1 | //roardl.h: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2012 |
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5 | * |
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6 | * This file is part of libroar 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 | * libroar 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 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | #ifndef _LIBROARROARDL_H_ |
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37 | #define _LIBROARROARDL_H_ |
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38 | |
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39 | #include "libroar.h" |
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40 | |
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41 | #define ROAR_DL_FLAG_DEFAULTS -1 |
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42 | #define ROAR_DL_FLAG_PLUGIN -2 |
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43 | #define ROAR_DL_FLAG_NONE 0x0000 |
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44 | #define ROAR_DL_FLAG_STATIC 0x0001 /* plugins are linked statically -lfoo */ |
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45 | #define ROAR_DL_FLAG_LAZY 0x0002 |
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46 | #define ROAR_DL_FLAG_PLUGINPATH 0x0004 /* Use plugin search path */ |
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47 | |
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48 | #define ROAR_DL_HANDLE_DEFAULT ((struct roar_dl_lhandle*)(void*)0) |
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49 | #define ROAR_DL_HANDLE_NEXT ((struct roar_dl_lhandle*)(void*)1) |
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50 | #define ROAR_DL_HANDLE_LIBROAR ((struct roar_dl_lhandle*)(void*)2) |
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51 | #define ROAR_DL_HANDLE_APPLICATION ((struct roar_dl_lhandle*)(void*)3) |
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52 | |
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53 | #define ROAR_DL_FN_DSTR 0 /* VIO and DSTR drivers */ |
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54 | #define ROAR_DL_FN_CDRIVER 1 /* Client drivers, libroareio */ |
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55 | #define ROAR_DL_FN_TRANSCODER 2 /* Transcoder, libroardsp */ |
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56 | #define ROAR_DL_FN_DRIVER 3 /* Driver, roard? */ |
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57 | #define ROAR_DL_FN_SOURCE 4 /* Sources, roard? */ |
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58 | #define ROAR_DL_FN_FILTER 5 /* Filter, libroardsp */ |
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59 | #define ROAR_DL_FN_FF 6 /* file format??? */ |
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60 | #define ROAR_DL_FN_AUTH 7 /* Auth */ |
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61 | #define ROAR_DL_FN_BRIDGE 8 /* Bridges, roard? */ |
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62 | #define ROAR_DL_FN_ROARDSCHED 9 /* Like appsched, but roard specific, old */ |
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63 | #define ROAR_DL_FN_APPSCHED 10 /* AppSched, old interface */ |
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64 | #define ROAR_DL_FN_PROTO 11 /* Protocols, roard? */ |
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65 | #define ROAR_DL_FN_NOTIFY 12 /* ??? */ |
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66 | #define ROAR_DL_FN_INIT 13 /* global plugin instance init. should be avoided */ |
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67 | #define ROAR_DL_FN_REGFN 14 /* FN Registrations */ |
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68 | #define ROAR_DL_FN_APPLICATION 15 /* Application specific stuff */ |
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69 | //#define ROAR_DL_FN_ 9 |
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70 | #define ROAR_DL_FN_MAX 24 |
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71 | |
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72 | #define ROAR_DL_LIBPARA_VERSION 1 |
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73 | #define ROAR_DL_LIBNAME_VERSION 0 |
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74 | #define ROAR_DL_LIBINST_VERSION 1 |
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75 | #define ROAR_DL_LIBDEP_VERSION 0 |
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76 | |
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77 | #define ROAR_DL_PLUGIN(lib) struct roar_dl_libraryinst * \ |
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78 | _##lib##_roaraudio_library_init(struct roar_dl_librarypara * para); \ |
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79 | struct roar_dl_libraryinst * \ |
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80 | _roaraudio_library_init(struct roar_dl_librarypara * para) { \ |
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81 | return _##lib##_roaraudio_library_init(para); \ |
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82 | } \ |
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83 | struct roar_dl_libraryinst * \ |
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84 | _##lib##_roaraudio_library_init(struct roar_dl_librarypara * para) \ |
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85 | |
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86 | #define ROAR_DL_PLUGIN_START(xlib) ROAR_DL_PLUGIN(xlib) { \ |
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87 | static int _inited = 0; \ |
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88 | static struct roar_dl_libraryinst lib; \ |
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89 | static struct roar_dl_libraryname libname; \ |
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90 | (void)para; \ |
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91 | if ( _inited ) \ |
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92 | return &lib; \ |
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93 | if ( para != NULL && \ |
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94 | (para->version != ROAR_DL_LIBPARA_VERSION || \ |
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95 | para->len < sizeof(struct roar_dl_librarypara)) ) { \ |
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96 | /* we should set ROAR_ERROR_NSVERSION here but can not */ \ |
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97 | /* because that would require the plugin to be linked */ \ |
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98 | /* aginst libroar */ \ |
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99 | return NULL; \ |
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100 | } \ |
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101 | memset(&lib, 0, sizeof(lib)); \ |
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102 | lib.version = ROAR_DL_LIBINST_VERSION; \ |
