app/alsa.h

   1 /*
   2  * Lightweight Autonomic Network Architecture
   3  * Copyright 2011 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   4  * Swiss federal institute of technology (ETH Zurich)
   5  * Subject to the GPL.
   6  */
   7
   8 #ifndef ALSA_H
   9 #define ALSA_H
  10
  11 #include <stdlib.h>
  12 #include <sys/poll.h>
  13 #include <alsa/asoundlib.h>
  14
  15 #include "alsa.h"
  16
  17 struct alsa_dev;
  18
  19 extern struct alsa_dev *alsa_open(char *devname, unsigned int rate,
  20                                   int channels, int period);
  21 extern void alsa_close(struct alsa_dev *dev);
  22 extern ssize_t alsa_read(struct alsa_dev *dev, short *pcm, size_t len);
  23 extern ssize_t alsa_write(struct alsa_dev *dev, const short *pcm, size_t len);
  24 extern int alsa_cap_ready(struct alsa_dev *dev, struct pollfd *pfds,
  25                           unsigned int nfds);
  26 extern int alsa_play_ready(struct alsa_dev *dev, struct pollfd *pfds,
  27                            unsigned int nfds);
  28 extern void alsa_start(struct alsa_dev *dev);
  29 extern unsigned int alsa_nfds(struct alsa_dev *dev);
  30 extern void alsa_getfds(struct alsa_dev *dev, struct pollfd *pfds,
  31                         unsigned int nfds);
  32
  33 #endif /* ALSA_H */