--- qsampler/trunk/src/qsamplerChannel.cpp	2005/02/11 15:36:06	371
+++ qsampler/trunk/src/qsamplerChannel.cpp	2005/02/21 15:02:58	400
@@ -45,8 +45,8 @@
     m_pMainForm  = pMainForm;
     m_iChannelID = iChannelID;
 
-//  m_sEngineName       = QObject::tr("(No engine)");
-//  m_sInstrumentName   = QObject::tr("(No instrument)");
+//  m_sEngineName       = noEngineName();
+//  m_sInstrumentName   = noInstrumentName();
 //  m_sInstrumentFile   = m_sInstrumentName;
     m_iInstrumentNr     = -1;
     m_iInstrumentStatus = -1;
@@ -159,7 +159,9 @@
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
-
+	if (m_iInstrumentStatus == 100 && m_sEngineName == sEngineName)
+	    return true;
+	    
     if (::lscp_load_engine(client(), sEngineName.latin1(), m_iChannelID) != LSCP_OK) {
         appendMessagesClient("lscp_load_engine");
         return false;
@@ -170,12 +172,6 @@
 }
 
 
-// Instrument name accessor.
-QString& qsamplerChannel::instrumentName (void)
-{
-    return m_sInstrumentName;
-}
-
 // Instrument filename accessor.
 QString& qsamplerChannel::instrumentFile (void)
 {
@@ -188,6 +184,12 @@
     return m_iInstrumentNr;
 }
 
+// Instrument name accessor.
+QString& qsamplerChannel::instrumentName (void)
+{
+    return m_sInstrumentName;
+}
+
 // Instrument status accessor.
 int qsamplerChannel::instrumentStatus (void)
 {
@@ -199,18 +201,33 @@
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
+	if (!isInstrumentFile(sInstrumentFile))
+	    return false;
+	if (m_iInstrumentStatus == 100 && m_sInstrumentFile == sInstrumentFile && m_iInstrumentNr == iInstrumentNr)
+	    return true;
 
     if (::lscp_load_instrument_non_modal(client(), sInstrumentFile.latin1(), iInstrumentNr, m_iChannelID) != LSCP_OK) {
         appendMessagesClient("lscp_load_instrument");
         return false;
     }
 
-    m_sInstrumentName = getInstrumentName(sInstrumentFile, iInstrumentNr, true);
+    return setInstrument(sInstrumentFile, iInstrumentNr);
+}
+
+
+// Special instrument file/name/number settler.
+bool qsamplerChannel::setInstrument ( const QString& sInstrumentFile, int iInstrumentNr )
+{
     m_sInstrumentFile = sInstrumentFile;
     m_iInstrumentNr = iInstrumentNr;
+#ifdef CONFIG_INSTRUMENT_NAME
+    m_sInstrumentName = QString::null;  // We'll get it, maybe later, on channel_info...
+#else
+    m_sInstrumentName = getInstrumentName(sInstrumentFile, iInstrumentNr, true);
+#endif
     m_iInstrumentStatus = 0;
 
-    return true;
+	return true;
 }
 
 
@@ -224,6 +241,8 @@
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
+	if (m_iInstrumentStatus == 100 && m_sMidiDriver == sMidiDriver)
+	    return true;
 
     if (::lscp_set_channel_midi_type(client(), m_iChannelID, sMidiDriver.latin1()) != LSCP_OK) {
         appendMessagesClient("lscp_set_channel_midi_type");
@@ -245,6 +264,8 @@
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
+	if (m_iInstrumentStatus == 100 && m_iMidiDevice == iMidiDevice)
+	    return true;
 
     if (::lscp_set_channel_midi_device(client(), m_iChannelID, iMidiDevice) != LSCP_OK) {
         appendMessagesClient("lscp_set_channel_midi_device");
@@ -266,6 +287,8 @@
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
+	if (m_iInstrumentStatus == 100 && m_iMidiPort == iMidiPort)
+	    return true;
 
     if (::lscp_set_channel_midi_port(client(), m_iChannelID, iMidiPort) != LSCP_OK) {
         appendMessagesClient("lscp_set_channel_midi_port");
@@ -287,6 +310,8 @@
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
+	if (m_iInstrumentStatus == 100 && m_iMidiChannel == iMidiChannel)
+	    return true;
 
     if (::lscp_set_channel_midi_channel(client(), m_iChannelID, iMidiChannel) != LSCP_OK) {
         appendMessagesClient("lscp_set_channel_midi_channel");
@@ -308,6 +333,8 @@
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
+	if (m_iInstrumentStatus == 100 && m_iAudioDevice == iAudioDevice)
+	    return true;
 
     if (::lscp_set_channel_audio_device(client(), m_iChannelID, iAudioDevice) != LSCP_OK) {
         appendMessagesClient("lscp_set_channel_audio_device");
@@ -329,6 +356,8 @@
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
+	if (m_iInstrumentStatus == 100 && m_sAudioDriver == sAudioDriver)
+	    return true;
 
