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LibVideo/VP9: Remove m_mi_row and col fields from the parser

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These are now passed as parameters to each function that uses them.
These will later be moved to a struct to further reduce the amount of
parameters that get passed around.

Above and left per-frame block contexts are now also parameters passed
to the functions that use them instead of being retrieved when needed
from a field. This will allow them to be more easily moved to a tile-
specific context later.
This commit is contained in:
Zaggy1024 2022-11-20 17:25:51 -06:00 • committed by Andreas Kling
parent 4a4aa697d9
commit 10d207959d
4 changed files with 94 additions and 120 deletions
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20
Userland/Libraries/LibVideo/VP9/Decoder.cpp
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@ -721,7 +721,7 @@ MotionVector Decoder::select_motion_vector(u8 plane, u8 ref_list, u32 block_inde
+ m_parser->m_block_mvs[ref_list][2] + m_parser->m_block_mvs[ref_list][3]);
}
MotionVector Decoder::clamp_motion_vector(u8 plane, MotionVector vector)
MotionVector Decoder::clamp_motion_vector(u8 plane, u32 block_row, u32 block_column, MotionVector vector)
{
// FIXME: This function is named very similarly to Parser::clamp_mv. Rename one or the other?
@ -736,12 +736,12 @@ MotionVector Decoder::clamp_motion_vector(u8 plane, MotionVector vector)
// The output array clampedMv is specified by the following steps:
i32 blocks_high = num_8x8_blocks_high_lookup[m_parser->m_mi_size];
// Casts must be done here to prevent subtraction underflow from wrapping the values.
i32 mb_to_top_edge = -(static_cast<i32>(m_parser->m_mi_row * MI_SIZE) * 16) >> subsampling_y;
i32 mb_to_bottom_edge = (((static_cast<i32>(m_parser->m_mi_rows) - blocks_high - static_cast<i32>(m_parser->m_mi_row)) * MI_SIZE) * 16) >> subsampling_y;
i32 mb_to_top_edge = -(static_cast<i32>(block_row * MI_SIZE) * 16) >> subsampling_y;
i32 mb_to_bottom_edge = (((static_cast<i32>(m_parser->m_mi_rows) - blocks_high - static_cast<i32>(block_row)) * MI_SIZE) * 16) >> subsampling_y;
i32 blocks_wide = num_8x8_blocks_wide_lookup[m_parser->m_mi_size];
i32 mb_to_left_edge = -(static_cast<i32>(m_parser->m_mi_col * MI_SIZE) * 16) >> subsampling_x;
i32 mb_to_right_edge = (((static_cast<i32>(m_parser->m_mi_cols) - blocks_wide - static_cast<i32>(m_parser->m_mi_col)) * MI_SIZE) * 16) >> subsampling_x;
i32 mb_to_left_edge = -(static_cast<i32>(block_column * MI_SIZE) * 16) >> subsampling_x;
i32 mb_to_right_edge = (((static_cast<i32>(m_parser->m_mi_cols) - blocks_wide - static_cast<i32>(block_column)) * MI_SIZE) * 16) >> subsampling_x;
i32 subpel_left = (INTERP_EXTEND + ((blocks_wide * MI_SIZE) >> subsampling_x)) << SUBPEL_BITS;
i32 subpel_right = subpel_left - SUBPEL_SHIFTS;
@ -753,7 +753,7 @@ MotionVector Decoder::clamp_motion_vector(u8 plane, MotionVector vector)
};
}
DecoderErrorOr<void> Decoder::predict_inter_block(u8 plane, u8 ref_list, u32 x, u32 y, u32 width, u32 height, u32 block_index, Span<u16> block_buffer)
DecoderErrorOr<void> Decoder::predict_inter_block(u8 plane, u8 ref_list, u32 block_row, u32 block_column, u32 x, u32 y, u32 width, u32 height, u32 block_index, Span<u16> block_buffer)
{
VERIFY(width <= maximum_block_dimensions && height <= maximum_block_dimensions);
// 2. The motion vector selection process in section 8.5.2.1 is invoked with plane, refList, blockIdx as inputs
@ -762,7 +762,7 @@ DecoderErrorOr<void> Decoder::predict_inter_block(u8 plane, u8 ref_list, u32 x,
// 3. The motion vector clamping process in section 8.5.2.2 is invoked with plane, mv as inputs and the output
// being the clamped motion vector clampedMv
auto clamped_vector = clamp_motion_vector(plane, motion_vector);
auto clamped_vector = clamp_motion_vector(plane, block_row, block_column, motion_vector);
// 4. The motion vector scaling process in section 8.5.2.3 is invoked with plane, refList, x, y, clampedMv as
// inputs and the output being the initial location startX, startY, and the step sizes stepX, stepY.
@ -923,7 +923,7 @@ DecoderErrorOr<void> Decoder::predict_inter_block(u8 plane, u8 ref_list, u32 x,
return {};
}
DecoderErrorOr<void> Decoder::predict_inter(u8 plane, u32 x, u32 y, u32 width, u32 height, u32 block_index)
DecoderErrorOr<void> Decoder::predict_inter(u8 plane, u32 block_row, u32 block_column, u32 x, u32 y, u32 width, u32 height, u32 block_index)
{
// The inter prediction process is invoked for inter coded blocks. When MiSize is smaller than BLOCK_8X8, the
// prediction is done with a granularity of 4x4 samples, otherwise the whole plane is predicted at the same time.
@ -942,7 +942,7 @@ DecoderErrorOr<void> Decoder::predict_inter(u8 plane, u32 x, u32 y, u32 width, u
// 2. through 5.
Array<u16, maximum_block_size> predicted_buffer;
auto predicted_span = predicted_buffer.span().trim(width * height);
TRY(predict_inter_block(plane, 0, x, y, width, height, block_index, predicted_span));
TRY(predict_inter_block(plane, 0, block_row, block_column, x, y, width, height, block_index, predicted_span));
auto predicted_buffer_at = [&](Span<u16> buffer, u32 row, u32 column) -> u16& {
return buffer[row * width + column];
};
@ -976,7 +976,7 @@ DecoderErrorOr<void> Decoder::predict_inter(u8 plane, u32 x, u32 y, u32 width, u
// for i = 0..h-1 and j = 0..w-1.
Array<u16, maximum_block_size> second_predicted_buffer;
auto second_predicted_span = second_predicted_buffer.span().trim(width * height);
TRY(predict_inter_block(plane, 1, x, y, width, height, block_index, second_predicted_span));
TRY(predict_inter_block(plane, 1, block_row, block_column, x, y, width, height, block_index, second_predicted_span));
for (auto i = 0u; i < height_in_frame_buffer; i++) {
for (auto j = 0u; j < width_in_frame_buffer; j++)