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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"
#include "wasapi.h"
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#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 <algorithm>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <cstring>
#include <deque>
#include <functional>
#include <future>
#include <mutex>
#include <string>
#include <thread>
#include <vector>
#include "albit.h"
#include "alnumeric.h"
#include "comptr.h"
#include "core/converter.h"
#include "core/device.h"
#include "core/helpers.h"
#include "core/logging.h"
#include "ringbuffer.h"
#include "strutils.h"
#include "threads.h"
/* Some headers seem to define these as macros for __uuidof, which is annoying
* since some headers don't declare them at all. Hopefully the ifdef is enough
* to tell if they need to be declared.
*/
#ifndef KSDATAFORMAT_SUBTYPE_PCM
DEFINE_GUID(KSDATAFORMAT_SUBTYPE_PCM, 0x00000001, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
#endif
#ifndef KSDATAFORMAT_SUBTYPE_IEEE_FLOAT
DEFINE_GUID(KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, 0x00000003, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71);
#endif
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 );
namespace {
using std::chrono::milliseconds;
using std::chrono::seconds;
using ReferenceTime = std::chrono::duration<REFERENCE_TIME,std::ratio<1,10000000>>;
inline constexpr ReferenceTime operator "" _reftime(unsigned long long int n) noexcept
{ return ReferenceTime{static_cast<REFERENCE_TIME>(n)}; }
#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)
constexpr inline DWORD MaskFromTopBits(DWORD b) noexcept
{
b |= b>>1;
b |= b>>2;
b |= b>>4;
b |= b>>8;
b |= b>>16;
return b;
}
constexpr DWORD MonoMask{MaskFromTopBits(MONO)};
constexpr DWORD StereoMask{MaskFromTopBits(STEREO)};
constexpr DWORD QuadMask{MaskFromTopBits(QUAD)};
constexpr DWORD X51Mask{MaskFromTopBits(X5DOT1)};
constexpr DWORD X51RearMask{MaskFromTopBits(X5DOT1REAR)};
constexpr DWORD X61Mask{MaskFromTopBits(X6DOT1)};
constexpr DWORD X71Mask{MaskFromTopBits(X7DOT1)};
constexpr char DevNameHead[] = "OpenAL Soft on ";
constexpr size_t DevNameHeadLen{al::size(DevNameHead) - 1};
/* Scales the given reftime value, rounding the result. */
inline uint RefTime2Samples(const ReferenceTime &val, uint srate)
{
const auto retval = (val*srate + ReferenceTime{seconds{1}}/2) / seconds{1};
return static_cast<uint>(mini64(retval, std::numeric_limits<uint>::max()));
}
class GuidPrinter {
char mMsg[64];
public:
GuidPrinter(const GUID &guid)
{
std::snprintf(mMsg, al::size(mMsg), "{%08lx-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}",
DWORD{guid.Data1}, guid.Data2, guid.Data3, guid.Data4[0], guid.Data4[1], guid.Data4[2],
guid.Data4[3], guid.Data4[4], guid.Data4[5], guid.Data4[6], guid.Data4[7]);
}
const char *c_str() const { return mMsg; }
};
struct PropVariant {
PROPVARIANT mProp;
public:
PropVariant() { PropVariantInit(&mProp); }
~PropVariant() { clear(); }
void clear() { PropVariantClear(&mProp); }
PROPVARIANT* get() noexcept { return &mProp; }
PROPVARIANT& operator*() noexcept { return mProp; }
const PROPVARIANT& operator*() const noexcept { return mProp; }
PROPVARIANT* operator->() noexcept { return &mProp; }
const PROPVARIANT* operator->() const noexcept { return &mProp; }
};
struct DevMap {
std::string name;
std::string endpoint_guid; // obtained from PKEY_AudioEndpoint_GUID , set to "Unknown device GUID" if absent.
std::wstring devid;
template<typename T0, typename T1, typename T2>
DevMap(T0&& name_, T1&& guid_, T2&& devid_)
: name{std::forward<T0>(name_)}
, endpoint_guid{std::forward<T1>(guid_)}
, devid{std::forward<T2>(devid_)}
{ }
};
bool checkName(const al::vector<DevMap> &list, const std::string &name)
{
auto match_name = [&name](const DevMap &entry) -> bool
{ return entry.name == name; };
return std::find_if(list.cbegin(), list.cend(), match_name) != list.cend();
}
al::vector<DevMap> PlaybackDevices;
al::vector<DevMap> CaptureDevices;
using NameGUIDPair = std::pair<std::string,std::string>;
NameGUIDPair get_device_name_and_guid(IMMDevice *device)
{
static constexpr char UnknownName[]{"Unknown Device Name"};
static constexpr char UnknownGuid[]{"Unknown Device GUID"};
std::string name, guid;
ComPtr<IPropertyStore> ps;
HRESULT hr = device->OpenPropertyStore(STGM_READ, ps.getPtr());
if(FAILED(hr))
{
WARN("OpenPropertyStore failed: 0x%08lx\n", hr);
return std::make_pair(UnknownName, UnknownGuid);
}
PropVariant pvprop;
hr = ps->GetValue(reinterpret_cast<const PROPERTYKEY&>(DEVPKEY_Device_FriendlyName), pvprop.get());
if(FAILED(hr))
{
WARN("GetValue Device_FriendlyName failed: 0x%08lx\n", hr);
name += UnknownName;
}
else if(pvprop->vt == VT_LPWSTR)
name += wstr_to_utf8(pvprop->pwszVal);
else
{
WARN("Unexpected PROPVARIANT type: 0x%04x\n", pvprop->vt);
name += UnknownName;
}
pvprop.clear();
hr = ps->GetValue(reinterpret_cast<const PROPERTYKEY&>(PKEY_AudioEndpoint_GUID), pvprop.get());
if(FAILED(hr))
{
WARN("GetValue AudioEndpoint_GUID failed: 0x%08lx\n", hr);
guid = UnknownGuid;
}
else if(pvprop->vt == VT_LPWSTR)
guid = wstr_to_utf8(pvprop->pwszVal);
else
{
WARN("Unexpected PROPVARIANT type: 0x%04x\n", pvprop->vt);
guid = UnknownGuid;
}
return std::make_pair(std::move(name), std::move(guid));
}
EndpointFormFactor get_device_formfactor(IMMDevice *device)
{
ComPtr<IPropertyStore> ps;
HRESULT hr{device->OpenPropertyStore(STGM_READ, ps.getPtr())};
if(FAILED(hr))
{
WARN("OpenPropertyStore failed: 0x%08lx\n", hr);
return UnknownFormFactor;
}
EndpointFormFactor formfactor{UnknownFormFactor};
PropVariant pvform;
hr = ps->GetValue(PKEY_AudioEndpoint_FormFactor, pvform.get());
if(FAILED(hr))
WARN("GetValue AudioEndpoint_FormFactor failed: 0x%08lx\n", hr);
else if(pvform->vt == VT_UI4)
formfactor = static_cast<EndpointFormFactor>(pvform->ulVal);
