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windows: Move IMMDevice work to common file, implement DirectSound enumeration support

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This commit is contained in:
Ethan Lee 2022-07-10 12:59:33 -04:00
parent 2373da5d94
commit ae105ae1c7
12 changed files with 695 additions and 420 deletions
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2
Makefile.w32
View file

@ -73,7 +73,7 @@ SRCS+= SDL_locale.c SDL_syslocale.c
SRCS+= SDL_url.c SDL_sysurl.c
SRCS+= SDL_winmm.c SDL_directsound.c SDL_wasapi.c SDL_wasapi_win32.c
SRCS+= SDL_hid.c SDL_windows.c SDL_xinput.c
SRCS+= SDL_hid.c SDL_immdevice.c SDL_windows.c SDL_xinput.c
SRCS+= SDL_dinputhaptic.c SDL_windowshaptic.c SDL_xinputhaptic.c
SRCS+= SDL_dinputjoystick.c SDL_rawinputjoystick.c SDL_windowsjoystick.c SDL_windows_gaming_input.c SDL_xinputjoystick.c
SRCS+= SDL_syspower.c

2
VisualC-GDK/SDL/SDL.vcxproj
View file

@ -382,6 +382,7 @@
<ClInclude Include="..\..\src\core\gdk\SDL_gdk.h" />
<ClInclude Include="..\..\src\core\windows\SDL_directx.h" />
<ClInclude Include="..\..\src\core\windows\SDL_hid.h" />
<ClInclude Include="..\..\src\core\windows\SDL_immdevice.h" />
<ClInclude Include="..\..\src\core\windows\SDL_windows.h" />
<ClInclude Include="..\..\src\core\windows\SDL_xinput.h" />
<ClInclude Include="..\..\src\dynapi\SDL_dynapi.h" />
@ -538,6 +539,7 @@
<ClCompile Include="..\..\src\audio\wasapi\SDL_wasapi.c" />
<ClCompile Include="..\..\src\audio\wasapi\SDL_wasapi_win32.c" />
<ClCompile Include="..\..\src\core\windows\SDL_hid.c" />
<ClCompile Include="..\..\src\core\windows\SDL_immdevice.c" />
<ClCompile Include="..\..\src\core\windows\SDL_windows.c" />
<ClCompile Include="..\..\src\core\windows\SDL_xinput.c">
<CompileAs Condition="'$(Configuration)|$(Platform)'=='Debug|Gaming.Xbox.Scarlett.x64'">CompileAsCpp</CompileAs>

6
VisualC-GDK/SDL/SDL.vcxproj.filters
View file

@ -432,6 +432,9 @@
<ClInclude Include="..\..\src\core\windows\SDL_hid.h">
<Filter>core\windows</Filter>
</ClInclude>
<ClInclude Include="..\..\src\core\windows\SDL_immdevice.h">
<Filter>core\windows</Filter>
</ClInclude>
<ClInclude Include="..\..\src\core\windows\SDL_windows.h">
<Filter>core\windows</Filter>
</ClInclude>
@ -876,6 +879,9 @@
<ClCompile Include="..\..\src\core\windows\SDL_hid.c">
<Filter>core\windows</Filter>
</ClCompile>
<ClCompile Include="..\..\src\core\windows\SDL_immdevice.c">
<Filter>core\windows</Filter>
</ClCompile>
<ClCompile Include="..\..\src\core\windows\SDL_windows.c">
<Filter>core\windows</Filter>
</ClCompile>

2
VisualC/SDL/SDL.vcxproj
View file

@ -305,6 +305,7 @@
<ClInclude Include="..\..\src\audio\winmm\SDL_winmm.h" />
<ClInclude Include="..\..\src\core\windows\SDL_directx.h" />
<ClInclude Include="..\..\src\core\windows\SDL_hid.h" />
<ClInclude Include="..\..\src\core\windows\SDL_immdevice.h" />
<ClInclude Include="..\..\src\core\windows\SDL_windows.h" />
<ClInclude Include="..\..\src\core\windows\SDL_xinput.h" />
<ClInclude Include="..\..\src\dynapi\SDL_dynapi.h" />
@ -456,6 +457,7 @@
<ClCompile Include="..\..\src\audio\wasapi\SDL_wasapi.c" />
<ClCompile Include="..\..\src\audio\wasapi\SDL_wasapi_win32.c" />
<ClCompile Include="..\..\src\core\windows\SDL_hid.c" />
<ClCompile Include="..\..\src\core\windows\SDL_immdevice.c" />
<ClCompile Include="..\..\src\core\windows\SDL_windows.c" />
<ClCompile Include="..\..\src\core\windows\SDL_xinput.c" />
<ClCompile Include="..\..\src\cpuinfo\SDL_cpuinfo.c" />

6
VisualC/SDL/SDL.vcxproj.filters
View file

@ -432,6 +432,9 @@
<ClInclude Include="..\..\src\core\windows\SDL_hid.h">
<Filter>core\windows</Filter>
</ClInclude>
<ClInclude Include="..\..\src\core\windows\SDL_immdevice.h">
<Filter>core\windows</Filter>
</ClInclude>
<ClInclude Include="..\..\src\core\windows\SDL_windows.h">
<Filter>core\windows</Filter>
</ClInclude>
@ -869,6 +872,9 @@
<ClCompile Include="..\..\src\core\windows\SDL_hid.c">
<Filter>core\windows</Filter>
</ClCompile>
<ClCompile Include="..\..\src\core\windows\SDL_immdevice.c">
<Filter>core\windows</Filter>
</ClCompile>
<ClCompile Include="..\..\src\core\windows\SDL_windows.c">
<Filter>core\windows</Filter>
</ClCompile>

