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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 // VideoCaptureManager is used to open/close, start/stop, enumerate available | 5 // VideoCaptureManager is used to open/close, start/stop, enumerate available |
6 // video capture devices, and manage VideoCaptureController's. | 6 // video capture devices, and manage VideoCaptureController's. |
7 // All functions are expected to be called from Browser::IO thread. Some helper | 7 // All functions are expected to be called from Browser::IO thread. Some helper |
8 // functions (*OnDeviceThread) will dispatch operations to the device thread. | 8 // functions (*OnDeviceThread) will dispatch operations to the device thread. |
9 // VideoCaptureManager will open OS dependent instances of VideoCaptureDevice. | 9 // VideoCaptureManager will open OS dependent instances of VideoCaptureDevice. |
10 // A device can only be opened once. | 10 // A device can only be opened once. |
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254 // To avoid multiple unnecessary start/stop commands to the OS, each start | 254 // To avoid multiple unnecessary start/stop commands to the OS, each start |
255 // request is queued in |device_start_queue_|. | 255 // request is queued in |device_start_queue_|. |
256 // QueueStartDevice creates a new entry in |device_start_queue_| and posts a | 256 // QueueStartDevice creates a new entry in |device_start_queue_| and posts a |
257 // request to start the device on the device thread unless there is | 257 // request to start the device on the device thread unless there is |
258 // another request pending start. | 258 // another request pending start. |
259 void QueueStartDevice(media::VideoCaptureSessionId session_id, | 259 void QueueStartDevice(media::VideoCaptureSessionId session_id, |
260 DeviceEntry* entry, | 260 DeviceEntry* entry, |
261 const media::VideoCaptureParams& params); | 261 const media::VideoCaptureParams& params); |
262 void OnDeviceStarted( | 262 void OnDeviceStarted( |
263 int serial_id, | 263 int serial_id, |
264 std::unique_ptr<media::FrameBufferPool> frame_buffer_pool, | |
265 std::unique_ptr<VideoCaptureDevice> device); | 264 std::unique_ptr<VideoCaptureDevice> device); |
266 void DoStopDevice(DeviceEntry* entry); | 265 void DoStopDevice(DeviceEntry* entry); |
267 void HandleQueuedStartRequest(); | 266 void HandleQueuedStartRequest(); |
268 | 267 |
269 // Creates and Starts a new VideoCaptureDevice. The resulting | 268 // Creates and Starts a new VideoCaptureDevice. The resulting |
270 // VideoCaptureDevice is returned to the IO-thread and stored in | 269 // VideoCaptureDevice is returned to the IO-thread and stored in |
271 // a DeviceEntry in |devices_|. Ownership of |client| passes to | 270 // a DeviceEntry in |devices_|. Ownership of |client| passes to |
272 // the device. | 271 // the device. |
273 std::unique_ptr<VideoCaptureDevice> DoStartDeviceCaptureOnDeviceThread( | 272 std::unique_ptr<VideoCaptureDevice> DoStartDeviceCaptureOnDeviceThread( |
274 const VideoCaptureDeviceDescriptor& descriptor, | 273 const VideoCaptureDeviceDescriptor& descriptor, |
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355 // Map used by DesktopCapture. | 354 // Map used by DesktopCapture. |
356 std::map<media::VideoCaptureSessionId, gfx::NativeViewId> | 355 std::map<media::VideoCaptureSessionId, gfx::NativeViewId> |
357 notification_window_ids_; | 356 notification_window_ids_; |
358 | 357 |
359 DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager); | 358 DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager); |
360 }; | 359 }; |
361 | 360 |
362 } // namespace content | 361 } // namespace content |
363 | 362 |
364 #endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_ | 363 #endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_ |
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