--- /dev/null
+/* GStreamer
+ * Copyright (C) 2010 Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gststreamsynchronizer.h"
+
+GST_DEBUG_CATEGORY_STATIC (stream_synchronizer_debug);
+#define GST_CAT_DEFAULT stream_synchronizer_debug
+
+#define GST_STREAM_SYNCHRONIZER_LOCK(obj) G_STMT_START { \
+ GST_LOG_OBJECT (obj, \
+ "locking from thread %p", \
+ g_thread_self ()); \
+ g_mutex_lock (GST_STREAM_SYNCHRONIZER_CAST(obj)->lock); \
+ GST_LOG_OBJECT (obj, \
+ "locked from thread %p", \
+ g_thread_self ()); \
+} G_STMT_END
+
+#define GST_STREAM_SYNCHRONIZER_UNLOCK(obj) G_STMT_START { \
+ GST_LOG_OBJECT (obj, \
+ "unlocking from thread %p", \
+ g_thread_self ()); \
+ g_mutex_unlock (GST_STREAM_SYNCHRONIZER_CAST(obj)->lock); \
+} G_STMT_END
+
+static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src_%d",
+ GST_PAD_SRC,
+ GST_PAD_SOMETIMES,
+ GST_STATIC_CAPS_ANY);
+static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink_%d",
+ GST_PAD_SINK,
+ GST_PAD_REQUEST,
+ GST_STATIC_CAPS_ANY);
+
+static const gboolean passthrough = TRUE;
+
+GST_BOILERPLATE (GstStreamSynchronizer, gst_stream_synchronizer,
+ GstElement, GST_TYPE_ELEMENT);
+
+typedef struct
+{
+ GstStreamSynchronizer *transform;
+ guint stream_number;
+ GstPad *srcpad;
+ GstPad *sinkpad;
+ GstSegment segment;
+
+ gboolean wait;
+ gboolean new_stream;
+ gboolean drop_discont;
+ gboolean is_eos;
+ gboolean seen_data;
+
+ gint64 running_time_diff;
+} GstStream;
+
+/* Must be called with lock! */
+static GstPad *
+gst_stream_get_other_pad (GstStream * stream, GstPad * pad)
+{
+ if (stream->sinkpad == pad)
+ return gst_object_ref (stream->srcpad);
+ else if (stream->srcpad == pad)
+ return gst_object_ref (stream->sinkpad);
+
+ return NULL;
+}
+
+static GstPad *
+gst_stream_get_other_pad_from_pad (GstPad * pad)
+{
+ GstStreamSynchronizer *self =
+ GST_STREAM_SYNCHRONIZER (gst_pad_get_parent (pad));
+ GstStream *stream;
+ GstPad *opad = NULL;
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ stream = gst_pad_get_element_private (pad);
+ if (!stream)
+ goto out;
+
+ opad = gst_stream_get_other_pad (stream, pad);
+
+out:
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ gst_object_unref (self);
+
+ if (!opad)
+ GST_WARNING_OBJECT (pad, "Trying to get other pad after releasing");
+
+ return opad;
+}
+
+/* Generic pad functions */
+static GstIterator *
+gst_stream_synchronizer_iterate_internal_links (GstPad * pad)
+{
+ GstIterator *it = NULL;
+ GstPad *opad;
+
+ opad = gst_stream_get_other_pad_from_pad (pad);
+ if (opad) {
+ it = gst_iterator_new_single (GST_TYPE_PAD, opad,
+ (GstCopyFunction) gst_object_ref, (GFreeFunc) gst_object_unref);
+ gst_object_unref (opad);
+ }
+
+ return it;
+}
+
+static gboolean
+gst_stream_synchronizer_query (GstPad * pad, GstQuery * query)
+{
+ GstPad *opad;
+ gboolean ret = FALSE;
+
+ GST_LOG_OBJECT (pad, "Handling query %s", GST_QUERY_TYPE_NAME (query));
+
+ opad = gst_stream_get_other_pad_from_pad (pad);
+ if (opad) {
+ ret = gst_pad_peer_query (opad, query);
+ gst_object_unref (opad);
+ }
+
+ return ret;
+}
+
+static GstCaps *
+gst_stream_synchronizer_getcaps (GstPad * pad)
+{
+ GstPad *opad;
+ GstCaps *ret = NULL;
+
+ opad = gst_stream_get_other_pad_from_pad (pad);
+ if (opad) {
+ ret = gst_pad_peer_get_caps (opad);
+ gst_object_unref (opad);
+ }
+
+ if (ret == NULL)
+ ret = gst_caps_new_any ();
+
+ GST_LOG_OBJECT (pad, "Returning caps: %" GST_PTR_FORMAT, ret);
