mirror of
https://github.com/cookiengineer/audacity
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Add new files...should have been part of r13697
I REALLY need to come up with a better process for moving between plats as I (apparently) can't remember to do a simple "svn add" on the final move...grrrr!!!!
This commit is contained in:
lllucius
parent
512cf7faca
commit
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406
src/DeviceChange.cpp
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406
src/DeviceChange.cpp
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/**********************************************************************
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Audacity: A Digital Audio Editor
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DeviceChange.cpp
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Leland Lucius
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*******************************************************************//*!
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\file DeviceChange.cpp
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\brief
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*//*******************************************************************/
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#include "DeviceChange.h"
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#if defined(EXPERIMENTAL_DEVICE_CHANGE_HANDLER)
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#if defined(HAVE_DEVICE_CHANGE)
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#include <wx/module.h>
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#include <wx/timer.h>
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#include <wx/thread.h>
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DECLARE_LOCAL_EVENT_TYPE(EVT_DEVICE_CHANGE, -1);
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DEFINE_EVENT_TYPE(EVT_DEVICE_CHANGE);
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#if defined(__WXMSW__)
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#include <Windows.h>
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#include <mmsystem.h>
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#include <mmdeviceapi.h>
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#include <audioclient.h>
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class DeviceChangeListener : public IMMNotificationClient,
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public DeviceChangeInterface
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{
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public:
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DeviceChangeListener()
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{
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mRefCnt = 1;
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mEnumerator = NULL;
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mEnabled = false;
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mHandler = NULL;
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}
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virtual ~DeviceChangeListener()
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{
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if (mEnumerator)
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{
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mEnumerator->UnregisterEndpointNotificationCallback(this);
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mEnumerator = NULL;
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}
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if (mHandler)
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{
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CoInitialize(NULL);
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}
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}
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// IUnknown implementation
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ULONG STDMETHODCALLTYPE AddRef()
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{
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return InterlockedIncrement(&mRefCnt);
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}
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ULONG STDMETHODCALLTYPE Release()
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{
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ULONG cnt = InterlockedDecrement(&mRefCnt);
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if (cnt == 0)
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{
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delete this;
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}
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return cnt;
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}
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HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, VOID **ppvInterface)
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{
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if (riid == IID_IUnknown)
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{
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AddRef();
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*ppvInterface = (IUnknown *) this;
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}
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else if (riid == __uuidof(IMMNotificationClient))
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{
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AddRef();
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*ppvInterface = (IMMNotificationClient *) this;
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}
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else
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{
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*ppvInterface = NULL;
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return E_NOINTERFACE;
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}
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return S_OK;
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}
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// IMMDeviceChangeListener implementation
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HRESULT STDMETHODCALLTYPE OnDefaultDeviceChanged( EDataFlow flow, ERole role, LPCWSTR pwstrDeviceId)
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{
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return S_OK;
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}
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HRESULT STDMETHODCALLTYPE OnDeviceAdded(LPCWSTR pwstrDeviceId)
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{
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return S_OK;
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}
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HRESULT STDMETHODCALLTYPE OnDeviceRemoved(LPCWSTR pwstrDeviceId)
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{
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return S_OK;
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}
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HRESULT STDMETHODCALLTYPE OnDeviceStateChanged(LPCWSTR pwstrDeviceId, DWORD dwNewState)
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{
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if (mEnabled)
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{
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mEnabled = false;
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wxMutexGuiEnter();
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wxCommandEvent e(EVT_DEVICE_CHANGE);
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mHandler->AddPendingEvent(e);
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wxMutexGuiLeave();
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}
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return S_OK;
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}
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HRESULT STDMETHODCALLTYPE OnPropertyValueChanged(LPCWSTR pwstrDeviceId, const PROPERTYKEY key)
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{
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return S_OK;
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}
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bool SetHandler(wxEvtHandler *handler)
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{
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mHandler = handler;
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CoInitialize(NULL);
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HRESULT hr = CoCreateInstance(__uuidof(MMDeviceEnumerator),
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NULL,
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CLSCTX_INPROC_SERVER,
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__uuidof(IMMDeviceEnumerator),
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(void**)&mEnumerator);
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if (hr == S_OK && mEnumerator)
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{
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mEnumerator->RegisterEndpointNotificationCallback(this);
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}
