Convert the router to C++

1 files changed, 959 insertions, 0 deletions

diff --git a/router/alc.cpp b/router/alc.cpp
new file mode 100644
index 00000000..36275440
--- /dev/null
+++ b/router/alc.cpp
@@ -0,0 +1,959 @@
+
+#include "config.h"
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "AL/alc.h"
+#include "router.h"
+#include "almalloc.h"
+
+
+#define COUNTOF(x)  (sizeof(x)/sizeof(x[0]))
+
+#define DECL(x) { #x, (ALCvoid*)(x) }
+static const struct {
+    const ALCchar *funcName;
+    ALCvoid *address;
+} alcFunctions[] = {
+    DECL(alcCreateContext),
+    DECL(alcMakeContextCurrent),
+    DECL(alcProcessContext),
+    DECL(alcSuspendContext),
+    DECL(alcDestroyContext),
+    DECL(alcGetCurrentContext),
+    DECL(alcGetContextsDevice),
+    DECL(alcOpenDevice),
+    DECL(alcCloseDevice),
+    DECL(alcGetError),
+    DECL(alcIsExtensionPresent),
+    DECL(alcGetProcAddress),
+    DECL(alcGetEnumValue),
+    DECL(alcGetString),
+    DECL(alcGetIntegerv),
+    DECL(alcCaptureOpenDevice),
+    DECL(alcCaptureCloseDevice),
+    DECL(alcCaptureStart),
+    DECL(alcCaptureStop),
+    DECL(alcCaptureSamples),
+
+    DECL(alcSetThreadContext),
+    DECL(alcGetThreadContext),
+
+    DECL(alEnable),
+    DECL(alDisable),
+    DECL(alIsEnabled),
+    DECL(alGetString),
+    DECL(alGetBooleanv),
+    DECL(alGetIntegerv),
+    DECL(alGetFloatv),
+    DECL(alGetDoublev),
+    DECL(alGetBoolean),
+    DECL(alGetInteger),
+    DECL(alGetFloat),
+    DECL(alGetDouble),
+    DECL(alGetError),
+    DECL(alIsExtensionPresent),
+    DECL(alGetProcAddress),
+    DECL(alGetEnumValue),
+    DECL(alListenerf),
+    DECL(alListener3f),
+    DECL(alListenerfv),
+    DECL(alListeneri),
+    DECL(alListener3i),
+    DECL(alListeneriv),
+    DECL(alGetListenerf),
+    DECL(alGetListener3f),
+    DECL(alGetListenerfv),
+    DECL(alGetListeneri),
+    DECL(alGetListener3i),
+    DECL(alGetListeneriv),
+    DECL(alGenSources),
+    DECL(alDeleteSources),
+    DECL(alIsSource),
+    DECL(alSourcef),
+    DECL(alSource3f),
+    DECL(alSourcefv),
+    DECL(alSourcei),
+    DECL(alSource3i),
+    DECL(alSourceiv),
+    DECL(alGetSourcef),
+    DECL(alGetSource3f),
+    DECL(alGetSourcefv),
+    DECL(alGetSourcei),
+    DECL(alGetSource3i),
+    DECL(alGetSourceiv),
+    DECL(alSourcePlayv),
+    DECL(alSourceStopv),
+    DECL(alSourceRewindv),
+    DECL(alSourcePausev),
+    DECL(alSourcePlay),
+    DECL(alSourceStop),
+    DECL(alSourceRewind),
+    DECL(alSourcePause),
+    DECL(alSourceQueueBuffers),
+    DECL(alSourceUnqueueBuffers),
+    DECL(alGenBuffers),
+    DECL(alDeleteBuffers),
+    DECL(alIsBuffer),
+    DECL(alBufferData),
+    DECL(alBufferf),
+    DECL(alBuffer3f),
+    DECL(alBufferfv),
+    DECL(alBufferi),
+    DECL(alBuffer3i),
+    DECL(alBufferiv),
+    DECL(alGetBufferf),
+    DECL(alGetBuffer3f),
+    DECL(alGetBufferfv),
+    DECL(alGetBufferi),
+    DECL(alGetBuffer3i),
+    DECL(alGetBufferiv),
+    DECL(alDopplerFactor),
+    DECL(alDopplerVelocity),
+    DECL(alSpeedOfSound),
+    DECL(alDistanceModel),
+};
+#undef DECL
+
+#define DECL(x) { #x, (x) }
+static const struct {
+    const ALCchar *enumName;
+    ALCenum value;
+} alcEnumerations[] = {
+    DECL(ALC_INVALID),