+
+ return ret;
+}
+
+static gboolean
+gst_stream_synchronizer_acceptcaps (GstPad * pad, GstCaps * caps)
+{
+ GstPad *opad;
+ gboolean ret = FALSE;
+
+ opad = gst_stream_get_other_pad_from_pad (pad);
+ if (opad) {
+ ret = gst_pad_peer_accept_caps (opad, caps);
+ gst_object_unref (opad);
+ }
+
+ GST_LOG_OBJECT (pad, "Caps%s accepted: %" GST_PTR_FORMAT, (ret ? "" : " not"),
+ caps);
+
+ return ret;
+}
+
+/* srcpad functions */
+static gboolean
+gst_stream_synchronizer_src_event (GstPad * pad, GstEvent * event)
+{
+ GstStreamSynchronizer *self =
+ GST_STREAM_SYNCHRONIZER (gst_pad_get_parent (pad));
+ GstPad *opad;
+ gboolean ret = FALSE;
+
+ if (passthrough)
+ goto skip_adjustments;
+
+ GST_LOG_OBJECT (pad, "Handling event %s: %" GST_PTR_FORMAT,
+ GST_EVENT_TYPE_NAME (event), event->structure);
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_QOS:{
+ gdouble proportion;
+ GstClockTimeDiff diff;
+ GstClockTime timestamp;
+ gint64 running_time_diff;
+ GstStream *stream;
+
+ gst_event_parse_qos (event, &proportion, &diff, ×tamp);
+ gst_event_unref (event);
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ stream = gst_pad_get_element_private (pad);
+ if (stream)
+ running_time_diff = stream->running_time_diff;
+ else
+ running_time_diff = -1;
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+
+ if (running_time_diff == -1) {
+ GST_WARNING_OBJECT (pad, "QOS event before group start");
+ goto out;
+ } else if (timestamp < running_time_diff) {
+ GST_DEBUG_OBJECT (pad, "QOS event from previous group");
+ goto out;
+ }
+
+ GST_LOG_OBJECT (pad,
+ "Adjusting QOS event: %" GST_TIME_FORMAT " - %" GST_TIME_FORMAT " = %"
+ GST_TIME_FORMAT, GST_TIME_ARGS (timestamp),
+ GST_TIME_ARGS (running_time_diff),
+ GST_TIME_ARGS (timestamp - running_time_diff));
+
+ timestamp -= running_time_diff;
+
+ /* That case is invalid for QoS events */
+ if (diff < 0 && -diff > timestamp) {
+ GST_DEBUG_OBJECT (pad, "QOS event from previous group");
+ ret = TRUE;
+ goto out;
+ }
+
+ event = gst_event_new_qos (proportion, diff, timestamp);
+ break;
+ }
+ default:
+ break;
+ }
+
+skip_adjustments:
+
+ opad = gst_stream_get_other_pad_from_pad (pad);
+ if (opad) {
+ ret = gst_pad_push_event (opad, event);
+ gst_object_unref (opad);
+ }
+
+out:
+ gst_object_unref (self);
+
+ return ret;
+}
+
+/* sinkpad functions */
+static gboolean
+gst_stream_synchronizer_sink_event (GstPad * pad, GstEvent * event)
+{
+ GstStreamSynchronizer *self =
+ GST_STREAM_SYNCHRONIZER (gst_pad_get_parent (pad));
+ GstPad *opad;
+ gboolean ret = FALSE;
+
+ if (passthrough)
+ goto skip_adjustments;
+
+ GST_LOG_OBJECT (pad, "Handling event %s: %" GST_PTR_FORMAT,
+ GST_EVENT_TYPE_NAME (event), event->structure);
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_SINK_MESSAGE:{
+ GstMessage *message;
+
+ gst_event_parse_sink_message (event, &message);
+ if (message->structure
+ && gst_structure_has_name (message->structure,
+ "playbin2-stream-changed")) {
+ GstStream *stream;
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ stream = gst_pad_get_element_private (pad);
+ if (stream) {
+ GList *l;
+ gboolean all_wait = TRUE;
+
+ GST_DEBUG_OBJECT (pad, "Stream %d changed", stream->stream_number);
+
+ stream->is_eos = FALSE;
+ stream->wait = TRUE;
+ stream->new_stream = TRUE;
+
+ for (l = self->streams; l; l = l->next) {
+ GstStream *ostream = l->data;
+
+ all_wait = all_wait && ostream->wait;
