filter.c 12.2 KB
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/*
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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
 * 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.
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 */

#include <assert.h>

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#include "av1/common/filter.h"
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DECLARE_ALIGNED(256, static const InterpKernel,
                bilinear_filters[SUBPEL_SHIFTS]) = {
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  { 0, 0, 0, 128, 0, 0, 0, 0 },  { 0, 0, 0, 120, 8, 0, 0, 0 },
  { 0, 0, 0, 112, 16, 0, 0, 0 }, { 0, 0, 0, 104, 24, 0, 0, 0 },
  { 0, 0, 0, 96, 32, 0, 0, 0 },  { 0, 0, 0, 88, 40, 0, 0, 0 },
  { 0, 0, 0, 80, 48, 0, 0, 0 },  { 0, 0, 0, 72, 56, 0, 0, 0 },
  { 0, 0, 0, 64, 64, 0, 0, 0 },  { 0, 0, 0, 56, 72, 0, 0, 0 },
  { 0, 0, 0, 48, 80, 0, 0, 0 },  { 0, 0, 0, 40, 88, 0, 0, 0 },
  { 0, 0, 0, 32, 96, 0, 0, 0 },  { 0, 0, 0, 24, 104, 0, 0, 0 },
  { 0, 0, 0, 16, 112, 0, 0, 0 }, { 0, 0, 0, 8, 120, 0, 0, 0 }
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};

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#if USE_TEMPORALFILTER_12TAP
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DECLARE_ALIGNED(16, static const int16_t,
                sub_pel_filters_temporalfilter_12[SUBPEL_SHIFTS][12]) = {
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  // intfilt 0.8
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  { 0, 0, 0, 0, 0, 128, 0, 0, 0, 0, 0, 0 },
  { 0, 1, -1, 3, -7, 127, 8, -4, 2, -1, 0, 0 },
  { 0, 1, -3, 5, -12, 124, 18, -8, 4, -2, 1, 0 },
  { -1, 2, -4, 8, -17, 120, 28, -11, 6, -3, 1, -1 },
  { -1, 2, -4, 10, -21, 114, 38, -15, 8, -4, 2, -1 },
  { -1, 3, -5, 11, -23, 107, 49, -18, 9, -5, 2, -1 },
  { -1, 3, -6, 12, -25, 99, 60, -21, 11, -6, 3, -1 },
  { -1, 3, -6, 12, -25, 90, 70, -23, 12, -6, 3, -1 },
  { -1, 3, -6, 12, -24, 80, 80, -24, 12, -6, 3, -1 },
  { -1, 3, -6, 12, -23, 70, 90, -25, 12, -6, 3, -1 },
  { -1, 3, -6, 11, -21, 60, 99, -25, 12, -6, 3, -1 },
  { -1, 2, -5, 9, -18, 49, 107, -23, 11, -5, 3, -1 },
  { -1, 2, -4, 8, -15, 38, 114, -21, 10, -4, 2, -1 },
  { -1, 1, -3, 6, -11, 28, 120, -17, 8, -4, 2, -1 },
  { 0, 1, -2, 4, -8, 18, 124, -12, 5, -3, 1, 0 },
  { 0, 0, -1, 2, -4, 8, 127, -7, 3, -1, 1, 0 },
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};
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#endif  // USE_TEMPORALFILTER_12TAP
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#if CONFIG_DUAL_FILTER
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DECLARE_ALIGNED(256, static const InterpKernel,
                sub_pel_filters_8[SUBPEL_SHIFTS]) = {
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  // intfilt 0.575
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  { 0, 0, 0, 128, 0, 0, 0, 0 },        { 0, 1, -5, 126, 8, -3, 1, 0 },
  { -1, 3, -10, 123, 18, -6, 2, -1 },  { -1, 4, -14, 118, 27, -9, 3, 0 },
  { -1, 5, -16, 112, 37, -12, 4, -1 }, { -1, 5, -18, 105, 48, -14, 4, -1 },
  { -1, 6, -19, 97, 58, -17, 5, -1 },  { -1, 6, -20, 88, 68, -18, 6, -1 },
  { -1, 6, -19, 78, 78, -19, 6, -1 },  { -1, 6, -18, 68, 88, -20, 6, -1 },
  { -1, 5, -17, 58, 97, -19, 6, -1 },  { -1, 4, -14, 48, 105, -18, 5, -1 },
