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LibVideo/VP9: Specify which spec section defines certain behaviors

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This commit is contained in:
FalseHonesty 2021-06-26 13:31:34 -04:00 • committed by Andreas Kling
parent ce524214c9
commit 91572a49c4
6 changed files with 51 additions and 36 deletions
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62
Userland/Libraries/LibVideo/VP9/BitStream.cpp
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@ -37,13 +37,6 @@ u8 BitStream::read_f(size_t n)
return result;
}
i8 BitStream::read_s(size_t n)
{
auto value = read_f(n);
auto sign = read_bit();
return sign ? -value : value;
}
u8 BitStream::read_f8()
{
if (!m_current_byte.has_value())
@ -63,30 +56,6 @@ u16 BitStream::read_f16()
return (read_f8() << 8u) | read_f8();
}
u8 BitStream::read_literal(size_t n)
{
u8 return_value = 0;
for (size_t i = 0; i < n; i++) {
return_value = (2 * return_value) + read_bool(128);
}
return return_value;
}
u64 BitStream::get_position()
{
return (m_bytes_read * 8) + (7 - m_current_bit_position);
}
size_t BitStream::bytes_remaining()
{
return m_bytes_remaining;
}
size_t BitStream::bits_remaining()
{
return (bytes_remaining() * 8) + m_current_bit_position + 1;
}
/* 9.2.1 */
bool BitStream::init_bool(size_t bytes)
{
@ -139,4 +108,35 @@ bool BitStream::exit_bool()
return padding_element == 0;
}
u8 BitStream::read_literal(size_t n)
{
u8 return_value = 0;
for (size_t i = 0; i < n; i++) {
return_value = (2 * return_value) + read_bool(128);
}
return return_value;
}
i8 BitStream::read_s(size_t n)
{
auto value = read_f(n);
auto sign = read_bit();
return sign ? -value : value;
}
u64 BitStream::get_position()
{
return (m_bytes_read * 8) + (7 - m_current_bit_position);
}
size_t BitStream::bytes_remaining()
{
return m_bytes_remaining;
}
size_t BitStream::bits_remaining()
{
return (bytes_remaining() * 8) + m_current_bit_position + 1;
}
}