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contrib
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xz
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liblzma
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rangecoder
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price.h
(1.97 KB)
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price_table.c
(827 B)
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price_tablegen.c
(1.73 KB)
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range_common.h
(2.26 KB)
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range_decoder.h
(4.89 KB)
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range_encoder.h
(4.51 KB)
Editing: price_tablegen.c
/////////////////////////////////////////////////////////////////////////////// // /// \file price_tablegen.c /// \brief Probability price table generator /// /// Compiling: gcc -std=c99 -o price_tablegen price_tablegen.c /// // Authors: Igor Pavlov // Lasse Collin // // This file has been put into the public domain. // You can do whatever you want with this file. // /////////////////////////////////////////////////////////////////////////////// #include <inttypes.h> #include <stdio.h> #include "range_common.h" #include "price.h" static uint32_t rc_prices[RC_PRICE_TABLE_SIZE]; static void init_price_table(void) { for (uint32_t i = (UINT32_C(1) << RC_MOVE_REDUCING_BITS) / 2; i < RC_BIT_MODEL_TOTAL; i += (UINT32_C(1) << RC_MOVE_REDUCING_BITS)) { const uint32_t cycles_bits = RC_BIT_PRICE_SHIFT_BITS; uint32_t w = i; uint32_t bit_count = 0; for (uint32_t j = 0; j < cycles_bits; ++j) { w *= w; bit_count <<= 1; while (w >= (UINT32_C(1) << 16)) { w >>= 1; ++bit_count; } } rc_prices[i >> RC_MOVE_REDUCING_BITS] = (RC_BIT_MODEL_TOTAL_BITS << cycles_bits) - 15 - bit_count; } return; } static void print_price_table(void) { printf("/* This file has been automatically generated by " "price_tablegen.c. */\n\n" "#include \"range_encoder.h\"\n\n" "const uint8_t lzma_rc_prices[" "RC_PRICE_TABLE_SIZE] = {"); const size_t array_size = sizeof(lzma_rc_prices) / sizeof(lzma_rc_prices[0]); for (size_t i = 0; i < array_size; ++i) { if (i % 8 == 0) printf("\n\t"); printf("%4" PRIu32, rc_prices[i]); if (i != array_size - 1) printf(","); } printf("\n};\n"); return; } int main(void) { init_price_table(); print_price_table(); return 0; }
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