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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
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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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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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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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#if SDL_AUDIO_DRIVER_WASAPI
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#include "../../core/windows/SDL_windows.h"
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#include "SDL_audio.h"
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#include "SDL_timer.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_sysaudio.h"
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#include "SDL_assert.h"
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#include "SDL_log.h"
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#define COBJMACROS
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#include <mmdeviceapi.h>
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#include <audioclient.h>
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#include "SDL_wasapi.h"
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static const ERole SDL_WASAPI_role = eConsole; /* !!! FIXME: should this be eMultimedia? Should be a hint? */
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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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/* 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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struct DevIdList *next;
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} DevIdList;
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static DevIdList *deviceid_list = NULL;
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/* handle to Avrt.dll--Vista and later!--for flagging the callback thread as "Pro Audio" (low latency). */
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#ifndef __WINRT__
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static HMODULE libavrt = NULL;
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#endif
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typedef HANDLE (WINAPI *pfnAvSetMmThreadCharacteristicsW)(LPWSTR,LPDWORD);
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typedef BOOL (WINAPI *pfnAvRevertMmThreadCharacteristics)(HANDLE);
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static pfnAvSetMmThreadCharacteristicsW pAvSetMmThreadCharacteristicsW = NULL;
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static pfnAvRevertMmThreadCharacteristics pAvRevertMmThreadCharacteristics = NULL;
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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 IID SDL_IID_IAudioClient = { 0x1cb9ad4c, 0xdbfa, 0x4c32, { 0xb1, 0x78, 0xc2, 0xf5, 0x68, 0xa7, 0x03, 0xb2 } };
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static const IID SDL_IID_IAudioRenderClient = { 0xf294acfc, 0x3146, 0x4483, { 0xa7, 0xbf, 0xad, 0xdc, 0xa7, 0xc2, 0x60, 0xe2 } };
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static const IID SDL_IID_IAudioCaptureClient = { 0xc8adbd64, 0xe71e, 0x48a0, { 0xa4, 0xde, 0x18, 0x5c, 0x39, 0x5c, 0xd3, 0x17 } };
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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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static const PROPERTYKEY SDL_PKEY_Device_FriendlyName = { { 0xa45c254e, 0xdf1c, 0x4efd, { 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, } }, 14 };
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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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static void AddWASAPIDevice(const SDL_bool iscapture, IMMDevice *device, LPCWSTR devid);
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static void RemoveWASAPIDevice(const SDL_bool iscapture, LPCWSTR devid);
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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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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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} SDLMMNotificationClient;
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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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{
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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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*ppv = NULL;
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return E_NOINTERFACE;
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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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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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/* 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 0
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const char *flowstr = "?";
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char *utf8;
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SDLMMNotificationClient *this = (SDLMMNotificationClient *) ithis;
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if (role != SDL_WASAPI_role) {
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return S_OK; /* ignore it. */
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}
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// !!! FIXME: should probably switch endpoints if we have a default device opened; it's not clear how trivial this is, though.
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// !!! FIXME: also not clear yet how painful it is to switch when someone opens a tablet's speaker and then plugs in headphones.
