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gstreamer/plugins/elements/gstmultiqueue.c
Mathieu Duponchelle d2299180c9 multiqueue: fix link-like syntax in doc
2020-04-28 00:33:22 +02:00

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/* GStreamer
* Copyright (C) 2006 Edward Hervey <edward@fluendo.com>
* Copyright (C) 2007 Jan Schmidt <jan@fluendo.com>
* Copyright (C) 2007 Wim Taymans <wim@fluendo.com>
* Copyright (C) 2011 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-multiqueue
* @title: multiqueue
* @see_also: #GstQueue
*
* Multiqueue is similar to a normal #GstQueue with the following additional
* features:
*
* 1) Multiple streamhandling
*
* * The element handles queueing data on more than one stream at once. To
* achieve such a feature it has request sink pads (sink%u) and
* 'sometimes' src pads (src%u). When requesting a given sinkpad with gst_element_request_pad(),
* the associated srcpad for that stream will be created.
* Example: requesting sink1 will generate src1.
*
* 2) Non-starvation on multiple stream
*
* * If more than one stream is used with the element, the streams' queues
* will be dynamically grown (up to a limit), in order to ensure that no
* stream is risking data starvation. This guarantees that at any given
* time there are at least N bytes queued and available for each individual
* stream. If an EOS event comes through a srcpad, the associated queue will be
* considered as 'not-empty' in the queue-size-growing algorithm.
*
* 3) Non-linked srcpads graceful handling
*
* * In order to better support dynamic switching between streams, the multiqueue
* (unlike the current GStreamer queue) continues to push buffers on non-linked
* pads rather than shutting down. In addition, to prevent a non-linked stream from very quickly consuming all
* available buffers and thus 'racing ahead' of the other streams, the element
* must ensure that buffers and inlined events for a non-linked stream are pushed
* in the same order as they were received, relative to the other streams
* controlled by the element. This means that a buffer cannot be pushed to a
* non-linked pad any sooner than buffers in any other stream which were received
* before it.
*
* Data is queued until one of the limits specified by the
* #GstMultiQueue:max-size-buffers, #GstMultiQueue:max-size-bytes and/or
* #GstMultiQueue:max-size-time properties has been reached. Any attempt to push
* more buffers into the queue will block the pushing thread until more space
* becomes available. #GstMultiQueue:extra-size-buffers,
*
*
* #GstMultiQueue:extra-size-bytes and #GstMultiQueue:extra-size-time are
* currently unused.
*
* The default queue size limits are 5 buffers, 10MB of data, or
* two second worth of data, whichever is reached first. Note that the number
* of buffers will dynamically grow depending on the fill level of
* other queues.
*
* The #GstMultiQueue::underrun signal is emitted when all of the queues
* are empty. The #GstMultiQueue::overrun signal is emitted when one of the
* queues is filled.
* Both signals are emitted from the context of the streaming thread.
*
* When using #GstMultiQueue:sync-by-running-time the unlinked streams will
* be throttled by the highest running-time of linked streams. This allows
* further relinking of those unlinked streams without them being in the
* future (i.e. to achieve gapless playback).
* When dealing with streams which have got different consumption requirements
* downstream (ex: video decoders which will consume more buffer (in time) than
* audio decoders), it is recommended to group streams of the same type
* by using the pad "group-id" property. This will further throttle streams
* in time within that group.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gst/gst.h>
#include <stdio.h>
#include "gstmultiqueue.h"
#include <gst/glib-compat-private.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
{
volatile gint refcount;
/* unique identifier of the queue */
guint id;
/* group of streams to which this queue belongs to */
guint groupid;
GstClockTimeDiff group_high_time;
GWeakRef mqueue;
GWeakRef sinkpad;
GWeakRef srcpad;
/* flowreturn of previous srcpad push */
GstFlowReturn srcresult;
/* If something was actually pushed on
* this pad after flushing/pad activation
* and the srcresult corresponds to something
* real
*/
gboolean pushed;
/* segments */
GstSegment sink_segment;
GstSegment src_segment;
gboolean has_src_segment; /* preferred over initializing the src_segment to
* UNDEFINED as this doesn't requires adding ifs
* in every segment usage */
/* position of src/sink */
GstClockTimeDiff sinktime, srctime;
/* cached input value, used for interleave */
GstClockTimeDiff cached_sinktime;
/* TRUE if either position needs to be recalculated */
gboolean sink_tainted, src_tainted;
/* queue of data */
GstDataQueue *queue;
GstDataQueueSize max_size, extra_size;
GstClockTime cur_time;
gboolean is_eos;
gboolean is_segment_done;
gboolean is_sparse;
gboolean flushing;
gboolean active;
/* 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) */
guint32 last_oldid; /* Previously observed old_id, reset to MAXUINT32 on flush */
GstClockTimeDiff next_time; /* End running time of next buffer to be pushed */
GstClockTimeDiff last_time; /* Start running time of last pushed buffer */
GCond turn; /* SingleQueue turn waiting conditional */
/* for serialized queries */
GCond query_handled;
gboolean last_query;
GstQuery *last_handled_query;
/* For interleave calculation */
GThread *thread; /* Streaming thread of SingleQueue */
GstClockTime interleave; /* Calculated interleve within the thread */
};
/* 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;
gboolean is_query;
};
static GstSingleQueue *gst_single_queue_new (GstMultiQueue * mqueue, guint id);
static void gst_single_queue_unref (GstSingleQueue * squeue);
static GstSingleQueue *gst_single_queue_ref (GstSingleQueue * squeue);
static void wake_up_next_non_linked (GstMultiQueue * mq);
static void compute_high_id (GstMultiQueue * mq);
static void compute_high_time (GstMultiQueue * mq, guint groupid);
static void single_queue_overrun_cb (GstDataQueue * dq, GstSingleQueue * sq);
static void single_queue_underrun_cb (GstDataQueue * dq, GstSingleQueue * sq);
static void update_buffering (GstMultiQueue * mq, GstSingleQueue * sq);
static void gst_multi_queue_post_buffering (GstMultiQueue * mq);
static void recheck_buffering_status (GstMultiQueue * mq);
static void gst_single_queue_flush_queue (GstSingleQueue * sq, gboolean full);
static void calculate_interleave (GstMultiQueue * mq, GstSingleQueue * sq);
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink_%u",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (multi_queue_debug);
#define GST_CAT_DEFAULT (multi_queue_debug)
/* Signals and args */
enum
{
SIGNAL_UNDERRUN,
SIGNAL_OVERRUN,
LAST_SIGNAL
};
/* default limits, we try to keep up to 2 seconds of data and if there is not
* time, up to 10 MB. The number of buffers is dynamically scaled to make sure
* there is data in the queues. Normally, the byte and time limits are not hit
* in theses conditions. */
#define DEFAULT_MAX_SIZE_BYTES 10 * 1024 * 1024 /* 10 MB */
#define DEFAULT_MAX_SIZE_BUFFERS 5
#define DEFAULT_MAX_SIZE_TIME 2 * GST_SECOND
/* second limits. When we hit one of the above limits we are probably dealing
* with a badly muxed file and we scale the limits to these emergency values.
* This is currently not yet implemented.
* Since we dynamically scale the queue buffer size up to the limits but avoid
* going above the max-size-buffers when we can, we don't really need this
* additional extra size. */
#define DEFAULT_EXTRA_SIZE_BYTES 10 * 1024 * 1024 /* 10 MB */
#define DEFAULT_EXTRA_SIZE_BUFFERS 5
#define DEFAULT_EXTRA_SIZE_TIME 3 * GST_SECOND
#define DEFAULT_USE_BUFFERING FALSE
#define DEFAULT_LOW_WATERMARK 0.01
#define DEFAULT_HIGH_WATERMARK 0.99
#define DEFAULT_SYNC_BY_RUNNING_TIME FALSE
#define DEFAULT_USE_INTERLEAVE FALSE
#define DEFAULT_UNLINKED_CACHE_TIME 250 * GST_MSECOND
#define DEFAULT_MINIMUM_INTERLEAVE (250 * GST_MSECOND)
enum
{
PROP_0,
PROP_EXTRA_SIZE_BYTES,
PROP_EXTRA_SIZE_BUFFERS,
PROP_EXTRA_SIZE_TIME,
PROP_MAX_SIZE_BYTES,
PROP_MAX_SIZE_BUFFERS,
PROP_MAX_SIZE_TIME,
PROP_USE_BUFFERING,
PROP_LOW_PERCENT,
PROP_HIGH_PERCENT,
PROP_LOW_WATERMARK,
PROP_HIGH_WATERMARK,
PROP_SYNC_BY_RUNNING_TIME,
PROP_USE_INTERLEAVE,
PROP_UNLINKED_CACHE_TIME,
PROP_MINIMUM_INTERLEAVE,
PROP_STATS,
PROP_LAST
};
/* Explanation for buffer levels and percentages:
*
* The buffering_level functions here return a value in a normalized range
* that specifies the current fill level of a queue. The range goes from 0 to
* MAX_BUFFERING_LEVEL. The low/high watermarks also use this same range.
