[2448] | 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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[2453] | 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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[2450] | 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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[2452] | 38 | #define _err() streams_delete(sid); return -1 |
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[2450] | 39 | int ssynth_init (void) { |
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[2452] | 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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[2450] | 44 | if ( !ssynth_conf.enable ) |
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| 45 | return 0; |
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| 46 | |
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[2452] | 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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[2468] | 80 | g_ssynth.stream = sid; |
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[2452] | 81 | |
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| 82 | return 0; |
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[2450] | 83 | } |
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| 84 | |
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| 85 | int ssynth_free (void) { |
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[2469] | 86 | int i; |
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| 87 | |
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[2450] | 88 | if ( !ssynth_conf.enable ) |
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| 89 | return 0; |
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| 90 | |
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[2469] | 91 | for (i = 0; i < SSYNTH_NOTES_MAX; i++) { |
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| 92 | if ( g_ssynth.notes[i].buf != NULL ) { |
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| 93 | roar_buffer_free(g_ssynth.notes[i].buf); |
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| 94 | g_ssynth.notes[i].buf = NULL; |
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| 95 | } |
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| 96 | } |
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| 97 | |
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[2452] | 98 | return streams_delete(g_ssynth.stream); |
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[2450] | 99 | } |
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| 100 | |
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[2467] | 101 | int ssynth_update (void) { |
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[2469] | 102 | struct roar_stream_server * ss; |
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| 103 | struct roar_stream * s; |
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| 104 | struct roar_buffer * buf; |
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| 105 | size_t buflen; |
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| 106 | size_t needlen; |
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| 107 | int i; |
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| 108 | |
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| 109 | if ( !ssynth_conf.enable ) |
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| 110 | return 0; |
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| 111 | |
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| 112 | if ( streams_get(g_ssynth.stream, &ss) == -1 ) { |
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| 113 | return -1; |
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| 114 | } |
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| 115 | |
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| 116 | s = ROAR_STREAM(ss); |
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| 117 | |
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| 118 | needlen = ROAR_OUTPUT_CALC_OUTBUFSIZE(&(s->info)); |
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| 119 | |
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| 120 | for (i = 0; i < SSYNTH_NOTES_MAX; i++) { |
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| 121 | if ( g_ssynth.notes[i].stage != SSYNTH_STAGE_UNUSED ) { |
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| 122 | if ( g_ssynth.notes[i].buf == NULL ) { |
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| 123 | if ( roar_buffer_new(&buf, needlen) == -1 ) |
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| 124 | continue; |
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| 125 | |
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| 126 | g_ssynth.notes[i].buf = buf; |
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| 127 | } else { |
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| 128 | buf = g_ssynth.notes[i].buf; |
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| 129 | |
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| 130 | if ( roar_buffer_get_len(buf, &buflen) == -1 ) |
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| 131 | continue; |
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| 132 | |
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| 133 | if ( buflen < needlen ) { |
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| 134 | if ( roar_buffer_set_len(buf, needlen) == -1 ) |
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| 135 | continue; |
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| 136 | } |
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| 137 | } |
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| 138 | } |
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| 139 | } |
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| 140 | |
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[2467] | 141 | return -1; |
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| 142 | } |
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| 143 | |
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| 144 | |
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[2457] | 145 | int ssynth_note_new(struct roar_note_octave * note, char vv) { |
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| 146 | int i; |
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| 147 | |
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| 148 | for (i = 0; i < SSYNTH_NOTES_MAX; i++) { |
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| 149 | if ( g_ssynth.notes[i].stage == SSYNTH_STAGE_UNUSED ) { |
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| 150 | // TODO: do some error checking here |
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| 151 | g_ssynth.notes[i].vv_down = vv; |
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| 152 | memcpy(&(g_ssynth.notes[i].note), note, sizeof(struct roar_note_octave)); |
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| 153 | roar_synth_init(&(g_ssynth.notes[i].synth), &(g_ssynth.notes[i].note), g_sa->rate); |
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| 154 | ssynth_note_set_stage(i, SSYNTH_STAGE_KEYSTROKE); |
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| 155 | return i; |
