增加扩展屏的框架

demo/windows_sender/VideoEncoder.h

@@ -5,12 +5,14 @@
 #include <vector>
 #include <cstdint>
 
+#ifndef NO_FFMPEG
 extern "C" {
 #include <libavcodec/avcodec.h>
 #include <libavutil/imgutils.h>
 #include <libavutil/opt.h>
 #include <libswscale/swscale.h>
 }
+#endif
 
 using Microsoft::WRL::ComPtr;
 
@@ -20,17 +22,26 @@ public:
     ~VideoEncoder();
 
     bool Initialize(ID3D11Device* device, int width, int height, int fps, int bitrate);
+    bool Reinitialize(int width, int height, int fps, int bitrate);
     bool EncodeFrame(ID3D11Texture2D* texture, std::vector<uint8_t>& outputData, bool& isKeyFrame);
+    void Release();
 
 private:
     ID3D11Device* device_ = nullptr;
     ID3D11DeviceContext* context_ = nullptr;
     ComPtr<ID3D11Texture2D> stagingTexture_;
 
+#ifndef NO_FFMPEG
     AVCodecContext* codecContext_ = nullptr;
     AVFrame* frame_ = nullptr;
     AVPacket* packet_ = nullptr;
     SwsContext* swsContext_ = nullptr;
+#else
+    void* codecContext_ = nullptr;
+    void* frame_ = nullptr;
+    void* packet_ = nullptr;
+    void* swsContext_ = nullptr;
+#endif
 
     int width_ = 0;
     int height_ = 0;