a JACK-specific flag to disable automatic connection of ports

RtAudio.cpp

@@ -1943,7 +1943,7 @@ struct JackHandle {
 static void jackSilentError( const char * ) {};
 
 RtApiJack :: RtApiJack()
-{
+    :shouldAutoconnect_(true) {
   // Nothing to do here.
 #if !defined(__RTAUDIO_DEBUG__)
   // Turn off Jack's internal error reporting.
@@ -2354,6 +2354,8 @@ bool RtApiJack :: probeDeviceOpen( unsigned int device, StreamMode mode, unsigne
   // here.
   if ( stream_.doConvertBuffer[mode] ) setConvertInfo( mode, 0 );
 
+  if ( options && options->flags & RTAUDIO_JACK_DONT_CONNECT ) shouldAutoconnect_ = false;
+
   return SUCCESS;
 
  error:
@@ -2443,7 +2445,7 @@ void RtApiJack :: startStream( void )
   const char **ports;
 
   // Get the list of available ports.
-  if ( stream_.mode == OUTPUT || stream_.mode == DUPLEX ) {
+  if ( shouldAutoconnect_ && (stream_.mode == OUTPUT || stream_.mode == DUPLEX) ) {
     result = 1;
     ports = jack_get_ports( handle->client, handle->deviceName[0].c_str(), NULL, JackPortIsInput);
     if ( ports == NULL) {
@@ -2467,7 +2469,7 @@ void RtApiJack :: startStream( void )
     free(ports);
   }
 
-  if ( stream_.mode == INPUT || stream_.mode == DUPLEX ) {
+  if ( shouldAutoconnect_ && (stream_.mode == INPUT || stream_.mode == DUPLEX) ) {
     result = 1;
     ports = jack_get_ports( handle->client, handle->deviceName[1].c_str(), NULL, JackPortIsOutput );
     if ( ports == NULL) {

RtAudio.h

@@ -86,6 +86,7 @@ static const RtAudioFormat RTAUDIO_FLOAT64 = 0x20; // Normalized between plus/mi
     - \e RTAUDIO_MINIMIZE_LATENCY: Attempt to set stream parameters for lowest possible latency.
     - \e RTAUDIO_HOG_DEVICE:       Attempt grab device for exclusive use.
     - \e RTAUDIO_ALSA_USE_DEFAULT: Use the "default" PCM device (ALSA only).
+    - \e RTAUDIO_JACK_DONT_CONNECT: Do not automatically connect ports (JACK only).
 
     By default, RtAudio streams pass and receive audio data from the
     client in an interleaved format.  By passing the
@@ -117,6 +118,9 @@ static const RtAudioFormat RTAUDIO_FLOAT64 = 0x20; // Normalized between plus/mi
     If the RTAUDIO_ALSA_USE_DEFAULT flag is set, RtAudio will attempt to
     open the "default" PCM device when using the ALSA API. Note that this
     will override any specified input or output device id.
+
+    If the RTAUDIO_JACK_DONT_CONNECT flag is set, RtAudio will not attempt
+    to automatically connect the ports of the client to the audio device.
 */
 typedef unsigned int RtAudioStreamFlags;
 static const RtAudioStreamFlags RTAUDIO_NONINTERLEAVED = 0x1;    // Use non-interleaved buffers (default = interleaved).
@@ -124,6 +128,7 @@ static const RtAudioStreamFlags RTAUDIO_MINIMIZE_LATENCY = 0x2;  // Attempt to s
 static const RtAudioStreamFlags RTAUDIO_HOG_DEVICE = 0x4;        // Attempt grab device and prevent use by others.
 static const RtAudioStreamFlags RTAUDIO_SCHEDULE_REALTIME = 0x8; // Try to select realtime scheduling for callback thread.
 static const RtAudioStreamFlags RTAUDIO_ALSA_USE_DEFAULT = 0x10; // Use the "default" PCM device (ALSA only).
+static const RtAudioStreamFlags RTAUDIO_JACK_DONT_CONNECT = 0x20; // Do not automatically connect ports (JACK only).
 
 /*! \typedef typedef unsigned long RtAudioStreamStatus;
     \brief RtAudio stream status (over- or underflow) flags.
@@ -912,6 +917,8 @@ public:
                         unsigned int firstChannel, unsigned int sampleRate,
                         RtAudioFormat format, unsigned int *bufferSize,
                         RtAudio::StreamOptions *options );
+
+  bool shouldAutoconnect_;
 };
 
 #endif