2005-01-06 01:43:34 +00:00
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/*-
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2000-07-03 21:00:44 +00:00
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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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2007-01-31 08:53:45 +00:00
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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2000-07-03 21:00:44 +00:00
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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2007-01-31 08:53:45 +00:00
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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2000-07-03 21:00:44 +00:00
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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Sound Mega-commit. Expect further cleanup until code freeze.
For a slightly thorough explaination, please refer to
[1] http://people.freebsd.org/~ariff/SOUND_4.TXT.html .
Summary of changes includes:
1 Volume Per-Channel (vpc). Provides private / standalone volume control
unique per-stream pcm channel without touching master volume / pcm.
Applications can directly use SNDCTL_DSP_[GET|SET][PLAY|REC]VOL, or for
backwards compatibility, SOUND_MIXER_PCM through the opened dsp device
instead of /dev/mixer. Special "bypass" mode is enabled through
/dev/mixer which will automatically detect if the adjustment is made
through /dev/mixer and forward its request to this private volume
controller. Changes to this volume object will not interfere with
other channels.
Requirements:
- SNDCTL_DSP_[GET|SET][PLAY|REC]_VOL are newer ioctls (OSSv4) which
require specific application modifications (preferred).
- No modifications required for using bypass mode, so applications
like mplayer or xmms should work out of the box.
Kernel hints:
- hint.pcm.%d.vpc (0 = disable vpc).
Kernel sysctls:
- hw.snd.vpc_mixer_bypass (default: 1). Enable or disable /dev/mixer
bypass mode.
- hw.snd.vpc_autoreset (default: 1). By default, closing/opening
/dev/dsp will reset the volume back to 0 db gain/attenuation.
Setting this to 0 will preserve its settings across device
closing/opening.
- hw.snd.vpc_reset (default: 0). Panic/reset button to reset all
volume settings back to 0 db.
- hw.snd.vpc_0db (default: 45). 0 db relative to linear mixer value.
2 High quality fixed-point Bandlimited SINC sampling rate converter,
based on Julius O'Smith's Digital Audio Resampling -
http://ccrma.stanford.edu/~jos/resample/. It includes a filter design
script written in awk (the clumsiest joke I've ever written)
- 100% 32bit fixed-point, 64bit accumulator.
- Possibly among the fastest (if not fastest) of its kind.
- Resampling quality is tunable, either runtime or during kernel
compilation (FEEDER_RATE_PRESETS).
- Quality can be further customized during kernel compilation by
defining FEEDER_RATE_PRESETS in /etc/make.conf.
Kernel sysctls:
- hw.snd.feeder_rate_quality.
0 - Zero-order Hold (ZOH). Fastest, bad quality.
1 - Linear Interpolation (LINEAR). Slightly slower than ZOH,
better quality but still does not eliminate aliasing.
2 - (and above) - Sinc Interpolation(SINC). Best quality. SINC
quality always start from 2 and above.
Rough quality comparisons:
- http://people.freebsd.org/~ariff/z_comparison/
3 Bit-perfect mode. Bypasses all feeder/dsp effects. Pure sound will be
directly fed into the hardware.
4 Parametric (compile time) Software Equalizer (Bass/Treble mixer). Can
be customized by defining FEEDER_EQ_PRESETS in /etc/make.conf.
5 Transparent/Adaptive Virtual Channel. Now you don't have to disable
vchans in order to make digital format pass through. It also makes
vchans more dynamic by choosing a better format/rate among all the
concurrent streams, which means that dev.pcm.X.play.vchanformat/rate
becomes sort of optional.
6 Exclusive Stream, with special open() mode O_EXCL. This will "mute"
other concurrent vchan streams and only allow a single channel with
O_EXCL set to keep producing sound.
Other Changes:
* most feeder_* stuffs are compilable in userland. Let's not
speculate whether we should go all out for it (save that for
FreeBSD 16.0-RELEASE).
* kobj signature fixups, thanks to Andriy Gapon <avg@freebsd.org>
* pull out channel mixing logic out of vchan.c and create its own
feeder_mixer for world justice.
* various refactoring here and there, for good or bad.
* activation of few more OSSv4 ioctls() (see [1] above).
* opt_snd.h for possible compile time configuration:
(mostly for debugging purposes, don't try these at home)
SND_DEBUG
SND_DIAGNOSTIC
SND_FEEDER_MULTIFORMAT
SND_FEEDER_FULL_MULTIFORMAT
SND_FEEDER_RATE_HP
SND_PCM_64
SND_OLDSTEREO
Manual page updates are on the way.
