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|
/**
* OpenAL cross platform audio library
* Copyright (C) 2011 by authors.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
* Or go to http://www.gnu.org/copyleft/lgpl.html
*/
#include "config.h"
#define COBJMACROS
#include <stdlib.h>
#include <stdio.h>
#include <memory.h>
#include <wtypes.h>
#include <mmdeviceapi.h>
#include <audioclient.h>
#include <cguid.h>
#include <devpropdef.h>
#include <mmreg.h>
#include <propsys.h>
#include <propkey.h>
#include <devpkey.h>
#ifndef _WAVEFORMATEXTENSIBLE_
#include <ks.h>
#include <ksmedia.h>
#endif
#include "alMain.h"
#include "alu.h"
#include "ringbuffer.h"
#include "threads.h"
#include "compat.h"
#include "alstring.h"
#include "converter.h"
#include "backends/base.h"
DEFINE_GUID(KSDATAFORMAT_SUBTYPE_PCM, 0x00000001, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
DEFINE_GUID(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, 0x00000003, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
DEFINE_DEVPROPKEY(DEVPKEY_Device_FriendlyName, 0xa45c254e, 0xdf1c, 0x4efd, 0x80,0x20, 0x67,0xd1,0x46,0xa8,0x50,0xe0, 14);
DEFINE_PROPERTYKEY(PKEY_AudioEndpoint_FormFactor, 0x1da5d803, 0xd492, 0x4edd, 0x8c,0x23, 0xe0,0xc0,0xff,0xee,0x7f,0x0e, 0);
DEFINE_PROPERTYKEY(PKEY_AudioEndpoint_GUID, 0x1da5d803, 0xd492, 0x4edd, 0x8c, 0x23,0xe0, 0xc0,0xff,0xee,0x7f,0x0e, 4 );
#define MONO SPEAKER_FRONT_CENTER
#define STEREO (SPEAKER_FRONT_LEFT|SPEAKER_FRONT_RIGHT)
#define QUAD (SPEAKER_FRONT_LEFT|SPEAKER_FRONT_RIGHT|SPEAKER_BACK_LEFT|SPEAKER_BACK_RIGHT)
#define X5DOT1 (SPEAKER_FRONT_LEFT|SPEAKER_FRONT_RIGHT|SPEAKER_FRONT_CENTER|SPEAKER_LOW_FREQUENCY|SPEAKER_SIDE_LEFT|SPEAKER_SIDE_RIGHT)
#define X5DOT1REAR (SPEAKER_FRONT_LEFT|SPEAKER_FRONT_RIGHT|SPEAKER_FRONT_CENTER|SPEAKER_LOW_FREQUENCY|SPEAKER_BACK_LEFT|SPEAKER_BACK_RIGHT)
#define X6DOT1 (SPEAKER_FRONT_LEFT|SPEAKER_FRONT_RIGHT|SPEAKER_FRONT_CENTER|SPEAKER_LOW_FREQUENCY|SPEAKER_BACK_CENTER|SPEAKER_SIDE_LEFT|SPEAKER_SIDE_RIGHT)
#define X7DOT1 (SPEAKER_FRONT_LEFT|SPEAKER_FRONT_RIGHT|SPEAKER_FRONT_CENTER|SPEAKER_LOW_FREQUENCY|SPEAKER_BACK_LEFT|SPEAKER_BACK_RIGHT|SPEAKER_SIDE_LEFT|SPEAKER_SIDE_RIGHT)
#define X7DOT1_WIDE (SPEAKER_FRONT_LEFT|SPEAKER_FRONT_RIGHT|SPEAKER_FRONT_CENTER|SPEAKER_LOW_FREQUENCY|SPEAKER_BACK_LEFT|SPEAKER_BACK_RIGHT|SPEAKER_FRONT_LEFT_OF_CENTER|SPEAKER_FRONT_RIGHT_OF_CENTER)
#define REFTIME_PER_SEC ((REFERENCE_TIME)10000000)
#define DEVNAME_HEAD "OpenAL Soft on "
/* Scales the given value using 64-bit integer math, ceiling the result. */
static inline ALuint64 ScaleCeil(ALuint64 val, ALuint64 new_scale, ALuint64 old_scale)
{
return (val*new_scale + old_scale-1) / old_scale;
}
typedef struct {
al_string name;
al_string endpoint_guid; // obtained from PKEY_AudioEndpoint_GUID , set to "Unknown device GUID" if absent.
WCHAR *devid;
} DevMap;
TYPEDEF_VECTOR(DevMap, vector_DevMap)
static void clear_devlist(vector_DevMap *list)
{
#define CLEAR_DEVMAP(i) do { \
AL_STRING_DEINIT((i)->name); \
AL_STRING_DEINIT((i)->endpoint_guid); \
free((i)->devid); \
(i)->devid = NULL; \
} while(0)
VECTOR_FOR_EACH(DevMap, *list, CLEAR_DEVMAP);
VECTOR_RESIZE(*list, 0, 0);
#undef CLEAR_DEVMAP
}
static vector_DevMap PlaybackDevices;
static vector_DevMap CaptureDevices;
static HANDLE ThreadHdl;
static DWORD ThreadID;
typedef struct {
HANDLE FinishedEvt;
HRESULT result;
} ThreadRequest;
#define WM_USER_First (WM_USER+0)
#define WM_USER_OpenDevice (WM_USER+0)
#define WM_USER_ResetDevice (WM_USER+1)
#define WM_USER_StartDevice (WM_USER+2)
#define WM_USER_StopDevice (WM_USER+3)
#define WM_USER_CloseDevice (WM_USER+4)
#define WM_USER_Enumerate (WM_USER+5)
#define WM_USER_Last (WM_USER+5)
static const char MessageStr[WM_USER_Last+1-WM_USER][20] = {
"Open Device",
"Reset Device",
"Start Device",
"Stop Device",
"Close Device",
"Enumerate Devices",
};
static inline void ReturnMsgResponse(ThreadRequest *req, HRESULT res)
{
req->result = res;
SetEvent(req->FinishedEvt);
}
static HRESULT WaitForResponse(ThreadRequest *req)
{
if(WaitForSingleObject(req->FinishedEvt, INFINITE) == WAIT_OBJECT_0)
return req->result;
ERR("Message response error: %lu\n", GetLastError());
return E_FAIL;
}
static void get_device_name_and_guid(IMMDevice *device, al_string *name, al_string *guid)
{
IPropertyStore *ps;
PROPVARIANT pvname;
PROPVARIANT pvguid;
HRESULT hr;
alstr_copy_cstr(name, DEVNAME_HEAD);
hr = IMMDevice_OpenPropertyStore(device, STGM_READ, &ps);
if(FAILED(hr))
{
WARN("OpenPropertyStore failed: 0x%08lx\n", hr);
alstr_append_cstr(name, "Unknown Device Name");
if(guid!=NULL)alstr_copy_cstr(guid, "Unknown Device GUID");
return;
}
PropVariantInit(&pvname);
hr = IPropertyStore_GetValue(ps, (const PROPERTYKEY*)&DEVPKEY_Device_FriendlyName, &pvname);
if(FAILED(hr))
{
WARN("GetValue Device_FriendlyName failed: 0x%08lx\n", hr);
alstr_append_cstr(name, "Unknown Device Name");
}
else if(pvname.vt == VT_LPWSTR)
alstr_append_wcstr(name, pvname.pwszVal);
else
{
WARN("Unexpected PROPVARIANT type: 0x%04x\n", pvname.vt);
alstr_append_cstr(name, "Unknown Device Name");
}
PropVariantClear(&pvname);
if(guid!=NULL){
PropVariantInit(&pvguid);
hr = IPropertyStore_GetValue(ps, (const PROPERTYKEY*)&PKEY_AudioEndpoint_GUID, &pvguid);
if(FAILED(hr))
{
WARN("GetValue AudioEndpoint_GUID failed: 0x%08lx\n", hr);
alstr_copy_cstr(guid, "Unknown Device GUID");
}
else if(pvguid.vt == VT_LPWSTR)
alstr_copy_wcstr(guid, pvguid.pwszVal);
else
{
