FreeCalypso > hg > gsm-codec-lib
annotate libgsmfrp/good_frame.c @ 260:f0220c141d2c
libgsmfr2: implement gsmfr_unpack_frame()
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 12 Apr 2024 23:09:23 +0000 |
parents | f081a6850fb5 |
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rev | line source |
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libgsmfrp: implement handling of good frames
Mychaela Falconia <falcon@freecalypso.org>
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1 /* |
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2 * In this module we implement preprocessing of received good frames. |
4812e00bc100
libgsmfrp: implement handling of good frames
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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 "gsm_fr_preproc.h" |
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8 #include "internal.h" |
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9 |
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10 void gsmfr_preproc_good_frame(struct gsmfr_preproc_state *st, gsm_byte *frame) |
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11 { |
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12 int sid; |
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13 |
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14 /* always set correct magic */ |
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15 frame[0] = 0xD0 | frame[0] & 0x0F; |
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16 /* now classify by SID */ |
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17 sid = gsmfr_preproc_sid_classify(frame); |
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18 switch (sid) { |
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19 case 0: /* good speech frame */ |
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20 st->rx_state = SPEECH; |
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21 memcpy(&st->speech_frame, frame, sizeof(gsm_frame)); |
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22 return; |
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23 case 1: /* invalid SID frame */ |
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24 /* state-dependent handling, similar to BFI */ |
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25 gsmfr_preproc_invalid_sid(st, frame); |
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26 return; |
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27 case 2: /* valid SID frame */ |
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28 st->rx_state = COMFORT_NOISE; |
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29 gsmfr_preproc_sid2cn(st, frame); |
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30 return; |
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31 } |
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32 } |