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103 | lib.len = sizeof(lib); \ |
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104 | memset(&libname, 0, sizeof(libname)); \ |
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105 | libname.version = ROAR_DL_LIBNAME_VERSION; \ |
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106 | libname.len = sizeof(libname); \ |
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107 | libname.name = #xlib; \ |
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108 | lib.libname = &libname; \ |
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109 | do |
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110 | |
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111 | #define ROAR_DL_PLUGIN_END while(0); \ |
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112 | _inited = 1; \ |
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113 | return &lib; \ |
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114 | } |
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115 | |
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116 | // general stuff: |
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117 | #define ROAR_DL_PLUGIN_ABORT_LOADING(err) roar_err_set((err)); return NULL |
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118 | #define ROAR_DL_PLUGIN_CHECK_VERSIONS(app,abi) (((lib.host_appname = (app)) != NULL) | \ |
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119 | ((lib.host_abiversion = (abi)) != NULL) ) |
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120 | // should we keep this macro at all? Is it helpfull at all? |
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121 | // if a plugin can handle multiple hosts it needs to call roar_dl_para_check_version() itself anyway. |
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122 | #define ROAR_DL_PLUGIN_CHECK_VERSIONS_NOW(app,abi) if ( roar_dl_para_check_version(para, (app), (abi)) == -1 ) return NULL |
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123 | |
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124 | // register stuff: |
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125 | #define ROAR_DL_PLUGIN_REG(fn, funcptr) (lib.func[(fn)] = (funcptr)) |
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126 | #define ROAR_DL_PLUGIN_REG_UNLOAD(func) (lib.unload = (func)) |
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127 | #define ROAR_DL_PLUGIN_REG_APPSCHED(sched) (lib.appsched = (sched)) |
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128 | #define ROAR_DL_PLUGIN_REG_GLOBAL_DATA(ptr,init) lib.global_data_len = sizeof((init)); \ |
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129 | lib.global_data_init = &(init); \ |
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130 | lib.global_data_pointer = (void*)&(ptr) |
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131 | #define ROAR_DL_PLUGIN_REG_LIBDEP(deps) (((lib.libdep = (deps)) == NULL) ? \ |
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132 | (ssize_t)-1 : \ |
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133 | (ssize_t)(lib.libdep_len = sizeof((deps))/sizeof(struct roar_dl_librarydep))) |
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134 | |
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135 | // register objects using FN: |
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136 | #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) |
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137 | |
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138 | // Do a FN reg callback registration: |
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139 | #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) |
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140 | |
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141 | // meta data stuff: |
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142 | #define ROAR_DL_PLUGIN_META_PRODUCT(x) (libname.libname = (x)) |
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143 | #define ROAR_DL_PLUGIN_META_PRODUCT_NV(name,vendor) ROAR_DL_PLUGIN_META_PRODUCT(name " <" vendor ">") |
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144 | #define ROAR_DL_PLUGIN_META_PRODUCT_NIV_REAL(name,id,vendor) ROAR_DL_PLUGIN_META_PRODUCT(name " <" #id "/" vendor ">") |
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145 | #define ROAR_DL_PLUGIN_META_PRODUCT_NIV(name,id,vendor) ROAR_DL_PLUGIN_META_PRODUCT_NIV_REAL(name,id,vendor) |
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146 | #define ROAR_DL_PLUGIN_META_VERSION(x) (libname.libversion = (x)) |
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147 | #define ROAR_DL_PLUGIN_META_ABI(x) (libname.abiversion = (x)) |
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148 | #define ROAR_DL_PLUGIN_META_DESC(x) (libname.description = (x)) |
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149 | #define ROAR_DL_PLUGIN_META_CONTACT(x) (libname.contact = (x)) |
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150 | #define ROAR_DL_PLUGIN_META_CONTACT_FL(first,last) ROAR_DL_PLUGIN_META_CONTACT(first " " last) |
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151 | #define ROAR_DL_PLUGIN_META_CONTACT_FLE(first,last,email) ROAR_DL_PLUGIN_META_CONTACT(first " " last " <" email ">") |
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152 | #define ROAR_DL_PLUGIN_META_CONTACT_FLNE(first,last,nick,email) ROAR_DL_PLUGIN_META_CONTACT(first " \"" nick "\" " last " <" email ">") |
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153 | #define ROAR_DL_PLUGIN_META_AUTHORS(x) (libname.authors = (x)) |
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154 | #define ROAR_DL_PLUGIN_META_LICENSE(x) (libname.license = (x)) |
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155 | #define ROAR_DL_PLUGIN_META_LICENSE_TAG(x) ROAR_DL_PLUGIN_META_LICENSE(ROAR_LICENSE_ ## x) |
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156 | |
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157 | enum roar_dl_loadercmd { |
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158 | ROAR_DL_LOADER_NOOP = 0, |
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159 | ROAR_DL_LOADER_PRELOAD, |
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160 | ROAR_DL_LOADER_LOAD, |
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161 | ROAR_DL_LOADER_POSTLOAD, |
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162 | ROAR_DL_LOADER_PREUNLOAD, |
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163 | ROAR_DL_LOADER_UNLOAD, |
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164 | ROAR_DL_LOADER_POSTUNLOAD |
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165 | }; |
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166 | |
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167 | struct roar_plugincontainer; |
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168 | |
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169 | struct roar_dl_librarypara { |
