* Most of the event API is used inside plugins. Applications usually only
* construct and use seek events.
* To do that gst_event_new_seek() is used to create a seek event. It takes
- * the needed parameters to specity seeking time and mode.
+ * the needed parameters to specify seeking time and mode.
* <example>
* <title>performing a seek on a pipeline</title>
* <programlisting>
typedef struct
{
- GstQOSType type;
- gdouble proportion;
- gint64 diff;
- GstClockTime timestamp;
-} GstEventQOSData;
-
-typedef struct
-{
GstEvent event;
GstStructure *structure;
-
- union
- {
- GstEventQOSData qos;
- };
} GstEventImpl;
-#define GST_EVENT_STRUCTURE(e) (((GstEventImpl *)(e))->structure)
-#define GST_EVENT_IMPL(e,data,field) (((GstEventImpl *)(e))->data.field)
+#define GST_EVENT_STRUCTURE(e) (((GstEventImpl *)(e))->structure)
typedef struct
{
{GST_EVENT_CUSTOM_UPSTREAM, "custom-upstream", 0},
{GST_EVENT_CUSTOM_DOWNSTREAM, "custom-downstream", 0},
{GST_EVENT_CUSTOM_DOWNSTREAM_OOB, "custom-downstream-oob", 0},
+ {GST_EVENT_CUSTOM_DOWNSTREAM_STICKY, "custom-downstream-sticky", 0},
{GST_EVENT_CUSTOM_BOTH, "custom-both", 0},
{GST_EVENT_CUSTOM_BOTH_OOB, "custom-both-oob", 0},
{0, NULL, 0}
};
+GST_DEFINE_MINI_OBJECT_TYPE (GstEvent, gst_event);
+
void
-_gst_event_initialize (void)
+_priv_gst_event_initialize (void)
{
gint i;
- _gst_event_type = gst_mini_object_register ("GstEvent");
+ _gst_event_type = gst_event_get_type ();
g_type_class_ref (gst_seek_flags_get_type ());
g_type_class_ref (gst_seek_type_get_type ());
{
GstEventTypeFlags ret;
- ret = type & ((1 << GST_EVENT_STICKY_SHIFT) - 1);
+ ret = type & ((1 << GST_EVENT_NUM_SHIFT) - 1);
return ret;
}
g_slice_free1 (GST_MINI_OBJECT_SIZE (event), event);
}
+static void gst_event_init (GstEventImpl * event, gsize size,
+ GstEventType type);
+
static GstEvent *
-_gst_event_copy (GstEventImpl * event)
+_gst_event_copy (GstEvent * event)
{
GstEventImpl *copy;
GstStructure *s;
- copy = g_slice_dup (GstEventImpl, event);
- gst_mini_object_init (GST_MINI_OBJECT_CAST (copy), _gst_event_type,
- sizeof (GstEventImpl));
+ copy = g_slice_new0 (GstEventImpl);
+
+ gst_event_init (copy, sizeof (GstEventImpl), GST_EVENT_TYPE (event));
- GST_EVENT_TYPE (copy) = GST_EVENT_TYPE (event);
GST_EVENT_TIMESTAMP (copy) = GST_EVENT_TIMESTAMP (event);
GST_EVENT_SEQNUM (copy) = GST_EVENT_SEQNUM (event);
}
}
-static inline GstStructure *
-add_structure (GstEvent * event, GQuark name)
-{
- GstStructure *structure;
-
- structure = gst_structure_id_empty_new (name);
- gst_structure_set_parent_refcount (structure, &event->mini_object.refcount);
- /* FIXME, concurrent access can make us leak this */
- GST_EVENT_STRUCTURE (event) = structure;
-
- return structure;
-}
-
-static GstStructure *
-update_structure (GstEvent * event)
-{
- GstStructure *structure;
-
- structure = GST_EVENT_STRUCTURE (event);
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_QOS:
- {
- if (structure == NULL)
- structure = add_structure (event, GST_QUARK (EVENT_QOS));
-
- gst_structure_id_set (structure,
- GST_QUARK (TYPE), GST_TYPE_QOS_TYPE, GST_EVENT_IMPL (event, qos,
- type), GST_QUARK (PROPORTION), G_TYPE_DOUBLE,
- GST_EVENT_IMPL (event, qos, proportion), GST_QUARK (DIFF),
- G_TYPE_INT64, GST_EVENT_IMPL (event, qos, diff),
- GST_QUARK (TIMESTAMP), G_TYPE_UINT64, GST_EVENT_IMPL (event, qos,
- timestamp), NULL);
- break;
- }
- default:
- break;
- }
- return structure;
-}
-
/**
* gst_event_get_structure:
* @event: The #GstEvent.