else if(pvform->vt != VT_EMPTY)
WARN("Unexpected PROPVARIANT type: 0x%04x\n", pvform->vt);
return formfactor;
}
void add_device(IMMDevice *device, const WCHAR *devid, al::vector<DevMap> &list)
{
for(auto &entry : list)
{
if(entry.devid == devid)
return;
}
auto name_guid = get_device_name_and_guid(device);
int count{1};
std::string newname{name_guid.first};
while(checkName(list, newname))
{
newname = name_guid.first;
newname += " #";
newname += std::to_string(++count);
}
list.emplace_back(std::move(newname), std::move(name_guid.second), devid);
const DevMap &newentry = list.back();
TRACE("Got device \"%s\", \"%s\", \"%ls\"\n", newentry.name.c_str(),
newentry.endpoint_guid.c_str(), newentry.devid.c_str());
}
WCHAR *get_device_id(IMMDevice *device)
{
WCHAR *devid;
const HRESULT hr{device->GetId(&devid)};
if(FAILED(hr))
{
ERR("Failed to get device id: %lx\n", hr);
return nullptr;
}
return devid;
}
void probe_devices(IMMDeviceEnumerator *devenum, EDataFlow flowdir, al::vector<DevMap> &list)
{
al::vector<DevMap>{}.swap(list);
ComPtr<IMMDeviceCollection> coll;
HRESULT hr{devenum->EnumAudioEndpoints(flowdir, DEVICE_STATE_ACTIVE, coll.getPtr())};
if(FAILED(hr))
{
ERR("Failed to enumerate audio endpoints: 0x%08lx\n", hr);
return;
}
UINT count{0};
hr = coll->GetCount(&count);
if(SUCCEEDED(hr) && count > 0)
list.reserve(count);
ComPtr<IMMDevice> device;
hr = devenum->GetDefaultAudioEndpoint(flowdir, eMultimedia, device.getPtr());
if(SUCCEEDED(hr))
{
if(WCHAR *devid{get_device_id(device.get())})
{
add_device(device.get(), devid, list);
CoTaskMemFree(devid);
}
device = nullptr;
}
for(UINT i{0};i < count;++i)
{
hr = coll->Item(i, device.getPtr());
if(FAILED(hr)) continue;
if(WCHAR *devid{get_device_id(device.get())})
{
add_device(device.get(), devid, list);
CoTaskMemFree(devid);
}
device = nullptr;
}
}
bool MakeExtensible(WAVEFORMATEXTENSIBLE *out, const WAVEFORMATEX *in)
{
*out = WAVEFORMATEXTENSIBLE{};
if(in->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
{
*out = *CONTAINING_RECORD(in, const WAVEFORMATEXTENSIBLE, Format);
out->Format.cbSize = sizeof(*out) - sizeof(out->Format);
}
else if(in->wFormatTag == WAVE_FORMAT_PCM)
{
out->Format = *in;
out->Format.cbSize = 0;
out->Samples.wValidBitsPerSample = out->Format.wBitsPerSample;
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.cbSize = 0;
out->Samples.wValidBitsPerSample = out->Format.wBitsPerSample;
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 false;
}
return true;
}
void TraceFormat(const char *msg, const WAVEFORMATEX *format)
{
constexpr size_t fmtex_extra_size{sizeof(WAVEFORMATEXTENSIBLE)-sizeof(WAVEFORMATEX)};
if(format->wFormatTag == WAVE_FORMAT_EXTENSIBLE && format->cbSize >= fmtex_extra_size)
{
const WAVEFORMATEXTENSIBLE *fmtex{
CONTAINING_RECORD(format, const WAVEFORMATEXTENSIBLE, Format)};
TRACE("%s:\n"
" FormatTag = 0x%04x\n"
" Channels = %d\n"
" SamplesPerSec = %lu\n"
" AvgBytesPerSec = %lu\n"
" BlockAlign = %d\n"
" BitsPerSample = %d\n"
" Size = %d\n"
" Samples = %d\n"
" ChannelMask = 0x%lx\n"
" SubFormat = %s\n",
msg, fmtex->Format.wFormatTag, fmtex->Format.nChannels, fmtex->Format.nSamplesPerSec,
fmtex->Format.nAvgBytesPerSec, fmtex->Format.nBlockAlign, fmtex->Format.wBitsPerSample,
fmtex->Format.cbSize, fmtex->Samples.wReserved, fmtex->dwChannelMask,
GuidPrinter{fmtex->SubFormat}.c_str());
}
else
TRACE("%s:\n"
" FormatTag = 0x%04x\n"
" Channels = %d\n"
" SamplesPerSec = %lu\n"
" AvgBytesPerSec = %lu\n"
" BlockAlign = %d\n"
" BitsPerSample = %d\n"
" Size = %d\n",
msg, format->wFormatTag, format->nChannels, format->nSamplesPerSec,
format->nAvgBytesPerSec, format->nBlockAlign, format->wBitsPerSample, format->cbSize);
}
enum class MsgType {
OpenDevice,
ReopenDevice,
ResetDevice,
StartDevice,
StopDevice,
CloseDevice,
EnumeratePlayback,
EnumerateCapture,
Count,
QuitThread = Count
};
constexpr char MessageStr[static_cast<size_t>(MsgType::Count)][20]{
"Open Device",
"Reopen Device",
"Reset Device",
"Start Device",
"Stop Device",
"Close Device",
"Enumerate Playback",
"Enumerate Capture"
};
/* Proxy interface used by the message handler. */
struct WasapiProxy {
virtual ~WasapiProxy() = default;
virtual HRESULT openProxy(const char *name) = 0;
virtual void closeProxy() = 0;
virtual HRESULT resetProxy() = 0;
virtual HRESULT startProxy() = 0;
virtual void stopProxy() = 0;
struct Msg {
MsgType mType;
WasapiProxy *mProxy;
const char *mParam;
std::promise<HRESULT> mPromise;
explicit operator bool() const noexcept { return mType != MsgType::QuitThread; }
};
static std::deque<Msg> mMsgQueue;
static std::mutex mMsgQueueLock;
static std::condition_variable mMsgQueueCond;
std::future<HRESULT> pushMessage(MsgType type, const char *param=nullptr)
{
std::promise<HRESULT> promise;
std::future<HRESULT> future{promise.get_future()};
{
std::lock_guard<std::mutex> _{mMsgQueueLock};
mMsgQueue.emplace_back(Msg{type, this, param, std::move(promise)});
}
mMsgQueueCond.notify_one();
return future;
}
static std::future<HRESULT> pushMessageStatic(MsgType type)
{
std::promise<HRESULT> promise;
std::future<HRESULT> future{promise.get_future()};
{
std::lock_guard<std::mutex> _{mMsgQueueLock};
mMsgQueue.emplace_back(Msg{type, nullptr, nullptr, std::move(promise)});
}
mMsgQueueCond.notify_one();
return future;
}
static Msg popMessage()
{
std::unique_lock<std::mutex> lock{mMsgQueueLock};
mMsgQueueCond.wait(lock, []{return !mMsgQueue.empty();});
Msg msg{std::move(mMsgQueue.front())};
mMsgQueue.pop_front();
return msg;
}
static int messageHandler(std::promise<HRESULT> *promise);
};
std::deque<WasapiProxy::Msg> WasapiProxy::mMsgQueue;
std::mutex WasapiProxy::mMsgQueueLock;
std::condition_variable WasapiProxy::mMsgQueueCond;
int WasapiProxy::messageHandler(std::promise<HRESULT> *promise)
{
TRACE("Starting message thread\n");
HRESULT cohr{CoInitializeEx(nullptr, COINIT_MULTITHREADED)};
