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: releng/6.3/sys/dev/sound/pcm/buffer.h 169534 2007-05-13 20:50:31Z ariff $
   27  */
   28 
   29 #define SND_DMA(b) (sndbuf_getflags((b)) & SNDBUF_F_DMA)
   30 #define SNDBUF_LOCKASSERT(b)
   31 
   32 #define SNDBUF_F_DMA            0x00000001
   33 #define SNDBUF_F_XRUN           0x00000002
   34 #define SNDBUF_F_RUNNING        0x00000004
   35 #define SNDBUF_F_MANAGED        0x00000008
   36 
   37 #define SNDBUF_NAMELEN  48
   38 
   39 struct snd_dbuf {
   40         device_t dev;
   41         u_int8_t *buf, *tmpbuf;
   42         unsigned int bufsize, maxsize;
   43         volatile int dl; /* transfer size */
   44         volatile int rp; /* pointers to the ready area */
   45         volatile int rl; /* length of ready area */
   46         volatile int hp;
   47         volatile u_int32_t total, prev_total;
   48         int dmachan, dir;       /* dma channel */
   49         u_int32_t fmt, spd, bps;
   50         unsigned int blksz, blkcnt;
   51         int xrun;
   52         u_int32_t flags;
   53         bus_dmamap_t dmamap;
   54         bus_dma_tag_t dmatag;
   55         bus_addr_t buf_addr;
   56         struct selinfo sel;
   57         struct pcm_channel *channel;
   58         char name[SNDBUF_NAMELEN];
   59 };
   60 
   61 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel);
   62 void sndbuf_destroy(struct snd_dbuf *b);
   63 
   64 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what);
   65 
   66 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, unsigned int size);
   67 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size);
   68 void sndbuf_free(struct snd_dbuf *b);
   69 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
   70 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
   71 void sndbuf_reset(struct snd_dbuf *b);
   72 void sndbuf_clear(struct snd_dbuf *b, unsigned int length);
   73 void sndbuf_fillsilence(struct snd_dbuf *b);
   74 
   75 u_int32_t sndbuf_getfmt(struct snd_dbuf *b);
   76 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt);
   77 unsigned int sndbuf_getspd(struct snd_dbuf *b);
   78 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd);
   79 unsigned int sndbuf_getbps(struct snd_dbuf *b);
   80 
   81 bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf);
   82 
   83 void *sndbuf_getbuf(struct snd_dbuf *b);
   84 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs);
   85 unsigned int sndbuf_getsize(struct snd_dbuf *b);
   86 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b);
   87 unsigned int sndbuf_getalign(struct snd_dbuf *b);
   88 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b);
   89 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt);
   90 unsigned int sndbuf_getblksz(struct snd_dbuf *b);
   91 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz);
   92 unsigned int sndbuf_runsz(struct snd_dbuf *b);
   93 void sndbuf_setrun(struct snd_dbuf *b, int go);
   94 struct selinfo *sndbuf_getsel(struct snd_dbuf *b);
   95 
   96 unsigned int sndbuf_getxrun(struct snd_dbuf *b);
   97 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int cnt);
   98 unsigned int sndbuf_gethwptr(struct snd_dbuf *b);
   99 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr);
  100 unsigned int sndbuf_getfree(struct snd_dbuf *b);
  101 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b);
  102 unsigned int sndbuf_getready(struct snd_dbuf *b);
  103 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b);
  104 unsigned int sndbuf_getblocks(struct snd_dbuf *b);
  105 unsigned int sndbuf_getprevblocks(struct snd_dbuf *b);
  106 unsigned int sndbuf_gettotal(struct snd_dbuf *b);
  107 void sndbuf_updateprevtotal(struct snd_dbuf *b);
  108 
  109 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count);
  110 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count);
  111 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count);
  112 
  113 u_int32_t sndbuf_getflags(struct snd_dbuf *b);
  114 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on);
  115 
  116 int sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq);
  117 int sndbuf_dmasetdir(struct snd_dbuf *b, int dir);
  118 void sndbuf_dma(struct snd_dbuf *b, int go);
  119 int sndbuf_dmaptr(struct snd_dbuf *b);
  120 void sndbuf_dmabounce(struct snd_dbuf *b);

Cache object: 129be46854964cc2cd411208f930d341


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