WARN("Unexpected PROPVARIANT type: 0x%04x\n", pvguid.vt);
alstr_copy_cstr(guid, "Unknown Device GUID");
}
PropVariantClear(&pvguid);
}
IPropertyStore_Release(ps);
}
static void get_device_formfactor(IMMDevice *device, EndpointFormFactor *formfactor)
{
IPropertyStore *ps;
PROPVARIANT pvform;
HRESULT hr;
hr = IMMDevice_OpenPropertyStore(device, STGM_READ, &ps);
if(FAILED(hr))
{
WARN("OpenPropertyStore failed: 0x%08lx\n", hr);
return;
}
PropVariantInit(&pvform);
hr = IPropertyStore_GetValue(ps, &PKEY_AudioEndpoint_FormFactor, &pvform);
if(FAILED(hr))
WARN("GetValue AudioEndpoint_FormFactor failed: 0x%08lx\n", hr);
else if(pvform.vt == VT_UI4)
*formfactor = pvform.ulVal;
else if(pvform.vt == VT_EMPTY)
*formfactor = UnknownFormFactor;
else
WARN("Unexpected PROPVARIANT type: 0x%04x\n", pvform.vt);
PropVariantClear(&pvform);
IPropertyStore_Release(ps);
}
static void add_device(IMMDevice *device, const WCHAR *devid, vector_DevMap *list)
{
int count = 0;
al_string tmpname;
DevMap entry;
AL_STRING_INIT(tmpname);
AL_STRING_INIT(entry.name);
AL_STRING_INIT(entry.endpoint_guid);
entry.devid = strdupW(devid);
get_device_name_and_guid(device, &tmpname, &entry.endpoint_guid);
while(1)
{
const DevMap *iter;
alstr_copy(&entry.name, tmpname);
if(count != 0)
{
char str[64];
snprintf(str, sizeof(str), " #%d", count+1);
alstr_append_cstr(&entry.name, str);
}
#define MATCH_ENTRY(i) (alstr_cmp(entry.name, (i)->name) == 0)
VECTOR_FIND_IF(iter, const DevMap, *list, MATCH_ENTRY);
if(iter == VECTOR_END(*list)) break;
#undef MATCH_ENTRY
count++;
}
TRACE("Got device \"%s\", \"%s\", \"%ls\"\n", alstr_get_cstr(entry.name), alstr_get_cstr(entry.endpoint_guid), entry.devid);
VECTOR_PUSH_BACK(*list, entry);
AL_STRING_DEINIT(tmpname);
}
static WCHAR *get_device_id(IMMDevice *device)
{
WCHAR *devid;
HRESULT hr;
hr = IMMDevice_GetId(device, &devid);
if(FAILED(hr))
{
ERR("Failed to get device id: %lx\n", hr);
return NULL;
}
return devid;
}
static HRESULT probe_devices(IMMDeviceEnumerator *devenum, EDataFlow flowdir, vector_DevMap *list)
{
IMMDeviceCollection *coll;
IMMDevice *defdev = NULL;
WCHAR *defdevid = NULL;
HRESULT hr;
UINT count;
UINT i;
hr = IMMDeviceEnumerator_EnumAudioEndpoints(devenum, flowdir, DEVICE_STATE_ACTIVE, &coll);
if(FAILED(hr))
{
ERR("Failed to enumerate audio endpoints: 0x%08lx\n", hr);
return hr;
}
count = 0;
hr = IMMDeviceCollection_GetCount(coll, &count);
if(SUCCEEDED(hr) && count > 0)
{
clear_devlist(list);
VECTOR_RESIZE(*list, 0, count);
hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint(devenum, flowdir,
eMultimedia, &defdev);
}
if(SUCCEEDED(hr) && defdev != NULL)
{
defdevid = get_device_id(defdev);
if(defdevid)
add_device(defdev, defdevid, list);
}
for(i = 0;i < count;++i)
{
IMMDevice *device;
WCHAR *devid;
hr = IMMDeviceCollection_Item(coll, i, &device);
if(FAILED(hr)) continue;
devid = get_device_id(device);
if(devid)
{
if(wcscmp(devid, defdevid) != 0)
add_device(device, devid, list);
CoTaskMemFree(devid);
}
IMMDevice_Release(device);
}
if(defdev) IMMDevice_Release(defdev);
if(defdevid) CoTaskMemFree(defdevid);
IMMDeviceCollection_Release(coll);
return S_OK;
}
/* Proxy interface used by the message handler. */
struct ALCmmdevProxyVtable;
typedef struct ALCmmdevProxy {
const struct ALCmmdevProxyVtable *vtbl;
} ALCmmdevProxy;
struct ALCmmdevProxyVtable {
HRESULT (*const openProxy)(ALCmmdevProxy*);
void (*const closeProxy)(ALCmmdevProxy*);
HRESULT (*const resetProxy)(ALCmmdevProxy*);
HRESULT (*const startProxy)(ALCmmdevProxy*);
void (*const stopProxy)(ALCmmdevProxy*);
};
#define DEFINE_ALCMMDEVPROXY_VTABLE(T) \
DECLARE_THUNK(T, ALCmmdevProxy, HRESULT, openProxy) \
DECLARE_THUNK(T, ALCmmdevProxy, void, closeProxy) \
DECLARE_THUNK(T, ALCmmdevProxy, HRESULT, resetProxy) \
DECLARE_THUNK(T, ALCmmdevProxy, HRESULT, startProxy) \
DECLARE_THUNK(T, ALCmmdevProxy, void, stopProxy) \
\
static const struct ALCmmdevProxyVtable T##_ALCmmdevProxy_vtable = { \
T##_ALCmmdevProxy_openProxy, \
T##_ALCmmdevProxy_closeProxy, \
T##_ALCmmdevProxy_resetProxy, \
T##_ALCmmdevProxy_startProxy, \
T##_ALCmmdevProxy_stopProxy, \
}
static void ALCmmdevProxy_Construct(ALCmmdevProxy* UNUSED(self)) { }
static void ALCmmdevProxy_Destruct(ALCmmdevProxy* UNUSED(self)) { }
static DWORD CALLBACK ALCmmdevProxy_messageHandler(void *ptr)
{
ThreadRequest *req = ptr;
IMMDeviceEnumerator *Enumerator;
ALuint deviceCount = 0;
ALCmmdevProxy *proxy;
HRESULT hr, cohr;
MSG msg;
TRACE("Starting message thread\n");
cohr = CoInitialize(NULL);
if(FAILED(cohr))
{
WARN("Failed to initialize COM: 0x%08lx\n", cohr);
ReturnMsgResponse(req, cohr);
return 0;
}
hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER, &IID_IMMDeviceEnumerator, &ptr);
if(FAILED(hr))
{
WARN("Failed to create IMMDeviceEnumerator instance: 0x%08lx\n", hr);
CoUninitialize();
ReturnMsgResponse(req, hr);
return 0;
}
Enumerator = ptr;
IMMDeviceEnumerator_Release(Enumerator);
Enumerator = NULL;
CoUninitialize();
/* HACK: Force Windows to create a message queue for this thread before
* returning success, otherwise PostThreadMessage may fail if it gets
* called before GetMessage.
*/
PeekMessage(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
TRACE("Message thread initialization complete\n");
ReturnMsgResponse(req, S_OK);
TRACE("Starting message loop\n");
while(GetMessage(&msg, NULL, WM_USER_First, WM_USER_Last))
{
TRACE("Got message \"%s\" (0x%04x, lparam=%p, wparam=%p)\n",
(msg.message >= WM_USER && msg.message <= WM_USER_Last) ?
MessageStr[msg.message-WM_USER] : "Unknown",
msg.message, (void*)msg.lParam, (void*)msg.wParam
);
switch(msg.message)
{
case WM_USER_OpenDevice:
req = (ThreadRequest*)msg.wParam;
proxy = (ALCmmdevProxy*)msg.lParam;
hr = cohr = S_OK;
if(++deviceCount == 1)
hr = cohr = CoInitialize(NULL);
if(SUCCEEDED(hr))
hr = V0(proxy,openProxy)();
if(FAILED(hr))
{
if(--deviceCount == 0 && SUCCEEDED(cohr))
CoUninitialize();
}
ReturnMsgResponse(req, hr);
continue;
case WM_USER_ResetDevice:
req = (ThreadRequest*)msg.wParam;
proxy = (ALCmmdevProxy*)msg.lParam;
hr = V0(proxy,resetProxy)();
ReturnMsgResponse(req, hr);
continue;
case WM_USER_StartDevice:
req = (ThreadRequest*)msg.wParam;
proxy = (ALCmmdevProxy*)msg.lParam;
hr = V0(proxy,startProxy)();
ReturnMsgResponse(req, hr);
continue;
case WM_USER_StopDevice:
req = (ThreadRequest*)msg.wParam;
proxy = (ALCmmdevProxy*)msg.lParam;
V0(proxy,stopProxy)();
ReturnMsgResponse(req, S_OK);
continue;
case WM_USER_CloseDevice:
req = (ThreadRequest*)msg.wParam;
proxy = (ALCmmdevProxy*)msg.lParam;
V0(proxy,closeProxy)();
if(--deviceCount == 0)
CoUninitialize();
ReturnMsgResponse(req, S_OK);
continue;
case WM_USER_Enumerate:
req = (ThreadRequest*)msg.wParam;
hr = cohr = S_OK;
if(++deviceCount == 1)
hr = cohr = CoInitialize(NULL);
if(SUCCEEDED(hr))
hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER, &IID_IMMDeviceEnumerator, &ptr);
if(SUCCEEDED(hr))
{
Enumerator = ptr;
if(msg.lParam == ALL_DEVICE_PROBE)
hr = probe_devices(Enumerator, eRender, &PlaybackDevices);
else if(msg.lParam == CAPTURE_DEVICE_PROBE)
hr = probe_devices(Enumerator, eCapture, &CaptureDevices);
IMMDeviceEnumerator_Release(Enumerator);
Enumerator = NULL;
}
if(--deviceCount == 0 && SUCCEEDED(cohr))
CoUninitialize();
ReturnMsgResponse(req, hr);
continue;
default:
ERR("Unexpected message: %u\n", msg.message);
continue;
}
}
TRACE("Message loop finished\n");
return 0;
}
typedef struct ALCmmdevPlayback {
DERIVE_FROM_TYPE(ALCbackend);
DERIVE_FROM_TYPE(ALCmmdevProxy);
WCHAR *devid;
IMMDevice *mmdev;
IAudioClient *client;
IAudioRenderClient *render;
HANDLE NotifyEvent;
HANDLE MsgEvent;
ATOMIC(UINT32) Padding;
ATOMIC(int) killNow;
althrd_t thread;
} ALCmmdevPlayback;
static int ALCmmdevPlayback_mixerProc(void *arg);
static void ALCmmdevPlayback_Construct(ALCmmdevPlayback *self, ALCdevice *device);
static void ALCmmdevPlayback_Destruct(ALCmmdevPlayback *self);
static ALCenum ALCmmdevPlayback_open(ALCmmdevPlayback *self, const ALCchar *name);
static HRESULT ALCmmdevPlayback_openProxy(ALCmmdevPlayback *self);
static void ALCmmdevPlayback_closeProxy(ALCmmdevPlayback *self);
static ALCboolean ALCmmdevPlayback_reset(ALCmmdevPlayback *self);
static HRESULT ALCmmdevPlayback_resetProxy(ALCmmdevPlayback *self);
static ALCboolean ALCmmdevPlayback_start(ALCmmdevPlayback *self);
static HRESULT ALCmmdevPlayback_startProxy(ALCmmdevPlayback *self);
static void ALCmmdevPlayback_stop(ALCmmdevPlayback *self);
static void ALCmmdevPlayback_stopProxy(ALCmmdevPlayback *self);
static DECLARE_FORWARD2(ALCmmdevPlayback, ALCbackend, ALCenum, captureSamples, ALCvoid*, ALCuint)
static DECLARE_FORWARD(ALCmmdevPlayback, ALCbackend, ALCuint, availableSamples)
static ClockLatency ALCmmdevPlayback_getClockLatency(ALCmmdevPlayback *self);
static DECLARE_FORWARD(ALCmmdevPlayback, ALCbackend, void, lock)
static DECLARE_FORWARD(ALCmmdevPlayback, ALCbackend, void, unlock)
DECLARE_DEFAULT_ALLOCATORS(ALCmmdevPlayback)
DEFINE_ALCMMDEVPROXY_VTABLE(ALCmmdevPlayback);
DEFINE_ALCBACKEND_VTABLE(ALCmmdevPlayback);
static void ALCmmdevPlayback_Construct(ALCmmdevPlayback *self, ALCdevice *device)
{
SET_VTABLE2(ALCmmdevPlayback, ALCbackend, self);
SET_VTABLE2(ALCmmdevPlayback, ALCmmdevProxy, self);
ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
ALCmmdevProxy_Construct(STATIC_CAST(ALCmmdevProxy, self));
self->devid = NULL;
self->mmdev = NULL;
self->client = NULL;
self->render = NULL;
self->NotifyEvent = NULL;
self->MsgEvent = NULL;
ATOMIC_INIT(&self->Padding, 0);
ATOMIC_INIT(&self->killNow, 0);
}
static void ALCmmdevPlayback_Destruct(ALCmmdevPlayback *self)
{
if(self->MsgEvent)
{
ThreadRequest req = { self->MsgEvent, 0 };
if(PostThreadMessage(ThreadID, WM_USER_CloseDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
(void)WaitForResponse(&req);
CloseHandle(self->MsgEvent);
self->MsgEvent = NULL;
}
if(self->NotifyEvent)
CloseHandle(self->NotifyEvent);
self->NotifyEvent = NULL;
free(self->devid);
self->devid = NULL;
if(self->NotifyEvent != NULL)
CloseHandle(self->NotifyEvent);
self->NotifyEvent = NULL;
if(self->MsgEvent != NULL)
CloseHandle(self->MsgEvent);
self->MsgEvent = NULL;
free(self->devid);
self->devid = NULL;
ALCmmdevProxy_Destruct(STATIC_CAST(ALCmmdevProxy, self));
ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
}
FORCE_ALIGN static int ALCmmdevPlayback_mixerProc(void *arg)
{
ALCmmdevPlayback *self = arg;
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
UINT32 buffer_len, written;
ALuint update_size, len;
BYTE *buffer;
HRESULT hr;
hr = CoInitialize(NULL);
if(FAILED(hr))
{
ERR("CoInitialize(NULL) failed: 0x%08lx\n", hr);
V0(device->Backend,lock)();
aluHandleDisconnect(device, "COM init failed: 0x%08lx", hr);
V0(device->Backend,unlock)();
return 1;
}
SetRTPriority();
althrd_setname(althrd_current(), MIXER_THREAD_NAME);
update_size = device->UpdateSize;
buffer_len = update_size * device->NumUpdates;
while(!ATOMIC_LOAD(&self->killNow, almemory_order_relaxed))
{
hr = IAudioClient_GetCurrentPadding(self->client, &written);
if(FAILED(hr))
{
ERR("Failed to get padding: 0x%08lx\n", hr);
V0(device->Backend,lock)();
aluHandleDisconnect(device, "Failed to retrieve buffer padding: 0x%08lx", hr);
V0(device->Backend,unlock)();
break;
}
ATOMIC_STORE(&self->Padding, written, almemory_order_relaxed);
len = buffer_len - written;
if(len < update_size)
{
DWORD res;
res = WaitForSingleObjectEx(self->NotifyEvent, 2000, FALSE);
if(res != WAIT_OBJECT_0)
ERR("WaitForSingleObjectEx error: 0x%lx\n", res);
continue;
}
len -= len%update_size;
hr = IAudioRenderClient_GetBuffer(self->render, len, &buffer);
if(SUCCEEDED(hr))
{
ALCmmdevPlayback_lock(self);
aluMixData(device, buffer, len);
ATOMIC_STORE(&self->Padding, written + len, almemory_order_relaxed);
ALCmmdevPlayback_unlock(self);
hr = IAudioRenderClient_ReleaseBuffer(self->render, len, 0);
}
if(FAILED(hr))
{
ERR("Failed to buffer data: 0x%08lx\n", hr);
V0(device->Backend,lock)();
aluHandleDisconnect(device, "Failed to send playback samples: 0x%08lx", hr);
V0(device->Backend,unlock)();
break;
}
}
ATOMIC_STORE(&self->Padding, 0, almemory_order_release);
CoUninitialize();
return 0;
}
static ALCboolean MakeExtensible(WAVEFORMATEXTENSIBLE *out, const WAVEFORMATEX *in)
{
memset(out, 0, sizeof(*out));
if(in->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
*out = *(const WAVEFORMATEXTENSIBLE*)in;
else if(in->wFormatTag == WAVE_FORMAT_PCM)
{
out->Format = *in;
out->Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
