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gstreamer/plugins/elements/gstmultiqueue.c
Edward Hervey 4e07e925a5 plugins/elements/gstmultiqueue.c: When dynamically creating single queues, activate sinkpad before adding it. 
Original commit message from CVS:
* plugins/elements/gstmultiqueue.c: (gst_single_queue_new):
When dynamically creating single queues, activate sinkpad before adding
it.
We should be doing the same thing for the source pad, but we can't
since it would call a method which needs the parent to be set in order
to work propertly. Instead of activating the source pad, we just unset
the flushing flag, which is the minimal requirement for adding a pad
to an element in a state greater than READY.
2007-01-17 14:33:39 +00:00

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/* GStreamer
* Copyright (C) 2006 Edward Hervey <edward@fluendo.com>
*
* gstmultiqueue.c:
*
* 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 <gst/gst.h>
#include "gstmultiqueue.h"
/**
* GstSingleQueue:
* @sinkpad: associated sink #GstPad
* @srcpad: associated source #GstPad
*
* Structure containing all information and properties about
* a single queue.
*/
typedef struct _GstSingleQueue GstSingleQueue;
struct _GstSingleQueue
{
/* unique identifier of the queue */
guint id;
GstMultiQueue *mqueue;
GstPad *sinkpad;
GstPad *srcpad;
/* flowreturn of previous srcpad push */
GstFlowReturn srcresult;
/* queue of data */
GstDataQueue *queue;
GstDataQueueSize max_size, extra_size;
/* Protected by global lock */
guint32 nextid; /* ID of the next object waiting to be pushed */
guint32 oldid; /* ID of the last object pushed (last in a series) */
GCond *turn; /* SingleQueue turn waiting conditional */
};
/* Extension of GstDataQueueItem structure for our usage */
typedef struct _GstMultiQueueItem GstMultiQueueItem;
struct _GstMultiQueueItem
{
GstMiniObject *object;
guint size;
guint64 duration;
gboolean visible;
GDestroyNotify destroy;
guint32 posid;
};
static GstSingleQueue *gst_single_queue_new (GstMultiQueue * mqueue);
static void wake_up_next_non_linked (GstMultiQueue * mq);
static void compute_next_non_linked (GstMultiQueue * mq);
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src%d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (multi_queue_debug);
#define GST_CAT_DEFAULT (multi_queue_debug)
static const GstElementDetails gst_multi_queue_details =
GST_ELEMENT_DETAILS ("MultiQueue",
"Generic",
"Multiple data queue",
"Edward Hervey <edward@fluendo.com>");
#define DEFAULT_MAX_SIZE_BYTES 10 * 1024 * 1024 /* 10 MB */
#define DEFAULT_MAX_SIZE_BUFFERS 200
#define DEFAULT_MAX_SIZE_TIME GST_SECOND
#define DEFAULT_EXTRA_SIZE_BYTES 10 * 1024 * 1024 /* 10 MB */
#define DEFAULT_EXTRA_SIZE_BUFFERS 200
#define DEFAULT_EXTRA_SIZE_TIME GST_SECOND
/* Signals and args */
enum
{
SIGNAL_UNDERRUN,
SIGNAL_OVERRUN,
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_EXTRA_SIZE_BYTES,
ARG_EXTRA_SIZE_BUFFERS,
ARG_EXTRA_SIZE_TIME,
ARG_MAX_SIZE_BYTES,
ARG_MAX_SIZE_BUFFERS,
ARG_MAX_SIZE_TIME,
};
#define GST_MULTI_QUEUE_MUTEX_LOCK(q) G_STMT_START { \
GST_CAT_LOG_OBJECT (multi_queue_debug, q, \
"locking qlock from thread %p", \
g_thread_self ()); \
g_mutex_lock (q->qlock); \
GST_CAT_LOG_OBJECT (multi_queue_debug, q, \
"locked qlock from thread %p", \
g_thread_self ()); \
} G_STMT_END
#define GST_MULTI_QUEUE_MUTEX_UNLOCK(q) G_STMT_START { \
GST_CAT_LOG_OBJECT (multi_queue_debug, q, \
