/usr/include/libroar/roardl.h is in libroar-dev 1.0~beta11-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
* Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2014
*
* This file is part of libroar a part of RoarAudio,
* a cross-platform sound system for both, home and professional use.
* See README for details.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3
* as published by the Free Software Foundation.
*
* libroar 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* NOTE for everyone want's to change something and send patches:
* read README and HACKING! There a addition information on
* the license of this document you need to read before you send
* any patches.
*
* NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
* or libpulse*:
* The libs libroaresd, libroararts and libroarpulse link this lib
* and are therefore GPL. Because of this it may be illigal to use
* them with any software that uses libesd, libartsc or libpulse*.
*/
#ifndef _LIBROARROARDL_H_
#define _LIBROARROARDL_H_
#include "libroar.h"
#define ROAR_DL_FLAG_DEFAULTS -1
#define ROAR_DL_FLAG_PLUGIN -2
#define ROAR_DL_FLAG_NONE 0x0000
#define ROAR_DL_FLAG_STATIC 0x0001 /* plugins are linked statically -lfoo */
#define ROAR_DL_FLAG_LAZY 0x0002
#define ROAR_DL_FLAG_PLUGINPATH 0x0004 /* Use plugin search path */
#define ROAR_DL_HANDLE_DEFAULT ((struct roar_dl_lhandle*)(void*)0)
#define ROAR_DL_HANDLE_NEXT ((struct roar_dl_lhandle*)(void*)1)
#define ROAR_DL_HANDLE_LIBROAR ((struct roar_dl_lhandle*)(void*)2)
#define ROAR_DL_HANDLE_APPLICATION ((struct roar_dl_lhandle*)(void*)3)
#define ROAR_DL_HANDLE_LIB ((struct roar_dl_lhandle*)(void*)4)
#define LIBROAR_DL_APPNAME "libroar " ROAR_VSTR_ROARAUDIO
#define LIBROAR_DL_ABIVERSION "1.0beta9"
#define ROAR_DL_FN_DSTR 0 /* VIO and DSTR drivers */
#define ROAR_DL_FN_CDRIVER 1 /* Client drivers, libroareio */
#define ROAR_DL_FN_TRANSCODER 2 /* Transcoder, libroardsp */
#define ROAR_DL_FN_DRIVER 3 /* Driver, roard? */
#define ROAR_DL_FN_SOURCE 4 /* Sources, roard? */
#define ROAR_DL_FN_FILTER 5 /* Filter, libroardsp */
#define ROAR_DL_FN_FF 6 /* file format??? */
#define ROAR_DL_FN_AUTH 7 /* Auth */
#define ROAR_DL_FN_BRIDGE 8 /* Bridges, roard? */
#define ROAR_DL_FN_ROARDSCHED 9 /* legacy, roard: Like appsched, but roard specific, old */
#define ROAR_DL_FN_APPSCHED 10 /* legacy: AppSched, old interface */
#define ROAR_DL_FN_PROTO 11 /* CPI, roard: Protocols */
#define ROAR_DL_FN_NOTIFY 12 /* ??? */
#define ROAR_DL_FN_INIT 13 /* global plugin instance init. should be avoided */
#define ROAR_DL_FN_REGFN 14 /* FN Registrations */
#define ROAR_DL_FN_APPLICATION 15 /* Application specific stuff */
#define ROAR_DL_FN_SERVICE 16 /* CSI: Services */
//#define ROAR_DL_FN_ 9
#define ROAR_DL_FN_MAX 24
#define ROAR_DL_LIBPARA_VERSION 1
#define ROAR_DL_LIBNAME_VERSION 0
#define ROAR_DL_LIBINST_VERSION 1
#define ROAR_DL_LIBDEP_VERSION 0
#define ROAR_DL_PLUGIN(lib) struct roar_dl_libraryinst * \
_##lib##_roaraudio_library_init(struct roar_dl_librarypara * para); \
struct roar_dl_libraryinst * \
_roaraudio_library_init(struct roar_dl_librarypara * para) { \
