FreeCalypso > hg > gsm-codec-lib

annotate libgsmfrp/state.c @ 247:56d3fbacd115

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
dev: new program xmaxc-tables
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 12 May 2023 02:04:42 +0000
parents 286d5f097eb4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * In this module we implement allocation and initialization
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * of state structures for our GSM FR preprocessor.
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 */
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5
4
286d5f097eb4 libgsmfrp: implement comfort noise generation
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
diff changeset
6 #include <stdint.h>
3
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include <stdlib.h>
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include <string.h>
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include "gsm_fr_preproc.h"
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include "internal.h"
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 struct gsmfr_preproc_state *gsmfr_preproc_create(void)
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 {
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 struct gsmfr_preproc_state *st;
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 st = malloc(sizeof(struct gsmfr_preproc_state));
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 if (st)
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 gsmfr_preproc_reset(st);
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 return st;
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 }
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 void gsmfr_preproc_reset(struct gsmfr_preproc_state *st)
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 {
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 memset(st, 0, sizeof(struct gsmfr_preproc_state));
4
286d5f097eb4 libgsmfrp: implement comfort noise generation
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
diff changeset
25 st->cn_random_lfsr = PN_INITIAL_SEED;
3
3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 }