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a3696c0b91
lib/sysdep: clean up by moving OS and cpu-arch folders into "os" and "arch" folders This was SVN commit r6162.
128 lines
4.3 KiB
C++
128 lines
4.3 KiB
C++
/**
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* =========================================================================
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* File : wsdl.cpp
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* Project : 0 A.D.
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* Description : sound card detection on Windows.
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* =========================================================================
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*/
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// license: GPL; see lib/license.txt
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#include "precompiled.h"
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#include "lib/sysdep/snd.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string>
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#include <set>
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#include "lib/path_util.h"
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#include "wdll_ver.h"
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#include "win.h"
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#include "wutil.h"
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#include "wmi.h"
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static LibError IsOpenAlDllName(const std::string& name)
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{
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// (matches "*oal.dll" and "*OpenAL*", as with OpenAL router's search)
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return name.find("oal.dll") != std::string::npos || name.find("OpenAL") != std::string::npos;
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}
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// ensures each OpenAL DLL is only listed once (even if present in several
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// directories on our search path).
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typedef std::set<std::string> StringSet;
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// find all OpenAL DLLs in a dir.
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// call in library search order (exe dir, then win sys dir); otherwise,
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// DLLs in the executable's starting directory hide those of the
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// same name in the system directory.
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static void add_oal_dlls_in_dir(const OsPath& path, StringSet& dlls)
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{
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for(OsDirectoryIterator it(path); it != OsDirectoryIterator(); ++it)
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{
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if(!fs::is_regular(it->status()))
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continue;
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const OsPath& pathname = it->path();
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const std::string& name = pathname.leaf();
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if(!IsOpenAlDllName(name))
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continue;
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// already in StringSet (i.e. has already been wdll_ver_list_add-ed)
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std::pair<StringSet::iterator, bool> ret = dlls.insert(name);
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if(!ret.second) // insert failed - element already there
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continue;
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(void)wdll_ver_list_add(pathname);
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}
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}
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//-----------------------------------------------------------------------------
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// DirectSound driver version
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// we've seen audio problems caused by buggy DirectSound drivers (because
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// OpenAL can use them in its implementation), so their version should be
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// retrieved as well. the only way I know of is to enumerate all DS devices.
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//
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// unfortunately this fails with Vista's DS emulation - it returns some
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// GUID crap as the module name. to avoidc crashing when attempting to get
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// the version info for that bogus driver path, we'll skip this code there.
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// (delay-loading dsound.dll eliminates any overhead)
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static char directSoundDriverPath[MAX_PATH+1];
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// store sound card name and path to DirectSound driver.
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// called for each DirectSound driver, but aborts after first valid driver.
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static BOOL CALLBACK DirectSoundCallback(void* guid, const char* UNUSED(description),
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const char* module, void* UNUSED(cbData))
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{
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// skip first dummy entry (description == "Primary Sound Driver")
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if(guid == NULL)
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return TRUE; // continue calling
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// note: $system\\drivers is not in LoadLibrary's search list,
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// so we have to give the full pathname.
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snprintf(directSoundDriverPath, ARRAY_SIZE(directSoundDriverPath), "%s\\drivers\\%s", win_sys_dir, module);
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// we assume the first "driver name" (sound card) is the one we want;
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// stick with that and stop calling.
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return FALSE;
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}
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static const char* GetDirectSoundDriverPath()
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{
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#define DS_OK 0
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typedef BOOL (CALLBACK* LPDSENUMCALLBACKA)(void*, const char*, const char*, void*);
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typedef HRESULT (WINAPI *PDirectSoundEnumerateA)(LPDSENUMCALLBACKA, void*);
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HMODULE hDsoundDll = LoadLibrary("dsound.dll");
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PDirectSoundEnumerateA pDirectSoundEnumerateA = (PDirectSoundEnumerateA)GetProcAddress(hDsoundDll, "DirectSoundEnumerateA");
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if(pDirectSoundEnumerateA)
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{
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HRESULT ret = pDirectSoundEnumerateA(DirectSoundCallback, (void*)0);
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debug_assert(ret == DS_OK);
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}
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FreeLibrary(hDsoundDll);
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return directSoundDriverPath;
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}
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//-----------------------------------------------------------------------------
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LibError win_get_snd_info()
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{
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WmiMap wmiMap;
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if(wmi_GetClass("Win32_SoundDevice", wmiMap) == INFO::OK)
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sprintf_s(snd_card, SND_CARD_LEN, "%ls", wmiMap[L"ProductName"].bstrVal);
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// find all DLLs related to OpenAL, retrieve their versions,
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// and store in snd_drv_ver string.
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wdll_ver_list_init(snd_drv_ver, SND_DRV_VER_LEN);
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if(wutil_WindowsVersion() < WUTIL_VERSION_VISTA)
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(void)wdll_ver_list_add(GetDirectSoundDriverPath());
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StringSet dlls; // ensures uniqueness
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(void)add_oal_dlls_in_dir(win_exe_dir, dlls);
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(void)add_oal_dlls_in_dir(win_sys_dir, dlls);
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return INFO::OK;
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}
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