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utf8 = pwstrDeviceId ? WIN_StringToUTF8(pwstrDeviceId) : NULL;
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switch (flow) {
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case eRender: flowstr = "RENDER"; break;
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case eCapture: flowstr = "CAPTURE"; break;
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case eAll: flowstr = "ALL"; break;
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}
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SDL_Log("WASAPI: OnDefaultDeviceChanged! '%s' [%s]", utf8, flowstr);
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SDL_free(utf8);
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#endif
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return S_OK;
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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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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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static HRESULT STDMETHODCALLTYPE
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SDLMMNotificationClient_OnDeviceStateChanged(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId, DWORD dwNewState)
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{
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SDLMMNotificationClient *this = (SDLMMNotificationClient *) ithis;
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IMMDevice *device = NULL;
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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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if (dwNewState == DEVICE_STATE_ACTIVE) {
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AddWASAPIDevice(iscapture, device, pwstrDeviceId);
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} else {
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RemoveWASAPIDevice(iscapture, pwstrDeviceId);
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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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return S_OK;
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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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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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static SDLMMNotificationClient notification_client = { ¬ification_client_vtbl, 1 };
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static SDL_bool
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WStrEqual(const WCHAR *a, const WCHAR *b)
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{
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while (*a) {
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if (*a != *b) {
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return SDL_FALSE;
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}
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a++;
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b++;
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}
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return *b == 0;
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}
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static WCHAR *
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WStrDupe(const WCHAR *wstr)
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{
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const int len = (lstrlenW(wstr) + 1) * sizeof (WCHAR);
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WCHAR *retval = (WCHAR *) SDL_malloc(len);
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if (retval) {
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SDL_memcpy(retval, wstr, len);
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}
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return retval;
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}
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static void
