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 struct pcmchan_children {
30 SLIST_ENTRY(pcmchan_children) link;
31 struct pcm_channel *channel;
35 u_int32_t minspeed, maxspeed;
40 /* Forward declarations */
42 struct pcmchan_syncgroup;
43 struct pcmchan_syncmember;
45 extern struct mtx snd_pcm_syncgroups_mtx;
46 extern SLIST_HEAD(pcm_synclist, pcmchan_syncgroup) snd_pcm_syncgroups;
48 #define PCM_SG_LOCK() mtx_lock(&snd_pcm_syncgroups_mtx)
49 #define PCM_SG_TRYLOCK() mtx_trylock(&snd_pcm_syncgroups_mtx)
50 #define PCM_SG_UNLOCK() mtx_unlock(&snd_pcm_syncgroups_mtx)
51 #define PCM_SG_LOCKASSERT(arg) mtx_assert(&snd_pcm_syncgroups_mtx, arg)
54 * @brief Specifies an audio device sync group
56 struct pcmchan_syncgroup {
57 SLIST_ENTRY(pcmchan_syncgroup) link;
58 SLIST_HEAD(, pcmchan_syncmember) members;
59 int id; /**< Group identifier; set to address of group. */
63 * @brief Specifies a container for members of a sync group
65 struct pcmchan_syncmember {
66 SLIST_ENTRY(pcmchan_syncmember) link;
67 struct pcmchan_syncgroup *parent; /**< group head */
68 struct pcm_channel *ch;
71 #define CHN_NAMELEN 32
78 struct pcm_feeder *feeder;
85 u_int32_t feederflags;
89 unsigned int interrupts, xruns;
90 struct snd_dbuf *bufhard, *bufsoft;
91 struct snddev_info *parentsnddev;
92 struct pcm_channel *parentchannel;
95 char name[CHN_NAMELEN];
98 * Increment,decrement this around operations that temporarily yield
103 * Special channel operations should examine @c inprog after acquiring
104 * lock. If zero, operations may continue. Else, thread should
105 * wait on this cv for previous operation to finish.
109 * Low water mark for select()/poll().
111 * This is initialized to the channel's fragment size, and will be
112 * overwritten if a new fragment size is set. Users may alter this
113 * value directly with the @c SNDCTL_DSP_LOW_WATER ioctl.
117 * If part of a sync group, this will point to the syncmember
120 struct pcmchan_syncmember *sm;
121 #ifdef OSSV4_EXPERIMENT
122 u_int16_t lpeak, rpeak; /**< Peak value from 0-32767. */
124 SLIST_HEAD(, pcmchan_children) children;
127 #include "channel_if.h"
129 int chn_reinit(struct pcm_channel *c);
130 int chn_write(struct pcm_channel *c, struct uio *buf);
131 int chn_read(struct pcm_channel *c, struct uio *buf);
132 u_int32_t chn_start(struct pcm_channel *c, int force);
133 int chn_sync(struct pcm_channel *c, int threshold);
134 int chn_flush(struct pcm_channel *c);
135 int chn_poll(struct pcm_channel *c, int ev, struct thread *td);
137 int chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction);
138 int chn_kill(struct pcm_channel *c);
139 int chn_setdir(struct pcm_channel *c, int dir);
140 int chn_reset(struct pcm_channel *c, u_int32_t fmt);
141 int chn_setvolume(struct pcm_channel *c, int left, int right);
142 int chn_setspeed(struct pcm_channel *c, int speed);
143 int chn_setformat(struct pcm_channel *c, u_int32_t fmt);
144 int chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz);
145 int chn_trigger(struct pcm_channel *c, int go);
146 int chn_getptr(struct pcm_channel *c);
147 struct pcmchan_caps *chn_getcaps(struct pcm_channel *c);
148 u_int32_t chn_getformats(struct pcm_channel *c);
150 void chn_resetbuf(struct pcm_channel *c);
151 void chn_intr(struct pcm_channel *c);
152 int chn_wrfeed(struct pcm_channel *c);
153 int chn_rdfeed(struct pcm_channel *c);
154 int chn_abort(struct pcm_channel *c);
156 void chn_wrupdate(struct pcm_channel *c);
157 void chn_rdupdate(struct pcm_channel *c);
159 int chn_notify(struct pcm_channel *c, u_int32_t flags);
160 void chn_lock(struct pcm_channel *c);
161 void chn_unlock(struct pcm_channel *c);
163 int chn_getrates(struct pcm_channel *c, int **rates);
164 int chn_syncdestroy(struct pcm_channel *c);
166 #ifdef OSSV4_EXPERIMENT
167 int chn_getpeaks(struct pcm_channel *c, int *lpeak, int *rpeak);
171 #define CHN_LOCK(c) mtx_lock((struct mtx *)((c)->lock))
172 #define CHN_UNLOCK(c) mtx_unlock((struct mtx *)((c)->lock))
173 #define CHN_TRYLOCK(c) mtx_trylock((struct mtx *)((c)->lock))
174 #define CHN_LOCKASSERT(c) mtx_assert((struct mtx *)((c)->lock), MA_OWNED)
177 #define CHN_UNLOCK(c)
178 #define CHN_TRYLOCK(c)
179 #define CHN_LOCKASSERT(c)
182 int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist);
184 #define PCMDIR_VIRTUAL 2
185 #define PCMDIR_PLAY 1
186 #define PCMDIR_REC -1
188 #define PCMTRIG_START 1
189 #define PCMTRIG_EMLDMAWR 2
190 #define PCMTRIG_EMLDMARD 3
191 #define PCMTRIG_STOP 0
192 #define PCMTRIG_ABORT -1
194 #define CHN_F_CLOSING 0x00000004 /* a pending close */
195 #define CHN_F_ABORTING 0x00000008 /* a pending abort */
196 #define CHN_F_RUNNING 0x00000010 /* dma is running */
197 #define CHN_F_TRIGGERED 0x00000020
198 #define CHN_F_NOTRIGGER 0x00000040
200 #define CHN_F_BUSY 0x00001000 /* has been opened */
201 #define CHN_F_HAS_SIZE 0x00002000 /* user set block size */
202 #define CHN_F_NBIO 0x00004000 /* do non-blocking i/o */
203 #define CHN_F_MAPPED 0x00010000 /* has been mmap()ed */
204 #define CHN_F_DEAD 0x00020000
205 #define CHN_F_BADSETTING 0x00040000
206 #define CHN_F_SETBLOCKSIZE 0x00080000
207 #define CHN_F_HAS_VCHAN 0x00100000
209 #define CHN_F_VIRTUAL 0x10000000 /* not backed by hardware */
211 #define CHN_F_RESET (CHN_F_BUSY | CHN_F_DEAD | \
212 CHN_F_HAS_VCHAN | CHN_F_VIRTUAL)
215 #define CHN_N_RATE 0x00000001
216 #define CHN_N_FORMAT 0x00000002
217 #define CHN_N_VOLUME 0x00000004
218 #define CHN_N_BLOCKSIZE 0x00000008
219 #define CHN_N_TRIGGER 0x00000010
222 * This should be large enough to hold all pcm data between
223 * tsleeps in chn_{read,write} at the highest sample rate.
224 * (which is usually 48kHz * 16bit * stereo = 192000 bytes/sec)
226 #define CHN_2NDBUFBLKSIZE (2 * 1024)
227 /* The total number of blocks per secondary bufhard. */
228 #define CHN_2NDBUFBLKNUM (32)
229 /* The size of a whole secondary bufhard. */
230 #define CHN_2NDBUFMAXSIZE (131072)
232 #define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj))