::Attachment {
public:
static const void* const kAttachmentKey;
RTCEncodedVideoFramesAttachment() = default;
~RTCEncodedVideoFramesAttachment() override = default;
bool IsLockedToAgentCluster() const override {
return !encoded_video_frames_.empty();
}
Vector<scoped_refptr<RTCEncodedVideoFrameDelegate>>& EncodedVideoFrames() {
return encoded_video_frames_;
}
const Vector<scoped_refptr<RTCEncodedVideoFrameDelegate>>&
EncodedVideoFrames() const {
return encoded_video_frames_;
}
private:
Vector<scoped_refptr<RTCEncodedVideoFrameDelegate>> encoded_video_frames_;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_PEERCONNECTION_RTC_ENCODED_VIDEO_FRAME_DELEGATE_H_
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