a580b31a54
in every sense.
General
-------
- Multichannel safe, endian safe, format safe
* Large part of critical pcm filters such as vchan.c, feeder_rate.c,
feeder_volume.c, feeder_fmt.c and feeder.c has been rewritten so that
using them does not cause the pcm data to be converted to 16bit little
endian.
* Macrosses for accessing pcm data safely are defined within sound.h in
the form of PCM_READ_* / PCM_WRITE_*
* Currently, most of them are probably limited for mono/stereo handling,
but the future addition of true multichannel will be much easier.
- Low latency operation
* Well, this require lot more works to do not just within sound driver,
but we're heading towards right direction. Buffer/block sizing within
channel.c is rewritten to calculate precise allocation for various
combination of sample/data/rate size. As a result, applying correct
SNDCTL_DSP_POLICY value will achive expected latency behaviour simmilar
to what commercial 4front driver do.
* Signal handling fix. ctrl+c of "cat /dev/zero > /dev/dsp" does not
result long delay.
* Eliminate sound truncation if the sound data is too small.
DIY:
1) Download / extract
http://people.freebsd.org/~ariff/lowlatency/shortfiles.tar.gz
2) Do a comparison between "cat state*.au > /dev/dsp" and
"for x in state*.au ; do cat $x > /dev/dsp ; done"
- there should be no "perceivable" differences.
Double close for PR kern/31445.
CAVEAT: Low latency come with (unbearable) price especially for poorly
written applications. Applications that trying to act smarter
by requesting (wrong) blocksize/blockcount will suffer the most.
Fixup samples/patches can be found at:
http://people.freebsd.org/~ariff/ports/
- Switch minimum/maximum sampling rate limit to "1" and "2016000" (48k * 42)
due to closer compatibility with 4front driver.
Discussed with: marcus@ (long time ago?)
- All driver specific sysctls in the form of "hw.snd.pcm%d.*" have been
moved to their own dev sysctl nodes, notably:
hw.snd.pcm%d.vchans -> dev.pcm.%d.vchans
Bump __FreeBSD_version.
Driver specific
---------------
- Ditto for sysctls.
- snd_atiixp, snd_es137x, snd_via8233, snd_hda
* Numerous cleanups and fixes.
* _EXPERIMENTAL_ polling mode support using simple callout_* mechanisme.
This was intended for pure debugging and latency measurement, but proven
good enough in few unexpected and rare cases (such as problematic shared
IRQ with GIANT devices - USB). Polling can be enabled/disabled through
dev.pcm.0.polling. Disabled by default.
- snd_ich
* Fix possible overflow during speed calibration. Delay final
initialization (pcm_setstatus) after calibration finished.
PR: kern/100169
Tested by: Kevin Overman <oberman@es.net>
* Inverted EAPD for few Nec VersaPro.
PR: kern/104715
Submitted by: KAWATA Masahiko <kawata@mta.biglobe.ne.jp>
Thanks to various people, notably Joel Dahl, Yuriy Tsibizov, Kevin Oberman,
those at #freebsd-azalia @ freenode and others for testing.
Joel Dahl will do the manpage update.
107 lines
3.9 KiB
C
107 lines
3.9 KiB
C
/*-
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* Copyright (c) 1999 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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#define AC97_MUTE 0x8080
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#define AC97_REG_RESET 0x00
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#define AC97_CAP_MICCHANNEL (1 << 0)
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#define AC97_CAP_TONE (1 << 2)
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#define AC97_CAP_SIMSTEREO (1 << 3)
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#define AC97_CAP_HEADPHONE (1 << 4)
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#define AC97_CAP_LOUDNESS (1 << 5)
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#define AC97_CAP_DAC_18 (1 << 6)
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#define AC97_CAP_DAC_20 (1 << 7)
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#define AC97_CAP_ADC_18 (1 << 8)
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#define AC97_CAP_ADC_20 (1 << 9)
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#define AC97_MIX_MASTER 0x02
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#define AC97_MIX_AUXOUT 0x04
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#define AC97_MIX_MONO 0x06
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#define AC97_MIX_TONE 0x08
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#define AC97_MIX_BEEP 0x0a
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#define AC97_MIX_PHONE 0x0c
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#define AC97_MIX_MIC 0x0e
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#define AC97_MIX_LINE 0x10
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#define AC97_MIX_CD 0x12
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#define AC97_MIX_VIDEO 0x14
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#define AC97_MIX_AUX 0x16
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#define AC97_MIX_PCM 0x18
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#define AC97_REG_RECSEL 0x1a
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#define AC97_MIX_RGAIN 0x1c
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#define AC97_MIX_MGAIN 0x1e
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#define AC97_REG_GEN 0x20
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#define AC97_REG_3D 0x22
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#define AC97_REG_POWER 0x26
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#define AC97_POWER_ADC (1 << 0)
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#define AC97_POWER_DAC (1 << 1)
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#define AC97_POWER_ANL (1 << 2)
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#define AC97_POWER_REF (1 << 3)
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#define AC97_POWER_STATUS (AC97_POWER_ADC | AC97_POWER_DAC | \
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AC97_POWER_REF | AC97_POWER_ANL )
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#define AC97_REGEXT_ID 0x28
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#define AC97_EXTCAP_VRA (1 << 0)
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#define AC97_EXTCAP_DRA (1 << 1)
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#define AC97_EXTCAP_VRM (1 << 3)
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#define AC97_EXTCAPS (AC97_EXTCAP_VRA | AC97_EXTCAP_DRA | AC97_EXTCAP_VRM)
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#define AC97_EXTCAP_SDAC (1 << 7)
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#define AC97_REGEXT_STAT 0x2a
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#define AC97_REGEXT_FDACRATE 0x2c
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#define AC97_REGEXT_SDACRATE 0x2e
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#define AC97_REGEXT_LDACRATE 0x30
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#define AC97_REGEXT_LADCRATE 0x32
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#define AC97_REGEXT_MADCRATE 0x34
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#define AC97_MIXEXT_CLFE 0x36
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#define AC97_MIXEXT_SURROUND 0x38
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#define AC97_REG_ID1 0x7c
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#define AC97_REG_ID2 0x7e
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#define AC97_F_EAPD_INV 0x00000001
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#define AC97_F_RDCD_BUG 0x00000002
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#define AC97_DECLARE(name) static DEFINE_CLASS(name, name ## _methods, sizeof(struct kobj))
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#define AC97_CREATE(dev, devinfo, cls) ac97_create(dev, devinfo, &cls ## _class)
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struct ac97_info;
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#include "ac97_if.h"
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extern kobj_class_t ac97_getmixerclass(void);
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struct ac97_info *ac97_create(device_t dev, void *devinfo, kobj_class_t cls);
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void ac97_destroy(struct ac97_info *codec);
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void ac97_setflags(struct ac97_info *codec, u_int32_t val);
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u_int32_t ac97_getflags(struct ac97_info *codec);
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int ac97_setrate(struct ac97_info *codec, int which, int rate);
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int ac97_setextmode(struct ac97_info *codec, u_int16_t mode);
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u_int16_t ac97_getextmode(struct ac97_info *codec);
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u_int16_t ac97_getextcaps(struct ac97_info *codec);
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u_int16_t ac97_getcaps(struct ac97_info *codec);
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u_int16_t ac97_rdcd(struct ac97_info *codec, int reg);
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void ac97_wrcd(struct ac97_info *codec, int reg, u_int16_t val);
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