0f55ac6c1a
this gives us several benefits, including: * easier extensibility- new optional methods can be added to ac97/mixer/channel classes without having to fixup every driver. * forward compatibility for drivers, provided no new mandatory methods are added.
124 lines
2.5 KiB
Objective-C
124 lines
2.5 KiB
Objective-C
#
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# Copyright (c) 2000 Cameron Grant <cg@freebsd.org>
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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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INTERFACE channel;
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CODE {
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static int
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channel_nosetdir(kobj_t obj, void *data, int dir)
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{
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return 0;
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}
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static int
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channel_noreset(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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channel_noresetdone(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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channel_nofree(kobj_t obj, void *data)
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{
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return 1;
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}
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};
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METHOD void* init {
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kobj_t obj;
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void *devinfo;
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snd_dbuf *b;
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pcm_channel *c;
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int dir;
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};
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METHOD int free {
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kobj_t obj;
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void *data;
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} DEFAULT channel_nofree;
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METHOD int reset {
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kobj_t obj;
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void *data;
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} DEFAULT channel_noreset;
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METHOD int resetdone {
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kobj_t obj;
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void *data;
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} DEFAULT channel_noresetdone;
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METHOD int setdir {
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kobj_t obj;
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void *data;
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int dir;
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} DEFAULT channel_nosetdir;
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METHOD u_int32_t setformat {
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kobj_t obj;
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void *data;
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u_int32_t format;
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};
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METHOD u_int32_t setspeed {
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kobj_t obj;
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void *data;
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u_int32_t speed;
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};
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METHOD u_int32_t setblocksize {
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kobj_t obj;
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void *data;
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u_int32_t blocksize;
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};
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METHOD int trigger {
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kobj_t obj;
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void *data;
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int go;
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};
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METHOD u_int32_t getptr {
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kobj_t obj;
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void *data;
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};
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METHOD pcmchan_caps* getcaps {
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kobj_t obj;
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void *data;
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};
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