code.delx.au - pulseaudio/blob - polyp/parec-simple.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdio.h>
  27 #include <unistd.h>
  28 #include <string.h>
  29 #include <errno.h>
  30
  31 #include <polyp/polyplib-simple.h>
  32 #include <polyp/polyplib-error.h>
  33
  34 #define BUFSIZE 1024
  35
  36 /* A simple routine calling UNIX write() in a loop */
  37 static ssize_t loop_write(int fd, const void*data, size_t size) {
  38     ssize_t ret = 0;
  39
  40     while (size > 0) {
  41         ssize_t r;
  42
  43         if ((r = write(fd, data, size)) < 0)
  44             return r;
  45
  46         if (r == 0)
  47             break;
  48
  49         ret += r;
  50         data = (uint8_t*) data + r;
  51         size -= r;
  52     }
  53
  54     return ret;
  55 }
  56
  57 int main(int argc, char*argv[]) {
  58     /* The sample type to use */
  59     static const struct pa_sample_spec ss = {
  60         .format = PA_SAMPLE_S16LE,
  61         .rate = 44100,
  62         .channels = 2
  63     };
  64     struct pa_simple *s = NULL;
  65     int ret = 1;
  66     int error;
  67
  68     /* Create the recording stream */
  69     if (!(s = pa_simple_new(NULL, argv[0], PA_STREAM_RECORD, NULL, "record", &ss, NULL, 0, &error))) {
  70         fprintf(stderr, __FILE__": pa_simple_new() failed: %s\n", pa_strerror(error));
  71         goto finish;
  72     }
  73
  74     for (;;) {
  75         uint8_t buf[BUFSIZE];
  76         ssize_t r;
  77
  78         /* Record some data ... */
  79         if (pa_simple_read(s, buf, sizeof(buf), &error) < 0) {
  80             fprintf(stderr, __FILE__": pa_simple_read() failed: %s\n", pa_strerror(error));
  81             goto finish;
  82         }
  83
  84         /* And write it to STDOUT */
  85         if ((r = loop_write(STDOUT_FILENO, buf, sizeof(buf))) <= 0) {
  86             fprintf(stderr, __FILE__": write() failed: %s\n", strerror(errno));
  87             goto finish;
  88         }
  89     }
  90
  91     ret = 0;
  92
  93 finish:
  94
  95     if (s)
  96         pa_simple_free(s);
  97
  98     return ret;
  99 }