69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
// Copyright (c) 1999 Microsoft Corporation. All rights reserved.
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//
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// Declaration of CLyricTrack.
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//
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// This track type holds events that send DMUS_LYRIC_PMSG notifications at
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// specific points during playback of a segment.
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#pragma once
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#include "trackhelp.h"
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#include "tlist.h"
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#include "smartref.h"
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#include "dmusicf.h"
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//////////////////////////////////////////////////////////////////////
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// Types
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// Items in list of events
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struct LyricInfo
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{
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LyricInfo() : dwFlags(0), dwTimingFlags(0), lTriggerTime(0), lTimePhysical(0) {}
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HRESULT Clone(const LyricInfo &o, MUSIC_TIME mtStart)
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{
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*this = o;
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lTriggerTime -= mtStart;
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lTimePhysical -= mtStart;
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return S_OK;
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}
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DWORD dwFlags;
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DWORD dwTimingFlags;
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MUSIC_TIME lTriggerTime; // Logical time
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MUSIC_TIME lTimePhysical;
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SmartRef::WString wstrText;
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};
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//////////////////////////////////////////////////////////////////////
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// CLyricsTrack
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class CLyricsTrack;
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typedef CPlayingTrack<CLyricsTrack, LyricInfo> CLyricsTrackBase;
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class CLyricsTrack
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: public CLyricsTrackBase
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{
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public:
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// When the lyric track plays one of its items, it sends a Lyric PMsg through its segment state. If an invalidation occurs,
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// the PMsg is retracted by the performance. Then the track is played again (with the FLUSH bit set). The last pameter to
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// the CSegTriggerTrackBase is true, which instructs it to play the item a second time--to replace the retracted lyric.
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CLyricsTrack(HRESULT *pHr) : CLyricsTrackBase(&g_cComponent, CLSID_DirectMusicLyricsTrack, false, true) {}
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protected:
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HRESULT PlayItem(
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const LyricInfo &item,
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statedata &state,
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IDirectMusicPerformance *pPerf,
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IDirectMusicSegmentState* pSegSt,
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DWORD dwVirtualID,
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MUSIC_TIME mtOffset,
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REFERENCE_TIME rtOffset,
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bool fClockTime);
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HRESULT LoadRiff(SmartRef::RiffIter &ri, IDirectMusicLoader *pIDMLoader);
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private:
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HRESULT LoadLyric(SmartRef::RiffIter ri);
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};
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