FreeCalypso > hg > gsm-codec-lib

annotate libgsmfrp/state.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 286d5f097eb4
children
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3cd5ad24b1d4 libgsmfrp: implement internal state
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
3cd5ad24b1d4 libgsmfrp: implement internal state
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2 * In this module we implement allocation and initialization
3cd5ad24b1d4 libgsmfrp: implement internal state
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3 * of state structures for our GSM FR preprocessor.
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4 */
3cd5ad24b1d4 libgsmfrp: implement internal state
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286d5f097eb4 libgsmfrp: implement comfort noise generation
Mychaela Falconia <falcon@freecalypso.org>
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6 #include <stdint.h>
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3cd5ad24b1d4 libgsmfrp: implement internal state
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7 #include <stdlib.h>
3cd5ad24b1d4 libgsmfrp: implement internal state
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8 #include <string.h>
3cd5ad24b1d4 libgsmfrp: implement internal state
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9 #include "gsm_fr_preproc.h"
3cd5ad24b1d4 libgsmfrp: implement internal state
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10 #include "internal.h"
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3cd5ad24b1d4 libgsmfrp: implement internal state
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12 struct gsmfr_preproc_state *gsmfr_preproc_create(void)
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13 {
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14 struct gsmfr_preproc_state *st;
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3cd5ad24b1d4 libgsmfrp: implement internal state
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16 st = malloc(sizeof(struct gsmfr_preproc_state));
3cd5ad24b1d4 libgsmfrp: implement internal state
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17 if (st)
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18 gsmfr_preproc_reset(st);
3cd5ad24b1d4 libgsmfrp: implement internal state
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19 return st;
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20 }
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22 void gsmfr_preproc_reset(struct gsmfr_preproc_state *st)
3cd5ad24b1d4 libgsmfrp: implement internal state
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23 {
3cd5ad24b1d4 libgsmfrp: implement internal state
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24 memset(st, 0, sizeof(struct gsmfr_preproc_state));
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286d5f097eb4 libgsmfrp: implement comfort noise generation
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25 st->cn_random_lfsr = PN_INITIAL_SEED;
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26 }