348 lines
11 KiB
C
348 lines
11 KiB
C
/*
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* $Id$
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* Portable Audio I/O Library
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* Hotplug interface and utilities
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* Copyright (c) 2011-2016 Robert Bielik
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*
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* Based on the Open Source API proposed by Ross Bencina
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* Copyright (c) 1999-2016 Ross Bencina, Phil Burk
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The text above constitutes the entire PortAudio license; however,
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* the PortAudio community also makes the following non-binding requests:
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*
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* Any person wishing to distribute modifications to the Software is
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* requested to send the modifications to the original developer so that
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* they can be incorporated into the canonical version. It is also
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* requested that these non-binding requests be included along with the
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* license above.
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*/
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#include "pa_hotplug.h"
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#include "pa_util.h"
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#include "pa_debugprint.h"
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#include "pa_allocation.h"
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#include "pa_win_wdmks_utils.h"
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#include <windows.h>
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#include <dbt.h>
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#include <process.h>
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#include <assert.h>
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#include <ks.h>
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#include <ksmedia.h>
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#include <setupapi.h>
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#include <stdio.h>
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#if (defined(WIN32) && (defined(_MSC_VER) && (_MSC_VER >= 1200))) /* MSC version 6 and above */
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#pragma comment( lib, "setupapi.lib" )
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#endif
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/* use CreateThread for CYGWIN/Windows Mobile, _beginthreadex for all others */
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#if !defined(__CYGWIN__) && !defined(_WIN32_WCE)
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#define CREATE_THREAD_FUNCTION (HANDLE)_beginthreadex
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#define PA_THREAD_FUNC static unsigned WINAPI
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#else
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#define CREATE_THREAD_FUNCTION CreateThread
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#define PA_THREAD_FUNC static DWORD WINAPI
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#endif
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typedef struct PaHotPlugDeviceInfo
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{
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wchar_t name[MAX_PATH];
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struct PaHotPlugDeviceInfo* next;
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} PaHotPlugDeviceInfo;
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typedef struct PaHotPlugDeviceEventHandlerInfo
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{
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HANDLE hWnd;
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HANDLE hMsgThread;
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HANDLE hNotify;
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CRITICAL_SECTION lock;
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PaUtilAllocationGroup* cacheAllocGroup;
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PaHotPlugDeviceInfo* cache;
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} PaHotPlugDeviceEventHandlerInfo;
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static BOOL RemoveDeviceFromCache(PaHotPlugDeviceEventHandlerInfo* pInfo, const wchar_t* name)
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{
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if (pInfo->cache != NULL)
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{
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PaHotPlugDeviceInfo* lastEntry = 0;
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PaHotPlugDeviceInfo* entry = pInfo->cache;
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while (entry != NULL)
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{
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if (_wcsicmp(entry->name, name) == 0)
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{
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if (lastEntry)
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{
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lastEntry->next = entry->next;
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}
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else
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{
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pInfo->cache = NULL;
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}
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PaUtil_GroupFreeMemory(pInfo->cacheAllocGroup, entry);
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return TRUE;
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}
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lastEntry = entry;
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entry = entry->next;
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}
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}
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return FALSE;
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}
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static void InsertDeviceIntoCache(PaHotPlugDeviceEventHandlerInfo* pInfo, const wchar_t* name)
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{
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PaHotPlugDeviceInfo** ppEntry = NULL;
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/* Remove it first (if possible) so we don't accidentally get duplicates */
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RemoveDeviceFromCache(pInfo, name);
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if (pInfo->cache == NULL)
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{
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ppEntry = &pInfo->cache;
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}
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else
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{
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PaHotPlugDeviceInfo* entry = pInfo->cache;
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while (entry->next != NULL)
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{
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entry = entry->next;
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}
