Added libsndfile support for loading multiple audio formats

SpiralSound/Plugins/PoshSamplerPlugin/PoshSamplerPlugin.C

@@ -19,10 +19,11 @@
 #include "PoshSamplerPluginGUI.h"
 #include <FL/Fl_Button.h>
 #include "SpiralIcon.xpm"
-#include "../../RiffWav.h"
 #include "../../NoteTable.h"
 #include <stdio.h>
 
+#include "../../RiffWav.h"
+
 using namespace std;
 
 static const int   NOTETRIG    = NUM_SAMPLES*2+1;
@@ -398,6 +399,56 @@ void PoshSamplerPlugin::StreamIn(istream &s)
 
 void PoshSamplerPlugin::LoadSample(int n, const string &Name)
 {
+#ifdef USE_LIBSNDFILE
+	SNDFILE *m_FileHandle = NULL;
+	SF_INFO m_FileInfo;
+
+	m_FileInfo.format = 0;
+	
+	m_FileHandle = sf_open (Name.c_str(), SFM_READ, &m_FileInfo);
+
+	if (m_FileHandle == NULL)
+	{
+		cerr<<"PoshSamplerPlugin: File ["<<Name<<"] does not exist"<<endl;
+		return;
+	}
+
+	m_SampleVec[n]->Allocate(m_FileInfo.frames);
+
+	float *TempBuf = new float[m_FileInfo.frames*m_FileInfo.channels];
+	if (m_FileInfo.frames*m_FileInfo.channels!= sf_read_float(m_FileHandle, TempBuf, m_FileInfo.frames*m_FileInfo.channels))
+	{
+		cerr<<"PoshSamplerPlugin: File ["<<Name<<"] Read error"<<endl;
+		return;
+	}
+
+	for (int i=0; i<m_FileInfo.frames; i++)
+	{
+		float value=0;
+
+		if (m_FileInfo.channels>1) // mix the channels into a mono buffer
+		{
+			for (int j=0; j<m_FileInfo.channels; j++)
+				value += TempBuf[(i*m_FileInfo.channels)+j];
+
+			value/=m_FileInfo.channels;
+
+			m_SampleVec[i]->Set(i,value);
+		} else 
+			m_SampleVec[i]->Set(i,TempBuf[i]);
+	
+	}
+
+	delete[] TempBuf;
+
+	sf_close(m_FileHandle); 
+	m_FileHandle = NULL;
+
+	m_SampleDescVec[n]->SampleRate=m_FileInfo.samplerate;
+	m_SampleDescVec[n]->Stereo=(m_FileInfo.channels > 1);
+	m_SampleDescVec[n]->Pitch *= m_SampleDescVec[n]->SampleRate/(float)m_HostInfo->SAMPLERATE;
+	m_SampleDescVec[n]->LoopEnd=m_SampleVec[n]->GetLength()-1;
+#else
 	WavFile Wav;
 	if (Wav.Open(Name,WavFile::READ))
 	{
@@ -409,6 +460,7 @@ void PoshSamplerPlugin::LoadSample(int n, const string &Name)
 		m_SampleDescVec[n]->Pitch *= m_SampleDescVec[n]->SampleRate/(float)m_HostInfo->SAMPLERATE;
 		m_SampleDescVec[n]->LoopEnd=m_SampleVec[n]->GetLength()-1;
 	}
+#endif
 }
 
 void PoshSamplerPlugin::SaveSample(int n, const string &Name)