if(FAILED(cohr))
{
WARN("Failed to initialize COM: 0x%08lx\n", cohr);
promise->set_value(cohr);
return 0;
}
void *ptr{};
HRESULT hr{CoCreateInstance(CLSID_MMDeviceEnumerator, nullptr, CLSCTX_INPROC_SERVER,
IID_IMMDeviceEnumerator, &ptr)};
if(FAILED(hr))
{
WARN("Failed to create IMMDeviceEnumerator instance: 0x%08lx\n", hr);
promise->set_value(hr);
CoUninitialize();
return 0;
}
static_cast<IMMDeviceEnumerator*>(ptr)->Release();
CoUninitialize();
TRACE("Message thread initialization complete\n");
promise->set_value(S_OK);
promise = nullptr;
TRACE("Starting message loop\n");
uint deviceCount{0};
while(Msg msg{popMessage()})
{
TRACE("Got message \"%s\" (0x%04x, this=%p, param=%p)\n",
MessageStr[static_cast<size_t>(msg.mType)], static_cast<uint>(msg.mType),
static_cast<void*>(msg.mProxy), static_cast<const void*>(msg.mParam));
switch(msg.mType)
{
case MsgType::OpenDevice:
hr = cohr = S_OK;
if(++deviceCount == 1)
hr = cohr = CoInitializeEx(nullptr, COINIT_MULTITHREADED);
if(SUCCEEDED(hr))
hr = msg.mProxy->openProxy(msg.mParam);
msg.mPromise.set_value(hr);
if(FAILED(hr))
{
if(--deviceCount == 0 && SUCCEEDED(cohr))
CoUninitialize();
}
continue;
case MsgType::ReopenDevice:
hr = msg.mProxy->openProxy(msg.mParam);
msg.mPromise.set_value(hr);
continue;
case MsgType::ResetDevice:
hr = msg.mProxy->resetProxy();
msg.mPromise.set_value(hr);
continue;
case MsgType::StartDevice:
hr = msg.mProxy->startProxy();
msg.mPromise.set_value(hr);
continue;
case MsgType::StopDevice:
msg.mProxy->stopProxy();
msg.mPromise.set_value(S_OK);
continue;
case MsgType::CloseDevice:
msg.mProxy->closeProxy();
msg.mPromise.set_value(S_OK);
if(--deviceCount == 0)
CoUninitialize();
continue;
case MsgType::EnumeratePlayback:
case MsgType::EnumerateCapture:
hr = cohr = S_OK;
if(++deviceCount == 1)
hr = cohr = CoInitializeEx(nullptr, COINIT_MULTITHREADED);
if(SUCCEEDED(hr))
hr = CoCreateInstance(CLSID_MMDeviceEnumerator, nullptr, CLSCTX_INPROC_SERVER,
IID_IMMDeviceEnumerator, &ptr);
if(FAILED(hr))
msg.mPromise.set_value(hr);
else
{
ComPtr<IMMDeviceEnumerator> enumerator{static_cast<IMMDeviceEnumerator*>(ptr)};
if(msg.mType == MsgType::EnumeratePlayback)
probe_devices(enumerator.get(), eRender, PlaybackDevices);
else if(msg.mType == MsgType::EnumerateCapture)
probe_devices(enumerator.get(), eCapture, CaptureDevices);
msg.mPromise.set_value(S_OK);
}
if(--deviceCount == 0 && SUCCEEDED(cohr))
CoUninitialize();
continue;
case MsgType::QuitThread:
break;
}
ERR("Unexpected message: %u\n", static_cast<uint>(msg.mType));
msg.mPromise.set_value(E_FAIL);
}
TRACE("Message loop finished\n");
return 0;
}
struct WasapiPlayback final : public BackendBase, WasapiProxy {
WasapiPlayback(DeviceBase *device) noexcept : BackendBase{device} { }
~WasapiPlayback() override;
int mixerProc();
void open(const char *name) override;
HRESULT openProxy(const char *name) override;
void closeProxy() override;
bool reset() override;
HRESULT resetProxy() override;
void start() override;
HRESULT startProxy() override;
void stop() override;
void stopProxy() override;
ClockLatency getClockLatency() override;
HRESULT mOpenStatus{E_FAIL};
ComPtr<IMMDevice> mMMDev{nullptr};
ComPtr<IAudioClient> mClient{nullptr};
ComPtr<IAudioRenderClient> mRender{nullptr};
HANDLE mNotifyEvent{nullptr};
UINT32 mFrameStep{0u};
std::atomic<UINT32> mPadding{0u};
std::mutex mMutex;
std::atomic<bool> mKillNow{true};
std::thread mThread;
DEF_NEWDEL(WasapiPlayback)
};
WasapiPlayback::~WasapiPlayback()
{
if(SUCCEEDED(mOpenStatus))
pushMessage(MsgType::CloseDevice).wait();
mOpenStatus = E_FAIL;
if(mNotifyEvent != nullptr)
CloseHandle(mNotifyEvent);
mNotifyEvent = nullptr;
}
FORCE_ALIGN int WasapiPlayback::mixerProc()
{
HRESULT hr{CoInitializeEx(nullptr, COINIT_MULTITHREADED)};
if(FAILED(hr))
{
ERR("CoInitializeEx(nullptr, COINIT_MULTITHREADED) failed: 0x%08lx\n", hr);
mDevice->handleDisconnect("COM init failed: 0x%08lx", hr);
return 1;
}
SetRTPriority();
althrd_setname(MIXER_THREAD_NAME);
const uint update_size{mDevice->UpdateSize};
const UINT32 buffer_len{mDevice->BufferSize};
while(!mKillNow.load(std::memory_order_relaxed))
{
UINT32 written;
hr = mClient->GetCurrentPadding(&written);
if(FAILED(hr))
{
ERR("Failed to get padding: 0x%08lx\n", hr);
mDevice->handleDisconnect("Failed to retrieve buffer padding: 0x%08lx", hr);
break;
}
mPadding.store(written, std::memory_order_relaxed);
uint len{buffer_len - written};
if(len < update_size)
{
DWORD res{WaitForSingleObjectEx(mNotifyEvent, 2000, FALSE)};
if(res != WAIT_OBJECT_0)
ERR("WaitForSingleObjectEx error: 0x%lx\n", res);
continue;
}
BYTE *buffer;
hr = mRender->GetBuffer(len, &buffer);
if(SUCCEEDED(hr))
{
{
std::lock_guard<std::mutex> _{mMutex};
mDevice->renderSamples(buffer, len, mFrameStep);
mPadding.store(written + len, std::memory_order_relaxed);
}
hr = mRender->ReleaseBuffer(len, 0);
}
if(FAILED(hr))
{
ERR("Failed to buffer data: 0x%08lx\n", hr);
mDevice->handleDisconnect("Failed to send playback samples: 0x%08lx", hr);
break;
}
}
mPadding.store(0u, std::memory_order_release);
CoUninitialize();
return 0;
}
void WasapiPlayback::open(const char *name)
{
HRESULT hr{S_OK};
if(!mNotifyEvent)
{
mNotifyEvent = CreateEventW(nullptr, FALSE, FALSE, nullptr);
if(mNotifyEvent == nullptr)
{
ERR("Failed to create notify events: %lu\n", GetLastError());
hr = E_FAIL;
}
}
if(SUCCEEDED(hr))
{
if(name)
{
if(PlaybackDevices.empty())
pushMessage(MsgType::EnumeratePlayback);
if(std::strncmp(name, DevNameHead, DevNameHeadLen) == 0)
{
name += DevNameHeadLen;
if(*name == '\0')
name = nullptr;
}
}
if(SUCCEEDED(mOpenStatus))
hr = pushMessage(MsgType::ReopenDevice, name).get();
else
{
hr = pushMessage(MsgType::OpenDevice, name).get();
mOpenStatus = hr;
}
}
if(FAILED(hr))
throw al::backend_exception{al::backend_error::DeviceError, "Device init failed: 0x%08lx",
hr};
}
HRESULT WasapiPlayback::openProxy(const char *name)
