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296373 |
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04-Mar-2016 |
marius |
- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1 builds. - Update newvers.sh to reflect RC1. - Update __FreeBSD_version to reflect 10.3. - Update default pkg(8) configuration to use the quarterly branch.
Approved by: re (implicit) |
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256281 |
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10-Oct-2013 |
gjb |
Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.
Approved by: re (implicit) Sponsored by: The FreeBSD Foundation
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193640 |
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07-Jun-2009 |
ariff |
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.
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#
167644 |
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16-Mar-2007 |
ariff |
[stage: 4/9]
- Rearrange FEEDER_* constants starting from 0 to 31, so the future additions will be much easier and consistent. - Introduce FEEDER_SWAPLR. Few super broken hardwares (found on several extremely cheap uaudio stick, possibly others) mistakenly wired left and right channels wrongly, screwing output or input.
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#
164614 |
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26-Nov-2006 |
ariff |
Welcome to Once-a-year Sound Mega-Commit. Enjoy numerous updates and fixes 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.
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154684 |
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22-Jan-2006 |
ariff |
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
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#
139749 |
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06-Jan-2005 |
imp |
Start each of the license/copyright comments with /*-, minor shuffle of lines
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#
119853 |
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07-Sep-2003 |
cg |
update my email address.
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#
118473 |
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05-Aug-2003 |
dds |
Change gcc-specific aggregate initialization member specifiers into C9X initializer designators.
Reviewed by: schweikh (mentor) MFC after: 4 weeks
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117307 |
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07-Jul-2003 |
cg |
* add a function to display a complete feeder chain on the console, for debugging.
* set the parent of non-format feeders, so that sndstat doesn't miss out things like feeder_rate.
MFC: 1 week
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#
89834 |
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26-Jan-2002 |
cg |
* improve error handling * be more specific in verbose boot messages * allow the feeder subsystem to veto pcm* attaching if there is an error initialising the root feeder * don't free/malloc a new tmpbuf when resizing a snd_dbuf to the same size as it currently is * store the feeder description in the feeder structure instead of mallocing space for it
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#
89686 |
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23-Jan-2002 |
cg |
make the feederchain builder work for recording. this has not been tested extensively as none of my testboxes have speakers or an audio source at present, but the chains built look correct and reading /dev/audio (ulaw, translated from signed 16 bit little-endian) gives values within the expected range for silence.
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#
77266 |
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27-May-2001 |
cg |
add a new method for retrieving feeder parameters
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#
75319 |
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08-Apr-2001 |
cg |
minor tweaks in speed and format setting routines.
don't stop exploring the feeders if a feeder fails to initialise.
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#
74763 |
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24-Mar-2001 |
cg |
mega-commit.
this introduces a new buffering mechanism which results in dramatic simplification of the channel manager.
as several structures have changed, we take the opportunity to move their definitions into the source files where they are used, make them private and de-typedef them.
the sound drivers are updated to use snd_setup_intr instead of bus_setup_intr, and to comply with the de-typedefed structures.
the ac97, mixer and channel layers have been updated with finegrained locking, as have some drivers- not all though. the rest will follow soon.
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#
70134 |
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18-Dec-2000 |
cg |
kobjify.
this gives us several benefits, including:
* easier extensibility- new optional methods can be added to ac97/mixer/channel classes without having to fixup every driver.
* forward compatibility for drivers, provided no new mandatory methods are added.
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#
66308 |
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23-Sep-2000 |
cg |
prepare for adding a rate conversion feeder.
move format conversion feeders to feeder_fmt.c - no pertinent history so no repo-copy.
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#
64881 |
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20-Aug-2000 |
cg |
rework feeder sytem to allow feeders in klds
modify driver capability reporting format to list every audio format seperately- required for above and because we could not previously indicate that mono was unsupported.
there should be no functional impact.
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