`struct LossLess`: Make `Rav1dFrameHeader_segmentation::lossless` a bit array#1231

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kkysen wants to merge 11 commits intomainfrom kkysen/struct-LossLess-bit-array

+747-890

Commits on Jun 24, 2024

enum TxfmSize: Make a real enum.
kkysen
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fn BlockSize::dimensions: Make static dav1d_block_dimensions private and access it through this fn.
kkysen
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fn get_lo_ctx: match on ctx_offsets (Option) instead of tx_class to avoid an .unwrap().
kkysen
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fn get_lo_ctx: Make stride arg a u8 (necessary to prohibit overflows on multiplication) and pre-slice levels.
kkysen
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fn get_lo_ctx: Make x, y args u32s instead of usizes.
kkysen
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fn get_lo_ctx: Make return type u8.
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fn decode_coefs: Make ctx var a u8.
kkysen
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fn get_lo_ctx: Make mag var a u32.
kkysen
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fn get_lo_ctx: Pre-index levels to bounds check all at once.
kkysen
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struct Lossless: Make Rav1dFrameHeader_segmentation::lossless a bit array.
kkysen
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fn Lossless::from_array: Add a comment explaining why it's not optimized as much as possible.
kkysen
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