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jpegloader
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DimaO87
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jpegloader
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src/jpegfunc.c
42 строки
1008 B
Khruschev Dmitry aka DimaO
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19 ноя 2025, 09:31
19 ноя 2025, 09:31
89a4b96
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#include "jpegfunc.h" #ifdef HAVE_CONFIG_H #include <config.h> #endif // HAVE_CONFIG_H const uint8_t dzz[64] = { 0, 1, 8, 16, 9, 2, 3, 10, 17, 24, 32, 25, 18, 11, 4, 5, 12, 19, 26, 33, 40, 48, 41, 34, 27, 20, 13, 6, 7, 14, 21, 28, 35, 42, 49, 56, 57, 50, 43, 36, 29, 22, 15, 23, 30, 37, 44, 51, 58, 59, 52, 45, 38, 31, 39, 46, 53, 60, 61, 54, 47, 55, 62, 63 }; /* ********************************* clampi ******************************** */ int clampi (int value, int min, int max) { return (value < min) ? (min) : ((value > max) ? max : value); } /* ********************************* ntohs ********************************* */ uint16_t ntohs (uint16_t val) { #ifdef WORDS_BIGENDIAN return val; #else return ((val & 0xFF) << 8) | ((val & 0xFF00) >> 8); #endif // WORDS_BIGENDIAN } /* ****************************** dezigzaging ****************************** */ int dezigzaging (int i) { if ((i < 0) || (i >= 64)) return 0; else return dzz[i]; }