src/plugins/InstrumentEditorFactory.cpp

/***************************************************************************
 *                                                                         *
 *   Copyright (C) 2007 - 2009 Christian Schoenebeck                       *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 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 General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "InstrumentEditorFactory.h"

#include "../common/global_private.h"
#include "../Sampler.h"

#if defined(WIN32)
#include <windows.h>
#else
#include <dlfcn.h>
#include <errno.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#endif
#include <string.h>

#ifndef CONFIG_PLUGIN_DIR
# error "Configuration macro CONFIG_PLUGIN_DIR not defined!"
#endif // CONFIG_PLUGIN_DIR

namespace LinuxSampler {

    std::map<String, InstrumentEditorFactory::InnerFactory*> InstrumentEditorFactory::InnerFactories;

    bool InstrumentEditorFactory::bPluginsLoaded = false;

    std::list<void*> InstrumentEditorFactory::LoadedDLLs;

    std::vector<String> InstrumentEditorFactory::AvailableEditors() {
        // make sure plugins were loaded already
        LoadPlugins();
        // render result
        std::vector<String> result;
        std::map<String, InnerFactory*>::iterator iter = InnerFactories.begin();
        for (; iter != InnerFactories.end(); iter++)
            result.push_back(iter->first);
        return result;
    }

    std::vector<String> InstrumentEditorFactory::MatchingEditors(String sTypeName, String sTypeVersion) {
        // make sure plugins were loaded already
        LoadPlugins();
        // render result
        std::vector<String> result;
        std::map<String, InnerFactory*>::iterator iter = InnerFactories.begin();
        for (; iter != InnerFactories.end(); iter++) {
            InstrumentEditor* pEditor = iter->second->Create();
            if (pEditor->IsTypeSupported(sTypeName, sTypeVersion))
                result.push_back(iter->first);
            iter->second->Destroy(pEditor);
        }
        return result;
    }

    String InstrumentEditorFactory::AvailableEditorsAsString() {
        std::vector<String> drivers = AvailableEditors();
        String result;
        std::vector<String>::iterator iter = drivers.begin();
        for (; iter != drivers.end(); iter++) {
            if (result != "") result += ",";
            result += "'" + *iter + "'";
        }
        return result;
    }

    InstrumentEditor* InstrumentEditorFactory::Create(String InstrumentEditorName) throw (Exception) {
        if (InnerFactories.count(InstrumentEditorName)) {
            InnerFactory* pInnerFactory = InnerFactories[InstrumentEditorName];
            return pInnerFactory->Create();
        } else throw Exception("unknown instrument editor");
    }

    void InstrumentEditorFactory::Destroy(InstrumentEditor* pInstrumentEditor) throw (Exception) {
        if (InnerFactories.count(pInstrumentEditor->Name())) {
            InnerFactory* pInnerFactory = InnerFactories[pInstrumentEditor->Name()];
            return pInnerFactory->Destroy(pInstrumentEditor);
        } else throw Exception("unknown instrument editor");
    }

    void InstrumentEditorFactory::LoadPlugins() {
        if (!bPluginsLoaded) {
            dmsg(1,("Loading instrument editor plugins..."));
            #if defined(WIN32)
            String dir = Sampler::GetInstallDir();

            // Put the LS installation directory first in DLL search
            // path, so the plugin finds for example the bundled GTK
            // libraries before any other installed versions
            if (!dir.empty()) {
                // The SetDllDirectory function is only available on
                // XP and higher, so we call it dynamically
                HMODULE k32 = GetModuleHandleA("kernel32.dll");
                if (k32) {
                    BOOL WINAPI (*setDllDirectory)(LPCSTR) =
                        (BOOL WINAPI (*)(LPCSTR))GetProcAddress(k32, "SetDllDirectoryA");
                    if (setDllDirectory) {
                        setDllDirectory(dir.c_str());
                    }
                }
            }

