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 <cg@freebsd.org>
    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: src/sys/dev/sound/pcm/buffer.h,v 1.10.2.2 2007/05/13 20:50:31 ariff Exp $
   27  * $DragonFly: src/sys/dev/sound/pcm/buffer.h,v 1.5 2008/01/05 13:34:22 corecode Exp $
   28  */
   29 
   30 #define SND_DMA(b) (sndbuf_getflags((b)) & SNDBUF_F_DMA)
   31 #define SNDBUF_LOCKASSERT(b)
   32 
   33 #define SNDBUF_F_DMA            0x00000001
   34 #define SNDBUF_F_XRUN           0x00000002
   35 #define SNDBUF_F_RUNNING        0x00000004
   36 #define SNDBUF_F_MANAGED        0x00000008
   37 
   38 #define SNDBUF_NAMELEN  48
   39 
   40 struct snd_dbuf {
   41         device_t dev;
   42         u_int8_t *buf, *tmpbuf;
   43         unsigned int bufsize, maxsize;
   44         volatile int dl; /* transfer size */
   45         volatile int rp; /* pointers to the ready area */
   46         volatile int rl; /* length of ready area */
   47         volatile int hp;
   48         volatile u_int32_t total, prev_total;
   49         int dmachan, dir;       /* dma channel */
   50         u_int32_t fmt, spd, bps;
   51         unsigned int blksz, blkcnt;
   52         int xrun;
   53         u_int32_t flags;
   54         bus_dmamap_t dmamap;
   55         bus_dma_tag_t dmatag;
   56         bus_addr_t buf_addr;
   57         struct kqinfo kq;
   58         struct task kqtask;
   59         struct pcm_channel *channel;
   60         char name[SNDBUF_NAMELEN];
   61 };
   62 
   63 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel);
   64 void sndbuf_destroy(struct snd_dbuf *b);
   65 
   66 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what);
   67 
   68 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size);
   69 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size);
   70 void sndbuf_free(struct snd_dbuf *b);
   71 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
   72 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
   73 void sndbuf_reset(struct snd_dbuf *b);
   74 void sndbuf_clear(struct snd_dbuf *b, unsigned int length);
   75 void sndbuf_fillsilence(struct snd_dbuf *b);
   76 
   77 u_int32_t sndbuf_getfmt(struct snd_dbuf *b);
   78 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt);
   79 unsigned int sndbuf_getspd(struct snd_dbuf *b);
   80 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd);
   81 unsigned int sndbuf_getbps(struct snd_dbuf *b);
   82 
   83 bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf);
   84 
   85 void *sndbuf_getbuf(struct snd_dbuf *b);
   86 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs);
   87 unsigned int sndbuf_getsize(struct snd_dbuf *b);
   88 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b);
   89 unsigned int sndbuf_getalign(struct snd_dbuf *b);
   90 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b);
   91 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt);
   92 unsigned int sndbuf_getblksz(struct snd_dbuf *b);
   93 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz);
   94 unsigned int sndbuf_runsz(struct snd_dbuf *b);
   95 void sndbuf_setrun(struct snd_dbuf *b, int go);
   96 struct kqinfo *sndbuf_getkq(struct snd_dbuf *b);
   97 
   98 unsigned int sndbuf_getxrun(struct snd_dbuf *b);
   99 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt);
  100 unsigned int sndbuf_gethwptr(struct snd_dbuf *b);
  101 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr);
  102 unsigned int sndbuf_getfree(struct snd_dbuf *b);
  103 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b);
  104 unsigned int sndbuf_getready(struct snd_dbuf *b);
  105 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b);
  106 unsigned int sndbuf_getblocks(struct snd_dbuf *b);
  107 unsigned int sndbuf_getprevblocks(struct snd_dbuf *b);
  108 unsigned int sndbuf_gettotal(struct snd_dbuf *b);
  109 void sndbuf_updateprevtotal(struct snd_dbuf *b);
  110 
  111 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count);
  112 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count);
  113 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count);
  114 
  115 u_int32_t sndbuf_getflags(struct snd_dbuf *b);
  116 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on);
  117 
  118 int sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq);
  119 int sndbuf_dmasetdir(struct snd_dbuf *b, int dir);
  120 void sndbuf_dma(struct snd_dbuf *b, int go);
  121 int sndbuf_dmaptr(struct snd_dbuf *b);
  122 void sndbuf_dmabounce(struct snd_dbuf *b);

Cache object: a9c0ac424c79afcd1ebbec083f103a7d


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