Detailed changes v1.1.3 v1.1.4

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Detailed changelog between 1.1.1 and 1.1.4 releases

Changelog between 1.1.3 and 1.1.4 releases

alsa-plugins

Core

- Release v1.1.4
- configure: Fix detection of avcodec.h
- configure: enhancing configuration support for alsa plugins
Following plugins are made configurable in alsa-plugins:
* oss
* mix
* usbstream
* arcamav
* speexdsp

Detailed changelog between 1.1.3 and 1.1.4 releases

Changelog between 1.1.3 and 1.1.4 releases

alsa-lib

Core

- Release v1.1.4
- Drop ppc64-specific workaround for versioned symbols
Currently aserver fails to build when using parameter
--without-versioned, due to an workaround for ppc64
(06221f86d207cb33ddd4867ca5301eeb247c4400). This workaround is
not required anymore on the ppc64 ABI v2, and, in fact is breaking the
compilation. Reverting this commit
- conf/ucm: broxton: add broxton-rt298 conf files
This adds the UCM conf files for broxton enabling with rt298 codec on
I2S audio, HDMI and DMIC ports.

Config API

- conf: Allow dynamic top-level config directory
Currently the top-level config directory is specified only via
configure script option, and is fixed after that. It's inconvenient
when the library is moved to another base directory, or if you want to
use a library code (e.g. with $LD_PRELOAD) with the incompatible
config setups.
This patch allows user to override the top-level config path via the
environment varialbe, $ALSA_CONFIG_DIR. For that, a new helper
function, snd_config_topdir(), was introduced, and the codes referring
to the top config dir have been modified to handle it dynamically.

HWDEP API

- hwdep: add support for MOTU FireWire series and RME Fireface series
Drivers for MOTU FireWire series and RME Fireface series were newly added
to v4.12 kernel. Like the other drivers in ALSA firewire stack, they also
support HwDep interface.
This commit add entries for the drivers.
- hwdep: add Line6 USB series support
Drivers for Line6 USB series was firstly added to staging directory at
development period of v2.6.30 kernel. At v4.9 kernel development, they
were moved to sound directory. The drivers include HwDep interface, while
header in user space library has never been updated for an entry
corresponding to the drivers.
This commit adds the entry.

Mixer API

- conf: Allow dynamic top-level config directory
Currently the top-level config directory is specified only via
configure script option, and is fixed after that. It's inconvenient
when the library is moved to another base directory, or if you want to
use a library code (e.g. with $LD_PRELOAD) with the incompatible
config setups.
This patch allows user to override the top-level config path via the
environment varialbe, $ALSA_CONFIG_DIR. For that, a new helper
function, snd_config_topdir(), was introduced, and the codes referring
to the top config dir have been modified to handle it dynamically.

