shithub: libvpx

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Correct the first pass motion vector scale

Change-Id: I005a648f7f9ead9d36a39330dfbb096919affb34

--- a/vp9/simple_encode.cc

+++ b/vp9/simple_encode.cc

@@ -167,7 +167,8 @@

 static void update_motion_vector_info(

     const MOTION_VECTOR_INFO *input_motion_vector_info, const int num_rows_4x4,

-    const int num_cols_4x4, MotionVectorInfo *output_motion_vector_info) {

+    const int num_cols_4x4, MotionVectorInfo *output_motion_vector_info,

+    int motion_vector_scale) {

   const int num_units_4x4 = num_rows_4x4 * num_cols_4x4;

   for (int i = 0; i < num_units_4x4; ++i) {

     const MV_REFERENCE_FRAME *in_ref_frame =

@@ -185,16 +186,16 @@

         mv_ref_frame_to_ref_frame_type(in_ref_frame[1]);

     output_motion_vector_info[i].mv_row[0] =

         (double)input_motion_vector_info[i].mv[0].as_mv.row /

-        kMotionVectorPrecision;

+        motion_vector_scale;

     output_motion_vector_info[i].mv_column[0] =

         (double)input_motion_vector_info[i].mv[0].as_mv.col /

-        kMotionVectorPrecision;

+        motion_vector_scale;

     output_motion_vector_info[i].mv_row[1] =

         (double)input_motion_vector_info[i].mv[1].as_mv.row /

-        kMotionVectorPrecision;

+        motion_vector_scale;

     output_motion_vector_info[i].mv_column[1] =

         (double)input_motion_vector_info[i].mv[1].as_mv.col /

-        kMotionVectorPrecision;

+        motion_vector_scale;

   }

 }

@@ -523,7 +524,8 @@

   update_motion_vector_info(encode_frame_info->motion_vector_info,

                             encode_frame_result->num_rows_4x4,

                             encode_frame_result->num_cols_4x4,

-                            &encode_frame_result->motion_vector_info[0]);

+                            &encode_frame_result->motion_vector_info[0],

+                            kMotionVectorSubPixelPrecision);

   update_frame_counts(&encode_frame_info->frame_counts,

                       &encode_frame_result->frame_counts);

   encode_frame_result_update_rq_history(&encode_frame_info->rq_history,

@@ -793,7 +795,8 @@

         // Get vp9 first pass motion vector info.

         std::vector<MotionVectorInfo> mv_info(num_rows_16x16 * num_cols_16x16);

         update_motion_vector_info(cpi->fp_motion_vector_info, num_rows_16x16,

-                                  num_cols_16x16, mv_info.data());

+                                  num_cols_16x16, mv_info.data(),

+                                  kMotionVectorFullPixelPrecision);

         fp_motion_vector_info_.push_back(mv_info);

       }

       impl_ptr_->first_pass_stats.push_back(vp9_get_frame_stats(&cpi->twopass));

--- a/vp9/simple_encode.h

+++ b/vp9/simple_encode.h

@@ -58,7 +58,8 @@

   int height;        // prediction block height

 };

-constexpr int kMotionVectorPrecision = 8;

+constexpr int kMotionVectorSubPixelPrecision = 8;

+constexpr int kMotionVectorFullPixelPrecision = 1;

 // In the first pass. The frame is split to 16x16 blocks.

 // This structure contains the information of each 16x16 block.