+    DECL(ALC_FALSE),
+    DECL(ALC_TRUE),
+
+    DECL(ALC_MAJOR_VERSION),
+    DECL(ALC_MINOR_VERSION),
+    DECL(ALC_ATTRIBUTES_SIZE),
+    DECL(ALC_ALL_ATTRIBUTES),
+    DECL(ALC_DEFAULT_DEVICE_SPECIFIER),
+    DECL(ALC_DEVICE_SPECIFIER),
+    DECL(ALC_ALL_DEVICES_SPECIFIER),
+    DECL(ALC_DEFAULT_ALL_DEVICES_SPECIFIER),
+    DECL(ALC_EXTENSIONS),
+    DECL(ALC_FREQUENCY),
+    DECL(ALC_REFRESH),
+    DECL(ALC_SYNC),
+    DECL(ALC_MONO_SOURCES),
+    DECL(ALC_STEREO_SOURCES),
+    DECL(ALC_CAPTURE_DEVICE_SPECIFIER),
+    DECL(ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER),
+    DECL(ALC_CAPTURE_SAMPLES),
+
+    DECL(ALC_NO_ERROR),
+    DECL(ALC_INVALID_DEVICE),
+    DECL(ALC_INVALID_CONTEXT),
+    DECL(ALC_INVALID_ENUM),
+    DECL(ALC_INVALID_VALUE),
+    DECL(ALC_OUT_OF_MEMORY),
+
+    DECL(AL_INVALID),
+    DECL(AL_NONE),
+    DECL(AL_FALSE),
+    DECL(AL_TRUE),
+
+    DECL(AL_SOURCE_RELATIVE),
+    DECL(AL_CONE_INNER_ANGLE),
+    DECL(AL_CONE_OUTER_ANGLE),
+    DECL(AL_PITCH),
+    DECL(AL_POSITION),
+    DECL(AL_DIRECTION),
+    DECL(AL_VELOCITY),
+    DECL(AL_LOOPING),
+    DECL(AL_BUFFER),
+    DECL(AL_GAIN),
+    DECL(AL_MIN_GAIN),
+    DECL(AL_MAX_GAIN),
+    DECL(AL_ORIENTATION),
+    DECL(AL_REFERENCE_DISTANCE),
+    DECL(AL_ROLLOFF_FACTOR),
+    DECL(AL_CONE_OUTER_GAIN),
+    DECL(AL_MAX_DISTANCE),
+    DECL(AL_SEC_OFFSET),
+    DECL(AL_SAMPLE_OFFSET),
+    DECL(AL_BYTE_OFFSET),
+    DECL(AL_SOURCE_TYPE),
+    DECL(AL_STATIC),
+    DECL(AL_STREAMING),
+    DECL(AL_UNDETERMINED),
+
+    DECL(AL_SOURCE_STATE),
+    DECL(AL_INITIAL),
+    DECL(AL_PLAYING),
+    DECL(AL_PAUSED),
+    DECL(AL_STOPPED),
+
+    DECL(AL_BUFFERS_QUEUED),
+    DECL(AL_BUFFERS_PROCESSED),
+
+    DECL(AL_FORMAT_MONO8),
+    DECL(AL_FORMAT_MONO16),
+    DECL(AL_FORMAT_STEREO8),
+    DECL(AL_FORMAT_STEREO16),
+
+    DECL(AL_FREQUENCY),
+    DECL(AL_BITS),
+    DECL(AL_CHANNELS),
+    DECL(AL_SIZE),
+
+    DECL(AL_UNUSED),
+    DECL(AL_PENDING),
+    DECL(AL_PROCESSED),
+
+    DECL(AL_NO_ERROR),
+    DECL(AL_INVALID_NAME),
+    DECL(AL_INVALID_ENUM),
+    DECL(AL_INVALID_VALUE),
+    DECL(AL_INVALID_OPERATION),
+    DECL(AL_OUT_OF_MEMORY),
+
+    DECL(AL_VENDOR),
+    DECL(AL_VERSION),
+    DECL(AL_RENDERER),
+    DECL(AL_EXTENSIONS),
+
+    DECL(AL_DOPPLER_FACTOR),
+    DECL(AL_DOPPLER_VELOCITY),
+    DECL(AL_DISTANCE_MODEL),
+    DECL(AL_SPEED_OF_SOUND),
+
+    DECL(AL_INVERSE_DISTANCE),
+    DECL(AL_INVERSE_DISTANCE_CLAMPED),
+    DECL(AL_LINEAR_DISTANCE),
+    DECL(AL_LINEAR_DISTANCE_CLAMPED),
+    DECL(AL_EXPONENT_DISTANCE),
+    DECL(AL_EXPONENT_DISTANCE_CLAMPED),
+};
+#undef DECL
+
+static const ALCchar alcNoError[] = "No Error";
+static const ALCchar alcErrInvalidDevice[] = "Invalid Device";
+static const ALCchar alcErrInvalidContext[] = "Invalid Context";
+static const ALCchar alcErrInvalidEnum[] = "Invalid Enum";
+static const ALCchar alcErrInvalidValue[] = "Invalid Value";
+static const ALCchar alcErrOutOfMemory[] = "Out of Memory";
+static const ALCchar alcExtensionList[] =
+    "ALC_ENUMERATE_ALL_EXT ALC_ENUMERATION_EXT ALC_EXT_CAPTURE "
+    "ALC_EXT_thread_local_context";
+
+static const ALCint alcMajorVersion = 1;
+static const ALCint alcMinorVersion = 1;
+
+