PCM API

- ALSA: pcm: Use recursive mutex
The recent thread-safety pthread implementation caused deadlocks in
some situations, e.g. when an external plugin calls snd_pcm_state() in
its callback. One can avoid the deadlock by carefully using the
unlocked version, but it's often error-prone, and it might be still
problem with the old binaries.
In this patch, we initialize the pthread mutex as recursive for fixing
such a problem.
Suggested-by: Timo Wischer <twischer@de.adit-jv.com>
- pcm: dmix: Disable var_periodsize as default
The recently added variable period-size feature for dmix & co seems
causing a regression on some old applications; e.g. Audacious aborts
with an error:
ALSA error: snd_pcm_hw_params_set_buffer_time_near failed: Invalid argument.
As a quick fix, disable the feature as default. One can still enable
it via asoundrc.
Bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=1033179
- pcm:plugin: Fix sound capture via MMAP access
Distorted sound is heard if the capture device of an ioplug plugin is used,
which is accessed through any ALSA plugin (like copy, linear, ...) via MMAP access.
E.g. aplay -> loop -> copy -> arecord -M -> aplay -> hw:0
As mentioned in the ALSA API (see pcm/pcm.c:942):
The function #snd_pcm_avail_update() have to be called
before any mmap begin+commit operation.
- plugin:dshare: wrong state reporting
If plugin dshare detects underrun, it reports this to the user
via return value -EPIPE and setting dshare state to 'xrun' which is correct.
But, if user after this wants to check the stream state, it is misleadingly
reported as 'running' instead of 'xrun'.
With this behavior aplay e.g. will not do a proper underrun handling
(restarting stream) but terminates streaming.
This is due to plugin dshare always returns state of the slave pcm,
in pcm_ops->state() which is not correct.
- pcm:file: delegate htimestamping to slave instead of always getting real_htimestamp
purpose of this fix, is to read most accurate timestamps.
From documentation of /src/pcm/pcm.c, we can see:
"""" \par Timestamp mode
The timestamp mode specifies, if timestamps are activated. Currently, only #SND_PCM_TSTAMP_NONE and #SND_PCM_TSTAMP_MMAP modes are known.
The mmap mode means that timestamp is taken on every period time boundary. Corresponding position in the ring buffer assigned to timestamp can be obtained using #snd_pcm_htimestamp() function. """"
As snd_pcm_generic_htimestamp() internally calls snd_pcm_htimestamp() to read time, so accurate timestamp can be read from snd_pcm_generic_htimestamp().
Also, in case of pcm_file, if the underlying slave is hardware, then we would wish to read elapsed hardware time, as it will be the most accurate, as opposed to the elapsed wall time.
This will provide pcm_file with the most accurate timestamps.
Following are the timesamps read with timestamp enabled, for with fix and without fix scenarios:
1> With fix:
 :~#time aplay --enable-tstamp -Dhtstamp_test --period-time=5000 -v -fdat /dev/urandom
Playing raw data '/dev/urandom' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
File PCM (file=/tmp/swarate_out.wav)
Final file PCM (file=/tmp/swarate_out.wav)
..
Slave: Hardware PCM card 0 'imx6q-sabresd-wm8962' device 0 subdevice 0
Its setup is:
stream  : PLAYBACK
access  : RW_INTERLEAVED
format  : S16_LE
subformat  : STD
channels  : 2
rate  : 48000
exact rate  : 48000 (48000/1)
msbits  : 16
buffer_size  : 24000
period_size  : 240
period_time  : 5000
tstamp_mode  : ENABLE
.
.
Before sleep = 142:409.807623
After sleep = 142:409.807623
Before sleep = 142:414.806016 (calling snd_pcm_htimestamp(handle, &avail, &tstamp_before))
sleep of 2 milisec
After sleep = 142:414.806016 (calling snd_pcm_htimestamp(handle, &avail, &tstamp_after)
From the above timestamps, we can see that slave has returned the same timestamps, as --period-time choosen is 5msec.
2> Without this fix:
The timestamps are returned with realtime value.
 :~# time aplay --enable-tstamp -Dhtstamp_test --period-time=5000 -v -fdat /dev/urandom
Playing raw data '/dev/urandom' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
File PCM (file=/tmp/swarate_out.wav)
Final file PCM (file=/tmp/swarate_out.wav)
.
.
Slave: Hardware PCM card 0 'imx6q-sabresd-wm8962' device 0 subdevice 0
Its setup is:
stream  : PLAYBACK
access  : RW_INTERLEAVED
format  : S16_LE
subformat  : STD
channels  : 2
rate  : 48000
exact rate  : 48000 (48000/1)
msbits  : 16
buffer_size  : 24000
period_size  : 240
period_time  : 5000
tstamp_mode  : ENABLE
.
.
Before sleep = 241:136.875845 (calling snd_pcm_htimestamp(handle, &avail, &tstamp_before))
sleep of 2 milisec
After sleep = 241:139.076376 (calling snd_pcm_htimestamp(handle, &avail, &tstamp_after)
