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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.
*/
#include "modules/rtp_rtcp/source/rtp_sender_video_frame_transformer_delegate.h"
#include <utility>
#include <vector>
#include "absl/memory/memory.h"
#include "modules/rtp_rtcp/source/rtp_descriptor_authentication.h"
#include "modules/rtp_rtcp/source/rtp_sender_video.h"
#include "rtc_base/task_utils/to_queued_task.h"
namespace webrtc {
namespace {
class TransformableVideoSenderFrame : public TransformableVideoFrameInterface {
public:
TransformableVideoSenderFrame(
const EncodedImage& encoded_image,
const RTPVideoHeader& video_header,
int payload_type,
absl::optional<VideoCodecType> codec_type,
uint32_t rtp_timestamp,
absl::optional<int64_t> expected_retransmission_time_ms,
uint32_t ssrc)
: encoded_data_(encoded_image.GetEncodedData()),
header_(video_header),
metadata_(header_),
frame_type_(encoded_image._frameType),
payload_type_(payload_type),
codec_type_(codec_type),
timestamp_(rtp_timestamp),
capture_time_ms_(encoded_image.capture_time_ms_),
expected_retransmission_time_ms_(expected_retransmission_time_ms),
ssrc_(ssrc) {}
~TransformableVideoSenderFrame() override = default;
// Implements TransformableVideoFrameInterface.
rtc::ArrayView<const uint8_t> GetData() const override {
return *encoded_data_;
}
void SetData(rtc::ArrayView<const uint8_t> data) override {
encoded_data_ = EncodedImageBuffer::Create(data.data(), data.size());
}
uint32_t GetTimestamp() const override { return timestamp_; }
uint32_t GetSsrc() const override { return ssrc_; }
bool IsKeyFrame() const override {
return frame_type_ == VideoFrameType::kVideoFrameKey;
}
std::vector<uint8_t> GetAdditionalData() const override {
return RtpDescriptorAuthentication(header_);
}
const VideoFrameMetadata& GetMetadata() const override { return metadata_; }
const RTPVideoHeader& GetHeader() const { return header_; }
int GetPayloadType() const { return payload_type_; }
absl::optional<VideoCodecType> GetCodecType() const { return codec_type_; }
int64_t GetCaptureTimeMs() const { return capture_time_ms_; }
const absl::optional<int64_t>& GetExpectedRetransmissionTimeMs() const {
return expected_retransmission_time_ms_;
}
private:
rtc::scoped_refptr<EncodedImageBufferInterface> encoded_data_;
const RTPVideoHeader header_;
const VideoFrameMetadata metadata_;
const VideoFrameType frame_type_;
const int payload_type_;
const absl::optional<VideoCodecType> codec_type_ = absl::nullopt;
const uint32_t timestamp_;
const int64_t capture_time_ms_;
const absl::optional<int64_t> expected_retransmission_time_ms_;
const uint32_t ssrc_;
};
} // namespace
RTPSenderVideoFrameTransformerDelegate::RTPSenderVideoFrameTransformerDelegate(
RTPSenderVideo* sender,
rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
uint32_t ssrc,
TaskQueueBase* send_transport_queue)
: sender_(sender),
frame_transformer_(std::move(frame_transformer)),
ssrc_(ssrc),
send_transport_queue_(send_transport_queue) {}
void RTPSenderVideoFrameTransformerDelegate::Init() {
frame_transformer_->RegisterTransformedFrameSinkCallback(
rtc::scoped_refptr<TransformedFrameCallback>(this), ssrc_);
}
bool RTPSenderVideoFrameTransformerDelegate::TransformFrame(
int payload_type,
absl::optional<VideoCodecType> codec_type,
uint32_t rtp_timestamp,
const EncodedImage& encoded_image,
RTPVideoHeader video_header,
absl::optional<int64_t> expected_retransmission_time_ms) {
if (!encoder_queue_) {
// Save the current task queue to post the transformed frame for sending
// once it is transformed. When there is no current task queue, i.e.
// encoding is done on an external thread (for example in the case of
// hardware encoders), use the send transport queue instead.
TaskQueueBase* current = TaskQueueBase::Current();
encoder_queue_ = current ? current : send_transport_queue_;
}
frame_transformer_->Transform(std::make_unique<TransformableVideoSenderFrame>(
encoded_image, video_header, payload_type, codec_type, rtp_timestamp,
expected_retransmission_time_ms, ssrc_));
return true;
}
void RTPSenderVideoFrameTransformerDelegate::OnTransformedFrame(
std::unique_ptr<TransformableFrameInterface> frame) {
MutexLock lock(&sender_lock_);
// The encoder queue gets destroyed after the sender; as long as the sender is
// alive, it's safe to post.
if (!sender_)
return;
rtc::scoped_refptr<RTPSenderVideoFrameTransformerDelegate> delegate = this;
encoder_queue_->PostTask(ToQueuedTask(
[delegate = std::move(delegate), frame = std::move(frame)]() mutable {
delegate->SendVideo(std::move(frame));
}));
}
void RTPSenderVideoFrameTransformerDelegate::SendVideo(
std::unique_ptr<TransformableFrameInterface> transformed_frame) const {
RTC_CHECK(encoder_queue_->IsCurrent());
MutexLock lock(&sender_lock_);
if (!sender_)
return;
auto* transformed_video_frame =
static_cast<TransformableVideoSenderFrame*>(transformed_frame.get());
sender_->SendVideo(
transformed_video_frame->GetPayloadType(),
transformed_video_frame->GetCodecType(),
transformed_video_frame->GetTimestamp(),
transformed_video_frame->GetCaptureTimeMs(),
transformed_video_frame->GetData(),
transformed_video_frame->GetHeader(),
transformed_video_frame->GetExpectedRetransmissionTimeMs());
}
void RTPSenderVideoFrameTransformerDelegate::SetVideoStructureUnderLock(
const FrameDependencyStructure* video_structure) {
MutexLock lock(&sender_lock_);
RTC_CHECK(sender_);
sender_->SetVideoStructureAfterTransformation(video_structure);
}
void RTPSenderVideoFrameTransformerDelegate::SetVideoLayersAllocationUnderLock(
VideoLayersAllocation allocation) {
MutexLock lock(&sender_lock_);
RTC_CHECK(sender_);
sender_->SetVideoLayersAllocationAfterTransformation(std::move(allocation));
}
void RTPSenderVideoFrameTransformerDelegate::Reset() {
frame_transformer_->UnregisterTransformedFrameSinkCallback(ssrc_);
frame_transformer_ = nullptr;
{
MutexLock lock(&sender_lock_);
sender_ = nullptr;
}
}
} // namespace webrtc
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