Split avfoundationcapturer classes in separate files.

webrtc/sdk/objc/Framework/Classes/RTCAVFoundationVideoCapturerInternal.h

 /*
- *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
+ *  Copyright 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#import <WebRTC/RTCMacros.h>
-#import <WebRTC/RTCVideoSource.h>
+#import <AVFoundation/AVFoundation.h>
+#import <Foundation/Foundation.h>
 
-@class AVCaptureSession;
-@class RTCMediaConstraints;
-@class RTCPeerConnectionFactory;
+#include "avfoundationvideocapturer.h"
 
 NS_ASSUME_NONNULL_BEGIN
+// This class used to capture frames using AVFoundation APIs on iOS. It is meant
+// to be owned by an instance of AVFoundationVideoCapturer. The reason for this
+// because other webrtc objects own cricket::VideoCapturer, which is not
+// ref counted. To prevent bad behavior we do not expose this class directly.
+@interface RTCAVFoundationVideoCapturerInternal
+    : NSObject<AVCaptureVideoDataOutputSampleBufferDelegate>
 
-/**
- * RTCAVFoundationVideoSource is a video source that uses
- * webrtc::AVFoundationVideoCapturer. We do not currently provide a wrapper for
- * that capturer because cricket::VideoCapturer is not ref counted and we cannot
- * guarantee its lifetime. Instead, we expose its properties through the ref
- * counted video source interface.
- */
-RTC_EXPORT
-@interface RTCAVFoundationVideoSource : RTCVideoSource
+@property(nonatomic, readonly) AVCaptureSession *captureSession;
+@property(nonatomic, readonly) dispatch_queue_t frameQueue;
+@property(nonatomic, readonly) BOOL canUseBackCamera;
+@property(nonatomic, assign) BOOL useBackCamera;  // Defaults to NO.
+@property(atomic, assign) BOOL isRunning;  // Whether the capture session is running.
+@property(atomic, assign) BOOL hasStarted;  // Whether we have an unmatched start.
 
-- (instancetype)init NS_UNAVAILABLE;
+// We keep a pointer back to AVFoundationVideoCapturer to make callbacks on it
+// when we receive frames. This is safe because this object should be owned by
+// it.
+- (instancetype)initWithCapturer:(webrtc::AVFoundationVideoCapturer *)capturer;
+- (AVCaptureDevice *)getActiveCaptureDevice;
 
-/** Returns whether rear-facing camera is available for use. */
-@property(nonatomic, readonly) BOOL canUseBackCamera;
+- (nullable AVCaptureDevice *)frontCaptureDevice;
+- (nullable AVCaptureDevice *)backCaptureDevice;
 
-/** Switches the camera being used (either front or back). */
-@property(nonatomic, assign) BOOL useBackCamera;
-
-/** Returns the active capture session. */
-@property(nonatomic, readonly) AVCaptureSession *captureSession;
+// Starts and stops the capture session asynchronously. We cannot do this
+// synchronously without blocking a WebRTC thread.
+- (void)start;
+- (void)stop;
 
 @end
-
 NS_ASSUME_NONNULL_END