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LibVideo/VP9: Move the left non-zero tokens context to TileContext

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The array containing the vertical line of bools indicating whether non-
zero tokens were decoded in each sub-block is moved to TileContext, and
a span of the valid range for a block to read and write to is created
when we construct a BlockContext.
This commit is contained in:
Zaggy1024 2022-11-27 04:13:12 -06:00 • committed by Andreas Kling
parent 06082d310f
commit 4e7e9d8479
7 changed files with 96 additions and 43 deletions
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8
Userland/Libraries/LibVideo/VP9/TreeParser.cpp
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@ -626,11 +626,9 @@ ErrorOr<bool> TreeParser::parse_motion_vector_hp(BitStream& bit_stream, Probabil
return value;
}
TokensContext TreeParser::get_context_for_first_token(BlockContext const& block_context, Array<Vector<bool>, 3> const& above_non_zero_tokens, Array<Vector<bool>, 3> const& left_non_zero_tokens, TransformSize transform_size, u8 plane, u32 sub_block_column, u32 sub_block_row, bool is_inter, u8 band)
TokensContext TreeParser::get_context_for_first_token(BlockContext const& block_context, Array<Vector<bool>, 3> const& above_non_zero_tokens, NonZeroTokensView left_non_zero_tokens_in_block, TransformSize transform_size, u8 plane, u32 sub_block_column, u32 sub_block_row, bool is_inter, u8 band)
{
auto subsampling_x = plane > 0 ? block_context.frame_context.color_config.subsampling_x : false;
auto subsampling_y = plane > 0 ? block_context.frame_context.color_config.subsampling_y : false;
auto transform_top_in_sub_blocks = (blocks_to_sub_blocks(block_context.row) >> subsampling_y) + sub_block_row;
auto transform_left_in_sub_blocks = (blocks_to_sub_blocks(block_context.column) >> subsampling_x) + sub_block_column;
u8 transform_size_in_sub_blocks = transform_size_to_sub_blocks(transform_size);
bool above_has_non_zero_tokens = false;
@ -641,8 +639,8 @@ TokensContext TreeParser::get_context_for_first_token(BlockContext const& block_
}
}
bool left_has_non_zero_tokens = false;
for (u8 y = 0; y < transform_size_in_sub_blocks && y < left_non_zero_tokens[plane].size() - transform_top_in_sub_blocks; y++) {
if (left_non_zero_tokens[plane][transform_top_in_sub_blocks + y]) {
for (u8 y = 0; y < transform_size_in_sub_blocks && y < left_non_zero_tokens_in_block[plane].size() - sub_block_row; y++) {
if (left_non_zero_tokens_in_block[plane][sub_block_row + y]) {
left_has_non_zero_tokens = true;
break;
}