{
const wchar_t *devid{nullptr};
if(name)
{
auto iter = std::find_if(PlaybackDevices.cbegin(), PlaybackDevices.cend(),
[name](const DevMap &entry) -> bool
{ return entry.name == name || entry.endpoint_guid == name; });
if(iter == PlaybackDevices.cend())
{
const std::wstring wname{utf8_to_wstr(name)};
iter = std::find_if(PlaybackDevices.cbegin(), PlaybackDevices.cend(),
[&wname](const DevMap &entry) -> bool
{ return entry.devid == wname; });
}
if(iter == PlaybackDevices.cend())
{
WARN("Failed to find device name matching \"%s\"\n", name);
return E_FAIL;
}
name = iter->name.c_str();
devid = iter->devid.c_str();
}
void *ptr;
ComPtr<IMMDevice> mmdev;
HRESULT hr{CoCreateInstance(CLSID_MMDeviceEnumerator, nullptr, CLSCTX_INPROC_SERVER,
IID_IMMDeviceEnumerator, &ptr)};
if(SUCCEEDED(hr))
{
ComPtr<IMMDeviceEnumerator> enumerator{static_cast<IMMDeviceEnumerator*>(ptr)};
if(!devid)
hr = enumerator->GetDefaultAudioEndpoint(eRender, eMultimedia, mmdev.getPtr());
else
hr = enumerator->GetDevice(devid, mmdev.getPtr());
}
if(FAILED(hr))
{
WARN("Failed to open device \"%s\"\n", name?name:"(default)");
return hr;
}
mClient = nullptr;
mMMDev = std::move(mmdev);
if(name) mDevice->DeviceName = std::string{DevNameHead} + name;
else mDevice->DeviceName = DevNameHead + get_device_name_and_guid(mMMDev.get()).first;
return hr;
}
void WasapiPlayback::closeProxy()
{
mClient = nullptr;
mMMDev = nullptr;
}
bool WasapiPlayback::reset()
{
HRESULT hr{pushMessage(MsgType::ResetDevice).get()};
if(FAILED(hr))
throw al::backend_exception{al::backend_error::DeviceError, "0x%08lx", hr};
return true;
}
HRESULT WasapiPlayback::resetProxy()
{
mClient = nullptr;
void *ptr;
HRESULT hr{mMMDev->Activate(IID_IAudioClient, CLSCTX_INPROC_SERVER, nullptr, &ptr)};
if(FAILED(hr))
{
ERR("Failed to reactivate audio client: 0x%08lx\n", hr);
return hr;
}
mClient = ComPtr<IAudioClient>{static_cast<IAudioClient*>(ptr)};
WAVEFORMATEX *wfx;
hr = mClient->GetMixFormat(&wfx);
if(FAILED(hr))
{
ERR("Failed to get mix format: 0x%08lx\n", hr);
return hr;
}
TraceFormat("Device mix format", wfx);
WAVEFORMATEXTENSIBLE OutputType;
if(!MakeExtensible(&OutputType, wfx))
{
CoTaskMemFree(wfx);
return E_FAIL;
}
CoTaskMemFree(wfx);
wfx = nullptr;
const ReferenceTime per_time{ReferenceTime{seconds{mDevice->UpdateSize}} / mDevice->Frequency};
const ReferenceTime buf_time{ReferenceTime{seconds{mDevice->BufferSize}} / mDevice->Frequency};
bool isRear51{false};
if(!mDevice->Flags.test(FrequencyRequest))
mDevice->Frequency = OutputType.Format.nSamplesPerSec;
if(!mDevice->Flags.test(ChannelsRequest))
{
/* If not requesting a channel configuration, auto-select given what
* fits the mask's lsb (to ensure no gaps in the output channels). If
* there's no mask, we can only assume mono or stereo.
*/
const uint32_t chancount{OutputType.Format.nChannels};
const DWORD chanmask{OutputType.dwChannelMask};
if(chancount >= 8 && (chanmask&X71Mask) == X7DOT1)
mDevice->FmtChans = DevFmtX71;
else if(chancount >= 7 && (chanmask&X61Mask) == X6DOT1)
mDevice->FmtChans = DevFmtX61;
else if(chancount >= 6 && (chanmask&X51Mask) == X5DOT1)
mDevice->FmtChans = DevFmtX51;
else if(chancount >= 6 && (chanmask&X51RearMask) == X5DOT1REAR)
{
mDevice->FmtChans = DevFmtX51;
isRear51 = true;
}
else if(chancount >= 4 && (chanmask&QuadMask) == QUAD)
mDevice->FmtChans = DevFmtQuad;
else if(chancount >= 2 && ((chanmask&StereoMask) == STEREO || !chanmask))
mDevice->FmtChans = DevFmtStereo;
else if(chancount >= 1 && ((chanmask&MonoMask) == MONO || !chanmask))
mDevice->FmtChans = DevFmtMono;
else
ERR("Unhandled channel config: %d -- 0x%08lx\n", chancount, chanmask);
}
else
{
const uint32_t chancount{OutputType.Format.nChannels};
const DWORD chanmask{OutputType.dwChannelMask};
isRear51 = (chancount == 6 && (chanmask&X51RearMask) == X5DOT1REAR);
}
OutputType.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
switch(mDevice->FmtChans)
{
case DevFmtMono:
OutputType.Format.nChannels = 1;
OutputType.dwChannelMask = MONO;
break;
case DevFmtAmbi3D:
mDevice->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 = isRear51 ? X5DOT1REAR : X5DOT1;
break;
case DevFmtX61:
OutputType.Format.nChannels = 7;
OutputType.dwChannelMask = X6DOT1;
break;
case DevFmtX71:
case DevFmtX3D71:
OutputType.Format.nChannels = 8;
OutputType.dwChannelMask = X7DOT1;
break;
}
switch(mDevice->FmtType)
{
case DevFmtByte:
mDevice->FmtType = DevFmtUByte;
/* fall-through */
case DevFmtUByte:
OutputType.Format.wBitsPerSample = 8;
OutputType.Samples.wValidBitsPerSample = 8;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtUShort:
mDevice->FmtType = DevFmtShort;
/* fall-through */
case DevFmtShort:
OutputType.Format.wBitsPerSample = 16;
OutputType.Samples.wValidBitsPerSample = 16;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtUInt:
mDevice->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 = mDevice->Frequency;
OutputType.Format.nBlockAlign = static_cast<WORD>(OutputType.Format.nChannels *
OutputType.Format.wBitsPerSample / 8);
OutputType.Format.nAvgBytesPerSec = OutputType.Format.nSamplesPerSec *
OutputType.Format.nBlockAlign;
TraceFormat("Requesting playback format", &OutputType.Format);
hr = mClient->IsFormatSupported(AUDCLNT_SHAREMODE_SHARED, &OutputType.Format, &wfx);
if(FAILED(hr))
{
ERR("Failed to check format support: 0x%08lx\n", hr);
hr = mClient->GetMixFormat(&wfx);
}
if(FAILED(hr))
{
ERR("Failed to find a supported format: 0x%08lx\n", hr);
return hr;
}
if(wfx != nullptr)
{
TraceFormat("Got playback format", wfx);
if(!MakeExtensible(&OutputType, wfx))
{
CoTaskMemFree(wfx);
return E_FAIL;
}
CoTaskMemFree(wfx);
wfx = nullptr;
mDevice->Frequency = OutputType.Format.nSamplesPerSec;
const uint32_t chancount{OutputType.Format.nChannels};
const DWORD chanmask{OutputType.dwChannelMask};
/* Don't update the channel format if the requested format fits what's
* supported.
