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