FreeCalypso > hg > gsm-codec-lib

annotate doc/AMR-library-tests @ 534:516e84085a15

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
libgsmfr2 is now at version 2.1.0
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 20 Sep 2024 00:17:35 +0000
parents cc0c244bd233
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
481
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 The present suite includes a pair of command line programs that exercise
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 libtwamr encoder and decoder in 3GPP test sequence format, allowing this library
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 to be tested against the official test sequences of 3GPP TS 26.074.
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 twamr-tseq-enc
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 ==============
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 This program reads a *.inp file from the collection of TS 26.074, encodes it
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 per selected AMR mode using libtwamr functions, and emits the encoder output in
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 3GPP-defined .cod format. The command line structure of twamr-tseq-enc is as
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 follows:
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 twamr-tseq-enc [-d] [-2] input.inp mode output.cod
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 The middle argument specifies the codec mode to be used; there is no default.
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 Ordinarily the mode argument is one of these 8 keywords:
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 MR475
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 MR515
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 MR59
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 MR67
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 MR74
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 MR795
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 MR102
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 MR122
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 However, this mode argument can also take the form of "file:$modefile", where
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 $modefile is an ASCII text file giving one of the above mode keywords per line.
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 This form is needed when testing the encoding of t21.inp per t21.mod control
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 file.
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 twamr-tseq-enc flag options: -d enables DTX, -2 switches the VAD algorithm from
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 VAD1 default to VAD2 alternative. The two options can be combined as -d2.
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 twamr-tseq-dec
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 ==============
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 This program reads a *.cod file in 3GPP AMR test sequence format, decodes it
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 using libtwamr functions, and emits the decoder output in a raw PCM *.out file.
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 The command line structure of twamr-tseq-dec is as follows:
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 twamr-tseq-dec [-r] input.cod output.out
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 By default the first word of each *.cod frame is expected to be a Tx frame type
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 as in enum TXFrameType; with -r option this first word is expected to be an Rx
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 frame type as in enum RXFrameType instead. This option directly corresponds to
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 -rxframetype in the reference decoder program from 3GPP.
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 Byte order considerations
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 =========================
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 Both twamr-tseq-enc and twamr-tseq-dec read and write their input and output
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 files (16-bit linear PCM on one end and 3GPP *.cod test sequence format on the
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 other end) in the local machine's native byte order. 3GPP shipped their
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 TS 26.074 collection of AMR test sequences in little-endian byte order; given
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 that most GSM software developers are now largely forced by economic pressures
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 to work on x86 or ARM architecture machines rather than more noble SPARC or
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 PowerPC systems, the local byte order of the developer's machine will typically
cc0c244bd233 doc/AMR-library-tests: new article
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 be LE, matching TS 26.074 files as published.