media/capture/video/mac/video_capture_device_qtkit_mac.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 // VideoCaptureDeviceQTKit implements all QTKit related code for
   6 // communicating with a QTKit capture device.
   7
   8 #ifndef MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_QTKIT_MAC_H_
   9 #define MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_QTKIT_MAC_H_
  10
  11 #import <Foundation/Foundation.h>
  12
  13 #include <vector>
  14
  15 #import "media/capture/video/mac/platform_video_capturing_mac.h"
  16
  17 namespace media {
  18 class VideoCaptureDeviceMac;
  19 }
  20
  21 @class QTCaptureDeviceInput;
  22 @class QTCaptureSession;
  23
  24 @interface VideoCaptureDeviceQTKit : NSObject<PlatformVideoCapturingMac> {
  25  @private
  26   // Settings.
  27   float frameRate_;
  28
  29   NSLock* lock_;
  30   media::VideoCaptureDeviceMac* frameReceiver_;
  31
  32   // QTKit variables.
  33   QTCaptureSession* captureSession_;
  34   QTCaptureDeviceInput* captureDeviceInput_;
  35
  36   // Buffer for adjusting frames which do not fit receiver
  37   // assumptions.  scoped_array<> might make more sense, if the size
  38   // can be proven invariant.
  39   std::vector<UInt8> adjustedFrame_;
  40 }
  41
  42 // Fills up the |deviceNames| dictionary of capture devices with friendly name
  43 // and unique id. No thread assumptions, but this method should run in UI
  44 // thread, see http://crbug.com/139164
  45 + (void)getDeviceNames:(NSMutableDictionary*)deviceNames;
  46
  47 // Returns a dictionary of capture devices with friendly name and unique id, via
  48 // runing +getDeviceNames: on Main Thread.
  49 + (NSDictionary*)deviceNames;
  50
  51 // Initializes the instance and registers the frame receiver.
  52 - (id)initWithFrameReceiver:(media::VideoCaptureDeviceMac*)frameReceiver;
  53
  54 // Set the frame receiver.
  55 - (void)setFrameReceiver:(media::VideoCaptureDeviceMac*)frameReceiver;
  56
  57 // Sets which capture device to use. Returns YES on sucess, NO otherwise.
  58 - (BOOL)setCaptureDevice:(NSString*)deviceId;
  59
  60 // Configures the capture properties.
  61 - (BOOL)setCaptureHeight:(int)height
  62                    width:(int)width
  63                frameRate:(float)frameRate;
  64
  65 // Start video capturing. Returns YES on sucess, NO otherwise.
  66 - (BOOL)startCapture;
  67
  68 // Stops video capturing.
  69 - (void)stopCapture;
  70
  71 // Handle any QTCaptureSessionRuntimeErrorNotifications.
  72 - (void)handleNotification:(NSNotification*)errorNotification;
  73
  74 @end
  75
  76 #endif  // MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_QTKIT_MAC_H_