FreeCalypso > hg > gsm-codec-lib
annotate libgsmefr/enc_main.c @ 150:da17c7f02c6c
gsmefr-etsi-dec: add BE support
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 14 Dec 2022 22:04:39 +0000 |
parents | 035424a6ca83 |
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1 /* |
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2 * This module contains our GSM EFR encoder main function, EFR_encode_params(), |
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3 * that stands at the boundary between our public interface and the guts of |
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4 * ETSI-based codec. |
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5 */ |
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6 |
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7 #include "gsm_efr.h" |
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8 #include "typedef.h" |
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9 #include "namespace.h" |
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10 #include "basic_op.h" |
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11 #include "cnst.h" |
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12 #include "codec.h" |
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13 #include "sig_proc.h" |
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14 #include "memops.h" |
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15 #include "enc_state.h" |
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16 #include "e_homing.h" |
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17 #include "dtx.h" |
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18 |
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19 void EFR_encode_params(struct EFR_encoder_state *st, const int16_t *pcm_in, |
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20 int16_t *params, int *sp_out, int *vad_out) |
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21 { |
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22 Word16 *new_speech = st->old_speech + L_TOTAL - L_FRAME; |
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23 Word16 syn[L_FRAME]; |
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24 Word16 reset_flag; |
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25 Word16 i; |
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26 |
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27 /* Check whether this frame is an encoder homing frame */ |
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28 reset_flag = encoder_homing_frame_test (pcm_in); |
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29 |
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30 for (i = 0; i < L_FRAME; i++) /* Delete the 3 LSBs (13-bit input) */ |
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31 { |
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32 new_speech[i] = pcm_in[i] & 0xfff8; |
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33 } |
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34 |
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35 Pre_Process (st, new_speech, L_FRAME); /* filter + downscaling */ |
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36 |
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37 Coder_12k2 (st, params, syn); /* Find speech parameters */ |
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38 |
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39 if ((st->txdtx_ctrl & TX_SP_FLAG) == 0) |
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40 { |
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41 /* Write comfort noise parameters into the parameter frame. |
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42 Use old parameters in case SID frame is not to be updated */ |
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43 CN_encoding (st, params, st->txdtx_ctrl); |
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44 } |
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45 |
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46 /* VAD and SP flag outputs */ |
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47 if (vad_out) |
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48 *vad_out = ((st->txdtx_ctrl & TX_VAD_FLAG) != 0); |
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49 |
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50 if (sp_out) |
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51 *sp_out = ((st->txdtx_ctrl & TX_SP_FLAG) != 0); |
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52 |
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53 if (reset_flag != 0) |
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54 { |
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55 /* Bring the encoder, VAD and DTX to the home state */ |
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56 EFR_encoder_reset(st, st->dtx_mode); |
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57 } |
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58 } |