+ if (!all_wait)
+ break;
+ }
+ if (all_wait) {
+ gint64 last_stop = 0;
+
+ GST_DEBUG_OBJECT (self, "All streams have changed -- unblocking");
+
+ for (l = self->streams; l; l = l->next) {
+ GstStream *ostream = l->data;
+ gint64 stop_running_time;
+ gint64 last_stop_running_time;
+
+ ostream->wait = FALSE;
+
+ stop_running_time =
+ gst_segment_to_running_time (&ostream->segment,
+ GST_FORMAT_TIME, ostream->segment.stop);
+ last_stop_running_time =
+ gst_segment_to_running_time (&ostream->segment,
+ GST_FORMAT_TIME, ostream->segment.last_stop);
+ last_stop =
+ MAX (last_stop, MAX (stop_running_time,
+ last_stop_running_time));
+ }
+ last_stop = MAX (0, last_stop);
+ self->group_start_time = MAX (self->group_start_time, last_stop);
+
+ GST_DEBUG_OBJECT (self, "New group start time: %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (self->group_start_time));
+
+ g_cond_broadcast (self->stream_finish_cond);
+ }
+ }
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ }
+ gst_message_unref (message);
+ break;
+ }
+ case GST_EVENT_NEWSEGMENT:{
+ GstStream *stream;
+ gboolean update;
+ gdouble rate, applied_rate;
+ GstFormat format;
+ gint64 start, stop, position;
+
+ gst_event_parse_new_segment_full (event,
+ &update, &rate, &applied_rate, &format, &start, &stop, &position);
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ stream = gst_pad_get_element_private (pad);
+ if (stream) {
+ if (stream->wait) {
+ GST_DEBUG_OBJECT (pad, "Stream %d is waiting", stream->stream_number);
+ g_cond_wait (self->stream_finish_cond, self->lock);
+ stream = gst_pad_get_element_private (pad);
+ if (stream)
+ stream->wait = FALSE;
+ }
+ }
+
+ if (self->shutdown) {
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ gst_event_unref (event);
+ goto done;
+ }
+
+ if (stream && format == GST_FORMAT_TIME) {
+ if (stream->new_stream) {
+ gint64 last_stop_running_time = 0;
+ gint64 stop_running_time = 0;
+
+ if (stream->segment.format == GST_FORMAT_TIME) {
+ last_stop_running_time =
+ gst_segment_to_running_time (&stream->segment, GST_FORMAT_TIME,
+ stream->segment.last_stop);
+ last_stop_running_time = MAX (last_stop_running_time, 0);
+ stop_running_time =
+ gst_segment_to_running_time (&stream->segment, GST_FORMAT_TIME,
+ stream->segment.stop);
+ stop_running_time = MAX (last_stop_running_time, 0);
+
+ if (stop_running_time != last_stop_running_time) {
+ GST_WARNING_OBJECT (pad,
+ "Gap between last_stop and segment stop: %" GST_TIME_FORMAT
+ " != %" GST_TIME_FORMAT, GST_TIME_ARGS (stop_running_time),
+ GST_TIME_ARGS (last_stop_running_time));
+ }
+
+ if (stop_running_time < last_stop_running_time) {
+ GST_DEBUG_OBJECT (pad, "Updating stop position");
+ gst_pad_push_event (stream->srcpad,
+ gst_event_new_new_segment_full (TRUE, stream->segment.rate,
+ stream->segment.applied_rate, GST_FORMAT_TIME,
+ stream->segment.start, stream->segment.last_stop,
+ stream->segment.time));
+ gst_segment_set_newsegment_full (&stream->segment, TRUE,
+ stream->segment.rate, stream->segment.applied_rate,
+ GST_FORMAT_TIME, stream->segment.start,
+ stream->segment.last_stop, stream->segment.time);
+ }
+ stop_running_time = MAX (stop_running_time, last_stop_running_time);
+ GST_DEBUG_OBJECT (pad,
+ "Stop running time of last group: %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (stop_running_time));
+ }
+ stream->new_stream = FALSE;
+ stream->drop_discont = TRUE;
+
+ if (stop_running_time < self->group_start_time) {
