Mac VideoCapture: return empty GetModel() for non-USB non-built-in cameras.

media/video/capture/mac/video_capture_device_mac.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // MacOSX implementation of generic VideoCaptureDevice, using either QTKit or
 // AVFoundation as native capture API. QTKit is available in all OSX versions,
 // although namely deprecated in 10.9, and AVFoundation is available in versions
 // 10.7 (Lion) and later.
 
 #ifndef MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_
 #define MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_
 
+#import <Foundation/Foundation.h>
+
 #include <string>
 
 #include "base/compiler_specific.h"
+#include "base/mac/scoped_nsobject.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "media/video/capture/video_capture_device.h"
 #include "media/video/capture/video_capture_types.h"
 
 @protocol PlatformVideoCapturingMac;
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
+// Small class to bundle device name and connection type into a dictionary.
+MEDIA_EXPORT
+@interface DeviceNameAndTransportType : NSObject {
+ @private
+  base::scoped_nsobject<NSString> deviceName_;
+  // The transport type of the device (USB, PCI, etc), values are defined in
+  // <IOKit/audio/IOAudioTypes.h> as kIOAudioDeviceTransportType*.
+  int32_t transportType_;
+}
+
+- (id)initWithName:(NSString*)name transportType:(int32_t)transportType;
+
+- (NSString*)deviceName;
+- (int32_t)transportType;
+@end
+
 namespace media {
 
+enum {
+  // Unknown transport type, addition to the kIOAudioDeviceTransportType*
+  // family for QTKit devices where this attribute isn't published.
+  kIOAudioDeviceTransportTypeUnknown = 'unkn'
+};
+
 // Called by VideoCaptureManager to open, close and start, stop Mac video
 // capture devices.
 class VideoCaptureDeviceMac : public VideoCaptureDevice {
  public:
   explicit VideoCaptureDeviceMac(const Name& device_name);
   virtual ~VideoCaptureDeviceMac();
 
   // VideoCaptureDevice implementation.
   virtual void AllocateAndStart(
       const VideoCaptureParams& params,
@@ skipping 45 matching lines @@
   // VideoCaptureDeviceMac is destroyed.
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoCaptureDeviceMac> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceMac);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_