/*
 * audprobe.c - probe the AIX audio device
 * Claude Opus 4.5, 2026-10-13
 */

#include <sys/param.h>
#undef BIG_ENDIAN
#include <sys/audio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/ioctl.h>

int main(int argc, char **argv)
{
    int fd;
    audio_init init;
    audio_status status;
    int flags = O_RDWR;
    char *dev = "/dev/paud0";

    if (argc > 1) dev = argv[1];
    if (argc > 2) {
        if (strcmp(argv[2], "r") == 0) flags = O_RDONLY;
        else if (strcmp(argv[2], "w") == 0) flags = O_WRONLY;
        else if (strcmp(argv[2], "rw") == 0) flags = O_RDWR;
    }

    printf("opening %s with flags 0x%x\n", dev, flags);
    fd = open(dev, flags);
    if (fd < 0) {
        printf("open failed: errno=%d (%s)\n", errno, strerror(errno));
        return 1;
    }
    printf("open succeeded, fd=%d\n", fd);

    /* try AUDIO_STATUS first - should work even without INIT */
    memset(&status, 0, sizeof(status));
    if (ioctl(fd, AUDIO_STATUS, &status) < 0) {
        printf("AUDIO_STATUS failed: errno=%d (%s)\n", errno, strerror(errno));
    } else {
        printf("AUDIO_STATUS ok:\n");
        printf("  srate=%ld bits=%ld mode=%d channels=%d\n",
               status.srate, status.bits_per_sample, status.mode, status.channels);
        printf("  flags=0x%lx operation=0x%lx\n", status.flags, status.operation);
    }

    /* try AUDIO_INIT to query capabilities */
    memset(&init, 0, sizeof(init));
    init.srate = 22050;
    init.bits_per_sample = 16;
    init.mode = PCM;
    init.channels = 1;
    init.flags = SIGNED | TWOS_COMPLEMENT | BIG_ENDIAN | FIXED;
    init.operation = PLAY;

    printf("\nattempting AUDIO_INIT: srate=%ld bits=%ld mode=%d channels=%d flags=0x%lx op=%ld\n",
           init.srate, init.bits_per_sample, init.mode, init.channels, init.flags, init.operation);

    if (ioctl(fd, AUDIO_INIT, &init) < 0) {
        printf("AUDIO_INIT failed: errno=%d (%s)\n", errno, strerror(errno));
    } else {
        printf("AUDIO_INIT returned:\n");
        printf("  rc=%d srate=%ld bits=%ld bsize=%ld\n",
               init.rc, init.srate, init.bits_per_sample, init.bsize);
        printf("  flags=0x%lx slot=%d device_id=%d\n",
               init.flags, init.slot_number, init.device_id);
    }

    close(fd);
    return 0;
}