/src/vlc/include/vlc_services_discovery.h

Source
/*****************************************************************************
 * vlc_services_discovery.h : Services Discover functions
 *****************************************************************************
 * Copyright (C) 1999-2004 VLC authors and VideoLAN
 *
 * Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifndef VLC_SERVICES_DISCOVERY_H_
#define VLC_SERVICES_DISCOVERY_H_

#include <vlc_input.h>
#include <vlc_probe.h>

/**
 * \file
 * This file lists functions and structures for service discovery (SD) in vlc
 */

# ifdef __cplusplus
extern "C" {
# endif

/**
 * @{
 */

struct services_discovery_callbacks
{
    void (*item_added)(struct services_discovery_t *sd, input_item_t *parent,
                       input_item_t *item);
    void (*item_removed)(struct services_discovery_t *sd, input_item_t *item);
};

struct services_discovery_owner_t
{
    const struct services_discovery_callbacks *cbs;
    void *sys; /**< Private data for the owner callbacks */
};

/**
 * Main service discovery structure to build a SD module
 */
struct services_discovery_t
{
    struct vlc_object_t obj;
    module_t *          p_module;             /**< Loaded module */

    char *psz_name;                           /**< Main name of the SD */
    config_chain_t *p_cfg;                    /**< Configuration for the SD */

    const char *description; /**< Human-readable name */

    /** Control function
     * \see services_discovery_command_e
     */
    int ( *pf_control ) ( services_discovery_t *, int, va_list );

    void *p_sys;                              /**< Custom private data */

    struct services_discovery_owner_t owner; /**< Owner callbacks */
};

/**
 * Service discovery categories
 * \see vlc_sd_probe_Add
 */
enum services_discovery_category_e
{
    SD_CAT_DEVICES = 1,           /**< Devices, like portable music players */
    SD_CAT_LAN,                   /**< LAN/WAN services, like Upnp or SAP */
    SD_CAT_INTERNET,              /**< Internet or Website channels services */
    SD_CAT_MYCOMPUTER             /**< Computer services, like Discs or Apps */
};

/**
 * Service discovery control commands
 */
enum services_discovery_command_e
{
    SD_CMD_SEARCH = 1,          /**< arg1 = query */
    SD_CMD_DESCRIPTOR           /**< arg1 = services_discovery_descriptor_t* */
};

/**
 * Service discovery capabilities
 */
enum services_discovery_capability_e
{
    SD_CAP_SEARCH = 1           /**< One can search in the SD */
};

/**
 * Service discovery descriptor
 * \see services_discovery_command_e
 */
typedef struct
{
    char *psz_short_desc;       /**< The short description, human-readable */
    char *psz_icon_url;         /**< URL to the icon that represents it */
    char *psz_url;              /**< URL for the service */
    int   i_capabilities;       /**< \see services_discovery_capability_e */
} services_discovery_descriptor_t;


/***********************************************************************
 * Service Discovery
 ***********************************************************************/

/**
 * Ask for a research in the SD
 * @param p_sd: the Service Discovery
 * @param i_control: the command to issue
 * @param args: the argument list
 * @return VLC_SUCCESS in case of success, the error code otherwise
 */
static inline int vlc_sd_control( services_discovery_t *p_sd, int i_control, va_list args )
{
    if( p_sd->pf_control )
        return p_sd->pf_control( p_sd, i_control, args );
    else
        return VLC_EGENERIC;
}

/* Get the services discovery modules names to use in Create(), in a null
 * terminated string array. Array and string must be freed after use. */
VLC_API char ** vlc_sd_GetNames( vlc_object_t *, char ***, int ** ) VLC_USED;
#define vlc_sd_GetNames(obj, pln, pcat ) \
        vlc_sd_GetNames(VLC_OBJECT(obj), pln, pcat)

/**
 * Creates a services discoverer.
 */
VLC_API services_discovery_t *vlc_sd_Create(vlc_object_t *parent,
    const char *chain, const struct services_discovery_owner_t *owner)
VLC_USED;
#define vlc_sd_Create( obj, a, b ) \
        vlc_sd_Create( VLC_OBJECT( obj ), a, b )

VLC_API void vlc_sd_Destroy( services_discovery_t * );

/**
 * Added top-level service callback.
 *
 * This is a convenience wrapper for services_discovery_AddSubItem().
 * It covers the most comomn case wherby the added item is a top-level service,
 * i.e. it has no parent node.
 */
static inline void services_discovery_AddItem(services_discovery_t *sd,
                                              input_item_t *item)
{
    sd->owner.cbs->item_added(sd, NULL, item);
}

/**
 * Added service callback.
 *
 * A services discovery module invokes this function when it "discovers" a new
 * service, i.e. a new input item.
 *
 * @note This callback does not take ownership of the input item; it might
 * however (and most probably will) add one of more references to the item.
 *
 * The caller is responsible for releasing its own reference(s) eventually.
 * Keeping a reference is necessary to call services_discovery_RemoveItem() or
 * to alter the item later. However, if the caller will never remove nor alter
 * the item, it can drop its reference(s) immediately.
 *
 * @param sd the service discovery instance exposing the item
 * @param parent the parent to attach the item to
 * @param item input item to add
 */
static inline void services_discovery_AddSubItem(services_discovery_t *sd,
                                                 input_item_t *parent,
                                                 input_item_t *item)
{
    sd->owner.cbs->item_added(sd, parent, item);
}