*
* This is not to be confused with the buffering_percent value, which is
* a *relative* quantity - relative to the low/high watermarks.
* buffering_percent = 0% means overall buffering_level is at the low watermark.
* buffering_percent = 100% means overall buffering_level is at the high watermark.
* buffering_percent is used for determining if the fill level has reached
* the high watermark, and for producing BUFFERING messages. This value
* always uses a 0..100 range (since it is a percentage).
*
* To avoid future confusions, whenever "buffering level" is mentioned, it
* refers to the absolute level which is in the 0..MAX_BUFFERING_LEVEL
* range. Whenever "buffering_percent" is mentioned, it refers to the
* percentage value that is relative to the low/high watermark. */
/* Using a buffering level range of 0..1000000 to allow for a
* resolution in ppm (1 ppm = 0.0001%) */
#define MAX_BUFFERING_LEVEL 1000000
/* How much 1% makes up in the buffer level range */
#define BUF_LEVEL_PERCENT_FACTOR ((MAX_BUFFERING_LEVEL) / 100)
/* GstMultiQueuePad */
#define DEFAULT_PAD_GROUP_ID 0
enum
{
PROP_PAD_0,
PROP_PAD_GROUP_ID,
PROP_CURRENT_LEVEL_BUFFERS,
PROP_CURRENT_LEVEL_BYTES,
PROP_CURRENT_LEVEL_TIME,
};
#define GST_TYPE_MULTIQUEUE_PAD (gst_multiqueue_pad_get_type())
#define GST_MULTIQUEUE_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULTIQUEUE_PAD,GstMultiQueuePad))
#define GST_IS_MULTIQUEUE_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULTIQUEUE_PAD))
#define GST_MULTIQUEUE_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_MULTIQUEUE_PAD,GstMultiQueuePadClass))
#define GST_IS_MULTIQUEUE_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_MULTIQUEUE_PAD))
#define GST_MULTIQUEUE_PAD_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_MULTIQUEUE_PAD,GstMultiQueuePadClass))
#define GST_MULTI_QUEUE_MUTEX_LOCK(q) G_STMT_START { \
g_mutex_lock (&q->qlock); \
} G_STMT_END
#define GST_MULTI_QUEUE_MUTEX_UNLOCK(q) G_STMT_START { \
g_mutex_unlock (&q->qlock); \
} G_STMT_END
#define SET_PERCENT(mq, perc) G_STMT_START { \
if (perc != mq->buffering_percent) { \
mq->buffering_percent = perc; \
mq->buffering_percent_changed = TRUE; \
GST_DEBUG_OBJECT (mq, "buffering %d percent", perc); \
} \
} G_STMT_END
struct _GstMultiQueuePad
{
GstPad parent;
GstSingleQueue *sq;
};
struct _GstMultiQueuePadClass
{
GstPadClass parent_class;
};
GType gst_multiqueue_pad_get_type (void);
G_DEFINE_TYPE (GstMultiQueuePad, gst_multiqueue_pad, GST_TYPE_PAD);
static guint
gst_multiqueue_pad_get_group_id (GstMultiQueuePad * pad)
{
guint ret = 0;
GstMultiQueue *mq;
if (!pad->sq)
return 0;
mq = g_weak_ref_get (&pad->sq->mqueue);
if (mq) {
GST_OBJECT_LOCK (mq);
}
ret = pad->sq->groupid;
if (mq) {
GST_OBJECT_UNLOCK (mq);
gst_object_unref (mq);
}
return ret;
}
static guint
gst_multiqueue_pad_get_current_level_buffers (GstMultiQueuePad * pad)
{
GstSingleQueue *sq = pad->sq;
GstDataQueueSize level;
GstMultiQueue *mq;
if (!sq)
return 0;
mq = g_weak_ref_get (&pad->sq->mqueue);
if (mq) {
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
}
gst_data_queue_get_level (sq->queue, &level);
if (mq) {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_object_unref (mq);
}
return level.visible;
}
static guint
gst_multiqueue_pad_get_current_level_bytes (GstMultiQueuePad * pad)
{
GstSingleQueue *sq = pad->sq;
GstDataQueueSize level;
GstMultiQueue *mq;
if (!sq)
return 0;
mq = g_weak_ref_get (&pad->sq->mqueue);
if (mq) {
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
}
gst_data_queue_get_level (sq->queue, &level);
if (mq) {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_object_unref (mq);
}
return level.bytes;
}
static guint64
gst_multiqueue_pad_get_current_level_time (GstMultiQueuePad * pad)
{
GstSingleQueue *sq = pad->sq;
GstMultiQueue *mq;
guint64 ret;
if (!sq)
return 0;
mq = g_weak_ref_get (&pad->sq->mqueue);
if (mq) {
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
}
ret = sq->cur_time;
if (mq) {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_object_unref (mq);
}
return ret;
}
static void
gst_multiqueue_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMultiQueuePad *pad = GST_MULTIQUEUE_PAD (object);
switch (prop_id) {
case PROP_PAD_GROUP_ID:
g_value_set_uint (value, gst_multiqueue_pad_get_group_id (pad));
break;
case PROP_CURRENT_LEVEL_BUFFERS:{
g_value_set_uint (value,
gst_multiqueue_pad_get_current_level_buffers (pad));
break;
}
case PROP_CURRENT_LEVEL_BYTES:{
g_value_set_uint (value,
gst_multiqueue_pad_get_current_level_bytes (pad));
break;
}
case PROP_CURRENT_LEVEL_TIME:{
g_value_set_uint64 (value,
gst_multiqueue_pad_get_current_level_time (pad));
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_multiqueue_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMultiQueuePad *pad = GST_MULTIQUEUE_PAD (object);
switch (prop_id) {
case PROP_PAD_GROUP_ID:
if (pad->sq) {
GstMultiQueue *mqueue = g_weak_ref_get (&pad->sq->mqueue);
if (mqueue)
GST_OBJECT_LOCK (mqueue);
pad->sq->groupid = g_value_get_uint (value);
if (mqueue) {
GST_OBJECT_UNLOCK (mqueue);
gst_object_unref (mqueue);
}
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_multiqueue_pad_finalize (GObject * object)
{
GstMultiQueuePad *pad = GST_MULTIQUEUE_PAD (object);
if (pad->sq)
gst_single_queue_unref (pad->sq);
G_OBJECT_CLASS (gst_multiqueue_pad_parent_class)->finalize (object);
}
static void
gst_multiqueue_pad_class_init (GstMultiQueuePadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_multiqueue_pad_set_property;
gobject_class->get_property = gst_multiqueue_pad_get_property;
gobject_class->finalize = gst_multiqueue_pad_finalize;
/**
* GstMultiQueuePad:group-id:
*
* Group to which this pad belongs.
*
* Since: 1.10
*/
g_object_class_install_property (gobject_class, PROP_PAD_GROUP_ID,
g_param_spec_uint ("group-id", "Group ID",
"Group to which this pad belongs", 0, G_MAXUINT32,
DEFAULT_PAD_GROUP_ID, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueuePad:current-level-buffers:
*
* The corresponding queue's current level of buffers.
*
* Since: 1.18
*/
g_object_class_install_property (gobject_class, PROP_CURRENT_LEVEL_BUFFERS,
g_param_spec_uint ("current-level-buffers", "Current level buffers",
"Current level buffers", 0, G_MAXUINT32,
0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueuePad:current-level-bytes:
*
* The corresponding queue's current level of bytes.
*
* Since: 1.18
*/
g_object_class_install_property (gobject_class, PROP_CURRENT_LEVEL_BYTES,
g_param_spec_uint ("current-level-bytes", "Current level bytes",
"Current level bytes", 0, G_MAXUINT32,
0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueuePad:current-level-time:
*
* The corresponding queue's current level of time.
