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vp9: Allocate alt-ref in denoiser for SVC.

When SVC is used, allocate alt-ref in denoiser.

Change-Id: I1b17221b55b9444cd23b97d481b54ff8d296d857

--- a/vp9/encoder/vp9_denoiser.c

+++ b/vp9/encoder/vp9_denoiser.c

@@ -444,7 +444,7 @@

       svc_base_is_key) {

     int i;

     // Start at 1 so as not to overwrite the INTRA_FRAME

-    for (i = 1; i < DENOISER_REF_FRAMES; ++i)

+    for (i = 1; i < denoiser->num_ref_frames; ++i)

       copy_frame(&denoiser->running_avg_y[i], &src);

     denoiser->reset = 0;

     return;

@@ -512,8 +512,8 @@

   }

 }

-int vp9_denoiser_alloc(VP9_DENOISER *denoiser, int width, int height, int ssx,

-                       int ssy,

+int vp9_denoiser_alloc(VP9_COMMON *cm, int use_svc, VP9_DENOISER *denoiser,

+                       int width, int height, int ssx, int ssy,

 #if CONFIG_VP9_HIGHBITDEPTH

                        int use_highbitdepth,

 #endif

@@ -522,7 +522,11 @@

   const int legacy_byte_alignment = 0;

   assert(denoiser != NULL);

-  for (i = 0; i < DENOISER_REF_FRAMES; ++i) {

+  denoiser->num_ref_frames = use_svc ? MAX_REF_FRAMES : NONSVC_REF_FRAMES;

+  CHECK_MEM_ERROR(

+      cm, denoiser->running_avg_y,

+      vpx_calloc(denoiser->num_ref_frames, sizeof(denoiser->running_avg_y[0])));

+  for (i = 0; i < denoiser->num_ref_frames; ++i) {

     fail = vpx_alloc_frame_buffer(&denoiser->running_avg_y[i], width, height,

                                   ssx, ssy,

 #if CONFIG_VP9_HIGHBITDEPTH

@@ -574,9 +578,11 @@

     return;

   }

   denoiser->frame_buffer_initialized = 0;

-  for (i = 0; i < DENOISER_REF_FRAMES; ++i) {

+  for (i = 0; i < denoiser->num_ref_frames; ++i) {

     vpx_free_frame_buffer(&denoiser->running_avg_y[i]);

   }

+  vpx_free(denoiser->running_avg_y);

+  denoiser->running_avg_y = NULL;

   vpx_free_frame_buffer(&denoiser->mc_running_avg_y);

   vpx_free_frame_buffer(&denoiser->last_source);

 }

--- a/vp9/encoder/vp9_denoiser.h

+++ b/vp9/encoder/vp9_denoiser.h

@@ -21,9 +21,9 @@

 #define MOTION_MAGNITUDE_THRESHOLD (8 * 3)

-// Denoiser is used in real-time mode which does not use alt-ref, so no need to

-// allocate for it, and hence we need MAX_REF_FRAME - 1

-#define DENOISER_REF_FRAMES MAX_REF_FRAMES - 1

+// Denoiser is used in non svc real-time mode which does not use alt-ref, so no

+// need to allocate for it, and hence we need MAX_REF_FRAME - 1

+#define NONSVC_REF_FRAMES MAX_REF_FRAMES - 1

 typedef enum vp9_denoiser_decision {

   COPY_BLOCK,

@@ -39,11 +39,12 @@

 } VP9_DENOISER_LEVEL;

 typedef struct vp9_denoiser {

-  YV12_BUFFER_CONFIG running_avg_y[DENOISER_REF_FRAMES];

+  YV12_BUFFER_CONFIG *running_avg_y;

   YV12_BUFFER_CONFIG mc_running_avg_y;

   YV12_BUFFER_CONFIG last_source;

   int frame_buffer_initialized;

   int reset;

+  int num_ref_frames;

   VP9_DENOISER_LEVEL denoising_level;

   VP9_DENOISER_LEVEL prev_denoising_level;

 } VP9_DENOISER;

@@ -80,8 +81,8 @@

                                      PREDICTION_MODE mode,

                                      PICK_MODE_CONTEXT *ctx);

-int vp9_denoiser_alloc(VP9_DENOISER *denoiser, int width, int height, int ssx,

-                       int ssy,

+int vp9_denoiser_alloc(VP9_COMMON *cm, int use_svc, VP9_DENOISER *denoiser,

+                       int width, int height, int ssx, int ssy,

 #if CONFIG_VP9_HIGHBITDEPTH

                        int use_highbitdepth,

 #endif

--- a/vp9/encoder/vp9_encoder.c

+++ b/vp9/encoder/vp9_encoder.c

@@ -3234,8 +3234,8 @@

   VP9_COMMON *const cm = &cpi->common;

   if (cpi->oxcf.noise_sensitivity > 0 &&

       !cpi->denoiser.frame_buffer_initialized) {

-    if (vp9_denoiser_alloc(&cpi->denoiser, cm->width, cm->height,

-                           cm->subsampling_x, cm->subsampling_y,

+    if (vp9_denoiser_alloc(cm, cpi->use_svc, &cpi->denoiser, cm->width,

+                           cm->height, cm->subsampling_x, cm->subsampling_y,

 #if CONFIG_VP9_HIGHBITDEPTH

                            cm->use_highbitdepth,

 #endif