out->Format.cbSize = sizeof(*out) - sizeof(*in);
if(out->Format.nChannels == 1)
out->dwChannelMask = MONO;
else if(out->Format.nChannels == 2)
out->dwChannelMask = STEREO;
else
ERR("Unhandled PCM channel count: %d\n", out->Format.nChannels);
out->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
}
else if(in->wFormatTag == WAVE_FORMAT_IEEE_FLOAT)
{
out->Format = *in;
out->Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
out->Format.cbSize = sizeof(*out) - sizeof(*in);
if(out->Format.nChannels == 1)
out->dwChannelMask = MONO;
else if(out->Format.nChannels == 2)
out->dwChannelMask = STEREO;
else
ERR("Unhandled IEEE float channel count: %d\n", out->Format.nChannels);
out->SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
}
else
{
ERR("Unhandled format tag: 0x%04x\n", in->wFormatTag);
return ALC_FALSE;
}
return ALC_TRUE;
}
static ALCenum ALCmmdevPlayback_open(ALCmmdevPlayback *self, const ALCchar *deviceName)
{
HRESULT hr = S_OK;
self->NotifyEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
self->MsgEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
if(self->NotifyEvent == NULL || self->MsgEvent == NULL)
{
ERR("Failed to create message events: %lu\n", GetLastError());
hr = E_FAIL;
}
if(SUCCEEDED(hr))
{
if(deviceName)
{
const DevMap *iter;
if(VECTOR_SIZE(PlaybackDevices) == 0)
{
ThreadRequest req = { self->MsgEvent, 0 };
if(PostThreadMessage(ThreadID, WM_USER_Enumerate, (WPARAM)&req, ALL_DEVICE_PROBE))
(void)WaitForResponse(&req);
}
hr = E_FAIL;
#define MATCH_NAME(i) (alstr_cmp_cstr((i)->name, deviceName) == 0 || \
alstr_cmp_cstr((i)->endpoint_guid, deviceName) == 0)
VECTOR_FIND_IF(iter, const DevMap, PlaybackDevices, MATCH_NAME);
#undef MATCH_NAME
if(iter == VECTOR_END(PlaybackDevices))
{
int len;
if((len=MultiByteToWideChar(CP_UTF8, 0, deviceName, -1, NULL, 0)) > 0)
{
WCHAR *wname = calloc(sizeof(WCHAR), len);
MultiByteToWideChar(CP_UTF8, 0, deviceName, -1, wname, len);
#define MATCH_NAME(i) (wcscmp((i)->devid, wname) == 0)
VECTOR_FIND_IF(iter, const DevMap, PlaybackDevices, MATCH_NAME);
#undef MATCH_NAME
free(wname);
}
}
if(iter == VECTOR_END(PlaybackDevices))
WARN("Failed to find device name matching \"%s\"\n", deviceName);
else
{
ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
self->devid = strdupW(iter->devid);
alstr_copy(&device->DeviceName, iter->name);
hr = S_OK;
}
}
}
if(SUCCEEDED(hr))
{
ThreadRequest req = { self->MsgEvent, 0 };
hr = E_FAIL;
if(PostThreadMessage(ThreadID, WM_USER_OpenDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
hr = WaitForResponse(&req);
else
ERR("Failed to post thread message: %lu\n", GetLastError());
}
if(FAILED(hr))
{
if(self->NotifyEvent != NULL)
CloseHandle(self->NotifyEvent);
self->NotifyEvent = NULL;
if(self->MsgEvent != NULL)
CloseHandle(self->MsgEvent);
self->MsgEvent = NULL;
free(self->devid);
self->devid = NULL;
ERR("Device init failed: 0x%08lx\n", hr);
return ALC_INVALID_VALUE;
}
return ALC_NO_ERROR;
}
static HRESULT ALCmmdevPlayback_openProxy(ALCmmdevPlayback *self)
{
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
void *ptr;
HRESULT hr;
hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER, &IID_IMMDeviceEnumerator, &ptr);
if(SUCCEEDED(hr))
{
IMMDeviceEnumerator *Enumerator = ptr;
if(!self->devid)
hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint(Enumerator, eRender, eMultimedia, &self->mmdev);
else
hr = IMMDeviceEnumerator_GetDevice(Enumerator, self->devid, &self->mmdev);
IMMDeviceEnumerator_Release(Enumerator);
Enumerator = NULL;
}
if(SUCCEEDED(hr))
hr = IMMDevice_Activate(self->mmdev, &IID_IAudioClient, CLSCTX_INPROC_SERVER, NULL, &ptr);
if(SUCCEEDED(hr))
{
self->client = ptr;
if(alstr_empty(device->DeviceName))
get_device_name_and_guid(self->mmdev, &device->DeviceName, NULL);
}
if(FAILED(hr))
{
if(self->mmdev)
IMMDevice_Release(self->mmdev);
self->mmdev = NULL;
}
return hr;
}
static void ALCmmdevPlayback_closeProxy(ALCmmdevPlayback *self)
{
if(self->client)
IAudioClient_Release(self->client);
self->client = NULL;
if(self->mmdev)
IMMDevice_Release(self->mmdev);
self->mmdev = NULL;
}
static ALCboolean ALCmmdevPlayback_reset(ALCmmdevPlayback *self)
{
ThreadRequest req = { self->MsgEvent, 0 };
HRESULT hr = E_FAIL;
if(PostThreadMessage(ThreadID, WM_USER_ResetDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
hr = WaitForResponse(&req);
return SUCCEEDED(hr) ? ALC_TRUE : ALC_FALSE;
}
static HRESULT ALCmmdevPlayback_resetProxy(ALCmmdevPlayback *self)
{
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
EndpointFormFactor formfactor = UnknownFormFactor;
WAVEFORMATEXTENSIBLE OutputType;
WAVEFORMATEX *wfx = NULL;
REFERENCE_TIME min_per, buf_time;
UINT32 buffer_len, min_len;
void *ptr = NULL;
HRESULT hr;
if(self->client)
IAudioClient_Release(self->client);
self->client = NULL;
hr = IMMDevice_Activate(self->mmdev, &IID_IAudioClient, CLSCTX_INPROC_SERVER, NULL, &ptr);
if(FAILED(hr))
{
ERR("Failed to reactivate audio client: 0x%08lx\n", hr);
return hr;
}
self->client = ptr;
hr = IAudioClient_GetMixFormat(self->client, &wfx);
if(FAILED(hr))
{
ERR("Failed to get mix format: 0x%08lx\n", hr);
return hr;
}
if(!MakeExtensible(&OutputType, wfx))
{
CoTaskMemFree(wfx);
return E_FAIL;
}
CoTaskMemFree(wfx);
wfx = NULL;
buf_time = ScaleCeil(device->UpdateSize*device->NumUpdates, REFTIME_PER_SEC,
device->Frequency);
if(!(device->Flags&DEVICE_FREQUENCY_REQUEST))
device->Frequency = OutputType.Format.nSamplesPerSec;
if(!(device->Flags&DEVICE_CHANNELS_REQUEST))
{
if(OutputType.Format.nChannels == 1 && OutputType.dwChannelMask == MONO)
device->FmtChans = DevFmtMono;
else if(OutputType.Format.nChannels == 2 && OutputType.dwChannelMask == STEREO)
device->FmtChans = DevFmtStereo;
else if(OutputType.Format.nChannels == 4 && OutputType.dwChannelMask == QUAD)
device->FmtChans = DevFmtQuad;
else if(OutputType.Format.nChannels == 6 && OutputType.dwChannelMask == X5DOT1)
device->FmtChans = DevFmtX51;
else if(OutputType.Format.nChannels == 6 && OutputType.dwChannelMask == X5DOT1REAR)
device->FmtChans = DevFmtX51Rear;
else if(OutputType.Format.nChannels == 7 && OutputType.dwChannelMask == X6DOT1)
device->FmtChans = DevFmtX61;
else if(OutputType.Format.nChannels == 8 && (OutputType.dwChannelMask == X7DOT1 || OutputType.dwChannelMask == X7DOT1_WIDE))
device->FmtChans = DevFmtX71;
else
ERR("Unhandled channel config: %d -- 0x%08lx\n", OutputType.Format.nChannels, OutputType.dwChannelMask);
}
switch(device->FmtChans)
{
case DevFmtMono:
OutputType.Format.nChannels = 1;
OutputType.dwChannelMask = MONO;
break;
case DevFmtAmbi3D:
device->FmtChans = DevFmtStereo;
/*fall-through*/
case DevFmtStereo:
OutputType.Format.nChannels = 2;
OutputType.dwChannelMask = STEREO;
break;
case DevFmtQuad:
OutputType.Format.nChannels = 4;
OutputType.dwChannelMask = QUAD;
break;
case DevFmtX51:
OutputType.Format.nChannels = 6;
OutputType.dwChannelMask = X5DOT1;
break;
case DevFmtX51Rear:
OutputType.Format.nChannels = 6;
