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The Advanced Linux Sound Architecture (ALSA) - library
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Adam Miartus e520f45480 pcm: add mmap_begin callback to snd_pcm_fast_ops_t api 
main motivation for adding the callback is to use it to enable operation
on mmaped buffer before user access for pcm_file plugin

support for MMAP read access with masking by data from input file is not
implemented for pcm_file plugin, by adding this callback implementing
such feature can be done by rewriting next continuous portion of buffer
on each mmap_begin call

plugins like softvol use pcm_plugin interface and overwrite the buffer by
looping around it in avail_update callback, this patch hopes to simplify
the task by adding new api callback, removing the need for rewriting
pcm_file (to use pcm_plugin callbacks) and careful checking when looping
around whole mmaped buffer

Signed-off-by: Adam Miartus <amiartus@de.adit-jv.com>
Reviewed-by: Timo Wischer <twischer@de.adit-jv.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-05-24 11:06:44 +02:00
alsalisp Change FSF address (Franklin Street) 2017-11-14 14:29:26 +01:00
aserver a set of fixes to reduce gcc warnings 2018-03-27 15:16:41 +02:00
doc doxygen: Suppress timestamp 2016-06-23 16:29:07 +02:00
include add support for GCC's LTO 2019-04-09 12:44:14 +02:00
m4 Add the attributes.m4 macro file from xine/lscube. 2008-11-21 13:04:19 +01:00
modules modules: smixer_python - add support for python3 2018-03-27 14:51:39 +02:00
src pcm: add mmap_begin callback to snd_pcm_fast_ops_t api 2019-05-24 11:06:44 +02:00
test Printf unsigned longs with %lu instead of %ld (playmidi1.c) 2019-04-09 10:27:36 +02:00
utils Drop -I$includedir/alsa from alsa.pc 2019-03-28 08:01:34 +01:00
.gitignore initial version of .travis.yml file 2018-10-24 16:07:58 +02:00
.travis.yml initial version of .travis.yml file 2018-10-24 16:07:58 +02:00
acinclude.m4 fixed for the recent autoconf. 2004-01-26 15:52:17 +00:00
ChangeLog * update to libtool 1.3.3 1999-07-22 12:18:42 +00:00
configure.ac ucm: Add UCM profile for CX2072X codec on Baytrail/Cherrytrail profiles 2019-05-23 17:42:42 +02:00
COPYING Change FSF address (Franklin Street) 2017-11-14 14:29:26 +01:00
gitcompile add support for GCC's LTO 2019-04-09 12:44:14 +02:00
INSTALL pcm: Add thread-safety to PCM API 2016-07-11 15:25:30 +02:00
Makefile.am autotools: update style 2014-02-26 08:16:22 +01:00
MEMORY-LEAK Initial version 2003-02-04 14:56:07 +00:00
NOTES Change assert condition in error message handler 2007-10-24 12:53:08 +02:00
README.md README.md: add link to www.alsa-project.org 2018-10-24 17:33:10 +02:00
TODO Added snd_config_load_override(). 2002-01-09 21:28:15 +00:00

README.md

alsa-lib

Advanced Linux Sound Architecture (ALSA) project

The alsa-lib is a library to interface with ALSA in the Linux kernel and virtual devices using a plugin system.

The up-to-date reference generated from sources can be accessed here:

http://www.alsa-project.org/alsa-doc/alsa-lib/

You may give a look for more information about the ALSA project to URL http://www.alsa-project.org.