mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2025-02-17 03:35:21 +00:00
streamsynchronizer: Handle stream switching
* Update outgoing segment.base with accumulated time, ensuring all streams are synchronized. * Only consider streams as "new" is they have a STREAM_START event with a different seqnum. * Use GstStream segment.base instead of separate variable to store the past running time. * Disable passthrough * Switch to glib 2.32 GMutex/GCond * Avoid getting pad parent the expensive way * Minor other fixes
This commit is contained in:
Edward Hervey
parent
784ca61ced
commit
d86f6132ed
2 changed files with 69 additions and 136 deletions
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@ -22,7 +22,6 @@
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#endif
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#include "gststreamsynchronizer.h"
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#include "gst/glib-compat-private.h"
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GST_DEBUG_CATEGORY_STATIC (stream_synchronizer_debug);
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#define GST_CAT_DEFAULT stream_synchronizer_debug
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@ -31,7 +30,7 @@ GST_DEBUG_CATEGORY_STATIC (stream_synchronizer_debug);
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GST_LOG_OBJECT (obj, \
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"locking from thread %p", \
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g_thread_self ()); \
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g_mutex_lock (GST_STREAM_SYNCHRONIZER_CAST(obj)->lock); \
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g_mutex_lock (&GST_STREAM_SYNCHRONIZER_CAST(obj)->lock); \
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GST_LOG_OBJECT (obj, \
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"locked from thread %p", \
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g_thread_self ()); \
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@ -41,7 +40,7 @@ GST_DEBUG_CATEGORY_STATIC (stream_synchronizer_debug);
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GST_LOG_OBJECT (obj, \
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"unlocking from thread %p", \
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g_thread_self ()); \
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g_mutex_unlock (GST_STREAM_SYNCHRONIZER_CAST(obj)->lock); \
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g_mutex_unlock (&GST_STREAM_SYNCHRONIZER_CAST(obj)->lock); \
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} G_STMT_END
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static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src_%u",
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@ -53,8 +52,6 @@ static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink_%u",
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GST_PAD_REQUEST,
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GST_STATIC_CAPS_ANY);
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static const gboolean passthrough = FALSE;
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#define gst_stream_synchronizer_parent_class parent_class
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G_DEFINE_TYPE (GstStreamSynchronizer, gst_stream_synchronizer,
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GST_TYPE_ELEMENT);
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@ -67,42 +64,38 @@ typedef struct
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GstPad *sinkpad;
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GstSegment segment;
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gboolean wait;
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gboolean wait; /* TRUE if waiting/blocking */
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gboolean new_stream;
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gboolean drop_discont;
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gboolean is_eos;
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gboolean is_eos; /* TRUE if EOS was received */
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gboolean seen_data;
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gint64 running_time_diff;
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GCond stream_finish_cond;
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GCond *stream_finish_cond;
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/* seqnum of the previously received STREAM_START
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* default: G_MAXUINT32 */
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guint32 stream_start_seqnum;
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guint32 segment_seqnum;
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} GstStream;
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/* Must be called with lock! */
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static GstPad *
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static inline GstPad *
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gst_stream_get_other_pad (GstStream * stream, GstPad * pad)
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{
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if (stream->sinkpad == pad)
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return gst_object_ref (stream->srcpad);
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else if (stream->srcpad == pad)
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if (stream->srcpad == pad)
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return gst_object_ref (stream->sinkpad);
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return NULL;
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}
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static GstPad *
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gst_stream_get_other_pad_from_pad (GstPad * pad)
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gst_stream_get_other_pad_from_pad (GstStreamSynchronizer * self, GstPad * pad)
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{
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GstObject *parent = gst_pad_get_parent (pad);
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GstStreamSynchronizer *self;
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GstStream *stream;
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GstPad *opad = NULL;
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/* released pad does not have parent anymore */
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if (!G_LIKELY (parent))
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goto exit;
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self = GST_STREAM_SYNCHRONIZER (parent);
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GST_STREAM_SYNCHRONIZER_LOCK (self);
