diff options
Diffstat (limited to 'alc/backends/dsound.cpp')
| -rw-r--r-- | alc/backends/dsound.cpp | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/alc/backends/dsound.cpp b/alc/backends/dsound.cpp new file mode 100644 index 00000000..5a156d54 --- /dev/null +++ b/alc/backends/dsound.cpp @@ -0,0 +1,938 @@ +/** + * 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 "backends/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 "alcmain.h" +#include "alu.h" +#include "ringbuffer.h" +#include "compat.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 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) +{ + return std::find_if(list.cbegin(), list.cend(), + [&name](const DevMap &entry) -> bool + { return entry.name == name; } + ) != list.cend(); +} + +BOOL CALLBACK DSoundEnumDevices(GUID *guid, const WCHAR *desc, const WCHAR*, void *data) +{ + 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(ALCdevice *device) noexcept : BackendBase{device} { } + ~DSoundPlayback() override; + + int mixerProc(); + + ALCenum open(const ALCchar *name) override; + ALCboolean reset() override; + ALCboolean start() override; + void stop() override; + + IDirectSound *mDS{nullptr}; + IDirectSoundBuffer *mPrimaryBuffer{nullptr}; + IDirectSoundBuffer *mBuffer{nullptr}; + IDirectSoundNotify *mNotifies{nullptr}; + HANDLE mNotifyEvent{nullptr}; + + std::atomic<bool> mKillNow{true}; + std::thread mThread; + + DEF_NEWDEL(DSoundPlayback) +}; + +DSoundPlayback::~DSoundPlayback() +{ + if(mNotifies) + mNotifies->Release(); + mNotifies = nullptr; + if(mBuffer) + mBuffer->Release(); + mBuffer = nullptr; + if(mPrimaryBuffer) + mPrimaryBuffer->Release(); + mPrimaryBuffer = nullptr; + + if(mDS) + mDS->Release(); + 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); + aluHandleDisconnect(mDevice, "Failure retrieving playback buffer info: 0x%lx", err); + return 1; + } + + ALsizei 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); + aluHandleDisconnect(mDevice, "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)) + { + lock(); + aluMixData(mDevice, WritePtr1, WriteCnt1/FrameSize); + if(WriteCnt2 > 0) + aluMixData(mDevice, WritePtr2, WriteCnt2/FrameSize); + unlock(); + + mBuffer->Unlock(WritePtr1, WriteCnt1, WritePtr2, WriteCnt2); + } + else + { + ERR("Buffer lock error: %#lx\n", err); + aluHandleDisconnect(mDevice, "Failed to lock output buffer: 0x%lx", err); + return 1; + } + + // Update old write cursor location + LastCursor += WriteCnt1+WriteCnt2; + LastCursor %= DSBCaps.dwBufferBytes; + } + + return 0; +} + +ALCenum DSoundPlayback::open(const ALCchar *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()) + return ALC_INVALID_VALUE; + guid = &iter->guid; + } + + hr = DS_OK; + mNotifyEvent = CreateEventW(nullptr, FALSE, FALSE, nullptr); + if(!mNotifyEvent) hr = E_FAIL; + + //DirectSound Init code + if(SUCCEEDED(hr)) + hr = DirectSoundCreate(guid, &mDS, nullptr); + if(SUCCEEDED(hr)) + hr = mDS->SetCooperativeLevel(GetForegroundWindow(), DSSCL_PRIORITY); + if(FAILED(hr)) + { + ERR("Device init failed: 0x%08lx\n", hr); + return ALC_INVALID_VALUE; + } + + mDevice->DeviceName = name; + return ALC_NO_ERROR; +} + +ALCboolean DSoundPlayback::reset() +{ + if(mNotifies) + mNotifies->Release(); + mNotifies = nullptr; + if(mBuffer) + mBuffer->Release(); + mBuffer = nullptr; + if(mPrimaryBuffer) + mPrimaryBuffer->Release(); + mPrimaryBuffer = nullptr; + + switch(mDevice->FmtType) + { + case DevFmtByte: + mDevice->FmtType = DevFmtUByte; + break; + case DevFmtFloat: + if(mDevice->Flags.get<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(SUCCEEDED(hr)) + { + speakers = DSSPEAKER_CONFIG(speakers); + if(!mDevice->Flags.get<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) + mDevice->FmtChans = DevFmtX51; + else if(speakers == DSSPEAKER_5POINT1_BACK) + mDevice->FmtChans = DevFmtX51Rear; + else if(speakers == DSSPEAKER_7POINT1 || speakers == DSSPEAKER_7POINT1_SURROUND) + mDevice->FmtChans = DevFmtX71; + else + ERR("Unknown system speaker config: 0x%lx\n", speakers); + } + mDevice->IsHeadphones = (mDevice->FmtChans == DevFmtStereo && + speakers == DSSPEAKER_HEADPHONE); + + switch(mDevice->FmtChans) + { + case DevFmtMono: + OutputType.dwChannelMask = SPEAKER_FRONT_CENTER; + break; + case DevFmtAmbi3D: + mDevice->FmtChans = DevFmtStereo; + /*fall-through*/ + case DevFmtStereo: + OutputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT; + break; + case DevFmtQuad: + OutputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_BACK_LEFT | + SPEAKER_BACK_RIGHT; + break; + case DevFmtX51: + OutputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_FRONT_CENTER | + SPEAKER_LOW_FREQUENCY | + SPEAKER_SIDE_LEFT | + SPEAKER_SIDE_RIGHT; + break; + case DevFmtX51Rear: + OutputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_FRONT_CENTER | + SPEAKER_LOW_FREQUENCY | + SPEAKER_BACK_LEFT | + SPEAKER_BACK_RIGHT; + break; + case DevFmtX61: + OutputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_FRONT_CENTER | + SPEAKER_LOW_FREQUENCY | + SPEAKER_BACK_CENTER | + SPEAKER_SIDE_LEFT | + SPEAKER_SIDE_RIGHT; + break; + case DevFmtX71: + OutputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_FRONT_CENTER | + SPEAKER_LOW_FREQUENCY | + SPEAKER_BACK_LEFT | + SPEAKER_BACK_RIGHT | + SPEAKER_SIDE_LEFT | + SPEAKER_SIDE_RIGHT; + break; + } + +retry_open: + hr = S_OK; + OutputType.Format.wFormatTag = WAVE_FORMAT_PCM; + OutputType.Format.nChannels = mDevice->channelsFromFmt(); + OutputType.Format.wBitsPerSample = mDevice->bytesFromFmt() * 8; + OutputType.Format.nBlockAlign = 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; + + if(mPrimaryBuffer) + mPrimaryBuffer->Release(); + mPrimaryBuffer = nullptr; + } + else + { + if(SUCCEEDED(hr) && !mPrimaryBuffer) + { + DSBUFFERDESC DSBDescription{}; + DSBDescription.dwSize = sizeof(DSBDescription); + DSBDescription.dwFlags = DSBCAPS_PRIMARYBUFFER; + hr = mDS->CreateSoundBuffer(&DSBDescription, &mPrimaryBuffer, nullptr); + } + if(SUCCEEDED(hr)) + hr = mPrimaryBuffer->SetFormat(&OutputType.Format); + } + + if(SUCCEEDED(hr)) + { + ALuint 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, 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)) + { + auto Notifies = static_cast<IDirectSoundNotify*>(ptr); + mNotifies = Notifies; + + ALuint num_updates{mDevice->BufferSize / mDevice->UpdateSize}; + assert(num_updates <= MAX_UPDATES); + + std::array<DSBPOSITIONNOTIFY,MAX_UPDATES> nots; + for(ALuint