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https://github.com/freebsd/freebsd-src
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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.
138 lines
3.5 KiB
C
138 lines
3.5 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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#include <dev/sound/pcm/sound.h>
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static u_int32_t fk_fmt[] = {
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AFMT_U8,
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AFMT_STEREO | AFMT_U8,
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AFMT_S8,
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AFMT_STEREO | AFMT_S8,
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AFMT_S16_LE,
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AFMT_STEREO | AFMT_S16_LE,
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AFMT_U16_LE,
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AFMT_STEREO | AFMT_U16_LE,
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AFMT_S16_BE,
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AFMT_STEREO | AFMT_S16_BE,
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AFMT_U16_BE,
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AFMT_STEREO | AFMT_U16_BE,
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0
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};
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static struct pcmchan_caps fk_caps = {0, 1000000, fk_fmt, 0};
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#define FKBUFSZ 4096
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static char fakebuf[FKBUFSZ];
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/* channel interface */
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static void *
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fkchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
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{
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sndbuf_setup(b, fakebuf, FKBUFSZ);
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return (void *)0xbabef00d;
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}
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static int
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fkchan_free(kobj_t obj, void *data)
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{
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return 0;
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}
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static int
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fkchan_setformat(kobj_t obj, void *data, u_int32_t format)
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{
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return 0;
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}
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static int
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fkchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
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{
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return speed;
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}
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static int
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fkchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
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{
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return blocksize;
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}
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static int
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fkchan_trigger(kobj_t obj, void *data, int go)
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{
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return 0;
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}
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static int
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fkchan_getptr(kobj_t obj, void *data)
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{
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return 0;
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}
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static struct pcmchan_caps *
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fkchan_getcaps(kobj_t obj, void *data)
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{
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return &fk_caps;
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}
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static kobj_method_t fkchan_methods[] = {
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KOBJMETHOD(channel_init, fkchan_init),
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KOBJMETHOD(channel_free, fkchan_free),
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KOBJMETHOD(channel_setformat, fkchan_setformat),
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KOBJMETHOD(channel_setspeed, fkchan_setspeed),
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KOBJMETHOD(channel_setblocksize, fkchan_setblocksize),
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KOBJMETHOD(channel_trigger, fkchan_trigger),
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KOBJMETHOD(channel_getptr, fkchan_getptr),
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KOBJMETHOD(channel_getcaps, fkchan_getcaps),
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{ 0, 0 }
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};
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CHANNEL_DECLARE(fkchan);
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struct pcm_channel *
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fkchan_setup(device_t dev)
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{
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struct snddev_info *d = device_get_softc(dev);
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struct pcm_channel *c;
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c = malloc(sizeof(*c), M_DEVBUF, M_WAITOK);
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c->methods = kobj_create(&fkchan_class, M_DEVBUF, M_WAITOK);
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c->parent = d;
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snprintf(c->name, CHN_NAMELEN, "%s:fake", device_get_nameunit(dev));
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return c;
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}
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int
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fkchan_kill(struct pcm_channel *c)
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{
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kobj_delete(c->methods, M_DEVBUF);
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c->methods = NULL;
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free(c, M_DEVBUF);
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return 0;
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}
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