"unlocking qlock from thread %p", \
g_thread_self ()); \
g_mutex_unlock (q->qlock); \
} G_STMT_END
static void gst_multi_queue_finalize (GObject * object);
static void gst_multi_queue_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_multi_queue_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstPad *gst_multi_queue_request_new_pad (GstElement * element,
GstPadTemplate * temp, const gchar * name);
static void gst_multi_queue_release_pad (GstElement * element, GstPad * pad);
#define _do_init(bla) \
GST_DEBUG_CATEGORY_INIT (multi_queue_debug, "multiqueue", 0, "multiqueue element");
GST_BOILERPLATE_FULL (GstMultiQueue, gst_multi_queue, GstElement,
GST_TYPE_ELEMENT, _do_init);
static guint gst_multi_queue_signals[LAST_SIGNAL] = { 0 };
static void
gst_multi_queue_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 (&sinktemplate));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&srctemplate));
gst_element_class_set_details (gstelement_class, &gst_multi_queue_details);
}
static void
gst_multi_queue_class_init (GstMultiQueueClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_multi_queue_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_multi_queue_get_property);
/* SIGNALS */
gst_multi_queue_signals[SIGNAL_UNDERRUN] =
g_signal_new ("underrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GstMultiQueueClass, underrun), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
gst_multi_queue_signals[SIGNAL_OVERRUN] =
g_signal_new ("overrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GstMultiQueueClass, overrun), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
/* PROPERTIES */
g_object_class_install_property (gobject_class, ARG_MAX_SIZE_BYTES,
g_param_spec_uint ("max-size-bytes", "Max. size (kB)",
"Max. amount of data in the queue (bytes, 0=disable)",
0, G_MAXUINT, DEFAULT_MAX_SIZE_BYTES, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_MAX_SIZE_BUFFERS,
g_param_spec_uint ("max-size-buffers", "Max. size (buffers)",
"Max. number of buffers in the queue (0=disable)",
0, G_MAXUINT, DEFAULT_MAX_SIZE_BUFFERS, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_MAX_SIZE_TIME,
g_param_spec_uint64 ("max-size-time", "Max. size (ns)",
"Max. amount of data in the queue (in ns, 0=disable)",
0, G_MAXUINT64, DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_EXTRA_SIZE_BYTES,
g_param_spec_uint ("extra-size-bytes", "Extra Size (kB)",
"Amount of data the queues can grow if one of them is empty (bytes, 0=disable)",
0, G_MAXUINT, DEFAULT_EXTRA_SIZE_BYTES, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_EXTRA_SIZE_BUFFERS,
g_param_spec_uint ("extra-size-buffers", "Extra Size (buffers)",
"Amount of buffers the queues can grow if one of them is empty (0=disable)",
0, G_MAXUINT, DEFAULT_EXTRA_SIZE_BUFFERS, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_EXTRA_SIZE_TIME,
g_param_spec_uint64 ("extra-size-time", "Extra Size (ns)",
"Amount of time the queues can grow if one of them is empty (in ns, 0=disable)",
0, G_MAXUINT64, DEFAULT_EXTRA_SIZE_TIME, G_PARAM_READWRITE));
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_multi_queue_finalize);
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_multi_queue_request_new_pad);
gstelement_class->release_pad =
GST_DEBUG_FUNCPTR (gst_multi_queue_release_pad);
}
static void
gst_multi_queue_init (GstMultiQueue * mqueue, GstMultiQueueClass * klass)
{