We can observe here, the timestamps shows time diff of ~2ms, which is the time gap of sleep duration.
Before sleep = 241:139.617588
After sleep = 241:141.746845
Before sleep = 241:142.291618
After sleep = 241:144.406406
Before sleep = 241:144.951421
After sleep = 241:147.066118
Before sleep = 241:147.623421
After sleep = 241:149.740573
- pcm:plug: save converter config
Passed config is freed after call to open, thus it is invalid when
trying to extract the converter name. So config entry is saved
for later usage.
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
- dmix plugin: drain - quickfix for the previous patch
- dmix plugin: fix drain for nonblock mode
- pcm file plugin: handle snd_pcm_mmap_begin() error path in snd_pcm_file_mmap_commit()
- always handle return value from snd_config_get_id() (coverity)
- pcm_plugin: unify the snd_pcm_mmap_begin result value checking
- pcm: rate: Add capability to pass configuration node to plugins
If a rate plugin uses a node (compound) instead of a plain string for
its "converter", and that compound is not a simple string array, then
the compound will be passed as an additional parameter to the new plugin
open() function (SND_PCM_RATE_PLUGIN_CONF_ENTRY(XXX)). The previous
open() function (SND_PCM_RATE_PLUGIN_ENTRY(XXX)) will be called if the
CONF version is not found. It is up to the plugin to determine whether
the presence of the conf parameter is mandatory.
- pcm: extplug: refinement of masks in extplug
It should be possible to use empty mask format with extplug.
The refinement of mask via extplug is now modified,
to accept empty masks as well to work properly.
- pcm: status dump fix timestamp formatting
nanosecond part formatted with %06 will give incorrect/confusing results:
trigger_time: 154.9748287
trigger_time: 154.60109090
trigger_time: 154.110425257
time seems to run backwards...
This patch converts to us before printing
which gives the correct/expected result:
trigger_time: 154.009748
trigger_time: 154.060109
trigger_time: 154.110425
- pcm: file: Enable file writing for capture path
This commit reverts parts of commit 4081be0b87ab9fa53a8906e66bc240f18a7a9a54,
because it is realy useful to use the file plugin in a capture path for
debugging. Also it fixes the truncate issue mentioned in above commit.
Additionally following MMAP access issue is considered:
$ arecord -D teeraw -M -d5 arecord.wav
Recording WAVE 'arecord.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
ALSA lib pcm/pcm_file.c:358:(snd_pcm_file_write_bytes)
write failed: Bad file descriptor
ALSA lib pcm/pcm_file.c:358:(snd_pcm_file_write_bytes)
write failed: Bad file descriptor
arecord: pcm/pcm_file.c:397: snd_pcm_file_add_frames:
Assertion `file->wbuf_used_bytes < file->wbuf_size_bytes' failed.
Aborted by signal Aborted...
- pcm: direct: fix race on clearing timer events
snd_timer handling is racy: plugins clear timer queue if avail_min
is not reached to force a sleep on timer. The race can happen if
the expected event arrives in between the avail check and the
clearing of pending events. If this race happens, the user will
unnecessarily wait for one more timer event. On low latency/realtime
streams this can lead to xruns and must be avoided.
As a fix we recheck avail after having cleared poll events.
- pcm: dmix_rewind corrupts application pointer fix
sometimes pulseaudio stops with the following assertion in libasound.so:
alsa-lib-1.0.29/src/pcm/pcm.c:2761:
snd_pcm_area_copy: Assertion `dst < src || dst >= src + bytes' failed.
Application pointer is handled properly, in cases of rewind operations.
- pcm: dmix: Allow disabling x86 optimizations
The dmix plugin has some optimized implementations for x86 using the
direct memory accesses, which was rather the original version, in
addition to the "generic" implementation using the semaphore
blocking. The x86 implementation relies on the memory coherency *and*
the fast read/write on it.
For other architectures, this has been always disabled just because of
memory coherency. But, the recent LPE audio development revealed
that, even on x86 platforms, the read/write performance might become
extremely bad when the buffer is marked as uncached. Some drivers
already know the buffer is uncached, we need to switch to the generic
mode in such a case.
This patch introduces yet another flag to dmix configuration,
direct_memory_access, that indicates whether the x86-specific
optimization can be used or not. Each driver can set the flag in its
cards config namespace, and the default dmix config refers to it.
As of this patch, only HDMI LPE Audio driver sets it.
- pcm: Disable locking in async mode
