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CrySoundSystem/MusicPatternInstance.cpp

@@ -0,0 +1,76 @@
+#include "StdAfx.h"
+#include "musicpatterninstance.h"
+#include "MusicPattern.h"
+#include "PatternDecoder.h"
+
+CMusicPatternInstance::CMusicPatternInstance(CMusicPattern *pPattern)
+{
+	m_nRefs=0;
+	m_pPattern=pPattern;
+	if (m_pPattern)
+		m_pDecoderInstance=m_pPattern->CreateDecoderInstance();
+	else
+		m_pDecoderInstance=NULL;
+}
+
+CMusicPatternInstance::~CMusicPatternInstance()
+{
+	if (m_pDecoderInstance)
+		m_pDecoderInstance->Release();
+	m_pPattern->ReleaseInstance( this );
+}
+
+bool CMusicPatternInstance::Seek0(int nDelay)
+{
+	if (!m_pDecoderInstance)
+		return false;
+	return m_pDecoderInstance->Seek0(nDelay);
+}
+
+bool CMusicPatternInstance::GetPCMData(signed long *pDataOut, int nSamples, bool bLoop)
+{
+	if (!m_pDecoderInstance)
+		return false;
+	return m_pDecoderInstance->GetPCMData(pDataOut, nSamples, bLoop);
+}
+
+int CMusicPatternInstance::GetSamplesToNextFadePoint()
+{
+	if (!m_pDecoderInstance)
+		return false;
+	int nPos=m_pDecoderInstance->GetPos();
+	for (TMarkerVecIt It=m_pPattern->m_vecFadePoints.begin();It!=m_pPattern->m_vecFadePoints.end();++It)
+	{
+		int nFadePos=(*It);
+		if (nFadePos <= 0)
+		{
+			nFadePos = m_pPattern->m_nSamples + nFadePos;
+		}
+		if (nFadePos>nPos)
+			return nFadePos-nPos;
+	}
+	return GetSamplesToEnd();
+}
+
+int CMusicPatternInstance::GetSamplesToLastFadePoint()
+{
+	if (!m_pDecoderInstance)
+		return false;
+	int nPos=m_pDecoderInstance->GetPos();
+	if (m_pPattern->m_vecFadePoints.empty())
+		return GetSamplesToEnd();
+	
+	int nFadePos = (*(m_pPattern->m_vecFadePoints.end()-1));
+	if (nFadePos <= 0)
+	{
+		nFadePos = m_pPattern->m_nSamples + nFadePos;
+	}
+	return nFadePos - nPos;
+}
+
+int CMusicPatternInstance::GetSamplesToEnd()
+{
+	if (m_pDecoderInstance != NULL && m_pPattern != NULL)
+		return m_pPattern->m_nSamples - m_pDecoderInstance->GetPos();
+	return -1;
+}