            if (dir.empty() || !LoadPlugins(dir + "\\plugins")) {
                if (!LoadPlugins(CONFIG_PLUGIN_DIR)) {
                    std::cerr << "Could not open instrument editor plugins "
                              << "directory (" << dir << "\\plugins or "
                              << CONFIG_PLUGIN_DIR << "), Error: "
                              << GetLastError() << std::endl;
                    return;
                }
            }
            #else
            if (!LoadPlugins(CONFIG_PLUGIN_DIR)) {
                std::cerr << "Could not open instrument editor plugins "
                          << "directory (" << CONFIG_PLUGIN_DIR << "): "
                          << strerror(errno) << std::endl;
                return;
            }
            #endif
            bPluginsLoaded = true;
            dmsg(1,("OK\n"));
        }
    }

    bool InstrumentEditorFactory::LoadPlugins(String plugindir) {
        #if defined(WIN32)
        WIN32_FIND_DATA win32FindData;
        const String pluginpattern = plugindir + "\\*.dll";
        HANDLE hDir = FindFirstFile(pluginpattern.c_str(), &win32FindData);
        if (hDir == INVALID_HANDLE_VALUE) {
            if (GetLastError() != ERROR_FILE_NOT_FOUND) {
                return false;
            } else {
                dmsg(1,("None"));
                return true;
            }
        }

        do {
            // skip directory entries
            if (win32FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
                continue;
            // dir entry name as full qualified path
            const String sPath = plugindir + "\\" + win32FindData.cFileName;
            // load the DLL
            HINSTANCE hinstLib;
            void* pDLL = hinstLib = LoadLibrary(sPath.c_str());
            if (!pDLL) {
                std::cerr << "Failed to load instrument editor plugin: "
                          << sPath << std::endl;
                continue;
            }

            InnerFactory* (*fn)() = (InnerFactory* (*)())
                GetProcAddress(hinstLib, "createInstrumentEditorInnerFactory");
            if (fn == NULL) {
                std::cerr << "ERROR: unable to find "
                             "createInstrumentEditorInnerFactory() "
                             "in DLL\n" << std::flush;
                FreeLibrary(hinstLib);
                continue;
            }

            // get the plugin instance and register it to the factory

            InnerFactory* pInnerFactory = fn();
            if (!pInnerFactory) {
                std::cerr << "ERROR: !pInnerFactory\n" << std::flush;
                FreeLibrary(hinstLib);
                continue;
            }
            InstrumentEditor* pEditor = pInnerFactory->Create();
            if (InnerFactories.count(pEditor->Name())) {
                std::cerr << "ERROR: a plugin with name '"
                          << pEditor->Name()
                          << "' already loaded (skipping)\n"
                          << std::flush;
                pInnerFactory->Destroy(pEditor);
                FreeLibrary(hinstLib);
                continue;
            }
            InnerFactories[pEditor->Name()] = pInnerFactory;
            pInnerFactory->Destroy(pEditor);

            LoadedDLLs.push_back(pDLL);
        } while (FindNextFile(hDir, &win32FindData));

        if (hDir != INVALID_HANDLE_VALUE) FindClose(hDir);

        #else // POSIX

        #if defined(__APPLE__)  /*  20071224 Toshi Nagata  */
        if (plugindir.find("~") == 0)
            plugindir.replace(0, 1, getenv("HOME"));
        #endif
        DIR* hDir = opendir(plugindir.c_str());
        if (!hDir) {
            return false;
        }
        for (dirent* pEntry = readdir(hDir); pEntry; pEntry = readdir(hDir)) {
            // dir entry name as full qualified path
            const String sPath = plugindir + "/" + pEntry->d_name;
            // skip entries that are not regular files
            struct stat entry_stat;
            if (lstat(sPath.c_str(), &entry_stat) != 0 ||
                (entry_stat.st_mode & S_IFMT) != S_IFREG)
                continue;
            // skip files that are not .so files
            if (sPath.length() < 3 ||
                sPath.substr(sPath.length() - 3) != ".so" &&
                sPath.find(".so.") == String::npos)
                continue;
            // load the DLL (the plugins should register themselfes automatically)
            void* pDLL = dlopen(sPath.c_str(), RTLD_NOW);
            if (pDLL) LoadedDLLs.push_back(pDLL);
            else {
                std::cerr << "Failed to load instrument editor plugin: '"
                          << sPath << "', cause: " << dlerror() << std::endl;
            }
        }
        closedir(hDir);
        #endif
        return true;
    }