return _##lib##_roaraudio_library_init(para); \
} \
struct roar_dl_libraryinst * \
_##lib##_roaraudio_library_init(struct roar_dl_librarypara * para) \
#define ROAR_DL_PLUGIN_START(xlib) ROAR_DL_PLUGIN(xlib) { \
static int _inited = 0; \
static struct roar_dl_libraryinst lib; \
static struct roar_dl_libraryname libname; \
(void)para; \
if ( _inited ) \
return &lib; \
if ( para != NULL && \
(para->version != ROAR_DL_LIBPARA_VERSION || \
para->len < sizeof(struct roar_dl_librarypara)) ) { \
/* we should set ROAR_ERROR_NSVERSION here but can not */ \
/* because that would require the plugin to be linked */ \
/* aginst libroar */ \
return NULL; \
} \
memset(&lib, 0, sizeof(lib)); \
lib.version = ROAR_DL_LIBINST_VERSION; \
lib.len = sizeof(lib); \
memset(&libname, 0, sizeof(libname)); \
libname.version = ROAR_DL_LIBNAME_VERSION; \
libname.len = sizeof(libname); \
libname.name = #xlib; \
lib.libname = &libname; \
do
#define ROAR_DL_PLUGIN_END while(0); \
_inited = 1; \
return &lib; \
}
// general stuff:
#define ROAR_DL_PLUGIN_ABORT_LOADING(err) roar_err_set((err)); return NULL
#define ROAR_DL_PLUGIN_CHECK_VERSIONS(app,abi) (((lib.host_appname = (app)) != NULL) | \
((lib.host_abiversion = (abi)) != NULL) )
// should we keep this macro at all? Is it helpfull at all?
// if a plugin can handle multiple hosts it needs to call roar_dl_para_check_version() itself anyway.
#define ROAR_DL_PLUGIN_CHECK_VERSIONS_NOW(app,abi) if ( roar_dl_para_check_version(para, (app), (abi)) == -1 ) return NULL
// register stuff:
#define ROAR_DL_PLUGIN_REG(fn, funcptr) (lib.func[(fn)] = (funcptr))
#define ROAR_DL_PLUGIN_REG_UNLOAD(func) (lib.unload = (func))
#define ROAR_DL_PLUGIN_REG_APPSCHED(sched) (lib.appsched = (sched))
#define ROAR_DL_PLUGIN_REG_GLOBAL_DATA(ptr,init) lib.global_data_len = sizeof((init)); \
lib.global_data_init = &(init); \
lib.global_data_pointer = (void*)&(ptr)
#define ROAR_DL_PLUGIN_REG_LIBDEP(deps) (((lib.libdep = (deps)) == NULL) ? \
(ssize_t)-1 : \
(ssize_t)(lib.libdep_len = sizeof((deps))/sizeof(struct roar_dl_librarydep)))
// register objects using FN:
#define ROAR_DL_PLUGIN_REG_FN(subtype,obj,version) roar_dl_register_fn(NULL, -1, (subtype), &(obj), sizeof((obj)), (version), ROAR_DL_FNREG_OPT_NONE)
#define ROAR_DL_PLUGIN_REG_FNFUNC(fn) ROAR_DL_PLUGIN_REG((fn), _roaraudio_library_ ## fn)
// Do a FN reg callback registration:
#define ROAR_DL_RFNREG(lhandle,obj) roar_dl_register_fn((lhandle), ROAR_DL_FN_REGFN, ROAR_DL_FNREG_SUBTYPE, &(obj), sizeof((obj)), ROAR_DL_FNREG_VERSION, ROAR_DL_FNREG_OPT_NONE)
// meta data stuff:
#define ROAR_DL_PLUGIN_META_PRODUCT(x) (libname.libname = (x))
#define ROAR_DL_PLUGIN_META_PRODUCT_NV(name,vendor) ROAR_DL_PLUGIN_META_PRODUCT(name " <" vendor ">")
#define ROAR_DL_PLUGIN_META_PRODUCT_NIV_REAL(name,id,vendor) ROAR_DL_PLUGIN_META_PRODUCT(name " <" #id "/" vendor ">")
#define ROAR_DL_PLUGIN_META_PRODUCT_NIV(name,id,vendor) ROAR_DL_PLUGIN_META_PRODUCT_NIV_REAL(name,id,vendor)
#define ROAR_DL_PLUGIN_META_VERSION(x) (libname.libversion = (x))
#define ROAR_DL_PLUGIN_META_ABI(x) (libname.abiversion = (x))