*
* Since: 1.18
*/
g_object_class_install_property (gobject_class, PROP_CURRENT_LEVEL_TIME,
g_param_spec_uint64 ("current-level-time", "Current level time",
"Current level time", 0, G_MAXUINT64,
0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
}
static void
gst_multiqueue_pad_init (GstMultiQueuePad * pad)
{
}
/* Convenience function */
static inline GstClockTimeDiff
my_segment_to_running_time (GstSegment * segment, GstClockTime val)
{
GstClockTimeDiff res = GST_CLOCK_STIME_NONE;
if (GST_CLOCK_TIME_IS_VALID (val)) {
gboolean sign =
gst_segment_to_running_time_full (segment, GST_FORMAT_TIME, val, &val);
if (sign > 0)
res = val;
else if (sign < 0)
res = -val;
}
return res;
}
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, const GstCaps * caps);
static void gst_multi_queue_release_pad (GstElement * element, GstPad * pad);
static GstStateChangeReturn gst_multi_queue_change_state (GstElement *
element, GstStateChange transition);
static void gst_multi_queue_loop (GstPad * pad);
#define _do_init \
GST_DEBUG_CATEGORY_INIT (multi_queue_debug, "multiqueue", 0, "multiqueue element");
#define gst_multi_queue_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstMultiQueue, gst_multi_queue, GST_TYPE_ELEMENT,
_do_init);
static guint gst_multi_queue_signals[LAST_SIGNAL] = { 0 };
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_multi_queue_set_property;
gobject_class->get_property = gst_multi_queue_get_property;
/* SIGNALS */
/**
* GstMultiQueue::underrun:
* @multiqueue: the multiqueue instance
*
* This signal is emitted from the streaming thread when there is
* no data in any of the queues inside the multiqueue instance (underrun).
*
* This indicates either starvation or EOS from the upstream data sources.
*/
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,
NULL, G_TYPE_NONE, 0);
/**
* GstMultiQueue::overrun:
* @multiqueue: the multiqueue instance
*
* Reports that one of the queues in the multiqueue is full (overrun).
* A queue is full if the total amount of data inside it (num-buffers, time,
* size) is higher than the boundary values which can be set through the
* GObject properties.
*
* This can be used as an indicator of pre-roll.
*/
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,
NULL, G_TYPE_NONE, 0);
/* PROPERTIES */
g_object_class_install_property (gobject_class, PROP_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 | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_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 | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_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 | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_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)"
" (NOT IMPLEMENTED)",
0, G_MAXUINT, DEFAULT_EXTRA_SIZE_BYTES,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_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)"
" (NOT IMPLEMENTED)",
0, G_MAXUINT, DEFAULT_EXTRA_SIZE_BUFFERS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_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)"
" (NOT IMPLEMENTED)",
0, G_MAXUINT64, DEFAULT_EXTRA_SIZE_TIME,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueue:use-buffering:
*
* Enable the buffering option in multiqueue so that BUFFERING messages are
* emitted based on low-/high-percent thresholds.
*/
g_object_class_install_property (gobject_class, PROP_USE_BUFFERING,
g_param_spec_boolean ("use-buffering", "Use buffering",
"Emit GST_MESSAGE_BUFFERING based on low-/high-percent thresholds "
"(0% = low-watermark, 100% = high-watermark)",
DEFAULT_USE_BUFFERING, G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueue:low-percent:
*
* Low threshold percent for buffering to start.
*/
g_object_class_install_property (gobject_class, PROP_LOW_PERCENT,
g_param_spec_int ("low-percent", "Low percent",
"Low threshold for buffering to start. Only used if use-buffering is True "
"(Deprecated: use low-watermark instead)",
0, 100, DEFAULT_LOW_WATERMARK * 100,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueue:high-percent:
*
* High threshold percent for buffering to finish.
*/
g_object_class_install_property (gobject_class, PROP_HIGH_PERCENT,
g_param_spec_int ("high-percent", "High percent",
"High threshold for buffering to finish. Only used if use-buffering is True "
"(Deprecated: use high-watermark instead)",
0, 100, DEFAULT_HIGH_WATERMARK * 100,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueue:low-watermark:
*
* Low threshold watermark for buffering to start.
*
* Since: 1.10
*/
g_object_class_install_property (gobject_class, PROP_LOW_WATERMARK,
g_param_spec_double ("low-watermark", "Low watermark",
"Low threshold for buffering to start. Only used if use-buffering is True",
0.0, 1.0, DEFAULT_LOW_WATERMARK,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueue:high-watermark:
*
* High threshold watermark for buffering to finish.
*
* Since: 1.10
*/
g_object_class_install_property (gobject_class, PROP_HIGH_WATERMARK,
g_param_spec_double ("high-watermark", "High watermark",
"High threshold for buffering to finish. Only used if use-buffering is True",
0.0, 1.0, DEFAULT_HIGH_WATERMARK,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueue:sync-by-running-time:
*
* If enabled multiqueue will synchronize deactivated or not-linked streams
* to the activated and linked streams by taking the running time.
* Otherwise multiqueue will synchronize the deactivated or not-linked
* streams by keeping the order in which buffers and events arrived compared
* to active and linked streams.
*/
g_object_class_install_property (gobject_class, PROP_SYNC_BY_RUNNING_TIME,
g_param_spec_boolean ("sync-by-running-time", "Sync By Running Time",
"Synchronize deactivated or not-linked streams by running time",
DEFAULT_SYNC_BY_RUNNING_TIME,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_USE_INTERLEAVE,
g_param_spec_boolean ("use-interleave", "Use interleave",
"Adjust time limits based on input interleave",
DEFAULT_USE_INTERLEAVE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_UNLINKED_CACHE_TIME,
g_param_spec_uint64 ("unlinked-cache-time", "Unlinked cache time (ns)",
"Extra buffering in time for unlinked streams (if 'sync-by-running-time')",
0, G_MAXUINT64, DEFAULT_UNLINKED_CACHE_TIME,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MINIMUM_INTERLEAVE,
g_param_spec_uint64 ("min-interleave-time", "Minimum interleave time",
"Minimum extra buffering for deinterleaving (size of the queues) when use-interleave=true",
0, G_MAXUINT64, DEFAULT_MINIMUM_INTERLEAVE,
G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
G_PARAM_STATIC_STRINGS));
/**
* GstMultiQueue:stats:
*
* Various #GstMultiQueue statistics. This property returns a #GstStructure
* with name "application/x-gst-multi-queue-stats" with the following fields:
*
* - "queues" GST_TYPE_ARRAY Contains one GstStructure named "queue_%d"
* (where \%d is the queue's ID) per internal queue:
* - "buffers" G_TYPE_UINT The queue's current level of buffers
* - "bytes" G_TYPE_UINT The queue's current level of bytes
* - "time" G_TYPE_UINT64 The queue's current level of time
*
* Since: 1.18
