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66ef8af5b0
this introduces a new buffering mechanism which results in dramatic simplification of the channel manager. as several structures have changed, we take the opportunity to move their definitions into the source files where they are used, make them private and de-typedef them. the sound drivers are updated to use snd_setup_intr instead of bus_setup_intr, and to comply with the de-typedefed structures. the ac97, mixer and channel layers have been updated with finegrained locking, as have some drivers- not all though. the rest will follow soon.
133 lines
4.6 KiB
C
133 lines
4.6 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_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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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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struct snd_dbuf *bufhard, *bufsoft;
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struct snddev_info *parent;
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void *devinfo;
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char name[CHN_NAMELEN];
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void *lock;
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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 proc *p);
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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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#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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int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist);
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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_RESET (CHN_F_BUSY | CHN_F_DEAD)
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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 CHN_DEFAULT_HZ 50
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#define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj))
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