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axmol/thirdparty/openal/alc/backends/dsound.cpp

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/**
* OpenAL cross platform audio library
* Copyright (C) 1999-2007 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 "dsound.h"
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#include <memory.h>
#include <cguid.h>
#include <mmreg.h>
#ifndef _WAVEFORMATEXTENSIBLE_
#include <ks.h>
#include <ksmedia.h>
#endif
#include <atomic>
#include <cassert>
#include <thread>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include "alnumeric.h"
#include "comptr.h"
#include "core/device.h"
#include "core/helpers.h"
#include "core/logging.h"
#include "dynload.h"
#include "ringbuffer.h"
#include "strutils.h"
#include "threads.h"
/* MinGW-w64 needs this for some unknown reason now. */
using LPCWAVEFORMATEX = const WAVEFORMATEX*;
#include <dsound.h>
#ifndef DSSPEAKER_5POINT1
# define DSSPEAKER_5POINT1 0x00000006
#endif
#ifndef DSSPEAKER_5POINT1_BACK
# define DSSPEAKER_5POINT1_BACK 0x00000006
#endif
#ifndef DSSPEAKER_7POINT1
# define DSSPEAKER_7POINT1 0x00000007
#endif
#ifndef DSSPEAKER_7POINT1_SURROUND
# define DSSPEAKER_7POINT1_SURROUND 0x00000008
#endif
#ifndef DSSPEAKER_5POINT1_SURROUND
# define DSSPEAKER_5POINT1_SURROUND 0x00000009
#endif
/* 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
namespace {
#define DEVNAME_HEAD "OpenAL Soft on "
#ifdef HAVE_DYNLOAD
void *ds_handle;
HRESULT (WINAPI *pDirectSoundCreate)(const GUID *pcGuidDevice, IDirectSound **ppDS, IUnknown *pUnkOuter);
HRESULT (WINAPI *pDirectSoundEnumerateW)(LPDSENUMCALLBACKW pDSEnumCallback, void *pContext);
HRESULT (WINAPI *pDirectSoundCaptureCreate)(const GUID *pcGuidDevice, IDirectSoundCapture **ppDSC, IUnknown *pUnkOuter);
HRESULT (WINAPI *pDirectSoundCaptureEnumerateW)(LPDSENUMCALLBACKW pDSEnumCallback, void *pContext);
#ifndef IN_IDE_PARSER
#define DirectSoundCreate pDirectSoundCreate
#define DirectSoundEnumerateW pDirectSoundEnumerateW
#define DirectSoundCaptureCreate pDirectSoundCaptureCreate
#define DirectSoundCaptureEnumerateW pDirectSoundCaptureEnumerateW
#endif
#endif
#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 MAX_UPDATES 128
struct DevMap {
std::string name;
GUID guid;
template<typename T0, typename T1>
DevMap(T0&& name_, T1&& guid_)
: name{std::forward<T0>(name_)}, guid{std::forward<T1>(guid_)}
{ }
};
al::vector<DevMap> PlaybackDevices;
al::vector<DevMap> CaptureDevices;
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();
}
BOOL CALLBACK DSoundEnumDevices(GUID *guid, const WCHAR *desc, const WCHAR*, void *data) noexcept
{
if(!guid)
return TRUE;
auto& devices = *static_cast<al::vector<DevMap>*>(data);
const std::string basename{DEVNAME_HEAD + wstr_to_utf8(desc)};
int count{1};
std::string newname{basename};
while(checkName(devices, newname))
{
newname = basename;
newname += " #";
newname += std::to_string(++count);
}
devices.emplace_back(std::move(newname), *guid);
const DevMap &newentry = devices.back();
OLECHAR *guidstr{nullptr};