mqueue->nbqueues = 0;
mqueue->queues = NULL;
mqueue->max_size.bytes = DEFAULT_MAX_SIZE_BYTES;
mqueue->max_size.visible = DEFAULT_MAX_SIZE_BUFFERS;
mqueue->max_size.time = DEFAULT_MAX_SIZE_TIME;
mqueue->extra_size.bytes = DEFAULT_EXTRA_SIZE_BYTES;
mqueue->extra_size.visible = DEFAULT_EXTRA_SIZE_BUFFERS;
mqueue->extra_size.time = DEFAULT_EXTRA_SIZE_TIME;
mqueue->counter = 0;
mqueue->highid = -1;
mqueue->nextnotlinked = -1;
mqueue->qlock = g_mutex_new ();
/* FILLME ? */
}
static void
gst_multi_queue_finalize (GObject * object)
{
GstMultiQueue *mqueue = GST_MULTI_QUEUE (object);
GList *tmp = mqueue->queues;
/* FILLME ? */
/* DRAIN QUEUES */
while (tmp) {
GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
gst_data_queue_flush (sq->queue);
g_object_unref (G_OBJECT (sq->queue));
tmp = g_list_next (tmp);
}
g_list_free (mqueue->queues);
/* free/unref instance data */
g_mutex_free (mqueue->qlock);
if (G_OBJECT_CLASS (parent_class)->finalize)
G_OBJECT_CLASS (parent_class)->finalize (object);
}
#define SET_CHILD_PROPERTY(mq,name,value) G_STMT_START { \
GList * tmp = mq->queues; \
while (tmp) { \
GstSingleQueue *q = (GstSingleQueue*)tmp->data; \
g_object_set_property ((GObject*) q->queue, name, value); \
tmp = g_list_next(tmp); \
}; \
} G_STMT_END
static void
gst_multi_queue_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMultiQueue *mq = GST_MULTI_QUEUE (object);
switch (prop_id) {
case ARG_MAX_SIZE_BYTES:
mq->max_size.bytes = g_value_get_uint (value);
SET_CHILD_PROPERTY (mq, "max-size-bytes", value);
break;
case ARG_MAX_SIZE_BUFFERS:
mq->max_size.visible = g_value_get_uint (value);
SET_CHILD_PROPERTY (mq, "max-size-visible", value);
break;
case ARG_MAX_SIZE_TIME:
mq->max_size.time = g_value_get_uint64 (value);
SET_CHILD_PROPERTY (mq, "max-size-time", value);
break;
case ARG_EXTRA_SIZE_BYTES:
mq->extra_size.bytes = g_value_get_uint (value);
break;
case ARG_EXTRA_SIZE_BUFFERS:
mq->extra_size.visible = g_value_get_uint (value);
break;
case ARG_EXTRA_SIZE_TIME:
mq->extra_size.time = g_value_get_uint64 (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_multi_queue_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMultiQueue *mq = GST_MULTI_QUEUE (object);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
switch (prop_id) {
case ARG_EXTRA_SIZE_BYTES:
g_value_set_uint (value, mq->extra_size.bytes);
break;
case ARG_EXTRA_SIZE_BUFFERS:
g_value_set_uint (value, mq->extra_size.visible);
break;
case ARG_EXTRA_SIZE_TIME:
g_value_set_uint64 (value, mq->extra_size.time);
break;
case ARG_MAX_SIZE_BYTES:
g_value_set_uint (value, mq->max_size.bytes);
break;
case ARG_MAX_SIZE_BUFFERS:
g_value_set_uint (value, mq->max_size.visible);
break;
case ARG_MAX_SIZE_TIME:
g_value_set_uint64 (value, mq->max_size.time);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
}
/*
* GstElement methods
*/
static GstPad *
gst_multi_queue_request_new_pad (GstElement * element, GstPadTemplate * temp,
const gchar * name)
{
GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
GstSingleQueue *squeue;
GST_LOG_OBJECT (element, "name : %s", name);
/* Create a new single queue, add the sink and source pad and return the sink pad */
squeue = gst_single_queue_new (mqueue);
GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
mqueue->queues = g_list_append (mqueue->queues, squeue);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
GST_DEBUG_OBJECT (mqueue, "Returning pad %s:%s",
