shithub: libvpx

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Added resizing & initialization of last frame segment map

When the frame size changes the last frame segment map must
be resized to match and initialized to 0.

Change-Id: Idc10de109f55dbe9af3a6caae355a2974712243d

--- a/vp9/common/vp9_alloccommon.c

+++ b/vp9/common/vp9_alloccommon.c

@@ -58,6 +58,7 @@

   vpx_free(oci->mip);

   vpx_free(oci->prev_mip);

   vpx_free(oci->above_seg_context);

+  vpx_free(oci->last_frame_seg_map);

   vpx_free(oci->above_context[0]);

   for (i = 0; i < MAX_MB_PLANE; i++)

@@ -65,6 +66,7 @@

   oci->mip = NULL;

   oci->prev_mip = NULL;

   oci->above_seg_context = NULL;

+  oci->last_frame_seg_map = NULL;

 }

 static void set_mb_mi(VP9_COMMON *cm, int aligned_width, int aligned_height) {

@@ -157,6 +159,11 @@

   if (!oci->above_seg_context)

     goto fail;

+  // Create the segmentation map structure and set to 0.

+  oci->last_frame_seg_map = vpx_calloc(oci->mi_rows * oci->mi_cols, 1);

+  if (!oci->last_frame_seg_map)

+    goto fail;

+

   return 0;

  fail:

@@ -198,4 +205,8 @@

   for (i = 1; i < MAX_MB_PLANE; i++)

     cm->above_context[i] =

         cm->above_context[0] + i * sizeof(ENTROPY_CONTEXT) * 2 * mi_cols;

+

+  // Initialize the previous frame segment map to 0.

+  if (cm->last_frame_seg_map)

+    vpx_memset(cm->last_frame_seg_map, 0, cm->mi_rows * cm->mi_cols);

 }

--- a/vp9/decoder/vp9_decodframe.c

+++ b/vp9/decoder/vp9_decodframe.c

@@ -989,11 +989,6 @@

   new_fb->corrupted |= read_compressed_header(pbi, data, first_partition_size);

-  // Create the segmentation map structure and set to 0

-  if (!pc->last_frame_seg_map)

-    CHECK_MEM_ERROR(pc, pc->last_frame_seg_map,

-                    vpx_calloc((pc->mi_rows * pc->mi_cols), 1));

-

   setup_block_dptrs(xd, pc->subsampling_x, pc->subsampling_y);

   // clear out the coeff buffer

--- a/vp9/decoder/vp9_onyxd_if.c

+++ b/vp9/decoder/vp9_onyxd_if.c

@@ -160,9 +160,6 @@

   if (!pbi)

     return;

-  if (pbi->common.last_frame_seg_map)

-    vpx_free(pbi->common.last_frame_seg_map);

-

   vp9_remove_common(&pbi->common);

   vp9_worker_end(&pbi->lf_worker);

   vpx_free(pbi->lf_worker.data1);