#define ROAR_DL_PLUGIN_META_DESC(x) (libname.description = (x))
#define ROAR_DL_PLUGIN_META_CONTACT(x) (libname.contact = (x))
#define ROAR_DL_PLUGIN_META_CONTACT_FL(first,last) ROAR_DL_PLUGIN_META_CONTACT(first " " last)
#define ROAR_DL_PLUGIN_META_CONTACT_FLE(first,last,email) ROAR_DL_PLUGIN_META_CONTACT(first " " last " <" email ">")
#define ROAR_DL_PLUGIN_META_CONTACT_FLNE(first,last,nick,email) ROAR_DL_PLUGIN_META_CONTACT(first " \"" nick "\" " last " <" email ">")
#define ROAR_DL_PLUGIN_META_AUTHORS(x) (libname.authors = (x))
#define ROAR_DL_PLUGIN_META_LICENSE(x) (libname.license = (x))
#define ROAR_DL_PLUGIN_META_LICENSE_TAG(x) ROAR_DL_PLUGIN_META_LICENSE(ROAR_LICENSE_ ## x)
enum roar_dl_loadercmd {
ROAR_DL_LOADER_NOOP = 0,
ROAR_DL_LOADER_PRELOAD,
ROAR_DL_LOADER_LOAD,
ROAR_DL_LOADER_POSTLOAD,
ROAR_DL_LOADER_PREUNLOAD,
ROAR_DL_LOADER_UNLOAD,
ROAR_DL_LOADER_POSTUNLOAD
};
struct roar_plugincontainer;
struct roar_dl_librarypara {
int version; // version of this struct type (must be ROAR_DL_LIBPARA_VERSION)
size_t len; // Length of this struct type (must be sizeof(struct roar_dl_librarypara)
size_t refc; // Reference counter.
size_t argc; // number of elements in argv
struct roar_keyval * argv; // Parameter for the plugin
void * args_store; // Storage area for argv's data.
// If not NULL this and argv will be freed.
// If NULL argv will be left untouched.
void * binargv; // A pointer with binary data arguments.
// This can be used to pass any non-string data to
// the plugin. Normally this is NULL or the pointer
// to a struct with members of whatever is needed.
const char * appname; // application name in common format:
// Product/Version <VendorID/VendorName> (comments)
// Version and comment are optional and should be avoided.
// When no vendor ID is registered use <VendorName>.
// The VendorName MUST NOT contain a slash and SHOULD
// be as unique as possible.
// Examples: roard <0/RoarAudio>, MyAPP <myapp.org>,
// AnAPP <Musterman GbR>
const char * abiversion; // The ABI version. For libraries this should be the SONAME.
// For applications this should be the version of the release
// which introduced the current ABI.
// Examples: libroar2, 0.5.1
struct roar_notify_core * notifycore;
struct roar_plugincontainer * container;
int (*loader)(struct roar_dl_librarypara * lhandle, void * loader_userdata, enum roar_dl_loadercmd cmd, void * argp);
void * loader_userdata;
};
struct roar_dl_libraryname {
int version;
size_t len;
const char * name; //Format: shortname
const char * libname; //This is the same as appname in struct roar_dl_librarypara.
//Format: Product <VendorID/VendorName> (comments)
const char * libversion; //This is the pure version number of the library.
const char * abiversion; //This is the same as abiversion in struct roar_dl_librarypara.
//Format: Version
const char * description; //Free form.
const char * contact; //Format: first ["']nick["'] last (comment) <email>/OpenPGPkey/Phone/Room
const char * authors; //Other authors as free form.
const char * license; //Format: LicenseName-Version (options)
//Examples: GPL-3.0, LGPL-2.1, LGPL-3.0 (or later).