    void InstrumentEditorFactory::ClosePlugins() {
        if (LoadedDLLs.size()) {
            dmsg(1,("Unloading instrument editor plugins..."));
            // free all inner factories
            {
                std::map<String, InnerFactory*>::iterator iter = InnerFactories.begin();
                for (; iter != InnerFactories.end(); iter++) delete iter->second;
                InnerFactories.clear();
            }
            // free the DLLs
            {
                std::list<void*>::iterator iter = LoadedDLLs.begin();
                for (; iter != LoadedDLLs.end(); iter++) {
                    #if defined(WIN32)
                    FreeLibrary((HINSTANCE)*iter);
                    #else
                    dlclose(*iter);
                    #endif
                }
                LoadedDLLs.clear();
                dmsg(1,("OK\n"));
            }
        }
        bPluginsLoaded = false;
    }

} // namespace LinuxSampler
1	schoenebeck	1374	/***************************************************************************
2			* *
3	persson	1897	* Copyright (C) 2007 - 2009 Christian Schoenebeck *
4	schoenebeck	1374	* *
5			* This program is free software; you can redistribute it and/or modify *
6			* it under the terms of the GNU General Public License as published by *
7			* the Free Software Foundation; either version 2 of the License, or *
8			* (at your option) any later version. *
9			* *
10			* This program is distributed in the hope that it will be useful, *
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13			* GNU General Public License for more details. *
14			* *
15			* You should have received a copy of the GNU General Public License *
16			* along with this program; if not, write to the Free Software *
17			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
18			* MA 02111-1307 USA *
19			***************************************************************************/
20
21			#include "InstrumentEditorFactory.h"
22
23	schoenebeck	1425	#include "../common/global_private.h"
24	persson	1897	#include "../Sampler.h"
25	schoenebeck	1425
26	senoner	1478	#if defined(WIN32)
27			#include <windows.h>
28			#else
29	schoenebeck	1374	#include <dlfcn.h>
30			#include <errno.h>
31	senoner	1478	#include <dirent.h>
32	schoenebeck	1601	#include <sys/types.h>
33			#include <sys/stat.h>
34			#include <unistd.h>
35	senoner	1478	#endif
36	schoenebeck	1374	#include <string.h>
37
38			#ifndef CONFIG_PLUGIN_DIR
39			# error "Configuration macro CONFIG_PLUGIN_DIR not defined!"
40			#endif // CONFIG_PLUGIN_DIR
41
42			namespace LinuxSampler {
43
44			std::map<String, InstrumentEditorFactory::InnerFactory*> InstrumentEditorFactory::InnerFactories;
45
46			bool InstrumentEditorFactory::bPluginsLoaded = false;
47
48			std::list<void*> InstrumentEditorFactory::LoadedDLLs;
49
50			std::vector<String> InstrumentEditorFactory::AvailableEditors() {
51			// make sure plugins were loaded already
52			LoadPlugins();
53			// render result
54			std::vector<String> result;
55			std::map<String, InnerFactory*>::iterator iter = InnerFactories.begin();
56			for (; iter != InnerFactories.end(); iter++)
57			result.push_back(iter->first);
58			return result;
59			}
60
61			std::vector<String> InstrumentEditorFactory::MatchingEditors(String sTypeName, String sTypeVersion) {
62			// make sure plugins were loaded already
63			LoadPlugins();
64			// render result
65			std::vector<String> result;
66			std::map<String, InnerFactory*>::iterator iter = InnerFactories.begin();
67			for (; iter != InnerFactories.end(); iter++) {
68			InstrumentEditor* pEditor = iter->second->Create();
