added beginnings of portaudio based phone interface for testing

VoMP.

Makefile.in

@@ -5,7 +5,7 @@ SRCS=	dna.c server.c client.c peers.c ciphers.c responses.c packetformats.c data
 	rhizome.c rhizome_http.c rhizome_bundle.c rhizome_database.c rhizome_crypto.c \
 	rhizome_packetformats.c rhizome_fetch.c sqlite3.c encode.c sha2.c randombytes.c \
 	overlay_broadcast.c dna_identity.c commandline.c serval_packetvisualise.c \
-	trans_cache.c keyring.c vomp.c
+	trans_cache.c keyring.c vomp.c pa_phone.c
 
 OBJS=	$(SRCS:.c=.o)
 

pa_phone.c

@@ -0,0 +1,90 @@
+#ifdef WITH_PORTAUDIO
+#include "serval.h"
+#include <portaudio.h>
+
+struct private_data {
+  int foo;
+};
+
+struct private_data pd;
+PaStream *stream=NULL;
+
+/* This routine will be called by the PortAudio engine when audio is needed.
+ It may called at interrupt level on some machines so don't do anything
+ that could mess up the system like calling malloc() or free().
+*/ 
+static int paphoneCallback( const void *inputBuffer, void *outputBuffer,
+                           unsigned long framesPerBuffer,
+                           const PaStreamCallbackTimeInfo* timeInfo,
+                           PaStreamCallbackFlags statusFlags,
+                           void *userData )
+{
+    /* Cast data passed through stream to our structure. */
+    struct private_data *data = (struct private_data*)userData; 
+    uint16_t *out = (uint16_t*)outputBuffer;
+    uint16_t *in = (uint16_t*)inputBuffer;
+    unsigned int i;
+
+    /* Add recorded audio to ring buffer */
+    /* Play audio from ring buffer.
+       XXX - Special case for DTMF tones.
+       DTMF is:
+          1209 1336 1477 1633
+       697  1    2    3    A
+       770  4    5    6    B
+       852  7    8    9    C
+       941  *    0    #    D
+    */
+
+    return 0;
+}
+
+int paphone_setup()
+{
+ PaError err;
+ err = Pa_Initialize();
+ if( err != paNoError ) goto error;  
+
+ 
+ /* Open an audio I/O stream. */
+ err = Pa_OpenDefaultStream( &stream,
+			     1,          /* one input channel */
+			     1,          /* one output channel */
+			     paInt16,  /* sample format */
+			     8000,
+			     8000/40,    /* frames per buffer, i.e. the number
+					    of sample frames that PortAudio will
+					    request from the callback. Many apps
+					    may want to use
+					    paFramesPerBufferUnspecified, which
+					    tells PortAudio to pick the best,
+					    possibly changing, buffer size.*/
+			     paphoneCallback, /* this is your callback function */
+			     &pd ); /*This is a pointer that will be passed to
+					your callback*/
+ if( err != paNoError ) goto error;
+
+ err = Pa_StartStream( stream );
+ if( err != paNoError ) goto error;
+
+  return 0;
+ error:
+  return WHYF(  "PortAudio error: %s\n", Pa_GetErrorText( err ) );
+}
+
+int paphone_cleanup()
+{
+  PaError err;
+ err = Pa_StopStream( stream );
+    if( err != paNoError ) goto error;
+ err = Pa_CloseStream( stream );
+    if( err != paNoError ) goto error;
+
+ error:
+  err = Pa_Terminate();
+  if( err != paNoError )
+    return WHYF(  "PortAudio error: %s\n", Pa_GetErrorText( err ) );
+  return 0;
+}
+
+#endif