libvpx: Pull from upstream

source/libvpx/vp9/vp9_iface_common.h

Index: source/libvpx/vp9/vp9_iface_common.h
===================================================================
--- source/libvpx/vp9/vp9_iface_common.h	(revision 292608)
+++ source/libvpx/vp9/vp9_iface_common.h	(working copy)
@@ -16,11 +16,9 @@
     * the Y, U, and V planes, nor other alignment adjustments that
     * might be representable by a YV12_BUFFER_CONFIG, so we just
     * initialize all the fields.*/
-  const int ss_x = yv12->uv_crop_width < yv12->y_crop_width;
-  const int ss_y = yv12->uv_crop_height < yv12->y_crop_height;
   int bps;
-  if (!ss_y) {
-    if (!ss_x) {
+  if (!yv12->subsampling_y) {
+    if (!yv12->subsampling_x) {
       img->fmt = VPX_IMG_FMT_I444;
       bps = 24;
     } else {
@@ -28,8 +26,13 @@
       bps = 16;
     }
   } else {
-    img->fmt = VPX_IMG_FMT_I420;
-    bps = 12;
+    if (!yv12->subsampling_x) {
+      img->fmt = VPX_IMG_FMT_I440;
+      bps = 16;
+    } else {
+      img->fmt = VPX_IMG_FMT_I420;
+      bps = 12;
+    }
   }
   img->bit_depth = 8;
   img->w = yv12->y_stride;
@@ -36,8 +39,8 @@
   img->h = ALIGN_POWER_OF_TWO(yv12->y_height + 2 * VP9_ENC_BORDER_IN_PIXELS, 3);
   img->d_w = yv12->y_crop_width;
   img->d_h = yv12->y_crop_height;
-  img->x_chroma_shift = ss_x;
-  img->y_chroma_shift = ss_y;
+  img->x_chroma_shift = yv12->subsampling_x;
+  img->y_chroma_shift = yv12->subsampling_y;
   img->planes[VPX_PLANE_Y] = yv12->y_buffer;
   img->planes[VPX_PLANE_U] = yv12->u_buffer;
   img->planes[VPX_PLANE_V] = yv12->v_buffer;
@@ -46,6 +49,22 @@
   img->stride[VPX_PLANE_U] = yv12->uv_stride;
   img->stride[VPX_PLANE_V] = yv12->uv_stride;
   img->stride[VPX_PLANE_ALPHA] = yv12->y_stride;
+#if CONFIG_VP9_HIGHBITDEPTH
+  if (yv12->flags & YV12_FLAG_HIGHBITDEPTH) {
+    // vpx_image_t uses byte strides and a pointer to the first byte
+    // of the image.
+    img->fmt |= VPX_IMG_FMT_HIGHBITDEPTH;
+    img->bit_depth = yv12->bit_depth;
+    img->planes[VPX_PLANE_Y] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->y_buffer);
+    img->planes[VPX_PLANE_U] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->u_buffer);
+    img->planes[VPX_PLANE_V] = (uint8_t*)CONVERT_TO_SHORTPTR(yv12->v_buffer);
+    img->planes[VPX_PLANE_ALPHA] = NULL;
+    img->stride[VPX_PLANE_Y] = 2 * yv12->y_stride;
+    img->stride[VPX_PLANE_U] = 2 * yv12->uv_stride;
+    img->stride[VPX_PLANE_V] = 2 * yv12->uv_stride;
+    img->stride[VPX_PLANE_ALPHA] = 2 * yv12->y_stride;
+  }
+#endif  // CONFIG_VP9_HIGHBITDEPTH
   img->bps = bps;
   img->user_priv = user_priv;
   img->img_data = yv12->buffer_alloc;
@@ -68,11 +87,39 @@
                                             : yv12->y_width;
   yv12->uv_height = img->y_chroma_shift == 1 ? (1 + yv12->y_height) / 2
                                              : yv12->y_height;
+  yv12->uv_crop_width = yv12->uv_width;
+  yv12->uv_crop_height = yv12->uv_height;
 
   yv12->y_stride = img->stride[VPX_PLANE_Y];
   yv12->uv_stride = img->stride[VPX_PLANE_U];
 
+#if CONFIG_VP9_HIGHBITDEPTH
+  if (img->fmt & VPX_IMG_FMT_HIGHBITDEPTH) {
+    // In vpx_image_t
+    //     planes point to uint8 address of start of data
+    //     stride counts uint8s to reach next row
+    // In YV12_BUFFER_CONFIG
+    //     y_buffer, u_buffer, v_buffer point to uint16 address of data
+    //     stride and border counts in uint16s
+    // This means that all the address calculations in the main body of code
+    // should work correctly.
+    // However, before we do any pixel operations we need to cast the address
+    // to a uint16 ponter and double its value.
+    yv12->y_buffer = CONVERT_TO_BYTEPTR(yv12->y_buffer);
+    yv12->u_buffer = CONVERT_TO_BYTEPTR(yv12->u_buffer);
+    yv12->v_buffer = CONVERT_TO_BYTEPTR(yv12->v_buffer);
+    yv12->y_stride >>= 1;
+    yv12->uv_stride >>= 1;
+    yv12->flags = YV12_FLAG_HIGHBITDEPTH;
+  } else {
+    yv12->flags = 0;
+  }
+  yv12->border  = (yv12->y_stride - img->w) / 2;
+#else
   yv12->border  = (img->stride[VPX_PLANE_Y] - img->w) / 2;
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+  yv12->subsampling_x = img->x_chroma_shift;
+  yv12->subsampling_y = img->y_chroma_shift;
   return VPX_CODEC_OK;
 }