router/router.cpp

   1
   2 #include "config.h"
   3
   4 #include "router.h"
   5
   6 #include <algorithm>
   7 #include <cstdio>
   8 #include <cstdlib>
   9 #include <cstring>
  10
  11 #include "AL/alc.h"
  12 #include "AL/al.h"
  13
  14 #include "almalloc.h"
  15 #include "strutils.h"
  16
  17 #include "version.h"
  18
  19
  20 std::vector<DriverIface> DriverList;
  21
  22 thread_local DriverIface *ThreadCtxDriver;
  23
  24 enum LogLevel LogLevel = LogLevel_Error;
  25 FILE *LogFile;
  26
  27 #ifdef __MINGW32__
  28 DriverIface *GetThreadDriver() noexcept { return ThreadCtxDriver; }
  29 void SetThreadDriver(DriverIface *driver) noexcept { ThreadCtxDriver = driver; }
  30 #endif
  31
  32 static void LoadDriverList(void);
  33
  34
  35 BOOL APIENTRY DllMain(HINSTANCE, DWORD reason, void*)
  36 {
  37     switch(reason)
  38     {
  39     case DLL_PROCESS_ATTACH:
  40         LogFile = stderr;
  41         if(auto logfname = al::getenv("ALROUTER_LOGFILE"))
  42         {
  43             FILE *f = fopen(logfname->c_str(), "w");
  44             if(f == nullptr)
  45                 ERR("Could not open log file: %s\n", logfname->c_str());
  46             else
  47                 LogFile = f;
  48         }
  49         if(auto loglev = al::getenv("ALROUTER_LOGLEVEL"))
  50         {
  51             char *end = nullptr;
  52             long l = strtol(loglev->c_str(), &end, 0);
  53             if(!end || *end != '\0')
  54                 ERR("Invalid log level value: %s\n", loglev->c_str());
  55             else if(l < LogLevel_None || l > LogLevel_Trace)
  56                 ERR("Log level out of range: %s\n", loglev->c_str());
  57             else
  58                 LogLevel = static_cast<enum LogLevel>(l);
  59         }
  60         TRACE("Initializing router v0.1-%s %s\n", ALSOFT_GIT_COMMIT_HASH, ALSOFT_GIT_BRANCH);
  61         LoadDriverList();
  62
  63         break;
  64
  65     case DLL_THREAD_ATTACH:
  66         break;
  67     case DLL_THREAD_DETACH:
  68         break;
  69
  70     case DLL_PROCESS_DETACH:
  71         DriverList.clear();
  72
  73         if(LogFile && LogFile != stderr)
  74             fclose(LogFile);
  75         LogFile = nullptr;
  76
  77         break;
  78     }
  79     return TRUE;
  80 }
  81
  82
  83 static void AddModule(HMODULE module, const WCHAR *name)
  84 {
  85     for(auto &drv : DriverList)
  86     {
  87         if(drv.Module == module)
  88         {
  89             TRACE("Skipping already-loaded module %p\n", decltype(std::declval<void*>()){module});
  90             FreeLibrary(module);
  91             return;
  92         }
  93         if(drv.Name == name)
  94         {
  95             TRACE("Skipping similarly-named module %ls\n", name);
  96             FreeLibrary(module);
  97             return;
  98         }
  99     }
 100
 101     DriverList.emplace_back(name, module);
 102     DriverIface &newdrv = DriverList.back();
 103
 104     /* Load required functions. */
 105     int err = 0;
 106 #define LOAD_PROC(x) do {                                                     \
 107     newdrv.x = reinterpret_cast<decltype(newdrv.x)>(reinterpret_cast<void*>(  \
 108         GetProcAddress(module, #x)));                                         \
 109     if(!newdrv.x)                                                             \
 110     {                                                                         \
 111         ERR("Failed to find entry point for %s in %ls\n", #x, name);          \
 112         err = 1;                                                              \
 113     }                                                                         \
 114 } while(0)
 115     LOAD_PROC(alcCreateContext);
 116     LOAD_PROC(alcMakeContextCurrent);
 117     LOAD_PROC(alcProcessContext);
 118     LOAD_PROC(alcSuspendContext);
 119     LOAD_PROC(alcDestroyContext);
 120     LOAD_PROC(alcGetCurrentContext);
