FreeCalypso > hg > gsm-codec-lib

annotate libgsmefr/enc_main.c @ 282:9ee8ad3d4d30

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frtest: rm gsmfr-hand-test and gsmfr-max-out utils These hack programs were never properly documented and were written only as part of a debug chase, in pursuit of a bug that ultimately turned out to be in our then-hacky patch to osmo-bts-sysmo, before beginning of proper patches in Osmocom. These hack programs need to be dropped from the present sw package because they depend on old libgsm, and we are eliminating that dependency.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 14 Apr 2024 05:44:47 +0000
parents 035424a6ca83
children
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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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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 }