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