4d0ec7aacd
Add a function clip_pixel() to clip a pixel value to the [0,255] range
of allowed values, and use this where-ever appropriate (e.g. prediction,
reconstruction). Likewise, consistently use the recently added function
clip_prob(), which calculates a binary probability in the [1,255] range.
If possible, try to use get_prob() or its sister get_binary_prob() to
calculate binary probabilities, for consistency.
Since in some places, this means that binary probability calculations
are changed (we use {255,256}*count0/(total) in a range of places,
and all of these are now changed to use 256*count0+(total>>1)/total),
this changes the encoding result, so this patch warrants some extensive
testing.
Change-Id: Ibeeff8d886496839b8e0c0ace9ccc552351f7628
46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VP9_COMMON_VP9_COMMON_H_
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#define VP9_COMMON_VP9_COMMON_H_
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#include <assert.h>
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#include "vpx_config.h"
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/* Interface header for common constant data structures and lookup tables */
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#include "vpx_mem/vpx_mem.h"
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#include "vpx/vpx_integer.h"
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#include "vp9/common/vp9_common_types.h"
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/* Only need this for fixed-size arrays, for structs just assign. */
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#define vp9_copy( Dest, Src) { \
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assert( sizeof( Dest) == sizeof( Src)); \
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vpx_memcpy( Dest, Src, sizeof( Src)); \
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}
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/* Use this for variably-sized arrays. */
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#define vp9_copy_array( Dest, Src, N) { \
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assert( sizeof( *Dest) == sizeof( *Src)); \
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vpx_memcpy( Dest, Src, N * sizeof( *Src)); \
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}
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#define vp9_zero( Dest) vpx_memset( &Dest, 0, sizeof( Dest));
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#define vp9_zero_array( Dest, N) vpx_memset( Dest, 0, N * sizeof( *Dest));
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static __inline uint8_t clip_pixel(int val) {
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return (val > 255) ? 255u : (val < 0) ? 0u : val;
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}
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#endif /* common_h */
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