+static almtx_t EnumerationLock;
+static almtx_t ContextSwitchLock;
+
+static ATOMIC(ALCenum) LastError = ATOMIC_INIT_STATIC(ALC_NO_ERROR);
+static PtrIntMap DeviceIfaceMap = PTRINTMAP_STATIC_INITIALIZE;
+static PtrIntMap ContextIfaceMap = PTRINTMAP_STATIC_INITIALIZE;
+
+
+typedef struct EnumeratedList {
+    ALCchar *Names;
+    ALCchar *NamesEnd;
+    ALCint *Indicies;
+    ALCsizei IndexSize;
+} EnumeratedList;
+static EnumeratedList DevicesList = { nullptr, nullptr, nullptr, 0 };
+static EnumeratedList AllDevicesList = { nullptr, nullptr, nullptr, 0 };
+static EnumeratedList CaptureDevicesList = { nullptr, nullptr, nullptr, 0 };
+
+static void ClearDeviceList(EnumeratedList *list)
+{
+    al_free(list->Names);
+    list->Names = nullptr;
+    list->NamesEnd = nullptr;
+
+    al_free(list->Indicies);
+    list->Indicies = nullptr;
+    list->IndexSize = 0;
+}
+
+static void AppendDeviceList(EnumeratedList *list, const ALCchar *names, ALint idx)
+{
+    const ALCchar *name_end = names;
+    ALCsizei count = 0;
+    ALCchar *new_list;
+    ALCint *new_indicies;
+    size_t len;
+    ALCsizei i;
+
+    if(!name_end)
+        return;
+    while(*name_end)
+    {
+        TRACE("Enumerated \"%s\", driver %d\n", name_end, idx);
+        count++;
+        name_end += strlen(name_end)+1;
+    }
+    if(names == name_end)
+        return;
+
+    len = (list->NamesEnd - list->Names) + (name_end - names);
+    new_list = reinterpret_cast<ALCchar*>(al_calloc(DEF_ALIGN, len + 1));
+    memcpy(new_list,  list->Names, list->NamesEnd - list->Names);
+    memcpy(new_list + (list->NamesEnd - list->Names), names, name_end - names);
+    al_free(list->Names);
+    list->Names = new_list;
+    list->NamesEnd = list->Names + len;
+
+    new_indicies = reinterpret_cast<ALCint*>(
+        al_calloc(16, sizeof(ALCint)*(list->IndexSize + count)));
+    for(i = 0;i < list->IndexSize;i++)
+        new_indicies[i] = list->Indicies[i];
+    for(i = 0;i < count;i++)
+        new_indicies[list->IndexSize+i] = idx;
+    al_free(list->Indicies);
+    list->Indicies = new_indicies;
+    list->IndexSize += count;
+}
+
+static ALint GetDriverIndexForName(const EnumeratedList *list, const ALCchar *name)
+{
+    const ALCchar *devnames = list->Names;
+    const ALCint *index = list->Indicies;
+
+    while(devnames && *devnames)
+    {
+        if(strcmp(name, devnames) == 0)
+            return *index;
+        devnames += strlen(devnames)+1;
+        index++;
+    }
+    return -1;
+}
+
+void InitALC(void)
+{
+    almtx_init(&EnumerationLock, almtx_recursive);
+    almtx_init(&ContextSwitchLock, almtx_plain);
+}
+
+void ReleaseALC(void)
+{
+    ClearDeviceList(&DevicesList);
+    ClearDeviceList(&AllDevicesList);
+    ClearDeviceList(&CaptureDevicesList);
+
+    ResetPtrIntMap(&ContextIfaceMap);
+    ResetPtrIntMap(&DeviceIfaceMap);
+
+    almtx_destroy(&ContextSwitchLock);
+    almtx_destroy(&EnumerationLock);
+}
+
+
+ALC_API ALCdevice* ALC_APIENTRY alcOpenDevice(const ALCchar *devicename)
+{
+    ALCdevice *device = nullptr;
+    ALint idx;
+
+    /* Prior to the enumeration extension, apps would hardcode these names as a
+     * quality hint for the wrapper driver. Ignore them since there's no sane
+     * way to map them.
