| 1 | //fader.h: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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| 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | * NOTE for everyone want's to change something and send patches: |
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| 24 | * read README and HACKING! There a addition information on |
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| 25 | * the license of this document you need to read before you send |
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| 26 | * any patches. |
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| 27 | * |
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| 28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 29 | * or libpulse*: |
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| 30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 31 | * and are therefore GPL. Because of this it may be illigal to use |
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| 32 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 33 | */ |
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| 34 | |
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| 35 | #ifndef _LIBROARDSP_FADER_H_ |
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| 36 | #define _LIBROARDSP_FADER_H_ |
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| 37 | |
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| 38 | #include "libroardsp.h" |
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| 39 | |
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| 40 | #define ROAR_FADER_MAX_COEFF 4 |
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| 41 | |
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| 42 | struct roar_fader_state { |
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| 43 | int rate; |
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| 44 | size_t pcmoffset; |
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| 45 | size_t start; |
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| 46 | size_t stop; |
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| 47 | float poly[ROAR_FADER_MAX_COEFF]; |
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| 48 | int coeff; |
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| 49 | }; |
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| 50 | |
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| 51 | int roar_fader_init(struct roar_fader_state * state, float * poly, int coeff); |
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| 52 | int roar_fader_set_rate(struct roar_fader_state * state, int rate); |
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| 53 | int roar_fader_set_startstop(struct roar_fader_state * state, ssize_t start, ssize_t stop); |
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| 54 | |
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| 55 | int roar_fader_calcpcm_i16n(struct roar_fader_state * state, int16_t * data, size_t frames, int channels); |
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| 56 | int roar_fader_calcpcm_i161(struct roar_fader_state * state, int16_t * data, size_t frames); |
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| 57 | |
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| 58 | #endif |
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| 59 | |
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| 60 | //ll |
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