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RemoveWASAPIDevice(const SDL_bool iscapture, LPCWSTR devid)
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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 (WStrEqual(i->str, devid)) {
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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, 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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static void
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AddWASAPIDevice(const SDL_bool iscapture, IMMDevice *device, LPCWSTR devid)
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{
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IPropertyStore *props = NULL;
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char *utf8dev = NULL;
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DevIdList *devidlist;
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PROPVARIANT var;
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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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/* 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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/* see if we already have this one. */
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for (devidlist = deviceid_list; devidlist; devidlist = devidlist->next) {
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if (WStrEqual(devidlist->str, devid)) {
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return; /* we already have this. */
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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. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
devid = WStrDupe(devid);
|
|
|
|
|
if (!devid) {
|
|
|
|
|
SDL_free(devidlist);
|
|
|
|
|
return; /* oh well. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
devidlist->str = (WCHAR *) devid;
|
|
|
|
|
devidlist->next = deviceid_list;
|
|
|
|
|
deviceid_list = devidlist;
|
|
|
|
|
|
|
|
|
|
if (SUCCEEDED(IMMDevice_OpenPropertyStore(device, STGM_READ, &props))) {
|
|
|
|
|
PropVariantInit(&var);
|
|
|
|
|
if (SUCCEEDED(IPropertyStore_GetValue(props, &SDL_PKEY_Device_FriendlyName, &var))) {
|
|
|
|
|
utf8dev = WIN_StringToUTF8(var.pwszVal);
|
|
|
|
|
if (utf8dev) {
|
|
|
|
|
SDL_AddAudioDevice(iscapture, utf8dev, (void *) devid);
|
|
|
|
|
SDL_free(utf8dev);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
PropVariantClear(&var);
|
|
|
|
|
IPropertyStore_Release(props);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
EnumerateEndpoints(const SDL_bool iscapture)
|
|
|
|
|
{
|
|
|
|
|
IMMDeviceCollection *collection = NULL;
|
|
|
|
|
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;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < total; i++) {
|
|
|
|
|
IMMDevice *device = NULL;
|
|
|
|
|
if (SUCCEEDED(IMMDeviceCollection_Item(collection, i, &device))) {
|
|
|
|
|
LPWSTR devid = NULL;
|
|
|
|
|
if (SUCCEEDED(IMMDevice_GetId(device, &devid))) {
|
|
|
|
|
AddWASAPIDevice(iscapture, device, devid);
|
|
|
|
|
CoTaskMemFree(devid);
|
|
|
|
|
}
|
|
|
|
|
IMMDevice_Release(device);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
IMMDeviceCollection_Release(collection);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
WASAPI_DetectDevices(void)
|
|
|
|
|
{
|
|
|
|
|
EnumerateEndpoints(SDL_FALSE); /* playback */
|
|
|
|
|
EnumerateEndpoints(SDL_TRUE); /* capture */
|
|
|
|
|
|
|
|
|
|
/* if this fails, we just won't get hotplug events. Carry on anyhow. */
|
|
|
|
|
IMMDeviceEnumerator_RegisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *) ¬ification_client);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
WASAPI_GetPendingBytes(_THIS)
|
|
|
|
|
{
|
|
|
|
|
UINT32 frames = 0;
|
|
|
|
|
if (FAILED(IAudioClient_GetCurrentPadding(this->hidden->client, &frames))) {
|
|
|
|
|
return 0; /* oh well. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return ((int) frames) * this->hidden->framesize;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static Uint8 *
|
|
|
|
|
WASAPI_GetDeviceBuf(_THIS)
|
|
|
|
|
{
|
|
|
|
|
/* get an endpoint buffer from WASAPI. */