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ppEntry = &entry->next;
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}
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*ppEntry = (PaHotPlugDeviceInfo*)PaUtil_GroupAllocateMemory(pInfo->cacheAllocGroup, sizeof(PaHotPlugDeviceInfo));
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wcsncpy((*ppEntry)->name, name, MAX_PATH-1);
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(*ppEntry)->next = NULL;
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}
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static BOOL IsDeviceAudio(const wchar_t* deviceName)
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{
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int channelCnt = 0;
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channelCnt += PaWin_WDMKS_QueryFilterMaximumChannelCount((void*)deviceName, 1);
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channelCnt += PaWin_WDMKS_QueryFilterMaximumChannelCount((void*)deviceName, 0);
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return (channelCnt > 0);
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}
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static void PopulateCacheWithAvailableAudioDevices(PaHotPlugDeviceEventHandlerInfo* pInfo)
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{
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HDEVINFO handle = NULL;
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const int sizeInterface = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_W) + (MAX_PATH * sizeof(WCHAR));
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SP_DEVICE_INTERFACE_DETAIL_DATA_W* devInterfaceDetails = (SP_DEVICE_INTERFACE_DETAIL_DATA_W*)PaUtil_AllocateMemory(sizeInterface);
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if (devInterfaceDetails)
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{
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devInterfaceDetails->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA_W);
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/* Open a handle to search for devices (filters) */
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handle = SetupDiGetClassDevsW(&KSCATEGORY_AUDIO,NULL,NULL,DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
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if( handle != NULL )
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{
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int device;
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/* Iterate through the devices */
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for( device = 0;;device++ )
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{
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SP_DEVICE_INTERFACE_DATA interfaceData;
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SP_DEVINFO_DATA devInfoData;
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int noError;
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interfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
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interfaceData.Reserved = 0;
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devInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
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devInfoData.Reserved = 0;
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noError = SetupDiEnumDeviceInterfaces(handle,NULL,&KSCATEGORY_AUDIO,device,&interfaceData);
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if( !noError )
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break; /* No more devices */
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noError = SetupDiGetDeviceInterfaceDetailW(handle,&interfaceData,devInterfaceDetails,sizeInterface,NULL,&devInfoData);
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if( noError )
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{
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if (IsDeviceAudio(devInterfaceDetails->DevicePath))
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{
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PA_DEBUG(("Hotplug cache populated with: '%S'\n", devInterfaceDetails->DevicePath));
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InsertDeviceIntoCache(pInfo, devInterfaceDetails->DevicePath);
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}
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}
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}
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SetupDiDestroyDeviceInfoList(handle);
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}
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PaUtil_FreeMemory(devInterfaceDetails);
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}
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}
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static LRESULT CALLBACK PaMsgWinProcW(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
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{
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PaHotPlugDeviceEventHandlerInfo* pInfo = (PaHotPlugDeviceEventHandlerInfo*)( GetWindowLongPtr(hWnd, GWLP_USERDATA) );
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switch(msg)
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{
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case WM_DEVICECHANGE:
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switch(wParam)
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{
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case DBT_DEVICEARRIVAL:
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{
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PDEV_BROADCAST_DEVICEINTERFACE_W ptr = (PDEV_BROADCAST_DEVICEINTERFACE_W)lParam;
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if (ptr->dbcc_devicetype != DBT_DEVTYP_DEVICEINTERFACE)
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break;
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if (!IsEqualGUID(&ptr->dbcc_classguid, &KSCATEGORY_AUDIO))
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break;
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if (IsDeviceAudio(ptr->dbcc_name))
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{
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PA_DEBUG(("Device inserted : %S\n", ptr->dbcc_name));
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InsertDeviceIntoCache(pInfo, ptr->dbcc_name);
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PaUtil_DevicesChanged(1, ptr->dbcc_name);
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}
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}
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break;
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case DBT_DEVICEREMOVECOMPLETE:
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{
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PDEV_BROADCAST_DEVICEINTERFACE_W ptr = (PDEV_BROADCAST_DEVICEINTERFACE_W)lParam;
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if (ptr->dbcc_devicetype != DBT_DEVTYP_DEVICEINTERFACE)
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break;
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if (!IsEqualGUID(&ptr->dbcc_classguid, &KSCATEGORY_AUDIO))
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break;
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if (RemoveDeviceFromCache(pInfo, ptr->dbcc_name))
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{
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PA_DEBUG(("Device removed : %S\n", ptr->dbcc_name));
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PaUtil_DevicesChanged(2, ptr->dbcc_name);
