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playbin2: Transform QoS events to be meaningful for upstream elements

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This is necessary because the sinks don't notice the group switches
and the decoders/demuxers have a different running time than the
sinks.

Fixes bug #537050.
This commit is contained in:
Sebastian Dröge 2009-11-19 19:28:12 +01:00
parent ab0d802781
commit 1273909419
1 changed files with 156 additions and 1 deletions
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157
gst/playback/gstplaybin2.c
View file

@ -266,6 +266,10 @@ struct _GstSourceSelect
GstPad *sinkpad; /* the sinkpad of the sink when the selector
* is linked
*/
gulong src_event_probe_id;
gulong sink_event_probe_id;
GstClockTime group_start_accum;
};
#define GST_SOURCE_GROUP_GET_LOCK(group) (((GstSourceGroup*)(group))->lock)
@ -402,6 +406,8 @@ struct _GstPlayBin
GstFormat format;
gint64 duration;
} duration[5]; /* cached durations */
GstSegment segments[3]; /* Video/Audio/Text segments */
};
struct _GstPlayBinClass
@ -2339,6 +2345,112 @@ notify_tags_cb (GObject * object, GParamSpec * pspec, gpointer user_data)
ntdata->stream_id);
}
typedef struct
{
GstPlayBin *playbin;
GstSourceGroup *group;
GstPlaySinkType type;
} PlaySinkEventProbeData;
static gboolean
_playsink_src_event_probe_cb (GstPad * pad, GstEvent * event,
PlaySinkEventProbeData * data)
{
if (GST_EVENT_TYPE (event) == GST_EVENT_QOS) {
GstEvent *new_event;
GstStructure *s;
gdouble proportion;
GstClockTimeDiff diff;
GstClockTime group_start_accum =
data->group->selector[data->type].group_start_accum;
GstClockTime timestamp;
s = (GstStructure *) gst_event_get_structure (event);
if (gst_structure_has_field (s, "playbin2-adjusted-event"))
return TRUE;
/* If we have no group start accumulator yet, this is
* a QOS event for the previous group
*/
if (!GST_CLOCK_TIME_IS_VALID (group_start_accum))
return FALSE;
/* If the group start accumulator is 0, this is the first
* group and we don't need to do everything below
*/
if (group_start_accum == 0)
return TRUE;
gst_event_parse_qos (event, &proportion, &diff, &timestamp);
/* If the running time timestamp is smaller than the accumulator,
* the event is for a buffer from the previous group
*/
if (timestamp >= group_start_accum)
timestamp -= group_start_accum;
else
return FALSE;
/* That case is invalid for QoS events, also it means that
* we have switched the group but receive QoS events of
* the previous group.
*/
if (diff < 0 && -diff > timestamp)
return FALSE;
new_event = gst_event_new_qos (proportion, diff, timestamp);
s = (GstStructure *) gst_event_get_structure (new_event);
gst_structure_set (s, "playbin2-adjusted-event", G_TYPE_BOOLEAN, TRUE,
NULL);
gst_pad_send_event (pad, new_event);
return FALSE;
}
return TRUE;
}
static gboolean
_playsink_sink_event_probe_cb (GstPad * pad, GstEvent * event,
PlaySinkEventProbeData * data)
{
if (GST_EVENT_TYPE (event) == GST_EVENT_NEWSEGMENT) {
GstPlayBin *playbin = data->playbin;
GstSegment *segment;
guint index;
gboolean update;
GstFormat format;
gdouble rate, applied_rate;
gint64 start, stop, pos;
if (data->type == GST_PLAY_SINK_TYPE_VIDEO
|| data->type == GST_PLAY_SINK_TYPE_VIDEO_RAW)
index = 0;
else if (data->type == GST_PLAY_SINK_TYPE_AUDIO
|| data->type == GST_PLAY_SINK_TYPE_AUDIO_RAW)
index = 1;
else if (data->type == GST_PLAY_SINK_TYPE_TEXT)
index = 2;
else
g_assert_not_reached ();
segment = &playbin->segments[index];
gst_event_parse_new_segment_full (event, &update, &rate, &applied_rate,
&format, &start, &stop, &pos);
if (segment->format != format)
gst_segment_init (segment, format);
gst_segment_set_newsegment_full (segment, update, rate, applied_rate,
