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Set the threads/tile_columns in vpx_temporal_svc_encoder.

Change-Id: I794e8b64f26ebe68d7f18c3a11cb7c80e1cd3110

--- a/examples/vpx_temporal_svc_encoder.c

+++ b/examples/vpx_temporal_svc_encoder.c

@@ -610,6 +610,9 @@

   cfg.rc_buf_optimal_sz = 600;

   cfg.rc_buf_sz = 1000;

+  // Use 1 thread as default.

+  cfg.g_threads = 1;

+

   // Enable error resilient mode.

   cfg.g_error_resilient = 1;

   cfg.g_lag_in_frames   = 0;

@@ -675,6 +678,7 @@

       vpx_codec_control(&codec, VP9E_SET_FRAME_PERIODIC_BOOST, 0);

       vpx_codec_control(&codec, VP9E_SET_NOISE_SENSITIVITY, 0);

       vpx_codec_control(&codec, VP8E_SET_STATIC_THRESHOLD, 0);

+      vpx_codec_control(&codec, VP9E_SET_TILE_COLUMNS, (cfg.g_threads >> 1));

       if (vpx_codec_control(&codec, VP9E_SET_SVC, layering_mode > 0 ? 1: 0)) {

         die_codec(&codec, "Failed to set SVC");

     }