54 lines
2.0 KiB
C
54 lines
2.0 KiB
C
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/*
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* Copyright (c) 2016 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 WEBRTC_MEDIA_BASE_VIDEOSOURCEINTERFACE_H_
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#define WEBRTC_MEDIA_BASE_VIDEOSOURCEINTERFACE_H_
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#include "webrtc/media/base/videosinkinterface.h"
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#include "webrtc/base/optional.h"
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namespace rtc {
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// VideoSinkWants is used for notifying the source of properties a video frame
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// should have when it is delivered to a certain sink.
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struct VideoSinkWants {
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// Tells the source whether the sink wants frames with rotation applied.
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// By default, any rotation must be applied by the sink.
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bool rotation_applied = false;
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// Tells the source that the sink only wants black frames.
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bool black_frames = false;
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// Tells the source the maximum number of pixels the sink wants.
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rtc::Optional<int> max_pixel_count;
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// Like |max_pixel_count| but relative to the given value. The source is
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// requested to produce frames with a resolution one "step up" from the given
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// value. In practice, this means that the sink can consume this amount of
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// pixels but wants more and the source should produce a resolution one
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// "step" higher than this but not higher.
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rtc::Optional<int> max_pixel_count_step_up;
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};
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template <typename VideoFrameT>
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class VideoSourceInterface {
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public:
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virtual void AddOrUpdateSink(VideoSinkInterface<VideoFrameT>* sink,
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const VideoSinkWants& wants) = 0;
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// RemoveSink must guarantee that at the time the method returns,
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// there is no current and no future calls to VideoSinkInterface::OnFrame.
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virtual void RemoveSink(VideoSinkInterface<VideoFrameT>* sink) = 0;
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protected:
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virtual ~VideoSourceInterface() {}
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};
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} // namespace rtc
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#endif // WEBRTC_MEDIA_BASE_VIDEOSOURCEINTERFACE_H_
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