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

Issue 1685713003: Remove V4L2CaptureDelegate{Single,Multi}Plane, VCD::Client::OnIncomingCapturedYuvData() (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: perkj@ comments and reverted change to WeakPtr Created 4 years, 10 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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48 // VideoCaptureDevice::Create. 48 // VideoCaptureDevice::Create.
49 class MEDIA_EXPORT Name { 49 class MEDIA_EXPORT Name {
50 public: 50 public:
51 Name(); 51 Name();
52 Name(const std::string& name, const std::string& id); 52 Name(const std::string& name, const std::string& id);
53 53
54 #if defined(OS_LINUX) 54 #if defined(OS_LINUX)
55 // Linux/CrOS targets Capture Api type: it can only be set on construction. 55 // Linux/CrOS targets Capture Api type: it can only be set on construction.
56 enum CaptureApiType { 56 enum CaptureApiType {
57 V4L2_SINGLE_PLANE, 57 V4L2_SINGLE_PLANE,
58 V4L2_MULTI_PLANE,
59 API_TYPE_UNKNOWN 58 API_TYPE_UNKNOWN
60 }; 59 };
61 #elif defined(OS_WIN) 60 #elif defined(OS_WIN)
62 // Windows targets Capture Api type: it can only be set on construction. 61 // Windows targets Capture Api type: it can only be set on construction.
63 enum CaptureApiType { MEDIA_FOUNDATION, DIRECT_SHOW, API_TYPE_UNKNOWN }; 62 enum CaptureApiType { MEDIA_FOUNDATION, DIRECT_SHOW, API_TYPE_UNKNOWN };
64 #elif defined(OS_MACOSX) 63 #elif defined(OS_MACOSX)
65 // Mac targets Capture Api type: it can only be set on construction. 64 // Mac targets Capture Api type: it can only be set on construction.
66 enum CaptureApiType { AVFOUNDATION, QTKIT, DECKLINK, API_TYPE_UNKNOWN }; 65 enum CaptureApiType { AVFOUNDATION, QTKIT, DECKLINK, API_TYPE_UNKNOWN };
67 // For AVFoundation Api, identify devices that are built-in or USB. 66 // For AVFoundation Api, identify devices that are built-in or USB.
68 enum TransportType { USB_OR_BUILT_IN, OTHER_TRANSPORT }; 67 enum TransportType { USB_OR_BUILT_IN, OTHER_TRANSPORT };
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206 // The format of the frame is described by |frame_format|, and is assumed to 205 // The format of the frame is described by |frame_format|, and is assumed to
207 // be tightly packed. This method will try to reserve an output buffer and 206 // be tightly packed. This method will try to reserve an output buffer and
208 // copy from |data| into the output buffer. If no output buffer is 207 // copy from |data| into the output buffer. If no output buffer is
209 // available, the frame will be silently dropped. 208 // available, the frame will be silently dropped.
210 virtual void OnIncomingCapturedData(const uint8_t* data, 209 virtual void OnIncomingCapturedData(const uint8_t* data,
211 int length, 210 int length,
212 const VideoCaptureFormat& frame_format, 211 const VideoCaptureFormat& frame_format,
213 int clockwise_rotation, 212 int clockwise_rotation,
214 const base::TimeTicks& timestamp) = 0; 213 const base::TimeTicks& timestamp) = 0;
215 214
216 // Captured a 3 planar YUV frame. Planes are possibly disjoint.
217 // |frame_format| must indicate I420.
218 virtual void OnIncomingCapturedYuvData(
219 const uint8_t* y_data,
220 const uint8_t* u_data,
221 const uint8_t* v_data,
222 size_t y_stride,
223 size_t u_stride,
224 size_t v_stride,
225 const VideoCaptureFormat& frame_format,
226 int clockwise_rotation,
227 const base::TimeTicks& timestamp) = 0;
228
229 // Reserve an output buffer into which contents can be captured directly. 215 // Reserve an output buffer into which contents can be captured directly.
230 // The returned Buffer will always be allocated with a memory size suitable 216 // The returned Buffer will always be allocated with a memory size suitable
231 // for holding a packed video frame with pixels of |format| format, of 217 // for holding a packed video frame with pixels of |format| format, of
232 // |dimensions| frame dimensions. It is permissible for |dimensions| to be 218 // |dimensions| frame dimensions. It is permissible for |dimensions| to be
233 // zero; in which case the returned Buffer does not guarantee memory 219 // zero; in which case the returned Buffer does not guarantee memory
234 // backing, but functions as a reservation for external input for the 220 // backing, but functions as a reservation for external input for the
235 // purposes of buffer throttling. 221 // purposes of buffer throttling.
236 // 222 //
237 // The output buffer stays reserved and mapped for use until the Buffer 223 // The output buffer stays reserved and mapped for use until the Buffer
238 // object is destroyed or returned. 224 // object is destroyed or returned.
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297 283
298 private: 284 private:
299 // Gets the power line frequency from the current system time zone if this is 285 // Gets the power line frequency from the current system time zone if this is
300 // defined, otherwise returns 0. 286 // defined, otherwise returns 0.
301 PowerLineFrequency GetPowerLineFrequencyForLocation() const; 287 PowerLineFrequency GetPowerLineFrequencyForLocation() const;
302 }; 288 };
303 289
304 } // namespace media 290 } // namespace media
305 291
306 #endif // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_ 292 #endif // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_
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