The documentation for the latency parameter of pcm_set_params() says
that the value 0 uses an optimal value. This is wrong, as there is no
special handling for 0, and the result will be a buffer of minimal size.
Therefore, remove that incorrect statement.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
The revents parameter is ambiguously defined whether it's a pointer
to a single event or an arary.
This patch defines the behavior of revents more strictly (in the
function description): it's a pointer of a single event.
Also fixed snd_pcm_wait_nocheck() to follow that rule.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Use "const char *const []" as type for string arrays, or convert to
"const char [][x]" when it makes sense.
Signed-off-by: Diego E. 'Flameeyes' Pettenò <flameeyes@gmail.com>
As proposed in http://mailman.alsa-project.org/pipermail/alsa-devel/2008-June/008558.html
the snd_pcm_avail() and snd_pcm_avail_delay() functions are now available
to get accurate stream position in a straight way. The snd_pcm_avail_delay()
function was added to ensure full sync between avail and delay values. It's
actually implemented using delay() + avail_update() calls but it might be
changed in future.
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
snd_pcm_delay() is for synchronization purposes, it returns the overall latency
of the stream, not just the latency induced by the hardware playback buffer.
The documentation is a bit misleading about this fact, and some people already
misunderstood it. So let's reword this to make the explanation clearer and
explicit.
This is a result of the discussions of the thread this mail belongs to:
http://mailman.alsa-project.org/pipermail/alsa-devel/2008-June/008456.html
From: Lennart Poettering <mznyfn@0pointer.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
The PCM name isn't set properly on empty and asym plugins due to its call
of snd_pcm_open_slave(). Now a new function snd_pcm_open_named_slave()
is created and make snd_pcm_open_slave() an inline function calling the
new one with name=NULL.
Added --with-configdir and --with-plugindir options to configure
which specify the directories for config files and plugin objects
respectively. The default paths when these options are not
specified are unchanged.
Instead of link_fd, more generic callback link_slaves is introduced.
This is called for linking the slave streams as the source to the
given master stream.
- add long card name to device description
- create empty PCM plugin to allow right hint description parsing
- reorder devices in alsa.conf
- make namehint more configurable (using default.namehint.showall switch)
- add two levels basic and exteded for hints to default configuration files
- do not show direct device aliases
- removed all known memory leaks
- add snd_device_name_hint() and snd_device_name_free_hint() functions
- add snd_ctl_iface_conf_name() functions
- do not accept parameters for the plugin definition without @args section
- add defaults.pcm.dmix.card/device and dsnoop.card/device definitions
- add hints for HDA-Intel.conf, pcm/dmix.conf, pcm/dsnoop.conf and alsa.conf
- add test/namehint test utility
- doxygen related cleanups
Fix the PCM auto-start conditions
- The capture stream should be started the PCM anyway before reads
- Fixed the endless poll() when the written size doesn't fit to the
buffer size due to lack of auto-start
Remove several memory leaks by not aborting prematurely from a
snd_xxx_close() function when some operation fails.
This can happen when a USB device was unplugged.
