1 | //fader.c: |
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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 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 | #define _CHECK_BASIC() if ( state == NULL ) return -1 |
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28 | #define _CHECK_CALCPCM() _CHECK_BASIC(); if ( frames == 0 ) return 0; if ( data == NULL ) return -1; |
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29 | |
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30 | int roar_fader_init (struct roar_fader_state * state, float * poly, int coeff) { |
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31 | _CHECK_BASIC(); |
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32 | |
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33 | if ( poly == NULL ) |
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34 | return -1; |
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35 | |
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36 | if ( coeff < 2 ) |
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37 | return -1; |
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38 | |
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39 | if ( coeff > ROAR_FADER_MAX_COEFF ) |
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40 | return -1; |
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41 | |
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42 | memset(state, 0, sizeof(struct roar_fader_state)); |
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43 | |
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44 | state->rate = -1; |
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45 | state->coeff = coeff; |
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46 | |
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47 | memcpy(&(state->poly), poly, sizeof(float)*coeff); |
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48 | |
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49 | return 0; |
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50 | } |
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51 | |
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52 | int roar_fader_set_rate (struct roar_fader_state * state, int rate) { |
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53 | _CHECK_BASIC(); |
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54 | |
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55 | state->rate = rate; |
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56 | |
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57 | return 0; |
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58 | } |
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59 | |
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60 | int roar_fader_set_startstop(struct roar_fader_state * state, ssize_t start, ssize_t stop) { |
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61 | _CHECK_BASIC(); |
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62 | |
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63 | if ( start >= 0 ) |
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64 | state->start = start; |
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65 | |
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66 | if ( stop >= 0 ) |
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67 | state->stop = stop; |
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68 | |
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69 | return 0; |
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70 | } |
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71 | |
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72 | int roar_fader_calcpcm_i16n(struct roar_fader_state * state, int16_t * data, size_t frames, int channels) { |
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73 | _CHECK_CALCPCM(); |
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74 | |
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75 | switch (channels) { |
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76 | case 1: return roar_fader_calcpcm_i161(state, data, frames); |
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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 | int roar_fader_calcpcm_i161(struct roar_fader_state * state, int16_t * data, size_t frames) { |
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83 | return -1; |
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84 | } |
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85 | |
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86 | //ll |
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