+     */
+    if(devicename && (devicename[0] == '\0' ||
+                      strcmp(devicename, "DirectSound3D") == 0 ||
+                      strcmp(devicename, "DirectSound") == 0 ||
+                      strcmp(devicename, "MMSYSTEM") == 0))
+        devicename = nullptr;
+    if(devicename)
+    {
+        almtx_lock(&EnumerationLock);
+        if(!DevicesList.Names)
+            (void)alcGetString(nullptr, ALC_DEVICE_SPECIFIER);
+        idx = GetDriverIndexForName(&DevicesList, devicename);
+        if(idx < 0)
+        {
+            if(!AllDevicesList.Names)
+                (void)alcGetString(nullptr, ALC_ALL_DEVICES_SPECIFIER);
+            idx = GetDriverIndexForName(&AllDevicesList, devicename);
+        }
+        almtx_unlock(&EnumerationLock);
+        if(idx < 0)
+        {
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_VALUE);
+            TRACE("Failed to find driver for name \"%s\"\n", devicename);
+            return nullptr;
+        }
+        TRACE("Found driver %d for name \"%s\"\n", idx, devicename);
+        device = DriverList[idx].alcOpenDevice(devicename);
+    }
+    else
+    {
+        int i;
+        for(i = 0;i < DriverListSize;i++)
+        {
+            if(DriverList[i].ALCVer >= MAKE_ALC_VER(1, 1) ||
+               DriverList[i].alcIsExtensionPresent(nullptr, "ALC_ENUMERATION_EXT"))
+            {
+                idx = i;
+                TRACE("Using default device from driver %d\n", idx);
+                device = DriverList[idx].alcOpenDevice(nullptr);
+                break;
+            }
+        }
+    }
+
+    if(device)
+    {
+        if(InsertPtrIntMapEntry(&DeviceIfaceMap, device, idx) != ALC_NO_ERROR)
+        {
+            DriverList[idx].alcCloseDevice(device);
+            device = nullptr;
+        }
+    }
+
+    return device;
+}
+
+ALC_API ALCboolean ALC_APIENTRY alcCloseDevice(ALCdevice *device)
+{
+    ALint idx;
+
+    if(!device || (idx=LookupPtrIntMapKey(&DeviceIfaceMap, device)) < 0)
+    {
+        ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+        return ALC_FALSE;
+    }
+    if(!DriverList[idx].alcCloseDevice(device))
+        return ALC_FALSE;
+    RemovePtrIntMapKey(&DeviceIfaceMap, device);
+    return ALC_TRUE;
+}
+
+
+ALC_API ALCcontext* ALC_APIENTRY alcCreateContext(ALCdevice *device, const ALCint *attrlist)
+{
+    ALCcontext *context;
+    ALint idx;
+
+    if(!device || (idx=LookupPtrIntMapKey(&DeviceIfaceMap, device)) < 0)
+    {
+        ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+        return ALC_FALSE;
+    }
+    context = DriverList[idx].alcCreateContext(device, attrlist);
+    if(context)
+    {
+        if(InsertPtrIntMapEntry(&ContextIfaceMap, context, idx) != ALC_NO_ERROR)
+        {
+            DriverList[idx].alcDestroyContext(context);
+            context = nullptr;
+        }
+    }
+
+    return context;
+}
+
+ALC_API ALCboolean ALC_APIENTRY alcMakeContextCurrent(ALCcontext *context)
+{
+    ALint idx = -1;
+
+    almtx_lock(&ContextSwitchLock);
+    if(context)
+    {
+        idx = LookupPtrIntMapKey(&ContextIfaceMap, context);
+        if(idx < 0)
+        {
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_CONTEXT);
+            almtx_unlock(&ContextSwitchLock);
+            return ALC_FALSE;
+        }
+        if(!DriverList[idx].alcMakeContextCurrent(context))
+        {
+            almtx_unlock(&ContextSwitchLock);
+            return ALC_FALSE;
+        }
+    }
+
+    /* Unset the context from the old driver if it's different from the new
+     * current one.