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stream = gst_pad_get_element_private (pad);
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if (!stream)
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@ -112,9 +105,7 @@ gst_stream_get_other_pad_from_pad (GstPad * pad)
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out:
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GST_STREAM_SYNCHRONIZER_UNLOCK (self);
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gst_object_unref (self);
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exit:
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if (!opad)
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GST_WARNING_OBJECT (pad, "Trying to get other pad after releasing");
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@ -129,7 +120,8 @@ gst_stream_synchronizer_iterate_internal_links (GstPad * pad,
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GstIterator *it = NULL;
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GstPad *opad;
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opad = gst_stream_get_other_pad_from_pad (pad);
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opad =
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gst_stream_get_other_pad_from_pad (GST_STREAM_SYNCHRONIZER (parent), pad);
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if (opad) {
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GValue value = { 0, };
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@ -152,7 +144,8 @@ gst_stream_synchronizer_query (GstPad * pad, GstObject * parent,
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GST_LOG_OBJECT (pad, "Handling query %s", GST_QUERY_TYPE_NAME (query));
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opad = gst_stream_get_other_pad_from_pad (pad);
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opad =
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gst_stream_get_other_pad_from_pad (GST_STREAM_SYNCHRONIZER (parent), pad);
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if (opad) {
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ret = gst_pad_peer_query (opad, query);
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gst_object_unref (opad);
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@ -170,9 +163,6 @@ gst_stream_synchronizer_src_event (GstPad * pad, GstObject * parent,
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GstPad *opad;
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gboolean ret = FALSE;
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if (passthrough)
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goto skip_adjustments;
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GST_LOG_OBJECT (pad, "Handling event %s: %" GST_PTR_FORMAT,
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GST_EVENT_TYPE_NAME (event), event);
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@ -181,7 +171,7 @@ gst_stream_synchronizer_src_event (GstPad * pad, GstObject * parent,
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gdouble proportion;
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GstClockTimeDiff diff;
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GstClockTime timestamp;
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gint64 running_time_diff;
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gint64 running_time_diff = -1;
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GstStream *stream;
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gst_event_parse_qos (event, NULL, &proportion, &diff, ×tamp);
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@ -190,15 +180,14 @@ gst_stream_synchronizer_src_event (GstPad * pad, GstObject * parent,
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GST_STREAM_SYNCHRONIZER_LOCK (self);
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stream = gst_pad_get_element_private (pad);
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if (stream)
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running_time_diff = stream->running_time_diff;
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else
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running_time_diff = -1;
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running_time_diff = stream->segment.base;
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GST_STREAM_SYNCHRONIZER_UNLOCK (self);
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if (running_time_diff == -1) {
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GST_WARNING_OBJECT (pad, "QOS event before group start");
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goto out;
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} else if (timestamp < running_time_diff) {
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}
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if (timestamp < running_time_diff) {
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GST_DEBUG_OBJECT (pad, "QOS event from previous group");
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goto out;
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}
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@ -227,9 +216,7 @@ gst_stream_synchronizer_src_event (GstPad * pad, GstObject * parent,
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break;
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}
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skip_adjustments:
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opad = gst_stream_get_other_pad_from_pad (pad);
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opad = gst_stream_get_other_pad_from_pad (self, pad);
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if (opad) {
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ret = gst_pad_push_event (opad, event);
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gst_object_unref (opad);
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@ -248,9 +235,6 @@ gst_stream_synchronizer_sink_event (GstPad * pad, GstObject * parent,
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GstPad *opad;
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gboolean ret = FALSE;
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if (passthrough)
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goto skip_adjustments;
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GST_LOG_OBJECT (pad, "Handling event %s: %" GST_PTR_FORMAT,
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GST_EVENT_TYPE_NAME (event), event);
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@ -258,12 +242,13 @@ gst_stream_synchronizer_sink_event (GstPad * pad, GstObject * parent,
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case GST_EVENT_STREAM_START:
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{
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GstStream *stream;
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guint32 seqnum = gst_event_get_seqnum (event);
