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