diff --git a/vp9/vp9_cx_iface.c b/vp9/vp9_cx_iface.c
index 45609da87..9326165ed 100644
--- a/vp9/vp9_cx_iface.c
+++ b/vp9/vp9_cx_iface.c
@@ -543,31 +543,6 @@ static vpx_codec_err_t vp8e_destroy(vpx_codec_alg_priv_t *ctx) {
   return VPX_CODEC_OK;
 }
 
-static vpx_codec_err_t image2yuvconfig(const vpx_image_t   *img,
-                                       YV12_BUFFER_CONFIG  *yv12) {
-  vpx_codec_err_t        res = VPX_CODEC_OK;
-  yv12->y_buffer = img->planes[VPX_PLANE_Y];
-  yv12->u_buffer = img->planes[VPX_PLANE_U];
-  yv12->v_buffer = img->planes[VPX_PLANE_V];
-
-  yv12->y_crop_width  = img->d_w;
-  yv12->y_crop_height = img->d_h;
-  yv12->y_width  = img->d_w;
-  yv12->y_height = img->d_h;
-
-  yv12->uv_width = img->x_chroma_shift == 1 ? (1 + yv12->y_width) / 2
-                                            : yv12->y_width;
-  yv12->uv_height = img->y_chroma_shift == 1 ? (1 + yv12->y_height) / 2
-                                             : yv12->y_height;
-
-  yv12->y_stride = img->stride[VPX_PLANE_Y];
-  yv12->uv_stride = img->stride[VPX_PLANE_U];
-
-  yv12->border  = (img->stride[VPX_PLANE_Y] - img->w) / 2;
-  yv12->clrtype = REG_YUV;
-  return res;
-}
-
 static void pick_quickcompress_mode(vpx_codec_alg_priv_t  *ctx,
                                     unsigned long          duration,
                                     unsigned long          deadline) {
diff --git a/vp9/vp9_dx_iface.c b/vp9/vp9_dx_iface.c
index 85022c951..811cea7f4 100644
--- a/vp9/vp9_dx_iface.c
+++ b/vp9/vp9_dx_iface.c
@@ -578,30 +578,6 @@ static vpx_codec_err_t vp8_xma_set_mmap(vpx_codec_ctx_t         *ctx,
   return res;
 }
 
-static vpx_codec_err_t image2yuvconfig(const vpx_image_t   *img,
-                                       YV12_BUFFER_CONFIG  *yv12) {
-  vpx_codec_err_t        res = VPX_CODEC_OK;
-  yv12->y_buffer = img->planes[VPX_PLANE_Y];
-  yv12->u_buffer = img->planes[VPX_PLANE_U];
-  yv12->v_buffer = img->planes[VPX_PLANE_V];
-
-  yv12->y_crop_width  = img->d_w;
-  yv12->y_crop_height = img->d_h;
-  yv12->y_width  = img->d_w;
-  yv12->y_height = img->d_h;
-  yv12->uv_width = yv12->y_width / 2;
-  yv12->uv_height = yv12->y_height / 2;
-
-  yv12->y_stride = img->stride[VPX_PLANE_Y];
-  yv12->uv_stride = img->stride[VPX_PLANE_U];
-
-  yv12->border  = (img->stride[VPX_PLANE_Y] - img->d_w) / 2;
-  yv12->clrtype = (img->fmt == VPX_IMG_FMT_VPXI420 ||
-                   img->fmt == VPX_IMG_FMT_VPXYV12);
-
-  return res;
-}
-
 
 static vpx_codec_err_t vp9_set_reference(vpx_codec_alg_priv_t *ctx,
                                          int ctr_id,
diff --git a/vp9/vp9_iface_common.h b/vp9/vp9_iface_common.h
index 96de5f548..84b4d398b 100644
--- a/vp9/vp9_iface_common.h
+++ b/vp9/vp9_iface_common.h
@@ -37,11 +37,11 @@ static void yuvconfig2image(vpx_image_t *img, const YV12_BUFFER_CONFIG  *yv12,
   img->planes[VPX_PLANE_Y] = yv12->y_buffer;
   img->planes[VPX_PLANE_U] = yv12->u_buffer;
   img->planes[VPX_PLANE_V] = yv12->v_buffer;
-  img->planes[VPX_PLANE_ALPHA] = NULL;
+  img->planes[VPX_PLANE_ALPHA] = yv12->alpha_buffer;
   img->stride[VPX_PLANE_Y] = yv12->y_stride;
   img->stride[VPX_PLANE_U] = yv12->uv_stride;
   img->stride[VPX_PLANE_V] = yv12->uv_stride;
-  img->stride[VPX_PLANE_ALPHA] = yv12->y_stride;
+  img->stride[VPX_PLANE_ALPHA] = yv12->alpha_stride;
   img->bps = bps;
   img->user_priv = user_priv;
   img->img_data = yv12->buffer_alloc;
@@ -49,4 +49,34 @@ static void yuvconfig2image(vpx_image_t *img, const YV12_BUFFER_CONFIG  *yv12,
   img->self_allocd = 0;
 }
 
