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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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252 // To avoid multiple unnecessary start/stop commands to the OS, each start | 252 // To avoid multiple unnecessary start/stop commands to the OS, each start |
253 // request is queued in |device_start_queue_|. | 253 // request is queued in |device_start_queue_|. |
254 // QueueStartDevice creates a new entry in |device_start_queue_| and posts a | 254 // QueueStartDevice creates a new entry in |device_start_queue_| and posts a |
255 // request to start the device on the device thread unless there is | 255 // request to start the device on the device thread unless there is |
256 // another request pending start. | 256 // another request pending start. |
257 void QueueStartDevice(media::VideoCaptureSessionId session_id, | 257 void QueueStartDevice(media::VideoCaptureSessionId session_id, |
258 DeviceEntry* entry, | 258 DeviceEntry* entry, |
259 const media::VideoCaptureParams& params); | 259 const media::VideoCaptureParams& params); |
260 void OnDeviceStarted( | 260 void OnDeviceStarted( |
261 int serial_id, | 261 int serial_id, |
262 std::unique_ptr<media::FrameBufferPool> frame_buffer_pool, | |
263 std::unique_ptr<VideoCaptureDevice> device); | 262 std::unique_ptr<VideoCaptureDevice> device); |
264 void DoStopDevice(DeviceEntry* entry); | 263 void DoStopDevice(DeviceEntry* entry); |
265 void HandleQueuedStartRequest(); | 264 void HandleQueuedStartRequest(); |
266 | 265 |
267 // Creates and Starts a new VideoCaptureDevice. The resulting | 266 // Creates and Starts a new VideoCaptureDevice. The resulting |
268 // VideoCaptureDevice is returned to the IO-thread and stored in | 267 // VideoCaptureDevice is returned to the IO-thread and stored in |
269 // a DeviceEntry in |devices_|. Ownership of |client| passes to | 268 // a DeviceEntry in |devices_|. Ownership of |client| passes to |
270 // the device. | 269 // the device. |
271 std::unique_ptr<VideoCaptureDevice> DoStartDeviceCaptureOnDeviceThread( | 270 std::unique_ptr<VideoCaptureDevice> DoStartDeviceCaptureOnDeviceThread( |
272 const VideoCaptureDeviceDescriptor& descriptor, | 271 const VideoCaptureDeviceDescriptor& descriptor, |
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353 // Map used by DesktopCapture. | 352 // Map used by DesktopCapture. |
354 std::map<media::VideoCaptureSessionId, gfx::NativeViewId> | 353 std::map<media::VideoCaptureSessionId, gfx::NativeViewId> |
355 notification_window_ids_; | 354 notification_window_ids_; |
356 | 355 |
357 DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager); | 356 DISALLOW_COPY_AND_ASSIGN(VideoCaptureManager); |
358 }; | 357 }; |
359 | 358 |
360 } // namespace content | 359 } // namespace content |
361 | 360 |
362 #endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_ | 361 #endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_MANAGER_H_ |
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