|
|
|
|
|
BYTE *buffer = NULL;
|
|
|
|
|
if (FAILED(IAudioRenderClient_GetBuffer(this->hidden->render, this->spec.samples, &buffer))) {
|
|
|
|
|
IAudioClient_Stop(this->hidden->client);
|
|
|
|
|
SDL_OpenedAudioDeviceDisconnected(this); /* uhoh. */
|
|
|
|
|
SDL_assert(buffer == NULL);
|
|
|
|
|
}
|
|
|
|
|
return (Uint8 *) buffer;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
WASAPI_PlayDevice(_THIS)
|
|
|
|
|
{
|
|
|
|
|
if (SDL_AtomicGet(&this->enabled)) { /* not shutting down? */
|
|
|
|
|
if (FAILED(IAudioRenderClient_ReleaseBuffer(this->hidden->render, this->spec.samples, 0))) {
|
|
|
|
|
IAudioClient_Stop(this->hidden->client);
|
|
|
|
|
SDL_OpenedAudioDeviceDisconnected(this); /* uhoh. */
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
WASAPI_WaitDevice(_THIS)
|
|
|
|
|
{
|
|
|
|
|
const UINT32 maxpadding = this->spec.samples;
|
|
|
|
|
while (SDL_AtomicGet(&this->enabled)) {
|
|
|
|
|
UINT32 padding = 0;
|
|
|
|
|
if (FAILED(IAudioClient_GetCurrentPadding(this->hidden->client, &padding))) {
|
|
|
|
|
IAudioClient_Stop(this->hidden->client);
|
|
|
|
|
SDL_OpenedAudioDeviceDisconnected(this);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (padding <= maxpadding) {
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Sleep long enough for half the buffer to be free. */
|
|
|
|
|
SDL_Delay(((padding - maxpadding) * 1000) / this->spec.freq);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
WASAPI_CaptureFromDevice(_THIS, void *buffer, int buflen)
|
|
|
|
|
{
|
|
|
|
|
SDL_AudioStream *stream = this->hidden->capturestream;
|
|
|
|
|
const int avail = SDL_AudioStreamAvailable(stream);
|
|
|
|
|
if (avail > 0) {
|
|
|
|
|
const int cpy = SDL_min(buflen, avail);
|
|
|
|
|
SDL_AudioStreamGet(stream, buffer, cpy);
|
|
|
|
|
return cpy;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
while (SDL_AtomicGet(&this->enabled)) {
|
|
|
|
|
HRESULT ret;
|
|
|
|
|
BYTE *ptr = NULL;
|
|
|
|
|
UINT32 frames = 0;
|
|
|
|
|
DWORD flags = 0;
|
|
|
|
|
|
|
|
|
|
ret = IAudioCaptureClient_GetBuffer(this->hidden->capture, &ptr, &frames, &flags, NULL, NULL);
|
|
|
|
|
if ((ret == AUDCLNT_S_BUFFER_EMPTY) || !frames) {
|
|
|
|
|
WASAPI_WaitDevice(this);
|
|
|
|
|
} else if (ret == S_OK) {
|
|
|
|
|
const int total = ((int) frames) * this->hidden->framesize;
|
|
|
|
|
const int cpy = SDL_min(buflen, total);
|
|
|
|
|
const int leftover = total - cpy;
|
|
|
|
|
const SDL_bool silent = (flags & AUDCLNT_BUFFERFLAGS_SILENT) ? SDL_TRUE : SDL_FALSE;
|
|
|
|
|
|
|
|
|
|
if (silent) {
|
|
|
|
|
SDL_memset(buffer, this->spec.silence, cpy);
|
|
|
|
|
} else {
|
|
|
|
|
SDL_memcpy(buffer, ptr, cpy);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (leftover > 0) {
|
|
|
|
|
ptr += cpy;
|
|
|
|
|
if (silent) {
|
|
|
|
|
SDL_memset(ptr, this->spec.silence, leftover); /* I guess this is safe? */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (SDL_AudioStreamPut(stream, ptr, leftover) == -1) {
|
|
|
|
|
return -1; /* uhoh, out of memory, etc. Kill device. :( */
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
IAudioCaptureClient_ReleaseBuffer(this->hidden->capture, frames);
|
|
|
|
|
return cpy;
|
|
|
|
|
} else {
|
|
|
|
|
break; /* something totally failed. */
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return -1; /* unrecoverable error. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
WASAPI_FlushCapture(_THIS)
|
|
|
|
|
{
|
|
|
|
|
if (SDL_AtomicGet(&this->enabled)) {
|
|
|
|
|
BYTE *ptr = NULL;
|
|
|
|
|
UINT32 frames = 0;
|
|
|
|
|
DWORD flags = 0;
|
|
|
|
|
HRESULT ret;
|
|
|
|
|
/* just read until we stop getting packets, throwing them away. */
|
|
|
|
|
while ((ret = IAudioCaptureClient_GetBuffer(this->hidden->capture, &ptr, &frames, &flags, NULL, NULL)) == S_OK) {
|
|
|
|
|
IAudioCaptureClient_ReleaseBuffer(this->hidden->capture, frames);
|
|
|
|
|
}
|
|
|
|
|
SDL_AudioStreamClear(this->hidden->capturestream);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
WASAPI_CloseDevice(_THIS)
|
|
|
|
|
{
|
|
|
|
|
/* don't touch this->hidden->task in here; it has to be reverted from
|
|
|
|
|
our callback thread. We do that in WASAPI_ThreadDeinit().
