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

Cache object: 3c674a6ae73e4ff2c80454392c80f0c9


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