109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
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// Copyright (c) 1998-1999 Microsoft Corporation
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/* This is a class to manage tracking mutes for the SeqTrack and BandTrack. */
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#include "PChMap.h"
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#include "dmusicf.h"
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CPChMap::CPChMap()
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{
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}
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CPChMap::~CPChMap()
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{
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}
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// Reset sets all item's mtNext time values to -1, so they are gotten again.
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void CPChMap::Reset(void)
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{
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TListItem<PCHMAP_ITEM>* pItem;
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for( pItem = m_PChMapList.GetHead(); pItem; pItem = pItem->GetNext() )
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{
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PCHMAP_ITEM& rItem = pItem->GetItemValue();
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rItem.mtNext = -1;
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rItem.dwPChMap = rItem.dwPChannel;
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rItem.fMute = 0;
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}
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}
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// GetInfo calls the performance's GetData to get the current Mute Track information.
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// Reset() will be called upon any invalidation or seek, which will set the
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// internal times to -1 so this will be accurate in case of a new controlling segment.
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// You must provide the pfMute and pdwNewPCh parameters to this function, or
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// it will crash.
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void CPChMap::GetInfo( DWORD dwPCh, MUSIC_TIME mtTime, MUSIC_TIME mtOffset, DWORD dwGroupBits,
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IDirectMusicPerformance* pPerf, BOOL* pfMute, DWORD* pdwNewPCh, BOOL fClockTime )
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{
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TListItem<PCHMAP_ITEM>* pItem;
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for( pItem = m_PChMapList.GetHead(); pItem; pItem = pItem->GetNext() )
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{
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PCHMAP_ITEM& rCheck = pItem->GetItemValue();
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if( rCheck.dwPChannel == dwPCh ) break;
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}
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if( NULL == pItem )
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{
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PCHMAP_ITEM item;
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item.mtNext = -1;
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item.dwPChannel = item.dwPChMap = dwPCh;
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item.fMute = FALSE;
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pItem = new TListItem<PCHMAP_ITEM>(item);
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if( NULL == pItem )
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{
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// error, out of memory.
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*pfMute = FALSE;
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*pdwNewPCh = dwPCh;
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return;
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}
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m_PChMapList.AddHead(pItem);
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}
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PCHMAP_ITEM& rItem = pItem->GetItemValue();
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if( mtTime >= rItem.mtNext )
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{
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DMUS_MUTE_PARAM muteParam;
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MUSIC_TIME mtNext;
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muteParam.dwPChannel = dwPCh;
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if (fClockTime)
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{
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MUSIC_TIME mtMusic;
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REFERENCE_TIME rtTime = (mtTime + mtOffset) * 10000;
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pPerf->ReferenceToMusicTime(rtTime,&mtMusic);
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if( SUCCEEDED(pPerf->GetParam( GUID_MuteParam, dwGroupBits, 0, mtMusic,
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&mtNext, (void*)&muteParam )))
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{
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REFERENCE_TIME rtNext;
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// Convert to absolute reference time.
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pPerf->MusicToReferenceTime(mtNext + mtMusic,&rtNext);
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rtNext -= rtTime; // Subtract out to get the delta.
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rItem.mtNext = (MUSIC_TIME)(rtNext / 10000); // Convert to delta in milliseconds. BUGBUG What if there's a tempo change?
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rItem.dwPChMap = muteParam.dwPChannelMap;
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rItem.fMute = muteParam.fMute;
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}
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else
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{
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// no mute track, or no mute on this pchannel.
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// keep the current mapping.
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rItem.mtNext = 0x7fffffff;
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}
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}
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else
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{
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if( SUCCEEDED(pPerf->GetParam( GUID_MuteParam, dwGroupBits, 0, mtTime + mtOffset,
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&mtNext, (void*)&muteParam )))
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{
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rItem.mtNext = mtNext;
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rItem.dwPChMap = muteParam.dwPChannelMap;
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rItem.fMute = muteParam.fMute;
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}
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else
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{
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// no mute track, or no mute on this pchannel.
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// keep the current mapping.
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rItem.mtNext = 0x7fffffff;
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}
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}
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}
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*pfMute = rItem.fMute;
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*pdwNewPCh = rItem.dwPChMap;
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}
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