format, start, stop, pos);
if (!GST_CLOCK_TIME_IS_VALID (data->group->selector[data->
type].group_start_accum))
data->group->selector[data->type].group_start_accum = segment->accum;
}
return TRUE;
}
/* this function is called when a new pad is added to decodebin. We check the
* type of the pad and add it to the selector element of the group.
*/
@ -2414,6 +2526,8 @@ pad_added_cb (GstElement * decodebin, GstPad * pad, GstSourceGroup * group)
}
if (select->srcpad == NULL) {
PlaySinkEventProbeData *data = g_new (PlaySinkEventProbeData, 1);
if (select->selector) {
/* save source pad of the selector */
select->srcpad = gst_element_get_static_pad (select->selector, "src");
@ -2421,6 +2535,18 @@ pad_added_cb (GstElement * decodebin, GstPad * pad, GstSourceGroup * group)
/* no selector, use the pad as the source pad then */
select->srcpad = gst_object_ref (pad);
}
/* Install an event probe */
data->playbin = playbin;
data->group = group;
data->type = select->type;
select->src_event_probe_id =
gst_pad_add_event_probe_full (select->srcpad,
G_CALLBACK (_playsink_src_event_probe_cb), data,
(GDestroyNotify) g_free);
select->group_start_accum = -1;
/* block the selector srcpad. It's possible that multiple decodebins start
* pushing data into the selectors before we have a chance to collect all
* streams and connect the sinks, resulting in not-linked errors. After we
@ -2635,9 +2761,21 @@ no_more_pads_cb (GstElement * decodebin, GstSourceGroup * group)
* and link it. We only do this if we have not yet requested the sinkpad
* before. */
if (select->srcpad && select->sinkpad == NULL) {
PlaySinkEventProbeData *data = g_new (PlaySinkEventProbeData, 1);
GST_DEBUG_OBJECT (playbin, "requesting new sink pad %d", select->type);
select->sinkpad =
gst_play_sink_request_pad (playbin->playsink, select->type);
/* Install an event probe */
data->playbin = playbin;
data->group = group;
data->type = select->type;
select->sink_event_probe_id =
gst_pad_add_event_probe_full (select->sinkpad,
G_CALLBACK (_playsink_sink_event_probe_cb), data,
(GDestroyNotify) g_free);
res = gst_pad_link (select->srcpad, select->sinkpad);
GST_DEBUG_OBJECT (playbin, "linked type %s, result: %d",
select->media_list[0], res);
@ -3201,11 +3339,21 @@ deactivate_group (GstPlayBin * playbin, GstSourceGroup * group)
GST_LOG_OBJECT (playbin, "unlinking from sink");
gst_pad_unlink (select->srcpad, select->sinkpad);
if (select->sink_event_probe_id)
gst_pad_remove_event_probe (select->sinkpad,
select->sink_event_probe_id);
select->sink_event_probe_id = 0;
/* release back */
GST_LOG_OBJECT (playbin, "release sink pad");
gst_play_sink_release_pad (playbin->playsink, select->sinkpad);
select->sinkpad = NULL;
}
if (select->src_event_probe_id)
gst_pad_remove_event_probe (select->srcpad, select->src_event_probe_id);
select->src_event_probe_id = 0;
gst_object_unref (select->srcpad);
select->srcpad = NULL;
}
@ -3364,13 +3512,20 @@ gst_play_bin_change_state (GstElement * element, GstStateChange transition)
g_mutex_unlock (playbin->elements_lock);
memset (&playbin->duration, 0, sizeof (playbin->duration));
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
case GST_STATE_CHANGE_READY_TO_PAUSED:{
guint i;
GST_LOG_OBJECT (playbin, "clearing shutdown flag");
memset (&playbin->duration, 0, sizeof (playbin->duration));
g_atomic_int_set (&playbin->shutdown, 0);
for (i = 0; i < 3; i++)
gst_segment_init (&playbin->segments[i], GST_FORMAT_UNDEFINED);
if (!setup_next_source (playbin, GST_STATE_READY))
goto source_failed;
break;
}
case GST_STATE_CHANGE_PAUSED_TO_READY:
/* FIXME unlock our waiting groups */
GST_LOG_OBJECT (playbin, "setting shutdown flag");