 121     LOAD_PROC(alcGetContextsDevice);
 122     LOAD_PROC(alcOpenDevice);
 123     LOAD_PROC(alcCloseDevice);
 124     LOAD_PROC(alcGetError);
 125     LOAD_PROC(alcIsExtensionPresent);
 126     LOAD_PROC(alcGetProcAddress);
 127     LOAD_PROC(alcGetEnumValue);
 128     LOAD_PROC(alcGetString);
 129     LOAD_PROC(alcGetIntegerv);
 130     LOAD_PROC(alcCaptureOpenDevice);
 131     LOAD_PROC(alcCaptureCloseDevice);
 132     LOAD_PROC(alcCaptureStart);
 133     LOAD_PROC(alcCaptureStop);
 134     LOAD_PROC(alcCaptureSamples);
 135
 136     LOAD_PROC(alEnable);
 137     LOAD_PROC(alDisable);
 138     LOAD_PROC(alIsEnabled);
 139     LOAD_PROC(alGetString);
 140     LOAD_PROC(alGetBooleanv);
 141     LOAD_PROC(alGetIntegerv);
 142     LOAD_PROC(alGetFloatv);
 143     LOAD_PROC(alGetDoublev);
 144     LOAD_PROC(alGetBoolean);
 145     LOAD_PROC(alGetInteger);
 146     LOAD_PROC(alGetFloat);
 147     LOAD_PROC(alGetDouble);
 148     LOAD_PROC(alGetError);
 149     LOAD_PROC(alIsExtensionPresent);
 150     LOAD_PROC(alGetProcAddress);
 151     LOAD_PROC(alGetEnumValue);
 152     LOAD_PROC(alListenerf);
 153     LOAD_PROC(alListener3f);
 154     LOAD_PROC(alListenerfv);
 155     LOAD_PROC(alListeneri);
 156     LOAD_PROC(alListener3i);
 157     LOAD_PROC(alListeneriv);
 158     LOAD_PROC(alGetListenerf);
 159     LOAD_PROC(alGetListener3f);
 160     LOAD_PROC(alGetListenerfv);
 161     LOAD_PROC(alGetListeneri);
 162     LOAD_PROC(alGetListener3i);
 163     LOAD_PROC(alGetListeneriv);
 164     LOAD_PROC(alGenSources);
 165     LOAD_PROC(alDeleteSources);
 166     LOAD_PROC(alIsSource);
 167     LOAD_PROC(alSourcef);
 168     LOAD_PROC(alSource3f);
 169     LOAD_PROC(alSourcefv);
 170     LOAD_PROC(alSourcei);
 171     LOAD_PROC(alSource3i);
 172     LOAD_PROC(alSourceiv);
 173     LOAD_PROC(alGetSourcef);
 174     LOAD_PROC(alGetSource3f);
 175     LOAD_PROC(alGetSourcefv);
 176     LOAD_PROC(alGetSourcei);
 177     LOAD_PROC(alGetSource3i);
 178     LOAD_PROC(alGetSourceiv);
 179     LOAD_PROC(alSourcePlayv);
 180     LOAD_PROC(alSourceStopv);
 181     LOAD_PROC(alSourceRewindv);
 182     LOAD_PROC(alSourcePausev);
 183     LOAD_PROC(alSourcePlay);
 184     LOAD_PROC(alSourceStop);
 185     LOAD_PROC(alSourceRewind);
 186     LOAD_PROC(alSourcePause);
 187     LOAD_PROC(alSourceQueueBuffers);
 188     LOAD_PROC(alSourceUnqueueBuffers);
 189     LOAD_PROC(alGenBuffers);
 190     LOAD_PROC(alDeleteBuffers);
 191     LOAD_PROC(alIsBuffer);
 192     LOAD_PROC(alBufferf);
 193     LOAD_PROC(alBuffer3f);
 194     LOAD_PROC(alBufferfv);
 195     LOAD_PROC(alBufferi);
 196     LOAD_PROC(alBuffer3i);
 197     LOAD_PROC(alBufferiv);
 198     LOAD_PROC(alGetBufferf);
 199     LOAD_PROC(alGetBuffer3f);
 200     LOAD_PROC(alGetBufferfv);
 201     LOAD_PROC(alGetBufferi);
 202     LOAD_PROC(alGetBuffer3i);
 203     LOAD_PROC(alGetBufferiv);
 204     LOAD_PROC(alBufferData);
 205     LOAD_PROC(alDopplerFactor);
 206     LOAD_PROC(alDopplerVelocity);
 207     LOAD_PROC(alSpeedOfSound);
 208     LOAD_PROC(alDistanceModel);
 209     if(!err)
 210     {
 211         ALCint alc_ver[2] = { 0, 0 };
 212         newdrv.alcGetIntegerv(nullptr, ALC_MAJOR_VERSION, 1, &alc_ver[0]);
 213         newdrv.alcGetIntegerv(nullptr, ALC_MINOR_VERSION, 1, &alc_ver[1]);
 214         if(newdrv.alcGetError(nullptr) == ALC_NO_ERROR)
 215             newdrv.ALCVer = MAKE_ALC_VER(alc_ver[0], alc_ver[1]);
 216         else
 217         {
 218             WARN("Failed to query ALC version for %ls, assuming 1.0\n", name);
 219             newdrv.ALCVer = MAKE_ALC_VER(1, 0);
 220         }
 221
 222 #undef LOAD_PROC
 223 #define LOAD_PROC(x) do {                                                     \
 224     newdrv.x = reinterpret_cast<decltype(newdrv.x)>(                          \
 225         newdrv.alcGetProcAddress(nullptr, #x));                               \
 226     if(!newdrv.x)                                                             \
 227     {                                                                         \
 228         ERR("Failed to find entry point for %s in %ls\n", #x, name);          \
 229         err = 1;                                                              \
 230     }                                                                         \
 231 } while(0)
 232         if(newdrv.alcIsExtensionPresent(nullptr, "ALC_EXT_thread_local_context"))
 233         {
 234             LOAD_PROC(alcSetThreadContext);
 235             LOAD_PROC(alcGetThreadContext);
 236         }
 237     }
 238
 239     if(err)
 240     {
 241         DriverList.pop_back();
 242         return;
 243     }
 244     TRACE("Loaded module %p, %ls, ALC %d.%d\n", decltype(std::declval<void*>()){module}, name,
 245           newdrv.ALCVer>>8, newdrv.ALCVer&255);
 246 #undef LOAD_PROC
 247 }
 248
 249 static void SearchDrivers(WCHAR *path)
 250 {
 251     WIN32_FIND_DATAW fdata;
 252
 253     TRACE("Searching for drivers in %ls...\n", path);
 254     std::wstring srchPath = path;
 255     srchPath += L"\\*oal.dll";
 256
 257     HANDLE srchHdl = FindFirstFileW(srchPath.c_str(), &fdata);
 258     if(srchHdl != INVALID_HANDLE_VALUE)
 259     {
 260         do {
 261             HMODULE mod;
 262
 263             srchPath = path;
 264             srchPath += L"\\";
 265             srchPath += fdata.cFileName;
 266             TRACE("Found %ls\n", srchPath.c_str());
 267
 268             mod = LoadLibraryW(srchPath.c_str());
 269             if(!mod)
 270                 WARN("Could not load %ls\n", srchPath.c_str());
 271             else
 272                 AddModule(mod, fdata.cFileName);
 273         } while(FindNextFileW(srchHdl, &fdata));
 274         FindClose(srchHdl);
 275     }
 276 }
 277
 278 static WCHAR *strrchrW(WCHAR *str, WCHAR ch)
 279 {
 280     WCHAR *res = nullptr;
 281     while(str && *str != '\0')
 282     {
 283         if(*str == ch)
 284             res = str;
 285         ++str;
 286     }
 287     return res;
 288 }
 289
 290 static int GetLoadedModuleDirectory(const WCHAR *name, WCHAR *moddir, DWORD length)
 291 {
 292     HMODULE module = nullptr;
 293     WCHAR *sep0, *sep1;
 294
 295     if(name)
 296     {
 297         module = GetModuleHandleW(name);
 298         if(!module) return 0;
 299     }
 300
 301     if(GetModuleFileNameW(module, moddir, length) == 0)
 302         return 0;
 303
 304     sep0 = strrchrW(moddir, '/');
 305     if(sep0) sep1 = strrchrW(sep0+1, '\\');
 306     else sep1 = strrchrW(moddir, '\\');
 307
 308     if(sep1) *sep1 = '\0';
 309     else if(sep0) *sep0 = '\0';
 310     else *moddir = '\0';
 311
 312     return 1;
 313 }
 314
 315 void LoadDriverList(void)
 316 {
 317     WCHAR dll_path[MAX_PATH+1] = L"";
 318     WCHAR cwd_path[MAX_PATH+1] = L"";
 319     WCHAR proc_path[MAX_PATH+1] = L"";
 320     WCHAR sys_path[MAX_PATH+1] = L"";
 321     int len;
 322
 323     if(GetLoadedModuleDirectory(L"OpenAL32.dll", dll_path, MAX_PATH))
 324         TRACE("Got DLL path %ls\n", dll_path);
 325
 326     GetCurrentDirectoryW(MAX_PATH, cwd_path);
 327     len = lstrlenW(cwd_path);
 328     if(len > 0 && (cwd_path[len-1] == '\\' || cwd_path[len-1] == '/'))
 329         cwd_path[len-1] = '\0';
 330     TRACE("Got current working directory %ls\n", cwd_path);
 331
 332     if(GetLoadedModuleDirectory(nullptr, proc_path, MAX_PATH))
 333         TRACE("Got proc path %ls\n", proc_path);
 334
 335     GetSystemDirectoryW(sys_path, MAX_PATH);
 336     len = lstrlenW(sys_path);
 337     if(len > 0 && (sys_path[len-1] == '\\' || sys_path[len-1] == '/'))
 338         sys_path[len-1] = '\0';
 339     TRACE("Got system path %ls\n", sys_path);
 340
 341     /* Don't search the DLL's path if it is the same as the current working
 342      * directory, app's path, or system path (don't want to do duplicate
 343      * searches, or increase the priority of the app or system path).
