refactor: more example tweaking and rename all to have 'jacket_' prefix

Signed-off-by: Christopher Arndt <chris@chrisarndt.de>

examples/jacket_info.nim

@@ -12,8 +12,8 @@ proc errorCb(msg: cstring) {.cdecl.} =
 
 addHandler(log)
 setErrorFunction(errorCb)
-jclient = clientOpen("test_jacket", NullOption.ord, status.addr)
-debug "Server status: " & $status
+jclient = clientOpen("jacket_info", NullOption.ord, status.addr)
+debug "JACK server status: " & $status
 
 if jclient == nil:
     error getJackStatusErrorString(status)

examples/jacket_port_connect_cb.nim

@@ -4,22 +4,28 @@ import signal
 
 var jclient: ClientTPtr
 var status: cint
+var exitSignalled: bool = false
 var log = newConsoleLogger(when defined(release): lvlInfo else: lvlDebug)
 
+proc cleanup(sig: cint = 0) =
+    debug "Cleaning up..."
+    if jclient != nil:
+        discard jclient.deactivate()
+        discard jclient.clientClose()
+        jclient = nil
+
 proc errorCb(msg: cstring) {.cdecl.} =
     # Suppress verbose JACK error messages when server is not available by
     # default. Pass ``lvlAll`` when creating the logger to enable them.
     debug "JACK error: " & $msg
 
-proc cleanup(sig: cint = 0) {.noconv.} =
-    debug "Cleaning up..."
+proc signalCb(sig: cint) {.noconv.} =
+    info "Received signal: " & $sig
+    exitSignalled = true
 
-    if jclient != nil:
-        discard jclient.deactivate()
-        discard jclient.clientClose()
-        jclient = nil
-
-    quit QuitSuccess
+proc shutdownCb(arg: pointer = nil) {.cdecl.} =
+    info "JACK server has shut down."
+    exitSignalled = true
 
 proc portConnected(portA: PortIdT; portB: PortIdT; connect: cint; arg: pointer) {.cdecl.} =
     let portAPtr = jclient.portById(portA)
@@ -40,26 +46,28 @@ proc portConnected(portA: PortIdT; portB: PortIdT; connect: cint; arg: pointer)
 
 addHandler(log)
 setErrorFunction(errorCb)
-jclient = clientOpen("jacket_port_register", NoStartServer.ord, status.addr)
-debug "Server status: " & $status
+jclient = clientOpen("jacket_port_connect_cb", NoStartServer.ord, status.addr)
+debug "JACK server status: " & $status
 
 if jclient == nil:
     error getJackStatusErrorString(status)
-    quit 1
+    quit QuitFailure
 
 when defined(windows):
-    setSignalProc(cleanup, SIGABRT, SIGINT, SIGTERM)
+    setSignalProc(signalCb, SIGABRT, SIGINT, SIGTERM)
 else:
-    setSignalProc(cleanup, SIGABRT, SIGHUP, SIGINT, SIGQUIT, SIGTERM)
+    setSignalProc(signalCb, SIGABRT, SIGHUP, SIGINT, SIGQUIT, SIGTERM)
 
 discard jclient.portRegister("in_1", JACK_DEFAULT_AUDIO_TYPE, PortIsInput.ord, 0)
 discard jclient.portRegister("out_1", JACK_DEFAULT_AUDIO_TYPE, PortIsOutput.ord, 0)
 
 if jclient.setPortConnectCallback(portConnected, nil) != 0:
-    error "Error: could not set port connection callback."
+    error "Error: could not set JACK port connection callback."
+
+jclient.onShutdown(shutdownCb, nil)
 
 if jclient.activate() == 0:
-    while true:
+    while not exitSignalled:
         sleep(50)
 
-cleanup() # normally not reached
+cleanup()

examples/jacket_port_register.nim

@@ -4,40 +4,48 @@ import jacket
 
 var jclient: ClientTPtr
 var status: cint
+var exitSignalled: bool = false
 var log = newConsoleLogger(when defined(release): lvlInfo else: lvlDebug)
 
+proc cleanup(sig: cint = 0) =
+    debug "Cleaning up..."
+    if jclient != nil:
+        discard jclient.clientClose()
+        jclient = nil
+
 proc errorCb(msg: cstring) {.cdecl.} =
     # Suppress verbose JACK error messages when server is not available by
     # default. Pass ``lvlAll`` when creating the logger to enable them.
     debug "JACK error: " & $msg
 