};
struct roar_dl_librarydep {
int version;
size_t len;
uint32_t flags;
const char * name;
const char * libname;
const char * abiversion;
};
#define ROAR_DL_DEP(__flags,__name,__libname,__abiversion) \
{.version = ROAR_DL_LIBDEP_VERSION, \
.len = sizeof(struct roar_dl_librarydep), \
.flags = __flags, \
.name = __name, \
.libname = __libname, \
.abiversion = __abiversion}
struct roar_dl_libraryinst {
int version;
size_t len;
int (*unload)(struct roar_dl_librarypara * para, struct roar_dl_libraryinst * lib);
int (*func[ROAR_DL_FN_MAX])(struct roar_dl_librarypara * para, struct roar_dl_libraryinst * lib);
struct roar_dl_libraryname * libname;
size_t global_data_len;
void * global_data_init;
void ** global_data_pointer;
struct roar_dl_librarydep * libdep;
size_t libdep_len;
struct roar_dl_appsched * appsched;
const char * host_appname;
const char * host_abiversion;
};
struct roar_dl_appsched {
int (*init) (struct roar_dl_librarypara * para);
int (*free) (struct roar_dl_librarypara * para);
int (*update)(struct roar_dl_librarypara * para);
int (*tick) (struct roar_dl_librarypara * para);
int (*wait) (struct roar_dl_librarypara * para);
};
enum roar_dl_appsched_trigger {
ROAR_DL_APPSCHED_INIT = 1,
#define ROAR_DL_APPSCHED_INIT ROAR_DL_APPSCHED_INIT
ROAR_DL_APPSCHED_FREE,
#define ROAR_DL_APPSCHED_FREE ROAR_DL_APPSCHED_FREE
ROAR_DL_APPSCHED_UPDATE,
#define ROAR_DL_APPSCHED_UPDATE ROAR_DL_APPSCHED_UPDATE
ROAR_DL_APPSCHED_TICK,
#define ROAR_DL_APPSCHED_TICK ROAR_DL_APPSCHED_TICK
ROAR_DL_APPSCHED_WAIT,
#define ROAR_DL_APPSCHED_WAIT ROAR_DL_APPSCHED_WAIT
ROAR_DL_APPSCHED_ABOUT,
#define ROAR_DL_APPSCHED_ABOUT ROAR_DL_APPSCHED_ABOUT
ROAR_DL_APPSCHED_HELP,
#define ROAR_DL_APPSCHED_HELP ROAR_DL_APPSCHED_HELP
ROAR_DL_APPSCHED_PREFERENCES
#define ROAR_DL_APPSCHED_PREFERENCES ROAR_DL_APPSCHED_PREFERENCES
};
// parameter functions:
struct roar_dl_librarypara * roar_dl_para_new(const char * args, void * binargv,
const char * appname, const char * abiversion);
int roar_dl_para_ref (struct roar_dl_librarypara * para);
int roar_dl_para_unref (struct roar_dl_librarypara * para);
int roar_dl_para_check_version (struct roar_dl_librarypara * para,
const char * appname, const char * abiversion);
// 'core' dynamic loader functions.
struct roar_dl_lhandle * roar_dl_open (const char * filename, int flags,
int ra_init, struct roar_dl_librarypara * para);
int roar_dl_ref (struct roar_dl_lhandle * lhandle);
int roar_dl_unref (struct roar_dl_lhandle * lhandle);
#define roar_dl_close(x) roar_dl_unref((x))
void * roar_dl_getsym (struct roar_dl_lhandle * lhandle, const char * sym, int type);
int roar_dl_ra_init(struct roar_dl_lhandle * lhandle,
const char * prefix,
struct roar_dl_librarypara * para);
const char * roar_dl_errstr (struct roar_dl_lhandle * lhandle);
// getting meta data:
struct roar_dl_librarypara * roar_dl_getpara(struct roar_dl_lhandle * lhandle);
const struct roar_dl_libraryname * roar_dl_getlibname(struct roar_dl_lhandle * lhandle);
// context switching:
// _restore() is to switch from main to library context. _store() is to store library context
// and switch back to main context.