OutputType.dwChannelMask = X5DOT1REAR;
break;
case DevFmtX61:
OutputType.Format.nChannels = 7;
OutputType.dwChannelMask = X6DOT1;
break;
case DevFmtX71:
OutputType.Format.nChannels = 8;
OutputType.dwChannelMask = X7DOT1;
break;
}
switch(device->FmtType)
{
case DevFmtByte:
device->FmtType = DevFmtUByte;
/* fall-through */
case DevFmtUByte:
OutputType.Format.wBitsPerSample = 8;
OutputType.Samples.wValidBitsPerSample = 8;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtUShort:
device->FmtType = DevFmtShort;
/* fall-through */
case DevFmtShort:
OutputType.Format.wBitsPerSample = 16;
OutputType.Samples.wValidBitsPerSample = 16;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtUInt:
device->FmtType = DevFmtInt;
/* fall-through */
case DevFmtInt:
OutputType.Format.wBitsPerSample = 32;
OutputType.Samples.wValidBitsPerSample = 32;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtFloat:
OutputType.Format.wBitsPerSample = 32;
OutputType.Samples.wValidBitsPerSample = 32;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
break;
}
OutputType.Format.nSamplesPerSec = device->Frequency;
OutputType.Format.nBlockAlign = OutputType.Format.nChannels *
OutputType.Format.wBitsPerSample / 8;
OutputType.Format.nAvgBytesPerSec = OutputType.Format.nSamplesPerSec *
OutputType.Format.nBlockAlign;
hr = IAudioClient_IsFormatSupported(self->client, AUDCLNT_SHAREMODE_SHARED, &OutputType.Format, &wfx);
if(FAILED(hr))
{
ERR("Failed to check format support: 0x%08lx\n", hr);
hr = IAudioClient_GetMixFormat(self->client, &wfx);
}
if(FAILED(hr))
{
ERR("Failed to find a supported format: 0x%08lx\n", hr);
return hr;
}
if(wfx != NULL)
{
if(!MakeExtensible(&OutputType, wfx))
{
CoTaskMemFree(wfx);
return E_FAIL;
}
CoTaskMemFree(wfx);
wfx = NULL;
device->Frequency = OutputType.Format.nSamplesPerSec;
if(OutputType.Format.nChannels == 1 && OutputType.dwChannelMask == MONO)
device->FmtChans = DevFmtMono;
else if(OutputType.Format.nChannels == 2 && OutputType.dwChannelMask == STEREO)
device->FmtChans = DevFmtStereo;
else if(OutputType.Format.nChannels == 4 && OutputType.dwChannelMask == QUAD)
device->FmtChans = DevFmtQuad;
else if(OutputType.Format.nChannels == 6 && OutputType.dwChannelMask == X5DOT1)
device->FmtChans = DevFmtX51;
else if(OutputType.Format.nChannels == 6 && OutputType.dwChannelMask == X5DOT1REAR)
device->FmtChans = DevFmtX51Rear;
else if(OutputType.Format.nChannels == 7 && OutputType.dwChannelMask == X6DOT1)
device->FmtChans = DevFmtX61;
else if(OutputType.Format.nChannels == 8 && (OutputType.dwChannelMask == X7DOT1 || OutputType.dwChannelMask == X7DOT1_WIDE))
device->FmtChans = DevFmtX71;
else
{
ERR("Unhandled extensible channels: %d -- 0x%08lx\n", OutputType.Format.nChannels, OutputType.dwChannelMask);
device->FmtChans = DevFmtStereo;
OutputType.Format.nChannels = 2;
OutputType.dwChannelMask = STEREO;
}
if(IsEqualGUID(&OutputType.SubFormat, &KSDATAFORMAT_SUBTYPE_PCM))
{
if(OutputType.Format.wBitsPerSample == 8)
device->FmtType = DevFmtUByte;
else if(OutputType.Format.wBitsPerSample == 16)
device->FmtType = DevFmtShort;
else if(OutputType.Format.wBitsPerSample == 32)
device->FmtType = DevFmtInt;
else
{
device->FmtType = DevFmtShort;
OutputType.Format.wBitsPerSample = 16;
}
}
else if(IsEqualGUID(&OutputType.SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT))
{
device->FmtType = DevFmtFloat;
OutputType.Format.wBitsPerSample = 32;
}
else
{
ERR("Unhandled format sub-type\n");
device->FmtType = DevFmtShort;
OutputType.Format.wBitsPerSample = 16;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
}
OutputType.Samples.wValidBitsPerSample = OutputType.Format.wBitsPerSample;
}
get_device_formfactor(self->mmdev, &formfactor);
device->IsHeadphones = (device->FmtChans == DevFmtStereo &&
(formfactor == Headphones || formfactor == Headset)
);
SetDefaultWFXChannelOrder(device);
hr = IAudioClient_Initialize(self->client, AUDCLNT_SHAREMODE_SHARED,
AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
buf_time, 0, &OutputType.Format, NULL);
if(FAILED(hr))
{
ERR("Failed to initialize audio client: 0x%08lx\n", hr);
return hr;
}
hr = IAudioClient_GetDevicePeriod(self->client, &min_per, NULL);
if(SUCCEEDED(hr))
{
min_len = (UINT32)ScaleCeil(min_per, device->Frequency, REFTIME_PER_SEC);
/* Find the nearest multiple of the period size to the update size */
if(min_len < device->UpdateSize)
min_len *= (device->UpdateSize + min_len/2)/min_len;
hr = IAudioClient_GetBufferSize(self->client, &buffer_len);
}
if(FAILED(hr))
{
ERR("Failed to get audio buffer info: 0x%08lx\n", hr);
return hr;
}
device->UpdateSize = min_len;
device->NumUpdates = buffer_len / device->UpdateSize;
if(device->NumUpdates <= 1)
{
ERR("Audio client returned buffer_len < period*2; expect break up\n");
device->NumUpdates = 2;
device->UpdateSize = buffer_len / device->NumUpdates;
}
hr = IAudioClient_SetEventHandle(self->client, self->NotifyEvent);
if(FAILED(hr))
{
ERR("Failed to set event handle: 0x%08lx\n", hr);
return hr;
}
return hr;
}
static ALCboolean ALCmmdevPlayback_start(ALCmmdevPlayback *self)
{
ThreadRequest req = { self->MsgEvent, 0 };
HRESULT hr = E_FAIL;
if(PostThreadMessage(ThreadID, WM_USER_StartDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
hr = WaitForResponse(&req);
return SUCCEEDED(hr) ? ALC_TRUE : ALC_FALSE;
}
static HRESULT ALCmmdevPlayback_startProxy(ALCmmdevPlayback *self)
{
HRESULT hr;
void *ptr;
ResetEvent(self->NotifyEvent);
hr = IAudioClient_Start(self->client);
if(FAILED(hr))
ERR("Failed to start audio client: 0x%08lx\n", hr);
if(SUCCEEDED(hr))
hr = IAudioClient_GetService(self->client, &IID_IAudioRenderClient, &ptr);
if(SUCCEEDED(hr))
{
self->render = ptr;
ATOMIC_STORE(&self->killNow, 0, almemory_order_release);
if(althrd_create(&self->thread, ALCmmdevPlayback_mixerProc, self) != althrd_success)
{
if(self->render)
IAudioRenderClient_Release(self->render);
self->render = NULL;
IAudioClient_Stop(self->client);
ERR("Failed to start thread\n");
hr = E_FAIL;
}
}
return hr;
}
static void ALCmmdevPlayback_stop(ALCmmdevPlayback *self)
{
ThreadRequest req = { self->MsgEvent, 0 };
if(PostThreadMessage(ThreadID, WM_USER_StopDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
(void)WaitForResponse(&req);
}
static void ALCmmdevPlayback_stopProxy(ALCmmdevPlayback *self)
{
int res;
if(!self->render)
return;
ATOMIC_STORE_SEQ(&self->killNow, 1);
althrd_join(self->thread, &res);
IAudioRenderClient_Release(self->render);
self->render = NULL;
IAudioClient_Stop(self->client);
}
static ClockLatency ALCmmdevPlayback_getClockLatency(ALCmmdevPlayback *self)
{
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
ClockLatency ret;
ALCmmdevPlayback_lock(self);
ret.ClockTime = GetDeviceClockTime(device);
ret.Latency = ATOMIC_LOAD(&self->Padding, almemory_order_relaxed) * DEVICE_CLOCK_RES /
device->Frequency;
ALCmmdevPlayback_unlock(self);
return ret;
}
typedef struct ALCmmdevCapture {
DERIVE_FROM_TYPE(ALCbackend);
DERIVE_FROM_TYPE(ALCmmdevProxy);
WCHAR *devid;
