dbc223eb84
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123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*(LGPL)
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---------------------------------------------------------------------------
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a_delay.h - Feedback delay w/ LP filter
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---------------------------------------------------------------------------
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* Copyright (C) 2001, David Olofson
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _A_DELAY_H_
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#define _A_DELAY_H_
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#include "a_plugin.h"
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typedef enum
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{
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/*
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* Uniform parameters.
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*
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*
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*/
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DC_EARLY_TIME = FXC_PARAM_1, /* Early Reflections Time Scale */
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DC_TAIL_TIME = FXC_PARAM_2, /* Tail Time Scale */
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/*TODO:*/ DC_EARLY_LEVEL = FXC_PARAM_3, /* Early Reflections Level */
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/*TODO:*/ DC_FEEDBACK = FXC_PARAM_4, /* Tail Feedback Level */
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DC_LP_FILTER = FXC_PARAM_5, /* Feedback LP Filter Cutoff */
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/*
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* Early reflection taps.
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*
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* Times are in ms, 16:16 fixp, and levels are in the
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* usual 16:16 fixp format, where 1.0 [65536] is unity
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* gain.
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*
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* Note that there is an implicit "tap 0" that always
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* taps at full level directly from the tail feedback
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* signal as it's sent back into the delay buffer. That
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* is, using only tail feedback taps still results in
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* an effect - more specifically, a multi tap feedback
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* delay.
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*
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* (Tech note: In lower quality modes, taps can be
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* grouped according to level, or even scaled down to
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* the nearest power-of-two values for speed.)
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*/
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DC_EARLY_TAP_1_TIME = FXC_USER,
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DC_EARLY_TAP_1_LEVEL,
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DC_EARLY_TAP_2_TIME,
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DC_EARLY_TAP_2_LEVEL,
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DC_EARLY_TAP_3_TIME,
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DC_EARLY_TAP_3_LEVEL,
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DC_EARLY_TAP_4_TIME,
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DC_EARLY_TAP_4_LEVEL,
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DC_EARLY_TAP_5_TIME,
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DC_EARLY_TAP_5_LEVEL,
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DC_EARLY_TAP_6_TIME,
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DC_EARLY_TAP_6_LEVEL,
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DC_EARLY_TAP_7_TIME,
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DC_EARLY_TAP_7_LEVEL,
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DC_EARLY_TAP_8_TIME,
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DC_EARLY_TAP_8_LEVEL,
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DC_EARLY_TAP_9_TIME,
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DC_EARLY_TAP_9_LEVEL,
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DC_EARLY_TAP_10_TIME,
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DC_EARLY_TAP_10_LEVEL,
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DC_EARLY_TAP_11_TIME,
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DC_EARLY_TAP_11_LEVEL,
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DC_EARLY_TAP_12_TIME,
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DC_EARLY_TAP_12_LEVEL,
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DC_EARLY_TAP_13_TIME,
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DC_EARLY_TAP_13_LEVEL,
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DC_EARLY_TAP_14_TIME,
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DC_EARLY_TAP_14_LEVEL,
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DC_EARLY_TAP_15_TIME,
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DC_EARLY_TAP_15_LEVEL,
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DC_EARLY_TAP_16_TIME,
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DC_EARLY_TAP_16_LEVEL,
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/*
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* Tail feedback taps.
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*
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* These work like the early reflection taps, but the
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* resulting signal is LP filtered and sent back into
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* the start of the delay buffer, together with the
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* input signal.
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*/
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DC_TAIL_TAP_1_TIME,
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DC_TAIL_TAP_1_LEVEL,
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DC_TAIL_TAP_2_TIME,
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DC_TAIL_TAP_2_LEVEL,
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DC_TAIL_TAP_3_TIME,
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DC_TAIL_TAP_3_LEVEL,
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DC_TAIL_TAP_4_TIME,
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DC_TAIL_TAP_4_LEVEL,
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DC_TAIL_TAP_5_TIME,
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DC_TAIL_TAP_5_LEVEL,
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DC_TAIL_TAP_6_TIME,
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DC_TAIL_TAP_6_LEVEL,
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DC_TAIL_TAP_7_TIME,
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DC_TAIL_TAP_7_LEVEL,
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DC_TAIL_TAP_8_TIME,
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DC_TAIL_TAP_8_LEVEL,
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DC_COUNT
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} delay_controls_t;
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void delay_init(struct audio_plugin_t *p);
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#endif /*_A_DELAY_H_*/
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