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Suspend plugin when changing sample rate/buffer size

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Some plugins ignore updates to these values if they're changed while the plugin is in a "resumed" state, resulting in incorrect tuning after a change of sample rate.
This commit is contained in:
DomClark
2018-08-14 20:04:59 +01:00
committed by Hyunjin Song
parent 6f32c962b4
commit de427bbcf8
1 changed files with 34 additions and 2 deletions
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36
plugins/vst_base/RemoteVstPlugin.cpp
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@@ -147,6 +147,7 @@ public:
// set given sample-rate for plugin
virtual void updateSampleRate()
{
SuspendPlugin suspend( this );
pluginDispatch( effSetSampleRate, 0, 0,
NULL, (float) sampleRate() );
}
@@ -154,9 +155,20 @@ public:
// set given buffer-size for plugin
virtual void updateBufferSize()
{
SuspendPlugin suspend( this );
pluginDispatch( effSetBlockSize, 0, bufferSize() );
}
void setResumed( bool resumed )
{
m_resumed = resumed;
pluginDispatch( effMainsChanged, 0, resumed ? 1 : 0 );
}
inline bool isResumed() const
{
return m_resumed;
}
inline bool isInitialized() const
{
@@ -309,6 +321,24 @@ private:
ClosePlugin
} ;
struct SuspendPlugin {
SuspendPlugin( RemoteVstPlugin * plugin ) :
m_plugin( plugin ),
m_resumed( plugin->isResumed() )
{
if( m_resumed ) { m_plugin->setResumed( false ); }
}
~SuspendPlugin()
{
if( m_resumed ) { m_plugin->setResumed( true ); }
}
private:
RemoteVstPlugin * m_plugin;
bool m_resumed;
};
// callback used by plugin for being able to communicate with it's host
static intptr_t hostCallback( AEffect * _effect, int32_t _opcode,
int32_t _index, intptr_t _value,
@@ -339,6 +369,7 @@ private:
int m_windowHeight;
bool m_initialized;
bool m_resumed;
bool m_processing;
@@ -390,6 +421,7 @@ RemoteVstPlugin::RemoteVstPlugin( const char * socketPath ) :
m_windowWidth( 0 ),
m_windowHeight( 0 ),
m_initialized( false ),
m_resumed( false ),
m_processing( false ),
m_messageList(),
m_shouldGiveIdle( false ),
@@ -470,7 +502,7 @@ RemoteVstPlugin::RemoteVstPlugin( const char * socketPath ) :
RemoteVstPlugin::~RemoteVstPlugin()
{
destroyEditor();
pluginDispatch( effMainsChanged, 0, 0 );
setResumed( false );
pluginDispatch( effClose );
#ifndef USE_QT_SHMEM
// detach shared memory segment
@@ -648,7 +680,7 @@ void RemoteVstPlugin::init( const std::string & _plugin_file )
pluginDispatch( effSetProgram, 0, 0 ); */
// request rate and blocksize
pluginDispatch( effMainsChanged, 0, 1 );
setResumed( true );
debugMessage( "creating editor\n" );
initEditor();