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Add PCM_STATE_OPEN and PCM_STATE_SETUP macros so that
it can be utilized by plugin to update sync_ptr state.
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Older versions of linux's API header sound/asound.h accidentally rely on
indirect declaration of struct timespec, which isn't reliable, so
include time.h before it to support older versions of sound/asound.h
properly
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snd_ctl_event is needed by client to get details of event received.
Introduce mixer_read_event() with plugin support to support this.
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mixer_consume_event consumes subscribed events from the mixer
in order to allow monitoring of mixer control value changed.
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ssize_t is defined in <sys/types.h>, see
https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_types.h.html
Add an include for it to avoid a compile error when building with musl:
../include/tinyalsa/plugin.h:184:5: error: expected specifier-qualifier-list before 'ssize_t'
184 | ssize_t (*read_event) (struct mixer_plugin *plugin,
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Update the mixer framework to support plugins. Add ability for physical
card to have either kernel registered mixer controls or plugin
registered mixer control or both. Split mixer controls into two groups,
one for kernel registered (hw_grp) and the other for plugin registered
(virtual_grp).
Signed-off-by: Rohit kumar <rohitkr@codeaurora.org>
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
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Update the pcm framework to support plugins. Resolve the pcm device node
to be either kernel device or virtual device and setup function pointers
accordingly. Implement framework functionality for pcm_plugin.c for ease
of plugin development. Plugin itself is compiled as shared object (.so)
and dynamically linked from pcm_plugin.c.
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>
Signed-off-by: Rohit kumar <rohitkr@codeaurora.org>
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Signed-off-by: Ricardo Biehl Pasquali <pasqualirb@gmail.com>
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The Meson build system is being adopted by projects
such as GNOME, PulseAudio, GStreamer, VLC, systemd, Mesa,
Wayland, X.org, and many others. Having a meson build
upstream in tinyalsa would allow for easy use of tinyalsa
as a Meson subproject in other projects.
https://mesonbuild.com
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The ssize_t type requires the unistd.h header. This fixes build with musl
libc:
In file included from ../include/tinyalsa/limits.h:32:0,
from limits.c:1:
../include/tinyalsa/interval.h:38:2: error: unknown type name 'ssize_t'
ssize_t max;
^
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
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ALSA controls support polling on the kcontrols, this is used in HD-A for
jack notifcation. In tinyalsa we can use this for notfication from sound
card for any events detected by DSP
Change-Id: I4193809bfcdb60f4dc11e1c2ad6a07b29cfa80e9
Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
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The TLV byte controls expect a TLV header as well. Check for TLV
access and add TLV header size before invoking mixer API.
Change-Id: I12ba129e5bbc0676e80eb920e85b3683decfe0db
Signed-off-by: Pawse, GuruprasadX <guruprasadx.pawse@intel.com>
Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
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Tinyalsa doesn't expose an api to check TLV RW access
Add mixer_ctl_is_access_tlv_rw().
This api will get used by tinymix and audio HALs for checking TLV RW
access before managing the byte related mixer controls.
Change-Id: Ib5707fabf479de638e1c7abd4cd149e7637ff9c2
Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
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overrun is in capture and underrun is in playback.
Look:
'+' has data / '-' hasn't data
overrun (capture):
You should have
read until here
v
|+++++++|++ <- buffer over(run/flow)
underrun (playback):
You should have
written until here
v
|+++++++|-- <- buffer under(run/flow)
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This function parses a PCM name similar to the ALSA library.
This is done so that the differences between alsa-lib and tinyalsa
are a little more transparent to the user.
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The link function is necessary for time sychronization between multiple PCMs.
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It was added because bionic didn't have a copy of the file in 2011.
But, it was finally added in 2013 and update since.
There is no longer a need for this file.
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New controls could appear during runtime, for example if a
new firmware is downloaded to a DSP. Since ALSA drivers are
not supposed to delete or renumber existing controls we can
assume that any new controls will be after any controls we
already know about. We can use this to enable extending our
current list of controls, which is more efficient than
closing the mixer session and recreating it.
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
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pcm_readi and pcm_writei now use a frame count to specify the
buffer length instead of using a byte count.
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Added these functions to replace pcm_read and pcm_write, which don't return the number of frames actually transferred.
On GCC-like compilers, pcm_read and pcm_write have been marked as deprecated
On doxygen documentation, they have been marked as deprecated as well.
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Added functions:
- pcm_get_channels
- pcm_get_rate
- pcm_get_format
These were added since they're required for iterating samples and frames.
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This function is used to get the number of mixer controls by a given name.
It was added for use with mixer_get_ctl_by_name_and_index so that client code
can expect the last valid index to pass.
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This function was added to make available a mixer control accessor
in a function that does not modify its value.
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Functions changed are:
- mixer_get_name
- mixer_get_num_ctls
- mixer_ctl_get_id
- mixer_ctl_get_name
- mixer_ctl_get_type
- mixer_ctl_get_type_string
- mixer_ctl_get_num_values
- mixer_ctl_get_num_enums
- mixer_ctl_get_enum_string
- mixer_ctl_get_percent
- mixer_ctl_get_value
- mixer_ctl_get_array
- mixer_ctl_get_range_min
- mixer_ctl_get_range_max
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pcm_get_file_descriptor
pcm_get_error
pcm_get_buffer_size
pcm_frames_to_bytes
pcm_bytes_to_frames
pcm_get_subdevice
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The const specifier was added to the struct pcm_config argument.
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Funtions changed are:
- pcm_params_get_mask
- pcm_params_get_min
- pcm_params_get_max
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