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}
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}
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break;
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default:
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break;
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}
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break;
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}
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return DefWindowProcW(hWnd, msg, wParam, lParam);
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}
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PA_THREAD_FUNC PaRunMessageLoop(void* ptr)
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{
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PaHotPlugDeviceEventHandlerInfo* pInfo = (PaHotPlugDeviceEventHandlerInfo*)ptr;
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WNDCLASSW wnd = { 0 };
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HMODULE hInstance = GetModuleHandleW(NULL);
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wnd.lpfnWndProc = PaMsgWinProcW;
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wnd.hInstance = hInstance;
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wnd.lpszClassName = L"{1E0D4F5A-B31F-4dcc-AE3C-4F30A47BD521}"; /* Using a GUID as class name */
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pInfo->hWnd = CreateWindowW((LPCWSTR)MAKEINTATOM(RegisterClassW(&wnd)), NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, hInstance, NULL);
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if (pInfo->hWnd)
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{
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DEV_BROADCAST_DEVICEINTERFACE_W NotificationFilter = { sizeof(DEV_BROADCAST_DEVICEINTERFACE_W) };
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NotificationFilter.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
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#ifndef DEVICE_NOTIFY_ALL_INTERFACE_CLASSES
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#define DEVICE_NOTIFY_ALL_INTERFACE_CLASSES 0x00000004
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#endif
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pInfo->hNotify = RegisterDeviceNotificationW(
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pInfo->hWnd,
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&NotificationFilter,
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DEVICE_NOTIFY_WINDOW_HANDLE|DEVICE_NOTIFY_ALL_INTERFACE_CLASSES
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);
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assert(pInfo->hNotify);
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SetWindowLongPtr(pInfo->hWnd, GWLP_USERDATA, (LONG_PTR)pInfo);
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if (pInfo->hNotify)
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{
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MSG msg;
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BOOL result;
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while((result = GetMessageW(&msg, pInfo->hWnd, 0, 0)) != 0)
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{
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if (result == -1)
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{
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break;
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}
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TranslateMessage(&msg);
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DispatchMessageW(&msg);
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}
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UnregisterDeviceNotification(pInfo->hNotify);
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pInfo->hNotify = 0;
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}
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DestroyWindow(pInfo->hWnd);
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pInfo->hWnd = 0;
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}
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return 0;
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}
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static PaHotPlugDeviceEventHandlerInfo* s_handler = 0;
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void PaUtil_InitializeHotPlug()
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{
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if (s_handler == 0)
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{
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s_handler = (PaHotPlugDeviceEventHandlerInfo*)PaUtil_AllocateMemory(sizeof(PaHotPlugDeviceEventHandlerInfo));
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if (s_handler)
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{
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s_handler->cacheAllocGroup = PaUtil_CreateAllocationGroup();
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InitializeCriticalSection(&s_handler->lock);
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PopulateCacheWithAvailableAudioDevices(s_handler);
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/* Start message thread */
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s_handler->hMsgThread = CREATE_THREAD_FUNCTION(NULL, 0, PaRunMessageLoop, s_handler, 0, NULL);
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assert(s_handler->hMsgThread != 0);
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}
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}
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}
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void PaUtil_TerminateHotPlug()
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{
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if (s_handler != 0)
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{
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if (s_handler->hWnd)
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{
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PostMessage(s_handler->hWnd, WM_QUIT, 0, 0);
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if (WaitForSingleObject(s_handler->hMsgThread, 1000) == WAIT_TIMEOUT)
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{
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TerminateThread(s_handler->hMsgThread, (DWORD)-1);
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}
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}
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DeleteCriticalSection(&s_handler->lock);
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PaUtil_FreeAllAllocations( s_handler->cacheAllocGroup );
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PaUtil_DestroyAllocationGroup( s_handler->cacheAllocGroup );
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PaUtil_FreeMemory( s_handler );
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s_handler = 0;
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}
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}
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void PaUtil_LockHotPlug()
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{
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EnterCriticalSection(&s_handler->lock);
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}
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void PaUtil_UnlockHotPlug()
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{
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LeaveCriticalSection(&s_handler->lock);
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}
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