HRESULT hr{StringFromCLSID(*guid, &guidstr)};
if(SUCCEEDED(hr))
{
TRACE("Got device \"%s\", GUID \"%ls\"\n", newentry.name.c_str(), guidstr);
CoTaskMemFree(guidstr);
}
return TRUE;
}
struct DSoundPlayback final : public BackendBase {
DSoundPlayback(DeviceBase *device) noexcept : BackendBase{device} { }
~DSoundPlayback() override;
int mixerProc();
void open(const char *name) override;
bool reset() override;
void start() override;
void stop() override;
ComPtr<IDirectSound> mDS;
ComPtr<IDirectSoundBuffer> mPrimaryBuffer;
ComPtr<IDirectSoundBuffer> mBuffer;
ComPtr<IDirectSoundNotify> mNotifies;
HANDLE mNotifyEvent{nullptr};
std::atomic<bool> mKillNow{true};
std::thread mThread;
DEF_NEWDEL(DSoundPlayback)
};
DSoundPlayback::~DSoundPlayback()
{
mNotifies = nullptr;
mBuffer = nullptr;
mPrimaryBuffer = nullptr;
mDS = nullptr;
if(mNotifyEvent)
CloseHandle(mNotifyEvent);
mNotifyEvent = nullptr;
}
FORCE_ALIGN int DSoundPlayback::mixerProc()
{
SetRTPriority();
althrd_setname(MIXER_THREAD_NAME);
DSBCAPS DSBCaps{};
DSBCaps.dwSize = sizeof(DSBCaps);
HRESULT err{mBuffer->GetCaps(&DSBCaps)};
if(FAILED(err))
{
ERR("Failed to get buffer caps: 0x%lx\n", err);
mDevice->handleDisconnect("Failure retrieving playback buffer info: 0x%lx", err);
return 1;
}
const size_t FrameStep{mDevice->channelsFromFmt()};
uint FrameSize{mDevice->frameSizeFromFmt()};
DWORD FragSize{mDevice->UpdateSize * FrameSize};
bool Playing{false};
DWORD LastCursor{0u};
mBuffer->GetCurrentPosition(&LastCursor, nullptr);
while(!mKillNow.load(std::memory_order_acquire)
&& mDevice->Connected.load(std::memory_order_acquire))
{
// Get current play cursor
DWORD PlayCursor;
mBuffer->GetCurrentPosition(&PlayCursor, nullptr);
DWORD avail = (PlayCursor-LastCursor+DSBCaps.dwBufferBytes) % DSBCaps.dwBufferBytes;
if(avail < FragSize)
{
if(!Playing)
{
err = mBuffer->Play(0, 0, DSBPLAY_LOOPING);
if(FAILED(err))
{
ERR("Failed to play buffer: 0x%lx\n", err);
mDevice->handleDisconnect("Failure starting playback: 0x%lx", err);
return 1;
}
Playing = true;
}
avail = WaitForSingleObjectEx(mNotifyEvent, 2000, FALSE);
if(avail != WAIT_OBJECT_0)
ERR("WaitForSingleObjectEx error: 0x%lx\n", avail);
continue;
}
avail -= avail%FragSize;
// Lock output buffer
void *WritePtr1, *WritePtr2;
DWORD WriteCnt1{0u}, WriteCnt2{0u};
err = mBuffer->Lock(LastCursor, avail, &WritePtr1, &WriteCnt1, &WritePtr2, &WriteCnt2, 0);
// If the buffer is lost, restore it and lock
if(err == DSERR_BUFFERLOST)
{
WARN("Buffer lost, restoring...\n");
err = mBuffer->Restore();
if(SUCCEEDED(err))
{
Playing = false;
LastCursor = 0;
err = mBuffer->Lock(0, DSBCaps.dwBufferBytes, &WritePtr1, &WriteCnt1,
&WritePtr2, &WriteCnt2, 0);
}
}
if(SUCCEEDED(err))
{
mDevice->renderSamples(WritePtr1, WriteCnt1/FrameSize, FrameStep);
if(WriteCnt2 > 0)
mDevice->renderSamples(WritePtr2, WriteCnt2/FrameSize, FrameStep);
mBuffer->Unlock(WritePtr1, WriteCnt1, WritePtr2, WriteCnt2);
}
else
{
ERR("Buffer lock error: %#lx\n", err);
mDevice->handleDisconnect("Failed to lock output buffer: 0x%lx", err);
return 1;
}
