When If.Condition is a string type instead of compound, parse it using
snd_config_load_string with variable substitution support for syntax v9+.
This allows more flexible condition definitions using variable references.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Refactor if_eval_string() to eliminate code duplication by introducing
a compare_strings() helper function that handles the common pattern of
retrieving, substituting, and comparing string pairs.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Adds support for integer comparison operations in If.Condition blocks.
Supports operators: ==, !=, <, >, <=, >= for comparing integer values.
Both values are substituted and converted from strings to 64-bit integers.
Hexadecimal (C like) strings are also accepted (like 0x1234).
Example usage:
If.check_channels {
Condition {
Type Integer
Operation ">"
Value1 "${var:channels}"
Value2 "2"
}
True { ... }
}
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It is useful to substitute the variable names and string
macro arguments. It may simplify the UCM configurations.
E.g.:
Define."${var:Name} Suffix" "Value"
Macro.a.DoIt "Channels=${var:PlaybackChannels}"
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
The path name substituted file contents and normal file contents
should be handled similary. Use correct function determining
the right base directory name.
Fixes: 8f5779eb ("ucm: add LibraryConfig support")
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
closefrom is a library function with a fallback mechanism for when the
kernel does not support the close_range syscall.
Also check for the function properly instead of assuming it is available
with _GNU_SOURCE defined.
Closes: https://github.com/alsa-project/alsa-lib/pull/486
Fixes: https://github.com/alsa-project/alsa-lib/issues/485
Signed-off-by: Mike Gilbert <floppym@gentoo.org>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
BootCardGroup and BootCardSyncTime variables should not be listed
by default in _identifiers. Handle them differently using
ValueGlobals section.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Modify verb_dev_list_check() to ensure all devices in a conflicting or
supported group reference each other. Previously, the function only
ensured bidirectional relationships. Now it ensures all devices in
the same group have complete dependency lists.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
We need a boot synchronization for multiple UCM cards where linking
is expected like AMD ACP or Intel AVS drivers. This method is
using a timestamp file which can be created and modified during
the boot process (e.g. from the alsactl tool).
The goal is to return a valid UCM configuration for standard
applications combining multiple ALSA cards into one UCM configuration
and cover the time window when all cards have not been probed yet.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It is necessary to reset the state logic before each verb variant
is parsed. So save the original variable list and macros and
restore them before each parser iteration.
BugLink: https://github.com/alsa-project/alsa-ucm-conf/pull/633
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It seems that version checking is more complicated:
Syntax is one-way settlement from the configuration files.
It cannot be conditional.
The library version string is hard to check with regex.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It may be useful to check the current syntax version (and maybe
library version) when new features are added.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
It may be useful to check additional sysfs parameters like USB descriptors
to determine the exact hardware capabilities.
Introduce 'sys-card' substitution and 'sys' substitution to allow data
fetching from given range. Also, add conversion to hexadecimal format
when the source file has binary contents.
Example - fetch bytes from positions 0x10..0x15 (6 bytes):
Define.Bytes1 "${sys-card:[type=hex,pos=0x10,size=6]device/../descriptors}"
Example - fetch one byte from position 0x22:
Define.Bytes2 "${sys-card:[type=hex,pos=0x22]device/../descriptors}"
Replace type=hex or omit this variable settings to work with ASCII
characters.
Link: https://github.com/alsa-project/alsa-ucm-conf/issues/444
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Use the appropriate variable for access/eaccess call.
Fixes: https://github.com/alsa-project/alsa-lib/issues/395
Fixes: ef6463a2 ("ucm: fix Path condition - substitute Path and Mode fields")
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
