cwFlow.h/cpp,cwFlowTypes.h : Split create() into two functions create() and intitialize() to allow the

audio device to be reconfigured after the sample rate and dspFrameCnt are parsed
from the program cfg.

cwFlow.cpp

@@ -666,15 +666,10 @@ cw::rc_t cw::flow::create( handle_t&          hRef,
                            const object_t*    classCfg,
                            const object_t*    flowCfg,
                            const object_t*    subnetCfg,
-                           const char*        proj_dir,
+                           const char*        proj_dir )
-                           external_device_t* deviceA,
-                           unsigned           deviceN )
 {
   rc_t            rc               = kOkRC;
-  const object_t* networkCfg       = nullptr; 
   bool            printClassDictFl = false;
-  bool            printNetworkFl   = false;
-  variable_t*     proxyVarL        = nullptr;
   unsigned        maxCycleCount    = kInvalidCnt;
   double          durLimitSecs     = 0;
   
@@ -682,9 +677,6 @@ cw::rc_t cw::flow::create( handle_t&          hRef,
     return rc;
 
   flow_t* p   = mem::allocZ<flow_t>();
-  p->flowCfg    = flowCfg;   // TODO: duplicate cfg?
-  p->deviceA    = deviceA;
-  p->deviceN    = deviceN;
 
   // parse the class description array
   if((rc = _parse_class_cfg(p,classCfg)) != kOkRC )
@@ -702,13 +694,14 @@ cw::rc_t cw::flow::create( handle_t&          hRef,
     }
 
 
+  p->flowCfg        = flowCfg;
   p->framesPerCycle = kDefaultFramesPerCycle;
   p->sample_rate    = kDefaultSampleRate;
   p->maxCycleCount  = kInvalidCnt;
   p->proj_dir       = proj_dir;
   
   // parse the optional args
-  if((rc = flowCfg->readv("network",              0,      networkCfg,
+  if((rc = flowCfg->readv("network",              0,      p->networkCfg,
                           "non_real_time_fl",     kOptFl, p->non_real_time_fl,
                           "framesPerCycle",       kOptFl, p->framesPerCycle,
                           "sample_rate",          kOptFl, p->sample_rate,
@@ -716,7 +709,7 @@ cw::rc_t cw::flow::create( handle_t&          hRef,
                           "durLimitSecs",         kOptFl, durLimitSecs,
                           "preset",               kOptFl, p->init_net_preset_label,
                           "printClassDictFl",     kOptFl, printClassDictFl,
-                          "printNetworkFl",       kOptFl, printNetworkFl,
+                          "printNetworkFl",       kOptFl, p->printNetworkFl,
                           "multiPriPresetProbFl", kOptFl, p->multiPriPresetProbFl,
                           "multiSecPresetProbFl", kOptFl, p->multiSecPresetProbFl,
                           "multiPresetInterpFl",  kOptFl, p->multiPresetInterpFl)) != kOkRC )
@@ -736,6 +729,31 @@ cw::rc_t cw::flow::create( handle_t&          hRef,
       p->maxCycleCount = (unsigned)((durLimitSecs * p->sample_rate) / p->framesPerCycle);    
   }
 
+  // print the class dict
+  if( printClassDictFl )
+      class_dict_print( p );
+  
+  hRef.set(p);
+  
+ errLabel:
+  
+  if( rc != kOkRC )
+    _destroy(p);
+  
+  return rc;  
+}
+
+cw::rc_t cw::flow::initialize( handle_t h,
+                               external_device_t* deviceA,
+                               unsigned           deviceN )
+{
+  rc_t        rc        = kOkRC;
+  variable_t* proxyVarL = nullptr;
+  flow_t*     p         = _handleToPtr(h);
+  
+  p->deviceA    = deviceA;
+  p->deviceN    = deviceN;
+  
   for(unsigned i=0; i<deviceN; ++i)
     if( deviceA[i].typeId == kAudioDevTypeId )
     {
@@ -749,18 +767,14 @@ cw::rc_t cw::flow::create( handle_t&          hRef,
           cwLogWarning("The audio frame count (%i) for audio device '%s' does not match the Flow framesPerCycle (%i).",deviceA[i].u.a.abuf->frameN,p->framesPerCycle);
     }
   