{
g_return_val_if_fail (GST_IS_EVENT (event), NULL);
- return update_structure (event);
+ return GST_EVENT_STRUCTURE (event);
}
/**
g_return_val_if_fail (GST_IS_EVENT (event), NULL);
g_return_val_if_fail (gst_event_is_writable (event), NULL);
- structure = update_structure (event);
+ structure = GST_EVENT_STRUCTURE (event);
- if (structure == NULL)
+ if (structure == NULL) {
structure =
- add_structure (event, gst_event_type_to_quark (GST_EVENT_TYPE (event)));
-
+ gst_structure_new_id_empty (gst_event_type_to_quark (GST_EVENT_TYPE
+ (event)));
+ gst_structure_set_parent_refcount (structure, &event->mini_object.refcount);
+ GST_EVENT_STRUCTURE (event) = structure;
+ }
return structure;
}
* required.
*
* Note that events and messages share the same sequence number incrementor;
- * two events or messages will never not have the same sequence number unless
+ * two events or messages will never have the same sequence number unless
* that correspondence was made explicitly.
*
* Returns: The event's sequence number.
/**
* gst_event_new_flush_stop:
+ * @reset_time: if time should be reset
*
* Allocate a new flush stop event. The flush stop event can be sent
* upstream and downstream and travels serialized with the dataflow.
* Returns: (transfer full): a new flush stop event.
*/
GstEvent *
-gst_event_new_flush_stop (void)
+gst_event_new_flush_stop (gboolean reset_time)
{
- return gst_event_new (GST_EVENT_FLUSH_STOP);
+ GstEvent *event;
+
+ GST_CAT_INFO (GST_CAT_EVENT, "creating flush stop %d", reset_time);
+
+ event = gst_event_new_custom (GST_EVENT_FLUSH_STOP,
+ gst_structure_new_id (GST_QUARK (EVENT_FLUSH_STOP),
+ GST_QUARK (RESET_TIME), G_TYPE_BOOLEAN, reset_time, NULL));
+
+ return event;
+}
+
+/**
+ * gst_event_parse_flush_stop:
+ * @event: The event to parse
+ * @reset_time: (out): if time should be reset
+ *
+ * Parse the FLUSH_STOP event and retrieve the @reset_time member.
+ */
+void
+gst_event_parse_flush_stop (GstEvent * event, gboolean * reset_time)
+{
+ GstStructure *structure;
+
+ g_return_if_fail (GST_IS_EVENT (event));
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_FLUSH_STOP);
+
+ structure = GST_EVENT_STRUCTURE (event);
+ if (G_LIKELY (reset_time))
+ *reset_time =
+ g_value_get_boolean (gst_structure_id_get_value (structure,
+ GST_QUARK (RESET_TIME)));
}
/**
/**
* gst_event_new_caps:
- * @caps: a #GstCaps
+ * @caps: (transfer none): a #GstCaps
*
* Create a new CAPS event for @caps. The caps event can only travel downstream
* synchronized with the buffer flow and contains the format of the buffers
GST_CAT_INFO (GST_CAT_EVENT, "creating caps event %" GST_PTR_FORMAT, caps);
event = gst_event_new_custom (GST_EVENT_CAPS,
- gst_structure_id_new (GST_QUARK (EVENT_CAPS),
+ gst_structure_new_id (GST_QUARK (EVENT_CAPS),
GST_QUARK (CAPS), GST_TYPE_CAPS, caps, NULL));
return event;
/**
* gst_event_new_segment:
- * @segment: a #GstSegment
+ * @segment: (transfer none): a #GstSegment
*
* Create a new SEGMENT event for @segment. The segment event can only travel
* downstream synchronized with the buffer flow and contains timing information
* Returns: (transfer full): the new SEGMENT event.
