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devices: Use wrapper functions to set the *_volume and *_mute callbacks.

Browse source 
This is not currently useful but future commits will make further
changes concerning automatic setting of flags and event delivery
that makes this structure necessary.
This commit is contained in:
Colin Guthrie 2011-07-17 15:29:29 +01:00
parent 8840ebf9c3
commit ded07a5898
17 changed files with 175 additions and 67 deletions
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46
src/pulsecore/source.h
View file

@ -53,6 +53,9 @@ static inline pa_bool_t PA_SOURCE_IS_LINKED(pa_source_state_t x) {
return x == PA_SOURCE_RUNNING || x == PA_SOURCE_IDLE || x == PA_SOURCE_SUSPENDED;
}
/* A generic definition for void callback functions */
typedef void(*pa_source_cb_t)(pa_source *s);
struct pa_source {
pa_msgobject parent;
@ -111,13 +114,19 @@ struct pa_source {
/* Callled when the volume is queried. Called from main loop
* context. If this is NULL a PA_SOURCE_MESSAGE_GET_VOLUME message
* will be sent to the IO thread instead. If refresh_volume is
* FALSE neither this function is called nor a message is sent. */
void (*get_volume)(pa_source *s); /* ditto */
* FALSE neither this function is called nor a message is sent.
*
* You must use the function pa_source_set_get_volume_callback() to
* set this callback. */
pa_source_cb_t get_volume; /* may be NULL */
/* Called when the volume shall be changed. Called from main loop
* context. If this is NULL a PA_SOURCE_MESSAGE_SET_VOLUME message
* will be sent to the IO thread instead. */
void (*set_volume)(pa_source *s); /* ditto */
* will be sent to the IO thread instead.
*
* You must use the function pa_source_set_set_volume_callback() to
* set this callback. */
pa_source_cb_t set_volume; /* may be NULL */
/* Source drivers that set PA_SOURCE_SYNC_VOLUME must provide this
* callback. This callback is not used with source that do not set
@ -129,23 +138,32 @@ struct pa_source {
* The call is done inside pa_source_volume_change_apply(), which is
* not called automatically - it is the driver's responsibility to
* schedule that function to be called at the right times in the
* IO thread. */
void (*write_volume)(pa_source *s); /* ditto */
* IO thread.
*
* You must use the function pa_source_set_write_volume_callback() to
* set this callback. */
pa_source_cb_t write_volume; /* may be NULL */
/* Called when the mute setting is queried. Called from main loop
* context. If this is NULL a PA_SOURCE_MESSAGE_GET_MUTE message
* will be sent to the IO thread instead. If refresh_mute is
* FALSE neither this function is called nor a message is sent.*/
void (*get_mute)(pa_source *s); /* ditto */
* FALSE neither this function is called nor a message is sent.
*
* You must use the function pa_source_set_get_mute_callback() to
* set this callback. */
pa_source_cb_t get_mute; /* may be NULL */
/* Called when the mute setting shall be changed. Called from main
* loop context. If this is NULL a PA_SOURCE_MESSAGE_SET_MUTE
* message will be sent to the IO thread instead. */
void (*set_mute)(pa_source *s); /* ditto */
* message will be sent to the IO thread instead.
*
* You must use the function pa_source_set_set_mute_callback() to
* set this callback. */
pa_source_cb_t set_mute; /* may be NULL */
/* Called when a the requested latency is changed. Called from IO
* thread context. */
void (*update_requested_latency)(pa_source *s); /* ditto */
pa_source_cb_t update_requested_latency; /* may be NULL */
/* Called whenever the port shall be changed. Called from main
* thread. */
@ -270,6 +288,12 @@ pa_source* pa_source_new(
pa_source_new_data *data,
pa_source_flags_t flags);
void pa_source_set_get_volume_callback(pa_source *s, pa_source_cb_t cb);
void pa_source_set_set_volume_callback(pa_source *s, pa_source_cb_t cb);
void pa_source_set_write_volume_callback(pa_source *s, pa_source_cb_t cb);
void pa_source_set_get_mute_callback(pa_source *s, pa_source_cb_t cb);
void pa_source_set_set_mute_callback(pa_source *s, pa_source_cb_t cb);
void pa_source_put(pa_source *s);
void pa_source_unlink(pa_source *s);