215 lines
3.8 KiB
C++
215 lines
3.8 KiB
C++
/****************************************************************************
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*
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* FILE: Audio.cpp
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*
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* CREATED: Mike VanBuskirk (MikeV) 3-02-98
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*
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* CONTENTS: Audio control object
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*
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****************************************************************************/
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#include "precomp.h"
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#include "avdefs.h"
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#include "audio.h"
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#include "h323.h"
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#include <nacguids.h>
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#include "audio.h"
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CAudioControl::CAudioControl(BOOL fLocal)
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: m_fPaused(FALSE),
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m_fLocal(fLocal),
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m_fChannelOpen(FALSE),
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m_fOpenPending(FALSE),
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m_fReopenPending(FALSE),
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m_fClosePending(FALSE),
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m_pCommChannel(NULL),
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m_pConnection(NULL),
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m_pMediaStream(NULL),
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m_NewFormat(INVALID_MEDIA_FORMAT)
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{
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}
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CAudioControl::~CAudioControl()
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{
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if (NULL != m_pCommChannel)
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{
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m_pCommChannel->Release();
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}
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}
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BOOL CAudioControl::ChanInitialize(ICommChannel* pCommChannel)
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{
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ASSERT(m_pCommChannel == NULL);
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m_pCommChannel = pCommChannel;
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m_pCommChannel->AddRef();
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return TRUE;
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}
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VOID CAudioControl::Open(MEDIA_FORMAT_ID format_id)
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{
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if(!m_pCommChannel)
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{
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return;
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}
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m_pCommChannel->PauseNetworkStream(FALSE);
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m_pCommChannel->EnableOpen(TRUE);
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if (m_fLocal)
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{
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HRESULT hr;
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// if the channel is not open and a call is in progress, now is the time
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if(m_pConnection && m_pCommChannel)
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{
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// a call is in progress
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if(!IsChannelOpen()
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&& !m_fOpenPending)
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{
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// so, the channel is not open
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if(format_id != INVALID_MEDIA_FORMAT)
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{
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// try to open a channel using specified format
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m_fOpenPending = TRUE; // do this first (callbacks!)
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hr = m_pCommChannel->Open(format_id, m_pConnection);
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if(FAILED(hr))
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m_fOpenPending = FALSE;
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}
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}
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else if (m_fClosePending)
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{
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m_NewFormat = format_id;
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if(format_id != INVALID_MEDIA_FORMAT)
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{
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m_fClosePending = FALSE;
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m_fReopenPending = TRUE;
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hr = m_pCommChannel->Close();
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}
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}
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}
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}
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}
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VOID CAudioControl::Close()
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{
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HRESULT hr;
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hr = m_pCommChannel->Close();
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// what to do about an error?
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}
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VOID CAudioControl::EnableXfer(BOOL fEnable)
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{
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m_fXfer = fEnable;
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if(m_pCommChannel)
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{
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BOOL bPause = (fEnable)? FALSE :TRUE;
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m_pCommChannel->PauseNetworkStream(bPause);
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m_pCommChannel->EnableOpen(fEnable);
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}
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}
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BOOL CAudioControl::IsXferEnabled()
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{
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return m_fXfer;
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}
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VOID CAudioControl::Pause(BOOL fPause)
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{
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m_fPaused = fPause;
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if (m_fPaused)
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{
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EnableXfer(FALSE);
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}
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else
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{
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EnableXfer(TRUE);
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}
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}
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BOOL CAudioControl::Initialize(IH323CallControl *pNac, IMediaChannel *,
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DWORD dwUser)
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{
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HRESULT hr;
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m_fChannelOpen = FALSE;
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m_fOpenPending = m_fReopenPending = FALSE;
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m_fPaused = TRUE;
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EnableXfer(FALSE); // need to store state locally, set it in OnChannelOpen
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return TRUE;
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}
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VOID CAudioControl::OnConnected(IH323Endpoint * lpConnection, ICommChannel *pIChannel)
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{
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m_pConnection = lpConnection;
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m_fOpenPending = m_fReopenPending = m_fClosePending = FALSE;
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ChanInitialize(pIChannel);
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}
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VOID CAudioControl::OnChannelOpened(ICommChannel *pIChannel)
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{
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m_fChannelOpen = TRUE;
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m_fOpenPending = m_fReopenPending = FALSE;
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if(!m_pMediaStream)
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{
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m_pMediaStream = m_pCommChannel->GetMediaChannel();
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ASSERT(m_pMediaStream);
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}
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if (m_fLocal || m_fXfer) // start streams always if sending, or if transfer is enabled
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{
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EnableXfer(TRUE);
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}
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else
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{
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EnableXfer(FALSE);
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}
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}
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VOID CAudioControl::OnChannelError()
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{
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m_fOpenPending = FALSE;
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}
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VOID CAudioControl::OnChannelClosed()
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{
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HRESULT hr;
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m_fChannelOpen = FALSE;
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if(m_fLocal && m_fReopenPending)
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{
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m_fReopenPending = FALSE;
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if(m_NewFormat != INVALID_MEDIA_FORMAT )
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{
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m_fOpenPending = TRUE;
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hr = m_pCommChannel->Open(m_NewFormat, m_pConnection);
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if(FAILED(hr))
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m_fOpenPending = FALSE;
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}
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}
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else
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{
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if(m_pCommChannel)
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{
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m_pCommChannel->Release();
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m_pCommChannel = NULL;
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}
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}
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}
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VOID CAudioControl::OnDisconnected()
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{
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m_pConnection = NULL;
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}
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