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Colin Guthrie 1e7c4dd3e6 alsa-mixer: When setting hw volume, always round up with playback and down with capture. 
The previous logic in ade0a6f884
does not work with for input volumes.

This was discussed on the mailing list:

https://tango.0pointer.de/pipermail/pulseaudio-discuss/2011-May/010091.html

This approach can introduce a problem when setting the volumes
for sources. What follows is Tanu Kaskinen's analysis:

[quote]
I'll quote the log:

D: protocol-native.c: Client pavucontrol changes volume of source alsa_input.pci-0000_00_1b.0.analog-stereo.
D: alsa-source.c: Requested volume: 0:  45% 1:  45%
D: alsa-source.c:            in dB: 0: -20.71 dB 1: -20.71 dB
D: alsa-source.c: Got hardware volume: 0:  45% 1:  45%
D: alsa-source.c:               in dB: 0: -21.00 dB 1: -21.00 dB
D: alsa-source.c: Calculated software volume: 0: 101% 1: 101% (accurate-enough=no)
D: alsa-source.c:                      in dB: 0: 0.29 dB 1: 0.29 dB
D: source.c: Volume going up to 29273 at 270475970821
D: source.c: Volume change to 29273 at 270475970821 was written 34 usec late
D: alsa-source.c: Written HW volume did not match with the request: 0: 45% 1:  45% (request) != 0:  42% 1:  42%
D: alsa-source.c:                                            in dB: 0: -21.00 dB 1: -21.00 dB (request) != 0: -22.50 dB 1: -22.50 dB

Looking at the last line, the requested volume seems to hit exactly the
right step (-21.00dB), but for some reason Alsa decides to choose
something else. I'm pretty sure that this happens because of rounding
errors. In the first phase we ask Alsa what dB value we should set, and
it returns -21.00 dB. The value is given as a long int, but we convert
that to pa_cvolume. Then when we set the volume, we convert the
pa_cvolume value back to a long integer. At this point I believe it gets
converted to -2101. This is not visible in the debug message for some
reason - the rounding algorithm must be different from what was used
with the pa_cvolume -> long conversion.
[/quote]

The commit after this contains a patch that addresses this issue.
2011-06-22 22:45:27 +01:00
doxygen doxygen: generate documentation for format.h 2011-05-15 10:09:35 +05:30
m4 build-sys: Use AX_PTHREAD macro from autoconf archive 2011-06-21 15:12:17 +02:00
man build: Use silent rules for generating files 2011-03-11 11:49:43 +00:00
po i18n: Fix POTFILES 2011-05-15 14:31:22 +01:00
src alsa-mixer: When setting hw volume, always round up with playback and down with capture. 2011-06-22 22:45:27 +01:00
vala vala: More vala fixes 2011-04-18 10:31:51 +02:00
.gitignore .gitignore: add .tarball-version 2011-03-29 21:15:02 +01:00
.mailmap add a .mailmap file for git shortlog 2009-02-04 22:41:45 +01:00
autogen.sh remove remaining $ 2008-06-18 22:38:32 +02:00
bootstrap.sh Solaris: bootstrap portability 2009-08-22 00:58:53 +02:00
configure.ac capture: Add the passthrough format negotiation to capture streams. 2011-06-22 21:55:27 +01:00
git-version-gen build-sys: Include the .version file in the distribution tarball 2010-12-05 15:59:13 +00:00
GPL * rename "LICENSE" to "LGPL" 2006-04-20 12:33:00 +00:00
LGPL * rename "LICENSE" to "LGPL" 2006-04-20 12:33:00 +00:00
libpulse-browse.pc.in version: Drop the micro version number 2010-11-28 15:56:20 +00:00
libpulse-mainloop-glib.pc.in version: Drop the micro version number 2010-11-28 15:56:20 +00:00
libpulse-simple.pc.in version: Drop the micro version number 2010-11-28 15:56:20 +00:00
libpulse.pc.in version: Drop the micro version number 2010-11-28 15:56:20 +00:00
LICENSE echo-cancel: Add alternative echo-cancellation implementation 2010-09-07 15:12:12 +05:30
Makefile.am vala: Fix path error in the last commit. 2011-03-26 12:42:43 +00:00
orc.mak build: Simplify Orc-related make rules 2011-02-01 11:51:46 +05:30
PROTOCOL introspect: Get format of source output 2011-06-22 22:45:27 +01:00
pulseaudio-text.svg merge 'lennart' branch back into trunk. 2007-10-28 19:13:50 +00:00
pulseaudio.svg Add PulseAudio logo to tree. 2006-08-28 06:25:41 +00:00
README Add a small README with the new git URLs and stuff 2008-06-18 00:34:14 +02:00
todo remove remaining $ 2008-06-18 22:38:32 +02:00

README 

PULSEAUDIO SOUND SERVER

WEB SITE:
	http://pulseaudio.org/

GIT:
	git://git.0pointer.de/pulseaudio.git

GITWEB:
	http://git.0pointer.de/?p=pulseaudio.git;a=summary

MAILING LIST:
	https://tango.0pointer.de/mailman/listinfo/pulseaudio-discuss

GIT COMMITS MAILING LIST:
	https://tango.0pointer.de/mailman/listinfo/pulseaudio-commits

TRAC TICKET CHANGES MAILING LIST:
	https://tango.0pointer.de/mailman/listinfo/pulseaudio-tickets

IRC:
	#pulseaudio on irc.freenode.org

CIA:
	http://cia.navi.cx/stats/project/polypaudio

FRESHMEAT:
	http://freshmeat.net/projects/pulseaudio/

OHLOH:
	http://www.ohloh.net/projects/4038

AUTHORS:
	Several