Parse PCM configurations and capabilities. These can then be used to define
the capabilities and config for FE DAI links, PCM devices and
codec <-> codec style links.
The topology core parses the high level topology file and calls the
individual object parsers when any new object element is detected at
the high level.
We copied include/list.h from Linux kernel, and it's of course in
GPLv2. This has raised concerns to many people, as it's not clear
whether such a code is considered to be completely trivial, thus it
might be seen as a derivative work, which takes effect in GPL, as
suggested by Clemens.
For clearing the situation, this patch replaces the existing list.h
implementation from a new version. The API is kept to be compatible,
but the codes were written from full scratch under LGPL, to be aligned
with other alsa-lib codes.
Reported-by: Clemens Lang <clemens.lang@bmw-carit.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Martin Geier [Fri, 24 Jul 2015 07:30:57 +0000 (09:30 +0200)]
pcm: restore hw params on set latency failed
When method snd_pcm_set_params sets sample rate to 22050 and latency to 50000
to davinci soc driver method snd_pcm_hw_params_set_buffer_time_near fails
and variable params is already changed in the method so the next method
snd_pcm_hw_params_set_period_time_near fails also.
Signed-off-by: Martin Geier <martin.geier@streamunlimited.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
surround41/50.conf: Use chmap syntax for better flexibility
In case the hardware only supports a specific channel map,
this change would allow surround41/50 to select the correct
channel map and channel count in this situation.
Signed-off-by: David Henningsson <david.henningsson@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Shengjiu Wang [Fri, 12 Jun 2015 08:15:08 +0000 (16:15 +0800)]
PCM: snd_pcm_xxxx_drain() maybe blocked after suspend and resume
After suspend and resume, the alsa driver is stopped. But if alsa-lib run
into snd_pcm_xxxx_drain(), it need to wait avail >= pcm->stop_threshold,
otherwise, it will not exit the loop, so finally it is blocked at poll() of
snd_pcm_wait_nocheck(pcm, -1).
This patch is to add state check after snd_pcm_wait_nocheck(pcm, -1), if
the state is SND_PCM_STATE_SUSPENDED, then return error.
Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Wed, 10 Jun 2015 09:56:23 +0000 (11:56 +0200)]
control: Allow cset'ing specific values in the multi-value case
Improve the parser to allow empty elements followed by a comma.
Now amixer works like below for setting only the third element.
% amixer cset 'IIR1 Band1' ,,200
Takashi Iwai [Tue, 2 Jun 2015 14:47:50 +0000 (16:47 +0200)]
pcm: Fix snd_pcm_status() for dmix & co
Fetch the timestamp and other status fields by issuing
snd_pcm_status() for the slave PCM. Also, fill the delay field
properly. This should fix longstanding PA's complaints.
Reported-by: Dan Hordern <danhordern@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Thu, 21 May 2015 05:26:39 +0000 (07:26 +0200)]
pcm: Remove assert() from snd_pcm_hw_params_slave()
Using assert() for non-fatal error checks is really brain-dead.
These are especially bad, as it hits even in the normal operation with
plugins and some h/w constraints.
Reported-by: Alan Horstmann <gineera@aspect135.co.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Like pcm and rawmidi, each object parser needs to accept the hint
component. Now a new local function _snd_conf_generic_id() was
introduced to replace each call of "comment" and "type" field checks.
Also, the two existing identical functions for pcm and rawmidi are
removed and the new function is used commonly.
Due to the uninitialized field before the error path, passing an
invalid iface argument may result in a bad free() call. Initialize
the fields properly beforehand.
The current code of snd_device_name_hint() has a bug when listing up
devices without the device index (e.g. ctl). Because it assigns the
default device index 0 unconditionally and it has a check at the later
point to filter entries with dev >= 0, it ended up with empty
outputs.
The fix is simply to remove the bogus assignment of dev = 0.
namehint: Fix invalid list access in snd_device_name_hint()
snd_device_name_hint() tries to free the allocated list at the error
path via snd_device_name_free_hint(). But snd_device_name_free_hint()
expects a list terminated by NULL while snd_device_name_hint() doesn't
add it. Adding it may again result in an error and thus isn't
guaranteed to work. Hence we can't add NULL at the error path.
