285648f9d2
instead of using two malloced arrays for storing channel lists, use an slist. convert the sndstat device to use sbufs and optionally provide more detail about channel state. vchans are software mixed playback channels. they are not enabled by this commit. they use the feeder infrastructure to emulate normal playback channels in a manner transparent to applications, whilst providing as many channels are desired, especially suitable for devices with only one hardware playback channel. in the future they will provide additional features. those wishing to test this functionality will need to add vchan.c to sys/conf/files and use 'sysctl -w hw.snd.pcm0.vchans' to enable it. blocksize and auto-rate selection are not yet supported.
142 lines
2.8 KiB
Objective-C
142 lines
2.8 KiB
Objective-C
# KOBJ
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#
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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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static u_int32_t
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channel_nogetptr(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_nonotify(kobj_t obj, void *data, u_int32_t changed)
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{
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return 0;
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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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struct snd_dbuf *b;
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struct 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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} DEFAULT channel_nogetptr;
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METHOD struct pcmchan_caps* getcaps {
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kobj_t obj;
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void *data;
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};
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METHOD int notify {
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kobj_t obj;
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void *data;
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u_int32_t changed;
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} DEFAULT channel_nonotify;
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