mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-12 21:05:36 +00:00
4ccc506a5c
This is the reference implementation for the Alliance for Open Media's av1 video code. The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36. MozReview-Commit-ID: 5PFTLbBDRrb --HG-- extra : rebase_source : a51578e072e47ac03b422d10d9b279a3de5fc216
43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
/*
|
|
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
|
|
*
|
|
* This source code is subject to the terms of the BSD 2 Clause License and
|
|
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
|
|
* was not distributed with this source code in the LICENSE file, you can
|
|
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
|
|
* Media Patent License 1.0 was not distributed with this source code in the
|
|
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
|
|
*/
|
|
|
|
#ifndef AOM_DSP_BLEND_H_
|
|
#define AOM_DSP_BLEND_H_
|
|
|
|
#include "aom_ports/mem.h"
|
|
|
|
// Various blending functions and macros.
|
|
// See also the aom_blend_* functions in aom_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 AOM_BLEND_A64_ROUND_BITS 6
|
|
#define AOM_BLEND_A64_MAX_ALPHA (1 << AOM_BLEND_A64_ROUND_BITS) // 64
|
|
|
|
#define AOM_BLEND_A64(a, v0, v1) \
|
|
ROUND_POWER_OF_TWO((a) * (v0) + (AOM_BLEND_A64_MAX_ALPHA - (a)) * (v1), \
|
|
AOM_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 AOM_BLEND_A256_ROUND_BITS 8
|
|
#define AOM_BLEND_A256_MAX_ALPHA (1 << AOM_BLEND_A256_ROUND_BITS) // 256
|
|
|
|
#define AOM_BLEND_A256(a, v0, v1) \
|
|
ROUND_POWER_OF_TWO((a) * (v0) + (AOM_BLEND_A256_MAX_ALPHA - (a)) * (v1), \
|
|
AOM_BLEND_A256_ROUND_BITS)
|
|
|
|
// Blending by averaging.
|
|
#define AOM_BLEND_AVG(v0, v1) ROUND_POWER_OF_TWO((v0) + (v1), 1)
|
|
|
|
#endif // AOM_DSP_BLEND_H_
|