1 /* GStreamer 2 * Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com> 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public 15 * License along with this library; if not, write to the 16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef __GST_ASM_RULES_H__ 21 #define __GST_ASM_RULES_H__ 22 23 #include <gst/gst.h> 24 25 G_BEGIN_DECLS 26 27 #define MAX_RULEMATCHES 16 28 29 typedef struct _GstASMNode GstASMNode; 30 typedef struct _GstASMRule GstASMRule; 31 typedef struct _GstASMRuleBook GstASMRuleBook; 32 33 typedef enum { 34 GST_ASM_TOKEN_NONE, 35 GST_ASM_TOKEN_EOF, 36 37 GST_ASM_TOKEN_INT, 38 GST_ASM_TOKEN_FLOAT, 39 GST_ASM_TOKEN_IDENTIFIER, 40 GST_ASM_TOKEN_STRING, 41 42 GST_ASM_TOKEN_HASH, 43 GST_ASM_TOKEN_SEMICOLON, 44 GST_ASM_TOKEN_COMMA, 45 GST_ASM_TOKEN_DOLLAR, 46 47 GST_ASM_TOKEN_LPAREN, 48 GST_ASM_TOKEN_RPAREN, 49 50 GST_ASM_TOKEN_GREATER, 51 GST_ASM_TOKEN_LESS, 52 GST_ASM_TOKEN_GREATEREQUAL, 53 GST_ASM_TOKEN_LESSEQUAL, 54 GST_ASM_TOKEN_EQUAL, 55 GST_ASM_TOKEN_NOTEQUAL, 56 57 GST_ASM_TOKEN_AND, 58 GST_ASM_TOKEN_OR 59 } GstASMToken; 60 61 typedef enum { 62 GST_ASM_NODE_UNKNOWN, 63 GST_ASM_NODE_VARIABLE, 64 GST_ASM_NODE_INTEGER, 65 GST_ASM_NODE_FLOAT, 66 GST_ASM_NODE_OPERATOR 67 } GstASMNodeType; 68 69 typedef enum { 70 GST_ASM_OP_GREATER = GST_ASM_TOKEN_GREATER, 71 GST_ASM_OP_LESS = GST_ASM_TOKEN_LESS, 72 GST_ASM_OP_GREATEREQUAL = GST_ASM_TOKEN_GREATEREQUAL, 73 GST_ASM_OP_LESSEQUAL = GST_ASM_TOKEN_LESSEQUAL, 74 GST_ASM_OP_EQUAL = GST_ASM_TOKEN_EQUAL, 75 GST_ASM_OP_NOTEQUAL = GST_ASM_TOKEN_NOTEQUAL, 76 77 GST_ASM_OP_AND = GST_ASM_TOKEN_AND, 78 GST_ASM_OP_OR = GST_ASM_TOKEN_OR 79 } GstASMOp; 80 81 struct _GstASMNode { 82 GstASMNodeType type; 83 84 union { 85 gchar *varname; 86 gint intval; 87 gfloat floatval; 88 GstASMOp optype; 89 } data; 90 91 GstASMNode *left; 92 GstASMNode *right; 93 }; 94 95 struct _GstASMRule { 96 GstASMNode *root; 97 GHashTable *props; 98 }; 99 100 struct _GstASMRuleBook { 101 const gchar *rulebook; 102 103 guint n_rules; 104 GList *rules; 105 }; 106 107 G_END_DECLS 108 109 GstASMRuleBook* gst_asm_rule_book_new (const gchar *rulebook); 110 void gst_asm_rule_book_free (GstASMRuleBook *book); 111 112 gint gst_asm_rule_book_match (GstASMRuleBook *book, GHashTable *vars, 113 gint *rulematches); 114 115 #endif /* __GST_ASM_RULES_H__ */ 116