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
26 * $FreeBSD: head/sys/dev/sound/pcm/buffer.h 230845 2012-01-31 21:46:28Z mav $
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
35 #define SNDBUF_F_MANAGED 0x00000008
37 #define SNDBUF_NAMELEN 48
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 */
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
;
60 struct pcm_channel
*channel
;
61 char name
[SNDBUF_NAMELEN
];
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
);
67 void sndbuf_dump(struct snd_dbuf
*b
, char *s
, u_int32_t what
);
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
);
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
);
87 bus_addr_t
sndbuf_getbufaddr(struct snd_dbuf
*buf
);
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
);
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
);
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
);
123 u_int32_t
sndbuf_getflags(struct snd_dbuf
*b
);
124 void sndbuf_setflags(struct snd_dbuf
*b
, u_int32_t flags
, int on
);
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
);
132 #ifdef OSSV4_EXPERIMENT
133 void sndbuf_getpeaks(struct snd_dbuf
*b
, int *lp
, int *rp
);
136 static inline u_int32_t
137 snd_xbytes(u_int32_t v
, u_int32_t from
, u_int32_t to
)
144 return ((u_int64_t
)v
* to
/ from
);