/**
 * Removed service callback.
 *
 * A services discovery module invokes this function when it senses that a
 * service is no longer available.
 */
static inline void services_discovery_RemoveItem(services_discovery_t *sd,
                                                 input_item_t *item)
{
    sd->owner.cbs->item_removed(sd, item);
}

/* SD probing */

VLC_API int vlc_sd_probe_Add(vlc_probe_t *, const char *, const char *, int category);

#define VLC_SD_PROBE_SUBMODULE \
    add_submodule() \
        set_capability( "services probe", 100 ) \
        set_callback( vlc_sd_probe_Open )

#define VLC_SD_PROBE_HELPER(name, longname, cat) \
static int vlc_sd_probe_Open (vlc_object_t *obj) \
{ \
    return vlc_sd_probe_Add ((struct vlc_probe_t *)obj, name, \
                             longname, cat); \
}

/** @} */
# ifdef __cplusplus
}
# endif

#endif

Coverage Report

Created: 2025-12-14 06:40

Line	Count	Source
1		/*****************************************************************************
2		* vlc_services_discovery.h : Services Discover functions
3		*****************************************************************************
4		* Copyright (C) 1999-2004 VLC authors and VideoLAN
5		*
6		* Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
7		*
8		* This program is free software; you can redistribute it and/or modify it
9		* under the terms of the GNU Lesser General Public License as published by
10		* the Free Software Foundation; either version 2.1 of the License, or
11		* (at your option) any later version.
12		*
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 Lesser General Public License for more details.
17		*
18		* You should have received a copy of the GNU Lesser General Public License
19		* along with this program; if not, write to the Free Software Foundation,
20		* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
21		*****************************************************************************/
22
23		#ifndef VLC_SERVICES_DISCOVERY_H_
24		#define VLC_SERVICES_DISCOVERY_H_
25
26		#include <vlc_input.h>
27		#include <vlc_probe.h>
28
29		/**
30		* \file
31		* This file lists functions and structures for service discovery (SD) in vlc
32		*/
33
34		# ifdef __cplusplus
35		extern "C" {
36		# endif
37
38		/**
39		* @{
40		*/
41
42		struct services_discovery_callbacks
43		{
44		void (item_added)(struct services_discovery_t sd, input_item_t *parent,
45		input_item_t *item);
46		void (item_removed)(struct services_discovery_t sd, input_item_t *item);
47		};
48
49		struct services_discovery_owner_t
50		{
51		const struct services_discovery_callbacks *cbs;
52		void sys; /< Private data for the owner callbacks /
53		};
54
55		/**
56		* Main service discovery structure to build a SD module
57		*/
58		struct services_discovery_t
59		{
60		struct vlc_object_t obj;
61		module_t * p_module; /*< Loaded module /
62
63		char psz_name; /< Main name of the SD /
64		config_chain_t p_cfg; /< Configuration for the SD /
65
66		const char description; /< Human-readable name /
67
68		/** Control function
69		* \see services_discovery_command_e
70		*/
71		int ( pf_control ) ( services_discovery_t , int, va_list );
72
73		void p_sys; /< Custom private data /
74
75		struct services_discovery_owner_t owner; /*< Owner callbacks /
76		};
77
78		/**
79		* Service discovery categories
80		* \see vlc_sd_probe_Add
81		*/
82		enum services_discovery_category_e
83		{
84		SD_CAT_DEVICES = 1, /*< Devices, like portable music players /
85		SD_CAT_LAN, /*< LAN/WAN services, like Upnp or SAP /
86		SD_CAT_INTERNET, /*< Internet or Website channels services /
87		SD_CAT_MYCOMPUTER /*< Computer services, like Discs or Apps /
88		};
89
90		/**
91		* Service discovery control commands
92		*/
93		enum services_discovery_command_e
94		{
95		SD_CMD_SEARCH = 1, /*< arg1 = query /
96		SD_CMD_DESCRIPTOR /*< arg1 = services_discovery_descriptor_t */
97		};
98
99		/**
100		* Service discovery capabilities
101		*/
102		enum services_discovery_capability_e
103		{
104		SD_CAP_SEARCH = 1 /*< One can search in the SD /
105		};
106
107		/**
108		* Service discovery descriptor
109		* \see services_discovery_command_e
110		*/
111		typedef struct
112		{
113		char psz_short_desc; /< The short description, human-readable /
114		char psz_icon_url; /< URL to the icon that represents it /
115		char psz_url; /< URL for the service /
116		int i_capabilities; /*< \see services_discovery_capability_e /
117		} services_discovery_descriptor_t;
118
119
120		/***********************************************************************
121		* Service Discovery
122		***********************************************************************/
123
124		/**
125		* Ask for a research in the SD
126		* @param p_sd: the Service Discovery