Tested by: joel, Olivier SMEDTS <olivier at gid0 d org>, too many
unsung / unnamed heroes.
2009-06-07 19:12:08 +00:00
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#ifdef HAVE_KERNEL_OPTION_HEADERS
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#include "opt_snd.h"
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#endif
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2000-07-03 21:00:44 +00:00
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#include <dev/sound/pcm/sound.h>
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static int
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snd_modevent(module_t mod, int type, void *data)
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{
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switch (type) {
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case MOD_LOAD:
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break;
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case MOD_UNLOAD:
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break;
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default:
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Sound Mega-commit. Expect further cleanup until code freeze.
For a slightly thorough explaination, please refer to
[1] http://people.freebsd.org/~ariff/SOUND_4.TXT.html .
Summary of changes includes:
1 Volume Per-Channel (vpc). Provides private / standalone volume control
unique per-stream pcm channel without touching master volume / pcm.
Applications can directly use SNDCTL_DSP_[GET|SET][PLAY|REC]VOL, or for
backwards compatibility, SOUND_MIXER_PCM through the opened dsp device
instead of /dev/mixer. Special "bypass" mode is enabled through
/dev/mixer which will automatically detect if the adjustment is made
through /dev/mixer and forward its request to this private volume
controller. Changes to this volume object will not interfere with
other channels.
Requirements:
- SNDCTL_DSP_[GET|SET][PLAY|REC]_VOL are newer ioctls (OSSv4) which
require specific application modifications (preferred).
- No modifications required for using bypass mode, so applications
like mplayer or xmms should work out of the box.
Kernel hints:
- hint.pcm.%d.vpc (0 = disable vpc).
Kernel sysctls:
- hw.snd.vpc_mixer_bypass (default: 1). Enable or disable /dev/mixer
bypass mode.
- hw.snd.vpc_autoreset (default: 1). By default, closing/opening
/dev/dsp will reset the volume back to 0 db gain/attenuation.
Setting this to 0 will preserve its settings across device
closing/opening.
- hw.snd.vpc_reset (default: 0). Panic/reset button to reset all
volume settings back to 0 db.
- hw.snd.vpc_0db (default: 45). 0 db relative to linear mixer value.
2 High quality fixed-point Bandlimited SINC sampling rate converter,
based on Julius O'Smith's Digital Audio Resampling -
http://ccrma.stanford.edu/~jos/resample/. It includes a filter design
script written in awk (the clumsiest joke I've ever written)
- 100% 32bit fixed-point, 64bit accumulator.
- Possibly among the fastest (if not fastest) of its kind.
- Resampling quality is tunable, either runtime or during kernel
compilation (FEEDER_RATE_PRESETS).
- Quality can be further customized during kernel compilation by
defining FEEDER_RATE_PRESETS in /etc/make.conf.
Kernel sysctls:
- hw.snd.feeder_rate_quality.
0 - Zero-order Hold (ZOH). Fastest, bad quality.
1 - Linear Interpolation (LINEAR). Slightly slower than ZOH,
better quality but still does not eliminate aliasing.
2 - (and above) - Sinc Interpolation(SINC). Best quality. SINC
quality always start from 2 and above.
Rough quality comparisons:
- http://people.freebsd.org/~ariff/z_comparison/
3 Bit-perfect mode. Bypasses all feeder/dsp effects. Pure sound will be
directly fed into the hardware.
4 Parametric (compile time) Software Equalizer (Bass/Treble mixer). Can
be customized by defining FEEDER_EQ_PRESETS in /etc/make.conf.
5 Transparent/Adaptive Virtual Channel. Now you don't have to disable
vchans in order to make digital format pass through. It also makes
vchans more dynamic by choosing a better format/rate among all the
concurrent streams, which means that dev.pcm.X.play.vchanformat/rate
becomes sort of optional.
6 Exclusive Stream, with special open() mode O_EXCL. This will "mute"
other concurrent vchan streams and only allow a single channel with
O_EXCL set to keep producing sound.
Other Changes:
* most feeder_* stuffs are compilable in userland. Let's not
speculate whether we should go all out for it (save that for
FreeBSD 16.0-RELEASE).
* kobj signature fixups, thanks to Andriy Gapon <avg@freebsd.org>
* pull out channel mixing logic out of vchan.c and create its own
feeder_mixer for world justice.
* various refactoring here and there, for good or bad.
* activation of few more OSSv4 ioctls() (see [1] above).
* opt_snd.h for possible compile time configuration:
(mostly for debugging purposes, don't try these at home)
SND_DEBUG
SND_DIAGNOSTIC
SND_FEEDER_MULTIFORMAT
SND_FEEDER_FULL_MULTIFORMAT
SND_FEEDER_RATE_HP
SND_PCM_64
SND_OLDSTEREO
Manual page updates are on the way.
