| Benny Prijono | 7f1c90f | 2007-04-07 12:29:46 +0000 | [diff] [blame] | 1 | .\" |
| 2 | .\" Copyright 1992 by Jutta Degener and Carsten Bormann, Technische |
| 3 | .\" Universitaet Berlin. See the accompanying file "COPYRIGHT" for |
| 4 | .\" details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE. |
| 5 | .\" |
| 6 | .PU |
| 7 | .TH GSM_PRINT 3 |
| 8 | .SH NAME |
| 9 | gsm_print \(em GSM\ 06.10 supplementary function for debugging |
| 10 | .SH SYNOPSIS |
| 11 | #include "gsm.h" |
| 12 | #include <stdio.h> |
| 13 | |
| 14 | int gsm_print(f, g, frame); |
| 15 | .br |
| 16 | FILE * f; |
| 17 | .br |
| 18 | gsm g; |
| 19 | .br |
| 20 | gsm_frame frame; |
| 21 | .SH "DESCRIPTION" |
| 22 | Gsm is an implementation of the final draft GSM 06.10 |
| 23 | standard for full-rate speech transcoding, a lossy |
| 24 | speech compression algorithm. |
| 25 | The compressed form involves 76 variables with different numbers |
| 26 | of significant bits packed into 33 bytes. |
| 27 | .PP |
| 28 | If you are interested in investigating the details of this |
| 29 | coding scheme, gsm_print() can be used to dump the contents |
| 30 | of individual gsm_frames to a file pointer provided by |
| 31 | the application. |
| 32 | .PP |
| 33 | .SH "RETURN VALUE" |
| 34 | gsm_print() returns -1 if the frame is invalid, else 0. |
| 35 | .SH EXAMPLE |
| 36 | A single frame looks like this: |
| 37 | .br |
| 38 | .nf |
| 39 | LARc: 29 32 20 11 08 05 06 07 |
| 40 | #1: Nc 0040 bc 0 Mc 1 xmaxc 60 |
| 41 | 06 04 00 03 03 06 04 02 02 04 05 04 01 |
| 42 | #2: Nc 0045 bc 1 Mc 1 xmaxc 48 |
| 43 | 03 07 01 03 04 04 07 01 03 02 04 05 03 |
| 44 | #3: Nc 0091 bc 1 Mc 1 xmaxc 46 |
| 45 | 00 03 03 07 01 06 02 04 05 03 03 02 04 |
| 46 | #4: Nc 0120 bc 0 Mc 1 xmaxc 47 |
| 47 | 07 03 06 00 03 03 06 05 00 03 02 07 04 |
| 48 | .nf |
| 49 | .SH BUGS |
| 50 | Please direct bug reports to jutta@cs.tu-berlin.de and cabo@cs.tu-berlin.de. |
| 51 | .SH "SEE ALSO" |
| 52 | gsm(3), gsm_explode(3) |