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annotate miscutil/bitmanip.c @ 101:d86f866489e9

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gsm-amr2efr utility written
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 27 Nov 2022 05:15:39 +0000
parents frtest/tidsp.c@7960744ba19c
children 41f1ae68d253
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7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
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1 /*
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d86f866489e9 gsm-amr2efr utility written
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2 * This module provides two utility functions that serve as building blocks
d86f866489e9 gsm-amr2efr utility written
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3 * for frame bit reordering operations.
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4 */
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5
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d86f866489e9 gsm-amr2efr utility written
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6 #include <stdint.h>
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8 msb_get_bit(buf, bn)
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9 uint8_t *buf;
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10 {
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11 int pos_byte = bn >> 3;
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12 int pos_bit = 7 - (bn & 7);
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14 return (buf[pos_byte] >> pos_bit) & 1;
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15 }
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17 msb_set_bit(buf, bn, bit)
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18 uint8_t *buf;
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19 {
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
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20 int pos_byte = bn >> 3;
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
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21 int pos_bit = 7 - (bn & 7);
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23 buf[pos_byte] |= (bit << pos_bit);
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24 }