/* GStreamer concat element
*
* Copyright (c) 2014 Sebastian Dröge <sebastian@centricular.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
/**
* SECTION:element-concat
* @title: concat
* @see_also: #GstFunnel
*
* Concatenates streams together to one continous stream.
*
* All streams but the current one are blocked until the current one
* finished with %GST_EVENT_EOS. Then the next stream is enabled, while
* keeping the running time continous for %GST_FORMAT_TIME segments or
* keeping the segment continous for %GST_FORMAT_BYTES segments.
*
* Streams are switched in the order in which the sinkpads were requested.
*
* By default, the stream segment's base values are adjusted to ensure
* the segment transitions between streams are continuous. In some cases,
* it may be desirable to turn off these adjustments (for example, because
* another downstream element like a streamsynchronizer adjusts the base
* values on its own). The adjust-base property can be used for this purpose.
*
* ## Example launch line
* |[
* gst-launch-1.0 concat name=c ! xvimagesink videotestsrc num-buffers=100 ! c. videotestsrc num-buffers=100 pattern=ball ! c.
* ]| Plays two video streams one after another.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstconcat.h"
GST_DEBUG_CATEGORY_STATIC (gst_concat_debug);
#define GST_CAT_DEFAULT gst_concat_debug
G_GNUC_INTERNAL GType gst_concat_pad_get_type (void);
#define GST_TYPE_CONCAT_PAD (gst_concat_pad_get_type())
#define GST_CONCAT_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_CONCAT_PAD, GstConcatPad))
#define GST_CONCAT_PAD_CAST(obj) ((GstConcatPad *)(obj))
#define GST_CONCAT_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_CONCAT_PAD, GstConcatPadClass))
#define GST_IS_CONCAT_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_CONCAT_PAD))
#define GST_IS_CONCAT_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_CONCAT_PAD))
typedef struct _GstConcatPad GstConcatPad;
typedef struct _GstConcatPadClass GstConcatPadClass;
struct _GstConcatPad
{
GstPad parent;
GstSegment segment;
/* Protected by the concat lock */
gboolean flushing;
};
struct _GstConcatPadClass
{
GstPadClass parent;
};
G_DEFINE_TYPE (GstConcatPad, gst_concat_pad, GST_TYPE_PAD);
static void
gst_concat_pad_class_init (GstConcatPadClass * klass)
{
}
static void
gst_concat_pad_init (GstConcatPad * self)
{
gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
self->flushing = FALSE;
}
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
enum
{
PROP_0,
PROP_ACTIVE_PAD,
PROP_ADJUST_BASE
};
#define DEFAULT_ADJUST_BASE TRUE
#define _do_init \
GST_DEBUG_CATEGORY_INIT (gst_concat_debug, "concat", 0, "concat element");
#define gst_concat_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstConcat, gst_concat, GST_TYPE_ELEMENT, _do_init);
static void gst_concat_dispose (GObject * object);
static void gst_concat_finalize (GObject * object);
static void gst_concat_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static void gst_concat_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_concat_change_state (GstElement * element,
GstStateChange transition);
static GstPad *gst_concat_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name, const GstCaps * caps);
static void gst_concat_release_pad (GstElement * element, GstPad * pad);
static GstFlowReturn gst_concat_sink_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static gboolean gst_concat_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_concat_sink_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean gst_concat_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_concat_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static gboolean gst_concat_switch_pad (GstConcat * self);
static void gst_concat_notify_active_pad (GstConcat * self);
static GParamSpec *pspec_active_pad = NULL;
static void
gst_concat_class_init (GstConcatClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_concat_dispose);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_concat_finalize);
gobject_class->get_property = gst_concat_get_property;
gobject_class->set_property = gst_concat_set_property;
pspec_active_pad = g_param_spec_object ("active-pad", "Active pad",
