merged encoder and decoder code into one folder since they can share quite a bit of code

app/codec/encoder.h

@@ -0,0 +1,74 @@
+#ifndef ENCODER_H
+#define ENCODER_H
+
+#include <memory>
+#include <QString>
+
+#include "codec/frame.h"
+#include "common/constructors.h"
+#include "render/audioparams.h"
+#include "render/videoparams.h"
+
+class Encoder;
+using EncoderPtr = std::shared_ptr<Encoder>;
+
+class EncodingParams {
+public:
+  EncodingParams();
+
+  void SetFilename(const QString& filename);
+  void EnableVideo(const VideoRenderingParams& video_params, const QString& vcodec);
+  void EnableAudio(const AudioRenderingParams& audio_params, const QString& acodec);
+
+  const QString& filename() const;
+
+  bool video_enabled() const;
+  const QString& video_codec() const;
+  const VideoRenderingParams& video_params() const;
+
+  bool audio_enabled() const;
+  const QString& audio_codec() const;
+  const AudioRenderingParams& audio_params() const;
+
+private:
+  QString filename_;
+
+  bool video_enabled_;
+  QString video_codec_;
+  VideoRenderingParams video_params_;
+
+  bool audio_enabled_;
+  QString audio_codec_;
+  AudioRenderingParams audio_params_;
+};
+
+class Encoder
+{
+public:
+  Encoder(const EncodingParams& params);
+
+  DISABLE_COPY_MOVE(Encoder)
+
+  virtual bool Open() = 0;
+  virtual void Write(FramePtr frame) = 0;
+  virtual void Close() = 0;
+
+  /**
+   * @brief Create a Encoder instance using a Encoder ID
+   *
+   * @return
+   *
+   * A Encoder instance or nullptr if a Decoder with this ID does not exist
+   */
+  static EncoderPtr CreateFromID(const QString& id, const EncodingParams &params);
+
+protected:
+  const EncodingParams& params() const;
+
+  bool open_;
+
+private:
+  EncodingParams params_;
+};
+
+#endif // ENCODER_H