#include <alsa/asoundlib.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define BUFFER_SIZE 1024
#define SAMPLE_RATE 11025
#define CHANNELS 1
#define FORMAT SND_PCM_FORMAT_U8

int main() {
    snd_pcm_t *pcm_handle;
    int pipe_fd;
    char *fifo = "/dev/dsp";
    short buffer[BUFFER_SIZE];

    // Create named pipe (FIFO)
    mkfifo(fifo, 0666);

    // Open the ALSA PCM device
    if (snd_pcm_open(&pcm_handle, "default", SND_PCM_STREAM_PLAYBACK, 0) < 0) {
        fprintf(stderr, "Error opening PCM device\n");
        return 1;
    }

    // Set PCM parameters
    snd_pcm_set_params(pcm_handle, FORMAT, SND_PCM_ACCESS_RW_INTERLEAVED, CHANNELS, SAMPLE_RATE, 1, 500000);

    // Open the named pipe for reading
    pipe_fd = open(fifo, O_RDONLY);

    // Read from the pipe and play back the audio
    while (1) {
        ssize_t bytesRead = read(pipe_fd, buffer, sizeof(buffer));

        if (bytesRead == -1) {
            perror("Error reading from pipe");
            break;
        }

        // Write the audio data to the ALSA PCM device
        if (snd_pcm_writei(pcm_handle, buffer, bytesRead / sizeof(short)) < 0) {
            snd_pcm_prepare(pcm_handle);
            fprintf(stderr, "Error playing audio\n");
        }
    }

    // Close the PCM device and named pipe
    snd_pcm_close(pcm_handle);
    close(pipe_fd);
    
    // Remove the named pipe
    unlink(fifo);

    return 0;
}