1 /*****************************************************************************
2 * modules.h : Module management functions.
3 *****************************************************************************
4 * Copyright (C) 2001 VideoLAN
6 * Authors: Samuel Hocevar <sam@zoy.org>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
21 *****************************************************************************/
23 /* Number of tries before we unload an unused module */
24 #define MODULE_HIDE_DELAY 50
26 /* The module handle type. */
28 typedef int module_handle_t;
30 typedef void * module_handle_t;
33 /*****************************************************************************
34 * Module capabilities.
35 *****************************************************************************/
37 #define MODULE_CAPABILITY_NULL 0 /* The Module can't do anything */
38 #define MODULE_CAPABILITY_INTF 1<<0 /* Interface */
39 #define MODULE_CAPABILITY_INPUT 1<<1 /* Input */
40 #define MODULE_CAPABILITY_DECAPS 1<<2 /* Decaps */
41 #define MODULE_CAPABILITY_ADEC 1<<3 /* Audio decoder */
42 #define MODULE_CAPABILITY_VDEC 1<<4 /* Video decoder */
43 #define MODULE_CAPABILITY_AOUT 1<<5 /* Audio output */
44 #define MODULE_CAPABILITY_VOUT 1<<6 /* Video output */
45 #define MODULE_CAPABILITY_YUV 1<<7 /* YUV colorspace conversion */
46 #define MODULE_CAPABILITY_AFX 1<<8 /* Audio effects */
47 #define MODULE_CAPABILITY_VFX 1<<9 /* Video effects */
49 /* FIXME: not yet used */
50 typedef struct probedata_s
58 /* FIXME: find a nicer way to do this. */
59 typedef struct function_list_s
61 int ( * p_probe ) ( probedata_t * p_data );
67 int ( * p_open ) ( struct aout_thread_s * p_aout );
68 int ( * p_setformat ) ( struct aout_thread_s * p_aout );
69 long ( * p_getbufinfo ) ( struct aout_thread_s * p_aout,
71 void ( * p_play ) ( struct aout_thread_s * p_aout,
72 byte_t *buffer, int i_size );
73 void ( * p_close ) ( struct aout_thread_s * p_aout );
80 typedef struct module_functions_s
82 /* The order here has to be the same as above for the #defines */
84 function_list_t input;
85 function_list_t decaps;
96 typedef struct module_functions_s * p_module_functions_t;
98 /*****************************************************************************
99 * Macros used to build the configuration structure.
100 *****************************************************************************/
102 /* Mandatory first and last parts of the structure */
103 #define MODULE_CONFIG_ITEM_START 0x01 /* The main window */
104 #define MODULE_CONFIG_ITEM_END 0x00 /* End of the window */
106 /* Configuration widgets */
107 #define MODULE_CONFIG_ITEM_PANE 0x02 /* A notebook pane */
108 #define MODULE_CONFIG_ITEM_FRAME 0x03 /* A frame */
109 #define MODULE_CONFIG_ITEM_COMMENT 0x04 /* A comment text */
110 #define MODULE_CONFIG_ITEM_STRING 0x05 /* A string */
111 #define MODULE_CONFIG_ITEM_FILE 0x06 /* A file selector */
112 #define MODULE_CONFIG_ITEM_CHECK 0x07 /* A checkbox */
113 #define MODULE_CONFIG_ITEM_CHOOSE 0x08 /* A choose box */
114 #define MODULE_CONFIG_ITEM_RADIO 0x09 /* A radio box */
115 #define MODULE_CONFIG_ITEM_SCALE 0x0a /* A horizontal ruler */
116 #define MODULE_CONFIG_ITEM_SPIN 0x0b /* A numerical selector */
118 typedef struct module_config_s
120 int i_type; /* Configuration widget type */
121 char * psz_text; /* Text commenting or describing the widget */
122 char * psz_name; /* Variable name */
123 void * p_getlist; /* Function to call to get a choice list */
124 void * p_change; /* Function to call when commiting a change */
127 /*****************************************************************************
128 * Bank and module description structures
129 *****************************************************************************/
131 /* The module bank structure */
132 typedef struct module_bank_s
134 struct module_s * first; /* First module of the bank */
136 vlc_mutex_t lock; /* Global lock -- you can't imagine how awful it
137 is to design thread-safe linked lists. */
140 /* The module description structure */
141 typedef struct module_s
143 boolean_t b_builtin; /* Set to true if the module is built in */
145 module_handle_t handle; /* Unique handle to refer to the module */
146 char * psz_filename; /* Module filename */
148 char * psz_name; /* Module _unique_ name */
149 char * psz_longname; /* Module descriptive name */
150 char * psz_version; /* Module version */
152 int i_usage; /* Reference counter */
153 int i_unused_delay; /* Delay until module is unloaded */
155 struct module_s * next; /* Next module */
156 struct module_s * prev; /* Previous module */
158 module_config_t * p_config; /* Module configuration structure table */
160 u32 i_capabilities; /* Capability list */
161 p_module_functions_t p_functions; /* Capability functions */
165 /*****************************************************************************
166 * Exported functions.
167 *****************************************************************************/
168 module_bank_t * module_CreateBank ( void );
169 void module_InitBank ( module_bank_t * p_bank );
170 void module_DestroyBank ( module_bank_t * p_bank );
171 void module_ResetBank ( module_bank_t * p_bank );
172 void module_ManageBank ( module_bank_t * p_bank );
174 module_t * module_Need ( module_bank_t *p_bank,
175 int i_capabilities, void *p_data );
176 void module_Unneed ( module_bank_t * p_bank,
177 module_t * p_module );