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Side by Side Diff: media/capture/video/video_capture_device.h

Issue 2595853003: Revert of [Mojo Video Capture] Decouple VCController from VCBufferPool and VCDeviceClient (Closed)
Patch Set: Created 3 years, 12 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 // 4 //
5 // VideoCaptureDevice is the abstract base class for realizing video capture 5 // VideoCaptureDevice is the abstract base class for realizing video capture
6 // device support in Chromium. It provides the interface for OS dependent 6 // device support in Chromium. It provides the interface for OS dependent
7 // implementations. 7 // implementations.
8 // The class is created and functions are invoked on a thread owned by 8 // The class is created and functions are invoked on a thread owned by
9 // VideoCaptureManager. Capturing is done on other threads, depending on the OS 9 // VideoCaptureManager. Capturing is done on other threads, depending on the OS
10 // specific implementation. 10 // specific implementation.
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34 #include "media/capture/video_capture_types.h" 34 #include "media/capture/video_capture_types.h"
35 #include "mojo/public/cpp/bindings/array.h" 35 #include "mojo/public/cpp/bindings/array.h"
36 #include "ui/gfx/gpu_memory_buffer.h" 36 #include "ui/gfx/gpu_memory_buffer.h"
37 37
38 namespace tracked_objects { 38 namespace tracked_objects {
39 class Location; 39 class Location;
40 } // namespace tracked_objects 40 } // namespace tracked_objects
41 41
42 namespace media { 42 namespace media {
43 43
44 class CAPTURE_EXPORT FrameBufferPool {
45 public:
46 virtual ~FrameBufferPool() {}
47
48 virtual void SetBufferHold(int buffer_id) = 0;
49 virtual void ReleaseBufferHold(int buffer_id) = 0;
50 virtual mojo::ScopedSharedBufferHandle GetHandleForTransit(int buffer_id) = 0;
51 };
52
53 class CAPTURE_EXPORT VideoFrameConsumerFeedbackObserver { 44 class CAPTURE_EXPORT VideoFrameConsumerFeedbackObserver {
54 public: 45 public:
55 virtual ~VideoFrameConsumerFeedbackObserver() {} 46 virtual ~VideoFrameConsumerFeedbackObserver() {}
56 47
57 // During processing of a video frame, consumers may report back their 48 // During processing of a video frame, consumers may report back their
58 // utilization level to the source device. The device may use this information 49 // utilization level to the source device. The device may use this information
59 // to adjust the rate of data it pushes out. Values are interpreted as 50 // to adjust the rate of data it pushes out. Values are interpreted as
60 // follows: 51 // follows:
61 // Less than 0.0 is meaningless and should be ignored. 1.0 indicates a 52 // Less than 0.0 is meaningless and should be ignored. 1.0 indicates a
62 // maximum sustainable utilization. Greater than 1.0 indicates the consumer 53 // maximum sustainable utilization. Greater than 1.0 indicates the consumer
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150 // Captured new video data, held in |frame| or |buffer|, respectively for 141 // Captured new video data, held in |frame| or |buffer|, respectively for
151 // OnIncomingCapturedVideoFrame() and OnIncomingCapturedBuffer(). 142 // OnIncomingCapturedVideoFrame() and OnIncomingCapturedBuffer().
152 // 143 //
153 // In both cases, as the frame is backed by a reservation returned by 144 // In both cases, as the frame is backed by a reservation returned by
154 // ReserveOutputBuffer(), delivery is guaranteed and will require no 145 // ReserveOutputBuffer(), delivery is guaranteed and will require no
155 // additional copies in the browser process. 146 // additional copies in the browser process.
156 // See OnIncomingCapturedData for details of |reference_time| and 147 // See OnIncomingCapturedData for details of |reference_time| and
157 // |timestamp|. 148 // |timestamp|.
158 // TODO(chfremer): Consider removing one of the two in order to simplify the 149 // TODO(chfremer): Consider removing one of the two in order to simplify the
159 // interface. 150 // interface.
160 virtual void OnIncomingCapturedBuffer(std::unique_ptr<Buffer> buffer, 151 virtual void OnIncomingCapturedBuffer(
161 const VideoCaptureFormat& format, 152 std::unique_ptr<Buffer> buffer,
162 base::TimeTicks reference_time, 153 const VideoCaptureFormat& frame_format,
163 base::TimeDelta timestamp) = 0; 154 base::TimeTicks reference_time,
155 base::TimeDelta timestamp) = 0;
164 virtual void OnIncomingCapturedVideoFrame( 156 virtual void OnIncomingCapturedVideoFrame(
165 std::unique_ptr<Buffer> buffer, 157 std::unique_ptr<Buffer> buffer,
166 scoped_refptr<VideoFrame> frame) = 0; 158 scoped_refptr<VideoFrame> frame) = 0;
167 159
168 // Attempts to reserve the same Buffer provided in the last call to one of 160 // Attempts to reserve the same Buffer provided in the last call to one of
169 // the OnIncomingCapturedXXX() methods. This will fail if the content of the 161 // the OnIncomingCapturedXXX() methods. This will fail if the content of the
170 // Buffer has not been preserved, or if the |dimensions|, |format|, or 162 // Buffer has not been preserved, or if the |dimensions|, |format|, or
171 // |storage| disagree with how it was reserved via ReserveOutputBuffer(). 163 // |storage| disagree with how it was reserved via ReserveOutputBuffer().
172 // When this operation fails, nullptr will be returned. 164 // When this operation fails, nullptr will be returned.
173 virtual std::unique_ptr<Buffer> ResurrectLastOutputBuffer( 165 virtual std::unique_ptr<Buffer> ResurrectLastOutputBuffer(
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275 267
276 private: 268 private:
277 // Gets the power line frequency from the current system time zone if this is 269 // Gets the power line frequency from the current system time zone if this is
278 // defined, otherwise returns 0. 270 // defined, otherwise returns 0.
279 PowerLineFrequency GetPowerLineFrequencyForLocation() const; 271 PowerLineFrequency GetPowerLineFrequencyForLocation() const;
280 }; 272 };
281 273
282 } // namespace media 274 } // namespace media
283 275
284 #endif // MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_DEVICE_H_ 276 #endif // MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_DEVICE_H_
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