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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 "audio/channel_receive_frame_transformer_delegate.h"
#include <utility>
#include "rtc_base/buffer.h"
#include "rtc_base/task_utils/to_queued_task.h"
namespace webrtc {
namespace {
class TransformableAudioFrame : public TransformableAudioFrameInterface {
public:
TransformableAudioFrame(rtc::ArrayView<const uint8_t> payload,
const RTPHeader& header,
uint32_t ssrc)
: payload_(payload.data(), payload.size()),
header_(header),
ssrc_(ssrc) {}
~TransformableAudioFrame() override = default;
rtc::ArrayView<const uint8_t> GetData() const override { return payload_; }
void SetData(rtc::ArrayView<const uint8_t> data) override {
payload_.SetData(data.data(), data.size());
}
uint32_t GetTimestamp() const override { return header_.timestamp; }
uint32_t GetSsrc() const override { return ssrc_; }
const RTPHeader& GetHeader() const override { return header_; }
private:
rtc::Buffer payload_;
RTPHeader header_;
uint32_t ssrc_;
};
} // namespace
ChannelReceiveFrameTransformerDelegate::ChannelReceiveFrameTransformerDelegate(
ReceiveFrameCallback receive_frame_callback,
rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
TaskQueueBase* channel_receive_thread)
: receive_frame_callback_(receive_frame_callback),
frame_transformer_(std::move(frame_transformer)),
channel_receive_thread_(channel_receive_thread) {}
void ChannelReceiveFrameTransformerDelegate::Init() {
RTC_DCHECK_RUN_ON(&sequence_checker_);
frame_transformer_->RegisterTransformedFrameCallback(
rtc::scoped_refptr<TransformedFrameCallback>(this));
}
void ChannelReceiveFrameTransformerDelegate::Reset() {
RTC_DCHECK_RUN_ON(&sequence_checker_);
frame_transformer_->UnregisterTransformedFrameCallback();
frame_transformer_ = nullptr;
receive_frame_callback_ = ReceiveFrameCallback();
}
void ChannelReceiveFrameTransformerDelegate::Transform(
rtc::ArrayView<const uint8_t> packet,
const RTPHeader& header,
uint32_t ssrc) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
frame_transformer_->Transform(
std::make_unique<TransformableAudioFrame>(packet, header, ssrc));
}
void ChannelReceiveFrameTransformerDelegate::OnTransformedFrame(
std::unique_ptr<TransformableFrameInterface> frame) {
rtc::scoped_refptr<ChannelReceiveFrameTransformerDelegate> delegate = this;
channel_receive_thread_->PostTask(ToQueuedTask(
[delegate = std::move(delegate), frame = std::move(frame)]() mutable {
delegate->ReceiveFrame(std::move(frame));
}));
}
void ChannelReceiveFrameTransformerDelegate::ReceiveFrame(
std::unique_ptr<TransformableFrameInterface> frame) const {
RTC_DCHECK_RUN_ON(&sequence_checker_);
if (!receive_frame_callback_)
return;
auto* transformed_frame = static_cast<TransformableAudioFrame*>(frame.get());
receive_frame_callback_(transformed_frame->GetData(),
transformed_frame->GetHeader());
}
} // namespace webrtc
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