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>
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>
Now all PCM plugins do support the proper timestamp type or pass it
over slaves. The internal monotonic flag is dropped and replaced with
tstamp_type in all places.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This patch implements the support for sw_params timestamp type in PCM
hw layer. As gettimestamp() is still unchanged, the resultant
timstamps may be still with CLOCK_MONOTONIC even if you pass monotonic
raw type. More fixes will follow.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
On most HDA Intel HDMI devices, the channel map list is approx. 500 ints
in size, making the 256-sized buffer used by
snd_pcm_query_chmaps_from_hw() too small and causing the query to fail
(NULL result to caller, ENOMEM).
Bump the buffer size to 2048 ints.
Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
We can't calculate memory storage in bytes, when we're supposed
to store ints in it!
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
These fields are not used, and their name similarity to other
fields are quite confusing when trying to debug alsa-lib.
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Instead of keeping modified asound.h and asequencer.h, copy the files
in the kernel include/uapi/sound as is, and give some renames for
avoiding conflicts with alsa-lib's definitions.
Some structs, unions and typedefs in asound.h and asequencer.h are
once renamed in local.h before inclusion, then renamed back again.
A bonus by this action is that some local codes don't have to refer to
sndrv_xxx any longer. However, some codes like src/seq/seq.c need
explicit cast because of unavoidable conflicts of struct types.
Another significant change is that now snd_pcm_sw_params.period_event
field is removed. Instead, try to access the last reserved field
internally.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Instead of a single channel map, multiple channel maps can be provided
in a form of compound (array) to hw and null plugins. In null
get_chmap, the channel map corresponding to the current channels is
copied from the given channel maps.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Add a config definition "chmap" to override (or enhance) the channel
maps. So far, only a single channel map can be provided, and the
channel count consistency isn't strictly tested at all.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This is a function similar like snd_pcm_query_chmaps() but performs
the query without a PCM handle. The card, device and substream
numbers are passed as well as stream direction.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Instead of passing ambiguous integer array, define snd_pcm_chmap_t and
snd_pcm_chmap_query_t so that user can understand more easily which
element is for what.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Added new channel-mapping API functions.
Not all plugins are covered, especially the route, multi and external
plugins don't work yet.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Dan McCombs discovered that snd_pcm_close() invocations are not leading
to associated timers being closed, which results in successively more
timers being created but not freed.
Original patch from Daniel T Chen <crimsun@ubuntu.com>.
BugLink: https://bugs.launchpad.net/bugs/451893
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
As the result of snd_pcm_delay() is affected not only by hw_ptr
and appl_ptr, but also by 'runtime->delay' property,
either SNDRV_PCM_IOCTL_DELAY or SNDRV_PCM_IOCTL_STATUS ioctl
must be used to get the correct result.
Previously 'runtime->delay' was ignored in case 'hw->sync_ptr'
was used.
Signed-off-by: Kai Vehmanen <kvehmanen@eca.cx>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This ensures they are emitted in .data.rel.ro rather than .data.rel,
which should make a nice difference when using prelink.
Signed-off-by: Diego E. 'Flameeyes' Pettenò <flameeyes@gmail.com>
The plug PCM copies the 'mode' field from the slave PCM. If blocking mode is
enabled for the plug PCM the mode is subsequently overwritten with the original
requested 'mode'. If non-blocking mode is requested this does not happen.
Because the hw PCM synthesizes the 'mode' from the actual file descriptor flags
no SND_PCM_NO_xxx will ever be set for it. This has the effect that the 'mode'
of the plug PCM will also not include those flags anymore -- unless they are
overwritten as mentioned above. This basically means SND_PCM_NO_xxx is ignored
for plug:hw:4711 style device strings opened in non-blocking mode.
You can easily test this with "aplay --channels 7 --disable-channels -f S16_LE
-r 44100 -D plug:hw:0" on a device that cannot do 7 channels. Normally this
call should fail, however if you add "-N" to the command line this call will
succeed.
This patch simply copies the SND_PCM_NO_xxx flags back into the 'mode' field in
case we don't overwrite it with the original anyway.
Probably closes bug 3571 for good.
From: Lennart Poettering <mznyfn@0pointer.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Two trivial compile warning fixes:
- Add a missing return to snd_pcm_hw_clear_timer_queue()
- params->info is no long but int
The second one might have hit already on 64bit machine, but alas,
no one didn't notice it.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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 restriction parameters to pcm hw layer.
The PCM hw has optional parameters, format, rate and channels, to restrict
the configuration. This is useful for definition of surround slave PCMs,
for example.
Add configuration options to change the default device path from the
default /dev/snd. This is useful for embedded systems that do not want
subdirectories in /dev.
