[5990] | 1 | //filter-slfi-file2filter.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2012-2014 |
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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, 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 <roaraudio.h> |
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| 27 | #include <libroarlight/libroarlight.h> |
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| 28 | |
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| 29 | #define MAX_STACKSIZE 16 |
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| 30 | |
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[5992] | 31 | static int __cb_event_add(struct roar_slfi_inst * inst, void * userdata, uint8_t event) { |
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| 32 | (void)inst; |
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| 33 | return roar_slfi_event_add(userdata, event); |
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| 34 | } |
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| 35 | |
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[5990] | 36 | static struct roar_slfi_inst * __parse_filter(char * p) { |
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| 37 | struct roar_slfi_inst * ret; |
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| 38 | struct roar_keyval * para = NULL; |
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| 39 | ssize_t paralen = -1; |
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| 40 | char * args; |
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| 41 | int err; |
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| 42 | |
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| 43 | args = strstr(p, " "); |
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| 44 | if ( args != NULL ) { |
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| 45 | *args = 0; |
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| 46 | args++; |
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| 47 | // strip spaces: |
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| 48 | for (; *p == ' '; p++); |
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| 49 | |
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| 50 | paralen = roar_keyval_split(¶, args, NULL, NULL, 1); |
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| 51 | } |
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| 52 | |
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| 53 | ret = roar_slfi_new(p, 1, para, paralen); |
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| 54 | err = roar_error; |
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| 55 | |
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| 56 | if ( para != NULL ) |
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| 57 | roar_mm_free(para); |
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| 58 | |
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| 59 | roar_err_set(err); |
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| 60 | return ret; |
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| 61 | } |
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| 62 | |
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| 63 | static struct roar_slfi_inst * __parse_vio(struct roar_vio_calls * vio) { |
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| 64 | struct roar_slfi_inst * stack[MAX_STACKSIZE] = {NULL}; |
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| 65 | size_t stackpointer = 0; |
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| 66 | size_t i; |
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| 67 | char buf[1024]; |
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| 68 | char * p; |
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| 69 | int err = ROAR_ERROR_NONE; |
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| 70 | char * end; |
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| 71 | |
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| 72 | // create root node. |
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| 73 | stack[stackpointer] = roar_slfi_new("chain", 1, NULL, -1); |
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| 74 | if ( stack[stackpointer] == NULL ) |
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| 75 | return NULL; |
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| 76 | stackpointer++; |
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| 77 | |
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| 78 | while ((p = roar_vio_fgets(vio, buf, sizeof(buf))) != NULL) { |
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| 79 | // strip spaces: |
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| 80 | for (; *p == ' '; p++); |
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| 81 | |
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| 82 | // strip newlines. |
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| 83 | for (end = p; *end; end++) { |
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| 84 | if ( *end == '\n' || *end == '\r' ) { |
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| 85 | *end = 0; |
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| 86 | break; |
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| 87 | } |
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| 88 | } |
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| 89 | // skip comments: |
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| 90 | if ( *p == '#' ) |
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| 91 | continue; |
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| 92 | if ( *p == '{' ) { |
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| 93 | if ( stackpointer == (MAX_STACKSIZE-1) ) { |
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| 94 | err = ROAR_ERROR_NOSPC; |
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| 95 | break; |
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| 96 | } |
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| 97 | stackpointer++; |
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| 98 | stack[stackpointer] = NULL; |
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| 99 | } else if ( *p == '}' ) { |
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| 100 | if ( stackpointer == 1 ) { |
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| 101 | err = ROAR_ERROR_ILLSEQ; |
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| 102 | break; |
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| 103 | } |
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| 104 | if ( stack[stackpointer] != NULL ) { |
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| 105 | roar_slfi_unref(stack[stackpointer]); |
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| 106 | stack[stackpointer] = NULL; |
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| 107 | } |
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| 108 | stackpointer--; |
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| 109 | } else { |
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| 110 | if ( stack[stackpointer] != NULL ) { |
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| 111 | roar_slfi_unref(stack[stackpointer]); |
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| 112 | stack[stackpointer] = NULL; |
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| 113 | } |
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| 114 | stack[stackpointer] = __parse_filter(p); |
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| 115 | if ( stack[stackpointer] == NULL ) { |
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| 116 | err = roar_error; |
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| 117 | break; |
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| 118 | } |
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| 119 | if ( roar_slfi_ctl(stack[stackpointer-1], ROAR_SLFI_CMD_PUSH, stack[stackpointer]) == -1 ) { |
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| 120 | err = roar_error; |
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| 121 | break; |
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| 122 | } |
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| 123 | } |
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| 124 | } |
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| 125 | |
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| 126 | for (i = stackpointer; i; i--) |
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| 127 | roar_slfi_unref(stack[i]); |
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| 128 | |
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| 129 | if (err != ROAR_ERROR_NONE ) { |
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| 130 | roar_slfi_unref(stack[0]); |
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| 131 | stack[0] = NULL; |
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| 132 | } |
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| 133 | |
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| 134 | roar_err_set(err); |
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| 135 | return stack[0]; |
