Inner this library, layouts of all structures are public. At a compilation
time, each size of the structures can be calculated. It means that we can
use automatic variable instead of calling alloca(3) to program this
library because in both ways storages are kept on stack frame of process
VMA. Besides, the usage of automatic variables requires less instructions
than calls of alloca(3). Furthermore, alloca(3) is not described in any
C language standards.
This commit replaces calls of alloca(3) just for structures with automatic
variables, for control features.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
When both an SPDIF and an HDMI output are present on HD-audio, both
try to access IEC958 controls with index=0 although one of them must
be wrong. For avoiding this conflict, the recent kernel code (3.9 and
3.8 stable) moves the IEC958 controls of an SPDIF with index=16 once
when the conflict happens.
In this patch, the corresponding support is added in alsa-lib side.
The new "skip_rest" boolean flag is added to the hooked element
definition which indicates that the rest of element array will be
ignored once when this element is present and evaluated. With this
new flag, the HD-audio config takes index=16 primarily, then take
index=0 as fallback.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
snd_config_get_bool() was improved to parse also ASCII strings now,
so we don't have to open-code the boolean parser in
src/control/setup.c any longer.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Only restore the old value if it differs from the requested
value, because if it has changed restoring the old value
overrides the change. Take for example, a voice modem with
a .conf that sets preserve off-hook. Start playback (on-hook
to off-hook), start record (off-hook to off-hook), stop
playback (off-hook to restore on-hook), stop record (on-hook
to restore off-hook), Clearly you don't want to leave the
modem "on the phone" now that there isn't any playback or
recording active.
Signed-off-by: David Fries <david@fries.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
- changed snd_config_get_id function to follow semantic of other get functions
- added snd_config_test_id
- added runtime pointer type (not persistent)
- added snd_config_make_pointer, snd_config_set_pointer, snd_config_get_pointer
- added type/contents checking for callback functions
- changed 'void *private_data' to 'snd_config_t *private_data'
- renamed card_strtype functions to card_driver
Control:
- fixed passing parameters to snd_ctl_async
Async handlers:
- added public snd_async_handler_get_signo function
Documentation:
- moved all documentation to source files
Added back modified snd_config_refer_load function.
Added snd_func_private_pcm_subdevice function.
Removed the callback from the snd_sctl_build function (no more required).
Modified alsa.conf to use refer {} blocks again.
Modified card specific conf files to use new snd_func_private_pcm_subdevice function.
- added pcm.front, pcm.rear, pcm.center_lfe blocks
* Added configuration for EMU10K1 (it's fully working one!!!)
* snd_config_redirect_load->snd_config_refer_load rename
* snd_config_search_alias code change (works also with pairs base.key)
* cleanups in the evaluate function (the function prototype has been changed)
The configuration root (snd_config) can be specified for the internal routines.
The pcm_hooks code was recoded (independent code moved to control/setup.c).
Improved the pcm_multi plugin (added master configuration).
- the /usr/share/alsa/cards.conf file contains the translation table
Added snd_sctl_build and snd_sctl_free functions.
Recoded the surround plugin to use the surround.conf file.
- the /usr/share/alsa/surround.conf file contains the surround configuration