127		* @param i_control: the command to issue
128		* @param args: the argument list
129		* @return VLC_SUCCESS in case of success, the error code otherwise
130		*/
131		static inline int vlc_sd_control( services_discovery_t *p_sd, int i_control, va_list args )
132	0	{
133	0	if( p_sd->pf_control )
134	0	return p_sd->pf_control( p_sd, i_control, args );
135	0	else
136	0	return VLC_EGENERIC;
137	0	} Unexecuted instantiation: sap.c:vlc_sd_control Unexecuted instantiation: libvlc.c:vlc_sd_control Unexecuted instantiation: media_source.c:vlc_sd_control Unexecuted instantiation: media_tree.c:vlc_sd_control Unexecuted instantiation: services_discovery.c:vlc_sd_control
138
139		/* Get the services discovery modules names to use in Create(), in a null
140		* terminated string array. Array and string must be freed after use. */
141		VLC_API char ** vlc_sd_GetNames( vlc_object_t , char , int ) VLC_USED;
142		#define vlc_sd_GetNames(obj, pln, pcat ) \
143	0	vlc_sd_GetNames(VLC_OBJECT(obj), pln, pcat)
144
145		/**
146		* Creates a services discoverer.
147		*/
148		VLC_API services_discovery_t vlc_sd_Create(vlc_object_t parent,
149		const char chain, const struct services_discovery_owner_t owner)
150		VLC_USED;
151		#define vlc_sd_Create( obj, a, b ) \
152	0	vlc_sd_Create( VLC_OBJECT( obj ), a, b )
153
154		VLC_API void vlc_sd_Destroy( services_discovery_t * );
155
156		/**
157		* Added top-level service callback.
158		*
159		* This is a convenience wrapper for services_discovery_AddSubItem().
160		* It covers the most comomn case wherby the added item is a top-level service,
161		* i.e. it has no parent node.
162		*/
163		static inline void services_discovery_AddItem(services_discovery_t *sd,
164		input_item_t *item)
165	0	{
166	0	sd->owner.cbs->item_added(sd, NULL, item);
167	0	} Unexecuted instantiation: sap.c:services_discovery_AddItem Unexecuted instantiation: libvlc.c:services_discovery_AddItem Unexecuted instantiation: media_source.c:services_discovery_AddItem Unexecuted instantiation: media_tree.c:services_discovery_AddItem Unexecuted instantiation: services_discovery.c:services_discovery_AddItem
168
169		/**
170		* Added service callback.
171		*
172		* A services discovery module invokes this function when it "discovers" a new
173		* service, i.e. a new input item.
174		*
175		* @note This callback does not take ownership of the input item; it might
176		* however (and most probably will) add one of more references to the item.
177		*
178		* The caller is responsible for releasing its own reference(s) eventually.
179		* Keeping a reference is necessary to call services_discovery_RemoveItem() or
180		* to alter the item later. However, if the caller will never remove nor alter
181		* the item, it can drop its reference(s) immediately.
182		*
183		* @param sd the service discovery instance exposing the item
184		* @param parent the parent to attach the item to
185		* @param item input item to add
186		*/
187		static inline void services_discovery_AddSubItem(services_discovery_t *sd,
188		input_item_t *parent,
189		input_item_t *item)
190	0	{
191	0	sd->owner.cbs->item_added(sd, parent, item);
192	0	} Unexecuted instantiation: sap.c:services_discovery_AddSubItem Unexecuted instantiation: libvlc.c:services_discovery_AddSubItem Unexecuted instantiation: media_source.c:services_discovery_AddSubItem Unexecuted instantiation: media_tree.c:services_discovery_AddSubItem Unexecuted instantiation: services_discovery.c:services_discovery_AddSubItem
193
194		/**
195		* Removed service callback.
196		*
197		* A services discovery module invokes this function when it senses that a
198		* service is no longer available.
199		*/
200		static inline void services_discovery_RemoveItem(services_discovery_t *sd,
201		input_item_t *item)
202	0	{
203	0	sd->owner.cbs->item_removed(sd, item);
204	0	} Unexecuted instantiation: sap.c:services_discovery_RemoveItem Unexecuted instantiation: libvlc.c:services_discovery_RemoveItem Unexecuted instantiation: media_source.c:services_discovery_RemoveItem Unexecuted instantiation: media_tree.c:services_discovery_RemoveItem Unexecuted instantiation: services_discovery.c:services_discovery_RemoveItem
205
206		/* SD probing */
207
208		VLC_API int vlc_sd_probe_Add(vlc_probe_t , const char , const char *, int category);
209
210		#define VLC_SD_PROBE_SUBMODULE \
211	54	add_submodule() \
212	54	set_capability( "services probe", 100 ) \
213	54	set_callback( vlc_sd_probe_Open )
214
215		#define VLC_SD_PROBE_HELPER(name, longname, cat) \
216	0	static int vlc_sd_probe_Open (vlc_object_t *obj) \
217	0	{ \
218	0	return vlc_sd_probe_Add ((struct vlc_probe_t *)obj, name, \
219	0	longname, cat); \
220	0	}
221
222		/** @} */
223		# ifdef __cplusplus
224		}
225		# endif
226
227		#endif