  { -1, 4, -12, 37, 112, -16, 5, -1 }, { 0, 3, -9, 27, 118, -14, 4, -1 },
  { -1, 2, -6, 18, 123, -10, 3, -1 },  { 0, 1, -3, 8, 126, -5, 1, 0 },
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};

DECLARE_ALIGNED(256, static const InterpKernel,
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                sub_pel_filters_8sharp[SUBPEL_SHIFTS]) = {
  // intfilt 0.8
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  { 0, 0, 0, 128, 0, 0, 0, 0 },         { -1, 2, -6, 127, 9, -4, 2, -1 },
  { -2, 5, -12, 124, 18, -7, 4, -2 },   { -2, 7, -16, 119, 28, -11, 5, -2 },
  { -3, 8, -19, 114, 38, -14, 7, -3 },  { -3, 9, -22, 107, 49, -17, 8, -3 },
  { -4, 10, -23, 99, 60, -20, 10, -4 }, { -4, 11, -23, 90, 70, -22, 10, -4 },
  { -4, 11, -23, 80, 80, -23, 11, -4 }, { -4, 10, -22, 70, 90, -23, 11, -4 },
  { -4, 10, -20, 60, 99, -23, 10, -4 }, { -3, 8, -17, 49, 107, -22, 9, -3 },
  { -3, 7, -14, 38, 114, -19, 8, -3 },  { -2, 5, -11, 28, 119, -16, 7, -2 },
  { -2, 4, -7, 18, 124, -12, 5, -2 },   { -1, 2, -4, 9, 127, -6, 2, -1 },
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};
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DECLARE_ALIGNED(256, static const int16_t,
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                sub_pel_filters_12sharp[SUBPEL_SHIFTS][12]) = {
  // intfilt 0.8
  { 0, 0, 0, 0, 0, 128, 0, 0, 0, 0, 0, 0 },
  { 0, 1, -1, 3, -7, 127, 8, -4, 2, -1, 0, 0 },
  { 0, 1, -3, 5, -12, 124, 18, -8, 4, -2, 1, 0 },
  { -1, 2, -4, 8, -17, 120, 28, -11, 6, -3, 1, -1 },
  { -1, 2, -4, 10, -21, 114, 38, -15, 8, -4, 2, -1 },
  { -1, 3, -5, 11, -23, 107, 49, -18, 9, -5, 2, -1 },
  { -1, 3, -6, 12, -25, 99, 60, -21, 11, -6, 3, -1 },
  { -1, 3, -6, 12, -25, 90, 70, -23, 12, -6, 3, -1 },
  { -1, 3, -6, 12, -24, 80, 80, -24, 12, -6, 3, -1 },
  { -1, 3, -6, 12, -23, 70, 90, -25, 12, -6, 3, -1 },
  { -1, 3, -6, 11, -21, 60, 99, -25, 12, -6, 3, -1 },
  { -1, 2, -5, 9, -18, 49, 107, -23, 11, -5, 3, -1 },
  { -1, 2, -4, 8, -15, 38, 114, -21, 10, -4, 2, -1 },
  { -1, 1, -3, 6, -11, 28, 120, -17, 8, -4, 2, -1 },
  { 0, 1, -2, 4, -8, 18, 124, -12, 5, -3, 1, 0 },
  { 0, 0, -1, 2, -4, 8, 127, -7, 3, -1, 1, 0 },
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};
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DECLARE_ALIGNED(256, static const InterpKernel,
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                sub_pel_filters_8smooth2[SUBPEL_SHIFTS]) = {
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  // freqmultiplier = 0.2
  { 0, 0, 0, 128, 0, 0, 0, 0 },   { 0, 9, 30, 44, 32, 11, 2, 0 },
  { 0, 8, 28, 44, 34, 12, 2, 0 }, { 0, 7, 27, 44, 35, 13, 2, 0 },
  { 0, 6, 26, 43, 37, 14, 2, 0 }, { 0, 5, 24, 43, 38, 16, 2, 0 },
  { 0, 5, 23, 42, 38, 17, 3, 0 }, { 0, 4, 21, 41, 40, 19, 3, 0 },
  { 0, 4, 20, 40, 40, 20, 4, 0 }, { 0, 3, 19, 40, 41, 21, 4, 0 },
  { 0, 3, 17, 38, 42, 23, 5, 0 }, { 0, 2, 16, 38, 43, 24, 5, 0 },
  { 0, 2, 14, 37, 43, 26, 6, 0 }, { 0, 2, 13, 35, 44, 27, 7, 0 },
  { 0, 2, 12, 34, 44, 28, 8, 0 }, { 0, 2, 11, 32, 44, 30, 9, 0 },
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};

DECLARE_ALIGNED(256, static const InterpKernel,
                sub_pel_filters_8smooth[SUBPEL_SHIFTS]) = {
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  // freqmultiplier = 0.8
  { 0, 0, 0, 128, 0, 0, 0, 0 },    { 0, -5, 13, 102, 24, -7, 1, 0 },
