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/*- * Copyright (c) 2005-2009 Ariff Abdullah <ariff@FreeBSD.org> * Copyright (c) 2001 Cameron Grant <cg@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD: release/9.1.0/sys/dev/sound/pcm/vchan.h 193640 2009-06-07 19:12:08Z ariff $ */ #ifndef _SND_VCHAN_H_ #define _SND_VCHAN_H_ int vchan_create(struct pcm_channel *, int); int vchan_destroy(struct pcm_channel *); #ifdef SND_DEBUG int vchan_passthrough(struct pcm_channel *, const char *); #define vchan_sync(c) vchan_passthrough(c, __func__) #else int vchan_sync(struct pcm_channel *); #endif #define VCHAN_SYNC_REQUIRED(c) \ (((c)->flags & CHN_F_VIRTUAL) && (((c)->flags & CHN_F_DIRTY) || \ sndbuf_getfmt((c)->bufhard) != (c)->parentchannel->format || \ sndbuf_getspd((c)->bufhard) != (c)->parentchannel->speed)) void vchan_initsys(device_t); /* * Default format / rate */ #define VCHAN_DEFAULT_FORMAT SND_FORMAT(AFMT_S16_LE, 2, 0) #define VCHAN_DEFAULT_RATE 48000 #define VCHAN_PLAY 0 #define VCHAN_REC 1 /* * Offset by +/- 1 so we can distinguish bogus pointer. */ #define VCHAN_SYSCTL_DATA(x, y) \ ((void *)((intptr_t)(((((x) + 1) & 0xfff) << 2) | \ (((VCHAN_##y) + 1) & 0x3)))) #define VCHAN_SYSCTL_DATA_SIZE sizeof(void *) #define VCHAN_SYSCTL_UNIT(x) ((int)(((intptr_t)(x) >> 2) & 0xfff) - 1) #define VCHAN_SYSCTL_DIR(x) ((int)((intptr_t)(x) & 0x3) - 1) #endif /* _SND_VCHAN_H_ */