Remove unused variables from AV1_COMP

This CL removes the elements in AV1_COMP
structure which are unused.

BUG=aomedia:2610

Change-Id: Ia43acaee77bd4cb7d964561be9c0163f12fae780

av1/encoder/encode_strategy.c

diff --git a/av1/encoder/encode_strategy.c b/av1/encoder/encode_strategy.c
index 900c9ae..d00dafc 100644
--- a/av1/encoder/encode_strategy.c
+++ b/av1/encoder/encode_strategy.c
@@ -394,7 +394,6 @@
 
   if (source != NULL) {
     cm->showable_frame = 1;
-    cpi->alt_ref_source = source;
 
     // When arf_src_index == rc->frames_to_key, it indicates a fwd_kf
     if (arf_src_index == rc->frames_to_key) {
@@ -481,9 +480,6 @@
     source = av1_lookahead_pop(cpi->lookahead, *flush, cpi->compressor_stage);
     if (source == NULL) return NULL;
     frame_params->show_frame = 1;
-
-    // Check to see if the frame should be encoded as an arf overlay.
-    if (cpi->alt_ref_source == source) cpi->alt_ref_source = NULL;
   }
   return source;
 }

av1/encoder/encoder.c

diff --git a/av1/encoder/encoder.c b/av1/encoder/encoder.c
index 84e6372..0e25acc 100644
--- a/av1/encoder/encoder.c
+++ b/av1/encoder/encoder.c
@@ -2924,7 +2924,6 @@
   }
   update_frame_size(cpi);
 
-  cpi->alt_ref_source = NULL;
   rc->is_src_frame_alt_ref = 0;
 
   set_tile_info(cpi);
@@ -3028,10 +3027,6 @@
   memset(cm->fc, 0, sizeof(*cm->fc));
   memset(cm->default_frame_context, 0, sizeof(*cm->default_frame_context));
 
-  cpi->resize_state = 0;
-  cpi->resize_avg_qp = 0;
-  cpi->resize_buffer_underflow = 0;
-
   cpi->common.buffer_pool = pool;
 
   cpi->lap_enabled = num_lap_buffers > 0;

av1/encoder/encoder.h

diff --git a/av1/encoder/encoder.h b/av1/encoder/encoder.h
index 31cdcae..628ca9a 100644
--- a/av1/encoder/encoder.h
+++ b/av1/encoder/encoder.h
@@ -838,7 +838,6 @@
   AV1_COMMON common;
   AV1EncoderConfig oxcf;
   struct lookahead_ctx *lookahead;
-  struct lookahead_entry *alt_ref_source;
   int no_show_kf;
 
   TRELLIS_OPT_TYPE optimize_seg_arr[MAX_SEGMENTS];
@@ -863,7 +862,6 @@
   double cs_rate_array[32];
   int rate_size;
   int rate_index;
-  int previous_index;
 
   unsigned int row_mt;
   RefCntBuffer *scaled_ref_buf[INTER_REFS_PER_FRAME];
@@ -1033,10 +1031,6 @@
   TOKENEXTRA *tile_tok[MAX_TILE_ROWS][MAX_TILE_COLS];
   TOKENLIST *tplist[MAX_TILE_ROWS][MAX_TILE_COLS];
 
-  int resize_state;
-  int resize_avg_qp;
-  int resize_buffer_underflow;
-
   // Sequence parameters have been transmitted already and locked
   // or not. Once locked av1_change_config cannot change the seq
   // parameters.
@@ -1068,7 +1062,6 @@
   AVxWorker *workers;
   struct EncWorkerData *tile_thr_data;
   int existing_fb_idx_to_show;
-  int is_arf_filter_off[MAX_INTERNAL_ARFS + 1];
   int global_motion_search_done;
   int internal_altref_allowed;
   // A flag to indicate if intrabc is ever used in current frame.
@@ -1134,7 +1127,6 @@
   // Filter mask to allow certain interp_filter type.
   uint16_t interp_filter_search_mask;
 
-  int preserve_arf_as_gld;
   MultiThreadHandle multi_thread_ctxt;
   void (*row_mt_sync_read_ptr)(AV1RowMTSync *const, int, int);
   void (*row_mt_sync_write_ptr)(AV1RowMTSync *const, int, int, const int);