*/
GstEvent *
-gst_event_new_segment (GstSegment * segment)
+gst_event_new_segment (const GstSegment * segment)
{
GstEvent *event;
g_return_val_if_fail (segment != NULL, NULL);
+ g_return_val_if_fail (segment->rate != 0.0, NULL);
+ g_return_val_if_fail (segment->applied_rate != 0.0, NULL);
+ g_return_val_if_fail (segment->format != GST_FORMAT_UNDEFINED, NULL);
- GST_CAT_INFO (GST_CAT_EVENT, "creating segment event %" GST_PTR_FORMAT,
+ GST_CAT_INFO (GST_CAT_EVENT, "creating segment event %" GST_SEGMENT_FORMAT,
segment);
event = gst_event_new_custom (GST_EVENT_SEGMENT,
- gst_structure_id_new (GST_QUARK (EVENT_SEGMENT),
+ gst_structure_new_id (GST_QUARK (EVENT_SEGMENT),
GST_QUARK (SEGMENT), GST_TYPE_SEGMENT, segment, NULL));
return event;
}
/**
- * gst_event_get_segment:
- * @event: The event
- *
- * Get the segment from @event. The segment remains valid as long as @event remains
- * valid.
+ * gst_event_parse_segment:
+ * @event: The event to parse
+ * @segment: (out) (transfer none): a pointer to a #GstSegment
*
- * Returns: the #GstSegment. The segment stays valid for as long as @event is
- * valid.
+ * Parses a segment @event and stores the result in the given @segment location.
+ * @segment remains valid only until the @event is freed. Don't modify the segment
+ * and make a copy if you want to modify it or store it for later use.
*/
-const GstSegment *
-gst_event_get_segment (GstEvent * event)
+void
+gst_event_parse_segment (GstEvent * event, const GstSegment ** segment)
{
GstStructure *structure;
- GstSegment *segment;
-
- g_return_val_if_fail (GST_IS_EVENT (event), NULL);
- g_return_val_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT, NULL);
- structure = GST_EVENT_STRUCTURE (event);
- segment = g_value_get_boxed (gst_structure_id_get_value (structure,
- GST_QUARK (SEGMENT)));
+ g_return_if_fail (GST_IS_EVENT (event));
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT);
- return segment;
+ if (segment) {
+ structure = GST_EVENT_STRUCTURE (event);
+ *segment = g_value_get_boxed (gst_structure_id_get_value (structure,
+ GST_QUARK (SEGMENT)));
+ }
}
/**
- * gst_event_parse_segment:
+ * gst_event_copy_segment:
* @event: The event to parse
- * @segment: a #GstSegment
+ * @segment: a pointer to a #GstSegment
*
- * Copy the segment values from @event into @segment.
+ * Parses a segment @event and copies the #GstSegment into the location
+ * given by @segment.
*/
void
-gst_event_parse_segment (GstEvent * event, GstSegment * segment)
+gst_event_copy_segment (GstEvent * event, GstSegment * segment)
{
const GstSegment *src;
- g_return_if_fail (segment != NULL);
-
- src = gst_event_get_segment (event);
- g_return_if_fail (src != NULL);
+ g_return_if_fail (GST_IS_EVENT (event));
+ g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT);
- gst_segment_copy_into (src, segment);
+ if (segment) {
+ gst_event_parse_segment (event, &src);
+ gst_segment_copy_into (src, segment);
+ }
}
/**
* Create a new buffersize event. The event is sent downstream and notifies
* elements that they should provide a buffer of the specified dimensions.
