Adding alloc_mi() function.

Change-Id: I3b944884c048f589c86e0169aeb3c3855bc8b729

vp9/common/vp9_alloccommon.c

@@ -8,7 +8,6 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-
 #include "./vpx_config.h"
 #include "vpx_mem/vpx_mem.h"
 
@@ -30,34 +29,6 @@ void vp9_update_mode_info_border(VP9_COMMON *cm, MODE_INFO *mi) {
     vpx_memset(&mi[i * stride], 0, sizeof(MODE_INFO));
 }
 
-void vp9_free_frame_buffers(VP9_COMMON *cm) {
-  int i;
-
-  for (i = 0; i < FRAME_BUFFERS; i++) {
-    vp9_free_frame_buffer(&cm->frame_bufs[i].buf);
-
-    if (cm->frame_bufs[i].ref_count > 0 &&
-        cm->frame_bufs[i].raw_frame_buffer.data != NULL) {
-      cm->release_fb_cb(cm->cb_priv, &cm->frame_bufs[i].raw_frame_buffer);
-      cm->frame_bufs[i].ref_count = 0;
-    }
-  }
-
-  vp9_free_frame_buffer(&cm->post_proc_buffer);
-
-  vpx_free(cm->mip);
-  vpx_free(cm->prev_mip);
-  vpx_free(cm->last_frame_seg_map);
-  vpx_free(cm->mi_grid_base);
-  vpx_free(cm->prev_mi_grid_base);
-
-  cm->mip = NULL;
-  cm->prev_mip = NULL;
-  cm->last_frame_seg_map = NULL;
-  cm->mi_grid_base = NULL;
-  cm->prev_mi_grid_base = NULL;
-}
-
 static void set_mb_mi(VP9_COMMON *cm, int aligned_width, int aligned_height) {
   cm->mi_cols = aligned_width >> MI_SIZE_LOG2;
   cm->mi_rows = aligned_height >> MI_SIZE_LOG2;
@@ -75,7 +46,7 @@ static void setup_mi(VP9_COMMON *cm) {
   cm->prev_mi_grid_visible = cm->prev_mi_grid_base + cm->mode_info_stride + 1;
 
   vpx_memset(cm->mip, 0,
-             cm->mode_info_stride * (cm->mi_rows + 1) * sizeof(MODE_INFO));
+             cm->mode_info_stride * (cm->mi_rows + 1) * sizeof(*cm->mip));
 
   vpx_memset(cm->mi_grid_base, 0,
              cm->mode_info_stride * (cm->mi_rows + 1) *
@@ -84,12 +55,66 @@ static void setup_mi(VP9_COMMON *cm) {
   vp9_update_mode_info_border(cm, cm->prev_mip);
 }
 
+static int alloc_mi(VP9_COMMON *cm, int mi_size) {
+  cm->mip = (MODE_INFO *)vpx_calloc(mi_size, sizeof(*cm->mip));
+  if (cm->mip == NULL)
+    return 1;
+
+  cm->prev_mip = (MODE_INFO *)vpx_calloc(mi_size, sizeof(*cm->prev_mip));
+  if (cm->prev_mip == NULL)
+    return 1;
+
+  cm->mi_grid_base =
+      (MODE_INFO **)vpx_calloc(mi_size, sizeof(*cm->mi_grid_base));
+  if (cm->mi_grid_base == NULL)
+    return 1;
+
+  cm->prev_mi_grid_base =
+      (MODE_INFO **)vpx_calloc(mi_size, sizeof(*cm->prev_mi_grid_base));
+  if (cm->prev_mi_grid_base == NULL)
+    return 1;
+
+  return 0;
+}
+
+static void free_mi(VP9_COMMON *cm) {
+  vpx_free(cm->mip);
+  vpx_free(cm->prev_mip);
+  vpx_free(cm->mi_grid_base);
+  vpx_free(cm->prev_mi_grid_base);
+
+  cm->mip = NULL;
+  cm->prev_mip = NULL;
+  cm->mi_grid_base = NULL;
+  cm->prev_mi_grid_base = NULL;
+}
+
+void vp9_free_frame_buffers(VP9_COMMON *cm) {
+  int i;
+
+  for (i = 0; i < FRAME_BUFFERS; ++i) {
+    vp9_free_frame_buffer(&cm->frame_bufs[i].buf);
+
+    if (cm->frame_bufs[i].ref_count > 0 &&
+        cm->frame_bufs[i].raw_frame_buffer.data != NULL) {
+      cm->release_fb_cb(cm->cb_priv, &cm->frame_bufs[i].raw_frame_buffer);
+      cm->frame_bufs[i].ref_count = 0;
+    }
+  }
+
+  vp9_free_frame_buffer(&cm->post_proc_buffer);
+
+  free_mi(cm);
+
+  vpx_free(cm->last_frame_seg_map);
+  cm->last_frame_seg_map = NULL;
+}
+
 int vp9_resize_frame_buffers(VP9_COMMON *cm, int width, int height) {
   const int aligned_width = ALIGN_POWER_OF_TWO(width, MI_SIZE_LOG2);
   const int aligned_height = ALIGN_POWER_OF_TWO(height, MI_SIZE_LOG2);
   const int ss_x = cm->subsampling_x;
   const int ss_y = cm->subsampling_y;
-  int mi_size;
 