+ gint64 diff = self->group_start_time - stop_running_time;
+
+ GST_DEBUG_OBJECT (pad,
+ "Advancing running time for other streams by: %"
+ GST_TIME_FORMAT, GST_TIME_ARGS (diff));
+ gst_pad_push_event (stream->srcpad,
+ gst_event_new_new_segment_full (FALSE, 1.0, 1.0,
+ GST_FORMAT_TIME, 0, diff, 0));
+ gst_segment_set_newsegment_full (&stream->segment, FALSE, 1.0, 1.0,
+ GST_FORMAT_TIME, 0, diff, 0);
+ }
+ }
+
+ GST_DEBUG_OBJECT (pad, "Segment was: %" GST_SEGMENT_FORMAT,
+ &stream->segment);
+ gst_segment_set_newsegment_full (&stream->segment, update, rate,
+ applied_rate, format, start, stop, position);
+ GST_DEBUG_OBJECT (pad, "Segment now is: %" GST_SEGMENT_FORMAT,
+ &stream->segment);
+
+ GST_DEBUG_OBJECT (pad, "Stream start running time: %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (stream->segment.accum));
+ stream->running_time_diff = stream->segment.accum;
+ } else if (stream) {
+ GST_WARNING_OBJECT (pad, "Non-TIME segment: %s",
+ gst_format_get_name (format));
+ gst_segment_init (&stream->segment, GST_FORMAT_UNDEFINED);
+ }
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ break;
+ }
+ case GST_EVENT_FLUSH_STOP:{
+ GstStream *stream;
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ stream = gst_pad_get_element_private (pad);
+ if (stream) {
+ GST_DEBUG_OBJECT (pad, "Resetting segment for stream %d",
+ stream->stream_number);
+ gst_segment_init (&stream->segment, GST_FORMAT_UNDEFINED);
+
+ stream->is_eos = FALSE;
+ stream->wait = FALSE;
+ stream->new_stream = FALSE;
+ stream->drop_discont = FALSE;
+ stream->seen_data = FALSE;
+ }
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ break;
+ }
+ case GST_EVENT_EOS:{
+ GstStream *stream;
+ GList *l;
+ gboolean all_eos = TRUE;
+ gboolean seen_data;
+ GSList *pads = NULL;
+ GstPad *srcpad;
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ stream = gst_pad_get_element_private (pad);
+ if (!stream) {
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ GST_WARNING_OBJECT (pad, "EOS for unknown stream");
+ break;
+ }
+
+ GST_DEBUG_OBJECT (pad, "Have EOS for stream %d", stream->stream_number);
+ stream->is_eos = TRUE;
+
+ seen_data = stream->seen_data;
+ srcpad = gst_object_ref (stream->srcpad);
+
+ for (l = self->streams; l; l = l->next) {
+ GstStream *ostream = l->data;
+
+ all_eos = all_eos && ostream->is_eos;
+ if (!all_eos)
+ break;
+ }
+
+ if (all_eos) {
+ GST_DEBUG_OBJECT (self, "All streams are EOS -- forwarding");
+ for (l = self->streams; l; l = l->next) {
+ GstStream *ostream = l->data;
+ /* local snapshot of current pads */
+ gst_object_ref (ostream->srcpad);
+ pads = g_slist_prepend (pads, ostream->srcpad);
+ }
+ }
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ /* drop lock when sending eos, which may block in e.g. preroll */
+ if (pads) {
+ GstPad *pad;
+ GSList *epad;
+
+ ret = TRUE;
+ epad = pads;
+ while (epad) {
+ pad = epad->data;
+ GST_DEBUG_OBJECT (pad, "Pushing EOS");
+ ret = ret && gst_pad_push_event (pad, gst_event_new_eos ());
+ gst_object_unref (pad);
+ epad = g_slist_next (epad);
+ }
+ g_slist_free (pads);
+ } else {
+ /* if EOS, but no data has passed, then send something to replace EOS
+ * for preroll purposes */
+ if (!seen_data) {
+ GstBuffer *buf = gst_buffer_new ();
+
+ GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_PREROLL);
+ gst_pad_push (srcpad, buf);
+ }
+ }
+ gst_object_unref (srcpad);
+ goto done;