// Update old write cursor location
LastCursor += WriteCnt1+WriteCnt2;
LastCursor %= DSBCaps.dwBufferBytes;
}
return 0;
}
void DSoundPlayback::open(const char *name)
{
HRESULT hr;
if(PlaybackDevices.empty())
{
/* Initialize COM to prevent name truncation */
HRESULT hrcom{CoInitialize(nullptr)};
hr = DirectSoundEnumerateW(DSoundEnumDevices, &PlaybackDevices);
if(FAILED(hr))
ERR("Error enumerating DirectSound devices (0x%lx)!\n", hr);
if(SUCCEEDED(hrcom))
CoUninitialize();
}
const GUID *guid{nullptr};
if(!name && !PlaybackDevices.empty())
{
name = PlaybackDevices[0].name.c_str();
guid = &PlaybackDevices[0].guid;
}
else
{
auto iter = std::find_if(PlaybackDevices.cbegin(), PlaybackDevices.cend(),
[name](const DevMap &entry) -> bool { return entry.name == name; });
if(iter == PlaybackDevices.cend())
{
GUID id{};
hr = CLSIDFromString(utf8_to_wstr(name).c_str(), &id);
if(SUCCEEDED(hr))
iter = std::find_if(PlaybackDevices.cbegin(), PlaybackDevices.cend(),
[&id](const DevMap &entry) -> bool { return entry.guid == id; });
if(iter == PlaybackDevices.cend())
throw al::backend_exception{al::backend_error::NoDevice,
"Device name \"%s\" not found", name};
}
guid = &iter->guid;
}
hr = DS_OK;
if(!mNotifyEvent)
{
mNotifyEvent = CreateEventW(nullptr, FALSE, FALSE, nullptr);
if(!mNotifyEvent) hr = E_FAIL;
}
//DirectSound Init code
ComPtr<IDirectSound> ds;
if(SUCCEEDED(hr))
hr = DirectSoundCreate(guid, ds.getPtr(), nullptr);
if(SUCCEEDED(hr))
hr = ds->SetCooperativeLevel(GetForegroundWindow(), DSSCL_PRIORITY);
if(FAILED(hr))
throw al::backend_exception{al::backend_error::DeviceError, "Device init failed: 0x%08lx",
hr};
mNotifies = nullptr;
mBuffer = nullptr;
mPrimaryBuffer = nullptr;
mDS = std::move(ds);
mDevice->DeviceName = name;
}
bool DSoundPlayback::reset()
{
mNotifies = nullptr;
mBuffer = nullptr;
mPrimaryBuffer = nullptr;
switch(mDevice->FmtType)
{
case DevFmtByte:
mDevice->FmtType = DevFmtUByte;
break;
case DevFmtFloat:
if(mDevice->Flags.test(SampleTypeRequest))
break;
/* fall-through */
case DevFmtUShort:
mDevice->FmtType = DevFmtShort;
break;
case DevFmtUInt:
mDevice->FmtType = DevFmtInt;
break;
case DevFmtUByte:
case DevFmtShort:
case DevFmtInt:
break;
}
WAVEFORMATEXTENSIBLE OutputType{};
DWORD speakers{};
HRESULT hr{mDS->GetSpeakerConfig(&speakers)};
if(FAILED(hr))
throw al::backend_exception{al::backend_error::DeviceError,
"Failed to get speaker config: 0x%08lx", hr};
speakers = DSSPEAKER_CONFIG(speakers);
if(!mDevice->Flags.test(ChannelsRequest))
{
if(speakers == DSSPEAKER_MONO)
mDevice->FmtChans = DevFmtMono;
else if(speakers == DSSPEAKER_STEREO || speakers == DSSPEAKER_HEADPHONE)
mDevice->FmtChans = DevFmtStereo;
else if(speakers == DSSPEAKER_QUAD)
mDevice->FmtChans = DevFmtQuad;
else if(speakers == DSSPEAKER_5POINT1_SURROUND || speakers == DSSPEAKER_5POINT1_BACK)
mDevice->FmtChans = DevFmtX51;
else if(speakers == DSSPEAKER_7POINT1 || speakers == DSSPEAKER_7POINT1_SURROUND)
mDevice->FmtChans = DevFmtX71;
else
ERR("Unknown system speaker config: 0x%lx\n", speakers);
}
