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LibVideo/VP9: Use u32 to store the parsed value counts

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There were rare cases in which u8 was not large enough for the total
count of values read, and increasing this to u32 should have no real
effect on performance (hopefully).
This commit is contained in:
Zaggy1024 2023-02-02 23:14:59 -06:00 • committed by Jelle Raaijmakers
commit 7b92eff4a6
Notes: sideshowbarker 2024-07-17 07:43:44 +09:00
5 changed files with 74 additions and 79 deletions
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6
Userland/Libraries/LibVideo/VP9/Decoder.cpp
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@ -228,7 +228,7 @@ u8 Decoder::merge_prob(u8 pre_prob, u32 count_0, u32 count_1, u8 count_sat, u8 m
return round_2(pre_prob * (256 - factor) + (prob * factor), 8);
}
u32 Decoder::merge_probs(int const* tree, int index, u8* probs, u8* counts, u8 count_sat, u8 max_update_factor)
u32 Decoder::merge_probs(int const* tree, int index, u8* probs, u32* counts, u8 count_sat, u8 max_update_factor)
{
auto s = tree[index];
auto left_count = (s <= 0) ? counts[-s] : merge_probs(tree, s, probs, counts, count_sat, max_update_factor);
@ -329,12 +329,12 @@ DecoderErrorOr<void> Decoder::adapt_non_coef_probs(FrameContext const& frame_con
return {};
}
void Decoder::adapt_probs(int const* tree, u8* probs, u8* counts)
void Decoder::adapt_probs(int const* tree, u8* probs, u32* counts)
{
merge_probs(tree, 0, probs, counts, COUNT_SAT, MAX_UPDATE_FACTOR);
}
u8 Decoder::adapt_prob(u8 prob, u8 counts[2])
u8 Decoder::adapt_prob(u8 prob, u32 counts[2])
{
return merge_prob(prob, counts[0], counts[1], COUNT_SAT, MAX_UPDATE_FACTOR);
}