RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 17:37:35 +00:00
Code Issues Activity Actions

LibVideo/VP9: Remove the m_use_hp field from Parser

Browse source 
This one is entirely scoped to the motion vector parsing function and
its individual component read function.
This commit is contained in:
Zaggy1024 2022-11-27 00:58:18 -06:00 • committed by Andreas Kling
parent 316dad7bf7
commit 6ffb0844a1
2 changed files with 7 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

12
Userland/Libraries/LibVideo/VP9/Parser.cpp
View file

@ -1281,19 +1281,19 @@ static bool should_use_high_precision_motion_vector(MotionVector const& delta_ve
// read_mv( ref ) in the spec.
DecoderErrorOr<MotionVector> Parser::read_motion_vector(BlockContext const& block_context, BlockMotionVectorCandidates const& candidates, ReferenceIndex reference_index)
{
m_use_hp = block_context.frame_context.high_precision_motion_vectors_allowed && should_use_high_precision_motion_vector(candidates[reference_index].best_vector);
auto use_high_precision = block_context.frame_context.high_precision_motion_vectors_allowed && should_use_high_precision_motion_vector(candidates[reference_index].best_vector);
MotionVector delta_vector;
auto joint = TRY_READ(TreeParser::parse_motion_vector_joint(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter));
if ((joint & MotionVectorNonZeroRow) != 0)
delta_vector.set_row(TRY(read_single_motion_vector_component(0)));
delta_vector.set_row(TRY(read_single_motion_vector_component(0, use_high_precision)));
if ((joint & MotionVectorNonZeroColumn) != 0)
delta_vector.set_column(TRY(read_single_motion_vector_component(1)));
delta_vector.set_column(TRY(read_single_motion_vector_component(1, use_high_precision)));
return candidates[reference_index].best_vector + delta_vector;
}
// read_mv_component( comp ) in the spec.
DecoderErrorOr<i32> Parser::read_single_motion_vector_component(u8 component)
DecoderErrorOr<i32> Parser::read_single_motion_vector_component(u8 component, bool use_high_precision)
{
auto mv_sign = TRY_READ(TreeParser::parse_motion_vector_sign(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, component));
auto mv_class = TRY_READ(TreeParser::parse_motion_vector_class(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, component));
@ -1301,7 +1301,7 @@ DecoderErrorOr<i32> Parser::read_single_motion_vector_component(u8 component)
if (mv_class == MvClass0) {
auto mv_class0_bit = TRY_READ(TreeParser::parse_motion_vector_class0_bit(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, component));
auto mv_class0_fr = TRY_READ(TreeParser::parse_motion_vector_class0_fr(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, component, mv_class0_bit));
auto mv_class0_hp = TRY_READ(TreeParser::parse_motion_vector_class0_hp(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, component, m_use_hp));
auto mv_class0_hp = TRY_READ(TreeParser::parse_motion_vector_class0_hp(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, component, use_high_precision));
magnitude = ((mv_class0_bit << 3) | (mv_class0_fr << 1) | mv_class0_hp) + 1;
} else {
u32 bits = 0;
@ -1311,7 +1311,7 @@ DecoderErrorOr<i32> Parser::read_single_motion_vector_component(u8 component)
}
magnitude = CLASS0_SIZE << (mv_class + 2);
auto mv_fr = TRY_READ(TreeParser::parse_motion_vector_fr(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, component));
auto mv_hp = TRY_READ(TreeParser::parse_motion_vector_hp(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, component, m_use_hp));
auto mv_hp = TRY_READ(TreeParser::parse_motion_vector_hp(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, component, use_high_precision));
magnitude += ((bits << 3) | (mv_fr << 1) | mv_hp) + 1;
}
return (mv_sign ? -1 : 1) * static_cast<i32>(magnitude);

4
Userland/Libraries/LibVideo/VP9/Parser.h
View file

@ -120,7 +120,7 @@ private:
DecoderErrorOr<void> read_ref_frames(BlockContext&, FrameBlockContext above_context, FrameBlockContext left_context);
DecoderErrorOr<MotionVectorPair> get_motion_vector(BlockContext const&, BlockMotionVectorCandidates const&);
DecoderErrorOr<MotionVector> read_motion_vector(BlockContext const&, BlockMotionVectorCandidates const&, ReferenceIndex);
DecoderErrorOr<i32> read_single_motion_vector_component(u8 component);
DecoderErrorOr<i32> read_single_motion_vector_component(u8 component, bool use_high_precision);
DecoderErrorOr<bool> residual(BlockContext&, bool has_block_above, bool has_block_left);
DecoderErrorOr<bool> tokens(BlockContext&, size_t plane, u32 x, u32 y, TransformSize, TransformSet, Array<u8, 1024> token_cache);
DecoderErrorOr<i32> read_coef(u8 bit_depth, Token token);
@ -162,8 +162,6 @@ private:
Vector<u16> m_frame_store[NUM_REF_FRAMES][3];
bool m_use_hp { false };
bool m_use_prev_frame_mvs;
Vector2D<FrameBlockContext> m_reusable_frame_block_contexts;
Vector2D<PersistentBlockContext> m_previous_block_contexts;