"Currently active src pad", GST_TYPE_PAD, G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS);
g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
pspec_active_pad);
g_object_class_install_property (gobject_class, PROP_ADJUST_BASE,
g_param_spec_boolean ("adjust-base", "Adjust segment base",
"Adjust the base value of segments to ensure they are adjacent",
DEFAULT_ADJUST_BASE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gst_element_class_set_static_metadata (gstelement_class,
"Concat", "Generic", "Concatenate multiple streams",
"Sebastian Dröge <sebastian@centricular.com>");
gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
gst_element_class_add_static_pad_template (gstelement_class, &src_template);
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_concat_request_new_pad);
gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_concat_release_pad);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_concat_change_state);
}
static void
gst_concat_init (GstConcat * self)
{
g_mutex_init (&self->lock);
g_cond_init (&self->cond);
self->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_set_event_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_concat_src_event));
gst_pad_set_query_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_concat_src_query));
gst_pad_use_fixed_caps (self->srcpad);
gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
self->adjust_base = DEFAULT_ADJUST_BASE;
}
static void
gst_concat_dispose (GObject * object)
{
GstConcat *self = GST_CONCAT (object);
GList *item;
gst_object_replace ((GstObject **) & self->current_sinkpad, NULL);
restart:
for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) {
GstPad *pad = GST_PAD (item->data);
if (GST_PAD_IS_SINK (pad)) {
gst_element_release_request_pad (GST_ELEMENT (object), pad);
goto restart;
}
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_concat_finalize (GObject * object)
{
GstConcat *self = GST_CONCAT (object);
g_mutex_clear (&self->lock);
g_cond_clear (&self->cond);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_concat_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstConcat *self = GST_CONCAT (object);
switch (prop_id) {
case PROP_ACTIVE_PAD:{
g_mutex_lock (&self->lock);
g_value_set_object (value, self->current_sinkpad);
g_mutex_unlock (&self->lock);
break;
}
case PROP_ADJUST_BASE:{
g_mutex_lock (&self->lock);
g_value_set_boolean (value, self->adjust_base);
g_mutex_unlock (&self->lock);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_concat_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstConcat *self = GST_CONCAT (object);
switch (prop_id) {
case PROP_ADJUST_BASE:{
g_mutex_lock (&self->lock);
self->adjust_base = g_value_get_boolean (value);
g_mutex_unlock (&self->lock);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstPad *
gst_concat_request_new_pad (GstElement * element, GstPadTemplate * templ,
const gchar * name, const GstCaps * caps)
{
GstConcat *self = GST_CONCAT (element);
GstPad *sinkpad;
gchar *pad_name;
gboolean do_notify = FALSE;
GST_DEBUG_OBJECT (element, "requesting pad");
g_mutex_lock (&self->lock);
pad_name = g_strdup_printf ("sink_%u", self->pad_count);
self->pad_count++;
g_mutex_unlock (&self->lock);
sinkpad = GST_PAD_CAST (g_object_new (GST_TYPE_CONCAT_PAD,
"name", pad_name, "direction", templ->direction, "template", templ,
NULL));
g_free (pad_name);
gst_pad_set_chain_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_concat_sink_chain));
gst_pad_set_event_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_concat_sink_event));
gst_pad_set_query_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_concat_sink_query));
GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_ALLOCATION);
gst_pad_set_active (sinkpad, TRUE);
g_mutex_lock (&self->lock);
self->sinkpads = g_list_prepend (self->sinkpads, gst_object_ref (sinkpad));
if (!self->current_sinkpad) {
do_notify = TRUE;
self->current_sinkpad = gst_object_ref (sinkpad);
}
g_mutex_unlock (&self->lock);
gst_element_add_pad (element, sinkpad);
if (do_notify)
gst_concat_notify_active_pad (self);
return sinkpad;
}
static void
gst_concat_release_pad (GstElement * element, GstPad * pad)
{
