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vp9_spatial_svc_encoder: Add encoding time log.

Change-Id: Iab4e4a13a65c9dc5314e5107b126c30667c7b448

--- a/examples/vp9_spatial_svc_encoder.c

+++ b/examples/vp9_spatial_svc_encoder.c

@@ -25,6 +25,7 @@

 #include "../tools_common.h"

 #include "../video_writer.h"

+#include "../vpx_ports/vpx_timer.h"

 #include "vpx/svc_context.h"

 #include "vpx/vp8cx.h"

 #include "vpx/vpx_encoder.h"

@@ -564,6 +565,8 @@

   double sum_bitrate2 = 0.0;

   double framerate  = 30.0;

 #endif

+  struct vpx_usec_timer timer;

+  int64_t cx_time = 0;

   memset(&svc_ctx, 0, sizeof(svc_ctx));

   svc_ctx.log_print = 1;

   exec_name = argv[0];

@@ -643,9 +646,12 @@

       end_of_stream = 1;

     }

+    vpx_usec_timer_start(&timer);

     res = vpx_svc_encode(&svc_ctx, &codec, (end_of_stream ? NULL : &raw),

                          pts, frame_duration, svc_ctx.speed >= 5 ?

                          VPX_DL_REALTIME : VPX_DL_GOOD_QUALITY);

+    vpx_usec_timer_mark(&timer);

+    cx_time += vpx_usec_timer_elapsed(&timer);

     printf("%s", vpx_svc_get_message(&svc_ctx));

     if (res != VPX_CODEC_OK) {

@@ -784,6 +790,10 @@

     }

   }

 #endif

+  printf("Frame cnt and encoding time/FPS stats for encoding: %d %f %f \n",

+         frame_cnt,

+         1000 * (float)cx_time / (double)(frame_cnt * 1000000),

+         1000000 * (double)frame_cnt / (double)cx_time);

   vpx_img_free(&raw);

   // display average size, psnr

   printf("%s", vpx_svc_dump_statistics(&svc_ctx));