30
src/audio/directsound/SDL_directsound.c
View file

@ -29,11 +29,19 @@
#include "SDL_audio.h"
#include "../SDL_audio_c.h"
#include "SDL_directsound.h"
#if HAVE_MMDEVICEAPI_H
#include "../../core/windows/SDL_immdevice.h"
#endif /* HAVE_MMDEVICEAPI_H */
#ifndef WAVE_FORMAT_IEEE_FLOAT
#define WAVE_FORMAT_IEEE_FLOAT 0x0003
#endif
/* For Vista+, we can enumerate DSound devices with IMMDevice */
#if HAVE_MMDEVICEAPI_H
static SDL_bool SupportsIMMDevice = SDL_FALSE;
#endif /* HAVE_MMDEVICEAPI_H */
/* DirectX function pointers for audio */
static void* DSoundDLL = NULL;
typedef HRESULT (WINAPI *fnDirectSoundCreate8)(LPGUID,LPDIRECTSOUND*,LPUNKNOWN);
@ -172,8 +180,16 @@ FindAllDevs(LPGUID guid, LPCWSTR desc, LPCWSTR module, LPVOID data)
static void
DSOUND_DetectDevices(void)
{
pDirectSoundCaptureEnumerateW(FindAllDevs, (void *) ((size_t) 1));
pDirectSoundEnumerateW(FindAllDevs, (void *) ((size_t) 0));
#if HAVE_MMDEVICEAPI_H
if (SupportsIMMDevice) {
SDL_IMMDevice_EnumerateEndpoints(SDL_TRUE);
} else {
#endif /* HAVE_MMDEVICEAPI_H */
pDirectSoundCaptureEnumerateW(FindAllDevs, (void *)((size_t)1));
pDirectSoundEnumerateW(FindAllDevs, (void *)((size_t)0));
#if HAVE_MMDEVICEAPI_H
}
#endif /* HAVE_MMDEVICEAPI_H*/
}
@ -567,6 +583,12 @@ DSOUND_OpenDevice(_THIS, const char *devname)
static void
DSOUND_Deinitialize(void)
{
#if HAVE_MMDEVICEAPI_H
if (SupportsIMMDevice) {
SDL_IMMDevice_Quit();
SupportsIMMDevice = SDL_FALSE;
}
#endif /* HAVE_MMDEVICEAPI_H */
DSOUND_Unload();
}
@ -578,6 +600,10 @@ DSOUND_Init(SDL_AudioDriverImpl * impl)
return SDL_FALSE;
}
#if HAVE_MMDEVICEAPI_H
SupportsIMMDevice = !(SDL_IMMDevice_Init() < 0);
#endif /* HAVE_MMDEVICEAPI_H */
/* Set the function pointers */
impl->DetectDevices = DSOUND_DetectDevices;
impl->OpenDevice = DSOUND_OpenDevice;

102
src/audio/wasapi/SDL_wasapi.c
View file

@ -23,13 +23,13 @@
#if SDL_AUDIO_DRIVER_WASAPI
#include "../../core/windows/SDL_windows.h"
#include "../../core/windows/SDL_immdevice.h"
#include "SDL_audio.h"
#include "SDL_timer.h"
#include "../SDL_audio_c.h"
#include "../SDL_sysaudio.h"
#define COBJMACROS
#include <mmdeviceapi.h>
#include <audioclient.h>
#include "SDL_wasapi.h"
@ -45,10 +45,6 @@
#define AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM 0x80000000
#endif
/* these increment as default devices change. Opened default devices pick up changes in their threads. */
SDL_atomic_t WASAPI_DefaultPlaybackGeneration;
SDL_atomic_t WASAPI_DefaultCaptureGeneration;
/* This is a list of device id strings we have inflight, so we have consistent pointers to the same device. */
typedef struct DevIdList
{
@ -61,93 +57,6 @@ static DevIdList *deviceid_list = NULL;
/* Some GUIDs we need to know without linking to libraries that aren't available before Vista. */
static const IID SDL_IID_IAudioRenderClient = { 0xf294acfc, 0x3146, 0x4483,{ 0xa7, 0xbf, 0xad, 0xdc, 0xa7, 0xc2, 0x60, 0xe2 } };
static const IID SDL_IID_IAudioCaptureClient = { 0xc8adbd64, 0xe71e, 0x48a0,{ 0xa4, 0xde, 0x18, 0x5c, 0x39, 0x5c, 0xd3, 0x17 } };
static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
void
WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid)
{
DevIdList *i;
DevIdList *next;
DevIdList *prev = NULL;
for (i = deviceid_list; i; i = next) {
next = i->next;
if (SDL_wcscmp(i->str, devid) == 0) {
if (prev) {
prev->next = next;
} else {
deviceid_list = next;
}
SDL_RemoveAudioDevice(iscapture, i->str);
SDL_free(i->str);
SDL_free(i);
}
prev = i;
}
}
static SDL_AudioFormat
WaveFormatToSDLFormat(WAVEFORMATEX *waveformat)
{
if ((waveformat->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_F32SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 16)) {
return AUDIO_S16SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_S32SYS;
} else if (waveformat->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
const WAVEFORMATEXTENSIBLE *ext = (const WAVEFORMATEXTENSIBLE *) waveformat;
if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_F32SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 16)) {
return AUDIO_S16SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_S32SYS;
}
}
return 0;
}
void
WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, WAVEFORMATEXTENSIBLE *fmt, LPCWSTR devid)
{
DevIdList *devidlist;
SDL_AudioSpec spec;
/* You can have multiple endpoints on a device that are mutually exclusive ("Speakers" vs "Line Out" or whatever).
In a perfect world, things that are unplugged won't be in this collection. The only gotcha is probably for
phones and tablets, where you might have an internal speaker and a headphone jack and expect both to be
available and switch automatically. (!!! FIXME...?) */
/* see if we already have this one. */
for (devidlist = deviceid_list; devidlist; devidlist = devidlist->next) {
if (SDL_wcscmp(devidlist->str, devid) == 0) {
return; /* we already have this. */
}
}
devidlist = (DevIdList *) SDL_malloc(sizeof (*devidlist));
if (!devidlist) {
return; /* oh well. */
}
devid = SDL_wcsdup(devid);
if (!devid) {
SDL_free(devidlist);
return; /* oh well. */
}
devidlist->str = (WCHAR *) devid;
devidlist->next = deviceid_list;
deviceid_list = devidlist;
SDL_zero(spec);
spec.channels = (Uint8)fmt->Format.nChannels;
spec.freq = fmt->Format.nSamplesPerSec;
spec.format = WaveFormatToSDLFormat((WAVEFORMATEX *) fmt);
SDL_AddAudioDevice(iscapture, devname, &spec, (void *) devid);
}
static void
WASAPI_DetectDevices(void)
@ -235,7 +144,7 @@ RecoverWasapiDevice(_THIS)
ReleaseWasapiDevice(this); /* dump the lost device's handles. */
if (this->hidden->default_device_generation) {
this->hidden->default_device_generation = SDL_AtomicGet(this->iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration);
this->hidden->default_device_generation = SDL_AtomicGet(this->iscapture ? &SDL_IMMDevice_DefaultCaptureGeneration : &SDL_IMMDevice_DefaultPlaybackGeneration);
}
/* this can fail for lots of reasons, but the most likely is we had a
@ -268,7 +177,7 @@ RecoverWasapiIfLost(_THIS)
}
if (!lost && (generation > 0)) { /* is a default device? */
const int newgen = SDL_AtomicGet(this->iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration);
const int newgen = SDL_AtomicGet(this->iscapture ? &SDL_IMMDevice_DefaultCaptureGeneration : &SDL_IMMDevice_DefaultPlaybackGeneration);
if (generation != newgen) { /* the desired default device was changed, jump over to it. */
lost = SDL_TRUE;
}
@ -655,7 +564,7 @@ WASAPI_OpenDevice(_THIS, const char *devname)
WASAPI_RefDevice(this); /* so CloseDevice() will unref to zero. */
if (!devid) { /* is default device? */
this->hidden->default_device_generation = SDL_AtomicGet(this->iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration);
this->hidden->default_device_generation = SDL_AtomicGet(this->iscapture ? &SDL_IMMDevice_DefaultCaptureGeneration : &SDL_IMMDevice_DefaultPlaybackGeneration);
} else {
this->hidden->devid = SDL_wcsdup(devid);
if (!this->hidden->devid) {
@ -709,9 +618,6 @@ WASAPI_Deinitialize(void)
static SDL_bool
WASAPI_Init(SDL_AudioDriverImpl * impl)
{
SDL_AtomicSet(&WASAPI_DefaultPlaybackGeneration, 1);
SDL_AtomicSet(&WASAPI_DefaultCaptureGeneration, 1);
if (WASAPI_PlatformInit() == -1) {
return SDL_FALSE;
}