GstConcat *self = GST_CONCAT (element);
GstConcatPad *spad = GST_CONCAT_PAD_CAST (pad);
GList *l;
gboolean current_pad_removed = FALSE;
gboolean eos = FALSE;
gboolean do_notify = FALSE;
GST_DEBUG_OBJECT (self, "releasing pad");
g_mutex_lock (&self->lock);
spad->flushing = TRUE;
g_cond_broadcast (&self->cond);
g_mutex_unlock (&self->lock);
gst_pad_set_active (pad, FALSE);
/* Now the pad is definitely not running anymore */
g_mutex_lock (&self->lock);
if (self->current_sinkpad == GST_PAD_CAST (spad)) {
eos = !gst_concat_switch_pad (self);
current_pad_removed = TRUE;
do_notify = TRUE;
}
for (l = self->sinkpads; l; l = l->next) {
if ((gpointer) spad == l->data) {
gst_object_unref (spad);
self->sinkpads = g_list_delete_link (self->sinkpads, l);
break;
}
}
g_mutex_unlock (&self->lock);
gst_element_remove_pad (GST_ELEMENT_CAST (self), pad);
if (do_notify)
gst_concat_notify_active_pad (self);
if (GST_STATE (self) > GST_STATE_READY) {
if (current_pad_removed && !eos)
gst_element_post_message (GST_ELEMENT_CAST (self),
gst_message_new_duration_changed (GST_OBJECT_CAST (self)));
/* FIXME: Sending EOS from application thread */
if (eos)
gst_pad_push_event (self->srcpad, gst_event_new_eos ());
}
}
/* Returns FALSE if flushing
* Must be called from the pad's streaming thread
*/
static gboolean
gst_concat_pad_wait (GstConcatPad * spad, GstConcat * self)
{
g_mutex_lock (&self->lock);
if (spad->flushing) {
g_mutex_unlock (&self->lock);
GST_DEBUG_OBJECT (spad, "Flushing");
return FALSE;
}
while (spad != GST_CONCAT_PAD_CAST (self->current_sinkpad)) {
GST_TRACE_OBJECT (spad, "Not the current sinkpad - waiting");
if (self->current_sinkpad == NULL && g_list_length (self->sinkpads) == 1) {
GST_LOG_OBJECT (spad, "Sole pad waiting, switching");
/* If we are the only sinkpad, take active pad ownership */
self->current_sinkpad = gst_object_ref (self->sinkpads->data);
break;
}
g_cond_wait (&self->cond, &self->lock);
if (spad->flushing) {
g_mutex_unlock (&self->lock);
GST_DEBUG_OBJECT (spad, "Flushing");
return FALSE;
}
}
/* This pad can only become not the current sinkpad from
* a) This streaming thread (we hold the stream lock)
* b) Releasing the pad (takes the stream lock, see above)
*
* Unlocking here is thus safe and we can safely push
* serialized data to our srcpad
*/
GST_DEBUG_OBJECT (spad, "Now the current sinkpad");
g_mutex_unlock (&self->lock);
return TRUE;
}
static GstFlowReturn
gst_concat_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstFlowReturn ret;
GstConcat *self = GST_CONCAT (parent);
GstConcatPad *spad = GST_CONCAT_PAD (pad);
GST_LOG_OBJECT (pad, "received buffer %p", buffer);
if (!gst_concat_pad_wait (spad, self))
return GST_FLOW_FLUSHING;
if (self->last_stop == GST_CLOCK_TIME_NONE)
self->last_stop = spad->segment.start;
if (self->format == GST_FORMAT_TIME) {
GstClockTime start_time = GST_BUFFER_TIMESTAMP (buffer);
GstClockTime end_time = GST_CLOCK_TIME_NONE;
if (start_time != GST_CLOCK_TIME_NONE)
end_time = start_time;
if (GST_BUFFER_DURATION_IS_VALID (buffer))
end_time += GST_BUFFER_DURATION (buffer);
if (end_time != GST_CLOCK_TIME_NONE && end_time > self->last_stop)
self->last_stop = end_time;
} else {
self->last_stop += gst_buffer_get_size (buffer);
}
ret = gst_pad_push (self->srcpad, buffer);
GST_LOG_OBJECT (pad, "handled buffer %s", gst_flow_get_name (ret));
return ret;
}
/* Returns FALSE if no further pad, must be called with concat lock */
static gboolean
gst_concat_switch_pad (GstConcat * self)
{
GList *l;
gboolean next;
GstSegment segment;
gint64 last_stop;
segment = GST_CONCAT_PAD (self->current_sinkpad)->segment;
last_stop = self->last_stop;
if (last_stop == GST_CLOCK_TIME_NONE)
last_stop = segment.stop;
if (last_stop == GST_CLOCK_TIME_NONE)
last_stop = segment.start;
g_assert (last_stop != GST_CLOCK_TIME_NONE);
if (last_stop > segment.stop)
last_stop = segment.stop;
if (segment.format == GST_FORMAT_TIME)
last_stop =
gst_segment_to_running_time (&segment, segment.format, last_stop);
else
last_stop += segment.start;
self->current_start_offset += last_stop;
for (l = self->sinkpads; l; l = l->next) {
if ((gpointer) self->current_sinkpad == l->data) {
l = l->prev;
GST_DEBUG_OBJECT (self,
