sys/dev/sound/pcm/channel.h

   1 /*-
   2  * Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   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.
  13  *
  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
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/dev/sound/pcm/channel.h,v 1.31.2.1 2005/12/30 19:55:54 netchild Exp $
  27  * $DragonFly: src/sys/dev/sound/pcm/channel.h,v 1.6 2007/06/16 20:07:22 dillon Exp $
  28  */
  29
  30 struct pcmchan_children {
  31         SLIST_ENTRY(pcmchan_children) link;
  32         struct pcm_channel *channel;
  33 };
  34
  35 struct pcmchan_caps {
  36         u_int32_t minspeed, maxspeed;
  37         u_int32_t *fmtlist;
  38         u_int32_t caps;
  39 };
  40
  41 #define CHN_NAMELEN     32
  42 struct pcm_channel {
  43         kobj_t methods;
  44
  45         int num;
  46         pid_t pid;
  47         int refcount;
  48         struct pcm_feeder *feeder;
  49         u_int32_t align;
  50
  51         int volume;
  52         u_int32_t speed;
  53         u_int32_t format;
  54         u_int32_t flags;
  55         u_int32_t feederflags;
  56         u_int32_t blocks;
  57
  58         int direction;
  59         unsigned int interrupts, xruns;
  60         struct snd_dbuf *bufhard, *bufsoft;
  61         struct snddev_info *parentsnddev;
  62         struct pcm_channel *parentchannel;
  63         void *devinfo;
  64         device_t dev;
  65         char name[CHN_NAMELEN];
  66         sndlock_t       lock;
  67         SLIST_HEAD(, pcmchan_children) children;
  68 };
  69
  70 #include "channel_if.h"
  71
  72 int chn_reinit(struct pcm_channel *c);
  73 int chn_write(struct pcm_channel *c, struct uio *buf, int ioflags);
  74 int chn_read(struct pcm_channel *c, struct uio *buf, int ioflags);
  75 u_int32_t chn_start(struct pcm_channel *c, int force);
  76 int chn_sync(struct pcm_channel *c, int threshold);
  77 int chn_flush(struct pcm_channel *c);
  78 int chn_poll(struct pcm_channel *c, int ev, struct thread *td);
  79
  80 int chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction);
  81 int chn_kill(struct pcm_channel *c);
  82 int chn_setdir(struct pcm_channel *c, int dir);
  83 int chn_reset(struct pcm_channel *c, u_int32_t fmt);
  84 int chn_setvolume(struct pcm_channel *c, int left, int right);
  85 int chn_setspeed(struct pcm_channel *c, int speed);
  86 int chn_setformat(struct pcm_channel *c, u_int32_t fmt);
  87 int chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz);
  88 int chn_trigger(struct pcm_channel *c, int go);
  89 int chn_getptr(struct pcm_channel *c);
  90 struct pcmchan_caps *chn_getcaps(struct pcm_channel *c);
  91 u_int32_t chn_getformats(struct pcm_channel *c);
  92
  93 void chn_resetbuf(struct pcm_channel *c);
  94 void chn_intr(struct pcm_channel *c);
  95 int chn_wrfeed(struct pcm_channel *c);
  96 int chn_rdfeed(struct pcm_channel *c);
  97 int chn_abort(struct pcm_channel *c);
  98
  99 void chn_wrupdate(struct pcm_channel *c);
 100 void chn_rdupdate(struct pcm_channel *c);
 101
 102 int chn_notify(struct pcm_channel *c, u_int32_t flags);
 103 void chn_lock(struct pcm_channel *c);
 104 void chn_unlock(struct pcm_channel *c);
 105
 106 #ifdef  USING_MUTEX
 107 #define CHN_LOCK(c) snd_mtxlock(((c)->lock))
 108 #define CHN_UNLOCK(c) snd_mtxunlock(((c)->lock))
 109 #define CHN_LOCKASSERT(c)
 110 #else
 111 #define CHN_LOCK(c)
 112 #define CHN_UNLOCK(c)
 113 #define CHN_LOCKASSERT(c)
 114 #endif
 115
 116 int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist);
 117
 118 #define PCMDIR_VIRTUAL 2
 119 #define PCMDIR_PLAY 1
 120 #define PCMDIR_REC -1
 121
 122 #define PCMTRIG_START 1
 123 #define PCMTRIG_EMLDMAWR 2
 124 #define PCMTRIG_EMLDMARD 3
 125 #define PCMTRIG_STOP 0
 126 #define PCMTRIG_ABORT -1
 127
 128 #define CHN_F_CLOSING           0x00000004  /* a pending close */
 129 #define CHN_F_ABORTING          0x00000008  /* a pending abort */
 130 #define CHN_F_RUNNING           0x00000010  /* dma is running */
 131 #define CHN_F_TRIGGERED         0x00000020
 132 #define CHN_F_NOTRIGGER         0x00000040
 133
 134 #define CHN_F_BUSY              0x00001000  /* has been opened  */
 135 #define CHN_F_HAS_SIZE          0x00002000  /* user set block size */
 136 #define CHN_F_NBIO              0x00004000  /* do non-blocking i/o */
 137 #define CHN_F_MAPPED            0x00010000  /* has been mmap()ed */
 138 #define CHN_F_DEAD              0x00020000
 139 #define CHN_F_BADSETTING        0x00040000
 140 #define CHN_F_SETBLOCKSIZE      0x00080000
 141 #define CHN_F_HAS_VCHAN         0x00100000
 142
 143 #define CHN_F_VIRTUAL           0x10000000  /* not backed by hardware */
 144
 145 #define CHN_F_RESET             (CHN_F_BUSY | CHN_F_DEAD | \
 146                                         CHN_F_HAS_VCHAN | CHN_F_VIRTUAL)
 147
 148
 149 #define CHN_N_RATE              0x00000001
 150 #define CHN_N_FORMAT            0x00000002
 151 #define CHN_N_VOLUME            0x00000004
 152 #define CHN_N_BLOCKSIZE         0x00000008
 153 #define CHN_N_TRIGGER           0x00000010
 154
 155 /*
 156  * This should be large enough to hold all pcm data between
 157  * tsleeps in chn_{read,write} at the highest sample rate.
 158  * (which is usually 48kHz * 16bit * stereo = 192000 bytes/sec)
 159  */
 160 #define CHN_2NDBUFBLKSIZE       (2 * 1024)
 161 /* The total number of blocks per secondary bufhard. */
 162 #define CHN_2NDBUFBLKNUM        (32)
 163 /* The size of a whole secondary bufhard. */
 164 #define CHN_2NDBUFMAXSIZE       (131072)
 165
 166 #define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj))