FreeCalypso > hg > gsm-codec-lib
annotate libtwamr/dhf_check.c @ 509:b7ddcb178ef6 default tip
add WIP:gsmhr note file
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 17 Aug 2024 23:11:51 +0000 |
parents | 9beb01439a90 |
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rev | line source |
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libtwamr: implement DHF check function
Mychaela Falconia <falcon@freecalypso.org>
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1 /* |
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2 * This module implements the DHF checking function. |
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3 */ |
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4 |
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5 #include <stdint.h> |
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6 #include <string.h> |
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7 #include "tw_amr.h" |
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8 #include "typedef.h" |
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9 #include "namespace.h" |
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10 #include "bitno.h" |
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11 |
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12 static const Word16 * const dhf_per_mode[8] = { |
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13 amr_dhf_mr475, |
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14 amr_dhf_mr515, |
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15 amr_dhf_mr59, |
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16 amr_dhf_mr67, |
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17 amr_dhf_mr74, |
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18 amr_dhf_mr795, |
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19 amr_dhf_mr102, |
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20 amr_dhf_mr122 |
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21 }; |
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22 |
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23 int amr_check_dhf(const struct amr_param_frame *frame, int first_sub_only) |
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24 { |
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25 const Word16 *table; |
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26 Word16 nparam; |
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27 |
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28 if (frame->type != RX_SPEECH_GOOD) |
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29 return 0; |
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30 if ((frame->mode & 0x87) == 0x87) |
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31 table = amr_dhf_gsmefr; |
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32 else |
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33 table = dhf_per_mode[frame->mode & 7]; |
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34 if (first_sub_only) |
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35 nparam = prmnofsf[frame->mode & 7]; |
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36 else |
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37 nparam = prmno[frame->mode & 7]; |
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38 if (memcmp(frame->param, table, nparam * sizeof(int16_t))) |
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39 return 0; |
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40 else |
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41 return 1; |
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42 } |