GST_DEBUG_PAD_NAME (squeue->sinkpad));
return squeue->sinkpad;
}
static void
gst_multi_queue_release_pad (GstElement * element, GstPad * pad)
{
GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
GstSingleQueue *sq = NULL;
GList *tmp;
GST_LOG_OBJECT (element, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
/* Find which single queue it belongs to, knowing that it should be a sinkpad */
for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
sq = (GstSingleQueue *) tmp->data;
if (sq->sinkpad == pad)
break;
}
if (!tmp) {
GST_WARNING_OBJECT (mqueue, "That pad doesn't belong to this element ???");
return;
}
/* remove it from the list */
mqueue->queues = g_list_delete_link (mqueue->queues, tmp);
/* delete SingleQueue */
gst_data_queue_set_flushing (sq->queue, TRUE);
gst_data_queue_flush (sq->queue);
g_object_unref (G_OBJECT (sq->queue));
gst_element_remove_pad (element, sq->srcpad);
gst_element_remove_pad (element, sq->sinkpad);
/* FIXME : recompute next-non-linked */
GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
}
static gboolean
gst_single_queue_push_one (GstMultiQueue * mq, GstSingleQueue * sq,
GstMiniObject * object)
{
if (GST_IS_BUFFER (object)) {
sq->srcresult = gst_pad_push (sq->srcpad, GST_BUFFER (object));
if ((sq->srcresult != GST_FLOW_OK)
&& (sq->srcresult != GST_FLOW_NOT_LINKED)) {
GST_DEBUG_OBJECT (mq, "GstSingleQueue %d : pausing queue, reason %s",
sq->id, gst_flow_get_name (sq->srcresult));
gst_data_queue_set_flushing (sq->queue, TRUE);
gst_pad_pause_task (sq->srcpad);
}
} else if (GST_IS_EVENT (object)) {
if (GST_EVENT_TYPE (object) == GST_EVENT_EOS) {
sq->srcresult = GST_FLOW_UNEXPECTED;
GST_DEBUG_OBJECT (mq, "GstSingleQueue %d : pausing queue, got EOS",
sq->id);
gst_data_queue_set_flushing (sq->queue, TRUE);
gst_pad_pause_task (sq->srcpad);
}
gst_pad_push_event (sq->srcpad, GST_EVENT (object));
} else {
g_warning ("Unexpected object in singlequeue %d (refcounting problem?)",
sq->id);
}
return FALSE;
}
static void
gst_multi_queue_item_destroy (GstMultiQueueItem * item)
{
gst_mini_object_unref (item->object);
g_free (item);
}
static GstMultiQueueItem *
gst_multi_queue_item_new (GstMiniObject * object)
{
GstMultiQueueItem *item;
item = g_new0 (GstMultiQueueItem, 1);
item->object = gst_mini_object_ref (object);
item->destroy = (GDestroyNotify) gst_multi_queue_item_destroy;
if (GST_IS_BUFFER (object)) {
item->size = GST_BUFFER_SIZE (object);
item->duration = GST_BUFFER_DURATION (object);
if (item->duration == GST_CLOCK_TIME_NONE)
item->duration = 0;
item->visible = TRUE;
}
return item;
}
static void
gst_multi_queue_loop (GstPad * pad)
{
GstSingleQueue *sq;
GstMultiQueueItem *item;
GstDataQueueItem *sitem;
GstMultiQueue *mq;
GstMiniObject *object;
guint32 newid;
guint32 oldid = -1;
sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
mq = (GstMultiQueue *) gst_pad_get_parent (pad);
restart:
GST_DEBUG_OBJECT (mq, "SingleQueue %d : trying to pop an object", sq->id);
if (!(gst_data_queue_pop (sq->queue, &sitem))) {
/* QUEUE FLUSHING */
if (sq->srcresult != GST_FLOW_OK)
goto out_flushing;
else
GST_WARNING_OBJECT (mq,
"data_queue_pop() returned FALSE, but srcresult == GST_FLOW_OK !");
} else {
item = (GstMultiQueueItem *) sitem;
newid = item->posid;
object = item->object;
GST_LOG_OBJECT (mq, "SingleQueue %d : newid:%d , oldid:%d",
sq->id, newid, oldid);
/* 1. Only check turn if :
* _ We haven't pushed anything yet
