9a478b527d
This change switches the sequence used by the FrameCadenceAdapter to be the encoder_queue, enabling VideoStreamEncoder::OnFrame to be invoked directly on the encoder_queue and eliminates the contained PostTasks. Bug: chromium:1255737 Change-Id: Ib86fc96ad2be9a38585fef2535855e3f9cc7e57c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/238171 Commit-Queue: Markus Handell <handellm@webrtc.org> Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35380}
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
/*
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* Copyright (c) 2021 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 VIDEO_FRAME_CADENCE_ADAPTER_H_
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#define VIDEO_FRAME_CADENCE_ADAPTER_H_
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#include <memory>
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#include "api/task_queue/task_queue_base.h"
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#include "api/video/video_frame.h"
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#include "api/video/video_sink_interface.h"
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#include "rtc_base/synchronization/mutex.h"
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#include "rtc_base/thread_annotations.h"
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#include "system_wrappers/include/clock.h"
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namespace webrtc {
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// A sink adapter implementing mutations to the received frame cadence.
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// With the exception of the constructor and the methods overridden in
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// VideoSinkInterface, the rest of the interface to this class (including dtor)
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// needs to happen on the queue passed in Create.
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class FrameCadenceAdapterInterface
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: public rtc::VideoSinkInterface<VideoFrame> {
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public:
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// Callback interface used to inform instance owners.
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class Callback {
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public:
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virtual ~Callback() = default;
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// Called when a frame arrives on the |queue| specified in Create.
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//
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// The |post_time| parameter indicates the current time sampled when
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// FrameCadenceAdapterInterface::OnFrame was called.
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//
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// |frames_scheduled_for_processing| indicates how many frames that have
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// been scheduled for processing. During sequential conditions where
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// FrameCadenceAdapterInterface::OnFrame is invoked and subsequently ending
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// up in this callback, this value will read 1. Otherwise if the
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// |queue| gets stalled for some reason, the value will increase
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// beyond 1.
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virtual void OnFrame(Timestamp post_time,
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int frames_scheduled_for_processing,
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const VideoFrame& frame) = 0;
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// Called when the source has discarded a frame.
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virtual void OnDiscardedFrame() = 0;
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};
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// Factory function creating a production instance. Deletion of the returned
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// instance needs to happen on the same sequence that Create() was called on.
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// Frames arriving in FrameCadenceAdapterInterface::OnFrame are posted to
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// Callback::OnFrame on the |queue|.
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static std::unique_ptr<FrameCadenceAdapterInterface> Create(
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Clock* clock,
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TaskQueueBase* queue);
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// Call before using the rest of the API.
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virtual void Initialize(Callback* callback) = 0;
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// Pass true in |enabled| as a prerequisite to enable zero-hertz operation.
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virtual void SetZeroHertzModeEnabled(bool enabled) = 0;
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};
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} // namespace webrtc
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#endif // VIDEO_FRAME_CADENCE_ADAPTER_H_
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