[5709] | 1 | //dmx-random.c: |
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| 2 | |
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| 3 | /* |
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[5823] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2013 |
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[5709] | 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, 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 <roard/include/roard.h> |
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| 27 | |
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| 28 | #define SAMPLES_PER_TICK 2 |
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| 29 | |
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| 30 | struct channel { |
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| 31 | int32_t endsamp; |
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| 32 | int32_t cursamp; |
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| 33 | unsigned char startval, endval; |
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| 34 | }; |
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| 35 | |
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| 36 | struct state { |
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| 37 | size_t startaddr; |
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| 38 | size_t len; |
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| 39 | struct channel * channels; |
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| 40 | }; |
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| 41 | |
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| 42 | static struct state * g_state; |
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| 43 | static struct state g_state_init = { |
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| 44 | .startaddr = 0, |
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| 45 | .len = 4, |
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| 46 | .channels = NULL |
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| 47 | }; |
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| 48 | |
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| 49 | |
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| 50 | static void calc_end(size_t index) { |
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| 51 | if ( g_state->channels[index].cursamp <= g_state->channels[index].endsamp ) |
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| 52 | return; |
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| 53 | |
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| 54 | g_state->channels[index].cursamp = 0; |
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| 55 | g_state->channels[index].endsamp = (int32_t)1 + (int32_t)roar_random_uint16() * (int32_t)SAMPLES_PER_TICK; |
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| 56 | |
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| 57 | g_state->channels[index].startval = g_state->channels[index].endval; |
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| 58 | |
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| 59 | if ( roar_random_uint16() < 32768 ) |
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| 60 | return; |
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| 61 | |
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| 62 | g_state->channels[index].endval = roar_random_uint16() & 0xE0; |
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| 63 | } |
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| 64 | |
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| 65 | static void calc_channel(size_t index) { |
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| 66 | // trel = cursamp/endsamp |
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| 67 | double trel = (double)g_state->channels[index].cursamp/(double)g_state->channels[index].endsamp; |
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| 68 | double valdiff = (double)(g_state->channels[index].endval - g_state->channels[index].startval)*trel; |
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| 69 | valdiff += (double)g_state->channels[index].startval; |
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| 70 | light_dmxchannel_set(g_state->startaddr + index, (unsigned char)(unsigned int)(int)valdiff); |
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| 71 | } |
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| 72 | |
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| 73 | static int _init (struct roar_dl_librarypara * para) { |
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| 74 | struct roar_keyval * p; |
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| 75 | |
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| 76 | p = roar_keyval_lookup(para->argv, "startaddr", para->argc, 1); |
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| 77 | if ( p != NULL && p->value != NULL ) |
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| 78 | g_state->startaddr = atoi(p->value); |
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| 79 | |
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| 80 | p = roar_keyval_lookup(para->argv, "len", para->argc, 1); |
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| 81 | if ( p != NULL && p->value != NULL ) |
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| 82 | g_state->len = atoi(p->value); |
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| 83 | |
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| 84 | g_state->channels = roar_mm_malloc(g_state->len*sizeof(struct channel)); |
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| 85 | if ( g_state->channels == NULL ) |
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| 86 | return -1; |
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| 87 | |
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| 88 | memset(g_state->channels, 0, g_state->len*sizeof(struct channel)); |
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| 89 | |
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| 90 | return 0; |
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| 91 | } |
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| 92 | |
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| 93 | static int _free (struct roar_dl_librarypara * para) { |
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| 94 | (void)para; |
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| 95 | |
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| 96 | if ( g_state->channels != NULL ) |
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| 97 | roar_mm_free(g_state->channels); |
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| 98 | g_state->channels = NULL; |
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| 99 | return 0; |
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| 100 | } |
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| 101 | |
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| 102 | static int _update (struct roar_dl_librarypara * para) { |
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| 103 | size_t i; |
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| 104 | |
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| 105 | (void)para; |
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| 106 | |
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| 107 | for (i = 0; i < g_state->len; i++) { |
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| 108 | calc_end(i); |
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| 109 | calc_channel(i); |
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| 110 | g_state->channels[i].cursamp += ROAR_OUTPUT_BUFFER_SAMPLES; |
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| 111 | } |
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| 112 | |
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| 113 | return 0; |
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| 114 | } |
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| 115 | |
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| 116 | static struct roar_dl_appsched sched = { |
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| 117 | .init = _init, |
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| 118 | .free = _free, |
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| 119 | .update = _update, |
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| 120 | .tick = NULL, |
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| 121 | .wait = NULL |
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| 122 | }; |
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| 123 | |
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| 124 | ROAR_DL_PLUGIN_START(dmx_random) { |
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| 125 | ROARD_DL_CHECK_VERSIONS(); |
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| 126 | |
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| 127 | ROAR_DL_PLUGIN_META_PRODUCT_NIV("dmx-random", ROAR_VID_ROARAUDIO, ROAR_VNAME_ROARAUDIO); |
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| 128 | ROAR_DL_PLUGIN_META_VERSION(ROAR_VERSION_STRING); |
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| 129 | ROAR_DL_PLUGIN_META_LICENSE_TAG(GPLv3_0); |
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| 130 | ROAR_DL_PLUGIN_META_CONTACT_FLNE("Philipp", "Schafft", "ph3-der-loewe", "lion@lion.leolix.org"); |
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| 131 | ROAR_DL_PLUGIN_META_DESC("This generates random light effects using roard's DMX interface."); |
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| 132 | |
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| 133 | ROAR_DL_PLUGIN_REG_GLOBAL_DATA(g_state, g_state_init); |
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| 134 | ROAR_DL_PLUGIN_REG_APPSCHED(&sched); |
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| 135 | } ROAR_DL_PLUGIN_END |
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| 136 | |
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| 137 | //ll |
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