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GList *l;
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gboolean all_wait = TRUE;
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GST_STREAM_SYNCHRONIZER_LOCK (self);
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stream = gst_pad_get_element_private (pad);
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if (stream) {
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GList *l;
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gboolean all_wait = TRUE;
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if (stream && stream->stream_start_seqnum != seqnum) {
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GST_DEBUG_OBJECT (pad, "Stream %d changed", stream->stream_number);
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@ -310,10 +295,11 @@ gst_stream_synchronizer_sink_event (GstPad * pad, GstObject * parent,
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for (l = self->streams; l; l = l->next) {
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GstStream *ostream = l->data;
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g_cond_broadcast (ostream->stream_finish_cond);
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g_cond_broadcast (&ostream->stream_finish_cond);
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}
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}
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}
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} else
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GST_DEBUG_OBJECT (self, "No stream or STREAM_START from same source");
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GST_STREAM_SYNCHRONIZER_UNLOCK (self);
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}
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break;
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@ -328,7 +314,7 @@ gst_stream_synchronizer_sink_event (GstPad * pad, GstObject * parent,
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if (stream) {
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if (stream->wait) {
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GST_DEBUG_OBJECT (pad, "Stream %d is waiting", stream->stream_number);
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g_cond_wait (stream->stream_finish_cond, self->lock);
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g_cond_wait (&stream->stream_finish_cond, &self->lock);
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stream = gst_pad_get_element_private (pad);
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if (stream)
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stream->wait = FALSE;
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@ -343,42 +329,9 @@ gst_stream_synchronizer_sink_event (GstPad * pad, GstObject * parent,
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if (stream && segment.format == GST_FORMAT_TIME) {
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if (stream->new_stream) {
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gint64 position_running_time = 0;
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gint64 stop_running_time = 0;
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if (stream->segment.format == GST_FORMAT_TIME) {
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position_running_time =
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gst_segment_to_running_time (&stream->segment, GST_FORMAT_TIME,
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stream->segment.position);
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position_running_time = MAX (position_running_time, 0);
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stop_running_time =
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gst_segment_to_running_time (&stream->segment, GST_FORMAT_TIME,
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stream->segment.stop);
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stop_running_time = MAX (position_running_time, 0);
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if (stop_running_time != position_running_time) {
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GST_WARNING_OBJECT (pad,
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"Gap between position and segment stop: %" GST_TIME_FORMAT
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" != %" GST_TIME_FORMAT, GST_TIME_ARGS (stop_running_time),
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GST_TIME_ARGS (position_running_time));
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}
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if (stop_running_time < position_running_time) {
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GST_DEBUG_OBJECT (pad, "Updating stop position");
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stream->segment.stop = stream->segment.position;
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gst_pad_push_event (stream->srcpad,
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gst_event_new_segment (&stream->segment));
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}
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stop_running_time = MAX (stop_running_time, position_running_time);
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GST_DEBUG_OBJECT (pad,
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"Stop running time of last group: %" GST_TIME_FORMAT,
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GST_TIME_ARGS (stop_running_time));
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}
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stream->new_stream = FALSE;
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stream->drop_discont = TRUE;
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segment.base = stop_running_time;
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segment.base = self->group_start_time;
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}
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GST_DEBUG_OBJECT (pad, "Segment was: %" GST_SEGMENT_FORMAT,
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@ -386,14 +339,15 @@ gst_stream_synchronizer_sink_event (GstPad * pad, GstObject * parent,
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gst_segment_copy_into (&segment, &stream->segment);
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GST_DEBUG_OBJECT (pad, "Segment now is: %" GST_SEGMENT_FORMAT,
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&stream->segment);
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stream->segment_seqnum = gst_event_get_seqnum (event);
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GST_DEBUG_OBJECT (pad, "Stream start running time: %" GST_TIME_FORMAT,
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GST_TIME_ARGS (stream->segment.base));
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stream->running_time_diff = stream->segment.base;
