delta/alsa-lib.git/src/timer, branch master

timer: remove dead code in _snd_timer_hw_open()

2021-06-02T17:50:17+00:00

ucm: add LibraryConfig support

2021-04-13T15:14:28+00:00

This commit allows to define private alsa-lib's configuration. When
the configuration is present, the device values ("PlaybackCTL",
"CaptureCTL", "PlaybackMixer", "CaptureMixer", "CapturePCM")
are prefixed with '_ucmHEXA.' string where HEXA is replaced by the
unique hexadecimal number identifying the opened ucm manager handle.

    Syntax 4

    LibraryConfig.a_label.SubstiConfig {
            # substituted library configuration like:
            usr_share_dir "${ConfLibDir}"
    }

    LibraryConfig.b_label.Config {
            # non-substituted library configuration like:
            usr_share_dir "/usr/share/alsa"
    }

    The File counterparts:

    LibraryConfig.c_label.SubstiFile "/some/path"
    LibraryConfig.d_label.File "/some/path"

Note that for files the contents is substituted on the request,
but the file name is always substituted (useful for ${ConfDir} etc.).

The private configuration is not saved or preserved. It's life time
belongs to the opened ucm manager handle.

Signed-off-by: Jaroslav Kysela

conf: introduce snd_config_get_card() function

2021-02-26T20:08:28+00:00

It's helper for the "card" entries parsing. It reduces
the code in most of open_hw functions.

Signed-off-by: Jaroslav Kysela

timer: fix sizeof operator mismatch in snd_timer_query_hw_open

2020-12-27T08:27:04+00:00

Signed-off-by: Alex Henrie 
Signed-off-by: Takashi Iwai

add support for GCC's LTO

2019-04-09T10:44:14+00:00

core: Proper reference of internal snd_dlopen()

2018-01-04T14:29:57+00:00

snd_dlopen() was recently rewritten to be versioned symbols, and we
have to call it with INTERNAL() wrapper from the library itself.

Add the proper declaration in the local header and fix the callers
appropriately.

Signed-off-by: Takashi Iwai

timer: Proper reference of internal versioned symbols

2018-01-04T14:29:22+00:00

The multiply defined versioned symbols have to be called with
INTERNAL() wrapper.

Add the missing declarations of versioned timer API functions in the
local header, and use them in the callers in PCM.

Signed-off-by: Takashi Iwai

Change snd_dlopen() function to return the error string

2017-11-27T20:48:20+00:00

The dlopen() function might fail also for another reason than
a missing file, thus return the error string from dlerror().

Signed-off-by: Jaroslav Kysela

Change FSF address (Franklin Street)

2017-11-14T13:29:26+00:00

Signed-off-by: Jaroslav Kysela

conf: Add thread-safe global tree reference

2016-05-17T13:51:20+00:00

Most of open functions in alsa-lib have the call pattern:
  snd_config_update();
  return snd_xxx_open(x, snd_config, ...);

This means that the toplevel config gets updated, and passed to a
local open function.  Although snd_config_update() itself has a
pthread mutex to be thread safe, the whole procedure above isn't
thread safe.  Namely, the global snd_config tree may be deleted and
recreated at any time while the open function is being processed.
This may lead to a data corruption and crash of the program.

For avoiding the corruption, this patch introduces a refcount to
config tree object.  A few new helper functions are introduced as
well:
- snd_config_update_ref() does update and take the refcount of the
  toplevel tree.   The obtained config tree has to be freed via
  snd_config_unref() below.
- snd_config_ref() and snd_config_unref() manage the refcount of the
  config object.  The latter eventually deletes the object when all
  references are gone.

Along with these additions, the caller of snd_config_update() and
snd_config global tree in alsa-lib are replaced with the new helpers.

Signed-off-by: Takashi Iwai