mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-10-29 05:40:25 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add snd_{ctl|pcm}_open_fallback() functions

Browse source 
This patch adds new API functions, snd_ctl_open_fallback() and
snd_pcm_open_fallback().  These are just like snd_*_open_lconf() but
used to open a fallback PCM/control.  The difference is that it replaces
the name string with the given original name, so that hctl and other
upper-layers will recognize it as an alias.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2011-07-26 13:10:24 +02:00
parent e6f990e5c9
commit acb423d937
4 changed files with 50 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
include/control.h
View file

@ -224,6 +224,7 @@ char *snd_device_name_get_hint(const void *hint, const char *id);
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode);
int snd_ctl_close(snd_ctl_t *ctl);
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl,

3
include/pcm.h
View file

@ -410,6 +410,9 @@ int snd_pcm_open(snd_pcm_t **pcm, const char *name,
int snd_pcm_open_lconf(snd_pcm_t **pcm, const char *name,
snd_pcm_stream_t stream, int mode,
snd_config_t *lconf);
int snd_pcm_open_fallback(snd_pcm_t **pcm, snd_config_t *root,
const char *name, const char *orig_name,
snd_pcm_stream_t stream, int mode);
int snd_pcm_close(snd_pcm_t *pcm);
const char *snd_pcm_name(snd_pcm_t *pcm);

22
src/control/control.c
View file

@ -919,6 +919,28 @@ int snd_ctl_open_lconf(snd_ctl_t **ctlp, const char *name,
return snd_ctl_open_noupdate(ctlp, lconf, name, mode);
}
/**
* \brief Opens a fallback CTL
* \param ctlp Returned CTL handle
* \param root Configuration root
* \param name ASCII identifier of the CTL handle used as fallback
* \param orig_name The original ASCII name
* \param mode Open mode (see #SND_CTL_NONBLOCK, #SND_CTL_ASYNC)
* \return 0 on success otherwise a negative error code
*/
int snd_ctl_open_fallback(snd_ctl_t **ctlp, snd_config_t *root,
const char *name, const char *orig_name, int mode)
{
int err;
assert(ctlp && name && root);
err = snd_ctl_open_noupdate(ctlp, root, name, mode);
if (err >= 0) {
free((*ctlp)->name);
(*ctlp)->name = orig_name ? strdup(orig_name) : NULL;
}
return err;
}
#ifndef DOC_HIDDEN
#define TYPE(v) [SND_CTL_ELEM_TYPE_##v] = #v
#define IFACE(v) [SND_CTL_ELEM_IFACE_##v] = #v

24
src/pcm/pcm.c
View file

@ -2259,6 +2259,30 @@ int snd_pcm_open_lconf(snd_pcm_t **pcmp, const char *name,
return snd_pcm_open_noupdate(pcmp, lconf, name, stream, mode, 0);
}
/**
* \brief Opens a fallback PCM
* \param pcmp Returned PCM handle
* \param root Configuration root
* \param name ASCII identifier of the PCM handle
* \param orig_name The original ASCII name
* \param stream Wanted stream
* \param mode Open mode (see #SND_PCM_NONBLOCK, #SND_PCM_ASYNC)
* \return 0 on success otherwise a negative error code
*/
int snd_pcm_open_fallback(snd_pcm_t **pcmp, snd_config_t *root,
const char *name, const char *orig_name,
snd_pcm_stream_t stream, int mode)
{
int err;
assert(pcmp && name && root);
err = snd_pcm_open_noupdate(pcmp, root, name, stream, mode, 0);
if (err >= 0) {
free((*pcmp)->name);
(*pcmp)->name = orig_name ? strdup(orig_name) : NULL;
}
return err;
}
#ifndef DOC_HIDDEN
int snd_pcm_new(snd_pcm_t **pcmp, snd_pcm_type_t type, const char *name,
snd_pcm_stream_t stream, int mode)