i{0};i < num_updates;++i) + { + nots[i].dwOffset = i * mDevice->UpdateSize * OutputType.Format.nBlockAlign; + nots[i].hEventNotify = mNotifyEvent; + } + if(Notifies->SetNotificationPositions(num_updates, nots.data()) != DS_OK) + hr = E_FAIL; + } + } + + if(FAILED(hr)) + { + if(mNotifies) + mNotifies->Release(); + mNotifies = nullptr; + if(mBuffer) + mBuffer->Release(); + mBuffer = nullptr; + if(mPrimaryBuffer) + mPrimaryBuffer->Release(); + mPrimaryBuffer = nullptr; + return ALC_FALSE; + } + + ResetEvent(mNotifyEvent); + SetDefaultWFXChannelOrder(mDevice); + + return ALC_TRUE; +} + +ALCboolean DSoundPlayback::start() +{ + try { + mKillNow.store(false, std::memory_order_release); + mThread = std::thread{std::mem_fn(&DSoundPlayback::mixerProc), this}; + return ALC_TRUE; + } + catch(std::exception& e) { + ERR("Failed to start mixing thread: %s\n", e.what()); + } + catch(...) { + } + return ALC_FALSE; +} + +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(ALCdevice *device) noexcept : BackendBase{device} { } + ~DSoundCapture() override; + + ALCenum open(const ALCchar *name) override; + ALCboolean start() override; + void stop() override; + ALCenum captureSamples(void *buffer, ALCuint samples) override; + ALCuint availableSamples() override; + + IDirectSoundCapture *mDSC{nullptr}; + IDirectSoundCaptureBuffer *mDSCbuffer{nullptr}; + DWORD mBufferBytes{0u}; + DWORD mCursor{0u}; + + RingBufferPtr mRing; + + DEF_NEWDEL(DSoundCapture) +}; + +DSoundCapture::~DSoundCapture() +{ + if(mDSCbuffer) + { + mDSCbuffer->Stop(); + mDSCbuffer->Release(); + mDSCbuffer = nullptr; + } + + if(mDSC) + mDSC->Release(); + mDSC = nullptr; +} + + +ALCenum DSoundCapture::open(const ALCchar *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()) + return ALC_INVALID_VALUE; + guid = &iter->guid; + } + + switch(mDevice->FmtType) + { + case DevFmtByte: + case DevFmtUShort: + case DevFmtUInt: + WARN("%s capture samples not supported\n", DevFmtTypeString(mDevice->FmtType)); + return ALC_INVALID_ENUM; + + case DevFmtUByte: + case DevFmtShort: + case DevFmtInt: + case DevFmtFloat: + break; + } + + WAVEFORMATEXTENSIBLE InputType{}; + switch(mDevice->FmtChans) + { + case DevFmtMono: + InputType.dwChannelMask = SPEAKER_FRONT_CENTER; + break; + case DevFmtStereo: + InputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT; + break; + case DevFmtQuad: + InputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_BACK_LEFT | + SPEAKER_BACK_RIGHT; + break; + case DevFmtX51: + InputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_FRONT_CENTER | + SPEAKER_LOW_FREQUENCY | + SPEAKER_SIDE_LEFT | + SPEAKER_SIDE_RIGHT; + break; + case DevFmtX51Rear: + InputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_FRONT_CENTER | + SPEAKER_LOW_FREQUENCY | + SPEAKER_BACK_LEFT | + SPEAKER_BACK_RIGHT; + break; + case DevFmtX61: + InputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_FRONT_CENTER | + SPEAKER_LOW_FREQUENCY | + SPEAKER_BACK_CENTER | + SPEAKER_SIDE_LEFT | + SPEAKER_SIDE_RIGHT; + break; + case DevFmtX71: + InputType.dwChannelMask = SPEAKER_FRONT_LEFT | + SPEAKER_FRONT_RIGHT | + SPEAKER_FRONT_CENTER | + SPEAKER_LOW_FREQUENCY | + SPEAKER_BACK_LEFT | + SPEAKER_BACK_RIGHT | + SPEAKER_SIDE_LEFT | + SPEAKER_SIDE_RIGHT; + break; + case DevFmtAmbi3D: + WARN("%s capture not supported\n", DevFmtChannelsString(mDevice->FmtChans)); + return ALC_INVALID_ENUM; + } + + InputType.Format.wFormatTag = WAVE_FORMAT_PCM; + InputType.Format.nChannels = mDevice->channelsFromFmt(); + InputType.Format.wBitsPerSample = mDevice->bytesFromFmt() * 8; + InputType.Format.nBlockAlign = 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); + } + + ALuint 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, nullptr); + if(SUCCEEDED(hr)) + mDSC->CreateCaptureBuffer(&DSCBDescription, &mDSCbuffer, nullptr); + if(SUCCEEDED(hr)) + { + mRing = CreateRingBuffer(mDevice->BufferSize, InputType.Format.nBlockAlign, false); + if(!mRing) hr = DSERR_OUTOFMEMORY; + } + + if(FAILED(hr)) + { + ERR("Device init failed: 0x%08lx\n", hr); + + mRing = nullptr; + if(mDSCbuffer) + mDSCbuffer->Release(); + mDSCbuffer = nullptr; + if(mDSC) + mDSC->Release(); + mDSC = nullptr; + + return ALC_INVALID_VALUE; + } + + mBufferBytes = DSCBDescription.dwBufferBytes; + SetDefaultWFXChannelOrder(mDevice); + + mDevice->DeviceName = name; + return ALC_NO_ERROR; +} + +ALCboolean DSoundCapture::start() +{ + HRESULT hr{mDSCbuffer->Start(DSCBSTART_LOOPING)}; + if(FAILED(hr)) + { + ERR("start failed: 0x%08lx\n", hr); + aluHandleDisconnect(mDevice, "Failure starting capture: 0x%lx", hr); + return ALC_FALSE; + } + return ALC_TRUE; +} + +void DSoundCapture::stop() +{ + HRESULT hr{mDSCbuffer->Stop()}; + if(FAILED(hr)) + { + ERR("stop failed: 0x%08lx\n", hr); + aluHandleDisconnect(mDevice, "Failure stopping capture: 0x%lx", hr); + } +} + +ALCenum DSoundCapture::captureSamples(void *buffer, ALCuint samples) +{ + mRing->read(buffer, samples); + return ALC_NO_ERROR; +} + +ALCuint DSoundCapture::availableSamples() +{ + if(!mDevice->Connected.load(std::memory_order_acquire)) + return static_cast<ALCuint>(mRing->readSpace()); + + ALsizei FrameSize{mDevice->frameSizeFromFmt()}; + DWORD BufferBytes{mBufferBytes}; + DWORD LastCursor{mCursor}; + + DWORD ReadCursor; + void *ReadPtr1, *ReadPtr2; + DWORD ReadCnt1, ReadCnt2; + HRESULT hr{mDSCbuffer->GetCurrentPosition(nullptr, &ReadCursor)}; + if(SUCCEEDED(hr)) + { + DWORD NumBytes{(ReadCursor-LastCursor + BufferBytes) % BufferBytes}; + if(!NumBytes) return static_cast<ALCubyte>(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 = (LastCursor+ReadCnt1+ReadCnt2) % BufferBytes; + } + + if(FAILED(hr)) + { + ERR("update failed: 0x%08lx\n", hr); + aluHandleDisconnect(mDevice, "Failure retrieving capture data: 0x%lx", hr); + } + + return static_cast<ALCuint>(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); } + +void DSoundBackendFactory::probe(DevProbe 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 DevProbe::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 DevProbe::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(); +} + +BackendPtr DSoundBackendFactory::createBackend(ALCdevice *device, BackendType type) +{ + if(type == BackendType::Playback) + return BackendPtr{new DSoundPlayback{device}}; + if(type == BackendType::Capture) + return BackendPtr{new DSoundCapture{device}}; + return nullptr; +} |