69			if (pEditor->IsTypeSupported(sTypeName, sTypeVersion))
70			result.push_back(iter->first);
71			iter->second->Destroy(pEditor);
72			}
73			return result;
74			}
75
76			String InstrumentEditorFactory::AvailableEditorsAsString() {
77			std::vector<String> drivers = AvailableEditors();
78			String result;
79			std::vector<String>::iterator iter = drivers.begin();
80			for (; iter != drivers.end(); iter++) {
81			if (result != "") result += ",";
82			result += "'" + *iter + "'";
83			}
84			return result;
85			}
86
87			InstrumentEditor* InstrumentEditorFactory::Create(String InstrumentEditorName) throw (Exception) {
88			if (InnerFactories.count(InstrumentEditorName)) {
89			InnerFactory* pInnerFactory = InnerFactories[InstrumentEditorName];
90			return pInnerFactory->Create();
91			} else throw Exception("unknown instrument editor");
92			}
93
94			void InstrumentEditorFactory::Destroy(InstrumentEditor* pInstrumentEditor) throw (Exception) {
95			if (InnerFactories.count(pInstrumentEditor->Name())) {
96			InnerFactory* pInnerFactory = InnerFactories[pInstrumentEditor->Name()];
97			return pInnerFactory->Destroy(pInstrumentEditor);
98			} else throw Exception("unknown instrument editor");
99			}
100
101			void InstrumentEditorFactory::LoadPlugins() {
102			if (!bPluginsLoaded) {
103			dmsg(1,("Loading instrument editor plugins..."));
104	senoner	1478	#if defined(WIN32)
105	persson	1897	String dir = Sampler::GetInstallDir();
106	persson	1951
107			// Put the LS installation directory first in DLL search
108			// path, so the plugin finds for example the bundled GTK
109			// libraries before any other installed versions
110			if (!dir.empty()) {
111			// The SetDllDirectory function is only available on
112			// XP and higher, so we call it dynamically
113			HMODULE k32 = GetModuleHandleA("kernel32.dll");
114			if (k32) {
115			BOOL WINAPI (*setDllDirectory)(LPCSTR) =
116			(BOOL WINAPI (*)(LPCSTR))GetProcAddress(k32, "SetDllDirectoryA");
117			if (setDllDirectory) {
118			setDllDirectory(dir.c_str());
119			}
120			}
121			}
122
123	persson	1897	if (dir.empty() \|\| !LoadPlugins(dir + "\\plugins")) {
124			if (!LoadPlugins(CONFIG_PLUGIN_DIR)) {
125	schoenebeck	1602	std::cerr << "Could not open instrument editor plugins "
126	persson	1897	<< "directory (" << dir << "\\plugins or "
127			<< CONFIG_PLUGIN_DIR << "), Error: "
128			<< GetLastError() << std::endl;
129			return;
130	senoner	1478	}
131	persson	1897	}
132			#else
133			if (!LoadPlugins(CONFIG_PLUGIN_DIR)) {
134			std::cerr << "Could not open instrument editor plugins "
135			<< "directory (" << CONFIG_PLUGIN_DIR << "): "
136			<< strerror(errno) << std::endl;
137	schoenebeck	1602	return;
138	senoner	1478	}
139	persson	1897	#endif
140			bPluginsLoaded = true;
141			dmsg(1,("OK\n"));
142			}
143			}
144	senoner	1478
145	persson	1897	bool InstrumentEditorFactory::LoadPlugins(String plugindir) {
146			#if defined(WIN32)
147			WIN32_FIND_DATA win32FindData;
148			const String pluginpattern = plugindir + "\\*.dll";
149			HANDLE hDir = FindFirstFile(pluginpattern.c_str(), &win32FindData);
150			if (hDir == INVALID_HANDLE_VALUE) {
151			if (GetLastError() != ERROR_FILE_NOT_FOUND) {
152			return false;
153			} else {
154			dmsg(1,("None"));
155			return true;
156			}
157			}
158	schoenebeck	1602
159	persson	1897	do {
160			// skip directory entries
161			if (win32FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
162			continue;
163			// dir entry name as full qualified path
164			const String sPath = plugindir + "\\" + win32FindData.cFileName;