     if (::lscp_set_channel_audio_type(client(), m_iChannelID, sAudioDriver.latin1()) != LSCP_OK) {
         appendMessagesClient("lscp_set_channel_audio_type");
@@ -350,6 +379,8 @@
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
+	if (m_iInstrumentStatus == 100 && m_fVolume == fVolume)
+	    return true;
 
     if (::lscp_set_channel_volume(client(), m_iChannelID, fVolume) != LSCP_OK) {
         appendMessagesClient("lscp_set_channel_volume");
@@ -364,8 +395,10 @@
 // Istrument name remapper.
 void qsamplerChannel::updateInstrumentName (void)
 {
+#ifndef CONFIG_INSTRUMENT_NAME
 	m_sInstrumentName = getInstrumentName(m_sInstrumentFile,
 		m_iInstrumentNr, (options() && options()->bInstrumentNames));
+#endif
 }
 
 
@@ -383,6 +416,12 @@
         return false;
     }
 
+#ifdef CONFIG_INSTRUMENT_NAME
+	// We got all actual instrument datum...
+	m_sInstrumentFile = pChannelInfo->instrument_file;
+	m_iInstrumentNr   = pChannelInfo->instrument_nr;
+	m_sInstrumentName = pChannelInfo->instrument_name;
+#else
 	// First, check if intrument name has changed,
 	// taking care that instrument name lookup might be expensive,
 	// so we better make it only once and when really needed...
@@ -392,6 +431,7 @@
 		m_iInstrumentNr   = pChannelInfo->instrument_nr;
 		updateInstrumentName();
 	}
+#endif
     // Cache in other channel information.
     m_sEngineName       = pChannelInfo->engine_name;
     m_iInstrumentStatus = pChannelInfo->instrument_status;
@@ -413,7 +453,7 @@
 
 
 // Reset channel method.
-bool qsamplerChannel::resetChannel (void)
+bool qsamplerChannel::channelReset (void)
 {
     if (client() == NULL || m_iChannelID < 0)
         return false;
@@ -478,15 +518,35 @@
 }
 
 
+// FIXME: Check whether a given file is an instrument file.
+bool qsamplerChannel::isInstrumentFile ( const QString& sInstrumentFile )
+{
+	bool bResult = false;
+
+	QFile file(sInstrumentFile);
+	if (file.open(IO_ReadOnly)) {
+		char achHeader[4];
+		if (file.readBlock(achHeader, 4)) {
+			bResult = (achHeader[0] == 'R'
+					&& achHeader[1] == 'I'
+					&& achHeader[2] == 'F'
+					&& achHeader[3] == 'F');
+		}
+		file.close();
+	}
+
+	return bResult;
+}
+
+
 // Retrieve the instrument list of a instrument file (.gig).
 QStringList qsamplerChannel::getInstrumentList( const QString& sInstrumentFile,
 	bool bInstrumentNames )
 {
-    QFileInfo fileinfo(sInstrumentFile);
-    QString sInstrumentName = fileinfo.fileName();
+    QString sInstrumentName = QFileInfo(sInstrumentFile).fileName();
     QStringList instlist;
 
-    if (fileinfo.exists()) {
+    if (isInstrumentFile(sInstrumentFile)) {
 #ifdef CONFIG_LIBGIG
 		if (bInstrumentNames) {
 	        RIFF::File *pRiff = new RIFF::File(sInstrumentFile);
@@ -504,7 +564,7 @@
         for (int iInstrumentNr = 0; iInstrumentNr < QSAMPLER_INSTRUMENT_MAX; iInstrumentNr++)
             instlist.append(sInstrumentName + " [" + QString::number(iInstrumentNr) + "]");
     }
-    else instlist.append(sInstrumentName);
+    else instlist.append(noInstrumentName());
 
     return instlist;
 }
@@ -514,10 +574,10 @@
 QString qsamplerChannel::getInstrumentName( const QString& sInstrumentFile,
 	int iInstrumentNr, bool bInstrumentNames )
 {
-    QFileInfo fileinfo(sInstrumentFile);
-    QString sInstrumentName = fileinfo.fileName();
+    QString sInstrumentName;
 
-    if (fileinfo.exists()) {
+    if (isInstrumentFile(sInstrumentFile)) {
+		sInstrumentName = QFileInfo(sInstrumentFile).fileName();
 #ifdef CONFIG_LIBGIG
 		if (bInstrumentNames) {
 	        RIFF::File *pRiff = new RIFF::File(sInstrumentFile);
@@ -539,9 +599,22 @@
 #endif
         sInstrumentName += " [" + QString::number(iInstrumentNr) + "]";
     }
+    else sInstrumentName = noInstrumentName();
 
     return sInstrumentName;
 }
 
 
+// Common invalid name-helpers.
+QString qsamplerChannel::noEngineName (void)
+{
+	return QObject::tr("(No engine)");
+}
+
+QString qsamplerChannel::noInstrumentName (void)
+{
+	return QObject::tr("(No instrument)");
+}
+
+
 // end of qsamplerChannel.cpp