cosmetics: Correct grammar/spelling in comments

Change-Id: I1954f9d6e33abff9081fe7a5cf59d5497768e0df

4 files changed, 9 insertions, 11 deletions

diff --git a/vp9/encoder/vp9_encodeframe.c b/vp9/encoder/vp9_encodeframe.c
index 69628669d..063c64113 100644
--- a/vp9/encoder/vp9_encodeframe.c
+++ b/vp9/encoder/vp9_encodeframe.c
@@ -54,7 +54,7 @@ static void encode_superblock(VP9_COMP *cpi, ThreadData * td,
                               PICK_MODE_CONTEXT *ctx);
 
 // This is used as a reference when computing the source variance for the
-//  purposes of activity masking.
+//  purpose of activity masking.
 // Eventually this should be replaced by custom no-reference routines,
 //  which will be faster.
 static const uint8_t VP9_VAR_OFFS[64] = {
@@ -4301,9 +4301,9 @@ void vp9_encode_frame(VP9_COMP *cpi) {
     // either compound, single or hybrid prediction as per whatever has
     // worked best for that type of frame in the past.
     // It also predicts whether another coding mode would have worked
-    // better that this coding mode. If that is the case, it remembers
+    // better than this coding mode. If that is the case, it remembers
     // that for subsequent frames.
-    // It does the same analysis for transform size selection also.
+    // It also does the same analysis for transform size selection.
     const MV_REFERENCE_FRAME frame_type = get_frame_type(cpi);
     int64_t *const mode_thrs = rd_opt->prediction_type_threshes[frame_type];
     int64_t *const filter_thrs = rd_opt->filter_threshes[frame_type];
@@ -4391,12 +4391,13 @@ void vp9_encode_frame(VP9_COMP *cpi) {
     encode_frame_internal(cpi);
   }
 
-  // If segmentated AQ is enabled compute the average AQ weighting.
+  // If segmented AQ is enabled compute the average AQ weighting.
   if (cm->seg.enabled && (cpi->oxcf.aq_mode != NO_AQ) &&
       (cm->seg.update_map || cm->seg.update_data)) {
     cm->seg.aq_av_offset = compute_frame_aq_offset(cpi);
   }
 }
+
 static void sum_intra_stats(FRAME_COUNTS *counts, const MODE_INFO *mi) {
   const PREDICTION_MODE y_mode = mi->mode;
   const PREDICTION_MODE uv_mode = mi->uv_mode;
diff --git a/vp9/encoder/vp9_encoder.c b/vp9/encoder/vp9_encoder.c
index 82fea14df..f61771ad1 100644
--- a/vp9/encoder/vp9_encoder.c
+++ b/vp9/encoder/vp9_encoder.c
@@ -420,7 +420,6 @@ static void dealloc_compressor_data(VP9_COMP *cpi) {
   vpx_free(cpi->tile_data);
   cpi->tile_data = NULL;
 
-  // Delete sementation map
   vpx_free(cpi->segmentation_map);
   cpi->segmentation_map = NULL;
   vpx_free(cpi->coding_context.last_frame_seg_map_copy);
@@ -3393,11 +3392,10 @@ static void encode_without_recode_loop(VP9_COMP *cpi,
   }
   apply_active_map(cpi);
 
-  // transform / motion compensation build reconstruction frame
   vp9_encode_frame(cpi);
 
   // Check if we should drop this frame because of high overshoot.
-  // Only for frames where high temporal-source sad is detected.
+  // Only for frames where high temporal-source SAD is detected.
   if (cpi->oxcf.pass == 0 &&
       cpi->oxcf.rc_mode == VPX_CBR &&
       cpi->resize_state == 0 &&
@@ -3539,7 +3537,6 @@ static void encode_with_recode_loop(VP9_COMP *cpi,
       vp9_setup_in_frame_q_adj(cpi);
     }
 
-    // transform / motion compensation build reconstruction frame
     vp9_encode_frame(cpi);
 
     // Update the skip mb flag probabilities based on the distribution
diff --git a/vp9/encoder/vp9_firstpass.c b/vp9/encoder/vp9_firstpass.c
index 66ccc92c4..2be9b5d4d 100644
--- a/vp9/encoder/vp9_firstpass.c
+++ b/vp9/encoder/vp9_firstpass.c
@@ -931,7 +931,7 @@ void vp9_first_pass(VP9_COMP *cpi, const struct lookahead_entry *source) {
 
 #if CONFIG_FP_MB_STATS
         if (cpi->use_fp_mb_stats) {
-          // intra predication statistics
+          // intra prediction statistics
           cpi->twopass.frame_mb_stats_buf[mb_index] = 0;
           cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_DCINTRA_MASK;
           cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_MOTION_ZERO_MASK;
@@ -982,7 +982,7 @@ void vp9_first_pass(VP9_COMP *cpi, const struct lookahead_entry *source) {
 
 #if CONFIG_FP_MB_STATS
           if (cpi->use_fp_mb_stats) {
-            // inter predication statistics
+            // inter prediction statistics
             cpi->twopass.frame_mb_stats_buf[mb_index] = 0;
             cpi->twopass.frame_mb_stats_buf[mb_index] &= ~FPMB_DCINTRA_MASK;
             cpi->twopass.frame_mb_stats_buf[mb_index] |= FPMB_MOTION_ZERO_MASK;
diff --git a/vp9/encoder/vp9_temporal_filter.c b/vp9/encoder/vp9_temporal_filter.c
index b6323e048..41dd084d1 100644
--- a/vp9/encoder/vp9_temporal_filter.c
+++ b/vp9/encoder/vp9_temporal_filter.c
@@ -401,7 +401,7 @@ static void temporal_filter_iterate_c(VP9_COMP *cpi,
               frames[frame]->y_buffer + mb_y_offset,
               frames[frame]->y_stride);
 
-          // Assign higher weight to matching MB if it's error
+          // Assign higher weight to matching MB if its error
           // score is lower. If not applying MC default behavior
           // is to weight all MBs equal.
           filter_weight = err < thresh_low