1 | //libroardsp.h: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - August 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 | #ifndef _LIBROARDSP_H_ |
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26 | #define _LIBROARDSP_H_ |
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27 | |
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28 | #include <roaraudio.h> |
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29 | |
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30 | __BEGIN_DECLS |
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31 | |
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32 | #include "midi.h" |
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33 | |
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34 | // defines |
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35 | #define ROARDSP_MAX_FILTERS_PER_CHAIN 8 |
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36 | |
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37 | #define ROARDSP_FILTER_NONE 0 |
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38 | #define ROARDSP_FILTER_AMP 1 |
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39 | #define ROARDSP_FILTER_LOWP 2 |
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40 | #define ROARDSP_FILTER_HIGHP 3 |
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41 | |
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42 | // filter CTLs: |
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43 | |
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44 | #define ROARDSP_FCTL_FREQ 1 |
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45 | #define ROARDSP_FCTL_TIME 2 |
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46 | #define ROARDSP_FCTL_MUL 3 |
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47 | #define ROARDSP_FCTL_DIV 4 |
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48 | |
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49 | // types: |
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50 | |
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51 | struct roardsp_filter { |
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52 | int channels; |
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53 | int bits; |
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54 | int rate; |
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55 | void * inst; |
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56 | int (*calc )(struct roardsp_filter * filter, void * data, size_t samples); |
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57 | int (*uninit)(struct roardsp_filter * filter); |
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58 | int (*ctl )(struct roardsp_filter * filter, int cmd, void * data); |
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59 | }; |
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60 | |
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61 | struct roardsp_filterchain { |
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62 | int filters; |
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63 | struct roardsp_filter * filter[ROARDSP_MAX_FILTERS_PER_CHAIN]; |
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64 | }; |
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65 | |
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66 | struct roardsp_lowp { |
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67 | uint32_t freq; // in mHz (0Hz..4MHz) |
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68 | uint16_t a, b; |
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69 | int32_t old[ROAR_MAX_CHANNELS]; |
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70 | }; |
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71 | |
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72 | struct roardsp_highp { |
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73 | uint32_t freq; // in mHz (0Hz..4MHz) |
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74 | int32_t a, b, c; |
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75 | int32_t oldout[ROAR_MAX_CHANNELS]; |
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76 | int32_t oldin[ROAR_MAX_CHANNELS]; |
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77 | }; |
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78 | |
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79 | struct roardsp_amp { |
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80 | int32_t mul; |
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81 | int32_t div; |
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82 | }; |
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83 | |
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84 | // funcs: |
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85 | int roardsp_filter_str2id(char * str); |
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86 | char * roardsp_filter_id2str(int id); |
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87 | int roardsp_filter_init (struct roardsp_filter * filter, struct roar_stream * stream, int id); |
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88 | int roardsp_filter_uninit(struct roardsp_filter * filter); |
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89 | int roardsp_filter_calc (struct roardsp_filter * filter, void * data, size_t len); |
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90 | int roardsp_filter_ctl (struct roardsp_filter * filter, int cmd, void * data); |
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91 | |
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92 | int roardsp_fchain_init (struct roardsp_filterchain * chain); |
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93 | int roardsp_fchain_uninit(struct roardsp_filterchain * chain); |
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94 | int roardsp_fchain_add (struct roardsp_filterchain * chain, struct roardsp_filter * filter); |
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95 | int roardsp_fchain_calc (struct roardsp_filterchain * chain, void * data, size_t len); |
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96 | int roardsp_fchain_num (struct roardsp_filterchain * chain); |
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97 | |
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98 | // filter: |
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99 | |
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100 | int roardsp_lowp_init (struct roardsp_filter * filter, struct roar_stream * stream, int id); |
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101 | int roardsp_lowp_uninit(struct roardsp_filter * filter); |
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102 | int roardsp_lowp_calc16(struct roardsp_filter * filter, void * data, size_t samples); |
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103 | int roardsp_lowp_ctl (struct roardsp_filter * filter, int cmd, void * data); |
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104 | |
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105 | int roardsp_highp_init (struct roardsp_filter * filter, struct roar_stream * stream, int id); |
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106 | int roardsp_highp_uninit(struct roardsp_filter * filter); |
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107 | int roardsp_highp_calc16(struct roardsp_filter * filter, void * data, size_t samples); |
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108 | int roardsp_highp_ctl (struct roardsp_filter * filter, int cmd, void * data); |
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109 | |
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110 | int roardsp_amp_init (struct roardsp_filter * filter, struct roar_stream * stream, int id); |
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111 | int roardsp_amp_uninit(struct roardsp_filter * filter); |
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112 | int roardsp_amp_calc16(struct roardsp_filter * filter, void * data, size_t samples); |
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113 | int roardsp_amp_calc8 (struct roardsp_filter * filter, void * data, size_t samples); |
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114 | int roardsp_amp_ctl (struct roardsp_filter * filter, int cmd, void * data); |
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115 | |
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116 | // codecs: |
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117 | int roardsp_conv_alaw2pcm16 (int16_t * out, char * in, size_t len); |
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118 | int roardsp_conv_pcm162alaw (char * out, int16_t * in, size_t len); |
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119 | |
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120 | __END_DECLS |
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121 | |
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122 | #endif |
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123 | |
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124 | //ll |
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