*
- * When the @async flag is set, a thread boundary is prefered.
+ * When the @async flag is set, a thread boundary is preferred.
*
* Returns: (transfer full): a new #GstEvent
*/
", maxsize %" G_GINT64_FORMAT ", async %d", gst_format_get_name (format),
minsize, maxsize, async);
- structure = gst_structure_id_new (GST_QUARK (EVENT_BUFFER_SIZE),
+ structure = gst_structure_new_id (GST_QUARK (EVENT_BUFFER_SIZE),
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
GST_QUARK (MINSIZE), G_TYPE_INT64, minsize,
GST_QUARK (MAXSIZE), G_TYPE_INT64, maxsize,
structure = GST_EVENT_STRUCTURE (event);
if (format)
- *format =
+ *format = (GstFormat)
g_value_get_enum (gst_structure_id_get_value (structure,
GST_QUARK (FORMAT)));
if (minsize)
GstClockTimeDiff diff, GstClockTime timestamp)
{
GstEvent *event;
+ GstStructure *structure;
/* diff must be positive or timestamp + diff must be positive */
g_return_val_if_fail (diff >= 0 || -diff <= timestamp, NULL);
- GST_CAT_INFO (GST_CAT_EVENT,
+ GST_CAT_LOG (GST_CAT_EVENT,
"creating qos type %d, proportion %lf, diff %" G_GINT64_FORMAT
", timestamp %" GST_TIME_FORMAT, type, proportion,
diff, GST_TIME_ARGS (timestamp));
- event = gst_event_new (GST_EVENT_QOS);
-
- GST_EVENT_IMPL (event, qos, type) = type;
- GST_EVENT_IMPL (event, qos, proportion) = proportion;
- GST_EVENT_IMPL (event, qos, diff) = diff;
- GST_EVENT_IMPL (event, qos, timestamp) = timestamp;
+ structure = gst_structure_new_id (GST_QUARK (EVENT_QOS),
+ GST_QUARK (TYPE), GST_TYPE_QOS_TYPE, type,
+ GST_QUARK (PROPORTION), G_TYPE_DOUBLE, proportion,
+ GST_QUARK (DIFF), G_TYPE_INT64, diff,
+ GST_QUARK (TIMESTAMP), G_TYPE_UINT64, timestamp, NULL);
+ event = gst_event_new_custom (GST_EVENT_QOS, structure);
return event;
}
gst_event_parse_qos (GstEvent * event, GstQOSType * type,
gdouble * proportion, GstClockTimeDiff * diff, GstClockTime * timestamp)
{
+ const GstStructure *structure;
+
g_return_if_fail (GST_IS_EVENT (event));
g_return_if_fail (GST_EVENT_TYPE (event) == GST_EVENT_QOS);
+ structure = GST_EVENT_STRUCTURE (event);
if (type)
- *type = GST_EVENT_IMPL (event, qos, type);
+ *type = (GstQOSType)
+ g_value_get_enum (gst_structure_id_get_value (structure,
+ GST_QUARK (TYPE)));
if (proportion)
- *proportion = GST_EVENT_IMPL (event, qos, proportion);
+ *proportion =
+ g_value_get_double (gst_structure_id_get_value (structure,
+ GST_QUARK (PROPORTION)));
if (diff)
- *diff = GST_EVENT_IMPL (event, qos, diff);
+ *diff =
+ g_value_get_int64 (gst_structure_id_get_value (structure,
+ GST_QUARK (DIFF)));
if (timestamp)
- *timestamp = GST_EVENT_IMPL (event, qos, timestamp);
+ *timestamp =
+ g_value_get_uint64 (gst_structure_id_get_value (structure,
+ GST_QUARK (TIMESTAMP)));
}
/**
stop);
}
- structure = gst_structure_id_new (GST_QUARK (EVENT_SEEK),
+ structure = gst_structure_new_id (GST_QUARK (EVENT_SEEK),
GST_QUARK (RATE), G_TYPE_DOUBLE, rate,
