audiostuff: spandsp-0.0.6pre17/src/time

author	Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date	Fri, 25 Jun 2010 15:50:58 +0200
parents
children

rev	line source
4 26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	1 /*
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	2 * SpanDSP - a series of DSP components for telephony
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	3 *
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	4 * time_scale.c - Time scaling for linear speech data
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	5 *
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	6 * Written by Steve Underwood <steveu@coppice.org>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	7 *
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	8 * Copyright (C) 2004 Steve Underwood
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	9 *
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	10 * All rights reserved.
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	11 *
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	12 * This program is free software; you can redistribute it and/or modify
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	13 * it under the terms of the GNU Lesser General Public License version 2.1,
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	14 * as published by the Free Software Foundation.
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	15 *
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	16 * This program is distributed in the hope that it will be useful,
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	19 * GNU Lesser General Public License for more details.
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	20 *
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	21 * You should have received a copy of the GNU Lesser General Public
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	22 * License along with this program; if not, write to the Free Software
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	24 *
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	25 * $Id: time_scale.c,v 1.30 2009/02/10 13:06:47 steveu Exp $
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	26 */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	27
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	28 /! \file /
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	29
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	30 #if defined(HAVE_CONFIG_H)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	31 #include "config.h"
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	32 #endif
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	33
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	34 #include <stdlib.h>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	35 #include <stdio.h>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	36 #include <inttypes.h>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	37 #include <string.h>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	38 #include <fcntl.h>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	39 #include <time.h>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	40 #include <limits.h>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	41 #if defined(HAVE_TGMATH_H)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	42 #include <tgmath.h>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	43 #endif
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	44 #if defined(HAVE_MATH_H)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	45 #include <math.h>
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	46 #endif
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	47 #include "floating_fudge.h"
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	48
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	49 #include "spandsp/telephony.h"
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	50 #include "spandsp/fast_convert.h"
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	51 #include "spandsp/time_scale.h"
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	52 #include "spandsp/saturated.h"
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	53
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	54 #include "spandsp/private/time_scale.h"
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	55
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	56 /*
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	57 Time scaling for speech, based on the Pointer Interval Controlled
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	58 OverLap and Add (PICOLA) method, developed by Morita Naotaka.
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	59 */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	60
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	61 static __inline__ int amdf_pitch(int min_pitch, int max_pitch, int16_t amp[], int len)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	62 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	63 int i;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	64 int j;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	65 int acc;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	66 int min_acc;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	67 int pitch;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	68
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	69 pitch = min_pitch;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	70 min_acc = INT_MAX;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	71 for (i = max_pitch; i <= min_pitch; i++)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	72 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	73 acc = 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	74 for (j = 0; j < len; j++)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	75 acc += abs(amp[i + j] - amp[j]);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	76 if (acc < min_acc)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	77 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	78 min_acc = acc;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	79 pitch = i;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	80 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	81 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	82 return pitch;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	83 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	84 /- End of function --------------------------------------------------------/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	85
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	86 static __inline__ void overlap_add(int16_t amp1[], int16_t amp2[], int len)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	87 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	88 int i;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	89 float weight;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	90 float step;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	91
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	92 step = 1.0f/len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	93 weight = 0.0f;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	94 for (i = 0; i < len; i++)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	95 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	96 /* TODO: saturate */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	97 amp2[i] = (int16_t) ((float) amp1[i](1.0f - weight) + (float) amp2[i]weight);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	98 weight += step;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	99 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	100 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	101 /- End of function --------------------------------------------------------/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	102
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	103 SPAN_DECLARE(int) time_scale_rate(time_scale_state_t *s, float playout_rate)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	104 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	105 if (playout_rate <= 0.0f)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	106 return -1;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	107 /endif/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	108 if (playout_rate >= 0.99f && playout_rate <= 1.01f)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	109 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	110 /* Treat rate close to normal speed as exactly normal speed, and
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	111 avoid divide by zero, and other numerical problems. */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	112 playout_rate = 1.0f;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	113 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	114 else if (playout_rate < 1.0f)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	115 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	116 s->rcomp = playout_rate/(1.0f - playout_rate);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	117 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	118 else
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	119 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	120 s->rcomp = 1.0f/(playout_rate - 1.0f);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	121 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	122 /endif/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	123 s->playout_rate = playout_rate;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	124 return 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	125 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	126 /- End of function --------------------------------------------------------/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	127
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	128 SPAN_DECLARE(time_scale_state_t ) time_scale_init(time_scale_state_t s, int sample_rate, float playout_rate)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	129 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	130 int alloced;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	131
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	132 if (sample_rate > TIME_SCALE_MAX_SAMPLE_RATE)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	133 return NULL;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	134 alloced = FALSE;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	135 if (s == NULL)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	136 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	137 if ((s = (time_scale_state_t ) malloc(sizeof (s))) == NULL)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	138 return NULL;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	139 /endif/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	140 alloced = TRUE;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	141 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	142 /endif/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	143 s->sample_rate = sample_rate;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	144 s->min_pitch = sample_rate/TIME_SCALE_MIN_PITCH;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	145 s->max_pitch = sample_rate/TIME_SCALE_MAX_PITCH;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	146 s->buf_len = 2*sample_rate/TIME_SCALE_MIN_PITCH;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	147 if (time_scale_rate(s, playout_rate))
