2 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #define SND_DMA(b) (sndbuf_getflags((b)) & SNDBUF_F_DMA)
30 #define SNDBUF_LOCKASSERT(b)
32 #define SNDBUF_F_DMA 0x00000001
33 #define SNDBUF_F_XRUN 0x00000002
34 #define SNDBUF_F_RUNNING 0x00000004
36 #define SNDBUF_NAMELEN 48
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 */
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;
56 struct pcm_channel *channel;
57 char name[SNDBUF_NAMELEN];
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);
63 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what);
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);
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);
80 bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf);
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);
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);
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);
112 u_int32_t sndbuf_getflags(struct snd_dbuf *b);
113 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on);
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);