mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-06-15 23:01:52 +00:00
fbc53c1ec3
...and keep a forwarding header around in VP9, so we don't have to update all references to the class there. In time, we probably want to merge LibGfx/ImageDecoders and LibVideo into LibMedia, but for now I need just this class for the lossy webp decoder. So move just it over. No behvior change.
40 lines
972 B
C++
40 lines
972 B
C++
/*
|
|
* Copyright (c) 2021, Hunter Salyer <thefalsehonesty@gmail.com>
|
|
* Copyright (c) 2022, Gregory Bertilson <zaggy1024@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/BitStream.h>
|
|
#include <AK/Error.h>
|
|
#include <AK/Optional.h>
|
|
#include <AK/Types.h>
|
|
|
|
namespace Gfx {
|
|
|
|
class BooleanDecoder {
|
|
public:
|
|
/* (9.2) */
|
|
static ErrorOr<BooleanDecoder> initialize(MaybeOwned<BigEndianInputBitStream> bit_stream, size_t size_in_bytes);
|
|
ErrorOr<bool> read_bool(u8 probability);
|
|
ErrorOr<u8> read_literal(u8 bits);
|
|
ErrorOr<void> finish_decode();
|
|
|
|
private:
|
|
BooleanDecoder(MaybeOwned<BigEndianInputBitStream>&& bit_stream, u8 value, u8 range, u64 bits_left)
|
|
: m_bit_stream(move(bit_stream))
|
|
, m_value(value)
|
|
, m_range(range)
|
|
, m_bits_left(bits_left)
|
|
{
|
|
}
|
|
|
|
MaybeOwned<BigEndianInputBitStream> m_bit_stream;
|
|
u8 m_value { 0 };
|
|
u8 m_range { 0 };
|
|
u64 m_bits_left { 0 };
|
|
};
|
|
|
|
}
|