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Diffstat (limited to 'third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h')
-rw-r--r-- | third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h new file mode 100644 index 0000000000..04ad7c4695 --- /dev/null +++ b/third_party/libwebrtc/audio/channel_receive_frame_transformer_delegate.h @@ -0,0 +1,74 @@ +/* + * 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. + */ + +#ifndef AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_ +#define AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_ + +#include <memory> + +#include "api/frame_transformer_interface.h" +#include "api/sequence_checker.h" +#include "rtc_base/system/no_unique_address.h" +#include "rtc_base/task_queue.h" +#include "rtc_base/thread.h" + +namespace webrtc { + +// Delegates calls to FrameTransformerInterface to transform frames, and to +// ChannelReceive to receive the transformed frames using the +// `receive_frame_callback_` on the `channel_receive_thread_`. +class ChannelReceiveFrameTransformerDelegate : public TransformedFrameCallback { + public: + using ReceiveFrameCallback = + std::function<void(rtc::ArrayView<const uint8_t> packet, + const RTPHeader& header)>; + ChannelReceiveFrameTransformerDelegate( + ReceiveFrameCallback receive_frame_callback, + rtc::scoped_refptr<FrameTransformerInterface> frame_transformer, + TaskQueueBase* channel_receive_thread); + + // Registers `this` as callback for `frame_transformer_`, to get the + // transformed frames. + void Init(); + + // Unregisters and releases the `frame_transformer_` reference, and resets + // `receive_frame_callback_` on `channel_receive_thread_`. Called from + // ChannelReceive destructor to prevent running the callback on a dangling + // channel. + void Reset(); + + // Delegates the call to FrameTransformerInterface::Transform, to transform + // the frame asynchronously. + void Transform(rtc::ArrayView<const uint8_t> packet, + const RTPHeader& header, + uint32_t ssrc); + + // Implements TransformedFrameCallback. Can be called on any thread. + void OnTransformedFrame( + std::unique_ptr<TransformableFrameInterface> frame) override; + + // Delegates the call to ChannelReceive::OnReceivedPayloadData on the + // `channel_receive_thread_`, by calling `receive_frame_callback_`. + void ReceiveFrame(std::unique_ptr<TransformableFrameInterface> frame) const; + + protected: + ~ChannelReceiveFrameTransformerDelegate() override = default; + + private: + RTC_NO_UNIQUE_ADDRESS SequenceChecker sequence_checker_; + ReceiveFrameCallback receive_frame_callback_ + RTC_GUARDED_BY(sequence_checker_); + rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_ + RTC_GUARDED_BY(sequence_checker_); + TaskQueueBase* const channel_receive_thread_; +}; + +} // namespace webrtc +#endif // AUDIO_CHANNEL_RECEIVE_FRAME_TRANSFORMER_DELEGATE_H_ |