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LibVideo/VP9: Convert token scan order indices to u16

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They are directly taken from lookup tables that only need that bit
precision, so may as well shrink them.
This commit is contained in:
Zaggy1024 2022-11-28 08:21:23 -06:00 • committed by Andreas Kling
parent b6f41fe7d9
commit 062da60443
4 changed files with 22 additions and 22 deletions
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18
Userland/Libraries/LibVideo/VP9/Parser.cpp
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@ -1421,7 +1421,7 @@ DecoderErrorOr<bool> Parser::residual(BlockContext& block_context, bool has_bloc
return had_residual_tokens;
}
static u32 const* get_scan(TXSize tx_size, u8 transform_type)
static u16 const* get_scan(TXSize tx_size, u8 transform_type)
{
if (tx_size == TX_4x4) {
if (transform_type == ADST_DCT)
@ -1449,14 +1449,14 @@ static u32 const* get_scan(TXSize tx_size, u8 transform_type)
DecoderErrorOr<bool> Parser::tokens(BlockContext& block_context, size_t plane, u32 start_x, u32 start_y, TXSize tx_size, u8 transform_type)
{
u32 segment_eob = 16 << (tx_size << 1);
u16 segment_eob = 16 << (tx_size << 1);
auto const* scan = get_scan(tx_size, transform_type);
auto check_eob = true;
u32 c = 0;
for (; c < segment_eob; c++) {
auto pos = scan[c];
auto band = (tx_size == TX_4x4) ? coefband_4x4[c] : coefband_8x8plus[c];
auto tokens_context = TreeParser::get_tokens_context(block_context.frame_context.color_config.subsampling_x, block_context.frame_context.color_config.subsampling_y, block_context.frame_context.rows(), block_context.frame_context.columns(), m_above_nonzero_context, m_left_nonzero_context, m_token_cache, tx_size, transform_type, plane, start_x, start_y, pos, block_context.is_inter_predicted(), band, c);
u16 coef_index = 0;
for (; coef_index < segment_eob; coef_index++) {
auto pos = scan[coef_index];
auto band = (tx_size == TX_4x4) ? coefband_4x4[coef_index] : coefband_8x8plus[coef_index];
auto tokens_context = TreeParser::get_tokens_context(block_context.frame_context.color_config.subsampling_x, block_context.frame_context.color_config.subsampling_y, block_context.frame_context.rows(), block_context.frame_context.columns(), m_above_nonzero_context, m_left_nonzero_context, m_token_cache, tx_size, transform_type, plane, start_x, start_y, pos, block_context.is_inter_predicted(), band, coef_index);
if (check_eob) {
auto more_coefs = TRY_READ(TreeParser::parse_more_coefficients(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, tokens_context));
if (!more_coefs)
@ -1474,9 +1474,9 @@ DecoderErrorOr<bool> Parser::tokens(BlockContext& block_context, size_t plane, u
check_eob = true;
}
}
for (u32 i = c; i < segment_eob; i++)
for (u16 i = coef_index; i < segment_eob; i++)
m_tokens[scan[i]] = 0;
return c > 0;
return coef_index > 0;
}
DecoderErrorOr<i32> Parser::read_coef(u8 bit_depth, Token token)