*/
bool chansok{false};
if(mDevice->Flags.test(ChannelsRequest))
{
/* When requesting a channel configuration, make sure it fits the
* mask's lsb (to ensure no gaps in the output channels). If
* there's no mask, assume the request fits with enough channels.
*/
switch(mDevice->FmtChans)
{
case DevFmtMono:
chansok = (chancount >= 1 && ((chanmask&MonoMask) == MONO || !chanmask));
break;
case DevFmtStereo:
chansok = (chancount >= 2 && ((chanmask&StereoMask) == STEREO || !chanmask));
break;
case DevFmtQuad:
chansok = (chancount >= 4 && ((chanmask&QuadMask) == QUAD || !chanmask));
break;
case DevFmtX51:
chansok = (chancount >= 6 && ((chanmask&X51Mask) == X5DOT1
|| (chanmask&X51RearMask) == X5DOT1REAR || !chanmask));
break;
case DevFmtX61:
chansok = (chancount >= 7 && ((chanmask&X61Mask) == X6DOT1 || !chanmask));
break;
case DevFmtX71:
case DevFmtX3D71:
chansok = (chancount >= 8 && ((chanmask&X71Mask) == X7DOT1 || !chanmask));
break;
case DevFmtAmbi3D:
break;
}
}
if(!chansok)
{
if(chancount >= 8 && (chanmask&X71Mask) == X7DOT1)
mDevice->FmtChans = DevFmtX71;
else if(chancount >= 7 && (chanmask&X61Mask) == X6DOT1)
mDevice->FmtChans = DevFmtX61;
else if(chancount >= 6 && ((chanmask&X51Mask) == X5DOT1
|| (chanmask&X51RearMask) == X5DOT1REAR))
mDevice->FmtChans = DevFmtX51;
else if(chancount >= 4 && (chanmask&QuadMask) == QUAD)
mDevice->FmtChans = DevFmtQuad;
else if(chancount >= 2 && ((chanmask&StereoMask) == STEREO || !chanmask))
mDevice->FmtChans = DevFmtStereo;
else if(chancount >= 1 && ((chanmask&MonoMask) == MONO || !chanmask))
mDevice->FmtChans = DevFmtMono;
else
{
ERR("Unhandled extensible channels: %d -- 0x%08lx\n", OutputType.Format.nChannels,
OutputType.dwChannelMask);
mDevice->FmtChans = DevFmtStereo;
OutputType.Format.nChannels = 2;
OutputType.dwChannelMask = STEREO;
}
}
if(IsEqualGUID(OutputType.SubFormat, KSDATAFORMAT_SUBTYPE_PCM))
{
if(OutputType.Format.wBitsPerSample == 8)
mDevice->FmtType = DevFmtUByte;
else if(OutputType.Format.wBitsPerSample == 16)
mDevice->FmtType = DevFmtShort;
else if(OutputType.Format.wBitsPerSample == 32)
mDevice->FmtType = DevFmtInt;
else
{
mDevice->FmtType = DevFmtShort;
OutputType.Format.wBitsPerSample = 16;
}
}
else if(IsEqualGUID(OutputType.SubFormat, KSDATAFORMAT_SUBTYPE_IEEE_FLOAT))
{
mDevice->FmtType = DevFmtFloat;
OutputType.Format.wBitsPerSample = 32;
}
else
{
ERR("Unhandled format sub-type: %s\n", GuidPrinter{OutputType.SubFormat}.c_str());
mDevice->FmtType = DevFmtShort;
if(OutputType.Format.wFormatTag != WAVE_FORMAT_EXTENSIBLE)
OutputType.Format.wFormatTag = WAVE_FORMAT_PCM;
OutputType.Format.wBitsPerSample = 16;
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
}
OutputType.Samples.wValidBitsPerSample = OutputType.Format.wBitsPerSample;
}
mFrameStep = OutputType.Format.nChannels;
const EndpointFormFactor formfactor{get_device_formfactor(mMMDev.get())};
mDevice->Flags.set(DirectEar, (formfactor == Headphones || formfactor == Headset));
setDefaultWFXChannelOrder();
hr = mClient->Initialize(AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
buf_time.count(), 0, &OutputType.Format, nullptr);
if(FAILED(hr))
{
ERR("Failed to initialize audio client: 0x%08lx\n", hr);
return hr;
}
UINT32 buffer_len{};
ReferenceTime min_per{};
hr = mClient->GetDevicePeriod(&reinterpret_cast<REFERENCE_TIME&>(min_per), nullptr);
if(SUCCEEDED(hr))
hr = mClient->GetBufferSize(&buffer_len);
if(FAILED(hr))
{
ERR("Failed to get audio buffer info: 0x%08lx\n", hr);
return hr;
}
/* Find the nearest multiple of the period size to the update size */
if(min_per < per_time)
min_per *= maxi64((per_time + min_per/2) / min_per, 1);
mDevice->UpdateSize = minu(RefTime2Samples(min_per, mDevice->Frequency), buffer_len/2);
mDevice->BufferSize = buffer_len;
hr = mClient->SetEventHandle(mNotifyEvent);
if(FAILED(hr))
{
ERR("Failed to set event handle: 0x%08lx\n", hr);
return hr;
}
return hr;
}
void WasapiPlayback::start()
{
const HRESULT hr{pushMessage(MsgType::StartDevice).get()};
if(FAILED(hr))
throw al::backend_exception{al::backend_error::DeviceError,
"Failed to start playback: 0x%lx", hr};
}
HRESULT WasapiPlayback::startProxy()
{
ResetEvent(mNotifyEvent);
HRESULT hr{mClient->Start()};
if(FAILED(hr))
{
ERR("Failed to start audio client: 0x%08lx\n", hr);
return hr;
}
void *ptr;
hr = mClient->GetService(IID_IAudioRenderClient, &ptr);
if(SUCCEEDED(hr))
{
mRender = ComPtr<IAudioRenderClient>{static_cast<IAudioRenderClient*>(ptr)};
try {
mKillNow.store(false, std::memory_order_release);
mThread = std::thread{std::mem_fn(&WasapiPlayback::mixerProc), this};
}
catch(...) {
mRender = nullptr;
ERR("Failed to start thread\n");
hr = E_FAIL;
}
}
if(FAILED(hr))
mClient->Stop();
return hr;
}
void WasapiPlayback::stop()
{ pushMessage(MsgType::StopDevice).wait(); }
void WasapiPlayback::stopProxy()
{
if(!mRender || !mThread.joinable())
return;
mKillNow.store(true, std::memory_order_release);
mThread.join();
mRender = nullptr;
mClient->Stop();
}
ClockLatency WasapiPlayback::getClockLatency()
{
ClockLatency ret;
std::lock_guard<std::mutex> _{mMutex};
ret.ClockTime = GetDeviceClockTime(mDevice);
ret.Latency = std::chrono::seconds{mPadding.load(std::memory_order_relaxed)};
ret.Latency /= mDevice->Frequency;
return ret;
}
struct WasapiCapture final : public BackendBase, WasapiProxy {
WasapiCapture(DeviceBase *device) noexcept : BackendBase{device} { }