  { 0, -4, 8, 100, 31, -8, 1, 0 }, { 0, -3, 4, 97, 37, -8, 1, 0 },
  { 0, -2, 0, 94, 44, -9, 1, 0 },  { 0, -2, -3, 90, 51, -9, 1, 0 },
  { 0, -1, -5, 84, 59, -9, 0, 0 }, { 0, 0, -7, 79, 65, -9, 0, 0 },
  { 0, 0, -8, 72, 72, -8, 0, 0 },  { 0, 0, -9, 65, 79, -7, 0, 0 },
  { 0, 0, -9, 59, 84, -5, -1, 0 }, { 0, 1, -9, 51, 90, -3, -2, 0 },
  { 0, 1, -9, 44, 94, 0, -2, 0 },  { 0, 1, -8, 37, 97, 4, -3, 0 },
  { 0, 1, -8, 31, 100, 8, -4, 0 }, { 0, 1, -7, 24, 102, 13, -5, 0 },
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};
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#else  // CONFIG_DUAL_FILTER
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DECLARE_ALIGNED(256, static const InterpKernel,
                sub_pel_filters_8[SUBPEL_SHIFTS]) = {
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#if CONFIG_FILTER_7BIT
  { 0, 0, 0, 128, 0, 0, 0, 0 },      { 0, 2, -6, 126, 8, -2, 0, 0 },
  { 0, 2, -10, 122, 18, -4, 0, 0 },  { 0, 2, -12, 116, 28, -8, 2, 0 },
  { 0, 2, -14, 110, 38, -10, 2, 0 }, { 0, 2, -14, 102, 48, -12, 2, 0 },
  { 0, 2, -16, 94, 58, -12, 2, 0 },  { 0, 2, -14, 84, 66, -12, 2, 0 },
  { 0, 2, -14, 76, 76, -14, 2, 0 },  { 0, 2, -12, 66, 84, -14, 2, 0 },
  { 0, 2, -12, 58, 94, -16, 2, 0 },  { 0, 2, -12, 48, 102, -14, 2, 0 },
  { 0, 2, -10, 38, 110, -14, 2, 0 }, { 0, 2, -8, 28, 116, -12, 2, 0 },
  { 0, 0, -4, 18, 122, -10, 2, 0 },  { 0, 0, -2, 8, 126, -6, 2, 0 }
#else
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  { 0, 0, 0, 128, 0, 0, 0, 0 },        { 0, 1, -5, 126, 8, -3, 1, 0 },
  { -1, 3, -10, 122, 18, -6, 2, 0 },   { -1, 4, -13, 118, 27, -9, 3, -1 },
  { -1, 4, -16, 112, 37, -11, 4, -1 }, { -1, 5, -18, 105, 48, -14, 4, -1 },
  { -1, 5, -19, 97, 58, -16, 5, -1 },  { -1, 6, -19, 88, 68, -18, 5, -1 },
  { -1, 6, -19, 78, 78, -19, 6, -1 },  { -1, 5, -18, 68, 88, -19, 6, -1 },
  { -1, 5, -16, 58, 97, -19, 5, -1 },  { -1, 4, -14, 48, 105, -18, 5, -1 },
  { -1, 4, -11, 37, 112, -16, 4, -1 }, { -1, 3, -9, 27, 118, -13, 4, -1 },
  { 0, 2, -6, 18, 122, -10, 3, -1 },   { 0, 1, -3, 8, 126, -5, 1, 0 }
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#endif
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};

DECLARE_ALIGNED(256, static const InterpKernel,
                sub_pel_filters_8sharp[SUBPEL_SHIFTS]) = {
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#if CONFIG_FILTER_7BIT
  { 0, 0, 0, 128, 0, 0, 0, 0 },         { -2, 2, -6, 126, 8, -2, 2, 0 },
  { -2, 6, -12, 124, 16, -6, 4, -2 },   { -2, 8, -18, 120, 26, -10, 6, -2 },
  { -4, 10, -22, 116, 38, -14, 6, -2 }, { -4, 10, -22, 108, 48, -18, 8, -2 },
  { -4, 10, -24, 100, 60, -20, 8, -2 }, { -4, 10, -24, 90, 70, -22, 10, -2 },
  { -4, 12, -24, 80, 80, -24, 12, -4 }, { -2, 10, -22, 70, 90, -24, 10, -4 },
  { -2, 8, -20, 60, 100, -24, 10, -4 }, { -2, 8, -18, 48, 108, -22, 10, -4 },
  { -2, 6, -14, 38, 116, -22, 10, -4 }, { -2, 6, -10, 26, 120, -18, 8, -2 },
  { -2, 4, -6, 16, 124, -12, 6, -2 },   { 0, 2, -2, 8, 126, -6, 2, -2 }
#else
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  { 0, 0, 0, 128, 0, 0, 0, 0 },         { -1, 3, -7, 127, 8, -3, 1, 0 },
  { -2, 5, -13, 125, 17, -6, 3, -1 },   { -3, 7, -17, 121, 27, -10, 5, -2 },
  { -4, 9, -20, 115, 37, -13, 6, -2 },  { -4, 10, -23, 108, 48, -16, 8, -3 },
  { -4, 10, -24, 100, 59, -19, 9, -3 }, { -4, 11, -24, 90, 70, -21, 10, -4 },