Instead, now the code always allocates one entry more, and zero-clears
the newly allocated beforehand to guarantee the NULL termination.
Tanu Kaskinen [Thu, 5 Mar 2015 12:51:57 +0000 (14:51 +0200)]
ucm: reformat snd_use_case_get() doc
Doxygen doesn't preserve formatting that relies only on indentation.
This fixes it by using lists more liberally.
There are probably more places to fix than just
snd_use_case_get_list(), but I only have motivation for fixing this
function's documentation formatting (the next patch will add some more
content to the function's documentation).
Tanu Kaskinen [Tue, 17 Feb 2015 19:15:23 +0000 (21:15 +0200)]
ucm: fix some variable constness issues
I submitted earlier a patch that made the value parameter of
snd_use_case_get() non-const, but as that changed the public API, the
patch couldn't be accepted. This is the same patch, modifying the
internal code so that there are fewer issues with constness, but the
public API is left alone (a comment was added to the function
documentation, though, so that hopefully nobody else will try to fix
the same unfixable problem).
Tanu Kaskinen [Tue, 17 Feb 2015 19:15:22 +0000 (21:15 +0200)]
ucm: fix the logic of choosing the default cdev
If the cdev has not been configured explicitly, use the PlaybackCTL
or CaptureCTL value if one of them is set. If neither are set, or if
both are set to different values, then there's no sensible default, so
executing the sequence should fail. The previous code probably tried
to implement this logic, but it was buggy.
Also use more descriptive variable names than "cdev1" and "cdev2".
Tanu Kaskinen [Tue, 10 Feb 2015 20:42:32 +0000 (22:42 +0200)]
ucm: fix variable mixup
I assume the intention was to use cdev1 for PlaybackCTL and cdev2 for
CaptureCTL, but cdev1 was being used for both and cdev2 was not used
for anything.
This patch resulted from discussion with redlion_ on #alsa IRC channel
on Freenode. 4-channel playback now works. 4-channel capture works too,
but not simultaneously with playback (hardware limitation).
Takashi Iwai [Wed, 28 Jan 2015 15:21:14 +0000 (16:21 +0100)]
Remove unused hostname resolution in shm plugins and aserver
PCM and control shm plugins and aserver have some codes to resolve the
host address and check whether it's a local host although the given
address is never used. In addition, the code contains gethostbyname()
that is known to be obsoleted. So, let's get rid of all these unused
codes.
The host configuration item is still accepted (but just ignored) for
keeping the compatibility.
Lu, Han [Thu, 22 Jan 2015 01:32:47 +0000 (09:32 +0800)]
ucm: add binary configure file parse
with cset command, UCM set kcontrol parameters directly:
cset "name='<KCONTROL_NAME>' 1<,2,3,...>"
This patch enables UCM to set kcontrol with parameters from
configure file:
cset-bin-file "name='<KCONTROL_NAME>' <path/to/file>"
where "cset-bin-file" is a newly added keyword alongside of "cset",
to indicate cset with binary data in file.
The binary data in file is parameter for audio DSPs, and it's just
passed by UCM/ALSA as raw data. The data type of parameter elements
must be byte, and the count must matches driver definition.
Signed-off-by: Lu, Han <han.lu@intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tomeu Vizoso [Thu, 15 Jan 2015 16:27:29 +0000 (17:27 +0100)]
conf/ucm: GoogleNyan: Add configuration
Taken from the ChromeOS sources, this configuration should apply to all
Nyan boards from Google, so far HP Chromebook 14 (nyan-blaze) and Acer
Chromebook 13 (nyan-big).
Anssi Hannula [Tue, 30 Dec 2014 18:46:11 +0000 (20:46 +0200)]
pcm: fix buffer overflow in snd_pcm_chmap_print()
The size argument is wrong for one of the snprintf() calls in
snd_pcm_chmap_print(), allowing an overflow to happen (the user-provided
buffer may be written data up to 2x its actual size).
