From 7db4474dd58b75bf43344dbb311728b270f6d192 Mon Sep 17 00:00:00 2001
From: kpl <kevin@larke.org>
Date: Thu, 13 Feb 2020 11:30:46 -0500
Subject: [PATCH] cwIo.h/cpp/test : Added initial audio implemetation.

---
 cwIo.cpp     | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 cwIo.h       |  6 ++++-
 cwIoTest.cpp |  9 +++++++
 3 files changed, 80 insertions(+), 2 deletions(-)

diff --git a/cwIo.cpp b/cwIo.cpp
index fd4ad33..858b93b 100644
--- a/cwIo.cpp
+++ b/cwIo.cpp
@@ -15,6 +15,10 @@
 #include "cwSerialPort.h"
 #include "cwSerialPortSrv.h"
 
+#include "cwAudioDevice.h"
+#include "cwAudioBuf.h"
+#include "cwAudioDeviceAlsa.h"
+
 
 namespace cw
 {
@@ -41,7 +45,11 @@ namespace cw
       serialPort_t*          serialA;
       unsigned               serialN;
       
-      midi::device::handle_t midiH;      
+      midi::device::handle_t midiH;
+
+      audio::device::handle_t       audioH;
+      audio::device::alsa::handle_t alsaH;
+      
     } io_t;
   
 
@@ -215,6 +223,59 @@ namespace cw
       
       return rc;
     }
+
+    void _audioDeviceCallback( void* cbArg, audio::device::audioPacket_t* inPktArray, unsigned inPktCnt, audio::device::audioPacket_t* outPktArray, unsigned outPktCnt )
+    {
+    }
+
+    rc_t _audioDeviceConfig( io_t* p, const object_t* c )
+    {
+      rc_t rc = kOkRC;
+      
+      
+      
+      return rc;
+    }
+
+
+    rc_t _audioDeviceCreate( io_t* p, const object_t*& c )
+    {      
+      rc_t                     rc       = kOkRC;
+      audio::device::driver_t* audioDrv = nullptr;
+
+      // initialize the audio device interface  
+      if((rc = audio::device::create(p->audioH)) != kOkRC )
+      {
+        cwLogInfo("Initialize failed.");
+        goto errLabel;
+      }
+
+      // initialize the ALSA device driver interface
+      if((rc = audio::device::alsa::create(p->alsaH, audioDrv )) != kOkRC )
+      {
+        cwLogInfo("ALSA initialize failed.");
+        goto errLabel;
+      }
+
+      // register the ALSA device driver with the audio interface
+      if((rc = audio::device::registerDriver( p->audioH, audioDrv )) != kOkRC )
+      {
+        cwLogInfo("ALSA driver registration failed.");
+        goto errLabel;
+      }
+
+      // 
+      if((rc = _audioDeviceConfig( p, c )) != kOkRC )
+      {
+        cwLogInfo("Audio device configuration failed.");
+        goto errLabel;
+      }
+
+
+    errLabel:
+      return rc;
+    }
+
   }
 }
 
@@ -253,6 +314,10 @@ cw::rc_t cw::io::create( handle_t& h, const char* cfgStr, cbFunc_t cbFunc, void*
   // create the MIDI port device
   if((rc = _midiPortCreate(p,o)) != kOkRC )
     goto errLabel;
+
+  // create the Audio device interface
+  if((rc = _audioDeviceCreate(p,o)) != kOkRC )
+    goto errLabel;
   
   // create the the thread
   if((rc = thread::create( p->threadH, _mainThreadFunc, p)) != kOkRC )
diff --git a/cwIo.h b/cwIo.h
index f5e45b3..9a335b7 100644
--- a/cwIo.h
+++ b/cwIo.h
@@ -43,7 +43,7 @@ namespace cw
       
     rc_t create(
       handle_t&   h,
-      const char* cfgStr,
+      const char* cfgStr,      // configuration information as text
       cbFunc_t    cbFunc,
       void*       cbArg,
       const char* cfgLabel="io" );
@@ -65,6 +65,10 @@ namespace cw
     const char* midiDevicePortName(  handle_t h, unsigned devIdx, bool inputFl, unsigned portIdx );
     unsigned    midiDevicePortIndex( handle_t h, unsigned devIdx, bool inputFl, const char* portName );    
     rc_t        midiDeviceSend(      handle_t h, unsigned devIdx, unsigned portIdx, midi::byte_t status, midi::byte_t d0, midi::byte_t d1 );
+
+    
+
+    
     
   }
 }
diff --git a/cwIoTest.cpp b/cwIoTest.cpp
index bf03280..27d2f31 100644
--- a/cwIoTest.cpp
+++ b/cwIoTest.cpp
@@ -38,6 +38,15 @@ cw::rc_t cw::io::test()
               midi: {
                  parserBufByteN: 1024,
               }
+          
+              audio: [
+                {
+                  name:   "default",
+                  device: "HDA Intel PCH CS4208 Analog",
+                  srate:  48000,
+                  framesPerCycle: 64                  
+                }
+              ]
             }
       })";