IMMDevice *mmdev;
IAudioClient *client;
IAudioCaptureClient *capture;
HANDLE NotifyEvent;
HANDLE MsgEvent;
ChannelConverter *ChannelConv;
SampleConverter *SampleConv;
ll_ringbuffer_t *Ring;
ATOMIC(int) killNow;
althrd_t thread;
} ALCmmdevCapture;
static int ALCmmdevCapture_recordProc(void *arg);
static void ALCmmdevCapture_Construct(ALCmmdevCapture *self, ALCdevice *device);
static void ALCmmdevCapture_Destruct(ALCmmdevCapture *self);
static ALCenum ALCmmdevCapture_open(ALCmmdevCapture *self, const ALCchar *name);
static HRESULT ALCmmdevCapture_openProxy(ALCmmdevCapture *self);
static void ALCmmdevCapture_closeProxy(ALCmmdevCapture *self);
static DECLARE_FORWARD(ALCmmdevCapture, ALCbackend, ALCboolean, reset)
static HRESULT ALCmmdevCapture_resetProxy(ALCmmdevCapture *self);
static ALCboolean ALCmmdevCapture_start(ALCmmdevCapture *self);
static HRESULT ALCmmdevCapture_startProxy(ALCmmdevCapture *self);
static void ALCmmdevCapture_stop(ALCmmdevCapture *self);
static void ALCmmdevCapture_stopProxy(ALCmmdevCapture *self);
static ALCenum ALCmmdevCapture_captureSamples(ALCmmdevCapture *self, ALCvoid *buffer, ALCuint samples);
static ALuint ALCmmdevCapture_availableSamples(ALCmmdevCapture *self);
static DECLARE_FORWARD(ALCmmdevCapture, ALCbackend, ClockLatency, getClockLatency)
static DECLARE_FORWARD(ALCmmdevCapture, ALCbackend, void, lock)
static DECLARE_FORWARD(ALCmmdevCapture, ALCbackend, void, unlock)
DECLARE_DEFAULT_ALLOCATORS(ALCmmdevCapture)
DEFINE_ALCMMDEVPROXY_VTABLE(ALCmmdevCapture);
DEFINE_ALCBACKEND_VTABLE(ALCmmdevCapture);
static void ALCmmdevCapture_Construct(ALCmmdevCapture *self, ALCdevice *device)
{
SET_VTABLE2(ALCmmdevCapture, ALCbackend, self);
SET_VTABLE2(ALCmmdevCapture, ALCmmdevProxy, self);
ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
ALCmmdevProxy_Construct(STATIC_CAST(ALCmmdevProxy, self));
self->devid = NULL;
self->mmdev = NULL;
self->client = NULL;
self->capture = NULL;
self->NotifyEvent = NULL;
self->MsgEvent = NULL;
self->ChannelConv = NULL;
self->SampleConv = NULL;
self->Ring = NULL;
ATOMIC_INIT(&self->killNow, 0);
}
static void ALCmmdevCapture_Destruct(ALCmmdevCapture *self)
{
if(self->MsgEvent)
{
ThreadRequest req = { self->MsgEvent, 0 };
if(PostThreadMessage(ThreadID, WM_USER_CloseDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
(void)WaitForResponse(&req);
CloseHandle(self->MsgEvent);
self->MsgEvent = NULL;
}
if(self->NotifyEvent != NULL)
CloseHandle(self->NotifyEvent);
self->NotifyEvent = NULL;
ll_ringbuffer_free(self->Ring);
self->Ring = NULL;
DestroySampleConverter(&self->SampleConv);
DestroyChannelConverter(&self->ChannelConv);
free(self->devid);
self->devid = NULL;
ALCmmdevProxy_Destruct(STATIC_CAST(ALCmmdevProxy, self));
ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
}
FORCE_ALIGN int ALCmmdevCapture_recordProc(void *arg)
{
ALCmmdevCapture *self = arg;
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
ALfloat *samples = NULL;
size_t samplesmax = 0;
HRESULT hr;
hr = CoInitialize(NULL);
if(FAILED(hr))
{
ERR("CoInitialize(NULL) failed: 0x%08lx\n", hr);
V0(device->Backend,lock)();
aluHandleDisconnect(device, "COM init failed: 0x%08lx", hr);
V0(device->Backend,unlock)();
return 1;
}
althrd_setname(althrd_current(), RECORD_THREAD_NAME);
while(!ATOMIC_LOAD(&self->killNow, almemory_order_relaxed))
{
UINT32 avail;
DWORD res;
hr = IAudioCaptureClient_GetNextPacketSize(self->capture, &avail);
if(FAILED(hr))
ERR("Failed to get next packet size: 0x%08lx\n", hr);
else if(avail > 0)
{
UINT32 numsamples;
DWORD flags;
BYTE *rdata;
hr = IAudioCaptureClient_GetBuffer(self->capture,
&rdata, &numsamples, &flags, NULL, NULL
);
if(FAILED(hr))
ERR("Failed to get capture buffer: 0x%08lx\n", hr);
else
{
ll_ringbuffer_data_t data[2];
size_t dstframes = 0;
if(self->ChannelConv)
{
if(samplesmax < numsamples)
{
size_t newmax = RoundUp(numsamples, 4096);
ALfloat *tmp = al_calloc(DEF_ALIGN, newmax*2*sizeof(ALfloat));
al_free(samples);
samples = tmp;
samplesmax = newmax;
}
ChannelConverterInput(self->ChannelConv, rdata, samples, numsamples);
rdata = (BYTE*)samples;
}
ll_ringbuffer_get_write_vector(self->Ring, data);
if(self->SampleConv)
{
const ALvoid *srcdata = rdata;
ALsizei srcframes = numsamples;
dstframes = SampleConverterInput(self->SampleConv,
&srcdata, &srcframes, data[0].buf, (ALsizei)minz(data[0].len, INT_MAX)
);
if(srcframes > 0 && dstframes == data[0].len && data[1].len > 0)
{
/* If some source samples remain, all of the first dest
* block was filled, and there's space in the second
* dest block, do another run for the second block.
*/
dstframes += SampleConverterInput(self->SampleConv,
&srcdata, &srcframes, data[1].buf, (ALsizei)minz(data[1].len, INT_MAX)
);
}
}
else
{
ALuint framesize = FrameSizeFromDevFmt(device->FmtChans, device->FmtType,
device->AmbiOrder);
size_t len1 = minz(data[0].len, numsamples);
size_t len2 = minz(data[1].len, numsamples-len1);
memcpy(data[0].buf, rdata, len1*framesize);
if(len2 > 0)
memcpy(data[1].buf, rdata+len1*framesize, len2*framesize);
dstframes = len1 + len2;
}
ll_ringbuffer_write_advance(self->Ring, dstframes);
hr = IAudioCaptureClient_ReleaseBuffer(self->capture, numsamples);
if(FAILED(hr)) ERR("Failed to release capture buffer: 0x%08lx\n", hr);
}
}
if(FAILED(hr))
{
V0(device->Backend,lock)();
aluHandleDisconnect(device, "Failed to capture samples: 0x%08lx", hr);
V0(device->Backend,unlock)();
break;
}
res = WaitForSingleObjectEx(self->NotifyEvent, 2000, FALSE);
if(res != WAIT_OBJECT_0)
ERR("WaitForSingleObjectEx error: 0x%lx\n", res);
}
al_free(samples);
samples = NULL;
samplesmax = 0;
CoUninitialize();
return 0;
}
static ALCenum ALCmmdevCapture_open(ALCmmdevCapture *self, const ALCchar *deviceName)
{
HRESULT hr = S_OK;
self->NotifyEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
self->MsgEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
if(self->NotifyEvent == NULL || self->MsgEvent == NULL)
{
ERR("Failed to create message events: %lu\n", GetLastError());
hr = E_FAIL;
}
if(SUCCEEDED(hr))
{
if(deviceName)
{
const DevMap *iter;
if(VECTOR_SIZE(CaptureDevices) == 0)
{
ThreadRequest req = { self->MsgEvent, 0 };
if(PostThreadMessage(ThreadID, WM_USER_Enumerate, (WPARAM)&req, CAPTURE_DEVICE_PROBE))
(void)WaitForResponse(&req);
}
hr = E_FAIL;
#define MATCH_NAME(i) (alstr_cmp_cstr((i)->name, deviceName) == 0 || \
alstr_cmp_cstr((i)->endpoint_guid, deviceName) == 0)
VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_NAME);
#undef MATCH_NAME
if(iter == VECTOR_END(CaptureDevices))
{
int len;
if((len=MultiByteToWideChar(CP_UTF8, 0, deviceName, -1, NULL, 0)) > 0)
{
WCHAR *wname = calloc(sizeof(WCHAR), len);
MultiByteToWideChar(CP_UTF8, 0, deviceName, -1, wname, len);
#define MATCH_NAME(i) (wcscmp((i)->devid, wname) == 0)
VECTOR_FIND_IF(iter, const DevMap, CaptureDevices, MATCH_NAME);
#undef MATCH_NAME
free(wname);
}
}
if(iter == VECTOR_END(CaptureDevices))
WARN("Failed to find device name matching \"%s\"\n", deviceName);
else
{
ALCdevice *device = STATIC_CAST(ALCbackend,self)->mDevice;
self->devid = strdupW(iter->devid);
alstr_copy(&device->DeviceName, iter->name);
hr = S_OK;
}
}
}
if(SUCCEEDED(hr))
{
ThreadRequest req = { self->MsgEvent, 0 };
hr = E_FAIL;
if(PostThreadMessage(ThreadID, WM_USER_OpenDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
hr = WaitForResponse(&req);
else
ERR("Failed to post thread message: %lu\n", GetLastError());
}
if(FAILED(hr))
{
if(self->NotifyEvent != NULL)
CloseHandle(self->NotifyEvent);
self->NotifyEvent = NULL;
if(self->MsgEvent != NULL)
CloseHandle(self->MsgEvent);
self->MsgEvent = NULL;
free(self->devid);
self->devid = NULL;
ERR("Device init failed: 0x%08lx\n", hr);
return ALC_INVALID_VALUE;
}
else
{
ThreadRequest req = { self->MsgEvent, 0 };
hr = E_FAIL;
if(PostThreadMessage(ThreadID, WM_USER_ResetDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
hr = WaitForResponse(&req);
else
ERR("Failed to post thread message: %lu\n", GetLastError());
if(FAILED(hr))
{
if(hr == E_OUTOFMEMORY)
return ALC_OUT_OF_MEMORY;
return ALC_INVALID_VALUE;
}
}
return ALC_NO_ERROR;
}
static HRESULT ALCmmdevCapture_openProxy(ALCmmdevCapture *self)
{
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
void *ptr;
HRESULT hr;
hr = CoCreateInstance(&CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER, &IID_IMMDeviceEnumerator, &ptr);
if(SUCCEEDED(hr))
{
IMMDeviceEnumerator *Enumerator = ptr;
if(!self->devid)
hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint(Enumerator, eCapture, eMultimedia, &self->mmdev);
else
hr = IMMDeviceEnumerator_GetDevice(Enumerator, self->devid, &self->mmdev);
IMMDeviceEnumerator_Release(Enumerator);
Enumerator = NULL;
}
if(SUCCEEDED(hr))
hr = IMMDevice_Activate(self->mmdev, &IID_IAudioClient, CLSCTX_INPROC_SERVER, NULL, &ptr);
if(SUCCEEDED(hr))
{
self->client = ptr;
if(alstr_empty(device->DeviceName))
get_device_name_and_guid(self->mmdev, &device->DeviceName, NULL);
}
if(FAILED(hr))
{
if(self->mmdev)
IMMDevice_Release(self->mmdev);
self->mmdev = NULL;
}
return hr;
}
static void ALCmmdevCapture_closeProxy(ALCmmdevCapture *self)
{
if(self->client)
IAudioClient_Release(self->client);
self->client = NULL;
if(self->mmdev)
IMMDevice_Release(self->mmdev);
self->mmdev = NULL;
}
static HRESULT ALCmmdevCapture_resetProxy(ALCmmdevCapture *self)
{
ALCdevice *device = STATIC_CAST(ALCbackend, self)->mDevice;
WAVEFORMATEXTENSIBLE OutputType;
WAVEFORMATEX *wfx = NULL;
enum DevFmtType srcType;
REFERENCE_TIME buf_time;
UINT32 buffer_len;
void *ptr = NULL;
HRESULT hr;
if(self->client)
IAudioClient_Release(self->client);
self->client = NULL;
hr = IMMDevice_Activate(self->mmdev, &IID_IAudioClient, CLSCTX_INPROC_SERVER, NULL, &ptr);
if(FAILED(hr))
{
ERR("Failed to reactivate audio client: 0x%08lx\n", hr);
return hr;
}
self->client = ptr;
buf_time = ScaleCeil(device->UpdateSize*device->NumUpdates, REFTIME_PER_SEC,
device->Frequency);
// Make sure buffer is at least 100ms in size
buf_time = maxu64(buf_time, REFTIME_PER_SEC/10);
device->UpdateSize = (ALuint)ScaleCeil(buf_time, device->Frequency, REFTIME_PER_SEC) /
device->NumUpdates;
OutputType.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
switch(device->FmtChans)
{
case DevFmtMono:
OutputType.Format.nChannels = 1;
OutputType.dwChannelMask = MONO;
break;
case DevFmtStereo:
OutputType.Format.nChannels = 2;
OutputType.dwChannelMask = STEREO;
break;
case DevFmtQuad:
OutputType.Format.nChannels = 4;
OutputType.dwChannelMask = QUAD;
break;
case DevFmtX51:
OutputType.Format.nChannels = 6;
OutputType.dwChannelMask = X5DOT1;
break;
case DevFmtX51Rear:
OutputType.Format.nChannels = 6;
OutputType.dwChannelMask = X5DOT1REAR;
break;
case DevFmtX61:
OutputType.Format.nChannels = 7;
OutputType.dwChannelMask = X6DOT1;
break;
case DevFmtX71:
OutputType.Format.nChannels = 8;
OutputType.dwChannelMask = X7DOT1;
break;
case DevFmtAmbi3D:
return E_FAIL;
}
switch(device->FmtType)
{
/* NOTE: Signedness doesn't matter, the converter will handle it. */
case DevFmtByte:
case DevFmtUByte:
OutputType.Format.wBitsPerSample = 8;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtShort:
case DevFmtUShort:
OutputType.Format.wBitsPerSample = 16;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtInt:
case DevFmtUInt:
OutputType.Format.wBitsPerSample = 32;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtFloat:
OutputType.Format.wBitsPerSample = 32;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
break;
}
OutputType.Samples.wValidBitsPerSample = OutputType.Format.wBitsPerSample;
OutputType.Format.nSamplesPerSec = device->Frequency;
OutputType.Format.nBlockAlign = OutputType.Format.nChannels *
OutputType.Format.wBitsPerSample / 8;
OutputType.Format.nAvgBytesPerSec = OutputType.Format.nSamplesPerSec *
OutputType.Format.nBlockAlign;
OutputType.Format.cbSize = sizeof(OutputType) - sizeof(OutputType.Format);
hr = IAudioClient_IsFormatSupported(self->client,
AUDCLNT_SHAREMODE_SHARED, &OutputType.Format, &wfx
);
if(FAILED(hr))
{
ERR("Failed to check format support: 0x%08lx\n", hr);
return hr;
}
DestroySampleConverter(&self->SampleConv);
DestroyChannelConverter(&self->ChannelConv);
if(wfx != NULL)
{
if(!(wfx->nChannels == OutputType.Format.nChannels ||
(wfx->nChannels == 1 && OutputType.Format.nChannels == 2) ||
(wfx->nChannels == 2 && OutputType.Format.nChannels == 1)))
{
ERR("Failed to get matching format, wanted: %s %s %uhz, got: %d channel%s %d-bit %luhz\n",
DevFmtChannelsString(device->FmtChans), DevFmtTypeString(device->FmtType),
device->Frequency, wfx->nChannels, (wfx->nChannels==1)?"":"s", wfx->wBitsPerSample,
wfx->nSamplesPerSec);
CoTaskMemFree(wfx);
return E_FAIL;
}
if(!MakeExtensible(&OutputType, wfx))
{
CoTaskMemFree(wfx);
return E_FAIL;
}
CoTaskMemFree(wfx);
wfx = NULL;
}
if(IsEqualGUID(&OutputType.SubFormat, &KSDATAFORMAT_SUBTYPE_PCM))
{
if(OutputType.Format.wBitsPerSample == 8)
srcType = DevFmtUByte;
else if(OutputType.Format.wBitsPerSample == 16)
srcType = DevFmtShort;
else if(OutputType.Format.wBitsPerSample == 32)
srcType = DevFmtInt;
else
{
ERR("Unhandled integer bit depth: %d\n", OutputType.Format.wBitsPerSample);
return E_FAIL;
}
}
else if(IsEqualGUID(&OutputType.SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT))
{
if(OutputType.Format.wBitsPerSample == 32)
srcType = DevFmtFloat;
else
{
ERR("Unhandled float bit depth: %d\n", OutputType.Format.wBitsPerSample);
return E_FAIL;
}
}
else
{
ERR("Unhandled format sub-type\n");
return E_FAIL;
}
if(device->FmtChans == DevFmtMono && OutputType.Format.nChannels == 2)
{
self->ChannelConv = CreateChannelConverter(srcType, DevFmtStereo,
device->FmtChans);
if(!self->ChannelConv)
{
ERR("Failed to create %s stereo-to-mono converter\n", DevFmtTypeString(srcType));
return E_FAIL;
}
TRACE("Created %s stereo-to-mono converter\n", DevFmtTypeString(srcType));
/* The channel converter always outputs float, so change the input type
* for the resampler/type-converter.