~WasapiCapture() override;
int recordProc();
void open(const char *name) override;
HRESULT openProxy(const char *name) override;
void closeProxy() override;
HRESULT resetProxy() override;
void start() override;
HRESULT startProxy() override;
void stop() override;
void stopProxy() override;
void captureSamples(al::byte *buffer, uint samples) override;
uint availableSamples() override;
HRESULT mOpenStatus{E_FAIL};
ComPtr<IMMDevice> mMMDev{nullptr};
ComPtr<IAudioClient> mClient{nullptr};
ComPtr<IAudioCaptureClient> mCapture{nullptr};
HANDLE mNotifyEvent{nullptr};
ChannelConverter mChannelConv{};
SampleConverterPtr mSampleConv;
RingBufferPtr mRing;
std::atomic<bool> mKillNow{true};
std::thread mThread;
DEF_NEWDEL(WasapiCapture)
};
WasapiCapture::~WasapiCapture()
{
if(SUCCEEDED(mOpenStatus))
pushMessage(MsgType::CloseDevice).wait();
mOpenStatus = E_FAIL;
if(mNotifyEvent != nullptr)
CloseHandle(mNotifyEvent);
mNotifyEvent = nullptr;
}
FORCE_ALIGN int WasapiCapture::recordProc()
{
HRESULT hr{CoInitializeEx(nullptr, COINIT_MULTITHREADED)};
if(FAILED(hr))
{
ERR("CoInitializeEx(nullptr, COINIT_MULTITHREADED) failed: 0x%08lx\n", hr);
mDevice->handleDisconnect("COM init failed: 0x%08lx", hr);
return 1;
}
althrd_setname(RECORD_THREAD_NAME);
al::vector<float> samples;
while(!mKillNow.load(std::memory_order_relaxed))
{
UINT32 avail;
hr = mCapture->GetNextPacketSize(&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 = mCapture->GetBuffer(&rdata, &numsamples, &flags, nullptr, nullptr);
if(FAILED(hr))
ERR("Failed to get capture buffer: 0x%08lx\n", hr);
else
{
if(mChannelConv.is_active())
{
samples.resize(numsamples*2);
mChannelConv.convert(rdata, samples.data(), numsamples);
rdata = reinterpret_cast<BYTE*>(samples.data());
}
auto data = mRing->getWriteVector();
size_t dstframes;
if(mSampleConv)
{
const void *srcdata{rdata};
uint srcframes{numsamples};
dstframes = mSampleConv->convert(&srcdata, &srcframes, data.first.buf,
static_cast<uint>(minz(data.first.len, INT_MAX)));
if(srcframes > 0 && dstframes == data.first.len && data.second.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 += mSampleConv->convert(&srcdata, &srcframes, data.second.buf,
static_cast<uint>(minz(data.second.len, INT_MAX)));
}
}
else
{
const uint framesize{mDevice->frameSizeFromFmt()};
size_t len1{minz(data.first.len, numsamples)};
size_t len2{minz(data.second.len, numsamples-len1)};
memcpy(data.first.buf, rdata, len1*framesize);
if(len2 > 0)
memcpy(data.second.buf, rdata+len1*framesize, len2*framesize);
dstframes = len1 + len2;
}
mRing->writeAdvance(dstframes);
hr = mCapture->ReleaseBuffer(numsamples);
if(FAILED(hr)) ERR("Failed to release capture buffer: 0x%08lx\n", hr);
}
}
if(FAILED(hr))
{
mDevice->handleDisconnect("Failed to capture samples: 0x%08lx", hr);
break;
}
DWORD res{WaitForSingleObjectEx(mNotifyEvent, 2000, FALSE)};
if(res != WAIT_OBJECT_0)
ERR("WaitForSingleObjectEx error: 0x%lx\n", res);
}
CoUninitialize();
return 0;
}
void WasapiCapture::open(const char *name)
{
HRESULT hr{S_OK};
mNotifyEvent = CreateEventW(nullptr, FALSE, FALSE, nullptr);
if(mNotifyEvent == nullptr)
{
ERR("Failed to create notify event: %lu\n", GetLastError());
hr = E_FAIL;
}
if(SUCCEEDED(hr))
{
if(name)
{
if(CaptureDevices.empty())
pushMessage(MsgType::EnumerateCapture);
if(std::strncmp(name, DevNameHead, DevNameHeadLen) == 0)
{
name += DevNameHeadLen;
if(*name == '\0')
name = nullptr;
}
}
hr = pushMessage(MsgType::OpenDevice, name).get();
}
mOpenStatus = hr;
if(FAILED(hr))
throw al::backend_exception{al::backend_error::DeviceError, "Device init failed: 0x%08lx",
hr};
hr = pushMessage(MsgType::ResetDevice).get();
if(FAILED(hr))
{
if(hr == E_OUTOFMEMORY)
throw al::backend_exception{al::backend_error::OutOfMemory, "Out of memory"};
throw al::backend_exception{al::backend_error::DeviceError, "Device reset failed"};
}
}
HRESULT WasapiCapture::openProxy(const char *name)
{
const wchar_t *devid{nullptr};
if(name)
{
auto iter = std::find_if(CaptureDevices.cbegin(), CaptureDevices.cend(),
[name](const DevMap &entry) -> bool
{ return entry.name == name || entry.endpoint_guid == name; });
if(iter == CaptureDevices.cend())
{
const std::wstring wname{utf8_to_wstr(name)};
iter = std::find_if(CaptureDevices.cbegin(), CaptureDevices.cend(),
[&wname](const DevMap &entry) -> bool
{ return entry.devid == wname; });
}
if(iter == CaptureDevices.cend())
{
WARN("Failed to find device name matching \"%s\"\n", name);
return E_FAIL;
}
name = iter->name.c_str();
devid = iter->devid.c_str();
}
void *ptr;
HRESULT hr{CoCreateInstance(CLSID_MMDeviceEnumerator, nullptr, CLSCTX_INPROC_SERVER,
IID_IMMDeviceEnumerator, &ptr)};
if(SUCCEEDED(hr))
{
ComPtr<IMMDeviceEnumerator> enumerator{static_cast<IMMDeviceEnumerator*>(ptr)};
if(!devid)
hr = enumerator->GetDefaultAudioEndpoint(eCapture, eMultimedia, mMMDev.getPtr());
else
hr = enumerator->GetDevice(devid, mMMDev.getPtr());
}
if(FAILED(hr))
{
WARN("Failed to open device \"%s\"\n", name?name:"(default)");
return hr;
}
mClient = nullptr;
if(name) mDevice->DeviceName = std::string{DevNameHead} + name;
else mDevice->DeviceName = DevNameHead + get_device_name_and_guid(mMMDev.get()).first;
return hr;
}
void WasapiCapture::closeProxy()
{
mClient = nullptr;
mMMDev = nullptr;
}
HRESULT WasapiCapture::resetProxy()
{
mClient = nullptr;
void *ptr;