  { -4, 11, -23, 80, 80, -23, 11, -4 }, { -4, 10, -21, 70, 90, -24, 11, -4 },
  { -3, 9, -19, 59, 100, -24, 10, -4 }, { -3, 8, -16, 48, 108, -23, 10, -4 },
  { -2, 6, -13, 37, 115, -20, 9, -4 },  { -2, 5, -10, 27, 121, -17, 7, -3 },
  { -1, 3, -6, 17, 125, -13, 5, -2 },   { 0, 1, -3, 8, 127, -7, 3, -1 }
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#endif
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};
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DECLARE_ALIGNED(256, static const InterpKernel,
                sub_pel_filters_8smooth[SUBPEL_SHIFTS]) = {
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#if CONFIG_FILTER_7BIT
  { 0, 0, 0, 128, 0, 0, 0, 0 },     { 0, 2, 28, 62, 34, 2, 0, 0 },
  { 0, 0, 26, 62, 36, 4, 0, 0 },    { 0, 0, 22, 62, 40, 4, 0, 0 },
  { 0, 0, 20, 60, 42, 6, 0, 0 },    { 0, 0, 18, 58, 44, 8, 0, 0 },
  { 0, 0, 16, 56, 46, 10, 0, 0 },   { 0, -2, 16, 54, 48, 12, 0, 0 },
  { 0, -2, 14, 52, 52, 14, -2, 0 }, { 0, 0, 12, 48, 54, 16, -2, 0 },
  { 0, 0, 10, 46, 56, 16, 0, 0 },   { 0, 0, 8, 44, 58, 18, 0, 0 },
  { 0, 0, 6, 42, 60, 20, 0, 0 },    { 0, 0, 4, 40, 62, 22, 0, 0 },
  { 0, 0, 4, 36, 62, 26, 0, 0 },    { 0, 0, 2, 34, 62, 28, 2, 0 }
#else
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  { 0, 0, 0, 128, 0, 0, 0, 0 },       { -3, -1, 32, 64, 38, 1, -3, 0 },
  { -2, -2, 29, 63, 41, 2, -3, 0 },   { -2, -2, 26, 63, 43, 4, -4, 0 },
  { -2, -3, 24, 62, 46, 5, -4, 0 },   { -2, -3, 21, 60, 49, 7, -4, 0 },
  { -1, -4, 18, 59, 51, 9, -4, 0 },   { -1, -4, 16, 57, 53, 12, -4, -1 },
  { -1, -4, 14, 55, 55, 14, -4, -1 }, { -1, -4, 12, 53, 57, 16, -4, -1 },
  { 0, -4, 9, 51, 59, 18, -4, -1 },   { 0, -4, 7, 49, 60, 21, -3, -2 },
  { 0, -4, 5, 46, 62, 24, -3, -2 },   { 0, -4, 4, 43, 63, 26, -2, -2 },
  { 0, -3, 2, 41, 63, 29, -2, -2 },   { 0, -3, 1, 38, 64, 32, -1, -3 }
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#endif
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};
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#endif  // CONFIG_DUAL_FILTER
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#if CONFIG_EXT_INTRA
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#if CONFIG_INTRA_INTERP
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const InterpKernel *av1_intra_filter_kernels[INTRA_FILTERS] = {
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  bilinear_filters,         // INTRA_FILTER_LINEAR
  sub_pel_filters_8,        // INTRA_FILTER_8TAP
  sub_pel_filters_8sharp,   // INTRA_FILTER_8TAP_SHARP
  sub_pel_filters_8smooth,  // INTRA_FILTER_8TAP_SMOOTH
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};
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#endif  // CONFIG_INTRA_INTERP
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#endif  // CONFIG_EXT_INTRA
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#if CONFIG_DUAL_FILTER
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static const InterpFilterParams
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    av1_interp_filter_params_list[SWITCHABLE_FILTERS + EXTRA_FILTERS] = {
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      { (const int16_t *)sub_pel_filters_8, SUBPEL_TAPS, SUBPEL_SHIFTS,
        EIGHTTAP_REGULAR },
      { (const int16_t *)sub_pel_filters_8smooth, SUBPEL_TAPS, SUBPEL_SHIFTS,
