FreeCalypso > hg > gsm-codec-lib

annotate libgsmefr/enc_main.c @ 153:14b627682458

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
gsmfr-decode-r utility put together
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 14 Dec 2022 23:11:20 +0000
parents 035424a6ca83
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
112
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * This module contains our GSM EFR encoder main function, EFR_encode_params(),
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * that stands at the boundary between our public interface and the guts of
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * ETSI-based codec.
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 */
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include "gsm_efr.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include "typedef.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include "namespace.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include "basic_op.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include "cnst.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 #include "codec.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 #include "sig_proc.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 #include "memops.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 #include "enc_state.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 #include "e_homing.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 #include "dtx.h"
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 void EFR_encode_params(struct EFR_encoder_state *st, const int16_t *pcm_in,
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 int16_t *params, int *sp_out, int *vad_out)
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 {
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 Word16 *new_speech = st->old_speech + L_TOTAL - L_FRAME;
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 Word16 syn[L_FRAME];
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 Word16 reset_flag;
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 Word16 i;
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 /* Check whether this frame is an encoder homing frame */
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 reset_flag = encoder_homing_frame_test (pcm_in);
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 for (i = 0; i < L_FRAME; i++) /* Delete the 3 LSBs (13-bit input) */
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 {
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 new_speech[i] = pcm_in[i] & 0xfff8;
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 }
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 Pre_Process (st, new_speech, L_FRAME); /* filter + downscaling */
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 Coder_12k2 (st, params, syn); /* Find speech parameters */
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 if ((st->txdtx_ctrl & TX_SP_FLAG) == 0)
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 {
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 /* Write comfort noise parameters into the parameter frame.
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 Use old parameters in case SID frame is not to be updated */
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 CN_encoding (st, params, st->txdtx_ctrl);
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 }
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 /* VAD and SP flag outputs */
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 if (vad_out)
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 *vad_out = ((st->txdtx_ctrl & TX_VAD_FLAG) != 0);
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 if (sp_out)
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 *sp_out = ((st->txdtx_ctrl & TX_SP_FLAG) != 0);
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 if (reset_flag != 0)
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 {
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 /* Bring the encoder, VAD and DTX to the home state */
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 EFR_encoder_reset(st, st->dtx_mode);
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 }
035424a6ca83 libgsmefr: encoder main function put together
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 }