FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/enc_lag3.h @ 477:4c9222d95647

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
libtwamr encoder: always emit frame->mode = mode; In the original implementation of amr_encode_frame(), the 'mode' member of the output struct was set to 0xFF if the output frame type is TX_NO_DATA. This design was made to mimic the mode field (16-bit word) being set to 0xFFFF (or -1) in 3GPP test sequence format - but nothing actually depends on this struct member being set in any way, and amr_frame_to_tseq() generates the needed 0xFFFF on its own, based on frame->type being equal to TX_NO_DATA. It is simpler and more efficient to always set frame->mode to the actual encoding mode in amr_encode_frame(), and this new behavior has already been documented in doc/AMR-library-API description in anticipation of the present change.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 18 May 2024 22:30:42 +0000
parents 0349de7c45b7
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
363
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : enc_lag3.h
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : Encoding of fractional pitch lag with 1/3 resolution.
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 *
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 ********************************************************************************
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 #ifndef enc_lag3_h
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 #define enc_lag3_h "$Id $"
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 /*
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 ********************************************************************************
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 * INCLUDE FILES
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 ********************************************************************************
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 #include "typedef.h"
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 /*
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 ********************************************************************************
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 * DEFINITION OF DATA TYPES
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 ********************************************************************************
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 /*
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 ********************************************************************************
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 * DECLARATION OF PROTOTYPES
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 ********************************************************************************
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 Word16
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 Enc_lag3( /* o : Return index of encoding */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 Word16 T0, /* i : Pitch delay */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 Word16 T0_frac, /* i : Fractional pitch delay */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 Word16 T0_prev, /* i : Integer pitch delay of last subframe */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 Word16 T0_min, /* i : minimum of search range */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 Word16 T0_max, /* i : maximum of search range */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 Word16 delta_flag, /* i : Flag for 1st (or 3rd) subframe */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 Word16 flag4 /* i : Flag for encoding with 4 bits */
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 );
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46
0349de7c45b7 libtwamr: integrate enc_lag[36].c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 #endif