RtAudio #123

test.cc

#include "RtAudio.h"
#include <string.h>
#include <unistd.h>

static int channels = 0;

int audio_callback(
    void *outputBuffer, void *inputBuffer,
    unsigned int nFrames,
    double streamTime,
    RtAudioStreamStatus status,
    void *userData)
{
    memset(outputBuffer, 0, channels * nFrames * sizeof(float));
    return 0;
}

int main(int argc, char *argv[])
{
    int channels = 0;
    if (argc != 2 || (channels = atoi(argv[1])) < 1) {
        fprintf(stderr, "You must pass a channel count argument!\n");
        return 1;
    }
    ::channels = channels;

    RtAudio *audio = new RtAudio(RtAudio::UNIX_JACK);

    RtAudio::StreamParameters inp;
    inp.nChannels = channels;
    inp.deviceId = audio->getDefaultInputDevice();
    RtAudio::StreamParameters outp;
    outp.nChannels = channels;
    outp.deviceId = audio->getDefaultOutputDevice();
    RtAudio::StreamOptions opts;
    opts.flags = RTAUDIO_JACK_DONT_CONNECT;
    opts.streamName = "RtAudio with JACK";

    unsigned rate = audio->getDeviceInfo(inp.deviceId).preferredSampleRate;
    unsigned bs = 1024;

    fprintf(stderr, "Open Stream\n");
    audio->openStream(&outp, &inp, RTAUDIO_FLOAT32, rate, &bs, &audio_callback, nullptr, &opts);

    fprintf(stderr, "Start Stream\n");
    audio->startStream();

    for (;;)
        pause();

    return 0;
}