+     */
+    if(idx < 0)
+    {
+        DriverIface *oldiface = reinterpret_cast<DriverIface*>(altss_get(ThreadCtxDriver));
+        if(oldiface) oldiface->alcSetThreadContext(nullptr);
+        oldiface = reinterpret_cast<DriverIface*>(
+            ATOMIC_EXCHANGE_PTR_SEQ(&CurrentCtxDriver, (DriverIface*){nullptr}));
+        if(oldiface) oldiface->alcMakeContextCurrent(nullptr);
+    }
+    else
+    {
+        DriverIface *oldiface = reinterpret_cast<DriverIface*>(altss_get(ThreadCtxDriver));
+        if(oldiface && oldiface != &DriverList[idx])
+            oldiface->alcSetThreadContext(nullptr);
+        oldiface = reinterpret_cast<DriverIface*>(
+            ATOMIC_EXCHANGE_PTR_SEQ(&CurrentCtxDriver, &DriverList[idx]));
+        if(oldiface && oldiface != &DriverList[idx])
+            oldiface->alcMakeContextCurrent(nullptr);
+    }
+    almtx_unlock(&ContextSwitchLock);
+    altss_set(ThreadCtxDriver, nullptr);
+
+    return ALC_TRUE;
+}
+
+ALC_API void ALC_APIENTRY alcProcessContext(ALCcontext *context)
+{
+    if(context)
+    {
+        ALint idx = LookupPtrIntMapKey(&ContextIfaceMap, context);
+        if(idx >= 0)
+            return DriverList[idx].alcProcessContext(context);
+    }
+    ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_CONTEXT);
+}
+
+ALC_API void ALC_APIENTRY alcSuspendContext(ALCcontext *context)
+{
+    if(context)
+    {
+        ALint idx = LookupPtrIntMapKey(&ContextIfaceMap, context);
+        if(idx >= 0)
+            return DriverList[idx].alcSuspendContext(context);
+    }
+    ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_CONTEXT);
+}
+
+ALC_API void ALC_APIENTRY alcDestroyContext(ALCcontext *context)
+{
+    ALint idx;
+
+    if(!context || (idx=LookupPtrIntMapKey(&ContextIfaceMap, context)) < 0)
+    {
+        ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_CONTEXT);
+        return;
+    }
+
+    DriverList[idx].alcDestroyContext(context);
+    RemovePtrIntMapKey(&ContextIfaceMap, context);
+}
+
+ALC_API ALCcontext* ALC_APIENTRY alcGetCurrentContext(void)
+{
+    DriverIface *iface = reinterpret_cast<DriverIface*>(altss_get(ThreadCtxDriver));
+    if(!iface) iface = ATOMIC_LOAD_SEQ(&CurrentCtxDriver);
+    return iface ? iface->alcGetCurrentContext() : nullptr;
+}
+
+ALC_API ALCdevice* ALC_APIENTRY alcGetContextsDevice(ALCcontext *context)
+{
+    if(context)
+    {
+        ALint idx = LookupPtrIntMapKey(&ContextIfaceMap, context);
+        if(idx >= 0)
+            return DriverList[idx].alcGetContextsDevice(context);
+    }
+    ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_CONTEXT);
+    return nullptr;
+}
+
+
+ALC_API ALCenum ALC_APIENTRY alcGetError(ALCdevice *device)
+{
+    if(device)
+    {
+        ALint idx = LookupPtrIntMapKey(&DeviceIfaceMap, device);
+        if(idx < 0) return ALC_INVALID_DEVICE;
+        return DriverList[idx].alcGetError(device);
+    }
+    return ATOMIC_EXCHANGE_SEQ(&LastError, ALC_NO_ERROR);
+}
+
+ALC_API ALCboolean ALC_APIENTRY alcIsExtensionPresent(ALCdevice *device, const ALCchar *extname)
+{
+    const char *ptr;
+    size_t len;
+
+    if(device)
+    {
+        ALint idx = LookupPtrIntMapKey(&DeviceIfaceMap, device);
+        if(idx < 0)
+        {
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+            return ALC_FALSE;
+        }
+        return DriverList[idx].alcIsExtensionPresent(device, extname);