*/
g_object_class_install_property (gobject_class, PROP_STATS,
g_param_spec_boxed ("stats", "Stats",
"Multiqueue Statistics",
GST_TYPE_STRUCTURE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gobject_class->finalize = gst_multi_queue_finalize;
gst_element_class_set_static_metadata (gstelement_class,
"MultiQueue",
"Generic", "Multiple data queue", "Edward Hervey <edward@fluendo.com>");
gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
&sinktemplate, GST_TYPE_MULTIQUEUE_PAD);
gst_element_class_add_static_pad_template_with_gtype (gstelement_class,
&srctemplate, GST_TYPE_MULTIQUEUE_PAD);
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);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_multi_queue_change_state);
}
static void
gst_multi_queue_init (GstMultiQueue * mqueue)
{
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->use_buffering = DEFAULT_USE_BUFFERING;
mqueue->low_watermark = DEFAULT_LOW_WATERMARK * MAX_BUFFERING_LEVEL;
mqueue->high_watermark = DEFAULT_HIGH_WATERMARK * MAX_BUFFERING_LEVEL;
mqueue->sync_by_running_time = DEFAULT_SYNC_BY_RUNNING_TIME;
mqueue->use_interleave = DEFAULT_USE_INTERLEAVE;
mqueue->min_interleave_time = DEFAULT_MINIMUM_INTERLEAVE;
mqueue->unlinked_cache_time = DEFAULT_UNLINKED_CACHE_TIME;
mqueue->counter = 1;
mqueue->highid = -1;
mqueue->high_time = GST_CLOCK_STIME_NONE;
g_mutex_init (&mqueue->qlock);
g_mutex_init (&mqueue->buffering_post_lock);
}
static void
gst_multi_queue_finalize (GObject * object)
{
GstMultiQueue *mqueue = GST_MULTI_QUEUE (object);
g_list_free_full (mqueue->queues, (GDestroyNotify) gst_single_queue_unref);
mqueue->queues = NULL;
mqueue->queues_cookie++;
/* free/unref instance data */
g_mutex_clear (&mqueue->qlock);
g_mutex_clear (&mqueue->buffering_post_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
#define SET_CHILD_PROPERTY(mq,format) G_STMT_START { \
GList * tmp = mq->queues; \
while (tmp) { \
GstSingleQueue *q = (GstSingleQueue*)tmp->data; \
q->max_size.format = mq->max_size.format; \
update_buffering (mq, q); \
gst_data_queue_limits_changed (q->queue); \
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 PROP_MAX_SIZE_BYTES:
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
mq->max_size.bytes = g_value_get_uint (value);
SET_CHILD_PROPERTY (mq, bytes);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
break;
case PROP_MAX_SIZE_BUFFERS:
{
GList *tmp;
gint new_size = g_value_get_uint (value);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
mq->max_size.visible = new_size;
tmp = mq->queues;
while (tmp) {
GstDataQueueSize size;
GstSingleQueue *q = (GstSingleQueue *) tmp->data;
gst_data_queue_get_level (q->queue, &size);
GST_DEBUG_OBJECT (mq, "Queue %d: Requested buffers size: %d,"
" current: %d, current max %d", q->id, new_size, size.visible,
q->max_size.visible);
/* do not reduce max size below current level if the single queue
* has grown because of empty queue */
if (new_size == 0) {
q->max_size.visible = new_size;
} else if (q->max_size.visible == 0) {
q->max_size.visible = MAX (new_size, size.visible);
} else if (new_size > size.visible) {
q->max_size.visible = new_size;
}
update_buffering (mq, q);
gst_data_queue_limits_changed (q->queue);
tmp = g_list_next (tmp);
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
break;
}
case PROP_MAX_SIZE_TIME:
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
mq->max_size.time = g_value_get_uint64 (value);
SET_CHILD_PROPERTY (mq, time);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
break;
case PROP_EXTRA_SIZE_BYTES:
mq->extra_size.bytes = g_value_get_uint (value);
break;
case PROP_EXTRA_SIZE_BUFFERS:
mq->extra_size.visible = g_value_get_uint (value);
break;
case PROP_EXTRA_SIZE_TIME:
mq->extra_size.time = g_value_get_uint64 (value);
break;
case PROP_USE_BUFFERING:
mq->use_buffering = g_value_get_boolean (value);
recheck_buffering_status (mq);
break;
case PROP_LOW_PERCENT:
mq->low_watermark = g_value_get_int (value) * BUF_LEVEL_PERCENT_FACTOR;
/* Recheck buffering status - the new low_watermark value might
* be above the current fill level. If the old low_watermark one
* was below the current level, this means that mq->buffering is
* disabled and needs to be re-enabled. */
recheck_buffering_status (mq);
break;
case PROP_HIGH_PERCENT:
mq->high_watermark = g_value_get_int (value) * BUF_LEVEL_PERCENT_FACTOR;
recheck_buffering_status (mq);
break;
case PROP_LOW_WATERMARK:
mq->low_watermark = g_value_get_double (value) * MAX_BUFFERING_LEVEL;
recheck_buffering_status (mq);
break;
case PROP_HIGH_WATERMARK:
mq->high_watermark = g_value_get_double (value) * MAX_BUFFERING_LEVEL;
recheck_buffering_status (mq);
break;
case PROP_SYNC_BY_RUNNING_TIME:
mq->sync_by_running_time = g_value_get_boolean (value);
break;
case PROP_USE_INTERLEAVE:
mq->use_interleave = g_value_get_boolean (value);
break;
case PROP_UNLINKED_CACHE_TIME:
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
mq->unlinked_cache_time = g_value_get_uint64 (value);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
break;
case PROP_MINIMUM_INTERLEAVE:
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
mq->min_interleave_time = g_value_get_uint64 (value);
if (mq->use_interleave)
calculate_interleave (mq, NULL);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* Called with mutex held */
static GstStructure *
gst_multi_queue_get_stats (GstMultiQueue * mq)
{
GstStructure *ret =
gst_structure_new_empty ("application/x-gst-multi-queue-stats");
GList *tmp;
GstSingleQueue *sq;
if (mq->queues != NULL) {
GValue queues = G_VALUE_INIT;
GValue v = G_VALUE_INIT;
g_value_init (&queues, GST_TYPE_ARRAY);
for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
GstDataQueueSize level;
GstStructure *s;
gchar *id;
g_value_init (&v, GST_TYPE_STRUCTURE);
sq = (GstSingleQueue *) tmp->data;
gst_data_queue_get_level (sq->queue, &level);
id = g_strdup_printf ("queue_%d", sq->id);
s = gst_structure_new (id,
"buffers", G_TYPE_UINT, level.visible,
"bytes", G_TYPE_UINT, level.bytes,
"time", G_TYPE_UINT64, sq->cur_time, NULL);
g_value_take_boxed (&v, s);
gst_value_array_append_and_take_value (&queues, &v);
g_free (id);
}
gst_structure_take_value (ret, "queues", &queues);
}
return ret;
}
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 PROP_EXTRA_SIZE_BYTES:
g_value_set_uint (value, mq->extra_size.bytes);
break;
case PROP_EXTRA_SIZE_BUFFERS:
g_value_set_uint (value, mq->extra_size.visible);
break;
case PROP_EXTRA_SIZE_TIME:
g_value_set_uint64 (value, mq->extra_size.time);
break;
case PROP_MAX_SIZE_BYTES:
g_value_set_uint (value, mq->max_size.bytes);
break;
case PROP_MAX_SIZE_BUFFERS:
g_value_set_uint (value, mq->max_size.visible);
break;
case PROP_MAX_SIZE_TIME:
g_value_set_uint64 (value, mq->max_size.time);
break;
case PROP_USE_BUFFERING:
g_value_set_boolean (value, mq->use_buffering);
break;
case PROP_LOW_PERCENT:
g_value_set_int (value, mq->low_watermark / BUF_LEVEL_PERCENT_FACTOR);
break;
case PROP_HIGH_PERCENT:
g_value_set_int (value, mq->high_watermark / BUF_LEVEL_PERCENT_FACTOR);
break;
case PROP_LOW_WATERMARK:
g_value_set_double (value, mq->low_watermark /
(gdouble) MAX_BUFFERING_LEVEL);