* _ OR the new id isn't the follower of the previous one (continuous segment) */
if ((oldid == -1) || (newid != (oldid + 1))) {
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
GST_LOG_OBJECT (mq, "CHECKING sq->srcresult: %s",
gst_flow_get_name (sq->srcresult));
/* preamble : if we're not linked, set the newid as the next one we want */
if (sq->srcresult == GST_FLOW_NOT_LINKED)
sq->nextid = newid;
/* store the last id we outputted */
if (oldid != -1)
sq->oldid = oldid;
/* 2. If there's a queue waiting to push, wake it up. If it's us the */
/* check below (3.) will avoid us waiting. */
wake_up_next_non_linked (mq);
/* 3. If we're not linked AND our nextid is higher than the highest oldid outputted
* _ Update global next-not-linked
* _ Wait on our conditional
*/
while ((sq->srcresult == GST_FLOW_NOT_LINKED)
&& (mq->nextnotlinked != sq->id)) {
compute_next_non_linked (mq);
g_cond_wait (sq->turn, mq->qlock);
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
/* 4. Check again status, maybe we're flushing */
if ((sq->srcresult != GST_FLOW_OK)
&& (sq->srcresult != GST_FLOW_NOT_LINKED)) {
gst_multi_queue_item_destroy (item);
goto out_flushing;
}
}
GST_LOG_OBJECT (mq, "BEFORE PUSHING sq->srcresult: %s",
gst_flow_get_name (sq->srcresult));
/* 4. Try to push out the new object */
gst_single_queue_push_one (mq, sq, object);
GST_LOG_OBJECT (mq, "AFTER PUSHING sq->srcresult: %s",
gst_flow_get_name (sq->srcresult));
gst_multi_queue_item_destroy (item);
oldid = newid;
/* 5. if GstFlowReturn is non-fatal, goto restart */
if ((sq->srcresult == GST_FLOW_OK)
|| (sq->srcresult == GST_FLOW_NOT_LINKED))
goto restart;
}
beach:
gst_object_unref (mq);
return;
out_flushing:
{
gst_pad_pause_task (sq->srcpad);
GST_CAT_LOG_OBJECT (multi_queue_debug, mq,
"SingleQueue[%d] task paused, reason:%s",
sq->id, gst_flow_get_name (sq->srcresult));
goto beach;
}
}
/**
* gst_multi_queue_chain:
*
* This is similar to GstQueue's chain function, except:
* _ we don't have leak behavioures,
* _ we push with a unique id (curid)
*/
static GstFlowReturn
gst_multi_queue_chain (GstPad * pad, GstBuffer * buffer)
{
GstSingleQueue *sq;
GstMultiQueue *mq;
GstMultiQueueItem *item;
GstFlowReturn ret = GST_FLOW_OK;
guint32 curid;
sq = gst_pad_get_element_private (pad);
mq = (GstMultiQueue *) gst_pad_get_parent (pad);
/* Get an unique incrementing id */
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
curid = mq->counter++;
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
GST_LOG_OBJECT (mq, "SingleQueue %d : about to push buffer with id %d",
sq->id, curid);
item = gst_multi_queue_item_new ((GstMiniObject *) buffer);
item->posid = curid;
if (!(gst_data_queue_push (sq->queue, (GstDataQueueItem *) item))) {
GST_LOG_OBJECT (mq, "SingleQueue %d : exit because task paused, reason: %s",
sq->id, gst_flow_get_name (sq->srcresult));
gst_multi_queue_item_destroy (item);
gst_buffer_unref (buffer);
ret = sq->srcresult;
}
gst_object_unref (mq);
return ret;
}
static gboolean
gst_multi_queue_sink_activate_push (GstPad * pad, gboolean active)
{
GstSingleQueue *sq;
sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
if (active)
sq->srcresult = GST_FLOW_OK;
else {
sq->srcresult = GST_FLOW_WRONG_STATE;
gst_data_queue_flush (sq->queue);
}
return TRUE;
}
static gboolean
gst_multi_queue_sink_event (GstPad * pad, GstEvent * event)
{
GstSingleQueue *sq;
GstMultiQueue *mq;
guint32 curid;
GstMultiQueueItem *item;
sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
mq = (GstMultiQueue *) gst_pad_get_parent (pad);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
GST_DEBUG_OBJECT (mq, "SingleQueue %d : received flush start event",
sq->id);
gst_pad_push_event (sq->srcpad, event);
sq->srcresult = GST_FLOW_WRONG_STATE;
gst_data_queue_set_flushing (sq->queue, TRUE);
/* wake up non-linked task */
GST_LOG_OBJECT (mq, "SingleQueue %d : waking up eventually waiting task",
sq->id);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
g_cond_signal (sq->turn);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_pad_pause_task (sq->srcpad);
goto done;
case GST_EVENT_FLUSH_STOP:
GST_DEBUG_OBJECT (mq, "SingleQueue %d : received flush stop event",
sq->id);
gst_pad_push_event (sq->srcpad, event);
gst_data_queue_flush (sq->queue);
gst_data_queue_set_flushing (sq->queue, FALSE);
sq->srcresult = GST_FLOW_OK;
sq->nextid = -1;
sq->oldid = -1;
GST_DEBUG_OBJECT (mq, "SingleQueue %d : restarting task", sq->id);
gst_pad_start_task (sq->srcpad, (GstTaskFunction) gst_multi_queue_loop,
sq->srcpad);
goto done;
default:
if (!(GST_EVENT_IS_SERIALIZED (event))) {
gst_pad_push_event (sq->srcpad, event);
goto done;
}
break;
}
/* Get an unique incrementing id */
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
curid = mq->counter++;
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
item = gst_multi_queue_item_new ((GstMiniObject *) event);
item->posid = curid;
GST_DEBUG_OBJECT (mq,
"SingleQueue %d : Adding event %p of type %s with id %d", sq->id, event,
GST_EVENT_TYPE_NAME (event), curid);
if (!(gst_data_queue_push (sq->queue, (GstDataQueueItem *) item))) {
GST_LOG_OBJECT (mq, "SingleQueue %d : exit because task paused, reason: %s",
sq->id, gst_flow_get_name (sq->srcresult));
gst_multi_queue_item_destroy (item);
gst_event_unref (event);
}
done:
gst_object_unref (mq);
return TRUE;
}
static GstCaps *
gst_multi_queue_getcaps (GstPad * pad)
{
GstSingleQueue *sq = gst_pad_get_element_private (pad);
GstPad *otherpad;
GstCaps *result;
GST_LOG_OBJECT (pad, "...");
otherpad = (pad == sq->srcpad) ? sq->sinkpad : sq->srcpad;
GST_LOG_OBJECT (otherpad, "Getting caps from the peer of this pad");
result = gst_pad_peer_get_caps (otherpad);
if (result == NULL)
result = gst_caps_new_any ();
return result;
}
static GstFlowReturn
gst_multi_queue_bufferalloc (GstPad * pad, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
GstSingleQueue *sq = gst_pad_get_element_private (pad);
return gst_pad_alloc_buffer (sq->srcpad, offset, size, caps, buf);
}
static gboolean
gst_multi_queue_src_activate_push (GstPad * pad, gboolean active)
{
GstMultiQueue *mq;
GstSingleQueue *sq;
gboolean result = FALSE;
sq = (GstSingleQueue *) gst_pad_get_element_private (pad);
mq = (GstMultiQueue *) gst_pad_get_parent (pad);
GST_LOG ("SingleQueue %d", sq->id);
if (active) {
sq->srcresult = GST_FLOW_OK;
gst_data_queue_set_flushing (sq->queue, FALSE);
result = gst_pad_start_task (pad, (GstTaskFunction) gst_multi_queue_loop,
pad);
} else {
/* 1. unblock loop function */
sq->srcresult = GST_FLOW_WRONG_STATE;
gst_data_queue_set_flushing (sq->queue, TRUE);
/* 2. unblock potentially non-linked pad */
GST_LOG_OBJECT (mq, "SingleQueue %d : waking up eventually waiting task",
sq->id);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
g_cond_signal (sq->turn);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