6
src/audio/wasapi/SDL_wasapi.h
View file

@ -55,16 +55,10 @@ struct SDL_PrivateAudioData
SDL_atomic_t just_activated;
};
/* these increment as default devices change. Opened default devices pick up changes in their threads. */
extern SDL_atomic_t WASAPI_DefaultPlaybackGeneration;
extern SDL_atomic_t WASAPI_DefaultCaptureGeneration;
/* win32 and winrt implementations call into these. */
int WASAPI_PrepDevice(_THIS, const SDL_bool updatestream);
void WASAPI_RefDevice(_THIS);
void WASAPI_UnrefDevice(_THIS);
void WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, WAVEFORMATEXTENSIBLE *fmt, LPCWSTR devid);
void WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid);
/* These are functions that are implemented differently for Windows vs WinRT. */
int WASAPI_PlatformInit(void);

318
src/audio/wasapi/SDL_wasapi_win32.c
View file

@ -29,28 +29,16 @@
#if SDL_AUDIO_DRIVER_WASAPI && !defined(__WINRT__)
#include "../../core/windows/SDL_windows.h"
#include "../../core/windows/SDL_immdevice.h"
#include "SDL_audio.h"
#include "SDL_timer.h"
#include "../SDL_audio_c.h"
#include "../SDL_sysaudio.h"
#define COBJMACROS
#include <mmdeviceapi.h>
#include <audioclient.h>
#include "SDL_wasapi.h"
static const ERole SDL_WASAPI_role = eConsole; /* !!! FIXME: should this be eMultimedia? Should be a hint? */
/* This is global to the WASAPI target, to handle hotplug and default device lookup. */
static IMMDeviceEnumerator *enumerator = NULL;
/* PropVariantInit() is an inline function/macro in PropIdl.h that calls the C runtime's memset() directly. Use ours instead, to avoid dependency. */
#ifdef PropVariantInit
#undef PropVariantInit
#endif
#define PropVariantInit(p) SDL_zerop(p)
/* handle to Avrt.dll--Vista and later!--for flagging the callback thread as "Pro Audio" (low latency). */
static HMODULE libavrt = NULL;
typedef HANDLE(WINAPI *pfnAvSetMmThreadCharacteristicsW)(LPCWSTR, LPDWORD);
@ -59,203 +47,13 @@ static pfnAvSetMmThreadCharacteristicsW pAvSetMmThreadCharacteristicsW = NULL;
static pfnAvRevertMmThreadCharacteristics pAvRevertMmThreadCharacteristics = NULL;
/* Some GUIDs we need to know without linking to libraries that aren't available before Vista. */
static const CLSID SDL_CLSID_MMDeviceEnumerator = { 0xbcde0395, 0xe52f, 0x467c,{ 0x8e, 0x3d, 0xc4, 0x57, 0x92, 0x91, 0x69, 0x2e } };
static const IID SDL_IID_IMMDeviceEnumerator = { 0xa95664d2, 0x9614, 0x4f35,{ 0xa7, 0x46, 0xde, 0x8d, 0xb6, 0x36, 0x17, 0xe6 } };
static const IID SDL_IID_IMMNotificationClient = { 0x7991eec9, 0x7e89, 0x4d85,{ 0x83, 0x90, 0x6c, 0x70, 0x3c, 0xec, 0x60, 0xc0 } };
static const IID SDL_IID_IMMEndpoint = { 0x1be09788, 0x6894, 0x4089,{ 0x85, 0x86, 0x9a, 0x2a, 0x6c, 0x26, 0x5a, 0xc5 } };
static const IID SDL_IID_IAudioClient = { 0x1cb9ad4c, 0xdbfa, 0x4c32,{ 0xb1, 0x78, 0xc2, 0xf5, 0x68, 0xa7, 0x03, 0xb2 } };
static const PROPERTYKEY SDL_PKEY_Device_FriendlyName = { { 0xa45c254e, 0xdf1c, 0x4efd,{ 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, } }, 14 };
static const PROPERTYKEY SDL_PKEY_AudioEngine_DeviceFormat = { { 0xf19f064d, 0x82c, 0x4e27,{ 0xbc, 0x73, 0x68, 0x82, 0xa1, 0xbb, 0x8e, 0x4c, } }, 0 };
static void
GetWasapiDeviceInfo(IMMDevice *device, char **utf8dev, WAVEFORMATEXTENSIBLE *fmt)
{
/* PKEY_Device_FriendlyName gives you "Speakers (SoundBlaster Pro)" which drives me nuts. I'd rather it be
"SoundBlaster Pro (Speakers)" but I guess that's developers vs users. Windows uses the FriendlyName in
its own UIs, like Volume Control, etc. */
IPropertyStore *props = NULL;
*utf8dev = NULL;
SDL_zerop(fmt);
if (SUCCEEDED(IMMDevice_OpenPropertyStore(device, STGM_READ, &props))) {
PROPVARIANT var;
PropVariantInit(&var);
if (SUCCEEDED(IPropertyStore_GetValue(props, &SDL_PKEY_Device_FriendlyName, &var))) {
*utf8dev = WIN_StringToUTF8W(var.pwszVal);
}
PropVariantClear(&var);
if (SUCCEEDED(IPropertyStore_GetValue(props, &SDL_PKEY_AudioEngine_DeviceFormat, &var))) {
SDL_memcpy(fmt, var.blob.pBlobData, SDL_min(var.blob.cbSize, sizeof(WAVEFORMATEXTENSIBLE)));
}
PropVariantClear(&var);
IPropertyStore_Release(props);
}
}
/* We need a COM subclass of IMMNotificationClient for hotplug support, which is
easy in C++, but we have to tapdance more to make work in C.
Thanks to this page for coaching on how to make this work:
https://www.codeproject.com/Articles/13601/COM-in-plain-C */
typedef struct SDLMMNotificationClient
{
const IMMNotificationClientVtbl *lpVtbl;
SDL_atomic_t refcount;
} SDLMMNotificationClient;
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_QueryInterface(IMMNotificationClient *this, REFIID iid, void **ppv)
{
if ((WIN_IsEqualIID(iid, &IID_IUnknown)) || (WIN_IsEqualIID(iid, &SDL_IID_IMMNotificationClient)))
{
*ppv = this;
this->lpVtbl->AddRef(this);
return S_OK;
}
*ppv = NULL;
return E_NOINTERFACE;
}
static ULONG STDMETHODCALLTYPE
SDLMMNotificationClient_AddRef(IMMNotificationClient *ithis)
{
SDLMMNotificationClient *this = (SDLMMNotificationClient *) ithis;
return (ULONG) (SDL_AtomicIncRef(&this->refcount) + 1);
}
static ULONG STDMETHODCALLTYPE
SDLMMNotificationClient_Release(IMMNotificationClient *ithis)
{
/* this is a static object; we don't ever free it. */
SDLMMNotificationClient *this = (SDLMMNotificationClient *) ithis;
const ULONG retval = SDL_AtomicDecRef(&this->refcount);
if (retval == 0) {
SDL_AtomicSet(&this->refcount, 0); /* uhh... */
return 0;
}
return retval - 1;
}
/* These are the entry points called when WASAPI device endpoints change. */
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnDefaultDeviceChanged(IMMNotificationClient *ithis, EDataFlow flow, ERole role, LPCWSTR pwstrDeviceId)
{
if (role != SDL_WASAPI_role) {
return S_OK; /* ignore it. */
}
/* Increment the "generation," so opened devices will pick this up in their threads. */
switch (flow) {
case eRender:
SDL_AtomicAdd(&WASAPI_DefaultPlaybackGeneration, 1);
break;
case eCapture:
SDL_AtomicAdd(&WASAPI_DefaultCaptureGeneration, 1);
break;
case eAll:
SDL_AtomicAdd(&WASAPI_DefaultPlaybackGeneration, 1);
SDL_AtomicAdd(&WASAPI_DefaultCaptureGeneration, 1);
break;
default:
SDL_assert(!"uhoh, unexpected OnDefaultDeviceChange flow!");
break;
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnDeviceAdded(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId)
{
/* we ignore this; devices added here then progress to ACTIVE, if appropriate, in
