src/alsa.h

   1 /*
   2  * transsip - the telephony toolkit
   3  * By Daniel Borkmann <daniel@transsip.org>
   4  * Copyright 2011, 2012 Daniel Borkmann <dborkma@tik.ee.ethz.ch>,
   5  * Swiss federal institute of technology (ETH Zurich)
   6  * Subject to the GPL, version 2.
   7  */
   8
   9 #ifndef ALSA_H
  10 #define ALSA_H
  11
  12 #include <sys/poll.h>
  13
  14 struct alsa_dev;
  15
  16 extern struct alsa_dev *alsa_open(char *devname, unsigned int rate,
  17                                   int channels, int period);
  18 extern void alsa_close(struct alsa_dev *dev);
  19 extern ssize_t alsa_read(struct alsa_dev *dev, short *pcm, size_t len);
  20 extern ssize_t alsa_write(struct alsa_dev *dev, const short *pcm, size_t len);
  21 extern int alsa_cap_ready(struct alsa_dev *dev, struct pollfd *pfds,
  22                           unsigned int nfds);
  23 extern int alsa_play_ready(struct alsa_dev *dev, struct pollfd *pfds,
  24                            unsigned int nfds);
  25 extern void alsa_start(struct alsa_dev *dev);
  26 extern void alsa_stop(struct alsa_dev *dev);
  27 extern unsigned int alsa_nfds(struct alsa_dev *dev);
  28 extern void alsa_getfds(struct alsa_dev *dev, struct pollfd *pfds,
  29                         unsigned int nfds);
  30
  31 #endif /* ALSA_H */