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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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5
Userland/Libraries/LibVideo/VP9/Decoder.cpp
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@ -1173,9 +1173,10 @@ u8 Decoder::get_base_quantizer_index(BlockContext const& block_context)
{
// The function get_qindex( ) returns the quantizer index for the current block and is specified by the following:
// − If seg_feature_active( SEG_LVL_ALT_Q ) is equal to 1 the following ordered steps apply:
if (Parser::seg_feature_active(block_context, SEG_LVL_ALT_Q)) {
auto alternative_quantizer_feature = block_context.get_segment_feature(SegmentFeature::UseAlternativeQuantizerBase);
if (alternative_quantizer_feature.enabled) {
// 1. Set the variable data equal to FeatureData[ segment_id ][ SEG_LVL_ALT_Q ].
auto data = block_context.frame_context.segmentation_features[block_context.segment_id][SEG_LVL_ALT_Q].value;
auto data = alternative_quantizer_feature.value;
// 2. If segmentation_abs_or_delta_update is equal to 0, set data equal to base_q_idx + data
if (!block_context.frame_context.should_use_absolute_segment_base_quantizer) {