| 1 | //filter_add.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2011 |
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| 5 | * |
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| 6 | * This file is part of libroardsp 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 | * libroardsp 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, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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| 23 | * |
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| 24 | */ |
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| 25 | |
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| 26 | #include "libroardsp.h" |
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| 27 | |
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| 28 | int roardsp_add_init (struct roardsp_filter * filter, struct roar_stream * stream, int id) { |
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| 29 | struct roardsp_amp * self = roar_mm_malloc(sizeof(struct roardsp_amp)); |
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| 30 | |
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| 31 | if ( self == NULL ) |
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| 32 | return -1; |
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| 33 | |
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| 34 | memset(self, 0, sizeof(struct roardsp_amp)); |
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| 35 | |
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| 36 | filter->inst = (void*) self; |
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| 37 | |
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| 38 | roardsp_filter_reset(filter, ROARDSP_RESET_FULL); |
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| 39 | |
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| 40 | return 0; |
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| 41 | } |
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| 42 | |
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| 43 | int roardsp_add_calc16 (struct roardsp_filter * filter, void * data, size_t samples) { |
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| 44 | struct roardsp_amp * self = (struct roardsp_amp *) filter->inst; |
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| 45 | int16_t * samp = (int16_t *) data; |
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| 46 | size_t i; |
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| 47 | |
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| 48 | for (i = 0; i < samples; i++) { |
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| 49 | samp[i] += self->mul / self->div; |
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| 50 | }; |
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| 51 | |
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| 52 | return 0; |
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| 53 | } |
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| 54 | |
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| 55 | int roardsp_add_reset (struct roardsp_filter * filter, int what) { |
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| 56 | struct roardsp_amp * self; |
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| 57 | |
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| 58 | if ( filter == NULL ) |
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| 59 | return -1; |
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| 60 | |
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| 61 | if ( filter->inst == NULL ) |
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| 62 | return -1; |
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| 63 | |
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| 64 | self = filter->inst; |
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| 65 | |
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| 66 | switch (what) { |
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| 67 | case ROARDSP_RESET_NONE: |
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| 68 | case ROARDSP_RESET_STATE: |
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| 69 | return 0; |
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| 70 | break; |
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| 71 | case ROARDSP_RESET_FULL: |
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| 72 | self->mul = 0; |
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| 73 | self->div = 1; |
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| 74 | return 0; |
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| 75 | break; |
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| 76 | default: |
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| 77 | return -1; |
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| 78 | } |
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| 79 | |
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| 80 | return -1; |
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| 81 | } |
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| 82 | |
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| 83 | //ll |
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