/* 3. make sure streaming finishes */
result = gst_pad_stop_task (pad);
gst_data_queue_set_flushing (sq->queue, FALSE);
}
gst_object_unref (mq);
return result;
}
static gboolean
gst_multi_queue_acceptcaps (GstPad * pad, GstCaps * caps)
{
return TRUE;
}
static gboolean
gst_multi_queue_src_event (GstPad * pad, GstEvent * event)
{
GstSingleQueue *sq = gst_pad_get_element_private (pad);
return gst_pad_push_event (sq->sinkpad, event);
}
static gboolean
gst_multi_queue_src_query (GstPad * pad, GstQuery * query)
{
GstSingleQueue *sq = gst_pad_get_element_private (pad);
GstPad *peerpad;
gboolean res;
/* FILLME */
/* Handle position offset depending on queue size */
/* default handling */
if (!(peerpad = gst_pad_get_peer (sq->sinkpad)))
goto no_peer;
res = gst_pad_query (peerpad, query);
gst_object_unref (peerpad);
return res;
no_peer:
{
GST_LOG_OBJECT (sq->sinkpad, "Couldn't send query because we have no peer");
return FALSE;
}
}
/*
* Next-non-linked functions
*/
/* WITH LOCK TAKEN */
static void
wake_up_next_non_linked (GstMultiQueue * mq)
{
GList *tmp;
GST_LOG ("mq->nextnotlinked:%d", mq->nextnotlinked);
/* maybe no-one is waiting */
if (mq->nextnotlinked == -1)
return;
/* Else figure out which singlequeue it is and wake it up */
for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
if (sq->srcresult == GST_FLOW_NOT_LINKED)
if (sq->id == mq->nextnotlinked) {
GST_LOG_OBJECT (mq, "Waking up singlequeue %d", sq->id);
g_cond_signal (sq->turn);
return;
}
}
}
/* WITH LOCK TAKEN */
static void
compute_next_non_linked (GstMultiQueue * mq)
{
GList *tmp;
guint32 lowest = G_MAXUINT32;
gint nextid = -1;
for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
GST_LOG ("inspecting sq:%d , nextid:%d, oldid:%d, srcresult:%s",
sq->id, sq->nextid, sq->oldid, gst_flow_get_name (sq->srcresult));
if (sq->srcresult == GST_FLOW_NOT_LINKED)
if (lowest > sq->nextid) {
lowest = sq->nextid;
nextid = sq->id;
}
/* If we don't have a global highid, or the global highid is lower than */
/* this single queue's last outputted id, store the queue's one */
if ((mq->highid == -1) || (mq->highid < sq->oldid))
mq->highid = sq->oldid;
}
mq->nextnotlinked = nextid;
GST_LOG_OBJECT (mq,
"Next-non-linked is sq #%d with nextid : %d. Highid is now : %d", nextid,
lowest, mq->highid);
}
/*
* GstSingleQueue functions
*/
static void
single_queue_overrun_cb (GstSingleQueue * sq, GstMultiQueue * mq)
{
GST_LOG_OBJECT (mq, "Single Queue %d is full", sq->id);
/* Overrun is always forwarded, since this is blocking the upstream element */
g_signal_emit (G_OBJECT (mq), gst_multi_queue_signals[SIGNAL_OVERRUN], 0);
}
static void
single_queue_underrun_cb (GstSingleQueue * sq, GstMultiQueue * mq)
{
gboolean empty = TRUE;
GList *tmp;
GST_LOG_OBJECT (mq,
"Single Queue %d is empty, Checking if all single queues are empty",
sq->id);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
if (!gst_data_queue_is_empty (sq->queue)) {
empty = FALSE;
break;
}
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
if (empty) {
GST_DEBUG_OBJECT (mq, "All queues are empty, signalling it");
g_signal_emit (G_OBJECT (mq), gst_multi_queue_signals[SIGNAL_UNDERRUN], 0);
}
}
static gboolean
single_queue_check_full (GstDataQueue * dataq, guint visible, guint bytes,
guint64 time, GstSingleQueue * sq)
{
gboolean res;
res = (((sq->max_size.visible != 0) &&
sq->max_size.visible < visible) ||
((sq->max_size.bytes != 0) &&