When PCM is operated in async mode and an async handler calls some PCM
functions with lock during other PCM operations, we may hit a
deadlock.
Although async mode is rarely used, it's still a possible use case.
Disable the locking when the stream is opened in async mode or it's
set to async mode via snd_pcm_async().
- pcm: Avoid lock for snd_pcm_nonblock()
snd_pcm_nonblock() is called as snd_pcm_abort(). Since
snd_pcm_abort() is called often from a signal handler to clean things
up (e.g. aplay does it), we may face a deadlock if the signal is
raised during the locked operation.
There can be some way to check the deadlock state, but they would cost
much. Since the race condition of snd_pcm_nonblock() is quite small,
let's just drop the locking inside snd_pcm_nonblock() as a
workaround.
- pcm: multi: Drop the fixed slave_map[] in snd_pcm_multi_open()
slave_map[] in snd_pcm_multi_open() is a fixed size array and
obviously we have no overflow check, and eventually the program gets
an error when more than 64 channels are used.
Although we can modify the code to allocate the array dynamically, it
turned out that we can drop the whole slave_map[] thingy in this
function when looking at the code closely. In the past, it was used
to identify the one-to-many mapping. But the check was dropped, and
now it's nothing more than a sanity check.
Reported-by: Jörg Müller <joerg.mueller7744@gmail.com>
- pcm: direct: Fix deadlock in poll_descriptors
The recent change in PCM direct plugins to check XRUN in
poll_descriptors callback caused a regression; as consequence, the
whole playback hangs up.
The culprit is a mutex dead lock by the call in snd_pcm_state() inside
the new snd_pcm_direct_poll_descriptors(). The poll_descriptors code
path is protected with pcm mutex, thus an unlocked version
(__snd_pcm_state()) has to be used inside the callback instead.
Fixes: 789ee39727a1 ("pcm: direct: check state before enter poll on timer")
- pcm: direct: don't return bogus buffer levels in xrun state
- pcm: direct: check state before enter poll on timer
To avoid the chances of timeout, we need to check the enter poll
in state xrun.
- pcm: direct: Fix for sync issue on xrun recover
If using very short periods, DSHARE/DSNOOP/DMIX may report underruns while in
status 'prepared'. This prohibits correct recovery. Now slave xrun conditions
for DSHARE/DSNOOP/DMIX are being handled properly.
- pcm: direct: returning semop error code for semaphore up/down failures
- rate: dynamic update avail_min on slave
- plugin: dynamically update avail_min on slave
mmapped capture access on some plugins can fetch data from
slave in the 'background'. A subsequent snd_pcm_wait waits
for too long time to reach avail_min threshold again.
Waiting too long leads to xruns on other devices waiting for
the capture data.
As a fix the avail_min on slave is recalculated dynamically.
V2: updated patch to fix within 80 characters per line
- pcm: rate: fix the hw_ptr update until the boundary available
For long time test case, the slave_hw_ptr will exceed the boundary
and wraparound the slave_hw_ptr. This slave boundary wraparound will
cause the rate->hw_ptr to wraparound irrespective of the
rate->boundary availability and due to that the available size goes
wrong.
Hence, to get the correct available size,
- Its necessary to increment the rate->hw_ptr upto the rate->boundary
and then wraparound the rate->hw_ptr.
- While handling fraction part of slave period, rounded value will be
introduced by input_frames(). To eliminate rounding issue on
rate->hw_ptr, subtract last rounded value from rate->hw_ptr and add
new rounded value of present slave_hw_ptr fraction part to
rate->hw_ptr.
- pcm: dshare: enable silence
This issue depends on system load - if the process using dshare is
scheduled fast enough, then there is no noise. A delay of e.g >~2ms
produces hearable noise.
Reproduction with instrumented aplay(sleep every 100th period for a
given time):
During the sleep time of 2000000us (2s) the hardware plays old samples
in a loop before xrun is detected and recovered after the sleep.
This is resolved by placing it in silence, in case of dshare plugin.
- pcm: direct: allow users to configure different period sizes
This patch allows the effective period size to be a multiple of the
slave-pcm period size.
Allowing only exact multiple of original period size is achieved by
borrowing code from the kernel hwrules implementation.
This patch is intended to save cpu workload when for example, the
slave operates with very small periods but a user does not need that
small periods.
This feature is enabled by default and can be disabled by adding
config option 'var_periodsize 0'.

