Fix to denoiser with dynamic resize.

Temporary fix to denoiser when dynamic resizing is on.
 -Reallocate denoiser buffers on resized frame.
 -Force golden update on resized frame.
 -Don't denoise resized frame, and copy source into denoised buffers.

Change-Id: Ife7638173b76a1c49eac7da4f2a30c9c1f4e2000

vp9/encoder/vp9_denoiser.c

@@ -375,8 +375,11 @@ void vp9_denoiser_update_frame_info(VP9_DENOISER *denoiser,
                                     FRAME_TYPE frame_type,
                                     int refresh_alt_ref_frame,
                                     int refresh_golden_frame,
-                                    int refresh_last_frame) {
+                                    int refresh_last_frame,
-  if (frame_type == KEY_FRAME) {
+                                    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) {
     int i;
     // Start at 1 so as not to overwrite the INTRA_FRAME
     for (i = 1; i < MAX_REF_FRAMES; ++i)
@@ -462,7 +465,6 @@ int vp9_denoiser_alloc(VP9_DENOISER *denoiser, int width, int height,
 #endif
   denoiser->increase_denoising = 0;
   denoiser->frame_buffer_initialized = 1;
-
   return 0;
 }
 

vp9/encoder/vp9_denoiser.h

@@ -37,7 +37,8 @@ void vp9_denoiser_update_frame_info(VP9_DENOISER *denoiser,
                                     FRAME_TYPE frame_type,
                                     int refresh_alt_ref_frame,
                                     int refresh_golden_frame,
-                                    int refresh_last_frame);
+                                    int refresh_last_frame,
+                                    int resized);
 
 void vp9_denoiser_denoise(VP9_DENOISER *denoiser, MACROBLOCK *mb,
                           int mi_row, int mi_col, BLOCK_SIZE bs,

vp9/encoder/vp9_encodeframe.c

@@ -1739,8 +1739,10 @@ static void encode_b_rt(VP9_COMP *cpi, ThreadData *td,
   update_state_rt(cpi, td, ctx, mi_row, mi_col, bsize);
 
 #if CONFIG_VP9_TEMPORAL_DENOISING
-  if (cpi->oxcf.noise_sensitivity > 0 && output_enabled &&
+  if (cpi->oxcf.noise_sensitivity > 0 &&
-      cpi->common.frame_type != KEY_FRAME) {
+      output_enabled &&
+      cpi->common.frame_type != KEY_FRAME &&
+      cpi->resize_pending == 0) {
     vp9_denoiser_denoise(&cpi->denoiser, x, mi_row, mi_col,
                          VPXMAX(BLOCK_8X8, bsize), ctx);
   }

vp9/encoder/vp9_encoder.c

@@ -2756,7 +2756,8 @@ void vp9_update_reference_frames(VP9_COMP *cpi) {
                                    cpi->common.frame_type,
                                    cpi->refresh_alt_ref_frame,
                                    cpi->refresh_golden_frame,
-                                   cpi->refresh_last_frame);
+                                   cpi->refresh_last_frame,
+                                   cpi->resize_pending);
   }
 #endif
 }
@@ -3099,6 +3100,21 @@ static void set_size_dependent_vars(VP9_COMP *cpi, int *q,
 #endif  // CONFIG_VP9_POSTPROC
 }
 
+#if CONFIG_VP9_TEMPORAL_DENOISING
+static void setup_denoiser_buffer(VP9_COMP *cpi) {
+  VP9_COMMON *const cm = &cpi->common;
+  if (cpi->oxcf.noise_sensitivity > 0 &&
+      !cpi->denoiser.frame_buffer_initialized) {
+    vp9_denoiser_alloc(&(cpi->denoiser), cm->width, cm->height,
+                       cm->subsampling_x, cm->subsampling_y,
+#if CONFIG_VP9_HIGHBITDEPTH
+                       cm->use_highbitdepth,
+#endif
+                       VP9_ENC_BORDER_IN_PIXELS);
+  }
+}
+#endif
+
 static void init_motion_estimation(VP9_COMP *cpi) {
   int y_stride = cpi->scaled_source.y_stride;
 
@@ -3143,6 +3159,17 @@ static void set_frame_size(VP9_COMP *cpi) {
 
     // TODO(agrange) Scale cpi->max_mv_magnitude if frame-size has changed.
     set_mv_search_params(cpi);
+
+#if CONFIG_VP9_TEMPORAL_DENOISING
+    // Reset the denoiser on the resized frame.
+    if (cpi->oxcf.noise_sensitivity > 0) {
+      vp9_denoiser_free(&(cpi->denoiser));
+      setup_denoiser_buffer(cpi);
+      // Dynamic resize is only triggered for non-SVC, so we can force
+      // golden frame update here as temporary fix to denoiser.
+      cpi->refresh_golden_frame = 1;
+    }
+#endif
   }
 
   if ((oxcf->pass == 2) &&
@@ -3983,21 +4010,6 @@ static void check_initial_width(VP9_COMP *cpi,
   }
 }
 
-#if CONFIG_VP9_TEMPORAL_DENOISING
-static void setup_denoiser_buffer(VP9_COMP *cpi) {
-  VP9_COMMON *const cm = &cpi->common;
-  if (cpi->oxcf.noise_sensitivity > 0 &&
-      !cpi->denoiser.frame_buffer_initialized) {
-    vp9_denoiser_alloc(&(cpi->denoiser), cm->width, cm->height,
-                       cm->subsampling_x, cm->subsampling_y,
-#if CONFIG_VP9_HIGHBITDEPTH
-                       cm->use_highbitdepth,
-#endif
-                       VP9_ENC_BORDER_IN_PIXELS);
-  }
-}
-#endif
-
 int vp9_receive_raw_frame(VP9_COMP *cpi, unsigned int frame_flags,
                           YV12_BUFFER_CONFIG *sd, int64_t time_stamp,
                           int64_t end_time) {