+ break;
+ }
+ default:
+ break;
+ }
+
+skip_adjustments:
+
+ opad = gst_stream_get_other_pad_from_pad (pad);
+ if (opad) {
+ ret = gst_pad_push_event (opad, event);
+ gst_object_unref (opad);
+ }
+
+done:
+ gst_object_unref (self);
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_stream_synchronizer_sink_bufferalloc (GstPad * pad, guint64 offset,
+ guint size, GstCaps * caps, GstBuffer ** buf)
+{
+ GstPad *opad;
+ GstFlowReturn ret = GST_FLOW_ERROR;
+
+ GST_LOG_OBJECT (pad, "Allocating buffer: size=%u", size);
+
+ opad = gst_stream_get_other_pad_from_pad (pad);
+ if (opad) {
+ ret = gst_pad_alloc_buffer (opad, offset, size, caps, buf);
+ gst_object_unref (opad);
+ }
+
+ GST_LOG_OBJECT (pad, "Allocation: %s", gst_flow_get_name (ret));
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_stream_synchronizer_sink_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstStreamSynchronizer *self =
+ GST_STREAM_SYNCHRONIZER (gst_pad_get_parent (pad));
+ GstPad *opad;
+ GstFlowReturn ret = GST_FLOW_ERROR;
+ GstStream *stream;
+ GstClockTime timestamp = GST_CLOCK_TIME_NONE;
+ GstClockTime timestamp_end = GST_CLOCK_TIME_NONE;
+
+ if (passthrough) {
+ opad = gst_stream_get_other_pad_from_pad (pad);
+ if (opad) {
+ ret = gst_pad_push (opad, buffer);
+ gst_object_unref (opad);
+ }
+ goto done;
+ }
+
+ GST_LOG_OBJECT (pad, "Handling buffer %p: size=%u, timestamp=%"
+ GST_TIME_FORMAT " duration=%" GST_TIME_FORMAT
+ " offset=%" G_GUINT64_FORMAT " offset_end=%" G_GUINT64_FORMAT,
+ buffer, GST_BUFFER_SIZE (buffer),
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)),
+ GST_BUFFER_OFFSET (buffer), GST_BUFFER_OFFSET_END (buffer));
+
+ timestamp = GST_BUFFER_TIMESTAMP (buffer);
+ if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer)
+ && GST_BUFFER_DURATION_IS_VALID (buffer))
+ timestamp_end = timestamp + GST_BUFFER_DURATION (buffer);
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ stream = gst_pad_get_element_private (pad);
+
+ stream->seen_data = TRUE;
+ if (stream && stream->drop_discont) {
+ buffer = gst_buffer_make_metadata_writable (buffer);
+ GST_BUFFER_FLAG_UNSET (buffer, GST_BUFFER_FLAG_DISCONT);
+ stream->drop_discont = FALSE;
+ }
+
+ if (stream && stream->segment.format == GST_FORMAT_TIME
+ && GST_CLOCK_TIME_IS_VALID (timestamp)) {
+ GST_LOG_OBJECT (pad,
+ "Updating last-stop from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (stream->segment.last_stop), GST_TIME_ARGS (timestamp));
+ gst_segment_set_last_stop (&stream->segment, GST_FORMAT_TIME, timestamp);
+ }
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+
+ opad = gst_stream_get_other_pad_from_pad (pad);
+ if (opad) {
+ ret = gst_pad_push (opad, buffer);
+ gst_object_unref (opad);
+ }
+
+ GST_LOG_OBJECT (pad, "Push returned: %s", gst_flow_get_name (ret));
+ if (ret == GST_FLOW_OK) {
+ GList *l;
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ stream = gst_pad_get_element_private (pad);
+ if (stream && stream->segment.format == GST_FORMAT_TIME
+ && GST_CLOCK_TIME_IS_VALID (timestamp_end)) {
+ GST_LOG_OBJECT (pad,
+ "Updating last-stop from %" GST_TIME_FORMAT " to %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (stream->segment.last_stop),
+ GST_TIME_ARGS (timestamp_end));
+ gst_segment_set_last_stop (&stream->segment, GST_FORMAT_TIME,
+ timestamp_end);
+ }
+
+ /* Advance EOS streams if necessary. For non-EOS
+ * streams the demuxers should already do this! */