RawMidi API

- rawmidi: virtual: fix reading into a small buffer
In the special case for handling partial messages, the pointer
calculations were wrong, which would result in data corruption.
Reviewd-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

Sequencer API

- seq: improve documentation about new get pid/card functions
Document the technique for determining if the running kernel supports
the new snd_seq_client_info_get_pid and snd_seq_client_info_get_card
functions. Also add a little information about how to use these
functions and add some cross references.

Timer API

- timer: obsolete legacy rtctimer instance
At v4.7 development, ALSA timer interface dropped device instance based on
legacy rtctimer implementation. User space applications should not use the
device instance.
This commit adds comments to notify a corresponding macro should not be
used anymore.

Topology API

- topology: Fix issue in parsing routes when generating topology binary
We missed parsing the index value, which is used as a use case indicator, when
processing the route objects.
This patch fixes the bug.
Tested-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
- conf: Allow dynamic top-level config directory
Currently the top-level config directory is specified only via
configure script option, and is fixed after that. It's inconvenient
when the library is moved to another base directory, or if you want to
use a library code (e.g. with $LD_PRELOAD) with the incompatible
config setups.
This patch allows user to override the top-level config path via the
environment varialbe, $ALSA_CONFIG_DIR. For that, a new helper
function, snd_config_topdir(), was introduced, and the codes referring
to the top config dir have been modified to handle it dynamically.
- topology: Allow a data section to contain multiple tuples objects
It's easy to use a vendor tuples object to define a C structure instance as
vendor specific parameter for kernel drivers. And sometimes the kernel drivers
may want a group of structures. So this patch will allow user to define multiple
vendor tuples objects in a data section, to avoid defining multiple data
sections and each data section only has 1 vendor tuples object.
There is no ABI change in this patch.
- topology: Group elements with the same index value into a block
Topology objects(widgets,controls) with different index value should be grouped
into different blocks and the block headers contain the index value.
Reviewed-by: Mengdong Lin <mengdong.lin@linux.intel.com>
- topology: Look up references for an object based on its index
We can distinguish different use cases by the object index value, the default
value is 0, meaning applicable for all use cases, defined by macro "SND_TOLG_INDEX_ALL".
An element can only refer to other elements for "all" use cases or the same use
cases, i.e. it can only refer to elements with index value "SND_TOLG_INDEX_ALL"
or the same index value as itself.
The object list has been sorted in ascending order of index, so when we look up
a reference for an object, we traverse the object list it depends on, if we have
not found the reference until index of the object list is greater than index of
the object, we give up and return an error.
Reviewed-by: Mengdong Lin <mengdong.lin@linux.intel.com>
- topology: Remove code parsing index value in paring each object
We insert a new element into the object list based on its index value, so we parse
index value in "tplg_elem_new_common" before insert it, and then remove code
parsing index value in parsing each object.
Reviewed-by: Mengdong Lin <mengdong.lin@linux.intel.com>
- topology: Insert new element based on its index value
When creating a new element, insert it into the list in the ascending order of
index value.
Reviewed-by: Mengdong Lin <mengdong.lin@linux.intel.com>
- topology: coverity - remove dead code
- always handle return value from snd_config_get_id() (coverity)
- topology: Fix incorrect license in source comments.
The topology source files had the wrong licence specified in the
comments when initially upstreamed. The topology source files are all
licensed under the LGPL-2.1 and not the GPLv2.
All earlier versions of the alsa-lib topology source files must be
considered LGPL-2.1 like the other source files in alsa-lib and also
as specified in the alsa-lib COPYING file.
- topology: fix unused-const-variable warning
Last year, unused static const variable was added, then compiler generates
a below warning.
dapm.c:43:30: warning: ‘widget_control_map’ defined but not used [-Wunused-const-variable=]
static const struct map_elem widget_control_map[] = {
^~~~~~~~~~~~~~~~~~
This commit removes it.
Fixes: 01a0e1a1c219 ("topology: Add DAPM object parser")

