Document variables for IBP

av1/common/av1_common_int.h

diff --git a/av1/common/av1_common_int.h b/av1/common/av1_common_int.h
index fedaf0f..8d6560d 100644
--- a/av1/common/av1_common_int.h
+++ b/av1/common/av1_common_int.h
@@ -1160,6 +1160,9 @@
   int spatial_layer_id;
 
 #if CONFIG_IBP_DIR
+  /*!
+   * Weights for IBP of directional modes.
+   */
   uint8_t *ibp_directional_weights[TX_SIZES_ALL][DIR_MODES_0_90];
 #endif
 

av1/encoder/encoder.h

diff --git a/av1/encoder/encoder.h b/av1/encoder/encoder.h
index 6249874..f47fdcc 100644
--- a/av1/encoder/encoder.h
+++ b/av1/encoder/encoder.h
@@ -280,6 +280,9 @@
   bool enable_orip;
 #endif
 #if CONFIG_IBP_DC || CONFIG_IBP_DIR
+  /*!
+   * Flag to indicate if IBP should be enabled
+   */
   bool enable_ibp;
 #endif
 } IntraModeCfg;