break;
case PROP_HIGH_WATERMARK:
g_value_set_double (value, mq->high_watermark /
(gdouble) MAX_BUFFERING_LEVEL);
break;
case PROP_SYNC_BY_RUNNING_TIME:
g_value_set_boolean (value, mq->sync_by_running_time);
break;
case PROP_USE_INTERLEAVE:
g_value_set_boolean (value, mq->use_interleave);
break;
case PROP_UNLINKED_CACHE_TIME:
g_value_set_uint64 (value, mq->unlinked_cache_time);
break;
case PROP_MINIMUM_INTERLEAVE:
g_value_set_uint64 (value, mq->min_interleave_time);
break;
case PROP_STATS:
g_value_take_boxed (value, gst_multi_queue_get_stats (mq));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
}
static GstIterator *
gst_multi_queue_iterate_internal_links (GstPad * pad, GstObject * parent)
{
GstIterator *it = NULL;
GstPad *opad, *sinkpad, *srcpad;
GstSingleQueue *squeue;
GstMultiQueue *mq = GST_MULTI_QUEUE (parent);
GValue val = { 0, };
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
squeue = GST_MULTIQUEUE_PAD (pad)->sq;
if (!squeue)
goto out;
srcpad = g_weak_ref_get (&squeue->srcpad);
sinkpad = g_weak_ref_get (&squeue->sinkpad);
if (sinkpad == pad) {
opad = srcpad;
gst_clear_object (&sinkpad);
} else if (srcpad == pad) {
opad = sinkpad;
gst_clear_object (&srcpad);
} else {
gst_clear_object (&srcpad);
gst_clear_object (&sinkpad);
goto out;
}
g_value_init (&val, GST_TYPE_PAD);
g_value_set_object (&val, opad);
it = gst_iterator_new_single (GST_TYPE_PAD, &val);
g_value_unset (&val);
gst_object_unref (opad);
out:
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
return it;
}
/*
* GstElement methods
*/
static GstPad *
gst_multi_queue_request_new_pad (GstElement * element, GstPadTemplate * temp,
const gchar * name, const GstCaps * caps)
{
GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
GstSingleQueue *squeue;
GstPad *new_pad;
guint temp_id = -1;
if (name) {
sscanf (name + 4, "_%u", &temp_id);
GST_LOG_OBJECT (element, "name : %s (id %d)", GST_STR_NULL (name), temp_id);
}
/* Create a new single queue, add the sink and source pad and return the sink pad */
squeue = gst_single_queue_new (mqueue, temp_id);
new_pad = squeue ? g_weak_ref_get (&squeue->sinkpad) : NULL;
/* request pad assumes the element is owning the ref of the pad it returns */
if (new_pad)
gst_object_unref (new_pad);
GST_DEBUG_OBJECT (mqueue, "Returning pad %" GST_PTR_FORMAT, new_pad);
return new_pad;
}
static void
gst_multi_queue_release_pad (GstElement * element, GstPad * pad)
{
GstPad *sinkpad = NULL, *srcpad = NULL;
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;
sinkpad = g_weak_ref_get (&sq->sinkpad);
if (sinkpad == pad) {
srcpad = g_weak_ref_get (&sq->srcpad);
break;
}
gst_object_unref (sinkpad);
}
if (!tmp) {
gst_clear_object (&sinkpad);
gst_clear_object (&srcpad);
GST_WARNING_OBJECT (mqueue, "That pad doesn't belong to this element ???");
GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
return;
}
/* FIXME: The removal of the singlequeue should probably not happen until it
* finishes draining */
/* remove it from the list */
mqueue->queues = g_list_delete_link (mqueue->queues, tmp);
mqueue->queues_cookie++;
/* FIXME : recompute next-non-linked */
GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
/* delete SingleQueue */
gst_data_queue_set_flushing (sq->queue, TRUE);
gst_pad_set_active (srcpad, FALSE);
gst_pad_set_active (sinkpad, FALSE);
gst_element_remove_pad (element, srcpad);
gst_element_remove_pad (element, sinkpad);
gst_object_unref (srcpad);
gst_object_unref (sinkpad);
}
static GstStateChangeReturn
gst_multi_queue_change_state (GstElement * element, GstStateChange transition)
{
GstMultiQueue *mqueue = GST_MULTI_QUEUE (element);
GstSingleQueue *sq = NULL;
GstStateChangeReturn result;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:{
GList *tmp;
/* Set all pads to non-flushing */
GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
sq = (GstSingleQueue *) tmp->data;
sq->flushing = FALSE;
}
/* the visible limit might not have been set on single queues that have grown because of other queueus were empty */
SET_CHILD_PROPERTY (mqueue, visible);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
gst_multi_queue_post_buffering (mqueue);
break;
}
case GST_STATE_CHANGE_PAUSED_TO_READY:{
GList *tmp;
/* Un-wait all waiting pads */
GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
sq = (GstSingleQueue *) tmp->data;
sq->flushing = TRUE;
g_cond_signal (&sq->turn);
sq->last_query = FALSE;
g_cond_signal (&sq->query_handled);
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
break;
}
default:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
default:
break;
}
return result;
}
static gboolean
gst_single_queue_start (GstMultiQueue * mq, GstSingleQueue * sq)
{
gboolean res = FALSE;
GstPad *srcpad = g_weak_ref_get (&sq->srcpad);
GST_LOG_OBJECT (mq, "SingleQueue %d : starting task", sq->id);
if (srcpad) {
res = gst_pad_start_task (srcpad,
(GstTaskFunction) gst_multi_queue_loop, srcpad, NULL);
gst_object_unref (srcpad);
}
return res;
}
static gboolean
gst_single_queue_pause (GstMultiQueue * mq, GstSingleQueue * sq)
{
gboolean result = FALSE;
GstPad *srcpad = g_weak_ref_get (&sq->srcpad);
GST_LOG_OBJECT (mq, "SingleQueue %d : pausing task", sq->id);
if (srcpad) {
result = gst_pad_pause_task (srcpad);
gst_object_unref (srcpad);
}
sq->sink_tainted = sq->src_tainted = TRUE;
return result;
}
static gboolean
gst_single_queue_stop (GstMultiQueue * mq, GstSingleQueue * sq)
{
gboolean result = FALSE;
GstPad *srcpad = g_weak_ref_get (&sq->srcpad);
GST_LOG_OBJECT (mq, "SingleQueue %d : stopping task", sq->id);
if (srcpad) {
result = gst_pad_stop_task (srcpad);
gst_object_unref (srcpad);
}
sq->sink_tainted = sq->src_tainted = TRUE;
return result;
}
static void
gst_single_queue_flush (GstMultiQueue * mq, GstSingleQueue * sq, gboolean flush,
gboolean full)
{
GST_DEBUG_OBJECT (mq, "flush %s queue %d", (flush ? "start" : "stop"),
sq->id);
if (flush) {
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
sq->srcresult = GST_FLOW_FLUSHING;
gst_data_queue_set_flushing (sq->queue, TRUE);
sq->flushing = TRUE;
/* wake up non-linked task */
GST_LOG_OBJECT (mq, "SingleQueue %d : waking up eventually waiting task",
sq->id);
g_cond_signal (&sq->turn);
sq->last_query = FALSE;
g_cond_signal (&sq->query_handled);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
} else {
gst_single_queue_flush_queue (sq, full);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
gst_segment_init (&sq->sink_segment, GST_FORMAT_TIME);
gst_segment_init (&sq->src_segment, GST_FORMAT_TIME);
sq->has_src_segment = FALSE;
/* All pads start off not-linked for a smooth kick-off */
sq->srcresult = GST_FLOW_OK;
sq->pushed = FALSE;
sq->cur_time = 0;
sq->max_size.visible = mq->max_size.visible;
sq->is_eos = FALSE;
sq->is_segment_done = FALSE;
sq->nextid = 0;
sq->oldid = 0;
sq->last_oldid = G_MAXUINT32;
sq->next_time = GST_CLOCK_STIME_NONE;
sq->last_time = GST_CLOCK_STIME_NONE;
sq->cached_sinktime = GST_CLOCK_STIME_NONE;
sq->group_high_time = GST_CLOCK_STIME_NONE;
gst_data_queue_set_flushing (sq->queue, FALSE);
/* We will become active again on the next buffer/gap */
sq->active = FALSE;
/* Reset high time to be recomputed next */