mDevice->Flags.set(DirectEar, (speakers == DSSPEAKER_HEADPHONE));
const bool isRear51{speakers == DSSPEAKER_5POINT1_BACK};
switch(mDevice->FmtChans)
{
case DevFmtMono: OutputType.dwChannelMask = MONO; break;
case DevFmtAmbi3D: mDevice->FmtChans = DevFmtStereo;
/* fall-through */
case DevFmtStereo: OutputType.dwChannelMask = STEREO; break;
case DevFmtQuad: OutputType.dwChannelMask = QUAD; break;
case DevFmtX51: OutputType.dwChannelMask = isRear51 ? X5DOT1REAR : X5DOT1; break;
case DevFmtX61: OutputType.dwChannelMask = X6DOT1; break;
case DevFmtX71: OutputType.dwChannelMask = X7DOT1; break;
case DevFmtX3D71: OutputType.dwChannelMask = X7DOT1; break;
}
retry_open:
hr = S_OK;
OutputType.Format.wFormatTag = WAVE_FORMAT_PCM;
OutputType.Format.nChannels = static_cast<WORD>(mDevice->channelsFromFmt());
OutputType.Format.wBitsPerSample = static_cast<WORD>(mDevice->bytesFromFmt() * 8);
OutputType.Format.nBlockAlign = static_cast<WORD>(OutputType.Format.nChannels *
OutputType.Format.wBitsPerSample / 8);
OutputType.Format.nSamplesPerSec = mDevice->Frequency;
OutputType.Format.nAvgBytesPerSec = OutputType.Format.nSamplesPerSec *
OutputType.Format.nBlockAlign;
OutputType.Format.cbSize = 0;
if(OutputType.Format.nChannels > 2 || mDevice->FmtType == DevFmtFloat)
{
OutputType.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
OutputType.Samples.wValidBitsPerSample = OutputType.Format.wBitsPerSample;
OutputType.Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
if(mDevice->FmtType == DevFmtFloat)
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
else
OutputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
mPrimaryBuffer = nullptr;
}
else
{
if(SUCCEEDED(hr) && !mPrimaryBuffer)
{
DSBUFFERDESC DSBDescription{};
DSBDescription.dwSize = sizeof(DSBDescription);
DSBDescription.dwFlags = DSBCAPS_PRIMARYBUFFER;
hr = mDS->CreateSoundBuffer(&DSBDescription, mPrimaryBuffer.getPtr(), nullptr);
}
if(SUCCEEDED(hr))
hr = mPrimaryBuffer->SetFormat(&OutputType.Format);
}
if(SUCCEEDED(hr))
{
uint num_updates{mDevice->BufferSize / mDevice->UpdateSize};
if(num_updates > MAX_UPDATES)
num_updates = MAX_UPDATES;
mDevice->BufferSize = mDevice->UpdateSize * num_updates;
DSBUFFERDESC DSBDescription{};
DSBDescription.dwSize = sizeof(DSBDescription);
DSBDescription.dwFlags = DSBCAPS_CTRLPOSITIONNOTIFY | DSBCAPS_GETCURRENTPOSITION2
| DSBCAPS_GLOBALFOCUS;
DSBDescription.dwBufferBytes = mDevice->BufferSize * OutputType.Format.nBlockAlign;
DSBDescription.lpwfxFormat = &OutputType.Format;
hr = mDS->CreateSoundBuffer(&DSBDescription, mBuffer.getPtr(), nullptr);
if(FAILED(hr) && mDevice->FmtType == DevFmtFloat)
{
mDevice->FmtType = DevFmtShort;
goto retry_open;
}
}
if(SUCCEEDED(hr))
{
void *ptr;
hr = mBuffer->QueryInterface(IID_IDirectSoundNotify, &ptr);
if(SUCCEEDED(hr))
{
mNotifies = ComPtr<IDirectSoundNotify>{static_cast<IDirectSoundNotify*>(ptr)};
uint num_updates{mDevice->BufferSize / mDevice->UpdateSize};
assert(num_updates <= MAX_UPDATES);
std::array<DSBPOSITIONNOTIFY,MAX_UPDATES> nots;
for(uint i{0};i < num_updates;++i)
{
