1 | //add.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - December 2008 |
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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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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22 | * |
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23 | */ |
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24 | |
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25 | #include "libroardsp.h" |
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26 | |
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27 | int roardsp_add_init (struct roardsp_filter * filter, struct roar_stream * stream, int id) { |
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28 | struct roardsp_amp * self = malloc(sizeof(struct roardsp_amp)); |
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29 | |
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30 | if ( self == NULL ) |
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31 | return -1; |
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32 | |
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33 | memset(self, 0, sizeof(struct roardsp_amp)); |
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34 | |
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35 | filter->inst = (void*) self; |
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36 | |
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37 | roardsp_filter_reset(filter, ROARDSP_RESET_FULL); |
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38 | |
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39 | return 0; |
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40 | } |
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41 | |
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42 | int roardsp_add_calc16 (struct roardsp_filter * filter, void * data, size_t samples) { |
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43 | struct roardsp_amp * self = (struct roardsp_amp *) filter->inst; |
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44 | int16_t * samp = (int16_t *) data; |
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45 | size_t i; |
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46 | |
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47 | for (i = 0; i < samples; i++) { |
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48 | samp[i] += self->mul / self->div; |
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49 | }; |
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50 | |
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51 | return 0; |
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52 | } |
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53 | |
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54 | int roardsp_add_reset (struct roardsp_filter * filter, int what) { |
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55 | struct roardsp_amp * self; |
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56 | |
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57 | if ( filter == NULL ) |
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58 | return -1; |
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59 | |
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60 | if ( filter->inst == NULL ) |
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61 | return -1; |
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62 | |
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63 | self = filter->inst; |
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64 | |
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65 | switch (what) { |
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66 | case ROARDSP_RESET_NONE: |
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67 | case ROARDSP_RESET_STATE: |
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68 | return 0; |
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69 | break; |
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70 | case ROARDSP_RESET_FULL: |
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71 | self->mul = 0; |
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72 | self->div = 1; |
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73 | return 0; |
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74 | break; |
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75 | default: |
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76 | return -1; |
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77 | } |
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78 | |
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79 | return -1; |
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80 | } |
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81 | |
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82 | //ll |
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