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| 156 | } |
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| 157 | } |
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| 158 | |
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| 159 | return -1; |
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| 160 | } |
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| 161 | |
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| 162 | int ssynth_note_free(int id) { |
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| 163 | g_ssynth.notes[id].stage = SSYNTH_STAGE_UNUSED; |
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| 164 | return 0; |
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| 165 | } |
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| 166 | |
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| 167 | int ssynth_note_find(struct roar_note_octave * note) { |
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[2465] | 168 | struct roar_note_octave * cn; |
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| 169 | int i; |
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| 170 | |
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| 171 | for (i = 0; i < SSYNTH_NOTES_MAX; i++) { |
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| 172 | if ( g_ssynth.notes[i].stage == SSYNTH_STAGE_UNUSED ) |
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| 173 | continue; |
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| 174 | |
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| 175 | cn = &(g_ssynth.notes[i].note); |
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| 176 | |
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| 177 | if ( !(note->note == cn->note && note->octave == cn->octave) ) |
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| 178 | continue; |
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| 179 | |
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| 180 | return i; |
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| 181 | } |
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| 182 | |
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[2457] | 183 | return -1; |
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| 184 | } |
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| 185 | |
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| 186 | int ssynth_note_set_stage(int id, int stage) { |
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| 187 | int r = -1; |
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| 188 | |
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| 189 | switch (stage) { |
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| 190 | case SSYNTH_STAGE_UNUSED: |
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| 191 | r = ssynth_note_free(id); |
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| 192 | break; |
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| 193 | case SSYNTH_STAGE_KEYSTROKE: |
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| 194 | r = roar_fader_init(&(g_ssynth.notes[id].fader), ssynth_polys[SSYNTH_POLY_KEYDOWN], SSYNTH_POLY_COEFF); |
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| 195 | break; |
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| 196 | case SSYNTH_STAGE_MIDSECTION: |
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| 197 | r = 0; |
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| 198 | break; |
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| 199 | case SSYNTH_STAGE_KEYRELEASE: |
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| 200 | r = roar_fader_init(&(g_ssynth.notes[id].fader), ssynth_polys[SSYNTH_POLY_KEYUP], SSYNTH_POLY_COEFF); |
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| 201 | break; |
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| 202 | } |
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| 203 | |
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| 204 | if ( r == 0 ) |
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| 205 | g_ssynth.notes[id].stage = stage; |
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| 206 | |
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| 207 | return r; |
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| 208 | } |
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| 209 | |
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[2463] | 210 | int ssynth_note_on (struct roar_note_octave * note, char vv) { |
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[2464] | 211 | return ssynth_note_new(note, vv); |
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[2463] | 212 | } |
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| 213 | |
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| 214 | int ssynth_note_off (struct roar_note_octave * note, char vv) { |
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[2464] | 215 | int id; |
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| 216 | |
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| 217 | if ( (id = ssynth_note_find(note)) == -1 ) |
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| 218 | return -1; |
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| 219 | |
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| 220 | // add support to for keyups... |
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| 221 | |
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| 222 | return ssynth_note_free(id); |
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[2463] | 223 | } |
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| 224 | |
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[2460] | 225 | int ssynth_eval_message (struct midi_message * mes) { |
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[2463] | 226 | if ( !ssynth_conf.enable ) |
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| 227 | return -1; |
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| 228 | |
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| 229 | switch (mes->type) { |
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| 230 | case MIDI_TYPE_NOTE_OFF: |
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| 231 | return ssynth_note_off(&(mes->d.note), mes->vv); |
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| 232 | break; |
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| 233 | case MIDI_TYPE_NOTE_ON: |
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| 234 | return ssynth_note_off(&(mes->d.note), mes->vv); |
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| 235 | break; |
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| 236 | default: |
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| 237 | /* ignore all other events at the moment */ |
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| 238 | return 0; |
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| 239 | } |
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| 240 | |
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[2460] | 241 | return -1; |
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| 242 | } |
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| 243 | |
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[2448] | 244 | //ll |
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