OnDeviceStateChange, making that a better place to deal with device adds. More
importantly: the first time you plug in a USB audio device, this callback will
fire, but when you unplug it, it isn't removed (it's state changes to NOTPRESENT).
Plugging it back in won't fire this callback again. */
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnDeviceRemoved(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId)
{
/* See notes in OnDeviceAdded handler about why we ignore this. */
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnDeviceStateChanged(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId, DWORD dwNewState)
{
IMMDevice *device = NULL;
if (SUCCEEDED(IMMDeviceEnumerator_GetDevice(enumerator, pwstrDeviceId, &device))) {
IMMEndpoint *endpoint = NULL;
if (SUCCEEDED(IMMDevice_QueryInterface(device, &SDL_IID_IMMEndpoint, (void **) &endpoint))) {
EDataFlow flow;
if (SUCCEEDED(IMMEndpoint_GetDataFlow(endpoint, &flow))) {
const SDL_bool iscapture = (flow == eCapture);
if (dwNewState == DEVICE_STATE_ACTIVE) {
char *utf8dev;
WAVEFORMATEXTENSIBLE fmt;
GetWasapiDeviceInfo(device, &utf8dev, &fmt);
if (utf8dev) {
WASAPI_AddDevice(iscapture, utf8dev, &fmt, pwstrDeviceId);
SDL_free(utf8dev);
}
} else {
WASAPI_RemoveDevice(iscapture, pwstrDeviceId);
}
}
IMMEndpoint_Release(endpoint);
}
IMMDevice_Release(device);
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnPropertyValueChanged(IMMNotificationClient *this, LPCWSTR pwstrDeviceId, const PROPERTYKEY key)
{
return S_OK; /* we don't care about these. */
}
static const IMMNotificationClientVtbl notification_client_vtbl = {
SDLMMNotificationClient_QueryInterface,
SDLMMNotificationClient_AddRef,
SDLMMNotificationClient_Release,
SDLMMNotificationClient_OnDeviceStateChanged,
SDLMMNotificationClient_OnDeviceAdded,
SDLMMNotificationClient_OnDeviceRemoved,
SDLMMNotificationClient_OnDefaultDeviceChanged,
SDLMMNotificationClient_OnPropertyValueChanged
};
static SDLMMNotificationClient notification_client = { &notification_client_vtbl, { 1 } };
int
WASAPI_PlatformInit(void)
{
HRESULT ret;
/* just skip the discussion with COM here. */
if (!WIN_IsWindowsVistaOrGreater()) {
return SDL_SetError("WASAPI support requires Windows Vista or later");
}
if (FAILED(WIN_CoInitialize())) {
return SDL_SetError("WASAPI: CoInitialize() failed");
}
ret = CoCreateInstance(&SDL_CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER, &SDL_IID_IMMDeviceEnumerator, (LPVOID *) &enumerator);
if (FAILED(ret)) {
WIN_CoUninitialize();
return WIN_SetErrorFromHRESULT("WASAPI CoCreateInstance(MMDeviceEnumerator)", ret);
if (SDL_IMMDevice_Init() < 0) {
return -1; /* This is set by SDL_IMMDevice_Init */
}
libavrt = LoadLibrary(TEXT("avrt.dll")); /* this library is available in Vista and later. No WinXP, so have to LoadLibrary to use it for now! */
@ -270,11 +68,7 @@ WASAPI_PlatformInit(void)
void
WASAPI_PlatformDeinit(void)
{
if (enumerator) {
IMMDeviceEnumerator_UnregisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *) &notification_client);
IMMDeviceEnumerator_Release(enumerator);
enumerator = NULL;
}
SDL_IMMDevice_Quit();
if (libavrt) {
FreeLibrary(libavrt);
@ -320,21 +114,12 @@ WASAPI_PlatformThreadDeinit(_THIS)
int
WASAPI_ActivateDevice(_THIS, const SDL_bool isrecovery)
{
LPCWSTR devid = this->hidden->devid;
IMMDevice *device = NULL;
HRESULT ret;
if (devid == NULL) {
const EDataFlow dataflow = this->iscapture ? eCapture : eRender;
ret = IMMDeviceEnumerator_GetDefaultAudioEndpoint(enumerator, dataflow, SDL_WASAPI_role, &device);
} else {
ret = IMMDeviceEnumerator_GetDevice(enumerator, devid, &device);
}
if (FAILED(ret)) {
SDL_assert(device == NULL);
if (SDL_IMMDevice_Get(this->hidden->devid, &device, this->iscapture) < 0) {
this->hidden->client = NULL;
return WIN_SetErrorFromHRESULT("WASAPI can't find requested audio endpoint", ret);
return -1; /* This is already set by SDL_IMMDevice_Get */
}
/* this is not async in standard win32, yay! */
@ -354,99 +139,10 @@ WASAPI_ActivateDevice(_THIS, const SDL_bool isrecovery)
return 0; /* good to go. */
}
typedef struct
{
LPWSTR devid;
char *devname;
WAVEFORMATEXTENSIBLE fmt;
} EndpointItem;
static int SDLCALL sort_endpoints(const void *_a, const void *_b)
{
LPWSTR a = ((const EndpointItem *) _a)->devid;
LPWSTR b = ((const EndpointItem *) _b)->devid;
if (!a && b) {
return -1;
} else if (a && !b) {
return 1;
}
while (SDL_TRUE) {
if (*a < *b) {
return -1;
} else if (*a > *b) {
return 1;
} else if (*a == 0) {
break;
}
a++;
b++;
}
return 0;
}
static void
WASAPI_EnumerateEndpointsForFlow(const SDL_bool iscapture)
{
IMMDeviceCollection *collection = NULL;
EndpointItem *items;
UINT i, total;
/* Note that WASAPI separates "adapter devices" from "audio endpoint devices"
...one adapter device ("SoundBlaster Pro") might have multiple endpoint devices ("Speakers", "Line-Out"). */
if (FAILED(IMMDeviceEnumerator_EnumAudioEndpoints(enumerator, iscapture ? eCapture : eRender, DEVICE_STATE_ACTIVE, &collection))) {
return;
}
if (FAILED(IMMDeviceCollection_GetCount(collection, &total))) {
IMMDeviceCollection_Release(collection);
return;
}
items = (EndpointItem *) SDL_calloc(total, sizeof (EndpointItem));
if (!items) {
return; /* oh well. */
}
for (i = 0; i < total; i++) {
EndpointItem *item = items + i;
IMMDevice *device = NULL;
if (SUCCEEDED(IMMDeviceCollection_Item(collection, i, &device))) {
if (SUCCEEDED(IMMDevice_GetId(device, &item->devid))) {
GetWasapiDeviceInfo(device, &item->devname, &item->fmt);
}
IMMDevice_Release(device);
}
}
/* sort the list of devices by their guid so list is consistent between runs */
SDL_qsort(items, total, sizeof (*items), sort_endpoints);
/* Send the sorted list on to the SDL's higher level. */
for (i = 0; i < total; i++) {
EndpointItem *item = items + i;
if ((item->devid) && (item->devname)) {
WASAPI_AddDevice(iscapture, item->devname, &item->fmt, item->devid);
}
SDL_free(item->devname);
CoTaskMemFree(item->devid);
}
SDL_free(items);
IMMDeviceCollection_Release(collection);
}
void
WASAPI_EnumerateEndpoints(void)
{
WASAPI_EnumerateEndpointsForFlow(SDL_FALSE); /* playback */
WASAPI_EnumerateEndpointsForFlow(SDL_TRUE); /* capture */
/* if this fails, we just won't get hotplug events. Carry on anyhow. */
IMMDeviceEnumerator_RegisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *) &notification_client);
SDL_IMMDevice_EnumerateEndpoints(SDL_FALSE);
}
void

