FreeCalypso > hg > gsm-codec-lib

annotate libtwamr/c1035pf.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 6fd6c5fc1aa4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
318
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 ********************************************************************************
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * R99 Version 3.3.0
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 * REL-4 Version 4.1.0
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 *
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 ********************************************************************************
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 *
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * File : c1035pf.h
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 * Purpose : Searches a 35 bit algebraic codebook containing
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 * : 10 pulses in a frame of 40 samples.
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 *
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 ********************************************************************************
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 #ifndef c1035pf_h
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 #define c1035pf_h "$Id $"
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 /*
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 ********************************************************************************
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 * INCLUDE FILES
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 ********************************************************************************
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 #include "typedef.h"
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 /*
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 ********************************************************************************
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 * DEFINITION OF DATA TYPES
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 ********************************************************************************
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 /*
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 ********************************************************************************
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 * DECLARATION OF PROTOTYPES
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 ********************************************************************************
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 void code_10i40_35bits (
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 Word16 x[], /* (i) : target vector */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 Word16 cn[], /* (i) : residual after long term prediction */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 Word16 h[], /* (i) : impulse response of weighted synthesis
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 filter */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 Word16 cod[], /* (o) : algebraic (fixed) codebook excitation */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 Word16 y[], /* (o) : filtered fixed codebook excitation */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 Word16 indx[] /* (o) : index of 10 pulses (sign + position) */
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 );
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46
6fd6c5fc1aa4 libtwamr: integrate c1035pf.c
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 #endif