Revert of Unify the macOS and iOS capturer implementations

webrtc/modules/video_capture/mac/qtkit/video_capture_qtkit_info_objc.mm

Index: webrtc/modules/video_capture/mac/qtkit/video_capture_qtkit_info_objc.mm
diff --git a/webrtc/modules/video_capture/mac/qtkit/video_capture_qtkit_info_objc.mm b/webrtc/modules/video_capture/mac/qtkit/video_capture_qtkit_info_objc.mm
new file mode 100644
index 0000000000000000000000000000000000000000..d3f2188bae6923ef5e8c7c7cbb30a26623cd3bb6
--- /dev/null
+++ b/webrtc/modules/video_capture/mac/qtkit/video_capture_qtkit_info_objc.mm
@@ -0,0 +1,191 @@
+/*
+ *  Copyright (c) 2012 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.
+ */
+
+#pragma mark **** imports/includes
+
+#import "webrtc/modules/video_capture/mac/qtkit/video_capture_qtkit_info_objc.h"
+
+#include "webrtc/system_wrappers/include/trace.h"
+
+using namespace webrtc;
+
+#pragma mark **** hidden class interface
+
+@implementation VideoCaptureMacQTKitInfoObjC
+
+// ****************** over-written OS methods ***********************
+#pragma mark **** over-written OS methods
+
+/// ***** Objective-C. Similar to C++ constructor, although invoked manually
+/// ***** Potentially returns an instance of self
+-(id)init{
+    self = [super init];
+    if(nil != self){
+        [self checkOSSupported];
+        [self initializeVariables];
+    }
+    else
+    {
+        return nil;
+    }
+    return self;
+}
+
+/// ***** Objective-C. Similar to C++ destructor
+/// ***** Returns nothing
+- (void)dealloc {
+
+    [_captureDevicesInfo release];
+
+    [super dealloc];
+}
+
+// ****************** public methods ******************
+#pragma mark **** public method implementations
+
+/// ***** Creates a message box with Cocoa framework
+/// ***** Returns 0 on success, -1 otherwise.
+- (NSNumber*)displayCaptureSettingsDialogBoxWithDevice:(const char*)deviceUniqueIdUTF8
+                    AndTitle:(const char*)dialogTitleUTF8
+                    AndParentWindow:(void*) parentWindow
+                    AtX:(uint32_t)positionX
+                    AndY:(uint32_t) positionY
+{
+    NSString* strTitle = [NSString stringWithFormat:@"%s", dialogTitleUTF8];
+    NSString* strButton = @"Alright";
+    NSAlert* alert = [NSAlert alertWithMessageText:strTitle
+                      defaultButton:strButton
+                      alternateButton:nil otherButton:nil
+                      informativeTextWithFormat:@"Device %s is capturing", deviceUniqueIdUTF8];
+    [alert setAlertStyle:NSInformationalAlertStyle];
+    [alert runModal];
+    return [NSNumber numberWithInt:0];
+}
+
+- (NSNumber*)getCaptureDeviceCount{
+    [self getCaptureDevices];
+    return [NSNumber numberWithInt:_captureDeviceCountInfo];
+}
+
+
+- (NSNumber*)getDeviceNamesFromIndex:(uint32_t)index
+    DefaultName:(char*)deviceName
+    WithLength:(uint32_t)deviceNameLength
+    AndUniqueID:(char*)deviceUniqueID
+    WithLength:(uint32_t)deviceUniqueIDLength
+    AndProductID:(char*)deviceProductID
+    WithLength:(uint32_t)deviceProductIDLength
+{
+    if(NO == _OSSupportedInfo)
+    {
+        return [NSNumber numberWithInt:0];
+    }
+
+    if(index >= (uint32_t)_captureDeviceCountInfo)
+    {
+        return [NSNumber numberWithInt:-1];
+    }
+
+    QTCaptureDevice* tempCaptureDevice =
+        (QTCaptureDevice*)[_captureDevicesInfo objectAtIndex:index];
+    if(!tempCaptureDevice)
+    {
+        return [NSNumber numberWithInt:-1];
+    }
+
+    memset(deviceName, 0, deviceNameLength);
+    memset(deviceUniqueID, 0, deviceUniqueIDLength);
+
+    bool successful = NO;
+
+    NSString* tempString = [tempCaptureDevice localizedDisplayName];
+    successful = [tempString getCString:(char*)deviceName
+                  maxLength:deviceNameLength encoding:NSUTF8StringEncoding];
+    if(NO == successful)
+    {
+        memset(deviceName, 0, deviceNameLength);
+        return [NSNumber numberWithInt:-1];
+    }
+
+    tempString = [tempCaptureDevice uniqueID];
+    successful = [tempString getCString:(char*)deviceUniqueID
+                  maxLength:deviceUniqueIDLength encoding:NSUTF8StringEncoding];
+    if(NO == successful)
+    {
+        memset(deviceUniqueID, 0, deviceNameLength);
+        return [NSNumber numberWithInt:-1];
+    }
+
+    return [NSNumber numberWithInt:0];
+
+}
+
+// ****************** "private" category functions below here  ******************
+#pragma mark **** "private" method implementations
+
+- (NSNumber*)initializeVariables
+{
+    if(NO == _OSSupportedInfo)
+    {
+        return [NSNumber numberWithInt:0];
+    }
+
+    _poolInfo = [[NSAutoreleasePool alloc]init];
+    _captureDeviceCountInfo = 0;
+    [self getCaptureDevices];
+
+    return [NSNumber numberWithInt:0];
+}
+
+// ***** Checks to see if the QTCaptureSession framework is available in the OS
+// ***** If it is not, isOSSupprted = NO
+// ***** Throughout the rest of the class isOSSupprted is checked and functions
+// ***** are/aren't called depending
+// ***** The user can use weak linking to the QTKit framework and run on older
+// ***** versions of the OS
+// ***** I.E. Backwards compaitibility
+// ***** Returns nothing. Sets member variable
+- (void)checkOSSupported
+{
+    Class osSupportedTest = NSClassFromString(@"QTCaptureSession");
+    if(nil == osSupportedTest)
+    {
+      _OSSupportedInfo = NO;
+    }
+    else
+    {
+      _OSSupportedInfo = YES;
+    }
+}
+
+/// ***** Retrieves the number of capture devices currently available
+/// ***** Stores them in an NSArray instance
+/// ***** Returns 0 on success, -1 otherwise.
+- (NSNumber*)getCaptureDevices
+{
+    if(NO == _OSSupportedInfo)
+    {
+        return [NSNumber numberWithInt:0];
+    }
+
+    if(_captureDevicesInfo)
+    {
+        [_captureDevicesInfo release];
+    }
+    _captureDevicesInfo = [[NSArray alloc]
+                            initWithArray:[QTCaptureDevice
+                                           inputDevicesWithMediaType:QTMediaTypeVideo]];
+
+    _captureDeviceCountInfo = _captureDevicesInfo.count;
+
+    return [NSNumber numberWithInt:0];
+}
+
+@end