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The simple mixer abstraction - more work

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- separated the "base library" from ac97.c (dynamically loaded)
  - added necessary handling of all private structures
  - added selector and sid registration functions and handling code
- added basic code for hda.c (yeah, my notebook has this hw)
This commit is contained in:
Jaroslav Kysela 2005-07-31 09:08:43 +00:00
parent c593c1d260
commit 59a8226184
9 changed files with 990 additions and 483 deletions
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71
src/mixer/simple_abst.c
View file

@ -48,14 +48,20 @@ typedef struct _class_priv {
int attach_flag;
snd_ctl_card_info_t *info;
void *dlhandle;
void *private_data;
void (*private_free)(snd_mixer_class_t *class);
} class_priv_t;
typedef int (*snd_mixer_sbasic_init_t)(snd_mixer_class_t *class);
static int try_open(snd_mixer_class_t *class, const char *lib)
{
class_priv_t *priv = snd_mixer_class_get_private(class);
snd_mixer_event_t event_func;
snd_mixer_sbasic_init_t init_func;
char *xlib, *path;
void *h;
int err;
path = getenv("ALSA_MIXER_SIMPLE_MODULES");
if (!path)
@ -79,7 +85,19 @@ static int try_open(snd_mixer_class_t *class, const char *lib)
free(xlib);
return -ENXIO;
}
init_func = dlsym(h, "alsa_mixer_simple_init");
if (init_func == NULL) {
SNDERR("Symbol 'alsa_mixer_simple_init' was not found in '%s'", xlib);
snd_dlclose(h);
free(xlib);
return -ENXIO;
}
free(xlib);
err = init_func(class);
if (err < 0) {
snd_dlclose(h);
return err;
}
snd_mixer_class_set_event(class, event_func);
priv->dlhandle = h;
return 1;
@ -148,6 +166,8 @@ static void private_free(snd_mixer_class_t *class)
{
class_priv_t *priv = snd_mixer_class_get_private(class);
if (priv->private_free)
priv->private_free(class);
if (priv->dlhandle)
snd_dlclose(priv->dlhandle);
if (priv->info)
@ -256,10 +276,9 @@ int snd_mixer_simple_basic_register(snd_mixer_t *mixer,
}
/**
* \brief Register mixer simple element class - basic abstraction
* \param mixer Mixer handle
* \param options Options container
* \param classp Pointer to returned mixer simple element class handle (or NULL
* \brief Basic Mixer Abstraction - Get information about device
* \param class Mixer class
* \param info Info structure
* \return 0 on success otherwise a negative error code
*/
int snd_mixer_sbasic_info(const snd_mixer_class_t *class, sm_class_basic_t *info)
@ -274,3 +293,47 @@ int snd_mixer_sbasic_info(const snd_mixer_class_t *class, sm_class_basic_t *info
info->info = priv->info;
return 0;
}
/**
* \brief Get private data for basic abstraction
* \param class Mixer class
* \return private data
*/
void *snd_mixer_sbasic_get_private(const snd_mixer_class_t *class)
{
class_priv_t *priv = snd_mixer_class_get_private(class);
if (class == NULL)
return NULL;
return priv->private_data;
}
/**
* \brief Set private data for basic abstraction
* \param class Mixer class
* \param private_data Private data
*/
void snd_mixer_sbasic_set_private(const snd_mixer_class_t *class, void *private_data)
{
class_priv_t *priv;
if (class == NULL)
return;
priv = snd_mixer_class_get_private(class);
priv->private_data = private_data;
}
/**
* \brief Set private data for basic abstraction
* \param class Mixer class
* \param private_data Private data
*/
void snd_mixer_sbasic_set_private_free(const snd_mixer_class_t *class, void (*private_free)(snd_mixer_class_t *class))
{
class_priv_t *priv;
if (class == NULL)
return;
priv = snd_mixer_class_get_private(class);
priv->private_free = private_free;
}