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