diff --git a/src/config.h b/src/config.h
index e09fad17..615a43cf 100644
--- a/src/config.h
+++ b/src/config.h
@@ -28,6 +28,14 @@
 #include "global.h"
 
 
+typedef struct {
+  double qp_factor;
+  int8_t qp_offset;  /*!< \brief QP offset */
+  int8_t poc_offset; /*!< \brief POC offset */
+  int8_t layer;      /*!< \brief Current layer */
+  int8_t is_ref;     /*!< \brief Flag if this picture is used as a reference */
+} gop_config;
+
 /*!
     \brief Struct which contains all configuration data
 */
@@ -88,6 +96,9 @@ typedef struct
     int32_t min;
     int32_t max;
   } pu_depth_inter, pu_depth_intra;
+
+  int8_t gop_len;            /*!< \brief length of GOP for the video sequence */
+  gop_config gop[MAX_GOP];  /*!< \brief Array of GOP settings */
 } config;
 
 /* Function definitions */
diff --git a/src/encoderstate.h b/src/encoderstate.h
index 11273ceb..d14befc3 100644
--- a/src/encoderstate.h
+++ b/src/encoderstate.h
@@ -66,6 +66,7 @@ typedef struct {
   int32_t poc; /*!< \brief picture order count */
   
   int8_t QP;   //!< \brief Quantization parameter
+  double QP_factor; //!< \brief Quantization factor
   
   //Current picture available references
   image_list *ref;
diff --git a/src/global.h b/src/global.h
index 0ff5a1f0..f20bc525 100644
--- a/src/global.h
+++ b/src/global.h
@@ -66,6 +66,9 @@ typedef int16_t coefficient;
 #define PU_DEPTH_INTRA_MIN 0
 #define PU_DEPTH_INTRA_MAX 4
 
+// Maximum length of GoP (for allocating structures)
+#define MAX_GOP 32
+
 // Maximum CU depth when descending form LCU level.
 #define MAX_DEPTH 3  /*!< spec: log2_diff_max_min_luma_coding_block_size */
 // Minimum log2 size of CUs.