FreeCalypso > hg > gsm-codec-lib

annotate amrconv/bitmanip.c @ 369:a01de4e40540

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
libtwamr: integrate q_gain_p.c
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 06 May 2024 03:22:07 +0000
parents b092a510141e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
19
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
101
d86f866489e9 gsm-amr2efr utility written
Mychaela Falconia <falcon@freecalypso.org>
parents: 19
diff changeset
2 * This module provides two utility functions that serve as building blocks
d86f866489e9 gsm-amr2efr utility written
Mychaela Falconia <falcon@freecalypso.org>
parents: 19
diff changeset
3 * for frame bit reordering operations.
19
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 */
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5
101
d86f866489e9 gsm-amr2efr utility written
Mychaela Falconia <falcon@freecalypso.org>
parents: 19
diff changeset
6 #include <stdint.h>
19
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 msb_get_bit(buf, bn)
101
d86f866489e9 gsm-amr2efr utility written
Mychaela Falconia <falcon@freecalypso.org>
parents: 19
diff changeset
9 uint8_t *buf;
19
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 {
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 int pos_byte = bn >> 3;
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 int pos_bit = 7 - (bn & 7);
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 return (buf[pos_byte] >> pos_bit) & 1;
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 }
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 msb_set_bit(buf, bn, bit)
101
d86f866489e9 gsm-amr2efr utility written
Mychaela Falconia <falcon@freecalypso.org>
parents: 19
diff changeset
18 uint8_t *buf;
19
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 {
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 int pos_byte = bn >> 3;
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 int pos_bit = 7 - (bn & 7);
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22
107
41f1ae68d253 amr2efr & efr2amr cosmetic: cleaner approach to bit reshuffling
Mychaela Falconia <falcon@freecalypso.org>
parents: 101
diff changeset
23 if (bit)
41f1ae68d253 amr2efr & efr2amr cosmetic: cleaner approach to bit reshuffling
Mychaela Falconia <falcon@freecalypso.org>
parents: 101
diff changeset
24 buf[pos_byte] |= (1 << pos_bit);
41f1ae68d253 amr2efr & efr2amr cosmetic: cleaner approach to bit reshuffling
Mychaela Falconia <falcon@freecalypso.org>
parents: 101
diff changeset
25 else
41f1ae68d253 amr2efr & efr2amr cosmetic: cleaner approach to bit reshuffling
Mychaela Falconia <falcon@freecalypso.org>
parents: 101
diff changeset
26 buf[pos_byte] &= ~(1 << pos_bit);
19
7960744ba19c frtest: gsmfr-cvt-dlcap program based on fc-tch2fr
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 }