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
GST_QUARK (FLAGS), GST_TYPE_SEEK_FLAGS, flags,
g_value_get_double (gst_structure_id_get_value (structure,
GST_QUARK (RATE)));
if (format)
- *format =
+ *format = (GstFormat)
g_value_get_enum (gst_structure_id_get_value (structure,
GST_QUARK (FORMAT)));
if (flags)
- *flags =
+ *flags = (GstSeekFlags)
g_value_get_flags (gst_structure_id_get_value (structure,
GST_QUARK (FLAGS)));
if (start_type)
- *start_type =
+ *start_type = (GstSeekType)
g_value_get_enum (gst_structure_id_get_value (structure,
GST_QUARK (CUR_TYPE)));
if (start)
g_value_get_int64 (gst_structure_id_get_value (structure,
GST_QUARK (CUR)));
if (stop_type)
- *stop_type =
+ *stop_type = (GstSeekType)
g_value_get_enum (gst_structure_id_get_value (structure,
GST_QUARK (STOP_TYPE)));
if (stop)
GST_CAT_INFO (GST_CAT_EVENT,
"creating latency event %" GST_TIME_FORMAT, GST_TIME_ARGS (latency));
- structure = gst_structure_id_new (GST_QUARK (EVENT_LATENCY),
+ structure = gst_structure_new_id (GST_QUARK (EVENT_LATENCY),
GST_QUARK (LATENCY), G_TYPE_UINT64, latency, NULL);
event = gst_event_new_custom (GST_EVENT_LATENCY, structure);
* to skip @amount (expressed in @format) of media. It can be used to implement
* stepping through the video frame by frame or for doing fast trick modes.
*
- * A rate of <= 0.0 is not allowed, pause the pipeline or reverse the playback
- * direction of the pipeline to get the same effect.
+ * A rate of <= 0.0 is not allowed. Pause the pipeline, for the effect of rate
+ * = 0.0 or first reverse the direction of playback using a seek event to get
+ * the same effect as rate < 0.0.
*
* The @flush flag will clear any pending data in the pipeline before starting
* the step operation.
GST_CAT_INFO (GST_CAT_EVENT, "creating step event");
- structure = gst_structure_id_new (GST_QUARK (EVENT_STEP),
+ structure = gst_structure_new_id (GST_QUARK (EVENT_STEP),
GST_QUARK (FORMAT), GST_TYPE_FORMAT, format,
GST_QUARK (AMOUNT), G_TYPE_UINT64, amount,
GST_QUARK (RATE), G_TYPE_DOUBLE, rate,
structure = GST_EVENT_STRUCTURE (event);
if (format)
- *format = g_value_get_enum (gst_structure_id_get_value (structure,
+ *format =
+ (GstFormat) g_value_get_enum (gst_structure_id_get_value (structure,
GST_QUARK (FORMAT)));
if (amount)
*amount = g_value_get_uint64 (gst_structure_id_get_value (structure,
*
* Returns: (transfer full): a new #GstEvent
*
- * Since: 0.10.34
+ * Since: 0.11.0
*/
GstEvent *
gst_event_new_reconfigure (void)
GST_CAT_INFO (GST_CAT_EVENT, "creating sink-message event");
- structure = gst_structure_id_new (GST_QUARK (EVENT_SINK_MESSAGE),
+ structure = gst_structure_new_id (GST_QUARK (EVENT_SINK_MESSAGE),
GST_QUARK (MESSAGE), GST_TYPE_MESSAGE, msg, NULL);
event = gst_event_new_custom (GST_EVENT_SINK_MESSAGE, structure);
projects / platform / upstream / gstreamer.git / blobdiff