+ for (l = self->streams; l; l = l->next) {
+ GstStream *ostream = l->data;
+ gint64 last_stop;
+
+ if (!ostream->is_eos || ostream->segment.format != GST_FORMAT_TIME)
+ continue;
+
+ if (ostream->segment.last_stop != -1)
+ last_stop = ostream->segment.last_stop;
+ else
+ last_stop = ostream->segment.start;
+
+ /* Is there a 1 second lag? */
+ if (last_stop != -1 && last_stop + GST_SECOND < timestamp_end) {
+ gint64 new_start, new_stop;
+
+ new_start = timestamp_end - GST_SECOND;
+ if (ostream->segment.stop == -1)
+ new_stop = -1;
+ else
+ new_stop = MAX (new_start, ostream->segment.stop);
+
+ GST_DEBUG_OBJECT (ostream->sinkpad,
+ "Advancing stream %u from %" GST_TIME_FORMAT " to %"
+ GST_TIME_FORMAT, ostream->stream_number, GST_TIME_ARGS (last_stop),
+ GST_TIME_ARGS (new_start));
+
+ gst_pad_push_event (ostream->srcpad,
+ gst_event_new_new_segment_full (TRUE, ostream->segment.rate,
+ ostream->segment.applied_rate, ostream->segment.format,
+ new_start, new_stop, new_start));
+ gst_segment_set_newsegment_full (&ostream->segment, TRUE,
+ ostream->segment.rate, ostream->segment.applied_rate,
+ ostream->segment.format, new_start, new_stop, new_start);
+ gst_segment_set_last_stop (&ostream->segment, GST_FORMAT_TIME,
+ new_start);
+ }
+ }
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ }
+
+done:
+
+ gst_object_unref (self);
+
+ return ret;
+}
+
+/* GstElement vfuncs */
+static GstPad *
+gst_stream_synchronizer_request_new_pad (GstElement * element,
+ GstPadTemplate * temp, const gchar * name)
+{
+ GstStreamSynchronizer *self = GST_STREAM_SYNCHRONIZER (element);
+ GstStream *stream;
+ gchar *tmp;
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ GST_DEBUG_OBJECT (self, "Requesting new pad for stream %d",
+ self->current_stream_number);
+
+ stream = g_slice_new0 (GstStream);
+ stream->transform = self;
+ stream->stream_number = self->current_stream_number;
+
+ tmp = g_strdup_printf ("sink_%d", self->current_stream_number);
+ stream->sinkpad = gst_pad_new_from_static_template (&sinktemplate, tmp);
+ g_free (tmp);
+ gst_pad_set_element_private (stream->sinkpad, stream);
+ gst_pad_set_iterate_internal_links_function (stream->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_iterate_internal_links));
+ gst_pad_set_query_function (stream->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_query));
+ gst_pad_set_getcaps_function (stream->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_getcaps));
+ gst_pad_set_acceptcaps_function (stream->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_acceptcaps));
+ gst_pad_set_event_function (stream->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_sink_event));
+ gst_pad_set_chain_function (stream->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_sink_chain));
+ gst_pad_set_bufferalloc_function (stream->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_sink_bufferalloc));
+
+ tmp = g_strdup_printf ("src_%d", self->current_stream_number);
+ stream->srcpad = gst_pad_new_from_static_template (&srctemplate, tmp);
+ g_free (tmp);
+ gst_pad_set_element_private (stream->srcpad, stream);
+ gst_pad_set_iterate_internal_links_function (stream->srcpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_iterate_internal_links));
+ gst_pad_set_query_function (stream->srcpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_query));
+ gst_pad_set_getcaps_function (stream->srcpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_getcaps));