-  // print the class dict
-  if( printClassDictFl )
-      class_dict_print( p );
-
   // instantiate the network
-  if((rc = network_create(p,networkCfg,p->net,proxyVarL)) != kOkRC )
+  if((rc = network_create(p,p->networkCfg,p->net,proxyVarL)) != kOkRC )
   {
     rc = cwLogError(rc,"Network creation failed.");
     goto errLabel;
   }
 
-  if( printNetworkFl )
+  if( p->printNetworkFl )
     network_print(p->net);
 
   if( p->init_net_preset_label != nullptr )
@@ -769,17 +783,15 @@ cw::rc_t cw::flow::create( handle_t&          hRef,
   p->isInRuntimeFl = true;
   cwLogInfo("Entering runtime.");
 
-  hRef.set(p);
-  
  errLabel:
-
   
   if( rc != kOkRC )
     _destroy(p);
   
-  return rc;  
+  return rc;   
 }
 
+
 cw::rc_t cw::flow::destroy( handle_t& hRef )
 {
   rc_t    rc = kOkRC;
@@ -803,6 +815,19 @@ bool cw::flow::is_non_real_time( handle_t h )
   return p->non_real_time_fl;
 }
 
+double   cw::flow::sample_rate(      handle_t h )
+{
+  flow_t* p = _handleToPtr(h);
+  return p->sample_rate;
+}
+
+unsigned cw::flow::frames_per_cycle( handle_t h )
+{
+  flow_t* p = _handleToPtr(h);
+  return p->framesPerCycle;  
+}
+
+
 unsigned cw::flow::preset_cfg_flags( handle_t h )
 {
   flow_t*  p     = _handleToPtr(h);

cwFlow.h

@@ -8,23 +8,30 @@ namespace cw
 
     typedef handle<struct flow_str> handle_t;
 
-
-
     void print_abuf( const struct abuf_str* abuf );
     void print_external_device( const external_device_t* dev );
     
+    // Parse the cfg's but don't yet instantiate the network.
+    // Upon completion of this function the caller can 
+    // query the network for configuration information which can
+    // be used to setup the extern_device_t array.
+    rc_t create(handle_t&          hRef,
+                   const object_t*    classCfg,
+                   const object_t*    networkCfg,
+                   const object_t*    subnetCfg = nullptr,
+                   const char*        projDir   = nullptr);
 
-    rc_t create( handle_t&          hRef,
+    // Instantiate the network and prepare for runtime.
-                 const object_t*    classCfg,
+    rc_t initialize( handle_t           handle,
-                 const object_t*    networkCfg,
+                     external_device_t* deviceA   = nullptr,
-                 const object_t*    subnetCfg = nullptr,
+                     unsigned           deviceN   = 0);
-                 const char*        projDir   = nullptr,
+    
-                 external_device_t* deviceA   = nullptr,
-                 unsigned           deviceN   = 0);
-
     rc_t destroy( handle_t& hRef );
 
-    bool is_non_real_time( handle_t h );
+    // Network cfg. information which is available following configure().
+    bool     is_non_real_time( handle_t h );
+    double   sample_rate(      handle_t h );
+    unsigned frames_per_cycle( handle_t h );
 
     unsigned preset_cfg_flags( handle_t h );
 

cwFlowTypes.h

@@ -323,14 +323,17 @@ namespace cw
       // Preset pair table used by network_apply_dual_preset()
       network_preset_pair_t* preset_pairA;
       unsigned               preset_pairN;
-      
+
     } network_t;
     
     
     typedef struct flow_str
     {
       const object_t*      flowCfg;     // complete cfg used to create this flow
-      
+      const object_t*      networkCfg;  // 'network' cfg from flowCfg
+
+      bool                 printNetworkFl;
+
       bool                 non_real_time_fl;     // set if this is a non-real-time program
       unsigned             framesPerCycle;       // sample frames per cycle (64)
       srate_t              sample_rate;          // default sample rate (48000.0)
@@ -339,9 +342,7 @@ namespace cw
       
       bool                 isInRuntimeFl;        // Set when compile-time is complete
       
-      
       unsigned             cycleIndex;           // Incremented with each processing cycle      
-
       
       bool                 multiPriPresetProbFl; // If set then probability is used to choose presets on multi-preset application
       bool                 multiSecPresetProbFl; //