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freebsd-dev/sys/dev/sound/pcm/channel.h
Alexander Leidinger 97d69a9620 - channel.h 
* New definition CHN_F_HAS_VCHAN.
- channel.c
  * Use CHN_F_HAS_VCHAN to mark channel with vchan capability instead
    of relying on SLIST_EMPTY(&channel->children) == true for better
    clarification and future possible usages of children (like
    'slave' channel).
  * Various fixes, including blocksize / format bps allignment,
    better 24bit seeking (mplayer, others).
  * Improve format chain building, it's now possible to record something
    to a format non-native to the soundcard through various feeder format
    converters or to higher sampling rate. This also gains another feature,
    like doing vchan mixing on non s16le soundcard such as sb8.
- sound.c
  * Increase robustness within various function that handle vchan
    creation / termination (these function need a total rewrite, but
    that would cause other major rewrite within various places too!).
    As far as its robustness can be guaranteed, leave it as is.
  * Optimize channel ordering, prefer *real* hardware playback
    channels over virtual channels. cat /dev/sndstat should look
    better.
  * Increase sndstat verbosity to include bufsoft/bufhard allocation.
- vchan.c
  * Fix LOR 119.
    - http://sources.zabbadoz.net/freebsd/lor.html#119
  * Reorder / increase robustness of vchan_create() / destroy().
    Enforce destroy_dev() during destroy operation, fix possible
    panic / dangling character device.
    - http://lists.freebsd.org/pipermail/freebsd-current/2005-May/050308.html
  * Tolerate a little bit more during mixing process, this should help
    non s16le soundcards.

Note: Recoring in a non-native rate/format may result in overruns. A friendly
      application is wavrec from audio/wavplay. The problem is under
      investigation.

Submitted by:	Ariff Abdullah <skywizard@MyBSD.org.my>
2005-09-10 18:10:31 +00:00

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/*-
* 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 pcmchan_children {
SLIST_ENTRY(pcmchan_children) link;
struct pcm_channel *channel;
};
struct pcmchan_caps {
u_int32_t minspeed, maxspeed;
u_int32_t *fmtlist;
u_int32_t caps;
};
#define CHN_NAMELEN 32
struct pcm_channel {
kobj_t methods;
int num;
pid_t pid;
int refcount;
struct pcm_feeder *feeder;
u_int32_t align;
int volume;
u_int32_t speed;
u_int32_t format;
u_int32_t flags;
u_int32_t feederflags;
u_int32_t blocks;
int direction;
unsigned int interrupts, xruns;
struct snd_dbuf *bufhard, *bufsoft;
struct snddev_info *parentsnddev;
struct pcm_channel *parentchannel;
void *devinfo;
device_t dev;
char name[CHN_NAMELEN];
struct mtx *lock;
SLIST_HEAD(, pcmchan_children) children;
};
#include "channel_if.h"
int chn_reinit(struct pcm_channel *c);
int chn_write(struct pcm_channel *c, struct uio *buf);
int chn_read(struct pcm_channel *c, struct uio *buf);
u_int32_t chn_start(struct pcm_channel *c, int force);
int chn_sync(struct pcm_channel *c, int threshold);
int chn_flush(struct pcm_channel *c);
int chn_poll(struct pcm_channel *c, int ev, struct thread *td);
int chn_init(struct pcm_channel *c, void *devinfo, int dir, int direction);
int chn_kill(struct pcm_channel *c);
int chn_setdir(struct pcm_channel *c, int dir);
int chn_reset(struct pcm_channel *c, u_int32_t fmt);
int chn_setvolume(struct pcm_channel *c, int left, int right);
int chn_setspeed(struct pcm_channel *c, int speed);
int chn_setformat(struct pcm_channel *c, u_int32_t fmt);
int chn_setblocksize(struct pcm_channel *c, int blkcnt, int blksz);
int chn_trigger(struct pcm_channel *c, int go);
int chn_getptr(struct pcm_channel *c);
struct pcmchan_caps *chn_getcaps(struct pcm_channel *c);
u_int32_t chn_getformats(struct pcm_channel *c);
void chn_resetbuf(struct pcm_channel *c);
void chn_intr(struct pcm_channel *c);
int chn_wrfeed(struct pcm_channel *c);
int chn_rdfeed(struct pcm_channel *c);
int chn_abort(struct pcm_channel *c);
void chn_wrupdate(struct pcm_channel *c);
void chn_rdupdate(struct pcm_channel *c);
int chn_notify(struct pcm_channel *c, u_int32_t flags);
void chn_lock(struct pcm_channel *c);
void chn_unlock(struct pcm_channel *c);
#ifdef USING_MUTEX
#define CHN_LOCK(c) mtx_lock((struct mtx *)((c)->lock))
#define CHN_UNLOCK(c) mtx_unlock((struct mtx *)((c)->lock))
#define CHN_LOCKASSERT(c) mtx_assert((struct mtx *)((c)->lock), MA_OWNED)
#else
#define CHN_LOCK(c)
#define CHN_UNLOCK(c)
#define CHN_LOCKASSERT(c)
#endif
int fmtvalid(u_int32_t fmt, u_int32_t *fmtlist);
#define PCMDIR_VIRTUAL 2
#define PCMDIR_PLAY 1
#define PCMDIR_REC -1
#define PCMTRIG_START 1
#define PCMTRIG_EMLDMAWR 2
#define PCMTRIG_EMLDMARD 3
#define PCMTRIG_STOP 0
#define PCMTRIG_ABORT -1
#define CHN_F_CLOSING 0x00000004 /* a pending close */
#define CHN_F_ABORTING 0x00000008 /* a pending abort */
#define CHN_F_RUNNING 0x00000010 /* dma is running */
#define CHN_F_TRIGGERED 0x00000020
#define CHN_F_NOTRIGGER 0x00000040
#define CHN_F_BUSY 0x00001000 /* has been opened */
#define CHN_F_HAS_SIZE 0x00002000 /* user set block size */
#define CHN_F_NBIO 0x00004000 /* do non-blocking i/o */
#define CHN_F_MAPPED 0x00010000 /* has been mmap()ed */
#define CHN_F_DEAD 0x00020000
#define CHN_F_BADSETTING 0x00040000
#define CHN_F_SETBLOCKSIZE 0x00080000
#define CHN_F_HAS_VCHAN 0x00100000
#define CHN_F_VIRTUAL 0x10000000 /* not backed by hardware */
#define CHN_F_RESET (CHN_F_BUSY | CHN_F_DEAD | \
CHN_F_HAS_VCHAN | CHN_F_VIRTUAL)
#define CHN_N_RATE 0x00000001
#define CHN_N_FORMAT 0x00000002
#define CHN_N_VOLUME 0x00000004
#define CHN_N_BLOCKSIZE 0x00000008
#define CHN_N_TRIGGER 0x00000010
/*
* This should be large enough to hold all pcm data between
* tsleeps in chn_{read,write} at the highest sample rate.
* (which is usually 48kHz * 16bit * stereo = 192000 bytes/sec)
*/
#define CHN_2NDBUFBLKSIZE (2 * 1024)
/* The total number of blocks per secondary bufhard. */
#define CHN_2NDBUFBLKNUM (32)
/* The size of a whole secondary bufhard. */
#define CHN_2NDBUFMAXSIZE (131072)
#define CHANNEL_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj))
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