FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/dhf_subst.c @ 550:de333989a12b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
document gsm[e]fr-decode-tw5[-r] utilities
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 05 Oct 2024 02:16:48 +0000
parents f0496507d409
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
355
9beb01439a90 libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
431
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
2 * The function implemented in this module is an aid for AMR-EFR interworking:
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
3 * it is meant to be invoked directly after amr_encode_frame(), it checks
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
4 * the encoder output for MR122 DHF, and if the generated frame exactly
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
5 * matches MR122 DHF, it is changed to GSM-EFR DHF.
355
9beb01439a90 libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 */
9beb01439a90 libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7
9beb01439a90 libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include <stdint.h>
9beb01439a90 libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include <string.h>
9beb01439a90 libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include "tw_amr.h"
9beb01439a90 libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11
431
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
12 void amr_dhf_subst_efr(struct amr_param_frame *frame)
355
9beb01439a90 libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 {
431
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
14 if (frame->type != TX_SPEECH_GOOD)
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
15 return;
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
16 if (frame->mode != MR122)
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
17 return;
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
18 if (memcmp(frame->param, amr_dhf_mr122, AMR_MAX_PRM * sizeof(int16_t)))
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
19 return;
f0496507d409 libtwamr: implement amr_dhf_subst_efr()
Mychaela Falconia <falcon@freecalypso.org>
parents: 355
diff changeset
20 memcpy(frame->param, amr_dhf_gsmefr, AMR_MAX_PRM * sizeof(int16_t));
355
9beb01439a90 libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 }