Hi,
This patchset adds support extra information to the type-specific for
user-defined element set. Currently, 'dimension' is such an extra
information.
In ALSA kernel/userspace interface, information to an element is described
in this structure.
struct snd_ctl_elem_info {
struct snd_ctl_elem_id id;
unsigned int access;
unsigned int count;
pid_t owner;
union value;
union dimen;
unsigned char reserved[64 - 4 * sizeof(unsigned short)];
};
This structure includes reserved fields, thus it's possible to add
more fields for future extension.
Currently, APIs to add user-defined element set don't support such extra
fields. Meanwhile, supporting just the dimension field is not good as
stable library APIs.
This patchset changes prototype of the APIs with 'snd_ctl_elem_info_t'
instead of adding more parameters. Callers are expected to fill the parameter
with identification information and the extra information.
Takashi Sakamoto (5):
ctl: support extra information in user-defined element set
ctl: add an API to set dimension levels to element information
ctl: optimize a test for user-defined element set to older kernels
ctl: optimize a test for user-defined element set to changes of APIs
ctl: support dimension test for user-defined element set
include/control.h | 12 ++-
src/control/control.c | 219 +++++++++++++++++++++++---------------------
src/pcm/pcm_softvol.c | 10 +-
test/user-ctl-element-set.c | 122 ++++++++++++++++++------
4 files changed, 220 insertions(+), 143 deletions(-)
--
2.7.4
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