Port folder renaming changes from AOM
Manually cherry-picked commits:
ceef058 libvpx->libaom part2
3d26d91 libvpx -> libaom
cfea7dd vp10/ -> av1/
3a8eff7 Fix a build issue for a test
bf4202e Rename vpx to aom
Change-Id: I1b0eb5a40796e3aaf41c58984b4229a439a597dc
diff --git a/aom_dsp/blend.h b/aom_dsp/blend.h
new file mode 100644
index 0000000..e43149d
--- /dev/null
+++ b/aom_dsp/blend.h
@@ -0,0 +1,40 @@
+/*
+* Copyright (c) 2016 The WebM project authors. All Rights Reserved.
+*
+* Use of this source code is governed by a BSD-style license
+* that can be found in the LICENSE file in the root of the source
+* tree. An additional intellectual property rights grant can be found
+* in the file PATENTS. All contributing project authors may
+* be found in the AUTHORS file in the root of the source tree.
+*/
+
+#ifndef VPX_DSP_BLEND_H_
+#define VPX_DSP_BLEND_H_
+
+#include "aom_ports/mem.h"
+
+// Various blending functions and macros.
+// See also the vpx_blend_* functions in vpx_dsp_rtcd.h
+
+// Alpha blending with alpha values from the range [0, 64], where 64
+// means use the first input and 0 means use the second input.
+#define VPX_BLEND_A64_ROUND_BITS 6
+#define VPX_BLEND_A64_MAX_ALPHA (1 << VPX_BLEND_A64_ROUND_BITS) // 64
+
+#define VPX_BLEND_A64(a, v0, v1) \
+ ROUND_POWER_OF_TWO((a) * (v0) + (VPX_BLEND_A64_MAX_ALPHA - (a)) * (v1), \
+ VPX_BLEND_A64_ROUND_BITS)
+
+// Alpha blending with alpha values from the range [0, 256], where 256
+// means use the first input and 0 means use the second input.
+#define VPX_BLEND_A256_ROUND_BITS 8
+#define VPX_BLEND_A256_MAX_ALPHA (1 << VPX_BLEND_A256_ROUND_BITS) // 256
+
+#define VPX_BLEND_A256(a, v0, v1) \
+ ROUND_POWER_OF_TWO((a) * (v0) + (VPX_BLEND_A256_MAX_ALPHA - (a)) * (v1), \
+ VPX_BLEND_A256_ROUND_BITS)
+
+// Blending by averaging.
+#define VPX_BLEND_AVG(v0, v1) ROUND_POWER_OF_TWO((v0) + (v1), 1)
+
+#endif // VPX_DSP_BLEND_H_
