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multiqueue: add buffering support

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Add support for buffering mode where we post BUFFERING messages based on the
level of the queues. It currently operates on the first queue that goes over or
under the high/low thresholds.
This commit is contained in:
Wim Taymans 2009-10-22 14:09:01 -04:00 committed by Wim Taymans
parent 07991ae4ab
commit 99dd9830a9
2 changed files with 61 additions and 12 deletions
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72
plugins/elements/gstmultiqueue.c
View file

@ -712,9 +712,10 @@ update_time_level (GstMultiQueue * mq, GstSingleQueue * sq)
sink_time = sq->sinktime =
gst_segment_to_running_time (&sq->sink_segment, GST_FORMAT_TIME,
sq->sink_segment.last_stop);
if (sink_time == GST_CLOCK_TIME_NONE)
goto beach;
sq->sink_tainted = FALSE;
if (G_UNLIKELY (sink_time != GST_CLOCK_TIME_NONE))
/* if we have a time, we become untainted and use the time */
sq->sink_tainted = FALSE;
} else
sink_time = sq->sinktime;
@ -722,9 +723,9 @@ update_time_level (GstMultiQueue * mq, GstSingleQueue * sq)
src_time = sq->srctime =
gst_segment_to_running_time (&sq->src_segment, GST_FORMAT_TIME,
sq->src_segment.last_stop);
if (src_time == GST_CLOCK_TIME_NONE)
goto beach;
sq->src_tainted = FALSE;
/* if we have a time, we become untainted and use the time */
if (G_UNLIKELY (src_time != GST_CLOCK_TIME_NONE))
sq->src_tainted = FALSE;
} else
src_time = sq->srctime;
@ -734,14 +735,61 @@ update_time_level (GstMultiQueue * mq, GstSingleQueue * sq)
/* This allows for streams with out of order timestamping - sometimes the
* emerging timestamp is later than the arriving one(s) */
if (sink_time < src_time)
goto beach;
if (G_LIKELY (sink_time != -1 && src_time != -1 && sink_time > src_time))
sq->cur_time = sink_time - src_time;
else
sq->cur_time = 0;
/* now calculate the buffering percent when we need to */
if (mq->use_buffering) {
GstDataQueueSize size;
gint percent, tmp;
gboolean post = FALSE;
gst_data_queue_get_level (sq->queue, &size);
GST_DEBUG_OBJECT (mq,
"queue %d: visible %u/%u, bytes %u/%u, time %" G_GUINT64_FORMAT "/%"
G_GUINT64_FORMAT, sq->id, size.visible, sq->max_size.visible,
size.bytes, sq->max_size.bytes, sq->cur_time, sq->max_size.time);
/* get bytes and time percentages and take the max */
percent = (sq->cur_time * 100) / sq->max_size.time;
tmp = (size.bytes * 100) / sq->max_size.bytes;
percent = MAX (tmp, percent);
percent = MIN (percent, 100);
if (mq->buffering) {
post = TRUE;
if (percent >= mq->high_percent) {
mq->buffering = FALSE;
}
} else {
if (percent < mq->low_percent) {
mq->buffering = TRUE;
post = TRUE;
}
}
if (post) {
GstMessage *message;
/* scale to high percent so that it becomes the 100% mark */
percent = percent * 100 / mq->high_percent;
/* clip */
if (percent > 100)
percent = 100;
GST_DEBUG_OBJECT (mq, "buffering %d percent", percent);
message = gst_message_new_buffering (GST_OBJECT_CAST (mq), percent);
gst_element_post_message (GST_ELEMENT_CAST (mq), message);
} else {
GST_DEBUG_OBJECT (mq, "filled %d percent", percent);
}
}
sq->cur_time = sink_time - src_time;
return;
beach:
sq->cur_time = 0;
}
/* take a NEWSEGMENT event and apply the values to segment, updating the time

1
plugins/elements/gstmultiqueue.h
View file

@ -60,6 +60,7 @@ struct _GstMultiQueue {
GstDataQueueSize max_size, extra_size;
gboolean use_buffering;
gint low_percent, high_percent;
gboolean buffering;
guint32 counter; /* incoming object counter, protected with STREAM_LOCK */
guint32 highid; /* contains highest id of last outputted object */