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core: pipeline: add gst_pipeline_get_configured_latency()

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4472>
This commit is contained in:
Guillaume Desmottes 2023-04-24 09:28:22 +02:00
parent ba4ab9dc16
commit c9c7e83a78
3 changed files with 52 additions and 0 deletions
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17
girs/Gst-1.0.gir
View file

@ -32854,6 +32854,23 @@ clock, even if the pipeline is not in the PLAYING state.</doc>
</instance-parameter>
</parameters>
</method>
<method name="get_configured_latency" c:identifier="gst_pipeline_get_configured_latency" version="1.24">
<doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstpipeline.c">Return the configured latency on @pipeline.</doc>
<source-position filename="../subprojects/gstreamer/gst/gstpipeline.h"/>
<return-value transfer-ownership="none">
<doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstpipeline.c">@pipeline configured latency, or %GST_CLOCK_TIME_NONE if none has been configured
because @pipeline did not reach the PLAYING state yet.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstpipeline.c">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_delay" c:identifier="gst_pipeline_get_delay">
<doc xml:space="preserve" filename="../subprojects/gstreamer/gst/gstpipeline.c">Get the configured delay (see gst_pipeline_set_delay()).</doc>
<source-position filename="../subprojects/gstreamer/gst/gstpipeline.h"/>

32
subprojects/gstreamer/gst/gstpipeline.c
View file

@ -114,6 +114,7 @@ struct _GstPipelinePrivate
/* with LOCK */
gboolean auto_flush_bus;
gboolean is_live;
GstClockTime min_latency;
/* when we need to update stream_time or clock when going back to
* PLAYING*/
@ -234,6 +235,7 @@ gst_pipeline_init (GstPipeline * pipeline)
pipeline->priv->latency = DEFAULT_LATENCY;
pipeline->priv->is_live = FALSE;
pipeline->priv->min_latency = GST_CLOCK_TIME_NONE;
/* create and set a default bus */
bus = gst_bus_new ();
@ -521,6 +523,7 @@ gst_pipeline_change_state (GstElement * element, GstStateChange transition)
case GST_STATE_CHANGE_PAUSED_TO_READY:
GST_OBJECT_LOCK (element);
pipeline->priv->is_live = FALSE;
pipeline->priv->min_latency = GST_CLOCK_TIME_NONE;
GST_OBJECT_UNLOCK (element);
reset_start_time (pipeline, 0);
break;
@ -701,6 +704,10 @@ gst_pipeline_do_latency (GstBin * bin)
gst_query_parse_latency (query, &live, &min_latency, &max_latency);
GST_OBJECT_LOCK (pipeline);
pipeline->priv->min_latency = min_latency;
GST_OBJECT_UNLOCK (pipeline);
GST_DEBUG_OBJECT (pipeline,
"got min latency %" GST_TIME_FORMAT ", max latency %"
GST_TIME_FORMAT ", live %d", GST_TIME_ARGS (min_latency),
@ -1200,3 +1207,28 @@ gst_pipeline_is_live (GstPipeline * pipeline)
return is_live;
}
/**
* gst_pipeline_get_configured_latency:
* @pipeline: a #GstPipeline
*
* Return the configured latency on @pipeline.
*
* Returns: @pipeline configured latency, or %GST_CLOCK_TIME_NONE if none has been configured
* because @pipeline did not reach the PLAYING state yet.
*
* MT safe.
*
* Since: 1.24
*/
GstClockTime
gst_pipeline_get_configured_latency (GstPipeline * pipeline)
{
GstClockTime min_latency;
GST_OBJECT_LOCK (pipeline);
min_latency = pipeline->priv->min_latency;
GST_OBJECT_UNLOCK (pipeline);
return min_latency;
}

3
subprojects/gstreamer/gst/gstpipeline.h
View file

@ -133,6 +133,9 @@ gboolean gst_pipeline_get_auto_flush_bus (GstPipeline *pipeline);
GST_API
gboolean gst_pipeline_is_live (GstPipeline *pipeline);
GST_API
GstClockTime gst_pipeline_get_configured_latency (GstPipeline * pipeline);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstPipeline, gst_object_unref)
G_END_DECLS