int roar_dl_context_restore(struct roar_dl_lhandle * lhandle);
int roar_dl_context_store(struct roar_dl_lhandle * lhandle);
// appsched:
int roar_dl_appsched_trigger(struct roar_dl_lhandle * lhandle, enum roar_dl_appsched_trigger trigger);
// FN Registration:
// Actions objects can emit:
enum roar_dl_fnreg_action {
ROAR_DL_FNREG = 1, // The object is being registered
ROAR_DL_FNUNREG = 2 // The object is being unregistered
};
// Callback for registering/unregistering objects:
struct roar_dl_fnreg {
int fn; // Filter: The FN of the registering object or -1 for any.
int subtype; // Filter: The subtype of the registering object or -1 for any.
int version; // Filter: The version of the registering object or -1 for any.
int (*callback)( // Callback to call on register/unregister.
enum roar_dl_fnreg_action action, // The action happening
int fn, // The FN of the object
int subtype, // The subtype of the object
const void * object, // Pointer to the object
size_t objectlen, // Length of the object
int version, // Version of the object
int options, // Object Options.
void * userdata, // User data for the callback.
struct roar_dl_lhandle * lhandle // The registering handle.
// This is valid until the object is unregistered.
// Only roar_dl_context_restore(), roar_dl_context_store()
// and roar_dl_getpara() may be used on this object.
// Result of all other functions is undefined.
);
void * userdata; // The user data pointer passed to the callback.
};
// Parameters for FNREG registration:
#define ROAR_DL_FNREG_SUBTYPE 0
#define ROAR_DL_FNREG_VERSION 0
#define ROAR_DL_FNREG_SIZE sizeof(struct roar_dl_fnreg)
// Common protocol interface (CPI):
struct roar_dl_proto {
const int proto;
const char * description;
const int flags;
int (*set_proto)(int client, struct roar_vio_calls * vio, struct roar_buffer ** obuffer, void ** userdata, const struct roar_keyval * protopara, ssize_t protoparalen, struct roar_dl_librarypara * pluginpara);
int (*unset_proto)(int client, struct roar_vio_calls * vio, struct roar_buffer ** obuffer, void ** userdata, const struct roar_keyval * protopara, ssize_t protoparalen, struct roar_dl_librarypara * pluginpara);
int (*handle)(int client, struct roar_vio_calls * vio, struct roar_buffer ** obuffer, void ** userdata, const struct roar_keyval * protopara, ssize_t protoparalen, struct roar_dl_librarypara * pluginpara);
int (*flush)(int client, struct roar_vio_calls * vio, struct roar_buffer ** obuffer, void ** userdata, const struct roar_keyval * protopara, ssize_t protoparalen, struct roar_dl_librarypara * pluginpara);
int (*flushed)(int client, struct roar_vio_calls * vio, struct roar_buffer ** obuffer, void ** userdata, const struct roar_keyval * protopara, ssize_t protoparalen, struct roar_dl_librarypara * pluginpara);
int (*status)(int client, struct roar_vio_calls * vio, struct roar_buffer ** obuffer, void ** userdata, const struct roar_keyval * protopara, ssize_t protoparalen, struct roar_dl_librarypara * pluginpara);
};
#define ROAR_DL_PROTO_FLAGS_NONE 0
#define ROAR_DL_PROTO_STATUS_RX_READY 0x0001
#define ROAR_DL_PROTO_STATUS_TX_READY 0x0002
#define ROAR_DL_PROTO_STATUS_WAIT_NOTIFY 0x0004
// Parameters for FNREG registration:
#define ROAR_DL_PROTO_SUBTYPE 1 /* 0 = roard */
#define ROAR_DL_PROTO_VERSION 0
#define ROAR_DL_PROTO_SIZE sizeof(struct roar_dl_proto)
// Common Service Interface (CSI):
struct roar_dl_service {
// Name and ABI version of the application:
// if appname is NULL this is a /universal/ service.
// Such services MUST use APIs defined by the RoarAudio Project.
// If a random Vendor needs a API universal to own applications
// it should define a virtual application name for this.
const char * appname;
const char * appabi;
// Name and ABI/API version of service:
const char * servicename;
const char * serviceabi;
// Description:
const char * description;
// Flags (see below for defined flags):
const int flags;
// Userdata:
// This is some kind of constant data.