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170 | int version; // version of this struct type (must be ROAR_DL_LIBPARA_VERSION) |
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171 | size_t len; // Length of this struct type (must be sizeof(struct roar_dl_librarypara) |
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172 | |
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173 | size_t refc; // Reference counter. |
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174 | |
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175 | size_t argc; // number of elements in argv |
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176 | struct roar_keyval * argv; // Parameter for the plugin |
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177 | void * args_store; // Storage area for argv's data. |
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178 | // If not NULL this and argv will be freed. |
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179 | // If NULL argv will be left untouched. |
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180 | |
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181 | void * binargv; // A pointer with binary data arguments. |
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182 | // This can be used to pass any non-string data to |
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183 | // the plugin. Normally this is NULL or the pointer |
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184 | // to a struct with members of whatever is needed. |
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185 | |
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186 | const char * appname; // application name in common format: |
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187 | // Product/Version <VendorID/VendorName> (comments) |
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188 | // Version and comment are optional and should be avoided. |
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189 | // When no vendor ID is registered use <VendorName>. |
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190 | // The VendorName MUST NOT contain a slash and SHOULD |
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191 | // be as unique as possible. |
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192 | // Examples: roard <0/RoarAudio>, MyAPP <myapp.org>, |
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193 | // AnAPP <Musterman GbR> |
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194 | const char * abiversion; // The ABI version. For libraries this should be the SONAME. |
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195 | // For applications this should be the version of the release |
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196 | // which introduced the current ABI. |
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197 | // Examples: libroar2, 0.5.1 |
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198 | struct roar_notify_core * notifycore; |
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199 | struct roar_plugincontainer * container; |
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200 | int (*loader)(struct roar_dl_librarypara * lhandle, void * loader_userdata, enum roar_dl_loadercmd cmd, void * argp); |
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201 | void * loader_userdata; |
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202 | }; |
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203 | |
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204 | struct roar_dl_libraryname { |
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205 | int version; |
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206 | size_t len; |
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207 | const char * name; //Format: shortname |
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208 | const char * libname; //This is the same as appname in struct roar_dl_librarypara. |
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209 | //Format: Product <VendorID/VendorName> (comments) |
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210 | const char * libversion; //This is the pure version number of the library. |
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211 | const char * abiversion; //This is the same as abiversion in struct roar_dl_librarypara. |
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212 | //Format: Version |
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213 | const char * description; //Free form. |
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214 | const char * contact; //Format: first ["']nick["'] last (comment) <email>/OpenPGPkey/Phone/Room |
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215 | const char * authors; //Other authors as free form. |
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216 | const char * license; //Format: LicenseName-Version (options) |
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217 | //Examples: GPL-3.0, LGPL-2.1, LGPL-3.0 (or later). |
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218 | }; |
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219 | |
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220 | struct roar_dl_librarydep { |
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221 | int version; |
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222 | size_t len; |
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223 | uint32_t flags; |
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224 | const char * name; |
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225 | const char * libname; |
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226 | const char * abiversion; |
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227 | }; |
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228 | |
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229 | #define ROAR_DL_DEP(__flags,__name,__libname,__abiversion) \ |
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230 | {.version = ROAR_DL_LIBDEP_VERSION, \ |
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231 | .len = sizeof(struct roar_dl_librarydep), \ |
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232 | .flags = __flags, \ |
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233 | .name = __name, \ |
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234 | .libname = __libname, \ |
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235 | .abiversion = __abiversion} |
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236 | |
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237 | struct roar_dl_libraryinst { |
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238 | int version; |
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239 | size_t len; |
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240 | int (*unload)(struct roar_dl_librarypara * para, struct roar_dl_libraryinst * lib); |
