2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
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: src/sys/dev/sound/pcm/channel.h,v 1.5.2.6 2002/04/22 15:49:36 cg Exp $
29 struct pcmchan_children {
30 SLIST_ENTRY(pcmchan_children) link;
31 struct pcm_channel *channel;
35 u_int32_t minspeed, maxspeed;
40 #define CHN_NAMELEN 32
47 struct pcm_feeder *feeder;
54 u_int32_t feederflags;
58 unsigned int interrupts, xruns;
59 struct snd_dbuf *bufhard, *bufsoft;
60 struct snddev_info *parentsnddev;
61 struct pcm_channel *parentchannel;
64 char name[CHN_NAMELEN];
66 SLIST_HEAD(, pcmchan_children) children;
69 #include "channel_if.h"
71 int chn_reinit(struct pcm_channel *c);
72 int chn_write(struct pcm_channel *c, struct uio *buf);
73 int chn_read(struct pcm_channel *c, struct uio *buf);
74 u_int32_t chn_start(struct pcm_channel *c, int force);
75 int chn_sync(struct pcm_channel *c, int threshold);
76 int chn_flush(struct pcm_channel *c);
77 int chn_poll(struct pcm_channel *c, int ev, struct proc *p);
79 int chn_init(struct pcm_channel *c, void *devinfo, int dir);
80 int chn_kill(struct pcm_channel *c);
81 int chn_setdir(struct pcm_channel *c, int dir);
82 int chn_reset(struct pcm_channel *c, u_int32_t fmt);
83 int chn_setvolume(struct pcm_channel *c, int left, int right);
84 int chn_setspeed(struct pcm_channel *c, int speed);
85 int chn_setformat(struct pcm_channel *c, u_int32_t fmt);
86 int chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz);
87 int chn_trigger(struct pcm_channel *c, int go);
88 int chn_getptr(struct pcm_channel *c);
89 struct pcmchan_caps *chn_getcaps(struct pcm_channel *c);
90 u_int32_t chn_getformats(struct pcm_channel *c);
92 void chn_resetbuf(struct pcm_channel *c);
93 void chn_intr(struct pcm_channel *c);
94 int chn_wrfeed(struct pcm_channel *c);
95 int chn_rdfeed(struct pcm_channel *c);
96 int chn_abort(struct pcm_channel *c);
98 void chn_wrupdate(struct pcm_channel *c);
99 void chn_rdupdate(struct pcm_channel *c);
101 int chn_notify(struct pcm_channel *c, u_int32_t flags);
104 #define CHN_LOCK(c) mtx_lock((struct mtx *)((c)->lock))
105 #define CHN_UNLOCK(c) mtx_unlock((struct mtx *)((c)->lock))
106 #define CHN_LOCKASSERT(c)
109 #define CHN_UNLOCK(c)
110 #define CHN_LOCKASSERT(c)
113 int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist);
115 #define PCMDIR_VIRTUAL 2
116 #define PCMDIR_PLAY 1
117 #define PCMDIR_REC -1
119 #define PCMTRIG_START 1
120 #define PCMTRIG_EMLDMAWR 2
121 #define PCMTRIG_EMLDMARD 3
122 #define PCMTRIG_STOP 0
123 #define PCMTRIG_ABORT -1
125 #define CHN_F_CLOSING 0x00000004 /* a pending close */
126 #define CHN_F_ABORTING 0x00000008 /* a pending abort */
127 #define CHN_F_RUNNING 0x00000010 /* dma is running */
128 #define CHN_F_TRIGGERED 0x00000020
129 #define CHN_F_NOTRIGGER 0x00000040
131 #define CHN_F_BUSY 0x00001000 /* has been opened */
132 #define CHN_F_HAS_SIZE 0x00002000 /* user set block size */
133 #define CHN_F_NBIO 0x00004000 /* do non-blocking i/o */
134 #define CHN_F_MAPPED 0x00010000 /* has been mmap()ed */
135 #define CHN_F_DEAD 0x00020000
136 #define CHN_F_BADSETTING 0x00040000
138 #define CHN_F_VIRTUAL 0x10000000 /* not backed by hardware */
140 #define CHN_F_RESET (CHN_F_BUSY | CHN_F_DEAD | CHN_F_VIRTUAL)
142 #define CHN_N_RATE 0x00000001
143 #define CHN_N_FORMAT 0x00000002
144 #define CHN_N_VOLUME 0x00000004
145 #define CHN_N_BLOCKSIZE 0x00000008
146 #define CHN_N_TRIGGER 0x00000010
149 * This should be large enough to hold all pcm data between
150 * tsleeps in chn_{read,write} at the highest sample rate.
151 * (which is usually 48kHz * 16bit * stereo = 192000 bytes/sec)
153 #define CHN_2NDBUFBLKSIZE (2 * 1024)
154 /* The total number of blocks per secondary bufhard. */
155 #define CHN_2NDBUFBLKNUM (32)
156 /* The size of a whole secondary bufhard. */
157 #define CHN_2NDBUFMAXSIZE (131072)
159 #define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj))