9c01aa1b0c
This minimize code differences between AOM master and nextgenv2 Change-Id: If144865bdf3ef0818e7aac11018b9e786444c550
43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_DSP_BLEND_H_
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#define AOM_DSP_BLEND_H_
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#include "aom_ports/mem.h"
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// Various blending functions and macros.
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// See also the aom_blend_* functions in aom_dsp_rtcd.h
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// Alpha blending with alpha values from the range [0, 64], where 64
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// means use the first input and 0 means use the second input.
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#define AOM_BLEND_A64_ROUND_BITS 6
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#define AOM_BLEND_A64_MAX_ALPHA (1 << AOM_BLEND_A64_ROUND_BITS) // 64
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#define AOM_BLEND_A64(a, v0, v1) \
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ROUND_POWER_OF_TWO((a) * (v0) + (AOM_BLEND_A64_MAX_ALPHA - (a)) * (v1), \
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AOM_BLEND_A64_ROUND_BITS)
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// Alpha blending with alpha values from the range [0, 256], where 256
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// means use the first input and 0 means use the second input.
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#define AOM_BLEND_A256_ROUND_BITS 8
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#define AOM_BLEND_A256_MAX_ALPHA (1 << AOM_BLEND_A256_ROUND_BITS) // 256
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#define AOM_BLEND_A256(a, v0, v1) \
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ROUND_POWER_OF_TWO((a) * (v0) + (AOM_BLEND_A256_MAX_ALPHA - (a)) * (v1), \
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AOM_BLEND_A256_ROUND_BITS)
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// Blending by averaging.
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#define AOM_BLEND_AVG(v0, v1) ROUND_POWER_OF_TWO((v0) + (v1), 1)
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#endif // AOM_DSP_BLEND_H_
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