twostreams.cpp
by Gary P. Scavone, 2001
- Text executable for audio playback,
+ Test executable for audio playback,
recording, duplex operation, stopping,
starting, and aborting operations.
Takes number of channels and sample
typedef signed long MY_TYPE;
#define FORMAT RtAudio::RTAUDIO_SINT32
#define SCALE 2147483647.0
+*/
typedef float MY_TYPE;
#define FORMAT RtAudio::RTAUDIO_FLOAT32
#define SCALE 1.0
-*/
+/*
typedef double MY_TYPE;
#define FORMAT RtAudio::RTAUDIO_FLOAT64
#define SCALE 1.0
+*/
#define BASE_RATE 0.005
#define TIME 2.0
/* Error function in case of incorrect command-line
argument specifications
*/
- cout << "\nuseage: twostreams N fs\n";
+ cout << "\nuseage: twostreams N fs <device>\n";
cout << " where N = number of channels,\n";
- cout << " and fs = the sample rate.\n\n";
+ cout << " fs = the sample rate,\n";
+ cout << " and device = the device to use (default = 0).\n\n";
exit(0);
}
int main(int argc, char *argv[])
{
- int chans, fs, device, buffer_size, stream1, stream2;
+ int chans, fs, buffer_size, stream1 = 0, stream2 = 0, device = 0;
long frames, counter = 0, i, j;
MY_TYPE *buffer1, *buffer2;
RtAudio *audio;
FILE *fd;
- double *data;
+ double *data = 0;
// minimal command-line checking
- if (argc != 3) usage();
+ 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
buffer_size = 512;
- device = 0; // default device
try {
audio = new RtAudio();
}
FORMAT, fs, &buffer_size, 8);
stream2 = audio->openStream(0, 0, device, chans,
FORMAT, fs, &buffer_size, 8);
+ }
+ catch (RtError &) {
+ goto cleanup;
+ }
+
+ try {
buffer1 = (MY_TYPE *) audio->getStreamBuffer(stream1);
buffer2 = (MY_TYPE *) audio->getStreamBuffer(stream2);
}
cout << "\nStopping playback stream." << endl;
try {
audio->stopStream(stream1);
- audio->startStream(stream2);
}
catch (RtError &) {
goto cleanup;
fd = fopen("test.raw","wb");
+ try {
+ audio->startStream(stream2);
+ }
+ catch (RtError &) {
+ goto cleanup;
+ }
+
counter = 0;
cout << "\nStarting recording stream for " << TIME << " seconds." << endl;
while (counter < frames) {