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/******************************************/
/*
call_inout.c
by Gary P. Scavone, 2001
Records from default input and passes it
through to the output. Takes number of
channels and sample rate as input arguments.
Uses callback functionality.
*/
/******************************************/
#include "RtAudio.h"
#include <iostream.h>
/*
typedef signed long MY_TYPE;
#define FORMAT RtAudio::RTAUDIO_SINT24
typedef char MY_TYPE;
#define FORMAT RtAudio::RTAUDIO_SINT8
typedef signed short MY_TYPE;
#define FORMAT RtAudio::RTAUDIO_SINT16
typedef signed long MY_TYPE;
#define FORMAT RtAudio::RTAUDIO_SINT32
typedef float MY_TYPE;
#define FORMAT RtAudio::RTAUDIO_FLOAT32
*/
typedef double MY_TYPE;
#define FORMAT RtAudio::RTAUDIO_FLOAT64
void usage(void) {
/* Error function in case of incorrect command-line
argument specifications
*/
cout << "\nuseage: call_inout N fs device\n";
cout << " where N = number of channels,\n";
cout << " fs = the sample rate,\n";
cout << " and device = the device to use (default = 0).\n\n";
exit(0);
}
int inout(char *buffer, int buffer_size, void *)
{
// Surprise!! We do nothing to pass the data through.
return 0;
}
int main(int argc, char *argv[])
{
int stream, chans, fs, device = 0;
RtAudio *audio;
char input;
// minimal command-line checking
if (argc != 3 && argc != 4 ) usage();
chans = (int) atoi(argv[1]);
fs = (int) atoi(argv[2]);
if ( argc == 4 )
device = (int) atoi(argv[3]);
// Open the realtime output device
int buffer_size = 512;
try {
audio = new RtAudio(&stream, device, chans, device, chans,
FORMAT, fs, &buffer_size, 8);
}
catch (RtError &) {
exit(EXIT_FAILURE);
}
try {
audio->setStreamCallback(stream, &inout, NULL);
audio->startStream(stream);
}
catch (RtError &) {
goto cleanup;
}
cout << "\nRunning ... press <enter> to quit (buffer size = " << buffer_size << ").\n";
cin.get(input);
try {
audio->stopStream(stream);
}
catch (RtError &) {
}
cleanup:
audio->closeStream(stream);
delete audio;
return 0;
}
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