修复msvc下无法正确获取拓展名的问题, 修复视频文件结束后任然解码的问题, 添加CMake Window下编译

include/decoder.h

@@ -1,25 +1,18 @@
 #ifndef DECODER_H
 #define DECODER_H
-extern "C"{
-    #include "libavcodec/avcodec.h"
-    #include "libavformat/avformat.h"
-    #include "libavutil/imgutils.h"
+extern "C" {
+#include "libavcodec/avcodec.h"
+#include "libavformat/avformat.h"
+#include "libavutil/imgutils.h"
 }
 
-struct DecoderParam{
-    AVFormatContext* fmtCtx;
-    AVCodecContext* codecCtx;
-    int width;
-    int height;
-    int videoStreamIndex;
+struct DecoderParam {
+	AVFormatContext* fmtCtx;
+	AVCodecContext* codecCtx;
+	int width;
+	int height;
+	int videoStreamIndex;
 };
-
-extern "C"{
-    #include "libavcodec/avcodec.h"
-    #include "libavformat/avformat.h"
-    #include "libavutil/imgutils.h"
-}
-
 void InitDecoder(const char* filepath, DecoderParam& param);
 AVFrame* RequestFrame(DecoderParam& param);
 #endif