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{
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GstEvent *tmpev;
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tmpev = gst_event_new_segment (&stream->segment);
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gst_event_set_seqnum (tmpev, stream->segment_seqnum);
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gst_event_unref (event);
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event = tmpev;
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}
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@ -413,7 +367,7 @@ gst_stream_synchronizer_sink_event (GstPad * pad, GstObject * parent,
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stream = gst_pad_get_element_private (pad);
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if (stream) {
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GST_DEBUG_OBJECT (pad, "Flushing streams");
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g_cond_broadcast (stream->stream_finish_cond);
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g_cond_broadcast (&stream->stream_finish_cond);
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}
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GST_STREAM_SYNCHRONIZER_UNLOCK (self);
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break;
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@ -509,9 +463,7 @@ gst_stream_synchronizer_sink_event (GstPad * pad, GstObject * parent,
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break;
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}
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skip_adjustments:
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opad = gst_stream_get_other_pad_from_pad (pad);
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opad = gst_stream_get_other_pad_from_pad (self, pad);
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if (opad) {
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ret = gst_pad_push_event (opad, event);
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gst_object_unref (opad);
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@ -533,15 +485,6 @@ gst_stream_synchronizer_sink_chain (GstPad * pad, GstObject * parent,
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GstClockTime timestamp = GST_CLOCK_TIME_NONE;
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GstClockTime timestamp_end = GST_CLOCK_TIME_NONE;
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if (passthrough) {
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opad = gst_stream_get_other_pad_from_pad (pad);
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if (opad) {
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ret = gst_pad_push (opad, buffer);
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gst_object_unref (opad);
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}
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goto done;
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}
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GST_LOG_OBJECT (pad, "Handling buffer %p: size=%" G_GSIZE_FORMAT
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", timestamp=%" GST_TIME_FORMAT " duration=%" GST_TIME_FORMAT
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" offset=%" G_GUINT64_FORMAT " offset_end=%" G_GUINT64_FORMAT,
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@ -558,24 +501,25 @@ gst_stream_synchronizer_sink_chain (GstPad * pad, GstObject * parent,
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GST_STREAM_SYNCHRONIZER_LOCK (self);
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stream = gst_pad_get_element_private (pad);
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if (stream)
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if (stream) {
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stream->seen_data = TRUE;
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if (stream && stream->drop_discont) {
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buffer = gst_buffer_make_writable (buffer);
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GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT);
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stream->drop_discont = FALSE;
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}
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if (stream->drop_discont) {
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buffer = gst_buffer_make_writable (buffer);
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GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT);
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stream->drop_discont = FALSE;
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}
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if (stream && stream->segment.format == GST_FORMAT_TIME
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&& GST_CLOCK_TIME_IS_VALID (timestamp)) {
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GST_LOG_OBJECT (pad,
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"Updating last-stop from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
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GST_TIME_ARGS (stream->segment.position), GST_TIME_ARGS (timestamp));
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stream->segment.position = timestamp;
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if (stream->segment.format == GST_FORMAT_TIME
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&& GST_CLOCK_TIME_IS_VALID (timestamp)) {
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GST_LOG_OBJECT (pad,
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"Updating position from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
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GST_TIME_ARGS (stream->segment.position), GST_TIME_ARGS (timestamp));
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stream->segment.position = timestamp;
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}
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}
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GST_STREAM_SYNCHRONIZER_UNLOCK (self);
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opad = gst_stream_get_other_pad_from_pad (pad);
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opad = gst_stream_get_other_pad_from_pad (self, pad);
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if (opad) {
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ret = gst_pad_push (opad, buffer);
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gst_object_unref (opad);
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@ -590,7 +534,7 @@ gst_stream_synchronizer_sink_chain (GstPad * pad, GstObject * parent,
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if (stream && stream->segment.format == GST_FORMAT_TIME
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&& GST_CLOCK_TIME_IS_VALID (timestamp_end)) {
