sample_rec.c

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>

#include <pulse/simple.h>
#include <pulse/error.h>
#include <pulse/gccmacro.h>

#define BUFSIZE 1024

/* A simple routine calling UNIX write() in a loop */
static ssize_t loop_write(int fd, const void*data, size_t size) {
    ssize_t ret = 0;
   // printf("start %d\n",(int)size);

    while (size > 0) {
        ssize_t r;

        if ((r = write(fd, data, size)) < 0)
           return r;

        if (r == 0)
            break;

        ret += r;
        data = (const uint8_t*) data + r;
        size -= (size_t) r;
       // close(fd);
     //   printf("end\n");

    }

    return ret;

}

int main(int argc, char*argv[]) {
    /* The sample type to use */
    static const pa_sample_spec ss = {
        .format = PA_SAMPLE_S16LE,
        .rate = 44100,
        .channels = 2

    };
    pa_simple *s = NULL;
    int fd,ret = 1;
    //int fd = open(argv[1],O_CREAT | O_APPEND | O_RDWR);
    if ((fd = open(argv[1], O_CREAT | O_WRONLY | O_APPEND | O_TRUNC)) < 0) {
        fprintf(stderr, __FILE__": open() failed: %s\n", strerror(errno));
        goto finish;

    }
    int error;

    /* Create the recording stream */
    if (!(s = pa_simple_new(NULL, argv[0], PA_STREAM_RECORD, NULL, "record", &ss, NULL, NULL, &error))) {
        fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
        goto finish;

    }

    for (;;) {
        uint8_t buf[BUFSIZE];

        /* Record some data ... */
        if (pa_simple_read(s, buf, sizeof(buf), &error) < 0) {
            fprintf(stderr, __FILE__": pa_simple_read() failed: %s\n", pa_strerror(error));
            goto finish;

        }

        /* And write it to STDOUT */
        if (loop_write(fd, buf, sizeof(buf)) != sizeof(buf)) {
            fprintf(stderr, __FILE__": write() failed: %s\n", strerror(errno));
            goto finish;

        }

    }

    ret = 0;
    close(fd);

finish:

    if (s)
        pa_simple_free(s);

    return ret;

}