shithub: libvpx

Download patch

ref: ac86dde3afd6dd17af3ac3ebaed64fa369c62913
parent: 5572ab1d027afd6a990774daa9ae720ae3c4282d
author: Marco <[email protected]>
date: Mon Apr 4 07:05:21 EDT 2016 

vp9-denoiser: Avoid copy-block when denoising is at LowLow level.

Avoid copy-block when denoising is at LowLow level (i.e., no denoising is done).
Instead, don't enter denoiser at all, and when level goes back up over kLowLow
do a reset in denoiser.

Change-Id: I0544adf58f4dd51ecc4a4607fcb0353bfbbb7a59


--- a/vp9/encoder/vp9_denoiser.c
+++ b/vp9/encoder/vp9_denoiser.c
@@ -450,11 +450,12 @@
                                     int resized) {
   // Copy source into denoised reference buffers on KEY_FRAME or
   // if the just encoded frame was resized.
-  if (frame_type == KEY_FRAME || resized != 0) {
+  if (frame_type == KEY_FRAME || resized != 0 || denoiser->reset) {
     int i;
     // Start at 1 so as not to overwrite the INTRA_FRAME
     for (i = 1; i < MAX_REF_FRAMES; ++i)
       copy_frame(&denoiser->running_avg_y[i], &src);
+    denoiser->reset = 0;
     return;
   }
 
@@ -567,6 +568,8 @@
   denoiser->increase_denoising = 0;
   denoiser->frame_buffer_initialized = 1;
   denoiser->denoising_level = kDenLow;
+  denoiser->prev_denoising_level = kDenLow;
+  denoiser->reset = 0;
   return 0;
 }
 
@@ -586,6 +589,12 @@
 void vp9_denoiser_set_noise_level(VP9_DENOISER *denoiser,
                                   int noise_level) {
   denoiser->denoising_level = noise_level;
+  if (denoiser->denoising_level > kDenLowLow &&
+      denoiser->prev_denoising_level == kDenLowLow)
+    denoiser->reset = 1;
+  else
+    denoiser->reset = 0;
+  denoiser->prev_denoising_level = denoiser->denoising_level;
 }
 
 #ifdef OUTPUT_YUV_DENOISED
--- a/vp9/encoder/vp9_denoiser.h
+++ b/vp9/encoder/vp9_denoiser.h
@@ -40,7 +40,9 @@
   YV12_BUFFER_CONFIG last_source;
   int increase_denoising;
   int frame_buffer_initialized;
+  int reset;
   VP9_DENOISER_LEVEL denoising_level;
+  VP9_DENOISER_LEVEL prev_denoising_level;
 } VP9_DENOISER;
 
 struct VP9_COMP;
--- a/vp9/encoder/vp9_encoder.c
+++ b/vp9/encoder/vp9_encoder.c
@@ -2839,7 +2839,8 @@
              sizeof(cpi->interp_filter_selected[0]));
   }
 #if CONFIG_VP9_TEMPORAL_DENOISING
-  if (cpi->oxcf.noise_sensitivity > 0) {
+  if (cpi->oxcf.noise_sensitivity > 0 &&
+      cpi->denoiser.denoising_level > kDenLowLow) {
     vp9_denoiser_update_frame_info(&cpi->denoiser,
                                    *cpi->Source,
                                    cpi->common.frame_type,
--- a/vp9/encoder/vp9_pickmode.c
+++ b/vp9/encoder/vp9_pickmode.c
@@ -1270,7 +1270,10 @@
   }
 
 #if CONFIG_VP9_TEMPORAL_DENOISING
-  vp9_denoiser_reset_frame_stats(ctx);
+  if (cpi->oxcf.noise_sensitivity > 0 &&
+      cpi->denoiser.denoising_level > kDenLowLow) {
+    vp9_denoiser_reset_frame_stats(ctx);
+  }
 #endif
 
   if (cpi->rc.frames_since_golden == 0 && !cpi->use_svc) {
@@ -1642,7 +1645,8 @@
     }
 
 #if CONFIG_VP9_TEMPORAL_DENOISING
-    if (cpi->oxcf.noise_sensitivity > 0) {
+    if (cpi->oxcf.noise_sensitivity > 0 &&
+        cpi->denoiser.denoising_level > kDenLowLow) {
       vp9_denoiser_update_frame_stats(mi, sse_y, this_mode, ctx);
       // Keep track of zero_last cost.
       if (ref_frame == LAST_FRAME && frame_mv[this_mode][ref_frame].as_int == 0)
@@ -1823,7 +1827,9 @@
 
 #if CONFIG_VP9_TEMPORAL_DENOISING
   if (cpi->oxcf.noise_sensitivity > 0 &&
-      cpi->resize_pending == 0) {
+      cpi->resize_pending == 0 &&
+      cpi->denoiser.denoising_level > kDenLowLow &&
+      cpi->denoiser.reset == 0) {
     VP9_DENOISER_DECISION decision = COPY_BLOCK;
     vp9_denoiser_denoise(cpi, x, mi_row, mi_col, VPXMAX(BLOCK_8X8, bsize),
                          ctx, &decision);