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241 | int (*func[ROAR_DL_FN_MAX])(struct roar_dl_librarypara * para, struct roar_dl_libraryinst * lib); |
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242 | struct roar_dl_libraryname * libname; |
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243 | size_t global_data_len; |
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244 | void * global_data_init; |
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245 | void ** global_data_pointer; |
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246 | struct roar_dl_librarydep * libdep; |
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247 | size_t libdep_len; |
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248 | struct roar_dl_appsched * appsched; |
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249 | const char * host_appname; |
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250 | const char * host_abiversion; |
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251 | }; |
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252 | |
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253 | struct roar_dl_appsched { |
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254 | int (*init) (struct roar_dl_librarypara * para); |
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255 | int (*free) (struct roar_dl_librarypara * para); |
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256 | int (*update)(struct roar_dl_librarypara * para); |
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257 | int (*tick) (struct roar_dl_librarypara * para); |
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258 | int (*wait) (struct roar_dl_librarypara * para); |
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259 | }; |
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260 | |
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261 | enum roar_dl_appsched_trigger { |
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262 | ROAR_DL_APPSCHED_INIT = 1, |
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263 | #define ROAR_DL_APPSCHED_INIT ROAR_DL_APPSCHED_INIT |
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264 | ROAR_DL_APPSCHED_FREE, |
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265 | #define ROAR_DL_APPSCHED_FREE ROAR_DL_APPSCHED_FREE |
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266 | ROAR_DL_APPSCHED_UPDATE, |
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267 | #define ROAR_DL_APPSCHED_UPDATE ROAR_DL_APPSCHED_UPDATE |
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268 | ROAR_DL_APPSCHED_TICK, |
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269 | #define ROAR_DL_APPSCHED_TICK ROAR_DL_APPSCHED_TICK |
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270 | ROAR_DL_APPSCHED_WAIT |
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271 | #define ROAR_DL_APPSCHED_WAIT ROAR_DL_APPSCHED_WAIT |
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272 | }; |
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273 | |
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274 | // parameter functions: |
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275 | struct roar_dl_librarypara * roar_dl_para_new(const char * args, void * binargv, |
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276 | const char * appname, const char * abiversion); |
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277 | int roar_dl_para_ref (struct roar_dl_librarypara * para); |
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278 | int roar_dl_para_unref (struct roar_dl_librarypara * para); |
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279 | int roar_dl_para_check_version (struct roar_dl_librarypara * para, |
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280 | const char * appname, const char * abiversion); |
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281 | |
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282 | // 'core' dynamic loader functions. |
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283 | struct roar_dl_lhandle * roar_dl_open (const char * filename, int flags, |
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284 | int ra_init, struct roar_dl_librarypara * para); |
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285 | int roar_dl_ref (struct roar_dl_lhandle * lhandle); |
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286 | int roar_dl_unref (struct roar_dl_lhandle * lhandle); |
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287 | #define roar_dl_close(x) roar_dl_unref((x)) |
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288 | |
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289 | void * roar_dl_getsym (struct roar_dl_lhandle * lhandle, const char * sym, int type); |
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290 | |
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291 | int roar_dl_ra_init(struct roar_dl_lhandle * lhandle, |
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292 | const char * prefix, |
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293 | struct roar_dl_librarypara * para); |
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294 | |
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295 | const char * roar_dl_errstr (struct roar_dl_lhandle * lhandle); |
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296 | |
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297 | // getting meta data: |
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298 | struct roar_dl_librarypara * roar_dl_getpara(struct roar_dl_lhandle * lhandle); |
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299 | const struct roar_dl_libraryname * roar_dl_getlibname(struct roar_dl_lhandle * lhandle); |
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300 | |
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301 | // context switching: |
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302 | // _restore() is to switch from main to library context. _store() is to store library context |
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303 | // and switch back to main context. |
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304 | int roar_dl_context_restore(struct roar_dl_lhandle * lhandle); |
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305 | int roar_dl_context_store(struct roar_dl_lhandle * lhandle); |
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306 | |
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307 | // appsched: |
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308 | int roar_dl_appsched_trigger(struct roar_dl_lhandle * lhandle, enum roar_dl_appsched_trigger trigger); |
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309 | |
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310 | // FN Registration: |
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311 | |
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312 | // Actions objects can emit: |
