Mac AVFoundation: use QTKit for cameras not working with AVF (Blackmagic).

media/video/capture/video_capture_device.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.
 //
 // VideoCaptureDevice is the abstract base class for realizing video capture
 // device support in Chromium. It provides the interface for OS dependent
 // implementations.
 // The class is created and functions are invoked on a thread owned by
 // VideoCaptureManager. Capturing is done on other threads, depending on the OS
 // specific implementation.
@@ skipping 30 matching lines @@
     Name(const std::string& name, const std::string& id)
         : device_name_(name), unique_id_(id) {}
 
 #if defined(OS_WIN)
     // Windows targets Capture Api type: it can only be set on construction.
     enum CaptureApiType {
       MEDIA_FOUNDATION,
       DIRECT_SHOW,
       API_TYPE_UNKNOWN
     };
-
+#endif
+#if defined(OS_MACOSX)
+    // Mac targets Capture Api type: it can only be set on construction.
+    enum CaptureApiType {
+      AVFOUNDATION,
+      QTKIT,
+      API_TYPE_UNKNOWN
+    };
+#endif
+#if defined(OS_WIN) || defined(OS_MACOSX)
     Name(const std::string& name,
          const std::string& id,
          const CaptureApiType api_type)
         : device_name_(name), unique_id_(id), capture_api_class_(api_type) {}
-#endif  // if defined(OS_WIN)
+#endif
     ~Name() {}
 
     // Friendly name of a device
     const std::string& name() const { return device_name_; }
 
     // Unique name of a device. Even if there are multiple devices with the same
     // friendly name connected to the computer this will be unique.
     const std::string& id() const { return unique_id_; }
 
-    // The unique hardware model identifier of the capture device.  Returns
+    // The unique hardware model identifier of the capture device. Returns
     // "[vid]:[pid]" when a USB device is detected, otherwise "".
     // The implementation of this method is platform-dependent.
     const std::string GetModel() const;
 
     // Friendly name of a device, plus the model identifier in parentheses.
     const std::string GetNameAndModel() const;
 
     // These operators are needed due to storing the name in an STL container.
     // In the shared build, all methods from the STL container will be exported
     // so even though they're not used, they're still depended upon.
     bool operator==(const Name& other) const {
       return other.id() == unique_id_;
     }
     bool operator<(const Name& other) const {
       return unique_id_ < other.id();
     }
 
-#if defined(OS_WIN)
+#if defined(OS_WIN) || defined(OS_MACOSX)
     CaptureApiType capture_api_type() const {
       return capture_api_class_.capture_api_type();
     }
 #endif  // if defined(OS_WIN)
 
    private:
     std::string device_name_;
     std::string unique_id_;
-#if defined(OS_WIN)
-    // This class wraps the CaptureApiType, so it has a by default value if not
-    // inititalized, and I (mcasas) do a DCHECK on reading its value.
+#if defined(OS_WIN) || defined(OS_MACOSX)
+    // This class wraps the CaptureApiType to give it a by default value if not
+    // initialized.
     class CaptureApiClass {
      public:
-      CaptureApiClass():  capture_api_type_(API_TYPE_UNKNOWN) {}
+      CaptureApiClass(): capture_api_type_(API_TYPE_UNKNOWN) {}
       CaptureApiClass(const CaptureApiType api_type)
-          :  capture_api_type_(api_type) {}
+          : capture_api_type_(api_type) {}
       CaptureApiType capture_api_type() const {
-        DCHECK_NE(capture_api_type_,  API_TYPE_UNKNOWN);
+        DCHECK_NE(capture_api_type_, API_TYPE_UNKNOWN);
         return capture_api_type_;
       }
      private:
       CaptureApiType capture_api_type_;
     };
 
     CaptureApiClass capture_api_class_;
-#endif  // if defined(OS_WIN)
+#endif
     // Allow generated copy constructor and assignment.
   };
 
   // Manages a list of Name entries.
   typedef std::list<Name> Names;
 
   class MEDIA_EXPORT Client {
    public:
     // Memory buffer returned by Client::ReserveOutputBuffer().
     class Buffer : public base::RefCountedThreadSafe<Buffer> {
@@ skipping 97 matching lines @@
   int GetPowerLineFrequencyForLocation() const;
 
  protected:
   static const int kPowerLine50Hz = 50;
   static const int kPowerLine60Hz = 60;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_H_