+    }
+
+    len = strlen(extname);
+    ptr = alcExtensionList;
+    while(ptr && *ptr)
+    {
+        if(strncasecmp(ptr, extname, len) == 0 && (ptr[len] == '\0' || isspace(ptr[len])))
+            return ALC_TRUE;
+        if((ptr=strchr(ptr, ' ')) != nullptr)
+        {
+            do {
+                ++ptr;
+            } while(isspace(*ptr));
+        }
+    }
+    return ALC_FALSE;
+}
+
+ALC_API void* ALC_APIENTRY alcGetProcAddress(ALCdevice *device, const ALCchar *funcname)
+{
+    size_t i;
+
+    if(device)
+    {
+        ALint idx = LookupPtrIntMapKey(&DeviceIfaceMap, device);
+        if(idx < 0)
+        {
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+            return nullptr;
+        }
+        return DriverList[idx].alcGetProcAddress(device, funcname);
+    }
+
+    for(i = 0;i < COUNTOF(alcFunctions);i++)
+    {
+        if(strcmp(funcname, alcFunctions[i].funcName) == 0)
+            return alcFunctions[i].address;
+    }
+    return nullptr;
+}
+
+ALC_API ALCenum ALC_APIENTRY alcGetEnumValue(ALCdevice *device, const ALCchar *enumname)
+{
+    size_t i;
+
+    if(device)
+    {
+        ALint idx = LookupPtrIntMapKey(&DeviceIfaceMap, device);
+        if(idx < 0)
+        {
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+            return 0;
+        }
+        return DriverList[idx].alcGetEnumValue(device, enumname);
+    }
+
+    for(i = 0;i < COUNTOF(alcEnumerations);i++)
+    {
+        if(strcmp(enumname, alcEnumerations[i].enumName) == 0)
+            return alcEnumerations[i].value;
+    }
+    return 0;
+}
+
+ALC_API const ALCchar* ALC_APIENTRY alcGetString(ALCdevice *device, ALCenum param)
+{
+    ALsizei i = 0;
+
+    if(device)
+    {
+        ALint idx = LookupPtrIntMapKey(&DeviceIfaceMap, device);
+        if(idx < 0)
+        {
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+            return nullptr;
+        }
+        return DriverList[idx].alcGetString(device, param);
+    }
+
+    switch(param)
+    {
+    case ALC_NO_ERROR:
+        return alcNoError;
+    case ALC_INVALID_ENUM:
+        return alcErrInvalidEnum;
+    case ALC_INVALID_VALUE:
+        return alcErrInvalidValue;
+    case ALC_INVALID_DEVICE:
+        return alcErrInvalidDevice;
+    case ALC_INVALID_CONTEXT:
+        return alcErrInvalidContext;
+    case ALC_OUT_OF_MEMORY:
+        return alcErrOutOfMemory;
+    case ALC_EXTENSIONS:
+        return alcExtensionList;
+
+    case ALC_DEVICE_SPECIFIER:
+        almtx_lock(&EnumerationLock);
+        ClearDeviceList(&DevicesList);
+        for(i = 0;i < DriverListSize;i++)
+        {
+            /* Only enumerate names from drivers that support it. */
+            if(DriverList[i].ALCVer >= MAKE_ALC_VER(1, 1) ||
+               DriverList[i].alcIsExtensionPresent(nullptr, "ALC_ENUMERATION_EXT"))
+                AppendDeviceList(&DevicesList,
+                    DriverList[i].alcGetString(nullptr, ALC_DEVICE_SPECIFIER), i
+                );
+        }
+        almtx_unlock(&EnumerationLock);
+        return DevicesList.Names;
+
+    case ALC_ALL_DEVICES_SPECIFIER:
+        almtx_lock(&EnumerationLock);
+        ClearDeviceList(&AllDevicesList);
+        for(i = 0;i < DriverListSize;i++)
+        {
+            /* If the driver doesn't support ALC_ENUMERATE_ALL_EXT, substitute
+             * standard enumeration.