+ gst_pad_set_acceptcaps_function (stream->srcpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_acceptcaps));
+ gst_pad_set_event_function (stream->srcpad,
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_src_event));
+
+ gst_segment_init (&stream->segment, GST_FORMAT_UNDEFINED);
+
+ self->streams = g_list_prepend (self->streams, stream);
+ self->current_stream_number++;
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+
+ /* Add pads and activate unless we're going to NULL */
+ g_static_rec_mutex_lock (GST_STATE_GET_LOCK (self));
+ if (GST_STATE_TARGET (self) != GST_STATE_NULL) {
+ gst_pad_set_active (stream->srcpad, TRUE);
+ gst_pad_set_active (stream->sinkpad, TRUE);
+ }
+ gst_element_add_pad (GST_ELEMENT_CAST (self), stream->srcpad);
+ gst_element_add_pad (GST_ELEMENT_CAST (self), stream->sinkpad);
+ g_static_rec_mutex_unlock (GST_STATE_GET_LOCK (self));
+
+ return stream->sinkpad;
+}
+
+/* Must be called with lock! */
+static void
+gst_stream_synchronizer_release_stream (GstStreamSynchronizer * self,
+ GstStream * stream)
+{
+ GList *l;
+
+ GST_DEBUG_OBJECT (self, "Releasing stream %d", stream->stream_number);
+
+ for (l = self->streams; l; l = l->next) {
+ if (l->data == stream) {
+ self->streams = g_list_delete_link (self->streams, l);
+ break;
+ }
+ }
+ g_assert (l != NULL);
+
+ /* we can drop the lock, since stream exists now only local.
+ * Moreover, we should drop, to prevent deadlock with STREAM_LOCK
+ * (due to reverse lock order) when deactivating pads */
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+
+ gst_pad_set_element_private (stream->srcpad, NULL);
+ gst_pad_set_element_private (stream->sinkpad, NULL);
+ gst_pad_set_active (stream->srcpad, FALSE);
+ gst_element_remove_pad (GST_ELEMENT_CAST (self), stream->srcpad);
+ gst_pad_set_active (stream->sinkpad, FALSE);
+ gst_element_remove_pad (GST_ELEMENT_CAST (self), stream->sinkpad);
+
+ if (stream->segment.format == GST_FORMAT_TIME) {
+ gint64 stop_running_time;
+ gint64 last_stop_running_time;
+
+ stop_running_time =
+ gst_segment_to_running_time (&stream->segment, GST_FORMAT_TIME,
+ stream->segment.stop);
+ last_stop_running_time =
+ gst_segment_to_running_time (&stream->segment, GST_FORMAT_TIME,
+ stream->segment.last_stop);
+ stop_running_time = MAX (stop_running_time, last_stop_running_time);
+
+ GST_DEBUG_OBJECT (stream->sinkpad,
+ "Stop running time was: %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (stop_running_time));
+
+ self->group_start_time = MAX (self->group_start_time, stop_running_time);
+ }
+
+ g_slice_free (GstStream, stream);
+
+ /* NOTE: In theory we have to check here if all streams
+ * are EOS but the one that was removed wasn't and then
+ * send EOS downstream. But due to the way how playsink
+ * works this is not necessary and will only cause problems
+ * for gapless playback. playsink will only add/remove pads
+ * when it's reconfigured, which happens when the streams
+ * change
+ */
+
+ /* lock for good measure, since the caller had it */
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+}
+
+static void
+gst_stream_synchronizer_release_pad (GstElement * element, GstPad * pad)
+{
+ GstStreamSynchronizer *self = GST_STREAM_SYNCHRONIZER (element);
+ GstStream *stream;
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ stream = gst_pad_get_element_private (pad);
+ if (stream) {
