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comparison libtwamr/dhf_subst.c @ 431:f0496507d409

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libtwamr: implement amr_dhf_subst_efr()
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 08 May 2024 00:27:51 +0000
parents libtwamr/dhf_check.c@9beb01439a90
children
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430:edbbbf1c4ab1 431:f0496507d409
1 /*
2 * The function implemented in this module is an aid for AMR-EFR interworking:
3 * it is meant to be invoked directly after amr_encode_frame(), it checks
4 * the encoder output for MR122 DHF, and if the generated frame exactly
5 * matches MR122 DHF, it is changed to GSM-EFR DHF.
6 */
7
8 #include <stdint.h>
9 #include <string.h>
10 #include "tw_amr.h"
11
12 void amr_dhf_subst_efr(struct amr_param_frame *frame)
13 {
14 if (frame->type != TX_SPEECH_GOOD)
15 return;
16 if (frame->mode != MR122)
17 return;
18 if (memcmp(frame->param, amr_dhf_mr122, AMR_MAX_PRM * sizeof(int16_t)))
19 return;
20 memcpy(frame->param, amr_dhf_gsmefr, AMR_MAX_PRM * sizeof(int16_t));
21 }