shithub: libvpx

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VP9 noise estimate: no noise estimate if frame size change.

Change-Id: I521f7b53c143d562a88fe7de330aa3f0ef09f414

--- a/vp9/encoder/vp9_noise_estimate.c

+++ b/vp9/encoder/vp9_noise_estimate.c

@@ -29,6 +29,8 @@

   ne->value = 0;

   ne->count = 0;

   ne->thresh = 90;

+  ne->last_w = 0;

+  ne->last_h = 0;

   if (width * height >= 1920 * 1080) {

     ne->thresh = 200;

   } else if (width * height >= 1280 * 720) {

@@ -100,11 +102,17 @@

   ne->enabled = enable_noise_estimation(cpi);

   if (!ne->enabled ||

       cm->current_video_frame % frame_period != 0 ||

-      last_source == NULL) {

+      last_source == NULL ||

+      ne->last_w != cm->width ||

+      ne->last_h != cm->height) {

 #if CONFIG_VP9_TEMPORAL_DENOISING

   if (cpi->oxcf.noise_sensitivity > 0)

     copy_frame(&cpi->denoiser.last_source, cpi->Source);

 #endif

+    if (last_source != NULL) {

+      ne->last_w = cm->width;

+      ne->last_h = cm->height;

+    }

     return;

   } else {

     int num_samples = 0;

@@ -185,6 +193,8 @@

       src_u += (src_uvstride << 2) - (cm->mi_cols << 2);

       src_v += (src_uvstride << 2) - (cm->mi_cols << 2);

     }

+    ne->last_w = cm->width;

+    ne->last_h = cm->height;

     // Update noise estimate if we have at a minimum number of block samples,

     // and avg_est > 0 (avg_est == 0 can happen if the application inputs

     // duplicate frames).

--- a/vp9/encoder/vp9_noise_estimate.h

+++ b/vp9/encoder/vp9_noise_estimate.h

@@ -35,6 +35,8 @@

   int value;

   int thresh;

   int count;

+  int last_w;

+  int last_h;

 } NOISE_ESTIMATE;

 struct VP9_COMP;