1 /* 2 Copyright (C) 2004-2006 Jean-Marc Valin 3 Copyright (C) 2006 Commonwealth Scientific and Industrial Research 4 Organisation (CSIRO) Australia 5 6 Redistribution and use in source and binary forms, with or without 7 modification, are permitted provided that the following conditions are 8 met: 9 10 1. Redistributions of source code must retain the above copyright notice, 11 this list of conditions and the following disclaimer. 12 13 2. Redistributions in binary form must reproduce the above copyright 14 notice, this list of conditions and the following disclaimer in the 15 documentation and/or other materials provided with the distribution. 16 17 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 21 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 26 ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 POSSIBILITY OF SUCH DAMAGE. 28 29 */ 30 31 #ifndef ALSA_DEVICE_H 32 #define ALSA_DEVICE_H 33 34 #include <sys/poll.h> 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 struct AlsaDevice_; 41 42 typedef struct AlsaDevice_ AlsaDevice; 43 44 AlsaDevice *alsa_device_open(char *device_name, unsigned int rate, int channels, int period); 45 46 void alsa_device_close(AlsaDevice *dev); 47 48 int alsa_device_read(AlsaDevice *dev, short *pcm, int len); 49 50 int alsa_device_write(AlsaDevice *dev, const short *pcm, int len); 51 52 int alsa_device_capture_ready(AlsaDevice *dev, struct pollfd *pfds, unsigned int nfds); 53 54 int alsa_device_playback_ready(AlsaDevice *dev, struct pollfd *pfds, unsigned int nfds); 55 56 void alsa_device_start(AlsaDevice *dev); 57 58 int alsa_device_nfds(AlsaDevice *dev); 59 60 void alsa_device_getfds(AlsaDevice *dev, struct pollfd *pfds, unsigned int nfds); 61 62 #ifdef __cplusplus 63 } 64 #endif 65 66 #endif 67