+             */
+            if(DriverList[i].alcIsExtensionPresent(nullptr, "ALC_ENUMERATE_ALL_EXT"))
+                AppendDeviceList(&AllDevicesList,
+                    DriverList[i].alcGetString(nullptr, ALC_ALL_DEVICES_SPECIFIER), i
+                );
+            else if(DriverList[i].ALCVer >= MAKE_ALC_VER(1, 1) ||
+                    DriverList[i].alcIsExtensionPresent(nullptr, "ALC_ENUMERATION_EXT"))
+                AppendDeviceList(&AllDevicesList,
+                    DriverList[i].alcGetString(nullptr, ALC_DEVICE_SPECIFIER), i
+                );
+        }
+        almtx_unlock(&EnumerationLock);
+        return AllDevicesList.Names;
+
+    case ALC_CAPTURE_DEVICE_SPECIFIER:
+        almtx_lock(&EnumerationLock);
+        ClearDeviceList(&CaptureDevicesList);
+        for(i = 0;i < DriverListSize;i++)
+        {
+            if(DriverList[i].ALCVer >= MAKE_ALC_VER(1, 1) ||
+               DriverList[i].alcIsExtensionPresent(nullptr, "ALC_EXT_CAPTURE"))
+                AppendDeviceList(&CaptureDevicesList,
+                    DriverList[i].alcGetString(nullptr, ALC_CAPTURE_DEVICE_SPECIFIER), i
+                );
+        }
+        almtx_unlock(&EnumerationLock);
+        return CaptureDevicesList.Names;
+
+    case ALC_DEFAULT_DEVICE_SPECIFIER:
+        for(i = 0;i < DriverListSize;i++)
+        {
+            if(DriverList[i].ALCVer >= MAKE_ALC_VER(1, 1) ||
+               DriverList[i].alcIsExtensionPresent(nullptr, "ALC_ENUMERATION_EXT"))
+                return DriverList[i].alcGetString(nullptr, ALC_DEFAULT_DEVICE_SPECIFIER);
+        }
+        return "";
+
+    case ALC_DEFAULT_ALL_DEVICES_SPECIFIER:
+        for(i = 0;i < DriverListSize;i++)
+        {
+            if(DriverList[i].alcIsExtensionPresent(nullptr, "ALC_ENUMERATE_ALL_EXT"))
+                return DriverList[i].alcGetString(nullptr, ALC_DEFAULT_ALL_DEVICES_SPECIFIER);
+        }
+        return "";
+
+    case ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER:
+        for(i = 0;i < DriverListSize;i++)
+        {
+            if(DriverList[i].ALCVer >= MAKE_ALC_VER(1, 1) ||
+               DriverList[i].alcIsExtensionPresent(nullptr, "ALC_EXT_CAPTURE"))
+                return DriverList[i].alcGetString(nullptr, ALC_CAPTURE_DEFAULT_DEVICE_SPECIFIER);
+        }
+        return "";
+
+    default:
+        ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_ENUM);
+        break;
+    }
+    return nullptr;
+}
+
+ALC_API void ALC_APIENTRY alcGetIntegerv(ALCdevice *device, ALCenum param, ALCsizei size, ALCint *values)
+{
+    if(device)
+    {
+        ALint idx = LookupPtrIntMapKey(&DeviceIfaceMap, device);
+        if(idx < 0)
+        {
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+            return;
+        }
+        return DriverList[idx].alcGetIntegerv(device, param, size, values);
+    }
+
+    if(size <= 0 || values == nullptr)
+    {
+        ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_VALUE);
+        return;
+    }
+
+    switch(param)
+    {
+        case ALC_MAJOR_VERSION:
+            if(size >= 1)
+            {
+                values[0] = alcMajorVersion;
+                return;
+            }
+            /*fall-through*/
+        case ALC_MINOR_VERSION:
+            if(size >= 1)
+            {
+                values[0] = alcMinorVersion;
+                return;
+            }
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_VALUE);
+            return;
+
+        case ALC_ATTRIBUTES_SIZE:
+        case ALC_ALL_ATTRIBUTES:
+        case ALC_FREQUENCY:
+        case ALC_REFRESH:
+        case ALC_SYNC:
+        case ALC_MONO_SOURCES:
+        case ALC_STEREO_SOURCES:
+        case ALC_CAPTURE_SAMPLES:
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+            return;
+
+        default:
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_ENUM);
+            return;
+    }
+}
+
+
+ALC_API ALCdevice* ALC_APIENTRY alcCaptureOpenDevice(const ALCchar *devicename, ALCuint frequency, ALCenum format, ALCsizei buffersize)
+{
+    ALCdevice *device = nullptr;
+    ALint idx;
+
+    if(devicename && devicename[0] == '\0')
+        devicename = nullptr;
+    if(devicename)
