private/time_scale.h
/*
* 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.
*/
#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 ------------------------------------------------------------*/
time_scale_state_s
Definition private/time_scale.h:36