1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #define SNDBUF_LOCKASSERT(b)
32
33 #define SNDBUF_F_MANAGED 0x00000008
34
35 #define SNDBUF_NAMELEN 48
36
37 struct snd_dbuf {
38 device_t dev;
39 u_int8_t *buf, *tmpbuf;
40 u_int8_t *shadbuf; /**< shadow buffer used w/ S_D_SILENCE/SKIP */
41 volatile int sl; /**< shadbuf ready length in # of bytes */
42 unsigned int bufsize, maxsize, allocsize;
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_int64_t total, prev_total;
48 int dmachan, dir; /* dma channel */
49 u_int32_t fmt, spd, bps, align;
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 int dmaflags;
57 struct selinfo sel;
58 struct pcm_channel *channel;
59 char name[SNDBUF_NAMELEN];
60 };
61
62 struct snd_dbuf *sndbuf_create(device_t dev, char *drv, char *desc, struct pcm_channel *channel);
63 void sndbuf_destroy(struct snd_dbuf *b);
64
65 void sndbuf_dump(struct snd_dbuf *b, char *s, u_int32_t what);
66
67 int sndbuf_alloc(struct snd_dbuf *b, bus_dma_tag_t dmatag, int dmaflags, unsigned int size);
68 int sndbuf_setup(struct snd_dbuf *b, void *buf, unsigned int size);
69 void sndbuf_free(struct snd_dbuf *b);
70 int sndbuf_resize(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
71 int sndbuf_remalloc(struct snd_dbuf *b, unsigned int blkcnt, unsigned int blksz);
72 void sndbuf_reset(struct snd_dbuf *b);
73 void sndbuf_clear(struct snd_dbuf *b, unsigned int length);
74 void sndbuf_fillsilence(struct snd_dbuf *b);
75 void sndbuf_fillsilence_rl(struct snd_dbuf *b, u_int rl);
76 void sndbuf_softreset(struct snd_dbuf *b);
77 void sndbuf_clearshadow(struct snd_dbuf *b);
78
79 u_int32_t sndbuf_getfmt(struct snd_dbuf *b);
80 int sndbuf_setfmt(struct snd_dbuf *b, u_int32_t fmt);
81 unsigned int sndbuf_getspd(struct snd_dbuf *b);
82 void sndbuf_setspd(struct snd_dbuf *b, unsigned int spd);
83 unsigned int sndbuf_getbps(struct snd_dbuf *b);
84
85 bus_addr_t sndbuf_getbufaddr(struct snd_dbuf *buf);
86
87 void *sndbuf_getbuf(struct snd_dbuf *b);
88 void *sndbuf_getbufofs(struct snd_dbuf *b, unsigned int ofs);
89 unsigned int sndbuf_getsize(struct snd_dbuf *b);
90 unsigned int sndbuf_getmaxsize(struct snd_dbuf *b);
91 unsigned int sndbuf_getallocsize(struct snd_dbuf *b);
92 unsigned int sndbuf_getalign(struct snd_dbuf *b);
93 unsigned int sndbuf_getblkcnt(struct snd_dbuf *b);
94 void sndbuf_setblkcnt(struct snd_dbuf *b, unsigned int blkcnt);
95 unsigned int sndbuf_getblksz(struct snd_dbuf *b);
96 void sndbuf_setblksz(struct snd_dbuf *b, unsigned int blksz);
97 unsigned int sndbuf_runsz(struct snd_dbuf *b);
98 void sndbuf_setrun(struct snd_dbuf *b, int go);
99 struct selinfo *sndbuf_getsel(struct snd_dbuf *b);
100
101 unsigned int sndbuf_getxrun(struct snd_dbuf *b);
102 void sndbuf_setxrun(struct snd_dbuf *b, unsigned int xrun);
103 unsigned int sndbuf_gethwptr(struct snd_dbuf *b);
104 void sndbuf_sethwptr(struct snd_dbuf *b, unsigned int ptr);
105 unsigned int sndbuf_getfree(struct snd_dbuf *b);
106 unsigned int sndbuf_getfreeptr(struct snd_dbuf *b);
107 unsigned int sndbuf_getready(struct snd_dbuf *b);
108 unsigned int sndbuf_getreadyptr(struct snd_dbuf *b);
109 u_int64_t sndbuf_getblocks(struct snd_dbuf *b);
110 u_int64_t sndbuf_getprevblocks(struct snd_dbuf *b);
111 u_int64_t sndbuf_gettotal(struct snd_dbuf *b);
112 u_int64_t sndbuf_getprevtotal(struct snd_dbuf *b);
113 unsigned int sndbuf_xbytes(unsigned int v, struct snd_dbuf *from, struct snd_dbuf *to);
114 u_int8_t sndbuf_zerodata(u_int32_t fmt);
115 void sndbuf_updateprevtotal(struct snd_dbuf *b);
116
117 int sndbuf_acquire(struct snd_dbuf *b, u_int8_t *from, unsigned int count);
118 int sndbuf_dispose(struct snd_dbuf *b, u_int8_t *to, unsigned int count);
119 int sndbuf_feed(struct snd_dbuf *from, struct snd_dbuf *to, struct pcm_channel *channel, struct pcm_feeder *feeder, unsigned int count);
120
121 u_int32_t sndbuf_getflags(struct snd_dbuf *b);
122 void sndbuf_setflags(struct snd_dbuf *b, u_int32_t flags, int on);
123
124 #ifdef OSSV4_EXPERIMENT
125 void sndbuf_getpeaks(struct snd_dbuf *b, int *lp, int *rp);
126 #endif
127
128 static inline u_int32_t
129 snd_xbytes(u_int32_t v, u_int32_t from, u_int32_t to)
130 {
131
132 if (from == to)
133 return (v);
134 if (from == 0)
135 return (0);
136 return ((u_int64_t)v * to / from);
137 }
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