|
|
|
|
|
(likewise for this->hidden->coinitialized). */
|
|
|
|
|
|
|
|
|
|
if (this->hidden->client) {
|
|
|
|
|
IAudioClient_Stop(this->hidden->client);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (this->hidden->render) {
|
|
|
|
|
IAudioRenderClient_Release(this->hidden->render);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (this->hidden->client) {
|
|
|
|
|
IAudioClient_Release(this->hidden->client);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (this->hidden->waveformat) {
|
|
|
|
|
CoTaskMemFree(this->hidden->waveformat);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (this->hidden->device) {
|
|
|
|
|
IMMDevice_Release(this->hidden->device);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (this->hidden->capturestream) {
|
|
|
|
|
SDL_FreeAudioStream(this->hidden->capturestream);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
SDL_free(this->hidden);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
WASAPI_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
|
|
|
|
|
{
|
|
|
|
|
/* !!! FIXME: we could request an exclusive mode stream, which is lower latency;
|
|
|
|
|
!!! it will write into the kernel's audio buffer directly instead of
|
|
|
|
|
!!! shared memory that a user-mode mixer then writes to the kernel with
|
|
|
|
|
!!! everything else. Doing this means any other sound using this device will
|
|
|
|
|
!!! stop playing, including the user's MP3 player and system notification
|
|
|
|
|
!!! sounds. You'd probably need to release the device when the app isn't in
|
|
|
|
|
!!! the foreground, to be a good citizen of the system. It's doable, but it's
|
|
|
|
|
!!! more work and causes some annoyances, and I don't know what the latency
|
|
|
|
|
!!! wins actually look like. Maybe add a hint to force exclusive mode at
|
|
|
|
|
!!! some point. To be sure, defaulting to shared mode is the right thing to
|
|
|
|
|
!!! do in any case. */
|
|
|
|
|
const AUDCLNT_SHAREMODE sharemode = AUDCLNT_SHAREMODE_SHARED;
|
|
|
|
|
const EDataFlow dataflow = iscapture ? eCapture : eRender;
|
|
|
|
|
UINT32 bufsize = 0; /* this is in sample frames, not samples, not bytes. */
|
|
|
|
|
REFERENCE_TIME duration = 0;
|
|
|
|
|
IMMDevice *device = NULL;
|
|
|
|
|
IAudioClient *client = NULL;
|
|
|
|
|
IAudioRenderClient *render = NULL;
|
|
|
|
|
IAudioCaptureClient *capture = NULL;
|
|
|
|
|
WAVEFORMATEX *waveformat = NULL;
|
|
|
|
|
SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
|
|
|
|
|
SDL_AudioFormat wasapi_format = 0;
|
|
|
|
|
SDL_bool valid_format = SDL_FALSE;
|
|
|
|
|
HRESULT ret = S_OK;
|
|
|
|
|
|
|
|
|
|
/* Initialize all variables that we clean on shutdown */
|
|
|
|
|
this->hidden = (struct SDL_PrivateAudioData *)
|
|
|
|
|
SDL_malloc((sizeof *this->hidden));
|
|
|
|
|
if (this->hidden == NULL) {
|
|
|
|
|
return SDL_OutOfMemory();
|
|
|
|
|
}
|
|
|
|
|
SDL_zerop(this->hidden);
|
|
|
|
|
|
|
|
|
|
if (handle == NULL) {
|
|
|
|
|
ret = IMMDeviceEnumerator_GetDefaultAudioEndpoint(enumerator, dataflow, SDL_WASAPI_role, &device);
|
|
|
|
|
} else {
|
|
|
|
|
ret = IMMDeviceEnumerator_GetDevice(enumerator, (LPCWSTR) handle, &device);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't find requested audio endpoint", ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
SDL_assert(device != NULL);
|
|
|
|
|
this->hidden->device = device;
|
|
|
|
|
|
|
|
|
|
ret = IMMDevice_Activate(device, &SDL_IID_IAudioClient, CLSCTX_ALL, NULL, (void **) &client);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't activate audio endpoint", ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
SDL_assert(client != NULL);
|
|
|
|
|
this->hidden->client = client;
|
|
|
|
|
|
|
|
|
|
ret = IAudioClient_GetMixFormat(client, &waveformat);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't determine mix format", ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
SDL_assert(waveformat != NULL);
|
|
|
|
|
this->hidden->waveformat = waveformat;
|
|
|
|
|
|
|
|
|
|
/* WASAPI will not do any conversion on our behalf. Force channels and sample rate. */
|
|
|
|
|
this->spec.channels = (Uint8) waveformat->nChannels;
|
|
|
|
|
