mirror of
https://github.com/mollyim/webrtc.git
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103 lines
3.8 KiB
C++
103 lines
3.8 KiB
C++
/*
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* Copyright (c) 2020 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "audio/channel_receive_frame_transformer_delegate.h"
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#include <utility>
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#include "rtc_base/buffer.h"
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namespace webrtc {
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namespace {
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class TransformableIncomingAudioFrame
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: public TransformableAudioFrameInterface {
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public:
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TransformableIncomingAudioFrame(rtc::ArrayView<const uint8_t> payload,
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const RTPHeader& header,
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uint32_t ssrc)
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: payload_(payload.data(), payload.size()),
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header_(header),
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ssrc_(ssrc) {}
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~TransformableIncomingAudioFrame() override = default;
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rtc::ArrayView<const uint8_t> GetData() const override { return payload_; }
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void SetData(rtc::ArrayView<const uint8_t> data) override {
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payload_.SetData(data.data(), data.size());
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}
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uint8_t GetPayloadType() const override { return header_.payloadType; }
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uint32_t GetSsrc() const override { return ssrc_; }
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uint32_t GetTimestamp() const override { return header_.timestamp; }
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const RTPHeader& GetHeader() const override { return header_; }
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rtc::ArrayView<const uint32_t> GetContributingSources() const override {
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return rtc::ArrayView<const uint32_t>(header_.arrOfCSRCs, header_.numCSRCs);
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}
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Direction GetDirection() const override { return Direction::kReceiver; }
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private:
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rtc::Buffer payload_;
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RTPHeader header_;
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uint32_t ssrc_;
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};
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} // namespace
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ChannelReceiveFrameTransformerDelegate::ChannelReceiveFrameTransformerDelegate(
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ReceiveFrameCallback receive_frame_callback,
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rtc::scoped_refptr<FrameTransformerInterface> frame_transformer,
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TaskQueueBase* channel_receive_thread)
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: receive_frame_callback_(receive_frame_callback),
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frame_transformer_(std::move(frame_transformer)),
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channel_receive_thread_(channel_receive_thread) {}
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void ChannelReceiveFrameTransformerDelegate::Init() {
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RTC_DCHECK_RUN_ON(&sequence_checker_);
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frame_transformer_->RegisterTransformedFrameCallback(
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rtc::scoped_refptr<TransformedFrameCallback>(this));
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}
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void ChannelReceiveFrameTransformerDelegate::Reset() {
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RTC_DCHECK_RUN_ON(&sequence_checker_);
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frame_transformer_->UnregisterTransformedFrameCallback();
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frame_transformer_ = nullptr;
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receive_frame_callback_ = ReceiveFrameCallback();
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}
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void ChannelReceiveFrameTransformerDelegate::Transform(
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rtc::ArrayView<const uint8_t> packet,
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const RTPHeader& header,
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uint32_t ssrc) {
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RTC_DCHECK_RUN_ON(&sequence_checker_);
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frame_transformer_->Transform(
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std::make_unique<TransformableIncomingAudioFrame>(packet, header, ssrc));
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}
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void ChannelReceiveFrameTransformerDelegate::OnTransformedFrame(
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std::unique_ptr<TransformableFrameInterface> frame) {
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rtc::scoped_refptr<ChannelReceiveFrameTransformerDelegate> delegate(this);
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channel_receive_thread_->PostTask(
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[delegate = std::move(delegate), frame = std::move(frame)]() mutable {
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delegate->ReceiveFrame(std::move(frame));
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});
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}
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void ChannelReceiveFrameTransformerDelegate::ReceiveFrame(
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std::unique_ptr<TransformableFrameInterface> frame) const {
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RTC_DCHECK_RUN_ON(&sequence_checker_);
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if (!receive_frame_callback_)
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return;
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RTC_CHECK_EQ(frame->GetDirection(),
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TransformableFrameInterface::Direction::kReceiver);
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auto* transformed_frame =
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static_cast<TransformableIncomingAudioFrame*>(frame.get());
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receive_frame_callback_(transformed_frame->GetData(),
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transformed_frame->GetHeader());
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}
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} // namespace webrtc
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