[alsa-devel] aplay doesnt work - new problem`
I am trying to run my pcm external io type plugin on an arm based board. I have no kernel alsa driver and the user space plugin is supposed to take care of talking to DSP using shared memorty and send sound data.
Since, I dont have kernel space ALSA driver, do I need to enable kernel ALSA support in .config?
I am facing following problem,
#aplay ALSA lib conf.c:2852:(snd_config_hook_load) cannot access file /home/pharaoh/alsa/cards/aliases.conf ALSA lib pcm.c:2014:(snd_pcm_open_conf) Invalid type for PCM default definition (id: default, value: cards.pcm.default) aplay: main:550: audio open error: Invalid argument
I can see that, aliases.conf is being searched at wrong place (its actually looking on my host machine), how can I fix this?
-pharaoh.
On Tue, Mar 11, 2008 at 4:05 PM, Pharaoh . pharaoh137@gmail.com wrote:
I am trying to run my pcm external io type plugin on an arm based board. I have no kernel alsa driver and the user space plugin is supposed to take care of talking to DSP using shared memorty and send sound data.
Since, I dont have kernel space ALSA driver, do I need to enable kernel ALSA support in .config?
I am facing following problem,
#aplay ALSA lib conf.c:2852:(snd_config_hook_load) cannot access file /home/pharaoh/alsa/cards/aliases.conf ALSA lib pcm.c:2014:(snd_pcm_open_conf) Invalid type for PCM default definition (id: default, value: cards.pcm.default) aplay: main:550: audio open error: Invalid argument
I can see that, aliases.conf is being searched at wrong place (its actually looking on my host machine), how can I fix this?
-pharaoh.
Also, I am trying to make aplay work first, so not using
aplay -D my_plug test.wav.
And aliases.conf is already on board in /share/alsa/cards.
Pharaoh . wrote:
I am trying to run my pcm external io type plugin on an arm based board. I have no kernel alsa driver and the user space plugin is supposed to take care of talking to DSP using shared memorty and send sound data.
Since, I dont have kernel space ALSA driver, do I need to enable kernel ALSA support in .config?
No.
ALSA lib conf.c:2852:(snd_config_hook_load) cannot access file /home/pharaoh/alsa/cards/aliases.conf
What --*prefix options did you use when configuring alsa-lib? What did you use as DESTDIR when installing alsa-lib?
Regards, Clemens
On Wed, Mar 12, 2008 at 1:34 AM, Clemens Ladisch clemens@ladisch.de wrote:
Pharaoh . wrote:
I am trying to run my pcm external io type plugin on an arm based board.
I
have no kernel alsa driver and the user space plugin is supposed to take care of talking to DSP
using
shared memorty and send sound data.
Since, I dont have kernel space ALSA driver, do I need to enable kernel
ALSA
support in .config?
No.
ALSA lib conf.c:2852:(snd_config_hook_load) cannot access file /home/pharaoh/alsa/cards/aliases.conf
What --*prefix options did you use when configuring alsa-lib? What did you use as DESTDIR when installing alsa-lib?
Regards, Clemens
I configure alsa lib as :
./configure --host=$(ARCH_TOOLCHAIN_PREFIX)-linux --prefix=$(BUILD_OUTPUT) --exec-prefix=$(ROOTFS) --datadir=$(ROOTFS)/share --sysconfdir=$(ROOTFS)/etc --with-versioned=no --enable-static=yes
Ignore $(ARCH_TOOLCHAIN_PREFIX)-linux. ROOTFS in / on board. DESTDIR is is /lib in rootfs, this is where libasound.so falls.
But when I do file on resulting libasound.so it is shown as shared lib and not a static one.
Same way I configure the alsa-utils.
-pharaoh.
On Wed, Mar 12, 2008 at 11:49 AM, Pharaoh . pharaoh137@gmail.com wrote:
On Wed, Mar 12, 2008 at 1:34 AM, Clemens Ladisch clemens@ladisch.de wrote:
Pharaoh . wrote:
I am trying to run my pcm external io type plugin on an arm based
board. I
have no kernel alsa driver and the user space plugin is supposed to take care of talking to DSP
using
shared memorty and send sound data.
Since, I dont have kernel space ALSA driver, do I need to enable
kernel ALSA
support in .config?
No.
ALSA lib conf.c:2852:(snd_config_hook_load) cannot access file /home/pharaoh/alsa/cards/aliases.conf
What --*prefix options did you use when configuring alsa-lib? What did you use as DESTDIR when installing alsa-lib?
Regards, Clemens
I configure alsa lib as :
./configure --host=$(ARCH_TOOLCHAIN_PREFIX)-linux --prefix=$(BUILD_OUTPUT) --exec-prefix=$(ROOTFS) --datadir=$(ROOTFS)/share --sysconfdir=$(ROOTFS)/etc --with-versioned=no --enable-static=yes
Ignore $(ARCH_TOOLCHAIN_PREFIX)-linux. ROOTFS in / on board. DESTDIR is is /lib in rootfs, this is where libasound.so falls.
But when I do file on resulting libasound.so it is shown as shared lib and not a static one.
Same way I configure the alsa-utils.
-pharaoh.
Now I am trying with my plugin, but I get following error, (this was part of another thread but it is defunct now, apologies)
# aplay -D my_plug aplay: can't resolve symbol 'snd_dlsym_start
When I do a nm -D on my plugin, I get following: U __assert U __udivsi3 U __umodsi3 U calloc U free U host_OMX_Deinit U host_OMX_Init U ilclient_change_component_state U ilclient_cleanup_components U ilclient_create_component U ilclient_destroy U ilclient_disable_port U ilclient_enable_port U ilclient_init U ilclient_set_empty_buffer_done_callback U ilclient_wait_for_event U memset * U printf* U puts U snd_config_get_id U snd_config_get_integer U snd_config_get_string U snd_config_iterator_end U snd_config_iterator_entry U snd_config_iterator_first U snd_config_iterator_next * U snd_dlsym_start* U snd_lib_error U snd_pcm_bytes_to_frames U snd_pcm_format_name U snd_pcm_format_physical_width U snd_pcm_format_value U snd_pcm_ioplug_create U snd_pcm_ioplug_delete U snd_pcm_ioplug_set_param_list U snd_pcm_ioplug_set_param_minmax U snprintf U strcmp U uCloseMutex U uCreateMutex U uGetMutex U uReleaseMutex
This is quite alright and these syms should be resolved runtime, but when I did
#nm -D lib/libasound.so* | grep "snd_dlsym_start"
I get nothing, where snd_dlsym_start is supposed to be? As per my shallow reading on this matter this is used only when static libs are being emulated shared ones etc.
-pharaoh
participants (2)
-
Clemens Ladisch -
Pharaoh .