112
src/audio/wasapi/SDL_wasapi_winrt.cpp
View file

@ -55,6 +55,13 @@ using namespace Microsoft::WRL;
static Platform::String^ SDL_PKEY_AudioEngine_DeviceFormat = L"{f19f064d-082c-4e27-bc73-6882a1bb8e4c} 0";
static void WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, WAVEFORMATEXTENSIBLE *fmt, LPCWSTR devid);
static void WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid);
extern "C" {
SDL_atomic_t SDL_IMMDevice_DefaultPlaybackGeneration;
SDL_atomic_t SDL_IMMDevice_DefaultCaptureGeneration;
}
class SDL_WasapiDeviceEventHandler
{
public:
@ -174,14 +181,14 @@ void
SDL_WasapiDeviceEventHandler::OnDefaultRenderDeviceChanged(Platform::Object^ sender, DefaultAudioRenderDeviceChangedEventArgs^ args)
{
SDL_assert(this->iscapture);
SDL_AtomicAdd(&WASAPI_DefaultPlaybackGeneration, 1);
SDL_AtomicAdd(&SDL_IMMDevice_DefaultPlaybackGeneration, 1);
}
void
SDL_WasapiDeviceEventHandler::OnDefaultCaptureDeviceChanged(Platform::Object^ sender, DefaultAudioCaptureDeviceChangedEventArgs^ args)
{
SDL_assert(!this->iscapture);
SDL_AtomicAdd(&WASAPI_DefaultCaptureGeneration, 1);
SDL_AtomicAdd(&SDL_IMMDevice_DefaultCaptureGeneration, 1);
}
@ -190,6 +197,8 @@ static SDL_WasapiDeviceEventHandler *capture_device_event_handler;
int WASAPI_PlatformInit(void)
{
SDL_AtomicSet(&SDL_IMMDevice_DefaultPlaybackGeneration, 1);
SDL_AtomicSet(&SDL_IMMDevice_DefaultCaptureGeneration, 1);
return 0;
}
@ -317,6 +326,105 @@ WASAPI_PlatformThreadDeinit(_THIS)
// !!! FIXME: set this thread to "Pro Audio" priority.
}
/* Everything below was copied from SDL_wasapi.c, before it got moved to SDL_immdevice.c! */
static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
extern "C" SDL_AudioFormat
WaveFormatToSDLFormat(WAVEFORMATEX *waveformat)
{
if ((waveformat->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_F32SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 16)) {
return AUDIO_S16SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_S32SYS;
} else if (waveformat->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
const WAVEFORMATEXTENSIBLE *ext = (const WAVEFORMATEXTENSIBLE *)waveformat;
if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof(GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_F32SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof(GUID)) == 0) && (waveformat->wBitsPerSample == 16)) {
return AUDIO_S16SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof(GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_S32SYS;
}
}
return 0;
}
/* This is a list of device id strings we have inflight, so we have consistent pointers to the same device. */
typedef struct DevIdList
{
WCHAR *str;
struct DevIdList *next;
} DevIdList;
static DevIdList *deviceid_list = NULL;
static void
WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid)
{
DevIdList *i;
DevIdList *next;
DevIdList *prev = NULL;
for (i = deviceid_list; i; i = next) {
next = i->next;
if (SDL_wcscmp(i->str, devid) == 0) {
if (prev) {
prev->next = next;
}
else {
deviceid_list = next;
}
SDL_RemoveAudioDevice(iscapture, i->str);
SDL_free(i->str);
SDL_free(i);
}
prev = i;
}
}
static void
WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, WAVEFORMATEXTENSIBLE *fmt, LPCWSTR devid)
{
DevIdList *devidlist;
SDL_AudioSpec spec;
/* You can have multiple endpoints on a device that are mutually exclusive ("Speakers" vs "Line Out" or whatever).
In a perfect world, things that are unplugged won't be in this collection. The only gotcha is probably for
phones and tablets, where you might have an internal speaker and a headphone jack and expect both to be
available and switch automatically. (!!! FIXME...?) */
/* see if we already have this one. */
for (devidlist = deviceid_list; devidlist; devidlist = devidlist->next) {
if (SDL_wcscmp(devidlist->str, devid) == 0) {
return; /* we already have this. */
}
}
devidlist = (DevIdList *)SDL_malloc(sizeof(*devidlist));
if (!devidlist) {
return; /* oh well. */
}
devid = SDL_wcsdup(devid);
if (!devid) {
SDL_free(devidlist);
return; /* oh well. */
}
devidlist->str = (WCHAR *)devid;
devidlist->next = deviceid_list;
deviceid_list = devidlist;
SDL_zero(spec);
spec.channels = (Uint8)fmt->Format.nChannels;
spec.freq = fmt->Format.nSamplesPerSec;
spec.format = WaveFormatToSDLFormat((WAVEFORMATEX *)fmt);
SDL_AddAudioDevice(iscapture, devname, &spec, (void *)devid);
}
#endif // SDL_AUDIO_DRIVER_WASAPI && defined(__WINRT__)
/* vi: set ts=4 sw=4 expandtab: */