sq->max_size.bytes < bytes) ||
((sq->max_size.time != 0) && sq->max_size.time < time));
return res;
}
static GstSingleQueue *
gst_single_queue_new (GstMultiQueue * mqueue)
{
GstSingleQueue *sq;
gchar *tmp;
sq = g_new0 (GstSingleQueue, 1);
GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
sq->id = mqueue->nbqueues++;
/* copy over max_size and extra_size so we don't need to take the lock
* any longer when checking if the queue is full. */
/* FIXME : We can't modify those values once the single queue is created
* since we don't have any lock protecting those values. */
sq->max_size.visible = mqueue->max_size.visible;
sq->max_size.bytes = mqueue->max_size.bytes;
sq->max_size.time = mqueue->max_size.time;
sq->extra_size.visible = mqueue->extra_size.visible;
sq->extra_size.bytes = mqueue->extra_size.bytes;
sq->extra_size.time = mqueue->extra_size.time;
GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
GST_DEBUG_OBJECT (mqueue, "Creating GstSingleQueue id:%d", sq->id);
sq->mqueue = mqueue;
sq->srcresult = GST_FLOW_OK;
sq->queue = gst_data_queue_new ((GstDataQueueCheckFullFunction)
single_queue_check_full, sq);
sq->nextid = -1;
sq->oldid = -1;
sq->turn = g_cond_new ();
/* FIXME : attach to underrun/overrun signals to handle non-starvation
* OR should this be handled when we check if the queue is full/empty before pushing/popping ? */
g_signal_connect (G_OBJECT (sq->queue), "full",
G_CALLBACK (single_queue_overrun_cb), mqueue);
g_signal_connect (G_OBJECT (sq->queue), "empty",
G_CALLBACK (single_queue_underrun_cb), mqueue);
tmp = g_strdup_printf ("sink%d", sq->id);
sq->sinkpad = gst_pad_new_from_static_template (&sinktemplate, tmp);
g_free (tmp);
gst_pad_set_chain_function (sq->sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_chain));
gst_pad_set_activatepush_function (sq->sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_sink_activate_push));
gst_pad_set_event_function (sq->sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_sink_event));
gst_pad_set_getcaps_function (sq->sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_getcaps));
gst_pad_set_bufferalloc_function (sq->sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_bufferalloc));
tmp = g_strdup_printf ("src%d", sq->id);
sq->srcpad = gst_pad_new_from_static_template (&srctemplate, tmp);
g_free (tmp);
gst_pad_set_activatepush_function (sq->srcpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_src_activate_push));
gst_pad_set_acceptcaps_function (sq->srcpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_acceptcaps));
gst_pad_set_getcaps_function (sq->srcpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_getcaps));
gst_pad_set_event_function (sq->srcpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_src_event));
gst_pad_set_query_function (sq->srcpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_src_query));
gst_pad_set_element_private (sq->sinkpad, (gpointer) sq);
gst_pad_set_element_private (sq->srcpad, (gpointer) sq);
gst_pad_set_active (sq->sinkpad, TRUE);
gst_element_add_pad (GST_ELEMENT (mqueue), sq->sinkpad);
GST_OBJECT_FLAG_UNSET (sq->srcpad, GST_PAD_FLUSHING);
gst_element_add_pad (GST_ELEMENT (mqueue), sq->srcpad);
gst_pad_set_active (sq->srcpad, TRUE);
gst_pad_set_active (sq->sinkpad, TRUE);
GST_DEBUG_OBJECT (mqueue, "GstSingleQueue [%d] created and pads added",
sq->id);
return sq;
}
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