codec,vic: Disable warnings in ffmpeg headers

src/video_core/command_classes/codecs/codec.h

@@ -14,10 +14,18 @@ extern "C" {
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wconversion"
 #endif
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable : 4242) // conversion from 'type' to 'type', possible loss of data
+#pragma warning(disable : 4244) // conversion from 'type' to 'type', possible loss of data
+#endif
 #include <libavcodec/avcodec.h>
 #if defined(__GNUC__) || defined(__clang__)
 #pragma GCC diagnostic pop
 #endif
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
 }
 
 namespace Tegra {

src/video_core/command_classes/vic.cpp

@@ -3,7 +3,28 @@
 // Refer to the license.txt file included.
 
 #include <array>
+
+extern "C" {
+#if defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
+#endif
+#ifdef _MSC_VER
+#pragma warning(disable : 4244) // conversion from 'type' to 'type', possible loss of data
+#pragma warning(push)
+#endif
+#include <libswscale/swscale.h>
+#if defined(__GNUC__) || defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+}
+
 #include "common/assert.h"
+#include "common/logging/log.h"
+
 #include "video_core/command_classes/nvdec.h"
 #include "video_core/command_classes/vic.h"
 #include "video_core/engines/maxwell_3d.h"
@@ -11,10 +32,6 @@
 #include "video_core/memory_manager.h"
 #include "video_core/textures/decoders.h"
 
-extern "C" {
-#include <libswscale/swscale.h>
-}
-
 namespace Tegra {
 
 Vic::Vic(GPU& gpu_, std::shared_ptr<Nvdec> nvdec_processor_)