165			// load the DLL
166			HINSTANCE hinstLib;
167			void* pDLL = hinstLib = LoadLibrary(sPath.c_str());
168			if (!pDLL) {
169			std::cerr << "Failed to load instrument editor plugin: "
170			<< sPath << std::endl;
171			continue;
172			}
173	schoenebeck	1602
174	persson	1897	InnerFactory* (fn)() = (InnerFactory (*)())
175			GetProcAddress(hinstLib, "createInstrumentEditorInnerFactory");
176			if (fn == NULL) {
177			std::cerr << "ERROR: unable to find "
178			"createInstrumentEditorInnerFactory() "
179			"in DLL\n" << std::flush;
180			FreeLibrary(hinstLib);
181			continue;
182			}
183	schoenebeck	1602
184	persson	1897	// get the plugin instance and register it to the factory
185	schoenebeck	1602
186	persson	1897	InnerFactory* pInnerFactory = fn();
187			if (!pInnerFactory) {
188			std::cerr << "ERROR: !pInnerFactory\n" << std::flush;
189			FreeLibrary(hinstLib);
190			continue;
191	schoenebeck	1374	}
192	persson	1897	InstrumentEditor* pEditor = pInnerFactory->Create();
193			if (InnerFactories.count(pEditor->Name())) {
194			std::cerr << "ERROR: a plugin with name '"
195			<< pEditor->Name()
196			<< "' already loaded (skipping)\n"
197			<< std::flush;
198			pInnerFactory->Destroy(pEditor);
199			FreeLibrary(hinstLib);
200			continue;
201	schoenebeck	1374	}
202	persson	1897	InnerFactories[pEditor->Name()] = pInnerFactory;
203			pInnerFactory->Destroy(pEditor);
204
205			LoadedDLLs.push_back(pDLL);
206			} while (FindNextFile(hDir, &win32FindData));
207
208			if (hDir != INVALID_HANDLE_VALUE) FindClose(hDir);
209
210			#else // POSIX
211
212			#if defined(__APPLE__) /* 20071224 Toshi Nagata */
213			if (plugindir.find("~") == 0)
214			plugindir.replace(0, 1, getenv("HOME"));
215			#endif
216			DIR* hDir = opendir(plugindir.c_str());
217			if (!hDir) {
218			return false;
219	schoenebeck	1374	}
220	persson	1897	for (dirent* pEntry = readdir(hDir); pEntry; pEntry = readdir(hDir)) {
221			// dir entry name as full qualified path
222			const String sPath = plugindir + "/" + pEntry->d_name;
223			// skip entries that are not regular files
224			struct stat entry_stat;
225			if (lstat(sPath.c_str(), &entry_stat) != 0 \|\|
226			(entry_stat.st_mode & S_IFMT) != S_IFREG)
227			continue;
228			// skip files that are not .so files
229			if (sPath.length() < 3 \|\|
230			sPath.substr(sPath.length() - 3) != ".so" &&
231			sPath.find(".so.") == String::npos)
232			continue;
233			// load the DLL (the plugins should register themselfes automatically)
234			void* pDLL = dlopen(sPath.c_str(), RTLD_NOW);
235			if (pDLL) LoadedDLLs.push_back(pDLL);
236			else {
237			std::cerr << "Failed to load instrument editor plugin: '"
238			<< sPath << "', cause: " << dlerror() << std::endl;
239			}
240			}
241			closedir(hDir);
242			#endif
243			return true;
244	schoenebeck	1374	}
245
246			void InstrumentEditorFactory::ClosePlugins() {
247			if (LoadedDLLs.size()) {
248			dmsg(1,("Unloading instrument editor plugins..."));
249			// free all inner factories
250			{
251			std::map<String, InnerFactory*>::iterator iter = InnerFactories.begin();
252			for (; iter != InnerFactories.end(); iter++) delete iter->second;
253			InnerFactories.clear();
254			}
255			// free the DLLs
256			{
257			std::list<void*>::iterator iter = LoadedDLLs.begin();
258	senoner	1478	for (; iter != LoadedDLLs.end(); iter++) {
259			#if defined(WIN32)
260			FreeLibrary((HINSTANCE)*iter);
261			#else
262			dlclose(*iter);
263			#endif
264			}
265	schoenebeck	1374	LoadedDLLs.clear();
266			dmsg(1,("OK\n"));
267			}
268			}
269			bPluginsLoaded = false;
270			}
271
272			} // namespace LinuxSampler