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f921d25320
Failing a DCHECK on a ChannelReceiver having its encoded transform set more than once contradicts the comment above - this can happen when reconfiguring a channel, eg as in the web platform test webrtc/recvonly-transceiver-can-become-sendrecv.https.html. It was added after the original code by a different author, and indeed the video side doesn't have such a check. Bug: chromium:1502781 Change-Id: Id36e52601da34ebc194ff058e4672046379f576e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/328560 Commit-Queue: Tony Herre <herre@google.com> Auto-Submit: Tony Herre <herre@google.com> Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41246}
81 lines
3.1 KiB
C++
81 lines
3.1 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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#ifndef AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_
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#define AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_
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#include <memory>
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#include <string>
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#include "api/frame_transformer_interface.h"
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#include "api/sequence_checker.h"
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#include "rtc_base/system/no_unique_address.h"
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#include "rtc_base/task_queue.h"
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#include "rtc_base/thread.h"
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namespace webrtc {
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// Delegates calls to FrameTransformerInterface to transform frames, and to
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// ChannelReceive to receive the transformed frames using the
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// `receive_frame_callback_` on the `channel_receive_thread_`.
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class ChannelReceiveFrameTransformerDelegate : public TransformedFrameCallback {
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public:
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using ReceiveFrameCallback =
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std::function<void(rtc::ArrayView<const uint8_t> packet,
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const RTPHeader& header)>;
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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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// Registers `this` as callback for `frame_transformer_`, to get the
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// transformed frames.
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void Init();
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// Unregisters and releases the `frame_transformer_` reference, and resets
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// `receive_frame_callback_` on `channel_receive_thread_`. Called from
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// ChannelReceive destructor to prevent running the callback on a dangling
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// channel.
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void Reset();
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// Delegates the call to FrameTransformerInterface::Transform, to transform
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// the frame asynchronously.
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void Transform(rtc::ArrayView<const uint8_t> packet,
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const RTPHeader& header,
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uint32_t ssrc,
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const std::string& codec_mime_type);
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// Implements TransformedFrameCallback. Can be called on any thread.
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void OnTransformedFrame(
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std::unique_ptr<TransformableFrameInterface> frame) override;
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void StartShortCircuiting() override;
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// Delegates the call to ChannelReceive::OnReceivedPayloadData on the
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// `channel_receive_thread_`, by calling `receive_frame_callback_`.
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void ReceiveFrame(std::unique_ptr<TransformableFrameInterface> frame) const;
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rtc::scoped_refptr<FrameTransformerInterface> FrameTransformer();
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protected:
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~ChannelReceiveFrameTransformerDelegate() override = default;
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private:
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RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_;
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ReceiveFrameCallback receive_frame_callback_
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RTC_GUARDED_BY(sequence_checker_);
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rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_
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RTC_GUARDED_BY(sequence_checker_);
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TaskQueueBase* const channel_receive_thread_;
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bool short_circuit_ RTC_GUARDED_BY(sequence_checker_) = false;
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};
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} // namespace webrtc
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#endif // AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_
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