// It can bed used by the functions below for internal stuff.
const void * userdata;
// Functions:
// get_api returns a pointer to a struct with the API.
// The api is specific to [appname, appabi, servicename, serviceabi].
const void * (*get_api)(const struct roar_dl_service * service, struct roar_dl_librarypara * para);
};
#define ROAR_DL_SERVICE_FLAGS_NONE 0x0000
#define ROAR_DL_SERVICE_SUBTYPE 0
#define ROAR_DL_SERVICE_VERSION 0
#define ROAR_DL_SERVICE_SIZE sizeof(struct roar_dl_service)
#define ROAR_DL_PLUGIN_REG_SERVICES(obj) \
static int _roaraudio_library_ROAR_DL_FN_SERVICE(struct roar_dl_librarypara * para, struct roar_dl_libraryinst * lib) { \
size_t i; \
(void)para, (void)lib; \
for (i = 0; i < (sizeof((obj))/sizeof(*(obj))); i++) { \
ROAR_DL_PLUGIN_REG_FN(ROAR_DL_SERVICE_SUBTYPE, (obj)[i], ROAR_DL_SERVICE_VERSION); \
} \
return 0; \
}
#define ROAR_DL_PLUGIN_REG_SERVICES_GET_API(name,obj) \
static const void * name(const struct roar_dl_service * service, struct roar_dl_librarypara * para) { \
(void)service, (void)para; \
return &(obj); \
}
struct roar_dl_service_api {
const void * api;
struct roar_dl_lhandle * lhandle;
const struct roar_dl_service * service;
};
#define libroar_dl_service_apitype(type) \
union { \
struct roar_dl_service_api apiinterface; \
const struct type * api; \
}
int libroar_dl_service_get_api_real(struct roar_dl_librarypara * para, const char * appname, const char * appabi, const char * servicename, const char * serviceabi, int universal, struct roar_dl_service_api * api, int retry);
#define libroar_dl_service_get_api(para,appname,appabi,servicename,serviceabi,universal,api) libroar_dl_service_get_api_real((para),(appname),(appabi),(servicename),(serviceabi),(universal),(struct roar_dl_service_api *)(api), 1)
#define roar_dl_service_get_api(para,servicename,serviceabi,api) libroar_dl_service_get_api((para), (para) == NULL ? NULL : ((struct roar_dl_librarypara *)(para))->appname, (para) == NULL ? NULL : ((struct roar_dl_librarypara *)(para))->abiversion, (servicename), (serviceabi), 1, (api))
int libroar_dl_service_free_api_real(struct roar_dl_service_api * api);
#define libroar_dl_service_free_api(api) libroar_dl_service_free_api_real((struct roar_dl_service_api *)&(api))
#define libroar_dl_service_run_func(obj,name,type,...) ((type[3]){(type)roar_dl_context_restore((obj).apiinterface.lhandle), ((obj).api->name(__VA_ARGS__)), (type)roar_dl_context_store((obj).apiinterface.lhandle)})[1]
#define libroar_dl_service_run_func_void(obj,name,...) do { roar_dl_context_restore((obj).apiinterface.lhandle); (obj).api->name(__VA_ARGS__); roar_dl_context_store((obj).apiinterface.lhandle); } while (0)
#define libroar_dl_service_check_func(obj,name) ((obj).api->name != NULL)
// Reg FN:
// Options:
#define ROAR_DL_FNREG_OPT_NONE 0 /* no options */
// Register an FN.
int roar_dl_register_fn(struct roar_dl_lhandle * lhandle, int fn, int subtype, const void * object, size_t objectlen, int version, int options);
// Unregister an FN.
int roar_dl_unregister_fn2(struct roar_dl_lhandle * lhandle, int fn, int subtype, const void * object, size_t objectlen, int version, int options);
// Unregister FN for the given plugin.
// This should not be called directly and is called internally when needed.
int roar_dl_unregister_fn(struct roar_dl_lhandle * lhandle);
#endif
//ll
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