mq->high_time = GST_CLOCK_STIME_NONE;
sq->flushing = FALSE;
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
}
}
/* WITH LOCK TAKEN */
static gint
get_buffering_level (GstMultiQueue * mq, GstSingleQueue * sq)
{
GstDataQueueSize size;
gint buffering_level, tmp;
gst_data_queue_get_level (sq->queue, &size);
GST_DEBUG_OBJECT (mq,
"queue %d: visible %u/%u, bytes %u/%u, time %" G_GUINT64_FORMAT "/%"
G_GUINT64_FORMAT, sq->id, size.visible, sq->max_size.visible,
size.bytes, sq->max_size.bytes, sq->cur_time, sq->max_size.time);
/* get bytes and time buffer levels and take the max */
if (sq->is_eos || sq->is_segment_done || sq->srcresult == GST_FLOW_NOT_LINKED
|| sq->is_sparse) {
buffering_level = MAX_BUFFERING_LEVEL;
} else {
buffering_level = 0;
if (sq->max_size.time > 0) {
tmp =
gst_util_uint64_scale (sq->cur_time,
MAX_BUFFERING_LEVEL, sq->max_size.time);
buffering_level = MAX (buffering_level, tmp);
}
if (sq->max_size.bytes > 0) {
tmp =
gst_util_uint64_scale_int (size.bytes,
MAX_BUFFERING_LEVEL, sq->max_size.bytes);
buffering_level = MAX (buffering_level, tmp);
}
}
return buffering_level;
}
/* WITH LOCK TAKEN */
static void
update_buffering (GstMultiQueue * mq, GstSingleQueue * sq)
{
gint buffering_level, percent;
/* nothing to dowhen we are not in buffering mode */
if (!mq->use_buffering)
return;
buffering_level = get_buffering_level (mq, sq);
/* scale so that if buffering_level equals the high watermark,
* the percentage is 100% */
percent = gst_util_uint64_scale (buffering_level, 100, mq->high_watermark);
/* clip */
if (percent > 100)
percent = 100;
if (mq->buffering) {
if (buffering_level >= mq->high_watermark) {
mq->buffering = FALSE;
}
/* make sure it increases */
percent = MAX (mq->buffering_percent, percent);
SET_PERCENT (mq, percent);
} else {
GList *iter;
gboolean is_buffering = TRUE;
for (iter = mq->queues; iter; iter = g_list_next (iter)) {
GstSingleQueue *oq = (GstSingleQueue *) iter->data;
if (get_buffering_level (mq, oq) >= mq->high_watermark) {
is_buffering = FALSE;
break;
}
}
if (is_buffering && buffering_level < mq->low_watermark) {
mq->buffering = TRUE;
SET_PERCENT (mq, percent);
}
}
}
static void
gst_multi_queue_post_buffering (GstMultiQueue * mq)
{
GstMessage *msg = NULL;
g_mutex_lock (&mq->buffering_post_lock);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (mq->buffering_percent_changed) {
gint percent = mq->buffering_percent;
mq->buffering_percent_changed = FALSE;
GST_DEBUG_OBJECT (mq, "Going to post buffering: %d%%", percent);
msg = gst_message_new_buffering (GST_OBJECT_CAST (mq), percent);
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
if (msg != NULL)
gst_element_post_message (GST_ELEMENT_CAST (mq), msg);
g_mutex_unlock (&mq->buffering_post_lock);
}
static void
recheck_buffering_status (GstMultiQueue * mq)
{
if (!mq->use_buffering && mq->buffering) {
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
mq->buffering = FALSE;
GST_DEBUG_OBJECT (mq,
"Buffering property disabled, but queue was still buffering; "
"setting buffering percentage to 100%%");
SET_PERCENT (mq, 100);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
}
if (mq->use_buffering) {
GList *tmp;
gint old_perc;
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
/* force buffering percentage to be recalculated */
old_perc = mq->buffering_percent;
mq->buffering_percent = 0;
tmp = mq->queues;
while (tmp) {
GstSingleQueue *q = (GstSingleQueue *) tmp->data;
update_buffering (mq, q);
gst_data_queue_limits_changed (q->queue);
tmp = g_list_next (tmp);
}
GST_DEBUG_OBJECT (mq,
"Recalculated buffering percentage: old: %d%% new: %d%%",
old_perc, mq->buffering_percent);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
}
gst_multi_queue_post_buffering (mq);
}
static void
calculate_interleave (GstMultiQueue * mq, GstSingleQueue * sq)
{
GstClockTimeDiff low, high;
GstClockTime interleave, other_interleave = 0;
GList *tmp;
low = high = GST_CLOCK_STIME_NONE;
interleave = mq->interleave;
/* Go over all single queues and calculate lowest/highest value */
for (tmp = mq->queues; tmp; tmp = tmp->next) {
GstSingleQueue *oq = (GstSingleQueue *) tmp->data;
/* Ignore sparse streams for interleave calculation */
if (oq->is_sparse)
continue;
/* If a stream is not active yet (hasn't received any buffers), set
* a maximum interleave to allow it to receive more data */
if (!oq->active) {
GST_LOG_OBJECT (mq,
"queue %d is not active yet, forcing interleave to 5s", oq->id);
mq->interleave = 5 * GST_SECOND;
/* Update max-size time */
mq->max_size.time = mq->interleave;
SET_CHILD_PROPERTY (mq, time);
goto beach;
}
/* Calculate within each streaming thread */
if (sq && sq->thread != oq->thread) {
if (oq->interleave > other_interleave)
other_interleave = oq->interleave;
continue;
}
if (GST_CLOCK_STIME_IS_VALID (oq->cached_sinktime)) {
if (low == GST_CLOCK_STIME_NONE || oq->cached_sinktime < low)
low = oq->cached_sinktime;
if (high == GST_CLOCK_STIME_NONE || oq->cached_sinktime > high)
high = oq->cached_sinktime;
}
GST_LOG_OBJECT (mq,
"queue %d , sinktime:%" GST_STIME_FORMAT " low:%" GST_STIME_FORMAT
" high:%" GST_STIME_FORMAT, oq->id,
GST_STIME_ARGS (oq->cached_sinktime), GST_STIME_ARGS (low),
GST_STIME_ARGS (high));
}
if (GST_CLOCK_STIME_IS_VALID (low) && GST_CLOCK_STIME_IS_VALID (high)) {
interleave = high - low;
/* Padding of interleave and minimum value */
interleave = (150 * interleave / 100) + mq->min_interleave_time;
if (sq)
sq->interleave = interleave;
interleave = MAX (interleave, other_interleave);
/* Update the stored interleave if:
* * No data has arrived yet (high == low)
* * Or it went higher
* * Or it went lower and we've gone past the previous interleave needed */
if (high == low || interleave > mq->interleave ||
((mq->last_interleave_update + (2 * MIN (GST_SECOND,
mq->interleave)) < low)
&& interleave < (mq->interleave * 3 / 4))) {
/* Update the interleave */
mq->interleave = interleave;
mq->last_interleave_update = high;
/* Update max-size time */
mq->max_size.time = mq->interleave;
SET_CHILD_PROPERTY (mq, time);
}
}
beach:
GST_DEBUG_OBJECT (mq,
"low:%" GST_STIME_FORMAT " high:%" GST_STIME_FORMAT " interleave:%"
GST_TIME_FORMAT " mq->interleave:%" GST_TIME_FORMAT
" last_interleave_update:%" GST_STIME_FORMAT, GST_STIME_ARGS (low),
GST_STIME_ARGS (high), GST_TIME_ARGS (interleave),
GST_TIME_ARGS (mq->interleave),
GST_STIME_ARGS (mq->last_interleave_update));
}
/* calculate the diff between running time on the sink and src of the queue.
* This is the total amount of time in the queue.
* WITH LOCK TAKEN */
static void
update_time_level (GstMultiQueue * mq, GstSingleQueue * sq)
{
GstClockTimeDiff sink_time, src_time;
if (sq->sink_tainted) {
sink_time = sq->sinktime = my_segment_to_running_time (&sq->sink_segment,
sq->sink_segment.position);
GST_DEBUG_OBJECT (mq,
"queue %d sink_segment.position:%" GST_TIME_FORMAT ", sink_time:%"
GST_STIME_FORMAT, sq->id, GST_TIME_ARGS (sq->sink_segment.position),
GST_STIME_ARGS (sink_time));
if (G_UNLIKELY (sq->last_time == GST_CLOCK_STIME_NONE)) {
/* If the single queue still doesn't have a last_time set, this means
* that nothing has been pushed out yet.