*/
srcType = DevFmtFloat;
}
else if(device->FmtChans == DevFmtStereo && OutputType.Format.nChannels == 1)
{
self->ChannelConv = CreateChannelConverter(srcType, DevFmtMono,
device->FmtChans);
if(!self->ChannelConv)
{
ERR("Failed to create %s mono-to-stereo converter\n", DevFmtTypeString(srcType));
return E_FAIL;
}
TRACE("Created %s mono-to-stereo converter\n", DevFmtTypeString(srcType));
srcType = DevFmtFloat;
}
if(device->Frequency != OutputType.Format.nSamplesPerSec || device->FmtType != srcType)
{
self->SampleConv = CreateSampleConverter(
srcType, device->FmtType, ChannelsFromDevFmt(device->FmtChans, device->AmbiOrder),
OutputType.Format.nSamplesPerSec, device->Frequency
);
if(!self->SampleConv)
{
ERR("Failed to create converter for %s format, dst: %s %uhz, src: %s %luhz\n",
DevFmtChannelsString(device->FmtChans), DevFmtTypeString(device->FmtType),
device->Frequency, DevFmtTypeString(srcType), OutputType.Format.nSamplesPerSec);
return E_FAIL;
}
TRACE("Created converter for %s format, dst: %s %uhz, src: %s %luhz\n",
DevFmtChannelsString(device->FmtChans), DevFmtTypeString(device->FmtType),
device->Frequency, DevFmtTypeString(srcType), OutputType.Format.nSamplesPerSec);
}
hr = IAudioClient_Initialize(self->client,
AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
buf_time, 0, &OutputType.Format, NULL
);
if(FAILED(hr))
{
ERR("Failed to initialize audio client: 0x%08lx\n", hr);
return hr;
}
hr = IAudioClient_GetBufferSize(self->client, &buffer_len);
if(FAILED(hr))
{
ERR("Failed to get buffer size: 0x%08lx\n", hr);
return hr;
}
buffer_len = maxu(device->UpdateSize*device->NumUpdates, buffer_len);
ll_ringbuffer_free(self->Ring);
self->Ring = ll_ringbuffer_create(buffer_len,
FrameSizeFromDevFmt(device->FmtChans, device->FmtType, device->AmbiOrder),
false
);
if(!self->Ring)
{
ERR("Failed to allocate capture ring buffer\n");
return E_OUTOFMEMORY;
}
hr = IAudioClient_SetEventHandle(self->client, self->NotifyEvent);
if(FAILED(hr))
{
ERR("Failed to set event handle: 0x%08lx\n", hr);
return hr;
}
return hr;
}
static ALCboolean ALCmmdevCapture_start(ALCmmdevCapture *self)
{
ThreadRequest req = { self->MsgEvent, 0 };
HRESULT hr = E_FAIL;
if(PostThreadMessage(ThreadID, WM_USER_StartDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
hr = WaitForResponse(&req);
return SUCCEEDED(hr) ? ALC_TRUE : ALC_FALSE;
}
static HRESULT ALCmmdevCapture_startProxy(ALCmmdevCapture *self)
{
HRESULT hr;
void *ptr;
ResetEvent(self->NotifyEvent);
hr = IAudioClient_Start(self->client);
if(FAILED(hr))
{
ERR("Failed to start audio client: 0x%08lx\n", hr);
return hr;
}
hr = IAudioClient_GetService(self->client, &IID_IAudioCaptureClient, &ptr);
if(SUCCEEDED(hr))
{
self->capture = ptr;
ATOMIC_STORE(&self->killNow, 0, almemory_order_release);
if(althrd_create(&self->thread, ALCmmdevCapture_recordProc, self) != althrd_success)
{
ERR("Failed to start thread\n");
IAudioCaptureClient_Release(self->capture);
self->capture = NULL;
hr = E_FAIL;
}
}
if(FAILED(hr))
{
IAudioClient_Stop(self->client);
IAudioClient_Reset(self->client);
}
return hr;
}
static void ALCmmdevCapture_stop(ALCmmdevCapture *self)
{
ThreadRequest req = { self->MsgEvent, 0 };
if(PostThreadMessage(ThreadID, WM_USER_StopDevice, (WPARAM)&req, (LPARAM)STATIC_CAST(ALCmmdevProxy, self)))
(void)WaitForResponse(&req);
}
static void ALCmmdevCapture_stopProxy(ALCmmdevCapture *self)
{
int res;
if(!self->capture)
return;
ATOMIC_STORE_SEQ(&self->killNow, 1);
althrd_join(self->thread, &res);
IAudioCaptureClient_Release(self->capture);
self->capture = NULL;
IAudioClient_Stop(self->client);
IAudioClient_Reset(self->client);
}
ALuint ALCmmdevCapture_availableSamples(ALCmmdevCapture *self)
{
return (ALuint)ll_ringbuffer_read_space(self->Ring);
}
ALCenum ALCmmdevCapture_captureSamples(ALCmmdevCapture *self, ALCvoid *buffer, ALCuint samples)
{
if(ALCmmdevCapture_availableSamples(self) < samples)
return ALC_INVALID_VALUE;
ll_ringbuffer_read(self->Ring, buffer, samples);
return ALC_NO_ERROR;
}
static inline void AppendAllDevicesList2(const DevMap *entry)
{ AppendAllDevicesList(alstr_get_cstr(entry->name)); }
static inline void AppendCaptureDeviceList2(const DevMap *entry)
{ AppendCaptureDeviceList(alstr_get_cstr(entry->name)); }
typedef struct ALCmmdevBackendFactory {
DERIVE_FROM_TYPE(ALCbackendFactory);
} ALCmmdevBackendFactory;
#define ALCMMDEVBACKENDFACTORY_INITIALIZER { { GET_VTABLE2(ALCmmdevBackendFactory, ALCbackendFactory) } }
static ALCboolean ALCmmdevBackendFactory_init(ALCmmdevBackendFactory *self);
static void ALCmmdevBackendFactory_deinit(ALCmmdevBackendFactory *self);
static ALCboolean ALCmmdevBackendFactory_querySupport(ALCmmdevBackendFactory *self, ALCbackend_Type type);
static void ALCmmdevBackendFactory_probe(ALCmmdevBackendFactory *self, enum DevProbe type);
static ALCbackend* ALCmmdevBackendFactory_createBackend(ALCmmdevBackendFactory *self, ALCdevice *device, ALCbackend_Type type);
DEFINE_ALCBACKENDFACTORY_VTABLE(ALCmmdevBackendFactory);
static BOOL MMDevApiLoad(void)
{
static HRESULT InitResult;
if(!ThreadHdl)
{
ThreadRequest req;
InitResult = E_FAIL;
req.FinishedEvt = CreateEventW(NULL, FALSE, FALSE, NULL);
if(req.FinishedEvt == NULL)
ERR("Failed to create event: %lu\n", GetLastError());
else
{
ThreadHdl = CreateThread(NULL, 0, ALCmmdevProxy_messageHandler, &req, 0, &ThreadID);
if(ThreadHdl != NULL)
InitResult = WaitForResponse(&req);
CloseHandle(req.FinishedEvt);
}
}
return SUCCEEDED(InitResult);
}
static ALCboolean ALCmmdevBackendFactory_init(ALCmmdevBackendFactory* UNUSED(self))
{
VECTOR_INIT(PlaybackDevices);
VECTOR_INIT(CaptureDevices);
if(!MMDevApiLoad())
return ALC_FALSE;
return ALC_TRUE;
}
static void ALCmmdevBackendFactory_deinit(ALCmmdevBackendFactory* UNUSED(self))
{
clear_devlist(&PlaybackDevices);
VECTOR_DEINIT(PlaybackDevices);
clear_devlist(&CaptureDevices);
VECTOR_DEINIT(CaptureDevices);
if(ThreadHdl)
{
TRACE("Sending WM_QUIT to Thread %04lx\n", ThreadID);
PostThreadMessage(ThreadID, WM_QUIT, 0, 0);
CloseHandle(ThreadHdl);
ThreadHdl = NULL;
}
}
static ALCboolean ALCmmdevBackendFactory_querySupport(ALCmmdevBackendFactory* UNUSED(self), ALCbackend_Type type)
{
/* TODO: Disable capture with mmdevapi for now, since it doesn't do any
* rechanneling or resampling; if the device is configured for 48000hz
* stereo input, for example, and the app asks for 22050hz mono,
* initialization will fail.
*/
if(type == ALCbackend_Playback || type == ALCbackend_Capture)
return ALC_TRUE;
return ALC_FALSE;
}
static void ALCmmdevBackendFactory_probe(ALCmmdevBackendFactory* UNUSED(self), enum DevProbe type)
{
ThreadRequest req = { NULL, 0 };
req.FinishedEvt = CreateEventW(NULL, FALSE, FALSE, NULL);
if(req.FinishedEvt == NULL)
ERR("Failed to create event: %lu\n", GetLastError());
else
{
HRESULT hr = E_FAIL;
if(PostThreadMessage(ThreadID, WM_USER_Enumerate, (WPARAM)&req, type))
hr = WaitForResponse(&req);
if(SUCCEEDED(hr)) switch(type)
{
case ALL_DEVICE_PROBE:
VECTOR_FOR_EACH(const DevMap, PlaybackDevices, AppendAllDevicesList2);
break;
case CAPTURE_DEVICE_PROBE:
VECTOR_FOR_EACH(const DevMap, CaptureDevices, AppendCaptureDeviceList2);
break;
}
CloseHandle(req.FinishedEvt);
req.FinishedEvt = NULL;
}
}
static ALCbackend* ALCmmdevBackendFactory_createBackend(ALCmmdevBackendFactory* UNUSED(self), ALCdevice *device, ALCbackend_Type type)
{
if(type == ALCbackend_Playback)
{
ALCmmdevPlayback *backend;
NEW_OBJ(backend, ALCmmdevPlayback)(device);
if(!backend) return NULL;
return STATIC_CAST(ALCbackend, backend);
}
if(type == ALCbackend_Capture)
{
ALCmmdevCapture *backend;
NEW_OBJ(backend, ALCmmdevCapture)(device);
if(!backend) return NULL;
return STATIC_CAST(ALCbackend, backend);
}
return NULL;
}
ALCbackendFactory *ALCmmdevBackendFactory_getFactory(void)
{
static ALCmmdevBackendFactory factory = ALCMMDEVBACKENDFACTORY_INITIALIZER;
return STATIC_CAST(ALCbackendFactory, &factory);
}
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