486
src/core/windows/SDL_immdevice.c Normal file
View file

@ -0,0 +1,486 @@
/*
Simple DirectMedia Layer
Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if (defined(__WIN32__) || defined(__GDK__)) && HAVE_MMDEVICEAPI_H
#include "SDL_windows.h"
#include "SDL_immdevice.h"
#include "../../audio/SDL_sysaudio.h"
#include <objbase.h> /* For CLSIDFromString */
static const ERole SDL_IMMDevice_role = eConsole; /* !!! FIXME: should this be eMultimedia? Should be a hint? */
/* This is global to the WASAPI target, to handle hotplug and default device lookup. */
static IMMDeviceEnumerator *enumerator = NULL;
/* PropVariantInit() is an inline function/macro in PropIdl.h that calls the C runtime's memset() directly. Use ours instead, to avoid dependency. */
#ifdef PropVariantInit
#undef PropVariantInit
#endif
#define PropVariantInit(p) SDL_zerop(p)
/* Some GUIDs we need to know without linking to libraries that aren't available before Vista. */
static const CLSID SDL_CLSID_MMDeviceEnumerator = { 0xbcde0395, 0xe52f, 0x467c,{ 0x8e, 0x3d, 0xc4, 0x57, 0x92, 0x91, 0x69, 0x2e } };
static const IID SDL_IID_IMMDeviceEnumerator = { 0xa95664d2, 0x9614, 0x4f35,{ 0xa7, 0x46, 0xde, 0x8d, 0xb6, 0x36, 0x17, 0xe6 } };
static const IID SDL_IID_IMMNotificationClient = { 0x7991eec9, 0x7e89, 0x4d85,{ 0x83, 0x90, 0x6c, 0x70, 0x3c, 0xec, 0x60, 0xc0 } };
static const IID SDL_IID_IMMEndpoint = { 0x1be09788, 0x6894, 0x4089,{ 0x85, 0x86, 0x9a, 0x2a, 0x6c, 0x26, 0x5a, 0xc5 } };
static const PROPERTYKEY SDL_PKEY_Device_FriendlyName = { { 0xa45c254e, 0xdf1c, 0x4efd,{ 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, } }, 14 };
static const PROPERTYKEY SDL_PKEY_AudioEngine_DeviceFormat = { { 0xf19f064d, 0x82c, 0x4e27,{ 0xbc, 0x73, 0x68, 0x82, 0xa1, 0xbb, 0x8e, 0x4c, } }, 0 };
static const PROPERTYKEY SDL_PKEY_AudioEndpoint_GUID = { { 0x1da5d803, 0xd492, 0x4edd,{ 0x8c, 0x23, 0xe0, 0xc0, 0xff, 0xee, 0x7f, 0x0e, } }, 4 };
static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
/* these increment as default devices change. Opened default devices pick up changes in their threads. */
SDL_atomic_t SDL_IMMDevice_DefaultPlaybackGeneration;
SDL_atomic_t SDL_IMMDevice_DefaultCaptureGeneration;
static void
GetMMDeviceInfo(IMMDevice *device, char **utf8dev, WAVEFORMATEXTENSIBLE *fmt, GUID *guid)
{
/* PKEY_Device_FriendlyName gives you "Speakers (SoundBlaster Pro)" which drives me nuts. I'd rather it be
"SoundBlaster Pro (Speakers)" but I guess that's developers vs users. Windows uses the FriendlyName in
its own UIs, like Volume Control, etc. */
IPropertyStore *props = NULL;
*utf8dev = NULL;
SDL_zerop(fmt);
if (SUCCEEDED(IMMDevice_OpenPropertyStore(device, STGM_READ, &props))) {
PROPVARIANT var;
PropVariantInit(&var);
if (SUCCEEDED(IPropertyStore_GetValue(props, &SDL_PKEY_Device_FriendlyName, &var))) {
*utf8dev = WIN_StringToUTF8W(var.pwszVal);
}
PropVariantClear(&var);
if (SUCCEEDED(IPropertyStore_GetValue(props, &SDL_PKEY_AudioEngine_DeviceFormat, &var))) {
SDL_memcpy(fmt, var.blob.pBlobData, SDL_min(var.blob.cbSize, sizeof(WAVEFORMATEXTENSIBLE)));
}
PropVariantClear(&var);
if (SUCCEEDED(IPropertyStore_GetValue(props, &SDL_PKEY_AudioEndpoint_GUID, &var))) {
CLSIDFromString(var.pwszVal, guid);
}
PropVariantClear(&var);
IPropertyStore_Release(props);
}
}
/* This is a list of device id strings we have inflight, so we have consistent pointers to the same device. */
typedef struct DevIdList
{
WCHAR *str;
LPGUID guid;
struct DevIdList *next;
} DevIdList;
static DevIdList *deviceid_list = NULL;
static void
SDL_IMMDevice_Remove(const SDL_bool iscapture, LPCWSTR devid, SDL_bool useguid)
{
DevIdList *i;
DevIdList *next;
DevIdList *prev = NULL;
for (i = deviceid_list; i; i = next) {
next = i->next;
if (SDL_wcscmp(i->str, devid) == 0) {
if (prev) {
prev->next = next;
} else {
deviceid_list = next;
}
SDL_RemoveAudioDevice(iscapture, useguid ? ((void *) i->guid) : ((void *) i->str));
SDL_free(i->str);
SDL_free(i);
}
prev = i;
}
}
static void
SDL_IMMDevice_Add(const SDL_bool iscapture, const char *devname, WAVEFORMATEXTENSIBLE *fmt, LPCWSTR devid, GUID *dsoundguid, SDL_bool useguid)
{
DevIdList *devidlist;
SDL_AudioSpec spec;
LPGUID cpyguid;
/* You can have multiple endpoints on a device that are mutually exclusive ("Speakers" vs "Line Out" or whatever).
In a perfect world, things that are unplugged won't be in this collection. The only gotcha is probably for
phones and tablets, where you might have an internal speaker and a headphone jack and expect both to be
available and switch automatically. (!!! FIXME...?) */
/* see if we already have this one. */
for (devidlist = deviceid_list; devidlist; devidlist = devidlist->next) {
if (SDL_wcscmp(devidlist->str, devid) == 0) {
return; /* we already have this. */
}
}
devidlist = (DevIdList *)SDL_malloc(sizeof(*devidlist));
if (!devidlist) {
return; /* oh well. */
}
devid = SDL_wcsdup(devid);
if (!devid) {
SDL_free(devidlist);
return; /* oh well. */
}
cpyguid = (LPGUID)SDL_malloc(sizeof(GUID));
if (!cpyguid) {
SDL_free(devidlist);
return; /* oh well. */
}
SDL_memcpy(cpyguid, dsoundguid, sizeof(GUID));
devidlist->str = (WCHAR *)devid;
devidlist->guid = cpyguid;