        EIGHTTAP_SMOOTH },
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      { (const int16_t *)sub_pel_filters_12sharp, 12, SUBPEL_SHIFTS,
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        MULTITAP_SHARP },
      { (const int16_t *)sub_pel_filters_8smooth2, SUBPEL_TAPS, SUBPEL_SHIFTS,
        EIGHTTAP_SMOOTH2 },
      { (const int16_t *)bilinear_filters, SUBPEL_TAPS, SUBPEL_SHIFTS,
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        BILINEAR },
      { (const int16_t *)sub_pel_filters_8sharp, SUBPEL_TAPS, SUBPEL_SHIFTS,
        EIGHTTAP_SHARP },
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    };
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#else
static const InterpFilterParams
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    av1_interp_filter_params_list[SWITCHABLE_FILTERS + 1] = {
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      { (const int16_t *)sub_pel_filters_8, SUBPEL_TAPS, SUBPEL_SHIFTS,
        EIGHTTAP_REGULAR },
      { (const int16_t *)sub_pel_filters_8smooth, SUBPEL_TAPS, SUBPEL_SHIFTS,
        EIGHTTAP_SMOOTH },
      { (const int16_t *)sub_pel_filters_8sharp, SUBPEL_TAPS, SUBPEL_SHIFTS,
        MULTITAP_SHARP },
      { (const int16_t *)bilinear_filters, SUBPEL_TAPS, SUBPEL_SHIFTS,
        BILINEAR }
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    };
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#endif  // CONFIG_DUAL_FILTER
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#if USE_TEMPORALFILTER_12TAP
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static const InterpFilterParams av1_interp_temporalfilter_12tap = {
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  (const int16_t *)sub_pel_filters_temporalfilter_12, 12, SUBPEL_SHIFTS,
  TEMPORALFILTER_12TAP
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};
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#endif  // USE_TEMPORALFILTER_12TAP
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InterpFilterParams av1_get_interp_filter_params(
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    const InterpFilter interp_filter) {
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#if USE_TEMPORALFILTER_12TAP
  if (interp_filter == TEMPORALFILTER_12TAP)
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    return av1_interp_temporalfilter_12tap;
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#endif  // USE_TEMPORALFILTER_12TAP
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  return av1_interp_filter_params_list[interp_filter];
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}
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const int16_t *av1_get_interp_filter_kernel(const InterpFilter interp_filter) {
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#if USE_TEMPORALFILTER_12TAP
  if (interp_filter == TEMPORALFILTER_12TAP)
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    return av1_interp_temporalfilter_12tap.filter_ptr;
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#endif  // USE_TEMPORALFILTER_12TAP
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  return (const int16_t *)av1_interp_filter_params_list[interp_filter]
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      .filter_ptr;
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}