alsaloop allows create a PCM loopback between a PCM capture device
and a PCM playback device.
alsaloop supports multiple soundcards, adaptive clock synchronization,
adaptive rate resampling using the samplerate library (if available in
the system). Also, mixer controls can be redirected from one card to
another (for example Master and PCM).
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
The inactive controls are stored, but they are not restored
when they are marked inactive in the state file or in the
driver.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
alsaucm is a command line tool that can be used to generate and debug UCM
configuration files. The alsaucm utility can fully use the UCM functionality
to query and configure all the UCM functionality in alsa-lib.
This work was sponsored by Slimlogic Ltd, Texas Instruments Inc and Wolfson
Microelectronics PLC.
CC: Ian Molton <ian@mnementh.co.uk>
CC: Graeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: Justin Xu <justinx@slimlogic.co.uk>
Signed-off-by: Stefan Schmidt <stefan@slimlogic.co.uk>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
The term_c_lflag variable might be unitialized in some cases. Add extra
check to avoid setting of wrong value.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Make the comment node a separate node in the state file (join=0), and
move it after the other fields of the respective control.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
When the range of a control has changed between driver versions, it is a
good idea to restore the same dB value of the control. However,
computing the dB value by interpolating betweem the min/max dB values
duplicates alsa-lib's TLV functions and does not even work for controls
with a linear dB range.
A simple conversion to dB and back can be done if we add the dB value(s)
to the saved state.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Reserving new space from the stack in every loop iteration is not
necessary, so move the call to snd_ctl_elem_id_alloca outside where it
is executed only once.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
To save a call to snd_config_set_xxx, replace the calls to
snd_config_make_xxx with snd_config_imake_xxx.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Also, make the initialization & restore logic for one card similar to
multiple card initialization & restore.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Ensure that control volume values are in their allowed range; otherwise,
the displayed values could be outside the range 0..100 and mess up the
layout.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
The attempt to divide by max-min fails if a control has only one valid
value. In this case, adjust the maximum so that the computation can
succeed; the control will look like 0%.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
When an element is marked as not readble, do not try to read it and then
complain about the error, but just ignore it.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Rewrite the port listing code because it was too complex and had some
bugs when handling write-only or read-only ports.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Bring the man file up to date, documenting the signals and all the
options, including those added for audio surveilance.
Signed-off-by: John Sauter <John_Sauter@systemeyescomputerstore.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Add signal SIGUSR1 to turn over the output file,
--max-file-time to cause the output file to turn over automatically,
and --use-strftime to create output files based on the current time.
Signed-off-by: John Sauter <John_Sauter@systemeyescomputerstore.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Write the process ID to a file so other programs can
signal aplay. When aplay exits, delete the file.
Signed-off-by: John Sauter <John_Sauter@systemeyescomputerstore.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
If initialization file (-i option) does not exists, the free_space()
function was called with NULL pointer.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Report available sample formats in aplay/arecord when currently selected
one doesn't work.
Signed-off-by: Arnout Engelen <alsa2@bzzt.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
To increase configuration readability, add CTL{do_search} and CTL{do_count}
actions. The old PROGRAM=="__ctl_search" notion is also allowed.
Add CTL{write} to XML documentation.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
