Remove key_frame_frequency variable from VP9_COMP

This member of VP9_COMP seemed unnecessary since it
only shadowed VP9EncoderConfig.key_freq that is
accessible through VP9_COMP.

Change-Id: Ib751bb1cf1b0b3c50a2a527d7c34f6829dd6fee3

vp9/encoder/vp9_encoder.c

@@ -829,7 +829,6 @@ VP9_COMP *vp9_create_compressor(VP9EncoderConfig *oxcf) {
                                sizeof(*cpi->mbgraph_stats[i].mb_stats), 1));
   }
 
-  cpi->key_frame_frequency = cpi->oxcf.key_freq;
   cpi->refresh_alt_ref_frame = 0;
 
 #if CONFIG_MULTIPLE_ARF

vp9/encoder/vp9_encoder.h

@@ -337,8 +337,6 @@ typedef struct VP9_COMP {
   YV12_BUFFER_CONFIG *unscaled_last_source;
   YV12_BUFFER_CONFIG scaled_last_source;
 
-  int key_frame_frequency;
-
   int gold_is_last;  // gold same as last frame ( short circuit gold searches)
   int alt_is_last;  // Alt same as last ( short circuit altref search)
   int gold_is_alt;  // don't do both alt and gold search ( just do gold).

vp9/encoder/vp9_firstpass.c

@@ -1936,7 +1936,7 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
   // Find the next keyframe.
   i = 0;
   while (twopass->stats_in < twopass->stats_in_end &&
-         rc->frames_to_key < cpi->key_frame_frequency) {
+         rc->frames_to_key < cpi->oxcf.key_freq) {
     // Accumulate kf group error.
     kf_group_err += calculate_modified_err(cpi, this_frame);
 
@@ -1966,7 +1966,7 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
 
       // Special check for transition or high motion followed by a
       // static scene.
-      if (detect_transition_to_still(twopass, i, cpi->key_frame_frequency - i,
+      if (detect_transition_to_still(twopass, i, cpi->oxcf.key_freq - i,
                                      loop_decay_rate, decay_accumulator))
         break;
 
@@ -1974,8 +1974,8 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
       ++rc->frames_to_key;
 
       // If we don't have a real key frame within the next two
-      // key_frame_frequency intervals then break out of the loop.
+      // key_freq intervals then break out of the loop.
-      if (rc->frames_to_key >= 2 * (int)cpi->key_frame_frequency)
+      if (rc->frames_to_key >= 2 * cpi->oxcf.key_freq)
         break;
     } else {
       ++rc->frames_to_key;
@@ -1988,7 +1988,7 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
   // This code centers the extra kf if the actual natural interval
   // is between 1x and 2x.
   if (cpi->oxcf.auto_key &&
-      rc->frames_to_key > (int)cpi->key_frame_frequency) {
+      rc->frames_to_key > cpi->oxcf.key_freq) {
     FIRSTPASS_STATS tmp_frame = first_frame;
 
     rc->frames_to_key /= 2;
@@ -2005,7 +2005,7 @@ static void find_next_key_frame(VP9_COMP *cpi, FIRSTPASS_STATS *this_frame) {
     }
     rc->next_key_frame_forced = 1;
   } else if (twopass->stats_in == twopass->stats_in_end ||
-             rc->frames_to_key >= cpi->key_frame_frequency) {
+             rc->frames_to_key >= cpi->oxcf.key_freq) {
     rc->next_key_frame_forced = 1;
   } else {
     rc->next_key_frame_forced = 0;

vp9/encoder/vp9_ratectrl.c

@@ -1215,7 +1215,7 @@ void vp9_rc_get_one_pass_vbr_params(VP9_COMP *cpi) {
     cm->frame_type = KEY_FRAME;
     rc->this_key_frame_forced = cm->current_video_frame != 0 &&
                                 rc->frames_to_key == 0;
-    rc->frames_to_key = cpi->key_frame_frequency;
+    rc->frames_to_key = cpi->oxcf.key_freq;
     rc->kf_boost = DEFAULT_KF_BOOST;
     rc->source_alt_ref_active = 0;
   } else {
@@ -1302,7 +1302,7 @@ void vp9_rc_get_svc_params(VP9_COMP *cpi) {
   if ((cm->current_video_frame == 0) ||
       (cpi->frame_flags & FRAMEFLAGS_KEY) ||
       (cpi->oxcf.auto_key && (rc->frames_since_key %
-                              cpi->key_frame_frequency == 0))) {
+          cpi->oxcf.key_freq == 0))) {
     cm->frame_type = KEY_FRAME;
     rc->source_alt_ref_active = 0;
     if (cpi->pass == 0 && cpi->oxcf.rc_mode == RC_MODE_CBR) {
@@ -1330,7 +1330,7 @@ void vp9_rc_get_one_pass_cbr_params(VP9_COMP *cpi) {
     cm->frame_type = KEY_FRAME;
     rc->this_key_frame_forced = cm->current_video_frame != 0 &&
                                 rc->frames_to_key == 0;
-    rc->frames_to_key = cpi->key_frame_frequency;
+    rc->frames_to_key = cpi->oxcf.key_freq;
     rc->kf_boost = DEFAULT_KF_BOOST;
     rc->source_alt_ref_active = 0;
     target = calc_iframe_target_size_one_pass_cbr(cpi);
@@ -1415,7 +1415,7 @@ void vp9_rc_update_framerate(VP9_COMP *cpi) {
   rc->max_gf_interval = 16;
 
   // Extended interval for genuinely static scenes
-  rc->static_scene_max_gf_interval = cpi->key_frame_frequency >> 1;
+  rc->static_scene_max_gf_interval = cpi->oxcf.key_freq >> 1;
 
   // Special conditions when alt ref frame enabled in lagged compress mode
   if (oxcf->play_alternate && oxcf->lag_in_frames) {

vp9/encoder/vp9_svc_layercontext.c

@@ -153,7 +153,7 @@ void vp9_update_spatial_layer_framerate(VP9_COMP *const cpi, double framerate) {
                                    oxcf->two_pass_vbrmax_section) / 100);
   lrc->max_gf_interval = 16;
 
-  lrc->static_scene_max_gf_interval = cpi->key_frame_frequency >> 1;
+  lrc->static_scene_max_gf_interval = cpi->oxcf.key_freq >> 1;
 
   if (oxcf->play_alternate && oxcf->lag_in_frames) {
     if (lrc->max_gf_interval > oxcf->lag_in_frames - 1)