Tested by: joel, Olivier SMEDTS <olivier at gid0 d org>, too many
unsung / unnamed heroes.
2009-06-07 19:12:08 +00:00
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return (ENOTSUP);
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2000-07-03 21:00:44 +00:00
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break;
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}
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return 0;
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}
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static moduledata_t snd_mod = {
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"snd_driver",
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snd_modevent,
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NULL
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};
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DECLARE_MODULE(snd_driver, snd_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
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MODULE_VERSION(snd_driver, 1);
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MODULE_DEPEND(snd_driver, snd_ad1816, 1, 1, 1);
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2001-04-23 21:53:12 +00:00
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MODULE_DEPEND(snd_driver, snd_als4000, 1, 1, 1);
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2005-11-27 03:29:59 +00:00
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MODULE_DEPEND(snd_driver, snd_atiixp, 1, 1, 1);
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2000-07-03 21:00:44 +00:00
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/* MODULE_DEPEND(snd_driver, snd_aureal, 1, 1, 1); */
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2001-03-19 00:26:41 +00:00
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MODULE_DEPEND(snd_driver, snd_cmi, 1, 1, 1);
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MODULE_DEPEND(snd_driver, snd_cs4281, 1, 1, 1);
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2000-07-03 21:00:44 +00:00
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MODULE_DEPEND(snd_driver, snd_csa, 1, 1, 1);
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MODULE_DEPEND(snd_driver, snd_csapcm, 1, 1, 1);
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MODULE_DEPEND(snd_driver, snd_ds1, 1, 1, 1);
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2006-07-15 20:22:40 +00:00
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MODULE_DEPEND(snd_driver, snd_emu10kx, 1, 1, 1);
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2006-06-17 17:01:41 +00:00
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MODULE_DEPEND(snd_driver, snd_envy24, 1, 1, 1);
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2006-10-01 14:57:34 +00:00
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MODULE_DEPEND(snd_driver, snd_envy24ht, 1, 1, 1);
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2000-07-03 21:00:44 +00:00
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MODULE_DEPEND(snd_driver, snd_es137x, 1, 1, 1);
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MODULE_DEPEND(snd_driver, snd_ess, 1, 1, 1);
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2001-07-01 19:38:58 +00:00
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MODULE_DEPEND(snd_driver, snd_fm801, 1, 1, 1);
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2000-07-03 21:00:44 +00:00
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MODULE_DEPEND(snd_driver, snd_gusc, 1, 1, 1);
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2006-10-01 11:18:56 +00:00
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MODULE_DEPEND(snd_driver, snd_hda, 1, 1, 1);
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2001-07-01 19:38:58 +00:00
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MODULE_DEPEND(snd_driver, snd_ich, 1, 1, 1);
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2000-09-23 17:35:37 +00:00
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MODULE_DEPEND(snd_driver, snd_maestro, 1, 1, 1);
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2001-02-01 20:29:16 +00:00
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MODULE_DEPEND(snd_driver, snd_maestro3, 1, 1, 1);
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2000-07-03 21:00:44 +00:00
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MODULE_DEPEND(snd_driver, snd_mss, 1, 1, 1);
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MODULE_DEPEND(snd_driver, snd_neomagic, 1, 1, 1);
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2000-11-01 00:53:16 +00:00
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MODULE_DEPEND(snd_driver, snd_sb16, 1, 1, 1);
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2006-01-23 11:58:01 +00:00
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MODULE_DEPEND(snd_driver, snd_sb8, 1, 1, 1);
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2000-07-03 21:00:44 +00:00
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MODULE_DEPEND(snd_driver, snd_sbc, 1, 1, 1);
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2000-08-09 20:28:19 +00:00
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MODULE_DEPEND(snd_driver, snd_solo, 1, 1, 1);
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2006-10-01 14:57:34 +00:00
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MODULE_DEPEND(snd_driver, snd_spicds, 1, 1, 1);
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2000-07-03 21:00:44 +00:00
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MODULE_DEPEND(snd_driver, snd_t4dwave, 1, 1, 1);
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2004-01-29 14:11:03 +00:00
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MODULE_DEPEND(snd_driver, snd_via8233, 1, 1, 1);
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2000-08-09 01:08:59 +00:00
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MODULE_DEPEND(snd_driver, snd_via82c686, 1, 1, 1);
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2001-03-19 00:26:41 +00:00
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MODULE_DEPEND(snd_driver, snd_vibes, 1, 1, 1);
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