Mercurial > hg > audiostuff
view 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> |
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date | Fri, 25 Jun 2010 15:50:58 +0200 |
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/* * SpanDSP - a series of DSP components for telephony * * private/time_scale.h - Time scaling for linear speech data * * Written by Steve Underwood <steveu@coppice.org> * * Copyright (C) 2004 Steve Underwood * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License version 2.1, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * $Id: time_scale.h,v 1.1 2008/11/15 14:27:29 steveu Exp $ */ #if !defined(_SPANDSP_PRIVATE_TIME_SCALE_H_) #define _SPANDSP_PRIVATE_TIME_SCALE_H_ #define TIME_SCALE_MAX_SAMPLE_RATE 48000 #define TIME_SCALE_MIN_PITCH 60 #define TIME_SCALE_MAX_PITCH 250 #define TIME_SCALE_BUF_LEN (2*TIME_SCALE_MAX_SAMPLE_RATE/TIME_SCALE_MIN_PITCH) /*! Audio time scaling descriptor. */ struct time_scale_state_s { int sample_rate; int min_pitch; int max_pitch; int buf_len; float playout_rate; double rcomp; double rate_nudge; int fill; int lcp; int16_t buf[TIME_SCALE_BUF_LEN]; }; #endif /*- End of file ------------------------------------------------------------*/