nots[i].dwOffset = i * mDevice->UpdateSize * OutputType.Format.nBlockAlign;
nots[i].hEventNotify = mNotifyEvent;
}
if(mNotifies->SetNotificationPositions(num_updates, nots.data()) != DS_OK)
hr = E_FAIL;
}
}
if(FAILED(hr))
{
mNotifies = nullptr;
mBuffer = nullptr;
mPrimaryBuffer = nullptr;
return false;
}
ResetEvent(mNotifyEvent);
setDefaultWFXChannelOrder();
return true;
}
void DSoundPlayback::start()
{
try {
mKillNow.store(false, std::memory_order_release);
mThread = std::thread{std::mem_fn(&DSoundPlayback::mixerProc), this};
}
catch(std::exception& e) {
throw al::backend_exception{al::backend_error::DeviceError,
"Failed to start mixing thread: %s", e.what()};
}
}
void DSoundPlayback::stop()
{
if(mKillNow.exchange(true, std::memory_order_acq_rel) || !mThread.joinable())
return;
mThread.join();
mBuffer->Stop();
}
struct DSoundCapture final : public BackendBase {
DSoundCapture(DeviceBase *device) noexcept : BackendBase{device} { }
~DSoundCapture() override;
void open(const char *name) override;
void start() override;
void stop() override;
void captureSamples(al::byte *buffer, uint samples) override;
uint availableSamples() override;
ComPtr<IDirectSoundCapture> mDSC;
ComPtr<IDirectSoundCaptureBuffer> mDSCbuffer;
DWORD mBufferBytes{0u};
DWORD mCursor{0u};
RingBufferPtr mRing;
DEF_NEWDEL(DSoundCapture)
};
DSoundCapture::~DSoundCapture()
{
if(mDSCbuffer)
{
mDSCbuffer->Stop();
mDSCbuffer = nullptr;
}
mDSC = nullptr;
}
void DSoundCapture::open(const char *name)
{
HRESULT hr;
if(CaptureDevices.empty())
{
/* Initialize COM to prevent name truncation */
HRESULT hrcom{CoInitialize(nullptr)};
hr = DirectSoundCaptureEnumerateW(DSoundEnumDevices, &CaptureDevices);
if(FAILED(hr))
ERR("Error enumerating DirectSound devices (0x%lx)!\n", hr);
if(SUCCEEDED(hrcom))
CoUninitialize();
}
const GUID *guid{nullptr};
if(!name && !CaptureDevices.empty())
{
name = CaptureDevices[0].name.c_str();
guid = &CaptureDevices[0].guid;
}
else
{
auto iter = std::find_if(CaptureDevices.cbegin(), CaptureDevices.cend(),
[name](const DevMap &entry) -> bool { return entry.name == name; });
if(iter == CaptureDevices.cend())
{
GUID id{};
hr = CLSIDFromString(utf8_to_wstr(name).c_str(), &id);
if(SUCCEEDED(hr))
iter = std::find_if(CaptureDevices.cbegin(), CaptureDevices.cend(),
[&id](const DevMap &entry) -> bool { return entry.guid == id; });
if(iter == CaptureDevices.cend())
throw al::backend_exception{al::backend_error::NoDevice,
"Device name \"%s\" not found", name};
}
guid = &iter->guid;
}
switch(mDevice->FmtType)
{
case DevFmtByte:
case DevFmtUShort:
case DevFmtUInt:
WARN("%s capture samples not supported\n", DevFmtTypeString(mDevice->FmtType));
throw al::backend_exception{al::backend_error::DeviceError,
"%s capture samples not supported", DevFmtTypeString(mDevice->FmtType)};
case DevFmtUByte:
case DevFmtShort:
case DevFmtInt:
case DevFmtFloat:
break;
}
WAVEFORMATEXTENSIBLE InputType{};
switch(mDevice->FmtChans)
{
case DevFmtMono: InputType.dwChannelMask = MONO; break;
case DevFmtStereo: InputType.dwChannelMask = STEREO; break;
