The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/sound/pcm/buffer.h

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    1 /*
    2  * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
    3  * 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
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  * $FreeBSD: stable/4/sys/dev/sound/pcm/buffer.h 95264 2002-04-22 15:49:36Z cg $
   27  */
   28 
   29 #define ISA_DMA(b) (sndbuf_getflags((b)) & SNDBUF_F_ISADMA)
   30 #define SNDBUF_LOCKASSERT(b)
   31 
   32 #define SNDBUF_F_ISADMA         0x00000001
   33 #define SNDBUF_F_XRUN           0x00000002
   34 #define SNDBUF_F_RUNNING        0x00000004
   35 
   36 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc);
   37 void sndbuf_destroy(struct snd_dbuf *b);
   38 
   39 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what);
   40 
   41 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size);
   42 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size);
   43 void sndbuf_free(struct snd_dbuf *b);
   44 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
   45 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
   46 void sndbuf_reset(struct snd_dbuf *b);
   47 void sndbuf_clear(struct snd_dbuf *b, unsigned int length);
   48 void sndbuf_fillsilence(struct snd_dbuf *b);
   49 
   50 u_int32_t sndbuf_getfmt(struct snd_dbuf *b);
   51 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt);
   52 unsigned int sndbuf_getspd(struct snd_dbuf *b);
   53 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd);
   54 unsigned int sndbuf_getbps(struct snd_dbuf *b);
   55 
   56 void *sndbuf_getbuf(struct snd_dbuf *b);
   57 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs);
   58 unsigned int sndbuf_getsize(struct snd_dbuf *b);
   59 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b);
   60 unsigned int sndbuf_getalign(struct snd_dbuf *b);
   61 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b);
   62 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt);
   63 unsigned int sndbuf_getblksz(struct snd_dbuf *b);
   64 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz);
   65 unsigned int sndbuf_runsz(struct snd_dbuf *b);
   66 void sndbuf_setrun(struct snd_dbuf *b, int go);
   67 struct selinfo *sndbuf_getsel(struct snd_dbuf *b);
   68 
   69 unsigned int sndbuf_getxrun(struct snd_dbuf *b);
   70 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt);
   71 unsigned int sndbuf_gethwptr(struct snd_dbuf *b);
   72 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr);
   73 unsigned int sndbuf_getfree(struct snd_dbuf *b);
   74 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b);
   75 unsigned int sndbuf_getready(struct snd_dbuf *b);
   76 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b);
   77 unsigned int sndbuf_getblocks(struct snd_dbuf *b);
   78 unsigned int sndbuf_getprevblocks(struct snd_dbuf *b);
   79 unsigned int sndbuf_gettotal(struct snd_dbuf *b);
   80 void sndbuf_updateprevtotal(struct snd_dbuf *b);
   81 
   82 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count);
   83 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count);
   84 int sndbuf_uiomove(struct snd_dbuf *b, struct uio *uio, unsigned int count);
   85 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count);
   86 
   87 u_int32_t sndbuf_getflags(struct snd_dbuf *b);
   88 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on);
   89 
   90 int sndbuf_isadmasetup(struct snd_dbuf *b, struct resource *drq);
   91 int sndbuf_isadmasetdir(struct snd_dbuf *b, int dir);
   92 void sndbuf_isadma(struct snd_dbuf *b, int go);
   93 int sndbuf_isadmaptr(struct snd_dbuf *b);
   94 void sndbuf_isadmabounce(struct snd_dbuf *b);
   95 
   96 

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