1 /* pcm_io.h 2 ** Copyright (c) 2019, The Linux Foundation. 3 ** 4 ** Redistribution and use in source and binary forms, with or without 5 ** modification, are permitted provided that the following conditions are 6 ** met: 7 ** * Redistributions of source code must retain the above copyright 8 ** notice, this list of conditions and the following disclaimer. 9 ** * Redistributions in binary form must reproduce the above 10 ** copyright notice, this list of conditions and the following 11 ** disclaimer in the documentation and/or other materials provided 12 ** with the distribution. 13 ** * Neither the name of The Linux Foundation nor the names of its 14 ** contributors may be used to endorse or promote products derived 15 ** from this software without specific prior written permission. 16 ** 17 ** THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 18 ** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 20 ** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 21 ** BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 ** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 ** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 ** BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 26 ** OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 ** IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 **/ 29 30 #ifndef TINYALSA_SRC_PCM_IO_H 31 #define TINYALSA_SRC_PCM_IO_H 32 33 #include <poll.h> 34 #include <sound/asound.h> 35 36 struct snd_node; 37 38 struct pcm_ops { 39 int (*open) (unsigned int card, unsigned int device, 40 unsigned int flags, void **data, struct snd_node *node); 41 void (*close) (void *data); 42 int (*ioctl) (void *data, unsigned int cmd, ...); 43 void *(*mmap) (void *data, void *addr, size_t length, int prot, int flags, 44 off_t offset); 45 int (*munmap) (void *data, void *addr, size_t length); 46 int (*poll) (void *data, struct pollfd *pfd, nfds_t nfds, int timeout); 47 }; 48 49 extern const struct pcm_ops hw_ops; 50 extern const struct pcm_ops plug_ops; 51 52 #endif /* TINYALSA_SRC_PCM_IO_H */ 53