FreeCalypso > hg > gsm-codec-lib
annotate libgsmfr2/pp_good.c @ 354:e4ce7972737f
libtwamr: add DHF tables
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sun, 05 May 2024 21:34:23 +0000 |
parents | 573afa985df6 |
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libgsmfrp: implement handling of good frames
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1 /* |
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2 * In this module we implement preprocessing of received 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 "tw_gsmfr.h" |
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8 #include "pp_state.h" |
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9 #include "pp_internal.h" |
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10 |
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11 void gsmfr_preproc_good_frame(struct gsmfr_preproc_state *st, uint8_t *frame) |
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12 { |
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13 int sid; |
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14 |
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15 /* always set correct magic */ |
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16 frame[0] = 0xD0 | frame[0] & 0x0F; |
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17 /* now classify by SID */ |
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18 sid = gsmfr_preproc_sid_classify(frame); |
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19 switch (sid) { |
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20 case 0: /* good speech frame */ |
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21 st->rx_state = SPEECH; |
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22 memcpy(&st->speech_frame, frame, GSMFR_RTP_FRAME_LEN); |
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23 return; |
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24 case 1: /* invalid SID frame */ |
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25 /* state-dependent handling, similar to BFI */ |
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26 gsmfr_preproc_invalid_sid(st, frame); |
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27 return; |
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28 case 2: /* valid SID frame */ |
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29 st->rx_state = COMFORT_NOISE; |
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30 gsmfr_preproc_sid2cn(st, frame); |
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31 return; |
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32 } |
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33 } |