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| 136 | } |
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| 137 | |
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| 138 | static struct roar_slfi_inst * __parse_file(const char * file) { |
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| 139 | struct roar_vio_calls vio; |
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| 140 | struct roar_slfi_inst * ret; |
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| 141 | int err; |
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| 142 | |
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| 143 | if ( file == NULL ) { |
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| 144 | roar_err_set(ROAR_ERROR_INVAL); |
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| 145 | return NULL; |
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| 146 | } |
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| 147 | |
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| 148 | if ( roar_vio_open_dstr_simple(&vio, file, ROAR_VIOF_READ) == -1 ) |
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| 149 | return NULL; |
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| 150 | |
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| 151 | ret = __parse_vio(&vio); |
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| 152 | err = roar_error; |
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| 153 | |
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| 154 | roar_vio_close(&vio); |
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| 155 | |
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| 156 | roar_err_set(err); |
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| 157 | return ret; |
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| 158 | } |
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| 159 | |
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| 160 | static int __init(struct roar_slfi_inst * inst, const struct roar_keyval * para, ssize_t paralen) { |
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| 161 | const struct roar_keyval * kv; |
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| 162 | const char * filename = NULL; |
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| 163 | ssize_t i; |
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| 164 | |
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| 165 | for (i = 0; i < paralen; i++) { |
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| 166 | kv = &(para[i]); |
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| 167 | if ( kv->key == NULL || kv->value == NULL ) |
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| 168 | continue; |
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| 169 | if ( !strcmp(kv->key, "file") ) { |
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| 170 | filename = kv->value; |
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| 171 | } else { |
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| 172 | ROAR_WARN("__init(*): Unknown parameter: %s", kv->key); |
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| 173 | } |
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| 174 | } |
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| 175 | |
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| 176 | inst->userdata = __parse_file(filename); |
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| 177 | if ( inst->userdata == NULL ) |
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| 178 | return -1; |
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| 179 | |
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[5992] | 180 | roar_slfi_cb_set_event_add(inst->userdata, __cb_event_add, inst); |
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| 181 | |
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[5990] | 182 | return 0; |
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| 183 | } |
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| 184 | |
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| 185 | static int __uninit(struct roar_slfi_inst * inst) { |
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| 186 | roar_slfi_unref(inst->userdata); |
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| 187 | inst->userdata = NULL; |
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| 188 | return 0; |
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| 189 | } |
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| 190 | |
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| 191 | static int __update(struct roar_slfi_inst * inst, uint8_t * universe, ssize_t size_of_universe, int32_t usecspassed, const uint8_t * event, size_t eventlen) { |
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| 192 | return roar_slfi_update(inst->userdata, universe, size_of_universe, usecspassed, event, eventlen); |
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| 193 | } |
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| 194 | |
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| 195 | static const struct roar_slfi_filter filter[1] = { |
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| 196 | { |
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| 197 | .name = "file2filter", |
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| 198 | .description = "SLFI filter structure builder", |
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| 199 | .flags = ROAR_SLFI_FLAG_ON_UPDATE, |
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| 200 | .init = __init, |
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| 201 | .uninit = __uninit, |
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| 202 | .update = __update, |
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| 203 | .ctl = NULL |
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| 204 | } |
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| 205 | }; |
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| 206 | |
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| 207 | ROAR_DL_PLUGIN_REG_SLFI(filter); |
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| 208 | |
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| 209 | // This is the plugin control block. |
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| 210 | ROAR_DL_PLUGIN_START(filter_slfi_file2filter) { |
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| 211 | // Here we set the name and vendor of our plugin. |
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| 212 | // If you have no Vendor ID you need to use ROAR_DL_PLUGIN_META_PRODUCT_NV(). |
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| 213 | ROAR_DL_PLUGIN_META_PRODUCT_NIV("filter-slfi-file2filter", ROAR_VID_ROARAUDIO, ROAR_VNAME_ROARAUDIO); |
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| 214 | |
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| 215 | // This sets the version of your plugin. |
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| 216 | ROAR_DL_PLUGIN_META_VERSION(ROAR_VERSION_STRING); |
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| 217 | |
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| 218 | // This sets the license of your plugin. |
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| 219 | // If there is no tag for the license you use you can just |
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| 220 | // use ROAR_DL_PLUGIN_META_LICENSE(). |
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| 221 | ROAR_DL_PLUGIN_META_LICENSE_TAG(GPLv3_0); |
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| 222 | |
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| 223 | // This sets the author and contact infos. |
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| 224 | // There are several other macros to do this with other parameters. |
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| 225 | // See ROAR_DL_PLUGIN_META_CONTACT*() in the header or documentation. |
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| 226 | ROAR_DL_PLUGIN_META_CONTACT_FLNE("Philipp", "Schafft", "ph3-der-loewe", "lion@lion.leolix.org"); |
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| 227 | |
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| 228 | // This sets the description for your plugin. |
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| 229 | ROAR_DL_PLUGIN_META_DESC("This plugin loads SLFI filter structures based on informations store in a file."); |
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| 230 | |
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| 231 | // Load filters. |
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| 232 | ROAR_DL_PLUGIN_REG_FNFUNC(ROAR_DL_FN_FILTER); |
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| 233 | |
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| 234 | // This is the end of the control block. |
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| 235 | } ROAR_DL_PLUGIN_END |
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| 236 | |
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| 237 | //ll |
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