case DevFmtQuad: InputType.dwChannelMask = QUAD; break;
case DevFmtX51: InputType.dwChannelMask = X5DOT1; break;
case DevFmtX61: InputType.dwChannelMask = X6DOT1; break;
case DevFmtX71: InputType.dwChannelMask = X7DOT1; break;
case DevFmtX3D71:
case DevFmtAmbi3D:
WARN("%s capture not supported\n", DevFmtChannelsString(mDevice->FmtChans));
throw al::backend_exception{al::backend_error::DeviceError, "%s capture not supported",
DevFmtChannelsString(mDevice->FmtChans)};
}
InputType.Format.wFormatTag = WAVE_FORMAT_PCM;
InputType.Format.nChannels = static_cast<WORD>(mDevice->channelsFromFmt());
InputType.Format.wBitsPerSample = static_cast<WORD>(mDevice->bytesFromFmt() * 8);
InputType.Format.nBlockAlign = static_cast<WORD>(InputType.Format.nChannels *
InputType.Format.wBitsPerSample / 8);
InputType.Format.nSamplesPerSec = mDevice->Frequency;
InputType.Format.nAvgBytesPerSec = InputType.Format.nSamplesPerSec *
InputType.Format.nBlockAlign;
InputType.Format.cbSize = 0;
InputType.Samples.wValidBitsPerSample = InputType.Format.wBitsPerSample;
if(mDevice->FmtType == DevFmtFloat)
InputType.SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
else
InputType.SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
if(InputType.Format.nChannels > 2 || mDevice->FmtType == DevFmtFloat)
{
InputType.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
InputType.Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
}
uint samples{mDevice->BufferSize};
samples = maxu(samples, 100 * mDevice->Frequency / 1000);
DSCBUFFERDESC DSCBDescription{};
DSCBDescription.dwSize = sizeof(DSCBDescription);
DSCBDescription.dwFlags = 0;
DSCBDescription.dwBufferBytes = samples * InputType.Format.nBlockAlign;
DSCBDescription.lpwfxFormat = &InputType.Format;
//DirectSoundCapture Init code
hr = DirectSoundCaptureCreate(guid, mDSC.getPtr(), nullptr);
if(SUCCEEDED(hr))
mDSC->CreateCaptureBuffer(&DSCBDescription, mDSCbuffer.getPtr(), nullptr);
if(SUCCEEDED(hr))
mRing = RingBuffer::Create(mDevice->BufferSize, InputType.Format.nBlockAlign, false);
if(FAILED(hr))
{
mRing = nullptr;
mDSCbuffer = nullptr;
mDSC = nullptr;
throw al::backend_exception{al::backend_error::DeviceError, "Device init failed: 0x%08lx",
hr};
}
mBufferBytes = DSCBDescription.dwBufferBytes;
setDefaultWFXChannelOrder();
mDevice->DeviceName = name;
}
void DSoundCapture::start()
{
const HRESULT hr{mDSCbuffer->Start(DSCBSTART_LOOPING)};
if(FAILED(hr))
throw al::backend_exception{al::backend_error::DeviceError,
"Failure starting capture: 0x%lx", hr};
}
void DSoundCapture::stop()
{
HRESULT hr{mDSCbuffer->Stop()};
if(FAILED(hr))
{
ERR("stop failed: 0x%08lx\n", hr);
mDevice->handleDisconnect("Failure stopping capture: 0x%lx", hr);
}
}
void DSoundCapture::captureSamples(al::byte *buffer, uint samples)
{ mRing->read(buffer, samples); }
uint DSoundCapture::availableSamples()
{
if(!mDevice->Connected.load(std::memory_order_acquire))
return static_cast<uint>(mRing->readSpace());
const uint FrameSize{mDevice->frameSizeFromFmt()};
const DWORD BufferBytes{mBufferBytes};
