freebsd-skq/sys/dev/sound/pcm/feeder.h
Ariff Abdullah d9bd844573 Various fixups:
feeder.h:
 feeder.c:
	- Implement scoring mechanisme to select best format for conversion.
	  This is actually part of newer format chaining procedures which
	  will be commited someday. Confusion during chaining process solved
	  by this scoring since it will try to reduce list of from/to formats
	  to a single, best format.
	  Related PR:	kern/91683
channel.c:
	- Simplify feeder building process since we have smarter format
	  chaining.

feeder_fmt.c:
	- Add few more sign conversion feeders for 24 and 32 bit format.

feeder_rate.c:
	- Force buffer / bytes allignment. Unaligned buffer may cause
	  panics during recording on pure 32bit sample format if it
	  involves feeder_rate as part of feeders chain.
	  Tested on: ATI IXP, force 32bit recording.

MFC after:	5 days
2006-01-22 15:06:49 +00:00

89 lines
2.9 KiB
C

/*-
* Copyright (c) 1999 Cameron Grant <cg@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
struct pcm_feederdesc {
u_int32_t type;
u_int32_t in, out;
u_int32_t flags;
int idx;
};
struct feeder_class {
KOBJ_CLASS_FIELDS;
int align;
struct pcm_feederdesc *desc;
void *data;
};
struct pcm_feeder {
KOBJ_FIELDS;
int align;
struct pcm_feederdesc *desc, desc_static;
void *data;
struct feeder_class *class;
struct pcm_feeder *source, *parent;
};
void feeder_register(void *p);
struct feeder_class *feeder_getclass(struct pcm_feederdesc *desc);
int chn_fmtscore(u_int32_t fmt);
u_int32_t chn_fmtbestbit(u_int32_t fmt, u_int32_t *fmts);
u_int32_t chn_fmtbeststereo(u_int32_t fmt, u_int32_t *fmts);
u_int32_t chn_fmtbest(u_int32_t fmt, u_int32_t *fmts);
u_int32_t chn_fmtchain(struct pcm_channel *c, u_int32_t *to);
int chn_addfeeder(struct pcm_channel *c, struct feeder_class *fc, struct pcm_feederdesc *desc);
int chn_removefeeder(struct pcm_channel *c);
struct pcm_feeder *chn_findfeeder(struct pcm_channel *c, u_int32_t type);
void feeder_printchain(struct pcm_feeder *head);
#define FEEDER_DECLARE(feeder, palign, pdata) \
static struct feeder_class feeder ## _class = { \
.name = #feeder, \
.methods = feeder ## _methods, \
.size = sizeof(struct pcm_feeder), \
.align = palign, \
.desc = feeder ## _desc, \
.data = pdata, \
}; \
SYSINIT(feeder, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, feeder_register, &feeder ## _class);
#define FEEDER_ROOT 1
#define FEEDER_FMT 2
#define FEEDER_MIXER 3
#define FEEDER_RATE 4
#define FEEDER_FILTER 5
#define FEEDER_VOLUME 6
#define FEEDER_LAST FEEDER_VOLUME
#define FEEDRATE_SRC 1
#define FEEDRATE_DST 2