On Thu, Jan 02, 2020 at 03:22:25PM +0000, Derek Buitenhuis wrote: > Currently, the decoder checks the 128th value of the 4th quant table during > while deriving the context on each sample, in order to speed itself up. This > is due to relying on the behavior of FFmpeg's FFV1 encoder, in which if that > value is zero, the entire 4th and 5th quant tables are assumed to be entirely > zero.
I think if entry 128 is 0 then the whole table must be 0. If that is the case, checking the entry 128 of table 4 and 5 would be enough and caching the entry comparission is maybe not needed. thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Dictatorship: All citizens are under surveillance, all their steps and actions recorded, for the politicians to enforce control. Democracy: All politicians are under surveillance, all their steps and actions recorded, for the citizens to enforce control.
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