Seen in an user report here: http://trac.kodi.tv/ticket/15641
Takashi Sakamoto [Fri, 28 Nov 2014 16:03:34 +0000 (01:03 +0900)]
hwdep: add OXFW driver support
Linux 3.19 newly support this driver. By hardware dependent interface,
userspace applications can get hardware information, lock/unlock kernel
streaming and receive lock status event.
Tim Cussins [Tue, 25 Nov 2014 14:44:54 +0000 (14:44 +0000)]
pcm: Fix assorted tstamp_type bugs/omissions.
Just a couple of quick fixes related to tstamp_type.
- snd_pcm_sw_params(): copy tstamp_type field
- snd_pcm_tstamp_type_name(): fix argument type
- snd_pcm_dump_sw_setup(): fix dumping of tstamp_type field
John Spencer [Sat, 15 Nov 2014 12:41:00 +0000 (13:41 +0100)]
snd_dlsym: only do versioning checks if built --with-versioning
a combination of some of the following garbage collecting LD/CFLAGS
-Os -g0 -fdata-sections -ffunction-sections -s -Wl,--gc-sections
-fno-unwind-tables -fno-asynchronous-unwind-tables
causes the symbol versioning marker symbols to be removed from BSS
since they're otherwise unreferenced. this causes dlsym failing to
find them which results in runtime breakage:
$ alsamixer
ALSA lib dlmisc.c:142:(snd_dlsym_verify) unable to verify version for symbol snd_config_hook_load
ALSA lib conf.c:3328:(snd_config_hooks_call) symbol snd_config_hook_load is not defined inside (null)
ALSA lib conf.c:3788:(snd_config_update_r) hooks failed, removing configuration
cannot open mixer: No such device or address
correct DSO:
$ objdump -T libasound.so.2.strip | grep _snd_config_hook_load_dlsym_config_hook_001 001196bc g DO .bss 00000001 _snd_config_hook_load_dlsym_config_hook_001
incorrect DSO:
$ objdump -T libs/libasound.so.2 | grep _snd_config_hook_load_dlsym_config_hook_001 00000000 g DO *ABS* 00000001 _snd_config_hook_load_dlsym_config_hook_001
since alsa was built with --without-versioning, doing those versioning
checks at all is unnecessary and harmful and thus now disabled in this case.
Signed-off-by: John Spencer <maillist-alsa@barfooze.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Takashi Iwai [Thu, 6 Nov 2014 11:12:02 +0000 (12:12 +0100)]
pcm: dmix: Don't ignore SND_TIMER_EVENT_MSTOP
When a slave PCM gets an error like XRUN, it stops and notifies with
SND_TIMER_EVENT_MSTOP event. But the current code filters out this
type and eventually hang due to the empty timer queue. The fix is to
just add this event type to the filter bit mask.
hwdep: add missing declaration for snd_hwdep_poll_descriptors_count()
The alsa-lib has 'snd_hwdep_poll_descriptors_count()' but hwdep.h has no
declaration for the function. No applications can call the function just
by including the header.
This commit adds a line to the file for this function.
pcm: rewindable, forwardable: don't return stale data
The current behavior of snd_pcm_rewindable and snd_pcm_forwardable means
that the returned value is only accurate to one period. Or maybe even
meaningless if period interrupts are off. Fetch the up-to-date position
of the hardware pointer, as that's what is wanted by callers.
Signed-off-by: Alexander E. Patrakov <patrakov@gmail.com> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
pcm: handle negative values from snd_pcm_mmap_hw_avail
Such negative values can happen when an underrun happens and xrun
detection is disabled. Another situation is if the device updated the
pointer before alsa-lib has a chance to detect the xrun.
The problem is that these negative values could propagate to the
snd_pcm_rewindable return value, where it is specified that negative
returns must be interpreted as error codes and not as negative amount of
samples.
Signed-off-by: Alexander E. Patrakov <patrakov@gmail.com> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
git://git.alsa-project.org / alsa-lib.git / log