Use Case Manager API

- ucm parser: fix possible string overflow in uc_mgr_import_master_config()
- ucm: Add command 'get _file' to get the config file name of the opened card
After opening a card, this command can show the name of the actually
loaded configuration file, either matches the card name or card long name.
So developers can check if there is a device-sepcific configuration file
available for a given card.
- ucm: Load device-specific configuration file based on the card long name
Intel DSP platform drivers are used by many different devices. For user
space to differentiate them, ASoC machine drivers may use the DMI info
(vendor-product-version-board) as card long name. Possible card long names
are:
DellInc.-XPS139343-01-0310JH
ASUSTeKCOMPUTERINC.-T100TA-1.0-T100TA
Circuitco-MinnowboardMaxD0PLATFORM-D0-MinnowBoardMAX
...
If we want to define a device-specific UCM config file for a card, we
need to use the card long name as the name of both the directory that
contains the UCM config file and the UCM config file itself, like
longname/longname.conf
When being asked to load configuration file of a card, UCM will try to
find the card in the local machine and get its long name. If the card
long name is available, try to load the file longname/longname.conf to
get the best device-specific configuration; if this file is not available,
fall back to load the default configuration file shortname/shortname.conf
as before.
This update is backward compatible, because if ASoC machine drivers don't
explicity use DMI or other means to set the card long name, ASoC core
will use the card short name as the long name. And so UCM will load the
config file that matches both the card short name and the long name.
- ucm: Assure the user input card name not to exceed max size of card long name
Users can load a card's UCM configuration file by giving the card short
name or long name, which should not exceed the maximum card long name
defined by the kernel. The kernel uses an 80-character buffer to store
the card long name.
- ucm: parser needs limits.h
It's using PATH_MAX which is defined there, otherwise the build fails on
musl libc.
- ucm: Add ATTRIBUTE_UNUSED for unused parameters of execute_component_seq()
To fix the following warnings:
main.c: In function ‘execute_component_seq’:
main.c:489:24: warning: unused parameter ‘value_list1’ [-Wunused-parameter]
struct list_head *value_list1,
^
main.c:490:24: warning: unused parameter ‘value_list2’ [-Wunused-parameter]
struct list_head *value_list2,
^
main.c:491:24: warning: unused parameter ‘value_list3’ [-Wunused-parameter]
struct list_head *value_list3,
^

ALSA Lisp

- conf: Allow dynamic top-level config directory
Currently the top-level config directory is specified only via
configure script option, and is fixed after that. It's inconvenient
when the library is moved to another base directory, or if you want to
use a library code (e.g. with $LD_PRELOAD) with the incompatible
config setups.
This patch allows user to override the top-level config path via the
environment varialbe, $ALSA_CONFIG_DIR. For that, a new helper
function, snd_config_topdir(), was introduced, and the codes referring
to the top config dir have been modified to handle it dynamically.