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GST_LOG_OBJECT (pad,
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"Updating last-stop from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
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"Updating position from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
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GST_TIME_ARGS (stream->segment.position),
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GST_TIME_ARGS (timestamp_end));
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stream->segment.position = timestamp_end;
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@ -637,7 +581,6 @@ gst_stream_synchronizer_sink_chain (GstPad * pad, GstObject * parent,
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GST_STREAM_SYNCHRONIZER_UNLOCK (self);
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}
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done:
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return ret;
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}
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@ -657,7 +600,9 @@ gst_stream_synchronizer_request_new_pad (GstElement * element,
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stream = g_slice_new0 (GstStream);
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stream->transform = self;
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stream->stream_number = self->current_stream_number;
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stream->stream_finish_cond = g_cond_new ();
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g_cond_init (&stream->stream_finish_cond);
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stream->stream_start_seqnum = G_MAXUINT32;
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stream->segment_seqnum = G_MAXUINT32;
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tmp = g_strdup_printf ("sink_%u", self->current_stream_number);
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stream->sinkpad = gst_pad_new_from_static_template (&sinktemplate, tmp);
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@ -743,14 +688,17 @@ gst_stream_synchronizer_release_stream (GstStreamSynchronizer * self,
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stream->segment.position);
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stop_running_time = MAX (stop_running_time, position_running_time);
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GST_DEBUG_OBJECT (stream->sinkpad,
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"Stop running time was: %" GST_TIME_FORMAT,
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GST_TIME_ARGS (stop_running_time));
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if (stop_running_time > self->group_start_time) {
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GST_DEBUG_OBJECT (stream->sinkpad,
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"Updating global start running time from %" GST_TIME_FORMAT " to %"
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GST_TIME_FORMAT, GST_TIME_ARGS (self->group_start_time),
|
||||
GST_TIME_ARGS (stop_running_time));
|
||||
|
||||
self->group_start_time = MAX (self->group_start_time, stop_running_time);
|
||||
self->group_start_time = stop_running_time;
|
||||
}
|
||||
}
|
||||
|
||||
g_cond_free (stream->stream_finish_cond);
|
||||
g_cond_clear (&stream->stream_finish_cond);
|
||||
g_slice_free (GstStream, stream);
|
||||
|
||||
/* NOTE: In theory we have to check here if all streams
|
||||
|
|
@ -787,7 +735,7 @@ gst_stream_synchronizer_change_state (GstElement * element,
|
|||
GstStateChange transition)
|
||||
{
|
||||
GstStreamSynchronizer *self = GST_STREAM_SYNCHRONIZER (element);
|
||||
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
|
||||
GstStateChangeReturn ret;
|
||||
|
||||
switch (transition) {
|
||||
case GST_STATE_CHANGE_NULL_TO_READY:
|
||||
|
|
@ -799,9 +747,6 @@ gst_stream_synchronizer_change_state (GstElement * element,
|
|||
self->group_start_time = 0;
|
||||
self->shutdown = FALSE;
|
||||
break;
|
||||
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
|
||||
GST_DEBUG_OBJECT (self, "State change PAUSED->PLAYING");
|
||||
break;
|
||||
case GST_STATE_CHANGE_PAUSED_TO_READY:{
|
||||
GList *l;
|
||||
|
||||
|
|
@ -810,7 +755,7 @@ gst_stream_synchronizer_change_state (GstElement * element,
|
|||
GST_STREAM_SYNCHRONIZER_LOCK (self);
|
||||
for (l = self->streams; l; l = l->next) {
|
||||
GstStream *ostream = l->data;
|
||||
g_cond_broadcast (ostream->stream_finish_cond);
|
||||
g_cond_broadcast (&ostream->stream_finish_cond);
|
||||
}
|
||||
self->shutdown = TRUE;
|
||||
GST_STREAM_SYNCHRONIZER_UNLOCK (self);
|
||||
|
|
@ -819,19 +764,12 @@ gst_stream_synchronizer_change_state (GstElement * element,
|
|||
break;
|
||||
}
|
||||
|
||||
{
|
||||
GstStateChangeReturn bret;
|
||||
|
||||
bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
||||
GST_DEBUG_OBJECT (self, "Base class state changed returned: %d", bret);
|
||||
if (G_UNLIKELY (bret == GST_STATE_CHANGE_FAILURE))
|
||||
return ret;
|
||||
}
|
||||
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
||||
GST_DEBUG_OBJECT (self, "Base class state changed returned: %d", ret);
|
||||
if (G_UNLIKELY (ret != GST_STATE_CHANGE_SUCCESS))
|
||||
return ret;
|
||||
|
||||
switch (transition) {
|
||||
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
|
||||
GST_DEBUG_OBJECT (self, "State change PLAYING->PAUSED");
|
||||
break;
|
||||
case GST_STATE_CHANGE_PAUSED_TO_READY:{
|
||||
GList *l;
|
||||
|
||||
|
|
@ -855,8 +793,6 @@ gst_stream_synchronizer_change_state (GstElement * element,
|
|||
GST_DEBUG_OBJECT (self, "State change READY->NULL");
|
||||
|
||||
GST_STREAM_SYNCHRONIZER_LOCK (self);
|
||||
while (self->streams)
|
||||
gst_stream_synchronizer_release_stream (self, self->streams->data);
|
||||
self->current_stream_number = 0;
|
||||
GST_STREAM_SYNCHRONIZER_UNLOCK (self);
|
||||
break;
|
||||
|
|
@ -874,10 +810,7 @@ gst_stream_synchronizer_finalize (GObject * object)
|
|||
{
|
||||
GstStreamSynchronizer *self = GST_STREAM_SYNCHRONIZER (object);
|
||||
|
||||
if (self->lock) {
|
||||
g_mutex_free (self->lock);
|
||||
self->lock = NULL;
|
||||
}
|
||||
g_mutex_clear (&self->lock);
|
||||
|
||||
G_OBJECT_CLASS (parent_class)->finalize (object);
|
||||
}
|
||||
|
|
@ -886,7 +819,7 @@ gst_stream_synchronizer_finalize (GObject * object)
|
|||
static void
|
||||
gst_stream_synchronizer_init (GstStreamSynchronizer * self)
|
||||
{
|
||||
self->lock = g_mutex_new ();
|
||||
g_mutex_init (&self->lock);
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
|
|||
|
|
@ -45,7 +45,7 @@ struct _GstStreamSynchronizer
|
|||
GstElement parent;
|
||||
|
||||
/* < private > */
|
||||
GMutex *lock;
|
||||
GMutex lock;
|
||||
gboolean shutdown;
|
||||
|
||||
GList *streams;
|
||||
|
|
|
|||
Loading…
Reference in a new issue