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LibVideo/VP9: Use an enum to select segment features

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This throws out some ugly `#define`s we had that were taking the role
of an enum anyway. We now have some nice getters in the contexts that
take the place of the combo of `seg_feature_active()` and then doing a
lookup in `FrameContext::m_segmentation_features` directly.
This commit is contained in:
Zaggy1024 2023-04-16 23:29:48 -05:00 • committed by Tim Flynn
parent 6e6cc1ddb2
commit 094b0d8a78
8 changed files with 46 additions and 29 deletions
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29
Userland/Libraries/LibVideo/VP9/Parser.cpp
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@ -476,14 +476,14 @@ DecoderErrorOr<void> Parser::segmentation_params(FrameContext& frame_context)
return {};
frame_context.should_use_absolute_segment_base_quantizer = TRY_READ(frame_context.bit_stream.read_bit());
for (auto i = 0; i < MAX_SEGMENTS; i++) {
for (auto j = 0; j < SEG_LVL_MAX; j++) {
auto& feature = frame_context.segmentation_features[i][j];
for (auto segment_id = 0; segment_id < MAX_SEGMENTS; segment_id++) {
for (auto feature_id = 0; feature_id < to_underlying(SegmentFeature::Sentinel); feature_id++) {
auto& feature = frame_context.segmentation_features[segment_id][feature_id];
feature.enabled = TRY_READ(frame_context.bit_stream.read_bit());
if (feature.enabled) {
auto bits_to_read = segmentation_feature_bits[j];
auto bits_to_read = segmentation_feature_bits[feature_id];
feature.value = TRY_READ(frame_context.bit_stream.read_bits(bits_to_read));
if (segmentation_feature_signed[j]) {
if (segmentation_feature_signed[feature_id]) {
if (TRY_READ(frame_context.bit_stream.read_bit()))
feature.value = -feature.value;
}
@ -1094,16 +1094,11 @@ DecoderErrorOr<void> Parser::set_intra_segment_id(BlockContext& block_context)
DecoderErrorOr<bool> Parser::read_should_skip_residuals(BlockContext& block_context, FrameBlockContext above_context, FrameBlockContext left_context)
{
if (seg_feature_active(block_context, SEG_LVL_SKIP))
if (block_context.get_segment_feature(SegmentFeature::SkipResidualsOverride).enabled)
return true;
return TRY_READ(TreeParser::parse_skip(block_context.decoder, *m_probability_tables, block_context.counter, above_context, left_context));
}
bool Parser::seg_feature_active(BlockContext const& block_context, u8 feature)
{
return block_context.frame_context.segmentation_features[block_context.segment_id][feature].enabled;
}
DecoderErrorOr<TransformSize> Parser::read_tx_size(BlockContext& block_context, FrameBlockContext above_context, FrameBlockContext left_context, bool allow_select)
{
auto max_tx_size = max_txsize_lookup[block_context.size];
@ -1176,8 +1171,9 @@ u8 Parser::get_segment_id(BlockContext const& block_context)
DecoderErrorOr<bool> Parser::read_is_inter(BlockContext& block_context, FrameBlockContext above_context, FrameBlockContext left_context)
{
if (seg_feature_active(block_context, SEG_LVL_REF_FRAME))
return block_context.frame_context.segmentation_features[block_context.segment_id][SEG_LVL_REF_FRAME].value != ReferenceFrameType::None;
auto reference_frame_override_feature = block_context.get_segment_feature(SegmentFeature::ReferenceFrameOverride);
if (reference_frame_override_feature.enabled)
return reference_frame_override_feature.value != ReferenceFrameType::None;
return TRY_READ(TreeParser::parse_block_is_inter_predicted(block_context.decoder, *m_probability_tables, block_context.counter, above_context, left_context));
}
@ -1221,7 +1217,7 @@ DecoderErrorOr<void> Parser::inter_block_mode_info(BlockContext& block_context,
select_best_reference_motion_vectors(block_context, reference_motion_vectors, motion_vector_candidates, ReferenceIndex::Secondary);
}
if (seg_feature_active(block_context, SEG_LVL_SKIP)) {
if (block_context.get_segment_feature(SegmentFeature::SkipResidualsOverride).enabled) {
block_context.y_prediction_mode() = PredictionMode::ZeroMv;
} else if (block_context.size >= Block_8x8) {
block_context.y_prediction_mode() = TRY_READ(TreeParser::parse_inter_mode(block_context.decoder, *m_probability_tables, block_context.counter, block_context.mode_context[block_context.reference_frame_types.primary]));
@ -1259,8 +1255,9 @@ DecoderErrorOr<void> Parser::inter_block_mode_info(BlockContext& block_context,
DecoderErrorOr<void> Parser::read_ref_frames(BlockContext& block_context, FrameBlockContext above_context, FrameBlockContext left_context)
{
if (seg_feature_active(block_context, SEG_LVL_REF_FRAME)) {
block_context.reference_frame_types = { static_cast<ReferenceFrameType>(block_context.frame_context.segmentation_features[block_context.segment_id][SEG_LVL_REF_FRAME].value), ReferenceFrameType::None };
auto reference_frame_override_feature = block_context.get_segment_feature(SegmentFeature::ReferenceFrameOverride);
if (reference_frame_override_feature.enabled) {
block_context.reference_frame_types = { static_cast<ReferenceFrameType>(reference_frame_override_feature.value), ReferenceFrameType::None };
return {};
}