+ g_assert (stream->sinkpad == pad);
+
+ gst_stream_synchronizer_release_stream (self, stream);
+ }
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+}
+
+static GstStateChangeReturn
+gst_stream_synchronizer_change_state (GstElement * element,
+ GstStateChange transition)
+{
+ GstStreamSynchronizer *self = GST_STREAM_SYNCHRONIZER (element);
+ GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_NULL_TO_READY:
+ GST_DEBUG_OBJECT (self, "State change NULL->READY");
+ self->shutdown = FALSE;
+ break;
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ GST_DEBUG_OBJECT (self, "State change READY->PAUSED");
+ 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:
+ GST_DEBUG_OBJECT (self, "State change READY->NULL");
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ g_cond_broadcast (self->stream_finish_cond);
+ self->shutdown = TRUE;
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ default:
+ 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;
+ }
+
+ 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;
+
+ GST_DEBUG_OBJECT (self, "State change PAUSED->READY");
+ self->group_start_time = 0;
+
+ GST_STREAM_SYNCHRONIZER_LOCK (self);
+ for (l = self->streams; l; l = l->next) {
+ GstStream *stream = l->data;
+
+ gst_segment_init (&stream->segment, GST_FORMAT_UNDEFINED);
+ stream->wait = FALSE;
+ stream->new_stream = FALSE;
+ stream->drop_discont = FALSE;
+ stream->is_eos = FALSE;
+ }
+ GST_STREAM_SYNCHRONIZER_UNLOCK (self);
+ break;
+ }
+ case GST_STATE_CHANGE_READY_TO_NULL:{
+ 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;
+ }
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/* GObject vfuncs */
+static void
+gst_stream_synchronizer_finalize (GObject * object)
+{
+ GstStreamSynchronizer *self = GST_STREAM_SYNCHRONIZER (object);
+
+ if (self->lock) {
+ g_mutex_free (self->lock);
+ self->lock = NULL;
+ }
+
+ if (self->stream_finish_cond) {
+ g_cond_free (self->stream_finish_cond);
+ self->stream_finish_cond = NULL;
+ }
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+/* GObject type initialization */
+static void
+gst_stream_synchronizer_init (GstStreamSynchronizer * self,
+ GstStreamSynchronizerClass * klass)
+{
+ self->lock = g_mutex_new ();
+ self->stream_finish_cond = g_cond_new ();
+}
+
+static void
+gst_stream_synchronizer_base_init (gpointer g_class)
+{
+ GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&srctemplate));
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&sinktemplate));
+
+ gst_element_class_set_details_simple (gstelement_class,
+ "Stream Synchronizer", "Generic",
+ "Synchronizes a group of streams to have equal durations and starting points",
+ "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
+}
+
+static void
+gst_stream_synchronizer_class_init (GstStreamSynchronizerClass * klass)
+{
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+ GstElementClass *element_class = (GstElementClass *) klass;
+
+ GST_DEBUG_CATEGORY_INIT (stream_synchronizer_debug,
+ "streamsynchronizer", 0, "Stream Synchronizer");
+
+ gobject_class->finalize = gst_stream_synchronizer_finalize;
+
+ element_class->change_state =
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_change_state);
+ element_class->request_new_pad =
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_request_new_pad);
+ element_class->release_pad =
+ GST_DEBUG_FUNCPTR (gst_stream_synchronizer_release_pad);
+}
projects / mafwsubrenderer / blobdiff