"Switching from pad %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT,
self->current_sinkpad, l ? l->data : NULL);
gst_object_unref (self->current_sinkpad);
self->current_sinkpad = l ? gst_object_ref (l->data) : NULL;
g_cond_broadcast (&self->cond);
break;
}
}
next = self->current_sinkpad != NULL;
self->last_stop = GST_CLOCK_TIME_NONE;
return next;
}
static void
gst_concat_notify_active_pad (GstConcat * self)
{
g_object_notify_by_pspec ((GObject *) self, pspec_active_pad);
}
static gboolean
gst_concat_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstConcat *self = GST_CONCAT (parent);
GstConcatPad *spad = GST_CONCAT_PAD_CAST (pad);
gboolean ret = TRUE;
GST_LOG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_STREAM_START:{
if (!gst_concat_pad_wait (spad, self)) {
ret = FALSE;
gst_event_unref (event);
} else {
ret = gst_pad_event_default (pad, parent, event);
}
break;
}
case GST_EVENT_SEGMENT:{
gboolean adjust_base;
/* Drop segment event, we create our own one */
gst_event_copy_segment (event, &spad->segment);
gst_event_unref (event);
g_mutex_lock (&self->lock);
adjust_base = self->adjust_base;
if (self->format == GST_FORMAT_UNDEFINED) {
if (spad->segment.format != GST_FORMAT_TIME
&& spad->segment.format != GST_FORMAT_BYTES) {
g_mutex_unlock (&self->lock);
GST_ELEMENT_ERROR (self, CORE, FAILED, (NULL),
("Can only operate in TIME or BYTES format"));
ret = FALSE;
break;
}
self->format = spad->segment.format;
GST_DEBUG_OBJECT (self, "Operating in %s format",
gst_format_get_name (self->format));
g_mutex_unlock (&self->lock);
} else if (self->format != spad->segment.format) {
g_mutex_unlock (&self->lock);
GST_ELEMENT_ERROR (self, CORE, FAILED, (NULL),
("Operating in %s format but new pad has %s",
gst_format_get_name (self->format),
gst_format_get_name (spad->segment.format)));
ret = FALSE;
} else {
g_mutex_unlock (&self->lock);
}
if (!gst_concat_pad_wait (spad, self)) {
ret = FALSE;
} else {
GstSegment segment = spad->segment;
if (adjust_base) {
/* We know no duration */
segment.duration = -1;
/* Update segment values to be continous with last stream */
if (self->format == GST_FORMAT_TIME) {
segment.base += self->current_start_offset;
} else {
/* Shift start/stop byte position */
segment.start += self->current_start_offset;
if (segment.stop != -1)
segment.stop += self->current_start_offset;
}
}
gst_pad_push_event (self->srcpad, gst_event_new_segment (&segment));
}
break;
}
case GST_EVENT_EOS:{
gst_event_unref (event);
if (!gst_concat_pad_wait (spad, self)) {
ret = FALSE;
} else {
gboolean next;
g_mutex_lock (&self->lock);
next = gst_concat_switch_pad (self);
g_mutex_unlock (&self->lock);
ret = TRUE;
gst_concat_notify_active_pad (self);
if (!next) {
gst_pad_push_event (self->srcpad, gst_event_new_eos ());
} else {
gst_element_post_message (GST_ELEMENT_CAST (self),
gst_message_new_duration_changed (GST_OBJECT_CAST (self)));
}
}
break;
}
case GST_EVENT_FLUSH_START:{
gboolean forward;
g_mutex_lock (&self->lock);
spad->flushing = TRUE;
g_cond_broadcast (&self->cond);
forward = (self->current_sinkpad == GST_PAD_CAST (spad));
if (!forward && g_list_length (self->sinkpads) == 1)
forward = TRUE;
g_mutex_unlock (&self->lock);
if (forward)
ret = gst_pad_event_default (pad, parent, event);
else
gst_event_unref (event);
break;
}
case GST_EVENT_FLUSH_STOP:{
gboolean forward;
gst_segment_init (&spad->segment, GST_FORMAT_UNDEFINED);
spad->flushing = FALSE;
g_mutex_lock (&self->lock);
forward = (self->current_sinkpad == GST_PAD_CAST (spad));
if (!forward && g_list_length (self->sinkpads) == 1)
forward = TRUE;
g_mutex_unlock (&self->lock);
if (forward) {
gboolean reset_time;
gst_event_parse_flush_stop (event, &reset_time);
if (reset_time) {
GST_DEBUG_OBJECT (self,
"resetting start offset to 0 after flushing with reset_time = TRUE");
self->current_start_offset = 0;
}
ret = gst_pad_event_default (pad, parent, event);
} else {
gst_event_unref (event);
}
break;
}
default:{
/* Wait for other serialized events before forwarding */
if (GST_EVENT_IS_SERIALIZED (event) && !gst_concat_pad_wait (spad, self)) {
gst_event_unref (event);
ret = FALSE;
} else {
ret = gst_pad_event_default (pad, parent, event);
}
break;
}
}
return ret;
}