-proc cleanup(sig: cint = 0) {.noconv.} =
-    debug "Cleaning up..."
-    
-    if jclient != nil:
-        discard jclient.clientClose
-        jclient = nil
+proc signalCb(sig: cint) {.noconv.} =
+    info "Received signal: " & $sig
+    exitSignalled = true
 
-    quit QuitSuccess
+proc shutdownCb(arg: pointer = nil) {.cdecl.} =
+    info "JACK server has shut down."
+    exitSignalled = true
 
 addHandler(log)
 setErrorFunction(errorCb)
 jclient = clientOpen("jacket_port_register", NoStartServer.ord or UseExactName.ord, status.addr)
-debug "Server status: " & $status
+debug "JACK server status: " & $status
 
 if jclient == nil:
     error getJackStatusErrorString(status)
     quit 1
 
 when defined(windows):
-    setSignalProc(cleanup, SIGABRT, SIGINT, SIGTERM)
+    setSignalProc(signalCb, SIGABRT, SIGINT, SIGTERM)
 else:
-    setSignalProc(cleanup, SIGABRT, SIGHUP, SIGINT, SIGQUIT, SIGTERM)
+    setSignalProc(signalCb, SIGABRT, SIGHUP, SIGINT, SIGQUIT, SIGTERM)
 
 discard jclient.portRegister("in_1", JACK_DEFAULT_AUDIO_TYPE, PortIsInput.ord, 0)
 discard jclient.portRegister("out_1", JACK_DEFAULT_AUDIO_TYPE, PortIsOutput.ord, 0)
 
-while true:
+jclient.onShutdown(shutdownCb, nil)
+
+while not exitSignalled:
     sleep(50)
 
-cleanup() # normally not reached
+cleanup()

examples/jacket_sine.nim

@@ -5,6 +5,7 @@ import jacket
 var jclient: ClientTPtr
 var outPort: PortTPtr
 var status: cint
+var exitSignalled: bool = false
 var log = newConsoleLogger(when defined(release): lvlInfo else: lvlDebug)
 
 type
@@ -40,24 +41,25 @@ proc tick(osc: SineOscPtr): float =
     if osc.phase >= tableSize:
         osc.phase -= tableSize
 
-proc errorCb(msg: cstring) {.cdecl.} =
-    # Suppress verbose JACK error messages when server is not available by
-    # default. Pass ``lvlAll`` when creating the logger to enable them.
-    debug "JACK error: " & $msg
-
-proc cleanup(sig: cint = 0) {.noconv.} =
+proc cleanup() =
     debug "Cleaning up..."
-    
     if jclient != nil:
         discard jclient.deactivate()
         discard jclient.clientClose()
         jclient = nil
 
-    quit QuitSuccess
+proc errorCb(msg: cstring) {.cdecl.} =
+    # Suppress verbose JACK error messages when server is not available by
+    # default. Pass ``lvlAll`` when creating the logger to enable them.
+    debug "JACK error: " & $msg
+
+proc signalCb(sig: cint) {.noconv.} =
+    info "Received signal: " & $sig
+    exitSignalled = true
 
 proc shutdownCb(arg: pointer = nil) {.cdecl.} =
-    debug "JACK server has shut down"
-    cleanup()
+    info "JACK server has shut down."
+    exitSignalled = true
 
 proc processCb(nFrames: NFramesT, arg: pointer): cint {.cdecl.} = 
     var outbuf = cast[JackBufferPtr](portGetBuffer(outPort, nFrames))
@@ -86,9 +88,9 @@ var osc = initSineOsc(sampleRate, sineFreq)
 
 # Set up signal handlers to clean up on exit
 when defined(windows):
-    setSignalProc(cleanup, SIGABRT, SIGINT, SIGTERM)
+    setSignalProc(signalCb, SIGABRT, SIGINT, SIGTERM)
 else:
-    setSignalProc(cleanup, SIGABRT, SIGHUP, SIGINT, SIGQUIT, SIGTERM)
+    setSignalProc(signalCb, SIGABRT, SIGHUP, SIGINT, SIGQUIT, SIGTERM)
 
 # Register JACK callbacks
 if jclient.setProcessCallback(processCb, osc.addr) != 0:
@@ -103,7 +105,7 @@ outPort = jclient.portRegister("out_1", JACK_DEFAULT_AUDIO_TYPE, PortIsOutput.or
 # Activate JACK client ...
 if jclient.activate() == 0:
     # ... and keep running until a signal is received
-    while true:
+    while not exitSignalled:
         sleep(50)
 
-cleanup() # normally not reached
+cleanup()