Mercurial > hg > audiostuff
comparison spandsp-0.0.6pre17/src/spandsp/private/time_scale.h @ 4:26cd8f1ef0b1
import spandsp-0.0.6pre17
author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
---|---|
date | Fri, 25 Jun 2010 15:50:58 +0200 |
parents | |
children |
comparison
equal
deleted
inserted
replaced
3:c6c5a16ce2f2 | 4:26cd8f1ef0b1 |
---|---|
1 /* | |
2 * SpanDSP - a series of DSP components for telephony | |
3 * | |
4 * private/time_scale.h - Time scaling for linear speech data | |
5 * | |
6 * Written by Steve Underwood <steveu@coppice.org> | |
7 * | |
8 * Copyright (C) 2004 Steve Underwood | |
9 * | |
10 * All rights reserved. | |
11 * | |
12 * This program is free software; you can redistribute it and/or modify | |
13 * it under the terms of the GNU Lesser General Public License version 2.1, | |
14 * as published by the Free Software Foundation. | |
15 * | |
16 * This program is distributed in the hope that it will be useful, | |
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 * GNU Lesser General Public License for more details. | |
20 * | |
21 * You should have received a copy of the GNU Lesser General Public | |
22 * License along with this program; if not, write to the Free Software | |
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 * | |
25 * $Id: time_scale.h,v 1.1 2008/11/15 14:27:29 steveu Exp $ | |
26 */ | |
27 | |
28 #if !defined(_SPANDSP_PRIVATE_TIME_SCALE_H_) | |
29 #define _SPANDSP_PRIVATE_TIME_SCALE_H_ | |
30 | |
31 #define TIME_SCALE_MAX_SAMPLE_RATE 48000 | |
32 #define TIME_SCALE_MIN_PITCH 60 | |
33 #define TIME_SCALE_MAX_PITCH 250 | |
34 #define TIME_SCALE_BUF_LEN (2*TIME_SCALE_MAX_SAMPLE_RATE/TIME_SCALE_MIN_PITCH) | |
35 | |
36 /*! Audio time scaling descriptor. */ | |
37 struct time_scale_state_s | |
38 { | |
39 int sample_rate; | |
40 int min_pitch; | |
41 int max_pitch; | |
42 int buf_len; | |
43 float playout_rate; | |
44 double rcomp; | |
45 double rate_nudge; | |
46 int fill; | |
47 int lcp; | |
48 int16_t buf[TIME_SCALE_BUF_LEN]; | |
49 }; | |
50 | |
51 #endif | |
52 /*- End of file ------------------------------------------------------------*/ |