RtAudio example using API names

example.c

#include <rtaudio_c.h>
#include <getopt.h>
#include <stdio.h>

static void print_compiled_apis()
{
    const rtaudio_api_t *apis = rtaudio_compiled_api();
    while (*apis != RTAUDIO_API_UNSPECIFIED) {
        printf(" * %s\n", rtaudio_compiled_api_name(*apis));
        ++apis;
    }
}

int main(int argc, char *argv[])
{
    rtaudio_api_t api = RTAUDIO_API_UNSPECIFIED;
    const char *desired_api = NULL;

    printf("usage: example [-d api] [-h]\n\n");

    int arg;
    while ((arg = getopt(argc, argv, "d:h")) != -1) {
        if (arg == 'd') {
            desired_api = optarg;
            api = rtaudio_compiled_api_by_name(desired_api);
        }
        else if (arg == 'h') {
            print_compiled_apis();
            return 0;
        }
    }

    if (desired_api && api == RTAUDIO_API_UNSPECIFIED) {
        printf("API unavailable '%s'.\n", desired_api);
        print_compiled_apis();
        return 1;
    }

    rtaudio_t audiosys = rtaudio_create(api);
    api = rtaudio_current_api(audiosys);
    printf("Audio is open with API '%s'.\n", rtaudio_compiled_api_name(api));
    /* ... */
    return 0;
}