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spa: add Latency param and object

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Add a new latency param that contains a latency object.
The latency object contains the min and max delay from a port to
the terminal sink/source. It is also possible to express this
delay as a fraction of the quantum to avoid having to recalculate
the latency every time the quantum changes.
This commit is contained in:
Wim Taymans 2021-05-21 09:55:31 +02:00
parent 46ef88e520
commit 1a8f274a80
4 changed files with 24 additions and 0 deletions
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10
spa/include/spa/param/param.h
View file

@ -56,6 +56,7 @@ enum spa_param_type {
SPA_PARAM_EnumRoute, /**< routing enumeration as SPA_TYPE_OBJECT_ParamRoute */
SPA_PARAM_Route, /**< routing configuration as SPA_TYPE_OBJECT_ParamRoute */
SPA_PARAM_Control, /**< Control parameter, a SPA_TYPE_Sequence */
SPA_PARAM_Latency, /**< latency reporting, a SPA_TYPE_OBJECT_ParamLatency */
};
/** information about a parameter */
@ -172,6 +173,15 @@ enum spa_param_route {
};
/** properties for SPA_TYPE_OBJECT_ParamLatency */
enum spa_param_latency {
SPA_PARAM_LATENCY_START,
SPA_PARAM_LATENCY_direction, /**< direction, input/output (Id enum spa_direction) */
SPA_PARAM_LATENCY_quantum, /**< latency relative to quantum (Float) */
SPA_PARAM_LATENCY_min, /**< min latency (Int) relative to rate */
SPA_PARAM_LATENCY_max, /**< max latency (Int) relative to rate */
};
/**
* \}
*/

12
spa/include/spa/param/type-info.h
View file

@ -59,6 +59,7 @@ static const struct spa_type_info spa_type_param[] = {
{ SPA_PARAM_EnumRoute, SPA_TYPE_OBJECT_ParamRoute, SPA_TYPE_INFO_PARAM_ID_BASE "EnumRoute", NULL },
{ SPA_PARAM_Route, SPA_TYPE_OBJECT_ParamRoute, SPA_TYPE_INFO_PARAM_ID_BASE "Route", NULL },
{ SPA_PARAM_Control, SPA_TYPE_Sequence, SPA_TYPE_INFO_PARAM_ID_BASE "Control", NULL },
{ SPA_PARAM_Latency, SPA_TYPE_OBJECT_ParamLatency, SPA_TYPE_INFO_PARAM_ID_BASE "Latency", NULL },
{ 0, 0, NULL, NULL },
};
@ -383,6 +384,17 @@ static const struct spa_type_info spa_type_profiler[] = {
{ 0, 0, NULL, NULL },
};
#define SPA_TYPE_INFO_PARAM_Latency SPA_TYPE_INFO_PARAM_BASE "Latency"
#define SPA_TYPE_INFO_PARAM_LATENCY_BASE SPA_TYPE_INFO_PARAM_Latency ":"
static const struct spa_type_info spa_type_param_latency[] = {
{ SPA_PARAM_LATENCY_START, SPA_TYPE_Id, SPA_TYPE_INFO_PARAM_LATENCY_BASE, spa_type_param, },
{ SPA_PARAM_LATENCY_direction, SPA_TYPE_Id, SPA_TYPE_INFO_PARAM_LATENCY_BASE "direction", spa_type_direction, },
{ SPA_PARAM_LATENCY_quantum, SPA_TYPE_Float, SPA_TYPE_INFO_PARAM_LATENCY_BASE "quantum", NULL, },
{ SPA_PARAM_LATENCY_min, SPA_TYPE_Int, SPA_TYPE_INFO_PARAM_LATENCY_BASE "min", NULL, },
{ SPA_PARAM_LATENCY_max, SPA_TYPE_Int, SPA_TYPE_INFO_PARAM_LATENCY_BASE "max", NULL, },
{ 0, 0, NULL, NULL },
};
/**
* \}

1
spa/include/spa/utils/type-info.h
View file

@ -123,6 +123,7 @@ static const struct spa_type_info spa_types[] = {
{ SPA_TYPE_OBJECT_ParamPortConfig, SPA_TYPE_Object, SPA_TYPE_INFO_PARAM_PortConfig, spa_type_param_port_config },
{ SPA_TYPE_OBJECT_ParamRoute, SPA_TYPE_Object, SPA_TYPE_INFO_PARAM_Route, spa_type_param_route },
{ SPA_TYPE_OBJECT_Profiler, SPA_TYPE_Object, SPA_TYPE_INFO_Profiler, spa_type_profiler },
{ SPA_TYPE_OBJECT_ParamLatency, SPA_TYPE_Object, SPA_TYPE_INFO_PARAM_Latency, spa_type_param_latency },
{ 0, 0, NULL, NULL }
};

1
spa/include/spa/utils/type.h
View file

@ -95,6 +95,7 @@ enum {
SPA_TYPE_OBJECT_ParamPortConfig,
SPA_TYPE_OBJECT_ParamRoute,
SPA_TYPE_OBJECT_Profiler,
SPA_TYPE_OBJECT_ParamLatency,
_SPA_TYPE_OBJECT_LAST, /**< not part of ABI */
/* vendor extensions */