HRESULT hr{mMMDev->Activate(IID_IAudioClient, CLSCTX_INPROC_SERVER, nullptr, &ptr)};
if(FAILED(hr))
{
ERR("Failed to reactivate audio client: 0x%08lx\n", hr);
return hr;
}
mClient = ComPtr<IAudioClient>{static_cast<IAudioClient*>(ptr)};
WAVEFORMATEX *wfx;
hr = mClient->GetMixFormat(&wfx);
if(FAILED(hr))
{
ERR("Failed to get capture format: 0x%08lx\n", hr);
return hr;
}
TraceFormat("Device capture format", wfx);
WAVEFORMATEXTENSIBLE InputType{};
if(!MakeExtensible(&InputType, wfx))
{
CoTaskMemFree(wfx);
return E_FAIL;
}
CoTaskMemFree(wfx);
wfx = nullptr;
const bool isRear51{InputType.Format.nChannels == 6
&& (InputType.dwChannelMask&X51RearMask) == X5DOT1REAR};
// Make sure buffer is at least 100ms in size
ReferenceTime buf_time{ReferenceTime{seconds{mDevice->BufferSize}} / mDevice->Frequency};
buf_time = std::max(buf_time, ReferenceTime{milliseconds{100}});
InputType = {};
InputType.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
switch(mDevice->FmtChans)
{
case DevFmtMono:
InputType.Format.nChannels = 1;
InputType.dwChannelMask = MONO;
break;
case DevFmtStereo:
InputType.Format.nChannels = 2;
InputType.dwChannelMask = STEREO;
break;
case DevFmtQuad:
InputType.Format.nChannels = 4;
InputType.dwChannelMask = QUAD;
break;
case DevFmtX51:
InputType.Format.nChannels = 6;
InputType.dwChannelMask = isRear51 ? X5DOT1REAR : X5DOT1;
break;
case DevFmtX61:
InputType.Format.nChannels = 7;
InputType.dwChannelMask = X6DOT1;
break;
case DevFmtX71:
InputType.Format.nChannels = 8;
InputType.dwChannelMask = X7DOT1;
break;
case DevFmtX3D71:
case DevFmtAmbi3D:
return E_FAIL;
}
switch(mDevice->FmtType)
{
/* NOTE: Signedness doesn't matter, the converter will handle it. */
case DevFmtByte:
case DevFmtUByte:
InputType.Format.wBitsPerSample = 8;
InputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtShort:
case DevFmtUShort:
InputType.Format.wBitsPerSample = 16;
InputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtInt:
case DevFmtUInt:
InputType.Format.wBitsPerSample = 32;
InputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
break;
case DevFmtFloat:
InputType.Format.wBitsPerSample = 32;
InputType.SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
break;
}
InputType.Samples.wValidBitsPerSample = InputType.Format.wBitsPerSample;
InputType.Format.nSamplesPerSec = mDevice->Frequency;
InputType.Format.nBlockAlign = static_cast<WORD>(InputType.Format.nChannels *
InputType.Format.wBitsPerSample / 8);
InputType.Format.nAvgBytesPerSec = InputType.Format.nSamplesPerSec *
InputType.Format.nBlockAlign;
InputType.Format.cbSize = sizeof(InputType) - sizeof(InputType.Format);
TraceFormat("Requesting capture format", &InputType.Format);
hr = mClient->IsFormatSupported(AUDCLNT_SHAREMODE_SHARED, &InputType.Format, &wfx);
if(FAILED(hr))
{
WARN("Failed to check format support: 0x%08lx\n", hr);
hr = mClient->GetMixFormat(&wfx);
}
if(FAILED(hr))
{
ERR("Failed to check format support: 0x%08lx\n", hr);
return hr;
}
mSampleConv = nullptr;
mChannelConv = {};
if(wfx != nullptr)
{
TraceFormat("Got capture format", wfx);
if(!MakeExtensible(&InputType, wfx))
{
CoTaskMemFree(wfx);
return E_FAIL;
}
CoTaskMemFree(wfx);
wfx = nullptr;
auto validate_fmt = [](DeviceBase *device, uint32_t chancount, DWORD chanmask) noexcept
-> bool
{
switch(device->FmtChans)
{
/* If the device wants mono, we can handle any input. */
case DevFmtMono:
return true;
/* If the device wants stereo, we can handle mono or stereo input. */
case DevFmtStereo:
return (chancount == 2 && (chanmask == 0 || (chanmask&StereoMask) == STEREO))
|| (chancount == 1 && (chanmask&MonoMask) == MONO);
/* Otherwise, the device must match the input type. */
case DevFmtQuad:
return (chancount == 4 && (chanmask == 0 || (chanmask&QuadMask) == QUAD));
/* 5.1 (Side) and 5.1 (Rear) are interchangeable here. */
case DevFmtX51:
return (chancount == 6 && (chanmask == 0 || (chanmask&X51Mask) == X5DOT1
|| (chanmask&X51RearMask) == X5DOT1REAR));
case DevFmtX61:
return (chancount == 7 && (chanmask == 0 || (chanmask&X61Mask) == X6DOT1));
case DevFmtX71:
case DevFmtX3D71:
return (chancount == 8 && (chanmask == 0 || (chanmask&X71Mask) == X7DOT1));
case DevFmtAmbi3D:
return (chanmask == 0 && chancount == device->channelsFromFmt());
}
return false;
};
if(!validate_fmt(mDevice, InputType.Format.nChannels, InputType.dwChannelMask))
{
ERR("Failed to match format, wanted: %s %s %uhz, got: 0x%08lx mask %d channel%s %d-bit %luhz\n",
DevFmtChannelsString(mDevice->FmtChans), DevFmtTypeString(mDevice->FmtType),
mDevice->Frequency, InputType.dwChannelMask, InputType.Format.nChannels,
(InputType.Format.nChannels==1)?"":"s", InputType.Format.wBitsPerSample,
InputType.Format.nSamplesPerSec);
return E_FAIL;
}
}
DevFmtType srcType{};
if(IsEqualGUID(InputType.SubFormat, KSDATAFORMAT_SUBTYPE_PCM))
{
if(InputType.Format.wBitsPerSample == 8)
srcType = DevFmtUByte;
else if(InputType.Format.wBitsPerSample == 16)
srcType = DevFmtShort;
else if(InputType.Format.wBitsPerSample == 32)
srcType = DevFmtInt;
else
{
ERR("Unhandled integer bit depth: %d\n", InputType.Format.wBitsPerSample);
return E_FAIL;
}
}
else if(IsEqualGUID(InputType.SubFormat, KSDATAFORMAT_SUBTYPE_IEEE_FLOAT))
{
if(InputType.Format.wBitsPerSample == 32)
srcType = DevFmtFloat;
else
{
ERR("Unhandled float bit depth: %d\n", InputType.Format.wBitsPerSample);
