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LibVideo: Add MotionVector lookup tables as constant expressions

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This changes MotionVector by removing the cpp file and moving all
functions to the header, where they are now declared as constexpr
so that they can be compile-time evaluated in LookupTables.h.
This commit is contained in:
Zaggy1024 2022-10-08 22:50:35 -05:00 • committed by Andrew Kaster
parent 1dc4652683
commit 6c648329c4
5 changed files with 87 additions and 44 deletions
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42
Userland/Libraries/LibVideo/VP9/LookupTables.h
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Hunter Salyer <thefalsehonesty@gmail.com>
* Copyright (c) 2022, Gregory Bertilson <zaggy1024@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -7,6 +8,7 @@
#pragma once
#include "Enums.h"
#include "MotionVector.h"
#include "Symbols.h"
namespace Video::VP9 {
@ -289,4 +291,44 @@ static constexpr u8 cat_probs[7][14] = {
{ 254, 254, 254, 252, 249, 243, 230, 196, 177, 153, 140, 133, 130, 129 }
};
static constexpr MotionVector mv_ref_blocks[BLOCK_SIZES][MVREF_NEIGHBOURS] = {
{ { -1, 0 }, { 0, -1 }, { -1, -1 }, { -2, 0 }, { 0, -2 }, { -2, -1 }, { -1, -2 }, { -2, -2 } },
{ { -1, 0 }, { 0, -1 }, { -1, -1 }, { -2, 0 }, { 0, -2 }, { -2, -1 }, { -1, -2 }, { -2, -2 } },
{ { -1, 0 }, { 0, -1 }, { -1, -1 }, { -2, 0 }, { 0, -2 }, { -2, -1 }, { -1, -2 }, { -2, -2 } },
{ { -1, 0 }, { 0, -1 }, { -1, -1 }, { -2, 0 }, { 0, -2 }, { -2, -1 }, { -1, -2 }, { -2, -2 } },
{ { 0, -1 }, { -1, 0 }, { 1, -1 }, { -1, -1 }, { 0, -2 }, { -2, 0 }, { -2, -1 }, { -1, -2 } },
{ { -1, 0 }, { 0, -1 }, { -1, 1 }, { -1, -1 }, { -2, 0 }, { 0, -2 }, { -1, -2 }, { -2, -1 } },
{ { -1, 0 }, { 0, -1 }, { -1, 1 }, { 1, -1 }, { -1, -1 }, { -3, 0 }, { 0, -3 }, { -3, -3 } },
{ { 0, -1 }, { -1, 0 }, { 2, -1 }, { -1, -1 }, { -1, 1 }, { 0, -3 }, { -3, 0 }, { -3, -3 } },
{ { -1, 0 }, { 0, -1 }, { -1, 2 }, { -1, -1 }, { 1, -1 }, { -3, 0 }, { 0, -3 }, { -3, -3 } },
{ { -1, 1 }, { 1, -1 }, { -1, 2 }, { 2, -1 }, { -1, -1 }, { -3, 0 }, { 0, -3 }, { -3, -3 } },
{ { 0, -1 }, { -1, 0 }, { 4, -1 }, { -1, 2 }, { -1, -1 }, { 0, -3 }, { -3, 0 }, { 2, -1 } },
{ { -1, 0 }, { 0, -1 }, { -1, 4 }, { 2, -1 }, { -1, -1 }, { -3, 0 }, { 0, -3 }, { -1, 2 } },
{ { -1, 3 }, { 3, -1 }, { -1, 4 }, { 4, -1 }, { -1, -1 }, { -1, 0 }, { 0, -1 }, { -1, 6 } }
};
static constexpr u8 mode_2_counter[MB_MODE_COUNT] = { 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 0, 0, 3, 1 };
static constexpr u8 counter_to_context[19] = {
BOTH_PREDICTED,
NEW_PLUS_NON_INTRA,
BOTH_NEW,
ZERO_PLUS_PREDICTED,
NEW_PLUS_NON_INTRA,
INVALID_CASE,
BOTH_ZERO,
INVALID_CASE,
INVALID_CASE,
INTRA_PLUS_NON_INTRA,
INTRA_PLUS_NON_INTRA,
INVALID_CASE,
INTRA_PLUS_NON_INTRA,
INVALID_CASE,
INVALID_CASE,
INVALID_CASE,
INVALID_CASE,
INVALID_CASE,
BOTH_INTRA
};
}