+    {
+        almtx_lock(&EnumerationLock);
+        if(!CaptureDevicesList.Names)
+            (void)alcGetString(nullptr, ALC_CAPTURE_DEVICE_SPECIFIER);
+        idx = GetDriverIndexForName(&CaptureDevicesList, devicename);
+        almtx_unlock(&EnumerationLock);
+        if(idx < 0)
+        {
+            ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_VALUE);
+            TRACE("Failed to find driver for name \"%s\"\n", devicename);
+            return nullptr;
+        }
+        TRACE("Found driver %d for name \"%s\"\n", idx, devicename);
+        device = DriverList[idx].alcCaptureOpenDevice(
+            devicename, frequency, format, buffersize
+        );
+    }
+    else
+    {
+        int i;
+        for(i = 0;i < DriverListSize;i++)
+        {
+            if(DriverList[i].ALCVer >= MAKE_ALC_VER(1, 1) ||
+               DriverList[i].alcIsExtensionPresent(nullptr, "ALC_EXT_CAPTURE"))
+            {
+                idx = i;
+                TRACE("Using default capture device from driver %d\n", idx);
+                device = DriverList[idx].alcCaptureOpenDevice(
+                    nullptr, frequency, format, buffersize
+                );
+                break;
+            }
+        }
+    }
+
+    if(device)
+    {
+        if(InsertPtrIntMapEntry(&DeviceIfaceMap, device, idx) != ALC_NO_ERROR)
+        {
+            DriverList[idx].alcCaptureCloseDevice(device);
+            device = nullptr;
+        }
+    }
+
+    return device;
+}
+
+ALC_API ALCboolean ALC_APIENTRY alcCaptureCloseDevice(ALCdevice *device)
+{
+    ALint idx;
+
+    if(!device || (idx=LookupPtrIntMapKey(&DeviceIfaceMap, device)) < 0)
+    {
+        ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+        return ALC_FALSE;
+    }
+    if(!DriverList[idx].alcCaptureCloseDevice(device))
+        return ALC_FALSE;
+    RemovePtrIntMapKey(&DeviceIfaceMap, device);
+    return ALC_TRUE;
+}
+
+ALC_API void ALC_APIENTRY alcCaptureStart(ALCdevice *device)
+{
+    if(device)
+    {
+        ALint idx = LookupPtrIntMapKey(&DeviceIfaceMap, device);
+        if(idx >= 0)
+            return DriverList[idx].alcCaptureStart(device);
+    }
+    ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+}
+
+ALC_API void ALC_APIENTRY alcCaptureStop(ALCdevice *device)
+{
+    if(device)
+    {
+        ALint idx = LookupPtrIntMapKey(&DeviceIfaceMap, device);
+        if(idx >= 0)
+            return DriverList[idx].alcCaptureStop(device);
+    }
+    ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+}
+
+ALC_API void ALC_APIENTRY alcCaptureSamples(ALCdevice *device, ALCvoid *buffer, ALCsizei samples)
+{
+    if(device)
+    {
+        ALint idx = LookupPtrIntMapKey(&DeviceIfaceMap, device);
+        if(idx >= 0)
+            return DriverList[idx].alcCaptureSamples(device, buffer, samples);
+    }
+    ATOMIC_STORE_SEQ(&LastError, ALC_INVALID_DEVICE);
+}
+
+
+ALC_API ALCboolean ALC_APIENTRY alcSetThreadContext(ALCcontext *context)
+{
+    ALCenum err = ALC_INVALID_CONTEXT;
+    ALint idx;
+
+    if(!context)
+    {
+        DriverIface *oldiface = reinterpret_cast<DriverIface*>(altss_get(ThreadCtxDriver));
+        if(oldiface && !oldiface->alcSetThreadContext(nullptr))
+            return ALC_FALSE;
+        altss_set(ThreadCtxDriver, nullptr);
+        return ALC_TRUE;
+    }
+
+    idx = LookupPtrIntMapKey(&ContextIfaceMap, context);
+    if(idx >= 0)
+    {
+        if(DriverList[idx].alcSetThreadContext(context))
+        {
+            DriverIface *oldiface = reinterpret_cast<DriverIface*>(altss_get(ThreadCtxDriver));
+            if(oldiface != &DriverList[idx])
+            {
+                altss_set(ThreadCtxDriver, &DriverList[idx]);
+                if(oldiface) oldiface->alcSetThreadContext(nullptr);
+            }
+            return ALC_TRUE;
+        }
+        err = DriverList[idx].alcGetError(nullptr);
+    }
+    ATOMIC_STORE_SEQ(&LastError, err);
+    return ALC_FALSE;
+}
+
+ALC_API ALCcontext* ALC_APIENTRY alcGetThreadContext(void)
+{
+    DriverIface *iface = reinterpret_cast<DriverIface*>(altss_get(ThreadCtxDriver));
+    if(iface) return iface->alcGetThreadContext();
+    return nullptr;
+}