   if (vp9_realloc_frame_buffer(&cm->post_proc_buffer, width, height, ss_x, ss_y,
                                VP9_DEC_BORDER_IN_PIXELS, NULL, NULL, NULL) < 0)
@@ -97,29 +122,8 @@ int vp9_resize_frame_buffers(VP9_COMMON *cm, int width, int height) {
 
   set_mb_mi(cm, aligned_width, aligned_height);
 
-  // Allocation
-  mi_size = cm->mode_info_stride * (cm->mi_rows + MI_BLOCK_SIZE);
-
-  vpx_free(cm->mip);
-  cm->mip = (MODE_INFO *)vpx_calloc(mi_size, sizeof(MODE_INFO));
-  if (!cm->mip)
-    goto fail;
-
-  vpx_free(cm->prev_mip);
-  cm->prev_mip = (MODE_INFO *)vpx_calloc(mi_size, sizeof(MODE_INFO));
-  if (!cm->prev_mip)
-    goto fail;
-
-  vpx_free(cm->mi_grid_base);
-  cm->mi_grid_base =
-      (MODE_INFO **)vpx_calloc(mi_size, sizeof(*cm->mi_grid_base));
-  if (!cm->mi_grid_base)
-    goto fail;
-
-  vpx_free(cm->prev_mi_grid_base);
-  cm->prev_mi_grid_base =
-      (MODE_INFO **)vpx_calloc(mi_size, sizeof(*cm->prev_mi_grid_base));
-  if (!cm->prev_mi_grid_base)
+  free_mi(cm);
+  if (alloc_mi(cm, cm->mode_info_stride * (cm->mi_rows + MI_BLOCK_SIZE)))
     goto fail;
 
   setup_mi(cm);
@@ -144,7 +148,6 @@ int vp9_alloc_frame_buffers(VP9_COMMON *cm, int width, int height) {
   const int aligned_height = ALIGN_POWER_OF_TWO(height, MI_SIZE_LOG2);
   const int ss_x = cm->subsampling_x;
   const int ss_y = cm->subsampling_y;
-  int mi_size;
 
   vp9_free_frame_buffers(cm);
 
@@ -169,25 +172,7 @@ int vp9_alloc_frame_buffers(VP9_COMMON *cm, int width, int height) {
 
   set_mb_mi(cm, aligned_width, aligned_height);
 
-  // Allocation
-  mi_size = cm->mode_info_stride * (cm->mi_rows + MI_BLOCK_SIZE);
-
-  cm->mip = (MODE_INFO *)vpx_calloc(mi_size, sizeof(MODE_INFO));
-  if (!cm->mip)
-    goto fail;
-
-  cm->prev_mip = (MODE_INFO *)vpx_calloc(mi_size, sizeof(MODE_INFO));
-  if (!cm->prev_mip)
-    goto fail;
-
-  cm->mi_grid_base =
-      (MODE_INFO **)vpx_calloc(mi_size, sizeof(*cm->mi_grid_base));
-  if (!cm->mi_grid_base)
-    goto fail;
-
-  cm->prev_mi_grid_base =
-      (MODE_INFO **)vpx_calloc(mi_size, sizeof(*cm->prev_mi_grid_base));
-  if (!cm->prev_mi_grid_base)
+  if (alloc_mi(cm, cm->mode_info_stride * (cm->mi_rows + MI_BLOCK_SIZE)))
     goto fail;
 
   setup_mi(cm);