Struct DeltaOfDeltaCompressor

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pub struct DeltaOfDeltaCompressor { /* private fields */ }

Expand description

Delta-of-delta compressor for timestamps

Exploits regularity in sensor sampling intervals. For 1Hz regular sampling, compresses timestamps to <2 bits per sample.

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impl DeltaOfDeltaCompressor

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pub fn new(first_timestamp: i64) -> Self

Create new compressor with first timestamp

A 32-bit count header is prepended when finish() is called.

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pub fn compress(&mut self, timestamp: i64)

Compress a timestamp

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pub fn finish(self) -> Vec<u8> ⓘ

Finish compression and return compressed bytes

Returns: [count (4 bytes BE)] + [compressed bit stream]

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pub fn compression_ratio(&self, original_count: usize) -> f64

Get current compression ratio

Auto Trait Implementations§

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impl UnwindSafe for DeltaOfDeltaCompressor

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