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/** @file debias.h * * Perform a von-neumann debiassing of a random bitstream. */ #ifndef RANDOMSOUND_DEBIAS_H #define RANDOMSOUND_DEBIAS_H #include "bitbuffer.h" /** Transfer bits from one buffer to another, debiassing en-route. * * Performing a von-neumann debiassing, transfer bits from the \a from * ::BitBuffer to the \a to ::BitBuffer. * * This method of debiassing will produce at absolute maximum, a drop * of 50% in the bitcount. I.E. at minimum you will lose one bit in two. * * In actuality, in a truly random stream, you will lose three bits in * four, which means that the debiassing will leave you with around * one quarter the number of bits you started with. * * @param from The ::BitBuffer to extract bits from. * @param to The ::BitBuffer to add debiassed bits to. * @return The number of bits added to \a to. */ int transfer_bits_and_debias(BitBuffer from, BitBuffer to); #endif

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