Reconnect support for DirectShow video capture devices in parallel to MediaFoundation ones.

media/video/capture/win/video_capture_device_win.cc

 // 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.
 
 #include "media/video/capture/win/video_capture_device_win.h"
 
 #include <algorithm>
 #include <list>
 
 #include "base/strings/string_util.h"
@@ skipping 131 matching lines @@
     CoTaskMemFree(mt);
   }
 }
 
 }  // namespace
 
 namespace media {
 
 // static
 void VideoCaptureDevice::GetDeviceNames(Names* device_names) {
+  Names::iterator it;
+
   if (VideoCaptureDeviceMFWin::PlatformSupported()) {
     VideoCaptureDeviceMFWin::GetDeviceNames(device_names);
-  } else {
-    VideoCaptureDeviceWin::GetDeviceNames(device_names);
+    it = device_names->begin();
+    for (; it != device_names->end(); ++it)
+      it->capture_api_type = Name::MEDIA_FOUNDATION;
   }
+  // Retrieve the devices with DirectShow (DS) interface. They might (partially)
+  // overlap with the MediaFoundation (MF), so the list has to be consolidated.
+  Names temp_names;
+  VideoCaptureDeviceWin::GetDeviceNames(&temp_names);
+  it = device_names->begin();
+
+  // Merge the DS devices into the MF device list, and next remove
+  // the duplicates, giving priority to the MF "versions".
+  device_names->merge(temp_names);
+  device_names->unique();
 }
 
 // static
 VideoCaptureDevice* VideoCaptureDevice::Create(const Name& device_name) {
   VideoCaptureDevice* ret = NULL;
+  Names::iterator it;

[tommi (sloooow) - chröme, 2013/06/26 09:57:27]

you shouldn't need to do any enumeration or searching here since the
|capture_api_type| member variable should tell you which API to use.

[mcasas, 2013/07/02 12:28:11]

Done.

+  Names device_names;
+
+  // We search for the device name in the list of devices that MF Api gives.
   if (VideoCaptureDeviceMFWin::PlatformSupported()) {
-    scoped_ptr<VideoCaptureDeviceMFWin> device(
-        new VideoCaptureDeviceMFWin(device_name));
-    if (device->Init())
-      ret = device.release();
-  } else {
-    scoped_ptr<VideoCaptureDeviceWin> device(
-        new VideoCaptureDeviceWin(device_name));
-    if (device->Init())
-      ret = device.release();
+    VideoCaptureDeviceMFWin::GetDeviceNames(&device_names);
+    it = device_names.begin();
+    for (; it != device_names.end(); ++it)
+      if (*it == device_name) {
+        DLOG(WARNING) << " MediaFoundation Device: " << device_name.device_name;
+        scoped_ptr<VideoCaptureDeviceMFWin> device(
+            new VideoCaptureDeviceMFWin(device_name));
+        if (device->Init())
+          ret = device.release();
+        return ret;
+      }
   }
+  VideoCaptureDeviceWin::GetDeviceNames(&device_names);
+  it = device_names.begin();
+  for (; it != device_names.end(); ++it)
+    if (*it == device_name) {
+      DLOG(WARNING) << " DirectShow Device: " << device_name.device_name;
+      scoped_ptr<VideoCaptureDeviceWin> device(
+          new VideoCaptureDeviceWin(device_name));
+      if (device->Init())
+        ret = device.release();
+      return ret;
+    }
 
+  DLOG(ERROR) << "Couldn't recognize VideoCaptureDevice type!";
   return ret;
 }
 
 // static
 void VideoCaptureDeviceWin::GetDeviceNames(Names* device_names) {
   DCHECK(device_names);
 
   ScopedComPtr<ICreateDevEnum> dev_enum;
   HRESULT hr = dev_enum.CreateInstance(CLSID_SystemDeviceEnum, NULL,
                                        CLSCTX_INPROC);
@@ skipping 384 matching lines @@
         capability.color = VideoCaptureCapability::kI420;
       } else if (media_type->subtype == MEDIASUBTYPE_IYUV) {
         // This is identical to kI420.
         capability.color = VideoCaptureCapability::kI420;
       } else if (media_type->subtype == MEDIASUBTYPE_RGB24) {
         capability.color = VideoCaptureCapability::kRGB24;
       } else if (media_type->subtype == MEDIASUBTYPE_YUY2) {
         capability.color = VideoCaptureCapability::kYUY2;
       } else if (media_type->subtype == MEDIASUBTYPE_MJPG) {
         capability.color = VideoCaptureCapability::kMJPEG;
+      } else if (media_type->subtype == MEDIASUBTYPE_UYVY) {
+        capability.color = VideoCaptureCapability::kUYVY;
+      } else if (media_type->subtype == MEDIASUBTYPE_ARGB32) {
+        capability.color = VideoCaptureCapability::kARGB;
       } else {
         WCHAR guid_str[128];
         StringFromGUID2(media_type->subtype, guid_str, arraysize(guid_str));
         DVLOG(2) << "Device support unknown media type " << guid_str;
         continue;
       }
       capabilities_.Add(capability);
     }
     DeleteMediaType(media_type);
     media_type = NULL;
   }
 
   return !capabilities_.empty();
 }
 
 void VideoCaptureDeviceWin::SetErrorState(const char* reason) {
   DCHECK(CalledOnValidThread());
   DVLOG(1) << reason;
   state_ = kError;
   observer_->OnError();
 }
-
 }  // namespace media