 344      */
 345     if(dll_path[0] &&
 346        (!cwd_path[0] || wcscmp(dll_path, cwd_path) != 0) &&
 347        (!proc_path[0] || wcscmp(dll_path, proc_path) != 0) &&
 348        (!sys_path[0] || wcscmp(dll_path, sys_path) != 0))
 349         SearchDrivers(dll_path);
 350     if(cwd_path[0] &&
 351        (!proc_path[0] || wcscmp(cwd_path, proc_path) != 0) &&
 352        (!sys_path[0] || wcscmp(cwd_path, sys_path) != 0))
 353         SearchDrivers(cwd_path);
 354     if(proc_path[0] && (!sys_path[0] || wcscmp(proc_path, sys_path) != 0))
 355         SearchDrivers(proc_path);
 356     if(sys_path[0])
 357         SearchDrivers(sys_path);
 358 }
 359
 360
 361 PtrIntMap::~PtrIntMap()
 362 {
 363     std::lock_guard<std::mutex> maplock{mLock};
 364     al_free(mKeys);
 365     mKeys = nullptr;
 366     mValues = nullptr;
 367     mSize = 0;
 368     mCapacity = 0;
 369 }
 370
 371 ALenum PtrIntMap::insert(void *key, int value)
 372 {
 373     std::lock_guard<std::mutex> maplock{mLock};
 374     auto iter = std::lower_bound(mKeys, mKeys+mSize, key);
 375     auto pos = static_cast<ALsizei>(std::distance(mKeys, iter));
 376
 377     if(pos == mSize || mKeys[pos] != key)
 378     {
 379         if(mSize == mCapacity)
 380         {
 381             void **newkeys{nullptr};
 382             ALsizei newcap{mCapacity ? (mCapacity<<1) : 4};
 383             if(newcap > mCapacity)
 384                 newkeys = static_cast<void**>(
 385                     al_calloc(16, (sizeof(mKeys[0])+sizeof(mValues[0]))*newcap)
 386                 );
 387             if(!newkeys)
 388                 return AL_OUT_OF_MEMORY;
 389             auto newvalues = reinterpret_cast<int*>(&newkeys[newcap]);
 390
 391             if(mKeys)
 392             {
 393                 std::copy_n(mKeys, mSize, newkeys);
 394                 std::copy_n(mValues, mSize, newvalues);
 395             }
 396             al_free(mKeys);
 397             mKeys = newkeys;
 398             mValues = newvalues;
 399             mCapacity = newcap;
 400         }
 401
 402         if(pos < mSize)
 403         {
 404             std::copy_backward(mKeys+pos, mKeys+mSize, mKeys+mSize+1);
 405             std::copy_backward(mValues+pos, mValues+mSize, mValues+mSize+1);
 406         }
 407         mSize++;
 408     }
 409     mKeys[pos] = key;
 410     mValues[pos] = value;
 411
 412     return AL_NO_ERROR;
 413 }
 414
 415 int PtrIntMap::removeByKey(void *key)
 416 {
 417     int ret = -1;
 418
 419     std::lock_guard<std::mutex> maplock{mLock};
 420     auto iter = std::lower_bound(mKeys, mKeys+mSize, key);
 421     auto pos = static_cast<ALsizei>(std::distance(mKeys, iter));
 422     if(pos < mSize && mKeys[pos] == key)
 423     {
 424         ret = mValues[pos];
 425         if(pos+1 < mSize)
 426         {
 427             std::copy(mKeys+pos+1, mKeys+mSize, mKeys+pos);
 428             std::copy(mValues+pos+1, mValues+mSize, mValues+pos);
 429         }
 430         mSize--;
 431     }
 432
 433     return ret;
 434 }
 435
 436 int PtrIntMap::lookupByKey(void *key)
 437 {
 438     int ret = -1;
 439
 440     std::lock_guard<std::mutex> maplock{mLock};
 441     auto iter = std::lower_bound(mKeys, mKeys+mSize, key);
 442     auto pos = static_cast<ALsizei>(std::distance(mKeys, iter));
 443     if(pos < mSize && mKeys[pos] == key)
 444         ret = mValues[pos];
 445
 446     return ret;
 447 }