* In order for the high_time computation to be as efficient as possible,
* we set the last_time */
sq->last_time = sink_time;
}
if (G_UNLIKELY (sink_time != GST_CLOCK_STIME_NONE)) {
/* if we have a time, we become untainted and use the time */
sq->sink_tainted = FALSE;
if (mq->use_interleave) {
sq->cached_sinktime = sink_time;
calculate_interleave (mq, sq);
}
}
} else
sink_time = sq->sinktime;
if (sq->src_tainted) {
GstSegment *segment;
gint64 position;
if (sq->has_src_segment) {
segment = &sq->src_segment;
position = sq->src_segment.position;
} else {
/*
* If the src pad had no segment yet, use the sink segment
* to avoid signalling overrun if the received sink segment has a
* a position > max-size-time while the src pad time would be the default=0
*
* This can happen when switching pads on chained/adaptive streams and the
* new chain has a segment with a much larger position
*/
segment = &sq->sink_segment;
position = sq->sink_segment.position;
}
src_time = sq->srctime = my_segment_to_running_time (segment, position);
/* if we have a time, we become untainted and use the time */
if (G_UNLIKELY (src_time != GST_CLOCK_STIME_NONE)) {
sq->src_tainted = FALSE;
}
} else
src_time = sq->srctime;
GST_DEBUG_OBJECT (mq,
"queue %d, sink %" GST_STIME_FORMAT ", src %" GST_STIME_FORMAT, sq->id,
GST_STIME_ARGS (sink_time), GST_STIME_ARGS (src_time));
/* This allows for streams with out of order timestamping - sometimes the
* emerging timestamp is later than the arriving one(s) */
if (G_LIKELY (GST_CLOCK_STIME_IS_VALID (sink_time) &&
GST_CLOCK_STIME_IS_VALID (src_time) && sink_time > src_time))
sq->cur_time = sink_time - src_time;
else
sq->cur_time = 0;
/* updating the time level can change the buffering state */
update_buffering (mq, sq);
return;
}
/* take a SEGMENT event and apply the values to segment, updating the time
* level of queue. */
static void
apply_segment (GstMultiQueue * mq, GstSingleQueue * sq, GstEvent * event,
GstSegment * segment)
{
gst_event_copy_segment (event, segment);
/* now configure the values, we use these to track timestamps on the
* sinkpad. */
if (segment->format != GST_FORMAT_TIME) {
/* non-time format, pretent the current time segment is closed with a
* 0 start and unknown stop time. */
segment->format = GST_FORMAT_TIME;
segment->start = 0;
segment->stop = -1;
segment->time = 0;
}
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
/* Make sure we have a valid initial segment position (and not garbage
* from upstream) */
if (segment->rate > 0.0)
segment->position = segment->start;
else
segment->position = segment->stop;
if (segment == &sq->sink_segment)
sq->sink_tainted = TRUE;
else {
sq->has_src_segment = TRUE;
sq->src_tainted = TRUE;
}
GST_DEBUG_OBJECT (mq,
"queue %d, configured SEGMENT %" GST_SEGMENT_FORMAT, sq->id, segment);
/* segment can update the time level of the queue */
update_time_level (mq, sq);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
}
/* take a buffer and update segment, updating the time level of the queue. */
static void
apply_buffer (GstMultiQueue * mq, GstSingleQueue * sq, GstClockTime timestamp,
GstClockTime duration, GstSegment * segment)
{
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
/* if no timestamp is set, assume it's continuous with the previous
* time */
if (timestamp == GST_CLOCK_TIME_NONE)
timestamp = segment->position;
/* add duration */
if (duration != GST_CLOCK_TIME_NONE)
timestamp += duration;
GST_DEBUG_OBJECT (mq, "queue %d, %s position updated to %" GST_TIME_FORMAT,
sq->id, segment == &sq->sink_segment ? "sink" : "src",
GST_TIME_ARGS (timestamp));
segment->position = timestamp;
if (segment == &sq->sink_segment)
sq->sink_tainted = TRUE;
else
sq->src_tainted = TRUE;
/* calc diff with other end */
update_time_level (mq, sq);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
}
static void
apply_gap (GstMultiQueue * mq, GstSingleQueue * sq, GstEvent * event,
GstSegment * segment)
{
GstClockTime timestamp;
GstClockTime duration;
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
gst_event_parse_gap (event, &timestamp, &duration);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
if (GST_CLOCK_TIME_IS_VALID (duration)) {
timestamp += duration;
}
segment->position = timestamp;
if (segment == &sq->sink_segment)
sq->sink_tainted = TRUE;
else
sq->src_tainted = TRUE;
/* calc diff with other end */
update_time_level (mq, sq);
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
}
static GstClockTimeDiff
get_running_time (GstSegment * segment, GstMiniObject * object, gboolean end)
{
GstClockTimeDiff time = GST_CLOCK_STIME_NONE;
if (GST_IS_BUFFER (object)) {
GstBuffer *buf = GST_BUFFER_CAST (object);
GstClockTime btime = GST_BUFFER_DTS_OR_PTS (buf);
if (GST_CLOCK_TIME_IS_VALID (btime)) {
if (end && GST_BUFFER_DURATION_IS_VALID (buf))
btime += GST_BUFFER_DURATION (buf);
time = my_segment_to_running_time (segment, btime);
}
} else if (GST_IS_BUFFER_LIST (object)) {
GstBufferList *list = GST_BUFFER_LIST_CAST (object);
gint i, n;
GstBuffer *buf;
n = gst_buffer_list_length (list);
for (i = 0; i < n; i++) {
GstClockTime btime;
buf = gst_buffer_list_get (list, i);
btime = GST_BUFFER_DTS_OR_PTS (buf);
if (GST_CLOCK_TIME_IS_VALID (btime)) {
if (end && GST_BUFFER_DURATION_IS_VALID (buf))
btime += GST_BUFFER_DURATION (buf);
time = my_segment_to_running_time (segment, btime);
if (!end)
goto done;
} else if (!end) {
goto done;
}
}
} else if (GST_IS_EVENT (object)) {
GstEvent *event = GST_EVENT_CAST (object);
/* For newsegment events return the running time of the start position */
if (GST_EVENT_TYPE (event) == GST_EVENT_SEGMENT) {
const GstSegment *new_segment;
gst_event_parse_segment (event, &new_segment);
if (new_segment->format == GST_FORMAT_TIME) {
time =
my_segment_to_running_time ((GstSegment *) new_segment,
new_segment->start);
}
}
}
done:
return time;
}
static GstFlowReturn
gst_single_queue_push_one (GstMultiQueue * mq, GstSingleQueue * sq,
GstMiniObject * object, gboolean * allow_drop)
{
GstFlowReturn result = sq->srcresult;
GstPad *srcpad = g_weak_ref_get (&sq->srcpad);
if (!srcpad) {
GST_INFO_OBJECT (mq,
"Pushing while corresponding sourcepad has been cleared");
return GST_FLOW_FLUSHING;
}
if (GST_IS_BUFFER (object)) {
GstBuffer *buffer;
GstClockTime timestamp, duration;
buffer = GST_BUFFER_CAST (object);
timestamp = GST_BUFFER_DTS_OR_PTS (buffer);
duration = GST_BUFFER_DURATION (buffer);
apply_buffer (mq, sq, timestamp, duration, &sq->src_segment);
/* Applying the buffer may have made the queue non-full again, unblock it if needed */
gst_data_queue_limits_changed (sq->queue);
if (G_UNLIKELY (*allow_drop)) {
GST_DEBUG_OBJECT (mq,
"SingleQueue %d : Dropping EOS buffer %p with ts %" GST_TIME_FORMAT,
sq->id, buffer, GST_TIME_ARGS (timestamp));
gst_buffer_unref (buffer);
} else {
GST_DEBUG_OBJECT (mq,
"SingleQueue %d : Pushing buffer %p with ts %" GST_TIME_FORMAT,
sq->id, buffer, GST_TIME_ARGS (timestamp));
result = gst_pad_push (srcpad, buffer);
}
} else if (GST_IS_EVENT (object)) {
GstEvent *event;
event = GST_EVENT_CAST (object);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEGMENT_DONE:
*allow_drop = FALSE;
break;
case GST_EVENT_EOS:
result = GST_FLOW_EOS;
if (G_UNLIKELY (*allow_drop))
*allow_drop = FALSE;
break;
case GST_EVENT_STREAM_START:
result = GST_FLOW_OK;
if (G_UNLIKELY (*allow_drop))
*allow_drop = FALSE;
break;
case GST_EVENT_SEGMENT:
apply_segment (mq, sq, event, &sq->src_segment);
/* Applying the segment may have made the queue non-full again, unblock it if needed */
gst_data_queue_limits_changed (sq->queue);
if (G_UNLIKELY (*allow_drop)) {
result = GST_FLOW_OK;
*allow_drop = FALSE;
}
break;
case GST_EVENT_GAP:
apply_gap (mq, sq, event, &sq->src_segment);
/* Applying the gap may have made the queue non-full again, unblock it if needed */
gst_data_queue_limits_changed (sq->queue);
break;
default:
break;
}
if (G_UNLIKELY (*allow_drop)) {
GST_DEBUG_OBJECT (mq,
"SingleQueue %d : Dropping EOS event %p of type %s",
sq->id, event, GST_EVENT_TYPE_NAME (event));
gst_event_unref (event);
} else {
GST_DEBUG_OBJECT (mq,
"SingleQueue %d : Pushing event %p of type %s",
sq->id, event, GST_EVENT_TYPE_NAME (event));
gst_pad_push_event (srcpad, event);
}
} else if (GST_IS_QUERY (object)) {
GstQuery *query;
gboolean res;
query = GST_QUERY_CAST (object);
if (G_UNLIKELY (*allow_drop)) {
GST_DEBUG_OBJECT (mq,
"SingleQueue %d : Dropping EOS query %p", sq->id, query);
gst_query_unref (query);
res = FALSE;
} else {
res = gst_pad_peer_query (srcpad, query);
}
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
sq->last_query = res;
sq->last_handled_query = query;
g_cond_signal (&sq->query_handled);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
} else {
g_warning ("Unexpected object in singlequeue %u (refcounting problem?)",
sq->id);
}
gst_object_unref (srcpad);
return result;
/* ERRORS */
}
static GstMiniObject *
gst_multi_queue_item_steal_object (GstMultiQueueItem * item)
{
GstMiniObject *res;
res = item->object;
item->object = NULL;
return res;
}
static void
gst_multi_queue_item_destroy (GstMultiQueueItem * item)
{
if (!item->is_query && item->object)
gst_mini_object_unref (item->object);
g_slice_free (GstMultiQueueItem, item);
}
/* takes ownership of passed mini object! */
static GstMultiQueueItem *
gst_multi_queue_buffer_item_new (GstMiniObject * object, guint32 curid)
{
GstMultiQueueItem *item;
item = g_slice_new (GstMultiQueueItem);
item->object = object;
item->destroy = (GDestroyNotify) gst_multi_queue_item_destroy;
item->posid = curid;
item->is_query = GST_IS_QUERY (object);
item->size = gst_buffer_get_size (GST_BUFFER_CAST (object));
item->duration = GST_BUFFER_DURATION (object);
if (item->duration == GST_CLOCK_TIME_NONE)
item->duration = 0;
item->visible = TRUE;
return item;
}
static GstMultiQueueItem *
gst_multi_queue_mo_item_new (GstMiniObject * object, guint32 curid)
{
GstMultiQueueItem *item;
item = g_slice_new (GstMultiQueueItem);
item->object = object;
item->destroy = (GDestroyNotify) gst_multi_queue_item_destroy;
item->posid = curid;
item->is_query = GST_IS_QUERY (object);
item->size = 0;
item->duration = 0;
item->visible = FALSE;
return item;
}
/* Each main loop attempts to push buffers until the return value
* is not-linked. not-linked pads are not allowed to push data beyond
* any linked pads, so they don't 'rush ahead of the pack'.
