1 | //amp.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008, 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 | int roar_amp_pcm(void * output, int bits, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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28 | switch (bits) { |
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29 | case 8: return roar_amp_pcm_8bit (output, input, samples, channels, set); break; |
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30 | case 16: return roar_amp_pcm_16bit(output, input, samples, channels, set); break; |
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31 | case 24: return roar_amp_pcm_24bit(output, input, samples, channels, set); break; |
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32 | case 32: return roar_amp_pcm_32bit(output, input, samples, channels, set); break; |
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33 | default: return -1; |
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34 | } |
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35 | } |
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36 | |
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37 | int roar_amp_pcm_8bit (int8_t * output, int8_t * input, int samples, int channels, struct roar_mixer_settings * set) { |
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38 | int i; |
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39 | register int s; |
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40 | |
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41 | if ( !(input && output) ) |
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42 | return -1; |
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43 | |
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44 | if (set->rpg_mul == set->rpg_div) { |
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45 | for (i = 0; i < samples; i++) { |
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46 | s = input[i]; |
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47 | s *= set->mixer[i % channels]; |
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48 | s /= set->scale; |
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49 | output[i] = s; |
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50 | } |
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51 | } else { |
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52 | for (i = 0; i < samples; i++) { |
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53 | s = input[i]; |
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54 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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55 | s /= set->scale; |
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56 | output[i] = s; |
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57 | } |
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58 | } |
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59 | |
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60 | return 0; |
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61 | } |
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62 | |
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63 | int roar_amp_pcm_16bit (int16_t * output, int16_t * input, int samples, int channels, struct roar_mixer_settings * set) { |
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64 | int i; |
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65 | register int s; |
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66 | |
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67 | if ( !(input && output) ) |
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68 | return -1; |
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69 | |
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70 | if (set->rpg_mul == set->rpg_div) { |
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71 | for (i = 0; i < samples; i++) { |
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72 | s = input[i]; |
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73 | s *= set->mixer[i % channels]; |
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74 | s /= set->scale; |
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75 | output[i] = s; |
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76 | } |
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77 | } else { |
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78 | for (i = 0; i < samples; i++) { |
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79 | s = input[i]; |
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80 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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81 | s /= set->scale; |
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82 | output[i] = s; |
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83 | } |
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84 | } |
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85 | |
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86 | return 0; |
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87 | } |
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88 | |
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89 | int roar_amp_pcm_24bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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90 | return -1; |
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91 | } |
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92 | |
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93 | int roar_amp_pcm_32bit (int32_t * output, int32_t * input, int samples, int channels, struct roar_mixer_settings * set) { |
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94 | #ifdef ROAR_NATIVE_INT64 |
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95 | int i; |
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96 | ROAR_NATIVE_INT64 s; |
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97 | |
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98 | if ( !(input && output) ) |
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99 | return -1; |
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100 | |
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101 | if (set->rpg_mul == set->rpg_div) { |
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102 | for (i = 0; i < samples; i++) { |
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103 | s = input[i]; |
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104 | s *= set->mixer[i % channels]; |
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105 | s /= set->scale; |
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106 | output[i] = s; |
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107 | } |
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108 | } else { |
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109 | for (i = 0; i < samples; i++) { |
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110 | s = input[i]; |
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111 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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112 | s /= set->scale; |
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113 | output[i] = s; |
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114 | } |
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115 | } |
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116 | |
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117 | return 0; |
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118 | #else |
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119 | return -1; |
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120 | #endif |
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121 | } |
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122 | |
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123 | //ll |
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