1 /* 2 * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk> 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 1.5.2.6 2002/04/22 15:49:36 cg Exp $ 27 */ 28 29 struct pcmchan_children { 30 SLIST_ENTRY(pcmchan_children) link; 31 struct pcm_channel *channel; 32 }; 33 34 struct pcmchan_caps { 35 u_int32_t minspeed, maxspeed; 36 u_int32_t *fmtlist; 37 u_int32_t caps; 38 }; 39 40 #define CHN_NAMELEN 32 41 struct pcm_channel { 42 kobj_t methods; 43 44 int num; 45 pid_t pid; 46 int refcount; 47 struct pcm_feeder *feeder; 48 u_int32_t align; 49 50 int volume; 51 u_int32_t speed; 52 u_int32_t format; 53 u_int32_t flags; 54 u_int32_t feederflags; 55 u_int32_t blocks; 56 57 int direction; 58 unsigned int interrupts, xruns; 59 struct snd_dbuf *bufhard, *bufsoft; 60 struct snddev_info *parentsnddev; 61 struct pcm_channel *parentchannel; 62 void *devinfo; 63 device_t dev; 64 char name[CHN_NAMELEN]; 65 void *lock; 66 SLIST_HEAD(, pcmchan_children) children; 67 }; 68 69 #include "channel_if.h" 70 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); 78 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); 91 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); 97 98 void chn_wrupdate(struct pcm_channel *c); 99 void chn_rdupdate(struct pcm_channel *c); 100 101 int chn_notify(struct pcm_channel *c, u_int32_t flags); 102 103 #ifdef USING_MUTEX 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) 107 #else 108 #define CHN_LOCK(c) 109 #define CHN_UNLOCK(c) 110 #define CHN_LOCKASSERT(c) 111 #endif 112 113 int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist); 114 115 #define PCMDIR_VIRTUAL 2 116 #define PCMDIR_PLAY 1 117 #define PCMDIR_REC -1 118 119 #define PCMTRIG_START 1 120 #define PCMTRIG_EMLDMAWR 2 121 #define PCMTRIG_EMLDMARD 3 122 #define PCMTRIG_STOP 0 123 #define PCMTRIG_ABORT -1 124 125 #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 130 131 #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 137 138 #define CHN_F_VIRTUAL 0x10000000 /* not backed by hardware */ 139 140 #define CHN_F_RESET (CHN_F_BUSY | CHN_F_DEAD | CHN_F_VIRTUAL) 141 142 #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 147 148 /* 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) 152 */ 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) 158 159 #define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj)) 160