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return hr == S_OK && mEnumerator;
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}
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void Enable(bool enable)
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{
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mEnabled = enable;
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}
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private:
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wxEvtHandler *mHandler;
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bool mEnabled;
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ULONG mRefCnt;
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IMMDeviceEnumerator *mEnumerator;
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};
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#elif defined(__WXGTK__)
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#include <libudev.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <locale.h>
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#include <unistd.h>
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class DeviceChangeListener : public DeviceChangeInterface
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{
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public:
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DeviceChangeListener()
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{
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mEnabled = false;
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mHandler = NULL;
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mThread = 0;
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}
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virtual ~DeviceChangeListener()
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{
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if (mThread)
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{
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pthread_cancel(mThread);
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mThread = 0;
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}
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}
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// IUnknown implementation
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bool SetHandler(wxEvtHandler *handler)
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{
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mHandler = handler;
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return pthread_create(&mThread, NULL, DeviceChangeListener::Listener, this) == 0;
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}
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void Enable(bool enable)
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{
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mEnabled = enable;
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}
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static void *Listener(void *parm)
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{
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DeviceChangeListener *This = (DeviceChangeListener *) parm;
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// Instantiate the udev object
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struct udev *udev = udev_new();
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if (!udev)
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{
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pthread_exit(NULL);
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}
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// Instantiate the monitor object
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struct udev_monitor *mon = udev_monitor_new_from_netlink(udev, "udev");
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// Start receiving notifications
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udev_monitor_enable_receiving(mon);
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// Get the file descriptor we'll wait on
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int fd = udev_monitor_get_fd(mon);
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while (true)
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{
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fd_set set;
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FD_ZERO(&set);
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FD_SET(fd, &set);
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if (select(fd + 1, &set, NULL, NULL, NULL) < 0)
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{
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break;
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}
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if (FD_ISSET(fd, &set))
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{
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struct udev_device *dev = udev_monitor_receive_device(mon);
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if (dev)
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{
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#if 0
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printf("Got Device\n");
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printf(" Node: %s\n", udev_device_get_devnode(dev));
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printf(" Subsystem: %s\n", udev_device_get_subsystem(dev));
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printf(" Devtype: %s\n", udev_device_get_devtype(dev));
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printf(" Action: %s\n", udev_device_get_action(dev));
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#endif
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if (This->mEnabled)
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{
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This->mEnabled = false;
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wxMutexGuiEnter();
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wxCommandEvent e(EVT_DEVICE_CHANGE);
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This->mHandler->AddPendingEvent(e);
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wxMutexGuiLeave();
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}
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udev_device_unref(dev);
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}
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}
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}
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udev_unref(udev);
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pthread_exit(NULL);
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}
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private:
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wxEvtHandler *mHandler;
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bool mEnabled;
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pthread_t mThread;
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};
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#elif defined(__WXMAC__)
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#include <CoreAudio/CoreAudio.h>
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class DeviceChangeListener : public DeviceChangeInterface
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{
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public:
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DeviceChangeListener()
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{
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mEnabled = false;
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mHandler = NULL;
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mListening = false;
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}
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virtual ~DeviceChangeListener()
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{
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if (mListening)
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{
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AudioObjectPropertyAddress property_address;
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property_address.mSelector = kAudioHardwarePropertyDevices;
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property_address.mScope = kAudioObjectPropertyScopeGlobal;
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property_address.mElement = kAudioObjectPropertyElementMaster;
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AudioObjectRemovePropertyListener(kAudioObjectSystemObject,
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&property_address,
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DeviceChangeListener::Listener,
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this);
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mListening = false;
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}
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}
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// IUnknown implementation
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bool SetHandler(wxEvtHandler *handler)
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{
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mHandler = handler;
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AudioObjectPropertyAddress property_address;
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property_address.mSelector = kAudioHardwarePropertyDevices;
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property_address.mScope = kAudioObjectPropertyScopeGlobal;
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property_address.mElement = kAudioObjectPropertyElementMaster;
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mListening = AudioObjectAddPropertyListener(kAudioObjectSystemObject,
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&property_address,
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DeviceChangeListener::Listener,
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this) == 0;
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}
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void Enable(bool enable)
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{
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mEnabled = enable;
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}
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static OSStatus Listener(AudioObjectID objectID,
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UInt32 numberAddresses,
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const AudioObjectPropertyAddress inAddresses[],
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void *clientData)
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{
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DeviceChangeListener *This = (DeviceChangeListener *) clientData;
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for (int i = 0; i < numberAddresses; i++)
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{
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#if 0
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printf("address %d\n", i);
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printf("selector %08x\n", inAddresses[i].mSelector);
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printf("scope %08x\n", inAddresses[i].mScope);
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printf("element %08x\n", inAddresses[i].mElement);
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#endif
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if (This->mEnabled)
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{
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This->mEnabled = false;
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wxMutexGuiEnter();
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wxCommandEvent e(EVT_DEVICE_CHANGE);
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This->mHandler->AddPendingEvent(e);
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wxMutexGuiLeave();
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}
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}
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return 0;
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}
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private:
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wxEvtHandler *mHandler;
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bool mEnabled;
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bool mListening;
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};
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#endif
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BEGIN_EVENT_TABLE(DeviceChangeHandler, wxEvtHandler)
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EVT_COMMAND(wxID_ANY, EVT_DEVICE_CHANGE, DeviceChangeHandler::OnChange)
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EVT_TIMER(wxID_ANY, DeviceChangeHandler::OnTimer)
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END_EVENT_TABLE()
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DeviceChangeHandler::DeviceChangeHandler()
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: wxEvtHandler()
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{
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mTimer.SetOwner(this);
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mListener = new DeviceChangeListener();
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mListener->SetHandler(this);
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mListener->Enable(true);
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}
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DeviceChangeHandler::~DeviceChangeHandler()
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{
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if (mListener)
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{
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mListener->Enable(false);
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delete mListener;
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}
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}
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void DeviceChangeHandler::Enable(bool enable)
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{
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mListener->Enable(enable);
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}
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void DeviceChangeHandler::OnChange(wxCommandEvent & evt)
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{
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mTimer.Start(500, true);
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}
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void DeviceChangeHandler::OnTimer(wxTimerEvent & evt)
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{
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DeviceChangeNotification();
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mListener->Enable(true);
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}
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#endif
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#endif
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61
src/DeviceChange.h
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61
src/DeviceChange.h
Normal file
@ -0,0 +1,61 @@
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/**********************************************************************
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Audacity: A Digital Audio Editor
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DeviceChange.h
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Leland Lucius
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**********************************************************************/
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#ifndef __AUDACITY_DEVICECHANGE_H__
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#define __AUDACITY_DEVICECHANGE_H__
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#include "Audacity.h"
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#include "Experimental.h"
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#if defined(EXPERIMENTAL_DEVICE_CHANGE_HANDLER)
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#if defined(__WXMSW__) || defined(__WXMAC__) || defined(HAVE_LIBUDEV_H)
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#define HAVE_DEVICE_CHANGE
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#endif
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#if defined(HAVE_DEVICE_CHANGE)
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#include <wx/event.h>
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#include <wx/timer.h>
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class DeviceChangeInterface
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{
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public:
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virtual ~DeviceChangeInterface() {};
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virtual bool SetHandler(wxEvtHandler *handler) = 0;
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virtual void Enable(bool enable = true) = 0;
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};
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class DeviceChangeHandler : public wxEvtHandler
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{
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public:
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DeviceChangeHandler();
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virtual ~DeviceChangeHandler();
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void Enable(bool enable = true);
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virtual void DeviceChangeNotification() = 0;
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private:
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void OnChange(wxCommandEvent & evt);
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void OnTimer(wxTimerEvent & evt);
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DeviceChangeInterface *mListener;
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wxTimer mTimer;
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DECLARE_EVENT_TABLE()
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};
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#endif
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#endif
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#endif
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