const DWORD LastCursor{mCursor};
DWORD ReadCursor{};
void *ReadPtr1{}, *ReadPtr2{};
DWORD ReadCnt1{}, ReadCnt2{};
HRESULT hr{mDSCbuffer->GetCurrentPosition(nullptr, &ReadCursor)};
if(SUCCEEDED(hr))
{
const DWORD NumBytes{(BufferBytes+ReadCursor-LastCursor) % BufferBytes};
if(!NumBytes) return static_cast<uint>(mRing->readSpace());
hr = mDSCbuffer->Lock(LastCursor, NumBytes, &ReadPtr1, &ReadCnt1, &ReadPtr2, &ReadCnt2, 0);
}
if(SUCCEEDED(hr))
{
mRing->write(ReadPtr1, ReadCnt1/FrameSize);
if(ReadPtr2 != nullptr && ReadCnt2 > 0)
mRing->write(ReadPtr2, ReadCnt2/FrameSize);
hr = mDSCbuffer->Unlock(ReadPtr1, ReadCnt1, ReadPtr2, ReadCnt2);
mCursor = ReadCursor;
}
if(FAILED(hr))
{
ERR("update failed: 0x%08lx\n", hr);
mDevice->handleDisconnect("Failure retrieving capture data: 0x%lx", hr);
}
return static_cast<uint>(mRing->readSpace());
}
} // namespace
BackendFactory &DSoundBackendFactory::getFactory()
{
static DSoundBackendFactory factory{};
return factory;
}
bool DSoundBackendFactory::init()
{
#ifdef HAVE_DYNLOAD
if(!ds_handle)
{
ds_handle = LoadLib("dsound.dll");
if(!ds_handle)
{
ERR("Failed to load dsound.dll\n");
return false;
}
#define LOAD_FUNC(f) do { \
p##f = reinterpret_cast<decltype(p##f)>(GetSymbol(ds_handle, #f)); \
if(!p##f) \
{ \
CloseLib(ds_handle); \
ds_handle = nullptr; \
return false; \
} \
} while(0)
LOAD_FUNC(DirectSoundCreate);
LOAD_FUNC(DirectSoundEnumerateW);
LOAD_FUNC(DirectSoundCaptureCreate);
LOAD_FUNC(DirectSoundCaptureEnumerateW);
#undef LOAD_FUNC
}
#endif
return true;
}
bool DSoundBackendFactory::querySupport(BackendType type)
{ return (type == BackendType::Playback || type == BackendType::Capture); }
std::string DSoundBackendFactory::probe(BackendType type)
{
std::string outnames;
auto add_device = [&outnames](const DevMap &entry) -> void
{
/* +1 to also append the null char (to ensure a null-separated list and
* double-null terminated list).
*/
outnames.append(entry.name.c_str(), entry.name.length()+1);
};
/* Initialize COM to prevent name truncation */
HRESULT hr;
HRESULT hrcom{CoInitialize(nullptr)};
switch(type)
{
case BackendType::Playback:
PlaybackDevices.clear();
hr = DirectSoundEnumerateW(DSoundEnumDevices, &PlaybackDevices);
if(FAILED(hr))
ERR("Error enumerating DirectSound playback devices (0x%lx)!\n", hr);
std::for_each(PlaybackDevices.cbegin(), PlaybackDevices.cend(), add_device);
break;
case BackendType::Capture:
CaptureDevices.clear();
hr = DirectSoundCaptureEnumerateW(DSoundEnumDevices, &CaptureDevices);
if(FAILED(hr))
ERR("Error enumerating DirectSound capture devices (0x%lx)!\n", hr);
std::for_each(CaptureDevices.cbegin(), CaptureDevices.cend(), add_device);
break;
}
if(SUCCEEDED(hrcom))
CoUninitialize();
return outnames;
}
BackendPtr DSoundBackendFactory::createBackend(DeviceBase *device, BackendType type)
{
if(type == BackendType::Playback)
return BackendPtr{new DSoundPlayback{device}};
if(type == BackendType::Capture)
return BackendPtr{new DSoundCapture{device}};
return nullptr;
}
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