devidlist->next = deviceid_list;
deviceid_list = devidlist;
SDL_zero(spec);
spec.channels = (Uint8)fmt->Format.nChannels;
spec.freq = fmt->Format.nSamplesPerSec;
spec.format = WaveFormatToSDLFormat((WAVEFORMATEX *)fmt);
SDL_AddAudioDevice(iscapture, devname, &spec, useguid ? ((void *) cpyguid) : ((void *) devid));
}
/* We need a COM subclass of IMMNotificationClient for hotplug support, which is
easy in C++, but we have to tapdance more to make work in C.
Thanks to this page for coaching on how to make this work:
https://www.codeproject.com/Articles/13601/COM-in-plain-C */
typedef struct SDLMMNotificationClient
{
const IMMNotificationClientVtbl *lpVtbl;
SDL_atomic_t refcount;
SDL_bool useguid;
} SDLMMNotificationClient;
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_QueryInterface(IMMNotificationClient *this, REFIID iid, void **ppv)
{
if ((WIN_IsEqualIID(iid, &IID_IUnknown)) || (WIN_IsEqualIID(iid, &SDL_IID_IMMNotificationClient))) {
*ppv = this;
this->lpVtbl->AddRef(this);
return S_OK;
}
*ppv = NULL;
return E_NOINTERFACE;
}
static ULONG STDMETHODCALLTYPE
SDLMMNotificationClient_AddRef(IMMNotificationClient *ithis)
{
SDLMMNotificationClient *this = (SDLMMNotificationClient *)ithis;
return (ULONG)(SDL_AtomicIncRef(&this->refcount) + 1);
}
static ULONG STDMETHODCALLTYPE
SDLMMNotificationClient_Release(IMMNotificationClient *ithis)
{
/* this is a static object; we don't ever free it. */
SDLMMNotificationClient *this = (SDLMMNotificationClient *)ithis;
const ULONG retval = SDL_AtomicDecRef(&this->refcount);
if (retval == 0) {
SDL_AtomicSet(&this->refcount, 0); /* uhh... */
return 0;
}
return retval - 1;
}
/* These are the entry points called when WASAPI device endpoints change. */
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnDefaultDeviceChanged(IMMNotificationClient *ithis, EDataFlow flow, ERole role, LPCWSTR pwstrDeviceId)
{
if (role != SDL_IMMDevice_role) {
return S_OK; /* ignore it. */
}
/* Increment the "generation," so opened devices will pick this up in their threads. */
switch (flow) {
case eRender:
SDL_AtomicAdd(&SDL_IMMDevice_DefaultPlaybackGeneration, 1);
break;
case eCapture:
SDL_AtomicAdd(&SDL_IMMDevice_DefaultCaptureGeneration, 1);
break;
case eAll:
SDL_AtomicAdd(&SDL_IMMDevice_DefaultPlaybackGeneration, 1);
SDL_AtomicAdd(&SDL_IMMDevice_DefaultCaptureGeneration, 1);
break;
default:
SDL_assert(!"uhoh, unexpected OnDefaultDeviceChange flow!");
break;
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnDeviceAdded(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId)
{
/* we ignore this; devices added here then progress to ACTIVE, if appropriate, in
OnDeviceStateChange, making that a better place to deal with device adds. More
importantly: the first time you plug in a USB audio device, this callback will
fire, but when you unplug it, it isn't removed (it's state changes to NOTPRESENT).
Plugging it back in won't fire this callback again. */
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnDeviceRemoved(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId)
{
/* See notes in OnDeviceAdded handler about why we ignore this. */
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnDeviceStateChanged(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId, DWORD dwNewState)
{
IMMDevice *device = NULL;
if (SUCCEEDED(IMMDeviceEnumerator_GetDevice(enumerator, pwstrDeviceId, &device))) {
IMMEndpoint *endpoint = NULL;
if (SUCCEEDED(IMMDevice_QueryInterface(device, &SDL_IID_IMMEndpoint, (void **)&endpoint))) {
EDataFlow flow;
if (SUCCEEDED(IMMEndpoint_GetDataFlow(endpoint, &flow))) {
const SDL_bool iscapture = (flow == eCapture);
const SDLMMNotificationClient *client = (SDLMMNotificationClient*) ithis;
if (dwNewState == DEVICE_STATE_ACTIVE) {
char *utf8dev;
WAVEFORMATEXTENSIBLE fmt;
GUID dsoundguid;
GetMMDeviceInfo(device, &utf8dev, &fmt, &dsoundguid);
if (utf8dev) {
SDL_IMMDevice_Add(iscapture, utf8dev, &fmt, pwstrDeviceId, &dsoundguid, client->useguid);
SDL_free(utf8dev);
}
} else {
SDL_IMMDevice_Remove(iscapture, pwstrDeviceId, client->useguid);
}
}
IMMEndpoint_Release(endpoint);
}
IMMDevice_Release(device);
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
SDLMMNotificationClient_OnPropertyValueChanged(IMMNotificationClient *this, LPCWSTR pwstrDeviceId, const PROPERTYKEY key)
{
return S_OK; /* we don't care about these. */
}
static const IMMNotificationClientVtbl notification_client_vtbl = {
SDLMMNotificationClient_QueryInterface,
SDLMMNotificationClient_AddRef,
SDLMMNotificationClient_Release,
SDLMMNotificationClient_OnDeviceStateChanged,
SDLMMNotificationClient_OnDeviceAdded,
SDLMMNotificationClient_OnDeviceRemoved,
SDLMMNotificationClient_OnDefaultDeviceChanged,
SDLMMNotificationClient_OnPropertyValueChanged
};
static SDLMMNotificationClient notification_client = { &notification_client_vtbl, { 1 } };
int
SDL_IMMDevice_Init(void)
{
HRESULT ret;
SDL_AtomicSet(&SDL_IMMDevice_DefaultPlaybackGeneration, 1);
SDL_AtomicSet(&SDL_IMMDevice_DefaultCaptureGeneration, 1);
/* just skip the discussion with COM here. */
if (!WIN_IsWindowsVistaOrGreater()) {
return SDL_SetError("WASAPI support requires Windows Vista or later");
}