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	148 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	149 if (alloced)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	150 free(s);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	151 return NULL;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	152 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	153 /endif/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	154 s->rate_nudge = 0.0f;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	155 s->fill = 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	156 s->lcp = 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	157 return s;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	158 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	159 /- End of function --------------------------------------------------------/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	160
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	161 SPAN_DECLARE(int) time_scale_release(time_scale_state_t *s)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	162 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	163 return 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	164 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	165 /- End of function --------------------------------------------------------/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	166
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	167 SPAN_DECLARE(int) time_scale_free(time_scale_state_t *s)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	168 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	169 free(s);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	170 return 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	171 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	172 /- End of function --------------------------------------------------------/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	173
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	174 SPAN_DECLARE(int) time_scale(time_scale_state_t *s, int16_t out[], int16_t in[], int len)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	175 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	176 double lcpf;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	177 int pitch;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	178 int out_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	179 int in_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	180 int k;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	181
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	182 out_len = 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	183 in_len = 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	184
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	185 /* Top up the buffer */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	186 if (s->fill + len < s->buf_len)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	187 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	188 /* Cannot continue without more samples */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	189 memcpy(s->buf + s->fill, in, sizeof(int16_t)*len);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	190 s->fill += len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	191 return out_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	192 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	193 k = s->buf_len - s->fill;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	194 memcpy(s->buf + s->fill, in, sizeof(int16_t)*k);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	195 in_len += k;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	196 s->fill = s->buf_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	197 while (s->fill == s->buf_len)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	198 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	199 while (s->lcp >= s->buf_len)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	200 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	201 memcpy(out + out_len, s->buf, sizeof(int16_t)*s->buf_len);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	202 out_len += s->buf_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	203 if (len - in_len < s->buf_len)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	204 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	205 /* Cannot continue without more samples */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	206 memcpy(s->buf, in + in_len, sizeof(int16_t)*(len - in_len));
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	207 s->fill = len - in_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	208 s->lcp -= s->buf_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	209 return out_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	210 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	211 memcpy(s->buf, in + in_len, sizeof(int16_t)*s->buf_len);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	212 in_len += s->buf_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	213 s->lcp -= s->buf_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	214 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	215 if (s->lcp > 0)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	216 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	217 memcpy(out + out_len, s->buf, sizeof(int16_t)*s->lcp);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	218 out_len += s->lcp;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	219 memcpy(s->buf, s->buf + s->lcp, sizeof(int16_t)*(s->buf_len - s->lcp));
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	220 if (len - in_len < s->lcp)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	221 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	222 /* Cannot continue without more samples */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	223 memcpy(s->buf + (s->buf_len - s->lcp), in + in_len, sizeof(int16_t)*(len - in_len));
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	224 s->fill = s->buf_len - s->lcp + len - in_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	225 s->lcp = 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	226 return out_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	227 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	228 memcpy(s->buf + (s->buf_len - s->lcp), in + in_len, sizeof(int16_t)*s->lcp);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	229 in_len += s->lcp;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	230 s->lcp = 0;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	231 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	232 if (s->playout_rate == 1.0f)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	233 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	234 s->lcp = 0x7FFFFFFF;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	235 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	236 else
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	237 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	238 pitch = amdf_pitch(s->min_pitch, s->max_pitch, s->buf, s->min_pitch);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	239 lcpf = (double) pitch*s->rcomp;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	240 /* Nudge around to compensate for fractional samples */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	241 s->lcp = (int) lcpf;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	242 /* Note that s->lcp and lcpf are not the same, as lcpf has a fractional part, and s->lcp doesn't */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	243 s->rate_nudge += s->lcp - lcpf;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	244 if (s->rate_nudge >= 0.5f)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	245 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	246 s->lcp--;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	247 s->rate_nudge -= 1.0f;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	248 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	249 else if (s->rate_nudge <= -0.5f)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	250 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	251 s->lcp++;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	252 s->rate_nudge += 1.0f;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	253 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	254 if (s->playout_rate < 1.0f)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	255 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	256 /* Speed up - drop a chunk of data */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	257 overlap_add(s->buf, s->buf + pitch, pitch);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	258 memcpy(&s->buf[pitch], &s->buf[2pitch], sizeof(int16_t)(s->buf_len - 2*pitch));
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	259 if (len - in_len < pitch)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	260 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	261 /* Cannot continue without more samples */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	262 memcpy(s->buf + s->buf_len - pitch, in + in_len, sizeof(int16_t)*(len - in_len));
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	263 s->fill += (len - in_len - pitch);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	264 return out_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	265 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	266 memcpy(s->buf + s->buf_len - pitch, in + in_len, sizeof(int16_t)*pitch);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	267 in_len += pitch;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	268 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	269 else
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	270 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	271 /* Slow down - insert a chunk of data */
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	272 memcpy(out + out_len, s->buf, sizeof(int16_t)*pitch);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	273 out_len += pitch;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	274 overlap_add(s->buf + pitch, s->buf, pitch);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	275 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	276 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	277 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	278 return out_len;
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	279 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	280 /- End of function --------------------------------------------------------/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	281
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	282 SPAN_DECLARE(int) time_scale_max_output_len(time_scale_state_t *s, int input_len)
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	283 {
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	284 return (int) (input_len*s->playout_rate + s->min_pitch + 1);
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	285 }
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	286 /- End of function --------------------------------------------------------/
26cd8f1ef0b1 import spandsp-0.0.6pre17 Peter Meerwald <pmeerw@cosy.sbg.ac.at> parents: diff changeset	287 /- End of file ------------------------------------------------------------/

4

26cd8f1ef0b1 import spandsp-0.0.6pre17