1 | //ssynth.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 roard 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 | * RoarAudio 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 "roard.h" |
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26 | |
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27 | float ssynth_polys[SSYNTH_POLY_POLYMAX][SSYNTH_POLY_COEFF] = { |
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28 | {0.300000, 0.958333, -0.550000, 0.091667}, |
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29 | {0.700010, -0.083333, -0.150000, 0.033333} |
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30 | }; |
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31 | |
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32 | int ssynth_init_config(void) { |
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33 | memset(&ssynth_conf, 0, sizeof(ssynth_conf)); |
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34 | |
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35 | return 0; |
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36 | } |
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37 | |
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38 | #define _err() streams_delete(sid); return -1 |
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39 | int ssynth_init (void) { |
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40 | struct roar_stream_server * ss; |
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41 | struct roar_stream * s; |
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42 | int sid; |
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43 | |
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44 | if ( !ssynth_conf.enable ) |
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45 | return 0; |
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46 | |
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47 | memset(&g_ssynth, 0, sizeof(g_ssynth)); |
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48 | g_ssynth.stream = -1; |
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49 | |
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50 | if ( (sid = streams_new()) == -1 ) |
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51 | return -1; |
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52 | |
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53 | if ( streams_set_client(sid, g_self_client) == -1 ) { |
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54 | _err(); |
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55 | } |
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56 | |
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57 | if ( streams_set_dir(sid, ROAR_DIR_BRIDGE, 1) == -1 ) { |
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58 | _err(); |
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59 | } |
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60 | |
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61 | if ( streams_set_flag(sid, ROAR_FLAG_PRIMARY) == -1 ) { |
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62 | _err(); |
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63 | } |
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64 | |
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65 | if ( streams_set_name(sid, "Simple Synthesizer") == -1 ) { |
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66 | _err(); |
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67 | } |
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68 | |
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69 | if ( streams_get(sid, &ss) == -1 ) { |
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70 | _err(); |
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71 | } |
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72 | |
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73 | s = ROAR_STREAM(ss); |
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74 | |
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75 | memcpy(&(s->info), g_sa, sizeof(struct roar_audio_info)); |
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76 | |
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77 | s->info.channels = 1; |
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78 | s->info.codec = ROAR_CODEC_DEFAULT; |
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79 | |
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80 | g_ssynth.stream = sid; |
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81 | |
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82 | return 0; |
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83 | } |
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84 | |
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85 | int ssynth_free (void) { |
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86 | if ( !ssynth_conf.enable ) |
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87 | return 0; |
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88 | |
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89 | return streams_delete(g_ssynth.stream); |
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90 | } |
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91 | |
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92 | int ssynth_update (void) { |
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93 | return -1; |
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94 | } |
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95 | |
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96 | |
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97 | int ssynth_note_new(struct roar_note_octave * note, char vv) { |
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98 | int i; |
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99 | |
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100 | for (i = 0; i < SSYNTH_NOTES_MAX; i++) { |
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101 | if ( g_ssynth.notes[i].stage == SSYNTH_STAGE_UNUSED ) { |
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102 | // TODO: do some error checking here |
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103 | g_ssynth.notes[i].vv_down = vv; |
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104 | memcpy(&(g_ssynth.notes[i].note), note, sizeof(struct roar_note_octave)); |
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105 | roar_synth_init(&(g_ssynth.notes[i].synth), &(g_ssynth.notes[i].note), g_sa->rate); |
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106 | ssynth_note_set_stage(i, SSYNTH_STAGE_KEYSTROKE); |
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107 | return i; |
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108 | } |
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109 | } |
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110 | |
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111 | return -1; |
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112 | } |
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113 | |
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114 | int ssynth_note_free(int id) { |
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115 | g_ssynth.notes[id].stage = SSYNTH_STAGE_UNUSED; |
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116 | return 0; |
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117 | } |
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118 | |
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119 | int ssynth_note_find(struct roar_note_octave * note) { |
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120 | struct roar_note_octave * cn; |
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121 | int i; |
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122 | |
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123 | for (i = 0; i < SSYNTH_NOTES_MAX; i++) { |
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124 | if ( g_ssynth.notes[i].stage == SSYNTH_STAGE_UNUSED ) |
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125 | continue; |
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126 | |
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127 | cn = &(g_ssynth.notes[i].note); |
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128 | |
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129 | if ( !(note->note == cn->note && note->octave == cn->octave) ) |
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130 | continue; |
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131 | |
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132 | return i; |
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133 | } |
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134 | |
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135 | return -1; |
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136 | } |
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137 | |
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138 | int ssynth_note_set_stage(int id, int stage) { |
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139 | int r = -1; |
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140 | |
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141 | switch (stage) { |
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142 | case SSYNTH_STAGE_UNUSED: |
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143 | r = ssynth_note_free(id); |
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144 | break; |
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145 | case SSYNTH_STAGE_KEYSTROKE: |
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146 | r = roar_fader_init(&(g_ssynth.notes[id].fader), ssynth_polys[SSYNTH_POLY_KEYDOWN], SSYNTH_POLY_COEFF); |
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147 | break; |
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148 | case SSYNTH_STAGE_MIDSECTION: |
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149 | r = 0; |
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150 | break; |
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151 | case SSYNTH_STAGE_KEYRELEASE: |
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152 | r = roar_fader_init(&(g_ssynth.notes[id].fader), ssynth_polys[SSYNTH_POLY_KEYUP], SSYNTH_POLY_COEFF); |
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153 | break; |
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154 | } |
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155 | |
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156 | if ( r == 0 ) |
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157 | g_ssynth.notes[id].stage = stage; |
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158 | |
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159 | return r; |
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160 | } |
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161 | |
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162 | int ssynth_note_on (struct roar_note_octave * note, char vv) { |
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163 | return ssynth_note_new(note, vv); |
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164 | } |
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165 | |
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166 | int ssynth_note_off (struct roar_note_octave * note, char vv) { |
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167 | int id; |
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168 | |
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169 | if ( (id = ssynth_note_find(note)) == -1 ) |
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170 | return -1; |
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171 | |
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172 | // add support to for keyups... |
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173 | |
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174 | return ssynth_note_free(id); |
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175 | } |
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176 | |
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177 | int ssynth_eval_message (struct midi_message * mes) { |
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178 | if ( !ssynth_conf.enable ) |
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179 | return -1; |
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180 | |
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181 | switch (mes->type) { |
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182 | case MIDI_TYPE_NOTE_OFF: |
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183 | return ssynth_note_off(&(mes->d.note), mes->vv); |
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184 | break; |
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185 | case MIDI_TYPE_NOTE_ON: |
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186 | return ssynth_note_off(&(mes->d.note), mes->vv); |
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187 | break; |
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188 | default: |
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189 | /* ignore all other events at the moment */ |
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190 | return 0; |
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191 | } |
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192 | |
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193 | return -1; |
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194 | } |
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195 | |
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196 | //ll |
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