1 | //filter_swap.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2013 |
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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_swap_init (struct roardsp_filter * filter, struct roar_stream * stream, int id) { |
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29 | struct roardsp_swap * inst = roar_mm_malloc(sizeof(struct roardsp_swap)); |
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30 | |
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31 | (void)stream, (void)id; |
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32 | |
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33 | ROAR_DBG("roardsp_swap_init(*): inst=%p", inst); |
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34 | |
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35 | if ( inst == NULL ) { |
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36 | ROAR_ERR("roardsp_swap_init(*): Can not alloc memory for filter swap: %s", strerror(errno)); |
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37 | filter->inst = NULL; |
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38 | return -1; |
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39 | } |
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40 | |
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41 | filter->inst = inst; |
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42 | |
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43 | return roardsp_swap_reset(filter, ROARDSP_RESET_FULL); |
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44 | } |
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45 | |
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46 | int roardsp_swap_uninit (struct roardsp_filter * filter) { |
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47 | if ( filter == NULL ) |
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48 | return -1; |
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49 | |
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50 | if ( filter->inst == NULL ) |
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51 | return -1; |
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52 | |
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53 | roar_mm_free(filter->inst); |
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54 | |
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55 | return 0; |
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56 | } |
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57 | |
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58 | #define _calcX2(bits) \ |
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59 | int roardsp_swap_calc##bits##2(struct roardsp_filter * filter, void * data, size_t samples) { \ |
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60 | int##bits##_t * d = data; \ |
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61 | register int##bits##_t s; \ |
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62 | size_t i; \ |
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63 | \ |
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64 | (void)filter; \ |
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65 | \ |
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66 | for (i = 0; i < samples; i += 2) { \ |
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67 | ROAR_DBG("roardsp_swap_calc*2(*): d[i]=%i, d[i+1]=%i", d[i], d[i+1]); \ |
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68 | s = d[i]; \ |
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69 | d[i] = d[i+1]; \ |
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70 | d[i+1] = s; \ |
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71 | } \ |
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72 | \ |
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73 | return 0; \ |
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74 | } |
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75 | |
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76 | _calcX2(8) |
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77 | _calcX2(16) |
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78 | _calcX2(32) |
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79 | |
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80 | int roardsp_swap_ctl (struct roardsp_filter * filter, int cmd, void * data) { |
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81 | (void)filter, (void)cmd, (void)data; |
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82 | roar_err_set(ROAR_ERROR_NOSYS); |
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83 | return -1; |
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84 | } |
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85 | |
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86 | int roardsp_swap_reset (struct roardsp_filter * filter, int what) { |
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87 | struct roardsp_swap * inst = NULL; |
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88 | int i; |
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89 | |
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90 | if ( filter == NULL ) |
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91 | return -1; |
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92 | |
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93 | if ( (inst = filter->inst) == NULL ) |
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94 | return -1; |
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95 | |
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96 | switch (what) { |
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97 | case ROARDSP_RESET_NONE: |
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98 | case ROARDSP_RESET_STATE: |
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99 | return 0; |
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100 | break; |
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101 | case ROARDSP_RESET_FULL: |
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102 | memset(inst, 0, sizeof(struct roardsp_swap)); |
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103 | |
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104 | for (i = 0; i < ROAR_MAX_CHANNELS; i++) |
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105 | inst->map[i] = i; |
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106 | |
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107 | inst->map[0] = 1; |
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108 | inst->map[1] = 0; |
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109 | return 0; |
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110 | break; |
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111 | default: |
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112 | return -1; |
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113 | } |
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114 | |
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115 | return -1; |
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116 | } |
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117 | |
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118 | //ll |
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