FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/graytab.c @ 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 675597e63fd8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
317
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : gray.tab
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : gray encoding and decoding tables
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 * $Id $
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 *
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 *
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 ********************************************************************************
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 */
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 #include "namespace.h"
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 #include "typedef.h"
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 #include "graytab.h"
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 const Word16 gray[8] = {0, 1, 3, 2, 6, 4, 5, 7};
675597e63fd8 libtwamr: integrate gray.tab, convert to intermodule linkage
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 const Word16 dgray[8] = {0, 1, 3, 2, 5, 6, 4, 7};