add videotoolbox decoder for OSX/iOS

cv buffer life time is different with vda. must increase ref in interop
objects
TODO:
most code are the same as vda. unify these 2 decoders

QtAV.pro

@@ -70,7 +70,9 @@ unix {
   !no-vaapi: OptionalDepends *= vaapi
   !no-cedarv: OptionalDepends *= libcedarv
 }
-
+mac|ios {
+  !no-videotoolbox: OptionalDepends *= videotoolbox
+}
 runConfigTests()
 !config_avresample:!config_swresample {
   error("libavresample or libswresample is required. Setup your environment correctly then delete $$BUILD_DIR/.qmake.conf and run qmake again")

config.tests/videotoolbox/main.cpp

@@ -0,0 +1,21 @@
+/******************************************************************************
+    QtAV:  Media play library based on Qt and FFmpeg
+    Copyright (C) 2015 Wang Bin <[email protected]>
+
+*   This file is part of QtAV
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+******************************************************************************/
+#include <libavcodec/videotoolbox.h>

config.tests/videotoolbox/videotoolbox.pro

@@ -0,0 +1,6 @@
+CONFIG -= qt app_bundle
+CONFIG += console
+
+SOURCES += main.cpp
+
+include(../paths.pri)

src/QtAV/VideoDecoderTypes.h

@@ -1,6 +1,6 @@
 /******************************************************************************
     VideoRendererTypes: type id and manually id register function
-    Copyright (C) 2013 Wang Bin <[email protected]>
+    Copyright (C) 2013-2015 Wang Bin <[email protected]>
 
 *   This file is part of QtAV
 
@@ -40,6 +40,7 @@ extern Q_AV_EXPORT VideoDecoderId VideoDecoderId_VAAPI;
 extern Q_AV_EXPORT VideoDecoderId VideoDecoderId_Cedarv;
 extern Q_AV_EXPORT VideoDecoderId VideoDecoderId_FFmpeg_VDPAU;
 extern Q_AV_EXPORT VideoDecoderId VideoDecoderId_VDA;
+extern Q_AV_EXPORT VideoDecoderId VideoDecoderId_VideoToolbox;
 
 
 Q_AV_EXPORT void VideoDecoder_RegisterAll();

src/codec/video/VideoDecoderTypes.cpp

@@ -1,3 +1,24 @@
+/******************************************************************************
+    VideoRendererTypes: type id and manually id register function
+    Copyright (C) 2013-2015 Wang Bin <[email protected]>
+
+*   This file is part of QtAV
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+******************************************************************************/
+
 #include "QtAV/VideoDecoderTypes.h"
 #include "QtAV/FactoryDefine.h"
 #include "QtAV/private/mkid.h"
@@ -10,6 +31,7 @@ VideoDecoderId VideoDecoderId_DXVA = mkid::id32base36_4<'D', 'X', 'V', 'A'>::val
 VideoDecoderId VideoDecoderId_VAAPI = mkid::id32base36_5<'V', 'A', 'A', 'P', 'I'>::value;
 VideoDecoderId VideoDecoderId_Cedarv = mkid::id32base36_6<'C', 'e', 'd', 'a', 'r', 'V'>::value;
 VideoDecoderId VideoDecoderId_VDA = mkid::id32base36_3<'V', 'D', 'A'>::value;
+VideoDecoderId VideoDecoderId_VideoToolbox = mkid::id32base36_5<'V', 'T', 'B', 'o', 'x'>::value;
 
 QVector<VideoDecoderId> GetRegistedVideoDecoderIds()
 {