static gboolean
gst_concat_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstConcat *self = GST_CONCAT (parent);
GstConcatPad *spad = GST_CONCAT_PAD_CAST (pad);
gboolean ret = TRUE;
GST_LOG_OBJECT (pad, "received query %" GST_PTR_FORMAT, query);
switch (GST_QUERY_TYPE (query)) {
default:
/* Wait for other serialized queries before forwarding */
if (GST_QUERY_IS_SERIALIZED (query) && !gst_concat_pad_wait (spad, self)) {
ret = FALSE;
} else {
ret = gst_pad_query_default (pad, parent, query);
}
break;
}
return ret;
}
static gboolean
gst_concat_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstConcat *self = GST_CONCAT (parent);
gboolean ret = TRUE;
GST_LOG_OBJECT (pad, "received event %" GST_PTR_FORMAT, event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
GstPad *sinkpad = NULL;
g_mutex_lock (&self->lock);
if ((sinkpad = self->current_sinkpad))
gst_object_ref (sinkpad);
/* If no current active sinkpad but only one sinkpad, try reactivating that pad */
if (sinkpad == NULL && g_list_length (self->sinkpads) == 1) {
sinkpad = gst_object_ref (self->sinkpads->data);
}
g_mutex_unlock (&self->lock);
if (sinkpad) {
ret = gst_pad_push_event (sinkpad, event);
gst_object_unref (sinkpad);
} else {
gst_event_unref (event);
ret = FALSE;
}
break;
}
case GST_EVENT_QOS:{
GstQOSType type;
GstClockTimeDiff diff;
GstClockTime timestamp;
gdouble proportion;
GstPad *sinkpad = NULL;
g_mutex_lock (&self->lock);
if ((sinkpad = self->current_sinkpad))
gst_object_ref (sinkpad);
g_mutex_unlock (&self->lock);
if (sinkpad) {
gst_event_parse_qos (event, &type, &proportion, &diff, ×tamp);
gst_event_unref (event);
if (timestamp != GST_CLOCK_TIME_NONE
&& timestamp > self->current_start_offset) {
timestamp -= self->current_start_offset;
event = gst_event_new_qos (type, proportion, diff, timestamp);
ret = gst_pad_push_event (self->current_sinkpad, event);
} else {
ret = FALSE;
}
gst_object_unref (sinkpad);
} else {
gst_event_unref (event);
ret = FALSE;
}
break;
}
case GST_EVENT_FLUSH_STOP:{
gboolean reset_time;
gst_event_parse_flush_stop (event, &reset_time);
if (reset_time) {
GST_DEBUG_OBJECT (self,
"resetting start offset to 0 after flushing with reset_time = TRUE");
self->current_start_offset = 0;
}
ret = gst_pad_event_default (pad, parent, event);
break;
}
default:
ret = gst_pad_event_default (pad, parent, event);
break;
}
return ret;
}
static gboolean
gst_concat_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
gboolean ret = TRUE;
GST_LOG_OBJECT (pad, "received query %" GST_PTR_FORMAT, query);
switch (GST_QUERY_TYPE (query)) {
default:
ret = gst_pad_query_default (pad, parent, query);
break;
}
return ret;
}
static void
reset_pad (const GValue * data, gpointer user_data)
{
GstPad *pad = g_value_get_object (data);
GstConcatPad *spad = GST_CONCAT_PAD_CAST (pad);
gst_segment_init (&spad->segment, GST_FORMAT_UNDEFINED);
spad->flushing = FALSE;
}
static void
unblock_pad (const GValue * data, gpointer user_data)
{
GstPad *pad = g_value_get_object (data);
GstConcatPad *spad = GST_CONCAT_PAD_CAST (pad);
spad->flushing = TRUE;
}
static GstStateChangeReturn
gst_concat_change_state (GstElement * element, GstStateChange transition)
{
GstConcat *self = GST_CONCAT (element);
GstStateChangeReturn ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:{
GstIterator *iter = gst_element_iterate_sink_pads (element);
GstIteratorResult res;
self->format = GST_FORMAT_UNDEFINED;
self->current_start_offset = 0;
self->last_stop = GST_CLOCK_TIME_NONE;
while ((res =
gst_iterator_foreach (iter, reset_pad,
NULL)) == GST_ITERATOR_RESYNC)
gst_iterator_resync (iter);
gst_iterator_free (iter);
if (res == GST_ITERATOR_ERROR)
return GST_STATE_CHANGE_FAILURE;
break;
}
case GST_STATE_CHANGE_PAUSED_TO_READY:{
GstIterator *iter = gst_element_iterate_sink_pads (element);
GstIteratorResult res;
g_mutex_lock (&self->lock);
while ((res =
gst_iterator_foreach (iter, unblock_pad,
NULL)) == GST_ITERATOR_RESYNC)
gst_iterator_resync (iter);
gst_iterator_free (iter);
g_cond_broadcast (&self->cond);
g_mutex_unlock (&self->lock);
if (res == GST_ITERATOR_ERROR)
return GST_STATE_CHANGE_FAILURE;
break;
}
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
return ret;
}