if (FAILED(WIN_CoInitialize())) {
return SDL_SetError("WASAPI: CoInitialize() failed");
}
ret = CoCreateInstance(&SDL_CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER, &SDL_IID_IMMDeviceEnumerator, (LPVOID *)&enumerator);
if (FAILED(ret)) {
WIN_CoUninitialize();
return WIN_SetErrorFromHRESULT("WASAPI CoCreateInstance(MMDeviceEnumerator)", ret);
}
return 0;
}
void
SDL_IMMDevice_Quit(void)
{
if (enumerator) {
IMMDeviceEnumerator_UnregisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *)&notification_client);
IMMDeviceEnumerator_Release(enumerator);
enumerator = NULL;
}
}
int
SDL_IMMDevice_Get(LPCWSTR devid, IMMDevice **device, SDL_bool iscapture)
{
HRESULT ret;
SDL_assert(device != NULL);
if (devid == NULL) {
const EDataFlow dataflow = iscapture ? eCapture : eRender;
ret = IMMDeviceEnumerator_GetDefaultAudioEndpoint(enumerator, dataflow, SDL_IMMDevice_role, device);
} else {
ret = IMMDeviceEnumerator_GetDevice(enumerator, devid, device);
}
if (FAILED(ret)) {
SDL_assert(*device == NULL);
return WIN_SetErrorFromHRESULT("WASAPI can't find requested audio endpoint", ret);
}
return 0;
}
typedef struct
{
LPWSTR devid;
char *devname;
WAVEFORMATEXTENSIBLE fmt;
GUID dsoundguid;
} EndpointItem;
static int SDLCALL sort_endpoints(const void *_a, const void *_b)
{
LPWSTR a = ((const EndpointItem *)_a)->devid;
LPWSTR b = ((const EndpointItem *)_b)->devid;
if (!a && b) {
return -1;
} else if (a && !b) {
return 1;
}
while (SDL_TRUE) {
if (*a < *b) {
return -1;
} else if (*a > *b) {
return 1;
} else if (*a == 0) {
break;
}
a++;
b++;
}
return 0;
}
static void
EnumerateEndpointsForFlow(const SDL_bool iscapture)
{
IMMDeviceCollection *collection = NULL;
EndpointItem *items;
UINT i, total;
/* Note that WASAPI separates "adapter devices" from "audio endpoint devices"
...one adapter device ("SoundBlaster Pro") might have multiple endpoint devices ("Speakers", "Line-Out"). */
if (FAILED(IMMDeviceEnumerator_EnumAudioEndpoints(enumerator, iscapture ? eCapture : eRender, DEVICE_STATE_ACTIVE, &collection))) {
return;
}
if (FAILED(IMMDeviceCollection_GetCount(collection, &total))) {
IMMDeviceCollection_Release(collection);
return;
}
items = (EndpointItem *)SDL_calloc(total, sizeof(EndpointItem));
if (!items) {
return; /* oh well. */
}
for (i = 0; i < total; i++) {
EndpointItem *item = items + i;
IMMDevice *device = NULL;
if (SUCCEEDED(IMMDeviceCollection_Item(collection, i, &device))) {
if (SUCCEEDED(IMMDevice_GetId(device, &item->devid))) {
GetMMDeviceInfo(device, &item->devname, &item->fmt, &item->dsoundguid);
}
IMMDevice_Release(device);
}
}
/* sort the list of devices by their guid so list is consistent between runs */
SDL_qsort(items, total, sizeof(*items), sort_endpoints);
/* Send the sorted list on to the SDL's higher level. */
for (i = 0; i < total; i++) {
EndpointItem *item = items + i;
if ((item->devid) && (item->devname)) {
SDL_IMMDevice_Add(iscapture, item->devname, &item->fmt, item->devid, &item->dsoundguid, notification_client.useguid);
}
SDL_free(item->devname);
CoTaskMemFree(item->devid);
}
SDL_free(items);
IMMDeviceCollection_Release(collection);
}
void
SDL_IMMDevice_EnumerateEndpoints(SDL_bool useguid)
{
notification_client.useguid = useguid;
EnumerateEndpointsForFlow(SDL_FALSE); /* playback */
EnumerateEndpointsForFlow(SDL_TRUE); /* capture */
/* if this fails, we just won't get hotplug events. Carry on anyhow. */
IMMDeviceEnumerator_RegisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *)&notification_client);
}
SDL_AudioFormat
WaveFormatToSDLFormat(WAVEFORMATEX *waveformat)
{
if ((waveformat->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_F32SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 16)) {
return AUDIO_S16SYS;
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_S32SYS;
} else if (waveformat->wFormatTag == WAVE_FORMAT_EXTENSIBLE) {
const WAVEFORMATEXTENSIBLE *ext = (const WAVEFORMATEXTENSIBLE *)waveformat;
if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT, sizeof(GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_F32SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof(GUID)) == 0) && (waveformat->wBitsPerSample == 16)) {
return AUDIO_S16SYS;
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof(GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
return AUDIO_S32SYS;
}
}
return 0;
}
#endif /* (defined(__WIN32__) || defined(__GDK__)) && HAVE_MMDEVICEAPI_H */

43
src/core/windows/SDL_immdevice.h Normal file
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#ifndef SDL_IMMDEVICE_H
#define SDL_IMMDEVICE_H
#include "SDL_atomic.h"
#include "SDL_audio.h"
#define COBJMACROS
#include <mmdeviceapi.h>
#include <mmreg.h>
int SDL_IMMDevice_Init(void);
void SDL_IMMDevice_Quit(void);
int SDL_IMMDevice_Get(LPCWSTR devid, IMMDevice **device, SDL_bool iscapture);
void SDL_IMMDevice_EnumerateEndpoints(SDL_bool useguid);
SDL_AudioFormat WaveFormatToSDLFormat(WAVEFORMATEX *waveformat);
/* these increment as default devices change. Opened default devices pick up changes in their threads. */
extern SDL_atomic_t SDL_IMMDevice_DefaultPlaybackGeneration;
extern SDL_atomic_t SDL_IMMDevice_DefaultCaptureGeneration;
#endif /* SDL_IMMDEVICE_H */