this->spec.freq = waveformat->nSamplesPerSec;
|
|
|
|
|
|
|
|
|
|
/* Make sure we have a valid format that we can convert to whatever WASAPI wants. */
|
|
|
|
|
if ((waveformat->wFormatTag == WAVE_FORMAT_IEEE_FLOAT) && (waveformat->wBitsPerSample == 32)) {
|
|
|
|
|
wasapi_format = AUDIO_F32SYS;
|
|
|
|
|
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 16)) {
|
|
|
|
|
wasapi_format = AUDIO_S16SYS;
|
|
|
|
|
} else if ((waveformat->wFormatTag == WAVE_FORMAT_PCM) && (waveformat->wBitsPerSample == 32)) {
|
|
|
|
|
wasapi_format = 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)) {
|
|
|
|
|
wasapi_format = AUDIO_F32SYS;
|
|
|
|
|
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 16)) {
|
|
|
|
|
wasapi_format = AUDIO_S16SYS;
|
|
|
|
|
} else if ((SDL_memcmp(&ext->SubFormat, &SDL_KSDATAFORMAT_SUBTYPE_PCM, sizeof (GUID)) == 0) && (waveformat->wBitsPerSample == 32)) {
|
|
|
|
|
wasapi_format = AUDIO_S32SYS;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
while ((!valid_format) && (test_format)) {
|
|
|
|
|
if (test_format == wasapi_format) {
|
|
|
|
|
this->spec.format = test_format;
|
|
|
|
|
valid_format = SDL_TRUE;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
test_format = SDL_NextAudioFormat();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (!valid_format) {
|
|
|
|
|
return SDL_SetError("WASAPI: Unsupported audio format");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = IAudioClient_GetDevicePeriod(client, NULL, &duration);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't determine minimum device period", ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = IAudioClient_Initialize(client, sharemode, 0, duration, sharemode == AUDCLNT_SHAREMODE_SHARED ? 0 : duration, waveformat, NULL);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't initialize audio client", ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = IAudioClient_GetBufferSize(client, &bufsize);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't determine buffer size", ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
this->spec.samples = (Uint16) bufsize;
|
|
|
|
|
if (!iscapture) {
|
|
|
|
|
this->spec.samples /= 2; /* fill half of the DMA buffer on each run. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Update the fragment size as size in bytes */
|
|
|
|
|
SDL_CalculateAudioSpec(&this->spec);
|
|
|
|
|
|
|
|
|
|
this->hidden->framesize = (SDL_AUDIO_BITSIZE(this->spec.format) / 8) * this->spec.channels;
|
|
|
|
|
|
|
|
|
|
if (iscapture) {
|
|
|
|
|
this->hidden->capturestream = SDL_NewAudioStream(this->spec.format, this->spec.channels, this->spec.freq, this->spec.format, this->spec.channels, this->spec.freq);
|
|
|
|
|
if (!this->hidden->capturestream) {
|
|
|
|
|
return -1; /* already set SDL_Error */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = IAudioClient_GetService(client, &SDL_IID_IAudioCaptureClient, (void**) &capture);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't get capture client service", ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
SDL_assert(capture != NULL);
|
|
|
|
|
this->hidden->capture = capture;
|
|
|
|
|
ret = IAudioClient_Start(client);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't start capture", ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
WASAPI_FlushCapture(this); /* MSDN says you should flush capture endpoint right after startup. */
|
|
|
|
|
} else {
|
|
|
|
|
ret = IAudioClient_GetService(client, &SDL_IID_IAudioRenderClient, (void**) &render);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't get render client service", ret);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
SDL_assert(render != NULL);
|
|
|
|
|
this->hidden->render = render;
|
|
|
|
|
ret = IAudioClient_Start(client);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
return WIN_SetErrorFromHRESULT("WASAPI can't start playback", ret);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 0; /* good to go. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
WASAPI_ThreadInit(_THIS)
|
|
|
|
|
{
|
|
|
|
|
/* this thread uses COM. */
|
|
|
|
|
if (SUCCEEDED(WIN_CoInitialize())) { /* can't report errors, hope it worked! */