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313 | enum roar_dl_fnreg_action { |
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314 | ROAR_DL_FNREG = 1, // The object is been registered |
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315 | ROAR_DL_FNUNREG = 2 // The object is been unregistered |
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316 | }; |
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317 | |
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318 | // Callback for registering/unregistering objects: |
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319 | struct roar_dl_fnreg { |
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320 | int fn; // Filter: The FN of the registering object or -1 for any. |
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321 | int subtype; // Filter: The subtype of the registering object or -1 for any. |
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322 | int version; // Filter: The version of the registering object or -1 for any. |
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323 | int (*callback)( // Callback to call on register/unregister. |
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324 | enum roar_dl_fnreg_action action, // The action happening |
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325 | int fn, // The FN of the object |
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326 | int subtype, // The subtype of the object |
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327 | const void * object, // Pointer to the object |
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328 | size_t objectlen, // Length of the object |
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329 | int version, // Version of the object |
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330 | int options, // Object Options. |
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331 | void * userdata, // User data for the callback. |
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332 | struct roar_dl_lhandle * lhandle // The registering handle. |
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333 | // This is valid until the object is unregistered. |
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334 | // Only roar_dl_context_restore(), roar_dl_context_store() |
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335 | // and roar_dl_getpara() may be used on this object. |
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336 | // Result of all other functions is undefined. |
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337 | ); |
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338 | void * userdata; // The user data pointer passed to the callback. |
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339 | }; |
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340 | |
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341 | // Parameters for FNREG registration: |
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342 | #define ROAR_DL_FNREG_SUBTYPE 0 |
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343 | #define ROAR_DL_FNREG_VERSION 0 |
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344 | #define ROAR_DL_FNREG_SIZE sizeof(struct roar_dl_fnreg) |
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345 | |
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346 | |
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347 | // Common protocol interface: |
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348 | struct roar_dl_proto { |
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349 | const int proto; |
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350 | const char * description; |
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351 | const int flags; |
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352 | 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); |
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353 | 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); |
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354 | 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); |
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355 | 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); |
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356 | 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); |
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357 | 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); |
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358 | }; |
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359 | |
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360 | #define ROAR_DL_PROTO_FLAGS_NONE 0 |
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361 | |
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362 | #define ROAR_DL_PROTO_STATUS_RX_READY 0x0001 |
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363 | #define ROAR_DL_PROTO_STATUS_TX_READY 0x0002 |
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364 | #define ROAR_DL_PROTO_STATUS_WAIT_NOTIFY 0x0004 |
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365 | |
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366 | // Parameters for FNREG registration: |
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367 | #define ROAR_DL_PROTO_SUBTYPE 1 /* 0 = roard */ |
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368 | #define ROAR_DL_PROTO_VERSION 0 |
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369 | #define ROAR_DL_PROTO_SIZE sizeof(struct roar_dl_proto) |
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370 | |
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371 | // Reg FN: |
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372 | |
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373 | // Options: |
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374 | #define ROAR_DL_FNREG_OPT_NONE 0 /* no options */ |
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375 | |
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376 | // Register an FN. |
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377 | int roar_dl_register_fn(struct roar_dl_lhandle * lhandle, int fn, int subtype, const void * object, size_t objectlen, int version, int options); |
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378 | |
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379 | // Unregister FN for the given plugin. |
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380 | // This should not be called directly and is called internally when needed. |
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381 | int roar_dl_unregister_fn(struct roar_dl_lhandle * lhandle); |
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382 | |
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383 | #endif |
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384 | |
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385 | //ll |
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