160 lines
5.2 KiB
C
160 lines
5.2 KiB
C
/*
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* Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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struct pcmchan_children {
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SLIST_ENTRY(pcmchan_children) link;
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struct pcm_channel *channel;
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};
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struct pcmchan_caps {
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u_int32_t minspeed, maxspeed;
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u_int32_t *fmtlist;
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u_int32_t caps;
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};
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#define CHN_NAMELEN 32
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struct pcm_channel {
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kobj_t methods;
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int num;
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pid_t pid;
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int refcount;
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struct pcm_feeder *feeder;
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u_int32_t align;
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int volume;
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u_int32_t speed;
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u_int32_t format;
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u_int32_t flags;
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u_int32_t feederflags;
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u_int32_t blocks;
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int direction;
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unsigned int interrupts, xruns;
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struct snd_dbuf *bufhard, *bufsoft;
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struct snddev_info *parentsnddev;
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struct pcm_channel *parentchannel;
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void *devinfo;
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device_t dev;
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char name[CHN_NAMELEN];
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struct mtx *lock;
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SLIST_HEAD(, pcmchan_children) children;
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};
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#include "channel_if.h"
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int chn_reinit(struct pcm_channel *c);
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int chn_write(struct pcm_channel *c, struct uio *buf);
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int chn_read(struct pcm_channel *c, struct uio *buf);
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u_int32_t chn_start(struct pcm_channel *c, int force);
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int chn_sync(struct pcm_channel *c, int threshold);
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int chn_flush(struct pcm_channel *c);
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int chn_poll(struct pcm_channel *c, int ev, struct thread *td);
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int chn_init(struct pcm_channel *c, void *devinfo, int dir);
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int chn_kill(struct pcm_channel *c);
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int chn_setdir(struct pcm_channel *c, int dir);
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int chn_reset(struct pcm_channel *c, u_int32_t fmt);
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int chn_setvolume(struct pcm_channel *c, int left, int right);
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int chn_setspeed(struct pcm_channel *c, int speed);
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int chn_setformat(struct pcm_channel *c, u_int32_t fmt);
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int chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz);
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int chn_trigger(struct pcm_channel *c, int go);
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int chn_getptr(struct pcm_channel *c);
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struct pcmchan_caps *chn_getcaps(struct pcm_channel *c);
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u_int32_t chn_getformats(struct pcm_channel *c);
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void chn_resetbuf(struct pcm_channel *c);
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void chn_intr(struct pcm_channel *c);
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int chn_wrfeed(struct pcm_channel *c);
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int chn_rdfeed(struct pcm_channel *c);
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int chn_abort(struct pcm_channel *c);
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void chn_wrupdate(struct pcm_channel *c);
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void chn_rdupdate(struct pcm_channel *c);
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int chn_notify(struct pcm_channel *c, u_int32_t flags);
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#ifdef USING_MUTEX
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#define CHN_LOCK(c) mtx_lock((struct mtx *)((c)->lock))
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#define CHN_UNLOCK(c) mtx_unlock((struct mtx *)((c)->lock))
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#define CHN_LOCKASSERT(c)
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#else
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#define CHN_LOCK(c)
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#define CHN_UNLOCK(c)
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#define CHN_LOCKASSERT(c)
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#endif
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int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist);
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#define PCMDIR_VIRTUAL 2
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#define PCMDIR_PLAY 1
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#define PCMDIR_REC -1
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#define PCMTRIG_START 1
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#define PCMTRIG_EMLDMAWR 2
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#define PCMTRIG_EMLDMARD 3
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#define PCMTRIG_STOP 0
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#define PCMTRIG_ABORT -1
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#define CHN_F_CLOSING 0x00000004 /* a pending close */
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#define CHN_F_ABORTING 0x00000008 /* a pending abort */
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#define CHN_F_RUNNING 0x00000010 /* dma is running */
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#define CHN_F_TRIGGERED 0x00000020
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#define CHN_F_NOTRIGGER 0x00000040
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#define CHN_F_BUSY 0x00001000 /* has been opened */
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#define CHN_F_HAS_SIZE 0x00002000 /* user set block size */
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#define CHN_F_NBIO 0x00004000 /* do non-blocking i/o */
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#define CHN_F_MAPPED 0x00010000 /* has been mmap()ed */
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#define CHN_F_DEAD 0x00020000
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#define CHN_F_BADSETTING 0x00040000
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#define CHN_F_VIRTUAL 0x10000000 /* not backed by hardware */
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#define CHN_F_RESET (CHN_F_BUSY | CHN_F_DEAD | CHN_F_VIRTUAL)
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#define CHN_N_RATE 0x00000001
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#define CHN_N_FORMAT 0x00000002
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#define CHN_N_VOLUME 0x00000004
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#define CHN_N_BLOCKSIZE 0x00000008
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#define CHN_N_TRIGGER 0x00000010
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/*
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* This should be large enough to hold all pcm data between
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* tsleeps in chn_{read,write} at the highest sample rate.
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* (which is usually 48kHz * 16bit * stereo = 192000 bytes/sec)
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*/
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#define CHN_2NDBUFBLKSIZE (2 * 1024)
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/* The total number of blocks per secondary bufhard. */
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#define CHN_2NDBUFBLKNUM (32)
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/* The size of a whole secondary bufhard. */
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#define CHN_2NDBUFMAXSIZE (131072)
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#define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj))
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