Configuration

- conf: topology: Fix index mismatch for skl and bxt
The topology index in the conf is set to 1, where the driver expects index
set to 0. Fix the inconsistency.
- conf: Allow dynamic top-level config directory
Currently the top-level config directory is specified only via
configure script option, and is fixed after that. It's inconvenient
when the library is moved to another base directory, or if you want to
use a library code (e.g. with $LD_PRELOAD) with the incompatible
config setups.
This patch allows user to override the top-level config path via the
environment varialbe, $ALSA_CONFIG_DIR. For that, a new helper
function, snd_config_topdir(), was introduced, and the codes referring
to the top config dir have been modified to handle it dynamically.
- conf: Remove dmix.direct_memory_access setup
The commit [22eca6468b4a: pcm: dmix: Allow disabling x86
optimizations] introduced the new flag for dmix & co,
direct_memory_access. However, it turned out that such an addition of
the new flag in the default pcm definition causes an error when it's
used with old alsa-lib codes. Although the code added here is
correct, per se, and it works as expected, it's not wise to break the
configuration with old stuff -- even if the usage is somehow incorrect
and should be avoided.
Since the usage of the new flag is only for HDMI LPE audio, and the
usage of dmix itself should be limited with that hardware, this patch
removes the setup so that it works with the old alsa-lib again. We
may introduce the dmix behavior change in a smarter way, e.g. passing
some flag from the hardware driver so that it works more generically
without the manual fiddling of config files.
Bugzilla: http://bugzilla.opensuse.org/show_bug.cgi?id=1037021
- conf/cards: add VC4-HDMI card
Add a conf file for the VC4-HDMI sound card.
Tested-by: Eric Anholt <eric@anholt.net>
- pcm: dmix: Allow disabling x86 optimizations
The dmix plugin has some optimized implementations for x86 using the
direct memory accesses, which was rather the original version, in
addition to the "generic" implementation using the semaphore
blocking. The x86 implementation relies on the memory coherency *and*
the fast read/write on it.
For other architectures, this has been always disabled just because of
memory coherency. But, the recent LPE audio development revealed
that, even on x86 platforms, the read/write performance might become
extremely bad when the buffer is marked as uncached. Some drivers
already know the buffer is uncached, we need to switch to the generic
mode in such a case.
This patch introduces yet another flag to dmix configuration,
direct_memory_access, that indicates whether the x86-specific
optimization can be used or not. Each driver can set the flag in its
cards config namespace, and the default dmix config refers to it.
As of this patch, only HDMI LPE Audio driver sets it.
- conf: Add card config for Intel HDMI/DP LPE audio
It's a playback-only device with a single PCM dedicated for HDMI/DP
output. The dmix is working with the latest driver code, so enable it
for default, while providing the hdmi PCM dev for the accesses with
AES bits.
- conf/cards: add support for pistachio-card.
The data sheet of the chip and technical reference manual can be found at https://docs.creatordev.io/ci40/guides/hardwaredocs/cXT200_datasheet2.pdf
and https://docs.creatordev.io/ci40/guides/hardwaredocs/MIPS_Creator_cXT200_Technical_Reference_Manual_1.0.112.pdf.
The additional information about the cards can be found in src/conf/cards/pistachio-card.conf file.
- conf/ucm: broxton: add broxton-rt298 conf files
This adds the UCM conf files for broxton enabling with rt298 codec on
I2S audio, HDMI and DMIC ports.

External Rate Converter Plugin SDK

- pcm: rate: Add capability to pass configuration node to plugins
If a rate plugin uses a node (compound) instead of a plain string for
its "converter", and that compound is not a simple string array, then
the compound will be passed as an additional parameter to the new plugin
open() function (SND_PCM_RATE_PLUGIN_CONF_ENTRY(XXX)). The previous
open() function (SND_PCM_RATE_PLUGIN_ENTRY(XXX)) will be called if the
CONF version is not found. It is up to the plugin to determine whether
the presence of the conf parameter is mandatory.

Kernel Headers

- hwdep: add support for MOTU FireWire series and RME Fireface series
Drivers for MOTU FireWire series and RME Fireface series were newly added
to v4.12 kernel. Like the other drivers in ALSA firewire stack, they also
support HwDep interface.
This commit add entries for the drivers.
- hwdep: add Line6 USB series support
Drivers for Line6 USB series was firstly added to staging directory at
development period of v2.6.30 kernel. At v4.9 kernel development, they
were moved to sound directory. The drivers include HwDep interface, while
header in user space library has never been updated for an entry
corresponding to the drivers.
This commit adds the entry.
- timer: obsolete legacy rtctimer instance
At v4.7 development, ALSA timer interface dropped device instance based on
legacy rtctimer implementation. User space applications should not use the
device instance.
This commit adds comments to notify a corresponding macro should not be
used anymore.

alsa-utils

Core

- Release v1.1.4

ALSA Control (alsactl)

- alsactl: Remove standard output definition in systemd unit
`/lib/systemd/system/alsa-restore.service` specifies
`StandardOutput=syslog`. This overrides the `DefaultStandardOutput`
setting from `/etc/systemd/system.conf`, which the system administrator
can use to specify how output gets logged. In particular, the sysadmin
may want output to go to the journal, or to syslog, or nowhere at all [1].
This patch removes the definition entirely, so the units can use the
system default.
Upstream the patch from the Debian package [2].
[1] https://bugs.debian.org/741123
  "systemd services should not use StandardOutput=syslog; should rely
on DefaultStandardOutput"
[2] https://sources.debian.net/src/alsa-utils/1.1.2-1/debian/patches/systemd_standardoutput.patch/

ALSA RawMidi Utility (amidi)

- amidi: optarg might be NULL, fix 't' argument parsing

alsa-info.sh

- alsa-info: add ACPI device status
BIOS vendors typically reuse the same definitions between different
platforms and expose the relevant hardware by changing the value of
the _STA method.
For example on the Asus T100HA, there are 3 HID values for audio
codecs in the DSDT table but two have a zero status and will be
ignored by the ACPI subsystem.
$ more /sys/bus/acpi/devices/10EC*/status
 ::::::::::::::
/sys/bus/acpi/devices/10EC3270:00/status
 ::::::::::::::
15
 ::::::::::::::
/sys/bus/acpi/devices/10EC5640:00/status
 ::::::::::::::
0
 ::::::::::::::
/sys/bus/acpi/devices/10EC5648:00/status
 ::::::::::::::
0
This information is very useful to figure out which HIDs/quirks need
to be supported. Add log to alsa-info.sh to only expose non-zero
results of the ACPI _STA method, e.g.
 !!ACPI Device Status Information
 !!---------------
/sys/bus/acpi/devices/10EC3270:00/status 15
- alsa-info: provide more DMI information
Some manufacturers don't provide useful information for Manufacturer
and Product Name but instead use Board Vendor and Board Name fields,
add them to alsa-info log
Example on Intel NUC:
 !!DMI Information
 !!---------------
Manufacturer:
Product Name:
Product Version:
Firmware Version: KYSKLi70.86A.0042.2016.0929.1933
Board Vendor: Intel Corporation
Board Name: NUC6i7KYB

alsaucm

- alsaucm: Add alsaucm.rst to EXTRA_DIST
Otherwise it's missing in the tarball.

aplay/arecord

- aplay: Introduce and use xwrite helper
Write can return less then requested bytes, but we treat this as
an error thus ending up with confusing error messages.
Fix this by introducing xwrite helper, which makes sure all bytes
are written or an error is returned.
With this patch an usecase where disk is filled by recording will
print:
$ /mnt/msc/audio.wav: No space left on device
instead of random messages like:
$/mnt/msc/audio.wav: No such file or directory

tinycompress

Core

- Release v1.1.4

Utilities

- crecord: Add option to specify codec ID
This patch adds a -I command line option to set the codec ID,
either from a defined set of string values or as a number.
After discussion with Vinod it was agreed that we should only
allow writing to a file if we support creating the correct container
file format for that data. As we currently only have support for
creating WAV files only PCM data can be written to a file. Other
formats can be sent raw to stdout.
- crecord: Fix some minor coding style problems
- Incorrect indenting of arguments to capture_samples()
- Wrap long line in capture_samples()
- Added a blank line in main() for readability
- Deleted extra trailing blank line at end of file
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