|
|
|
|
|
this->hidden->coinitialized = SDL_TRUE;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Set this thread to very high "Pro Audio" priority. */
|
|
|
|
|
if (pAvSetMmThreadCharacteristicsW) {
|
|
|
|
|
DWORD idx = 0;
|
|
|
|
|
this->hidden->task = pAvSetMmThreadCharacteristicsW(TEXT("Pro Audio"), &idx);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
WASAPI_ThreadDeinit(_THIS)
|
|
|
|
|
{
|
|
|
|
|
/* Set this thread to very high "Pro Audio" priority. */
|
|
|
|
|
if (this->hidden->task && pAvRevertMmThreadCharacteristics) {
|
|
|
|
|
pAvRevertMmThreadCharacteristics(this->hidden->task);
|
|
|
|
|
this->hidden->task = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (this->hidden->coinitialized) {
|
|
|
|
|
WIN_CoUninitialize();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
WASAPI_Deinitialize(void)
|
|
|
|
|
{
|
|
|
|
|
DevIdList *devidlist;
|
|
|
|
|
DevIdList *next;
|
|
|
|
|
|
|
|
|
|
if (enumerator) {
|
|
|
|
|
IMMDeviceEnumerator_UnregisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *) ¬ification_client);
|
|
|
|
|
IMMDeviceEnumerator_Release(enumerator);
|
|
|
|
|
enumerator = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifndef __WINRT__
|
|
|
|
|
if (libavrt) {
|
|
|
|
|
FreeLibrary(libavrt);
|
|
|
|
|
libavrt = NULL;
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
pAvSetMmThreadCharacteristicsW = NULL;
|
|
|
|
|
pAvRevertMmThreadCharacteristics = NULL;
|
|
|
|
|
|
|
|
|
|
for (devidlist = deviceid_list; devidlist; devidlist = next) {
|
|
|
|
|
next = devidlist->next;
|
|
|
|
|
SDL_free(devidlist->str);
|
|
|
|
|
SDL_free(devidlist);
|
|
|
|
|
}
|
|
|
|
|
deviceid_list = NULL;
|
|
|
|
|
|
|
|
|
|
WIN_CoUninitialize();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
WASAPI_Init(SDL_AudioDriverImpl * impl)
|
|
|
|
|
{
|
|
|
|
|
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())) {
|
|
|
|
|
SDL_SetError("WASAPI: CoInitialize() failed");
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ret = CoCreateInstance(&SDL_CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER, &SDL_IID_IMMDeviceEnumerator, (LPVOID) &enumerator);
|
|
|
|
|
if (FAILED(ret)) {
|
|
|
|
|
WIN_CoUninitialize();
|
|
|
|
|
WIN_SetErrorFromHRESULT("WASAPI CoCreateInstance(MMDeviceEnumerator)", ret);
|
|
|
|
|
return 0; /* oh well. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef __WINRT__
|
|
|
|
|
pAvSetMmThreadCharacteristicsW = AvSetMmThreadCharacteristicsW;
|
|
|
|
|
pAvRevertMmThreadCharacteristics = AvRevertMmThreadCharacteristics;
|
|
|
|
|
#else
|
|
|
|
|
libavrt = LoadLibraryW(L"avrt.dll"); /* this library is available in Vista and later. No WinXP, so have to LoadLibrary to use it for now! */
|
|
|
|
|
if (libavrt) {
|
|
|
|
|
pAvSetMmThreadCharacteristicsW = (pfnAvSetMmThreadCharacteristicsW) GetProcAddress(libavrt, "AvSetMmThreadCharacteristicsW");
|
|
|
|
|
pAvRevertMmThreadCharacteristics = (pfnAvRevertMmThreadCharacteristics) GetProcAddress(libavrt, "AvRevertMmThreadCharacteristics");
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Set the function pointers */
|
|
|
|
|
impl->DetectDevices = WASAPI_DetectDevices;
|
|
|
|
|
impl->ThreadInit = WASAPI_ThreadInit;
|
|
|
|
|
impl->ThreadDeinit = WASAPI_ThreadDeinit;
|
|
|
|
|
impl->OpenDevice = WASAPI_OpenDevice;
|
|
|
|
|
impl->PlayDevice = WASAPI_PlayDevice;
|
|
|
|
|
impl->WaitDevice = WASAPI_WaitDevice;
|
|
|
|
|
impl->GetPendingBytes = WASAPI_GetPendingBytes;
|
|
|
|
|
impl->GetDeviceBuf = WASAPI_GetDeviceBuf;
|
|
|
|
|
impl->CaptureFromDevice = WASAPI_CaptureFromDevice;
|
|
|
|
|
impl->FlushCapture = WASAPI_FlushCapture;
|
|
|
|
|
impl->CloseDevice = WASAPI_CloseDevice;
|
|
|
|
|
impl->Deinitialize = WASAPI_Deinitialize;
|
|
|
|
|
impl->HasCaptureSupport = 1;
|
|
|
|
|
|
|
|
|
|
return 1; /* this audio target is available. */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
AudioBootStrap WASAPI_bootstrap = {
|
|
|
|
|
"wasapi", "WASAPI", WASAPI_Init, 0
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
#endif /* SDL_AUDIO_DRIVER_WASAPI */
|
|
|
|
|
|
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|
Ryan C. Gordon