sys/dev/sound/pcm/buffer.h

   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: head/sys/dev/sound/pcm/buffer.h 230845 2012-01-31 21:46:28Z mav $
  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         u_int8_t *shadbuf; /**< shadow buffer used w/ S_D_SILENCE/SKIP */
  43         volatile int sl; /**< shadbuf ready length in # of bytes */
  44         unsigned int bufsize, maxsize, allocsize;
  45         volatile int dl; /* transfer size */
  46         volatile int rp; /* pointers to the ready area */
  47         volatile int rl; /* length of ready area */
  48         volatile int hp;
  49         volatile u_int64_t total, prev_total;
  50         int dmachan, dir;       /* dma channel */
  51         u_int32_t fmt, spd, bps, align;
  52         unsigned int blksz, blkcnt;
  53         int xrun;
  54         u_int32_t flags;
  55         bus_dmamap_t dmamap;
  56         bus_dma_tag_t dmatag;
  57         bus_addr_t buf_addr;
  58         int dmaflags;
  59         struct kqinfo kq;
  60         struct pcm_channel *channel;
  61         char name[SNDBUF_NAMELEN];
  62 };
  63
  64 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel);
  65 void sndbuf_destroy(struct snd_dbuf *b);
  66
  67 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what);
  68
  69 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, int dmaflags, unsigned int size);
  70 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size);
  71 void sndbuf_free(struct snd_dbuf *b);
  72 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
  73 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
  74 void sndbuf_reset(struct snd_dbuf *b);
  75 void sndbuf_clear(struct snd_dbuf *b, unsigned int length);
  76 void sndbuf_fillsilence(struct snd_dbuf *b);
  77 void sndbuf_fillsilence_rl(struct snd_dbuf *b, u_int rl);
  78 void sndbuf_softreset(struct snd_dbuf *b);
  79 void sndbuf_clearshadow(struct snd_dbuf *b);
  80
  81 u_int32_t sndbuf_getfmt(struct snd_dbuf *b);
  82 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt);
  83 unsigned int sndbuf_getspd(struct snd_dbuf *b);
  84 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd);
  85 unsigned int sndbuf_getbps(struct snd_dbuf *b);
  86
  87 bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf);
  88
  89 void *sndbuf_getbuf(struct snd_dbuf *b);
  90 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs);
  91 unsigned int sndbuf_getsize(struct snd_dbuf *b);
  92 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b);
  93 unsigned int sndbuf_getallocsize(struct snd_dbuf *b);
  94 unsigned int sndbuf_getalign(struct snd_dbuf *b);
  95 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b);
  96 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt);
  97 unsigned int sndbuf_getblksz(struct snd_dbuf *b);
  98 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz);
  99 unsigned int sndbuf_runsz(struct snd_dbuf *b);
 100 void sndbuf_setrun(struct snd_dbuf *b, int go);
 101 struct kqinfo *sndbuf_getkq(struct snd_dbuf *b);
 102
 103 unsigned int sndbuf_getxrun(struct snd_dbuf *b);
 104 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int xrun);
 105 unsigned int sndbuf_gethwptr(struct snd_dbuf *b);
 106 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr);
 107 unsigned int sndbuf_getfree(struct snd_dbuf *b);
 108 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b);
 109 unsigned int sndbuf_getready(struct snd_dbuf *b);
 110 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b);
 111 u_int64_t sndbuf_getblocks(struct snd_dbuf *b);
 112 u_int64_t sndbuf_getprevblocks(struct snd_dbuf *b);
 113 u_int64_t sndbuf_gettotal(struct snd_dbuf *b);
 114 u_int64_t sndbuf_getprevtotal(struct snd_dbuf *b);
 115 unsigned int sndbuf_xbytes(unsigned int v, struct snd_dbuf *from, struct snd_dbuf *to);
 116 u_int8_t sndbuf_zerodata(u_int32_t fmt);
 117 void sndbuf_updateprevtotal(struct snd_dbuf *b);
 118
 119 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count);
 120 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count);
 121 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count);
 122
 123 u_int32_t sndbuf_getflags(struct snd_dbuf *b);
 124 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on);
 125
 126 int sndbuf_dmasetup(struct snd_dbuf *b, struct resource *drq);
 127 int sndbuf_dmasetdir(struct snd_dbuf *b, int dir);
 128 void sndbuf_dma(struct snd_dbuf *b, int go);
 129 int sndbuf_dmaptr(struct snd_dbuf *b);
 130 void sndbuf_dmabounce(struct snd_dbuf *b);
 131
 132 #ifdef OSSV4_EXPERIMENT
 133 void sndbuf_getpeaks(struct snd_dbuf *b, int *lp, int *rp);
 134 #endif
 135
 136 static inline u_int32_t
 137 snd_xbytes(u_int32_t v, u_int32_t from, u_int32_t to)
 138 {
 139
 140         if (from == to)
 141                 return (v);
 142         if (from == 0)
 143                 return (0);
 144         return ((u_int64_t)v * to / from);
 145 }