+static vpx_codec_err_t image2yuvconfig(const vpx_image_t *img,
+                                       YV12_BUFFER_CONFIG *yv12) {
+  yv12->y_buffer = img->planes[VPX_PLANE_Y];
+  yv12->u_buffer = img->planes[VPX_PLANE_U];
+  yv12->v_buffer = img->planes[VPX_PLANE_V];
+  yv12->alpha_buffer = img->planes[VPX_PLANE_ALPHA];
+
+  yv12->y_crop_width  = img->d_w;
+  yv12->y_crop_height = img->d_h;
+  yv12->y_width  = img->d_w;
+  yv12->y_height = img->d_h;
+
+  yv12->uv_width = img->x_chroma_shift == 1 ? (1 + yv12->y_width) / 2
+                                            : yv12->y_width;
+  yv12->uv_height = img->y_chroma_shift == 1 ? (1 + yv12->y_height) / 2
+                                             : yv12->y_height;
+
+  yv12->alpha_width = yv12->alpha_buffer ? img->d_w : 0;
+  yv12->alpha_height = yv12->alpha_buffer ? img->d_h : 0;
+
+  yv12->y_stride = img->stride[VPX_PLANE_Y];
+  yv12->uv_stride = img->stride[VPX_PLANE_U];
+  yv12->alpha_stride = yv12->alpha_buffer ? img->stride[VPX_PLANE_ALPHA] : 0;
+
+  yv12->border  = (img->stride[VPX_PLANE_Y] - img->w) / 2;
+  yv12->clrtype = REG_YUV;
+
+  return VPX_CODEC_OK;
+}
+
 #endif  // VP9_VP9_IFACE_COMMON_H_
diff --git a/vpx_scale/generic/yv12config.c b/vpx_scale/generic/yv12config.c
index cd66f0051..99e3543ac 100644
--- a/vpx_scale/generic/yv12config.c
+++ b/vpx_scale/generic/yv12config.c
@@ -76,12 +76,17 @@ int vp8_yv12_realloc_frame_buffer(YV12_BUFFER_CONFIG *ybf,
     ybf->uv_height = uv_height;
     ybf->uv_stride = uv_stride;
 
+    ybf->alpha_width = 0;
+    ybf->alpha_height = 0;
+    ybf->alpha_stride = 0;
+
     ybf->border = border;
     ybf->frame_size = frame_size;
 
     ybf->y_buffer = ybf->buffer_alloc + (border * y_stride) + border;
     ybf->u_buffer = ybf->buffer_alloc + yplane_size + (border / 2  * uv_stride) + border / 2;
     ybf->v_buffer = ybf->buffer_alloc + yplane_size + uvplane_size + (border / 2  * uv_stride) + border / 2;
+    ybf->alpha_buffer = NULL;
 
     ybf->corrupted = 0; /* assume not currupted by errors */
     return 0;
diff --git a/vpx_scale/yv12config.h b/vpx_scale/yv12config.h
index 85396c00e..7b8bd850f 100644
--- a/vpx_scale/yv12config.h
+++ b/vpx_scale/yv12config.h
@@ -52,9 +52,14 @@ extern "C" {
     int   uv_stride;
     /*    int   uvinternal_width; */
 
+    int   alpha_width;
+    int   alpha_height;
+    int   alpha_stride;
+
     uint8_t *y_buffer;
     uint8_t *u_buffer;
     uint8_t *v_buffer;
+    uint8_t *alpha_buffer;
 
     uint8_t *buffer_alloc;
     int buffer_alloc_sz;