forked from 0ad/0ad
173 lines
5.4 KiB
C++
173 lines
5.4 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 "lib/res/file/file.h"
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#include "dll_ver.h" // dll_list_*
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#include "win_internal.h"
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#include "wutil.h"
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// DirectSound header
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// HACK: workaround for "subwtype.h not found" errors on VC6/7 hybrid.
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// (subwtype.h <- d3dtypes.h <- dsound.h)
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// since we're only using one DS function (DirectSoundEnumerate),
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// we forward-declare it rather than fix/mess with the system headers.
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#if 0
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// mmsystem.h is necessary for dsound.h; we cut out unnecessary junk
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# define MMNODRV // Installable driver support
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# define MMNOSOUND // Sound support
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//# define MMNOWAVE // Waveform support
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# define MMNOMIDI // MIDI support
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# define MMNOAUX // Auxiliary audio support
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# define MMNOMIXER // Mixer support
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# define MMNOTIMER // Timer support
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# define MMNOJOY // Joystick support
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# define MMNOMCI // MCI support
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# define MMNOMMIO // Multimedia file I/O support
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# define MMNOMMSYSTEM // General MMSYSTEM functions
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# include <MMSystem.h>
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# define DIRECTSOUND_VERSION 0x0500
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# include <dsound.h>
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#else
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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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EXTERN_C __declspec(dllimport) HRESULT WINAPI DirectSoundEnumerateA(LPDSENUMCALLBACKA, void*);
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#endif
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#if MSC_VERSION
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#pragma comment(lib, "dsound.lib")
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#endif
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// note: OpenAL alGetString is worthless: it only returns OpenAL API version
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// and renderer (e.g. "Software").
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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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// if this directory entry is an OpenAL DLL, add it to our list.
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// (matches "*oal.dll" and "*OpenAL*", as with OpenAL router's search)
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// called by add_oal_dlls_in_dir.
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//
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// note: we need the full DLL path for dll_list_add but DirEnt only gives us
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// the name. for efficiency, we append this in a PathPackage allocated by
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// add_oal_dlls_in_dir.
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static LibError add_if_oal_dll(const DirEnt* ent, PathPackage* pp, StringSet* dlls)
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{
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const char* fn = ent->name;
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// skip non-files.
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if(!DIRENT_IS_DIR(ent))
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return INFO::OK;
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// skip if not an OpenAL DLL.
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const size_t len = strlen(fn);
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const bool oal = len >= 7 && !strcasecmp(fn+len-7, "oal.dll");
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const bool openal = strstr(fn, "OpenAL") != 0;
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if(!oal && !openal)
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return INFO::OK;
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// skip if already in StringSet (i.e. has already been dll_list_add-ed)
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std::pair<StringSet::iterator, bool> ret = dlls->insert(fn);
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if(!ret.second) // insert failed - element already there
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return INFO::OK;
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RETURN_ERR(path_package_append_file(pp, fn));
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return dll_list_add(pp->path);
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}
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// find all OpenAL DLLs in a dir (via file_enum and add_if_oal_dll).
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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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//
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// <dir>: no trailing.
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static LibError add_oal_dlls_in_dir(const char* dir, StringSet* dlls)
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{
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PathPackage pp;
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RETURN_ERR(path_package_set_dir(&pp, dir));
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DirIterator d;
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RETURN_ERR(dir_open(dir, &d));
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DirEnt ent;
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for(;;) // instead of while to avoid warning
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{
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LibError err = dir_next_ent(&d, &ent);
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if(err != INFO::OK)
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break;
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(void)add_if_oal_dll(&ent, &pp, dlls);
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}
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(void)dir_close(&d);
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return INFO::OK;
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}
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// DS3D driver path; filled by ds_enum, used by win_get_snd_info.
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// side effect: remains zeroed if there's no sound card installed.
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static char ds_drv_path[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 ds_enum(void* UNUSED(guid), const char* description,
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const char* module, void* UNUSED(ctx))
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{
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// skip first (dummy) entry, where description == "Primary Sound Driver".
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if(module[0] == '\0')
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return TRUE; // continue calling
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strcpy_s(snd_card, SND_CARD_LEN, description);
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snprintf(ds_drv_path, ARRAY_SIZE(ds_drv_path), "%s\\drivers\\%s", win_sys_dir, module);
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// note: this directory is not in LoadLibrary's search list,
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// so we have to give the full pathname.
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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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LibError win_get_snd_info()
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{
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// get sound card name and DS driver path.
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if(DirectSoundEnumerateA((LPDSENUMCALLBACKA)ds_enum, (void*)0) != DS_OK)
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debug_warn("DirectSoundEnumerate failed");
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// there are apparently no sound card/drivers installed; so indicate.
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// (the code below would fail and not produce reasonable output)
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if(ds_drv_path[0] == '\0')
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{
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strcpy_s(snd_card, SND_CARD_LEN, "(none)");
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strcpy_s(snd_drv_ver, SND_DRV_VER_LEN, "(none)");
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return INFO::OK;
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}
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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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dll_list_init(snd_drv_ver, SND_DRV_VER_LEN);
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(void)dll_list_add(ds_drv_path);
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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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