1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> 5 * Copyright (c) 2001 Cameron Grant <cg@FreeBSD.org> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 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 AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef _SND_VCHAN_H_ 31 #define _SND_VCHAN_H_ 32 33 int vchan_create(struct pcm_channel *, int); 34 int vchan_destroy(struct pcm_channel *); 35 36 #ifdef SND_DEBUG 37 int vchan_passthrough(struct pcm_channel *, const char *); 38 #define vchan_sync(c) vchan_passthrough(c, __func__) 39 #else 40 int vchan_sync(struct pcm_channel *); 41 #endif 42 43 #define VCHAN_SYNC_REQUIRED(c) \ 44 (((c)->flags & CHN_F_VIRTUAL) && (((c)->flags & CHN_F_DIRTY) || \ 45 sndbuf_getfmt((c)->bufhard) != (c)->parentchannel->format || \ 46 sndbuf_getspd((c)->bufhard) != (c)->parentchannel->speed)) 47 48 void vchan_initsys(device_t); 49 50 /* 51 * Default format / rate 52 */ 53 #define VCHAN_DEFAULT_FORMAT SND_FORMAT(AFMT_S16_LE, 2, 0) 54 #define VCHAN_DEFAULT_RATE 48000 55 56 #define VCHAN_PLAY 0 57 #define VCHAN_REC 1 58 59 /* 60 * Offset by +/- 1 so we can distinguish bogus pointer. 61 */ 62 #define VCHAN_SYSCTL_DATA(x, y) \ 63 ((void *)((intptr_t)(((((x) + 1) & 0xfff) << 2) | \ 64 (((VCHAN_##y) + 1) & 0x3)))) 65 66 #define VCHAN_SYSCTL_DATA_SIZE sizeof(void *) 67 #define VCHAN_SYSCTL_UNIT(x) ((int)(((intptr_t)(x) >> 2) & 0xfff) - 1) 68 #define VCHAN_SYSCTL_DIR(x) ((int)((intptr_t)(x) & 0x3) - 1) 69 70 #endif /* _SND_VCHAN_H_ */ 71