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  * Subject to the GPL, version 2.
   6  */
   7
   8 #ifndef ALSA_H
   9 #define ALSA_H
  10
  11 #include <sys/poll.h>
  12
  13 struct alsa_dev;
  14
  15 extern struct alsa_dev *alsa_open(char *devname, unsigned int rate,
  16                                   int channels, int period);
  17 extern void alsa_close(struct alsa_dev *dev);
  18 extern ssize_t alsa_read(struct alsa_dev *dev, short *pcm, size_t len);
  19 extern ssize_t alsa_write(struct alsa_dev *dev, const short *pcm, size_t len);
  20 extern int alsa_cap_ready(struct alsa_dev *dev, struct pollfd *pfds,
  21                           unsigned int nfds);
  22 extern int alsa_play_ready(struct alsa_dev *dev, struct pollfd *pfds,
  23                            unsigned int nfds);
  24 extern void alsa_start(struct alsa_dev *dev);
  25 extern void alsa_stop(struct alsa_dev *dev);
  26 extern unsigned int alsa_nfds(struct alsa_dev *dev);
  27 extern void alsa_getfds(struct alsa_dev *dev, struct pollfd *pfds,
  28                         unsigned int nfds);
  29
  30 #endif /* ALSA_H */