return E_FAIL;
}
}
else
{
ERR("Unhandled format sub-type: %s\n", GuidPrinter{InputType.SubFormat}.c_str());
return E_FAIL;
}
if(mDevice->FmtChans == DevFmtMono && InputType.Format.nChannels != 1)
{
uint chanmask{(1u<<InputType.Format.nChannels) - 1u};
/* Exclude LFE from the downmix. */
if((InputType.dwChannelMask&SPEAKER_LOW_FREQUENCY))
{
constexpr auto lfemask = MaskFromTopBits(SPEAKER_LOW_FREQUENCY);
const int lfeidx{al::popcount(InputType.dwChannelMask&lfemask) - 1};
chanmask &= ~(1u << lfeidx);
}
mChannelConv = ChannelConverter{srcType, InputType.Format.nChannels, chanmask,
mDevice->FmtChans};
TRACE("Created %s multichannel-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(mDevice->FmtChans == DevFmtStereo && InputType.Format.nChannels == 1)
{
mChannelConv = ChannelConverter{srcType, 1, 0x1, mDevice->FmtChans};
TRACE("Created %s mono-to-stereo converter\n", DevFmtTypeString(srcType));
srcType = DevFmtFloat;
}
if(mDevice->Frequency != InputType.Format.nSamplesPerSec || mDevice->FmtType != srcType)
{
mSampleConv = CreateSampleConverter(srcType, mDevice->FmtType, mDevice->channelsFromFmt(),
InputType.Format.nSamplesPerSec, mDevice->Frequency, Resampler::FastBSinc24);
if(!mSampleConv)
{
ERR("Failed to create converter for %s format, dst: %s %uhz, src: %s %luhz\n",
DevFmtChannelsString(mDevice->FmtChans), DevFmtTypeString(mDevice->FmtType),
mDevice->Frequency, DevFmtTypeString(srcType), InputType.Format.nSamplesPerSec);
return E_FAIL;
}
TRACE("Created converter for %s format, dst: %s %uhz, src: %s %luhz\n",
DevFmtChannelsString(mDevice->FmtChans), DevFmtTypeString(mDevice->FmtType),
mDevice->Frequency, DevFmtTypeString(srcType), InputType.Format.nSamplesPerSec);
}
hr = mClient->Initialize(AUDCLNT_SHAREMODE_SHARED, AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
buf_time.count(), 0, &InputType.Format, nullptr);
if(FAILED(hr))
{
ERR("Failed to initialize audio client: 0x%08lx\n", hr);
return hr;
}
UINT32 buffer_len{};
ReferenceTime min_per{};
hr = mClient->GetDevicePeriod(&reinterpret_cast<REFERENCE_TIME&>(min_per), nullptr);
if(SUCCEEDED(hr))
hr = mClient->GetBufferSize(&buffer_len);
if(FAILED(hr))
{
ERR("Failed to get buffer size: 0x%08lx\n", hr);
return hr;
}
mDevice->UpdateSize = RefTime2Samples(min_per, mDevice->Frequency);
mDevice->BufferSize = buffer_len;
mRing = RingBuffer::Create(buffer_len, mDevice->frameSizeFromFmt(), false);
hr = mClient->SetEventHandle(mNotifyEvent);
if(FAILED(hr))
{
ERR("Failed to set event handle: 0x%08lx\n", hr);
return hr;
}
return hr;
}
void WasapiCapture::start()
{
const HRESULT hr{pushMessage(MsgType::StartDevice).get()};
if(FAILED(hr))
throw al::backend_exception{al::backend_error::DeviceError,
"Failed to start recording: 0x%lx", hr};
}
HRESULT WasapiCapture::startProxy()
{
ResetEvent(mNotifyEvent);
HRESULT hr{mClient->Start()};
if(FAILED(hr))
{
ERR("Failed to start audio client: 0x%08lx\n", hr);
return hr;
}
void *ptr;
hr = mClient->GetService(IID_IAudioCaptureClient, &ptr);
if(SUCCEEDED(hr))
{
mCapture = ComPtr<IAudioCaptureClient>{static_cast<IAudioCaptureClient*>(ptr)};
try {
mKillNow.store(false, std::memory_order_release);
mThread = std::thread{std::mem_fn(&WasapiCapture::recordProc), this};
}
catch(...) {
mCapture = nullptr;
ERR("Failed to start thread\n");
hr = E_FAIL;
}
}
if(FAILED(hr))
{
mClient->Stop();
mClient->Reset();
}
return hr;
}
void WasapiCapture::stop()
{ pushMessage(MsgType::StopDevice).wait(); }
void WasapiCapture::stopProxy()
{
if(!mCapture || !mThread.joinable())
return;
mKillNow.store(true, std::memory_order_release);
mThread.join();
mCapture = nullptr;
mClient->Stop();
mClient->Reset();
}
void WasapiCapture::captureSamples(al::byte *buffer, uint samples)
{ mRing->read(buffer, samples); }
uint WasapiCapture::availableSamples()
{ return static_cast<uint>(mRing->readSpace()); }
} // namespace
bool WasapiBackendFactory::init()
{
static HRESULT InitResult{E_FAIL};
if(FAILED(InitResult)) try
{
std::promise<HRESULT> promise;
auto future = promise.get_future();
std::thread{&WasapiProxy::messageHandler, &promise}.detach();
InitResult = future.get();
}
catch(...) {
}
return SUCCEEDED(InitResult);
}
bool WasapiBackendFactory::querySupport(BackendType type)
{ return type == BackendType::Playback || type == BackendType::Capture; }
std::string WasapiBackendFactory::probe(BackendType type)
{
std::string outnames;
switch(type)
{
case BackendType::Playback:
WasapiProxy::pushMessageStatic(MsgType::EnumeratePlayback).wait();
for(const DevMap &entry : PlaybackDevices)
{
/* +1 to also append the null char (to ensure a null-separated list
* and double-null terminated list).
*/
outnames.append(DevNameHead).append(entry.name.c_str(), entry.name.length()+1);
}
break;
case BackendType::Capture:
WasapiProxy::pushMessageStatic(MsgType::EnumerateCapture).wait();
for(const DevMap &entry : CaptureDevices)
outnames.append(DevNameHead).append(entry.name.c_str(), entry.name.length()+1);
break;
}
return outnames;
}
BackendPtr WasapiBackendFactory::createBackend(DeviceBase *device, BackendType type)
{
if(type == BackendType::Playback)
return BackendPtr{new WasapiPlayback{device}};
if(type == BackendType::Capture)
return BackendPtr{new WasapiCapture{device}};
return nullptr;
}
BackendFactory &WasapiBackendFactory::getFactory()
{
static WasapiBackendFactory factory{};
return factory;
}