shithub: libvpx

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Optimize the code to set the refernce frame right after reading the header.

Change-Id: I495cf4a366e06e3220ed132500b1ba1c8448f708

--- a/vp9/decoder/vp9_decodeframe.c

+++ b/vp9/decoder/vp9_decodeframe.c

@@ -384,18 +384,6 @@

   return &xd->mi[0].mbmi;

 }

-static void set_ref(VP9_COMMON *const cm, MACROBLOCKD *const xd,

-                    int idx, int mi_row, int mi_col) {

-  MB_MODE_INFO *const mbmi = &xd->mi[0].src_mi->mbmi;

-  RefBuffer *ref_buffer = &cm->frame_refs[mbmi->ref_frame[idx] - LAST_FRAME];

-  xd->block_refs[idx] = ref_buffer;

-  if (ref_buffer->buf->corrupted)

-    vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

-                       "Block reference is corrupt");

-  vp9_setup_pre_planes(xd, idx, ref_buffer->buf, mi_row, mi_col,

-                       &ref_buffer->sf);

-}

-

 static void decode_block(VP9_COMMON *const cm, MACROBLOCKD *const xd,

                          const TileInfo *const tile,

                          int mi_row, int mi_col,

@@ -420,11 +408,6 @@

     vp9_foreach_transformed_block(xd, bsize,

                                   predict_and_reconstruct_intra_block, &arg);

   } else {

-    // Setup

-    set_ref(cm, xd, 0, mi_row, mi_col);

-    if (has_second_ref(mbmi))

-      set_ref(cm, xd, 1, mi_row, mi_col);

-

     // Prediction

     vp9_dec_build_inter_predictors_sb(xd, mi_row, mi_col, bsize);

--- a/vp9/decoder/vp9_decodemv.c

+++ b/vp9/decoder/vp9_decodemv.c

@@ -435,10 +435,16 @@

   for (ref = 0; ref < 1 + is_compound; ++ref) {

     const MV_REFERENCE_FRAME frame = mbmi->ref_frame[ref];

-    const int ref_idx = frame - LAST_FRAME;

-    if ((!vp9_is_valid_scale(&cm->frame_refs[ref_idx].sf)))

+    RefBuffer *ref_buf = &cm->frame_refs[frame - LAST_FRAME];

+    xd->block_refs[ref] = ref_buf;

+    if ((!vp9_is_valid_scale(&ref_buf->sf)))

       vpx_internal_error(&cm->error, VPX_CODEC_UNSUP_BITSTREAM,

                          "Reference frame has invalid dimensions");

+    if (ref_buf->buf->corrupted)

+      vpx_internal_error(&cm->error, VPX_CODEC_CORRUPT_FRAME,

+                         "Block reference is corrupt");

+    vp9_setup_pre_planes(xd, ref, ref_buf->buf, mi_row, mi_col,

+                         &ref_buf->sf);

     vp9_find_mv_refs(cm, xd, tile, mi, frame, mbmi->ref_mvs[frame],

                      mi_row, mi_col);

   }