49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2006 by Nicolas Pitre <nico@cam.org>
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* Copyright (C) 2006-2007 by Stéphane Doyon <s.doyon@videotron.ca>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef _TDSPEED_H
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#define _TDSPEED_H
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#include "dsp.h"
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#define TDSPEED_OUTBUFSIZE 4096
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/* some #define functions to get the pitch, stretch and speed values based on */
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/* two known values. Remember that params are alphabetical. */
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#define GET_SPEED(pitch, stretch) \
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((pitch * stretch + PITCH_SPEED_100 / 2L) / PITCH_SPEED_100)
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#define GET_PITCH(speed, stretch) \
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((speed * PITCH_SPEED_100 + stretch / 2L) / stretch)
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#define GET_STRETCH(pitch, speed) \
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((speed * PITCH_SPEED_100 + pitch / 2L) / pitch)
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void tdspeed_init(void) INIT_ATTR;
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bool tdspeed_config(int samplerate, bool stereo, int32_t factor);
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long tdspeed_est_output_size(void);
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long tdspeed_est_input_size(long size);
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int tdspeed_doit(int32_t *src[], int count);
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#define STRETCH_MAX (250L * PITCH_SPEED_PRECISION) /* 250% */
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#define STRETCH_MIN (35L * PITCH_SPEED_PRECISION) /* 35% */
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#endif
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