*/
static void
gst_multi_queue_loop (GstPad * pad)
{
GstSingleQueue *sq;
GstMultiQueueItem *item;
GstDataQueueItem *sitem;
GstMultiQueue *mq;
GstMiniObject *object = NULL;
guint32 newid;
GstFlowReturn result;
GstClockTimeDiff next_time;
gboolean is_buffer;
gboolean do_update_buffering = FALSE;
gboolean dropping = FALSE;
GstPad *srcpad = NULL;
sq = GST_MULTIQUEUE_PAD (pad)->sq;
mq = g_weak_ref_get (&sq->mqueue);
srcpad = g_weak_ref_get (&sq->srcpad);
if (!mq || !srcpad)
goto out_flushing;
next:
GST_DEBUG_OBJECT (mq, "SingleQueue %d : trying to pop an object", sq->id);
if (sq->flushing)
goto out_flushing;
/* Get something from the queue, blocking until that happens, or we get
* flushed */
if (!(gst_data_queue_pop (sq->queue, &sitem)))
goto out_flushing;
item = (GstMultiQueueItem *) sitem;
newid = item->posid;
/* steal the object and destroy the item */
object = gst_multi_queue_item_steal_object (item);
gst_multi_queue_item_destroy (item);
is_buffer = GST_IS_BUFFER (object);
/* Get running time of the item. Events will have GST_CLOCK_STIME_NONE */
next_time = get_running_time (&sq->src_segment, object, FALSE);
GST_LOG_OBJECT (mq, "SingleQueue %d : newid:%d , oldid:%d",
sq->id, newid, sq->last_oldid);
/* If we're not-linked, we do some extra work because we might need to
* wait before pushing. If we're linked but there's a gap in the IDs,
* or it's the first loop, or we just passed the previous highid,
* we might need to wake some sleeping pad up, so there's extra work
* there too */
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (sq->srcresult == GST_FLOW_NOT_LINKED
|| (sq->last_oldid == G_MAXUINT32) || (newid != (sq->last_oldid + 1))
|| sq->last_oldid > mq->highid) {
GST_LOG_OBJECT (mq, "CHECKING sq->srcresult: %s",
gst_flow_get_name (sq->srcresult));
/* Check again if we're flushing after the lock is taken,
* the flush flag might have been changed in the meantime */
if (sq->flushing) {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
goto out_flushing;
}
/* Update the nextid so other threads know when to wake us up */
sq->nextid = newid;
/* Take into account the extra cache time since we're unlinked */
if (GST_CLOCK_STIME_IS_VALID (next_time))
next_time += mq->unlinked_cache_time;
sq->next_time = next_time;
/* Update the oldid (the last ID we output) for highid tracking */
if (sq->last_oldid != G_MAXUINT32)
sq->oldid = sq->last_oldid;
if (sq->srcresult == GST_FLOW_NOT_LINKED) {
gboolean should_wait;
/* Go to sleep until it's time to push this buffer */
/* Recompute the highid */
compute_high_id (mq);
/* Recompute the high time */
compute_high_time (mq, sq->groupid);
GST_DEBUG_OBJECT (mq,
"groupid %d high_time %" GST_STIME_FORMAT " next_time %"
GST_STIME_FORMAT, sq->groupid, GST_STIME_ARGS (sq->group_high_time),
GST_STIME_ARGS (next_time));
if (mq->sync_by_running_time) {
if (sq->group_high_time == GST_CLOCK_STIME_NONE) {
should_wait = GST_CLOCK_STIME_IS_VALID (next_time) &&
(mq->high_time == GST_CLOCK_STIME_NONE
|| next_time > mq->high_time);
} else {
should_wait = GST_CLOCK_STIME_IS_VALID (next_time) &&
next_time > sq->group_high_time;
}
} else
should_wait = newid > mq->highid;
while (should_wait && sq->srcresult == GST_FLOW_NOT_LINKED) {
GST_DEBUG_OBJECT (mq,
"queue %d sleeping for not-linked wakeup with "
"newid %u, highid %u, next_time %" GST_STIME_FORMAT
", high_time %" GST_STIME_FORMAT, sq->id, newid, mq->highid,
GST_STIME_ARGS (next_time), GST_STIME_ARGS (sq->group_high_time));
/* Wake up all non-linked pads before we sleep */
wake_up_next_non_linked (mq);
mq->numwaiting++;
g_cond_wait (&sq->turn, &mq->qlock);
mq->numwaiting--;
if (sq->flushing) {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
goto out_flushing;
}
/* Recompute the high time and ID */
compute_high_time (mq, sq->groupid);
compute_high_id (mq);
GST_DEBUG_OBJECT (mq, "queue %d woken from sleeping for not-linked "
"wakeup with newid %u, highid %u, next_time %" GST_STIME_FORMAT
", high_time %" GST_STIME_FORMAT " mq high_time %" GST_STIME_FORMAT,
sq->id, newid, mq->highid,
GST_STIME_ARGS (next_time), GST_STIME_ARGS (sq->group_high_time),
GST_STIME_ARGS (mq->high_time));
if (mq->sync_by_running_time) {
if (sq->group_high_time == GST_CLOCK_STIME_NONE) {
should_wait = GST_CLOCK_STIME_IS_VALID (next_time) &&
(mq->high_time == GST_CLOCK_STIME_NONE
|| next_time > mq->high_time);
} else {
should_wait = GST_CLOCK_STIME_IS_VALID (next_time) &&
next_time > sq->group_high_time;
}
} else
should_wait = newid > mq->highid;
}
/* Re-compute the high_id in case someone else pushed */
compute_high_id (mq);
compute_high_time (mq, sq->groupid);
} else {
compute_high_id (mq);
compute_high_time (mq, sq->groupid);
/* Wake up all non-linked pads */
wake_up_next_non_linked (mq);
}
/* We're done waiting, we can clear the nextid and nexttime */
sq->nextid = 0;
sq->next_time = GST_CLOCK_STIME_NONE;
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
if (sq->flushing)
goto out_flushing;
GST_LOG_OBJECT (mq, "sq:%d BEFORE PUSHING sq->srcresult: %s", sq->id,
gst_flow_get_name (sq->srcresult));
/* Update time stats */
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
next_time = get_running_time (&sq->src_segment, object, TRUE);
if (GST_CLOCK_STIME_IS_VALID (next_time)) {
if (sq->last_time == GST_CLOCK_STIME_NONE || sq->last_time < next_time)
sq->last_time = next_time;
if (mq->high_time == GST_CLOCK_STIME_NONE || mq->high_time <= next_time) {
/* Wake up all non-linked pads now that we advanced the high time */
mq->high_time = next_time;
wake_up_next_non_linked (mq);
}
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
/* Try to push out the new object */
result = gst_single_queue_push_one (mq, sq, object, &dropping);
object = NULL;
/* Check if we pushed something already and if this is
* now a switch from an active to a non-active stream.
*
* If it is, we reset all the waiting streams, let them
* push another buffer to see if they're now active again.
* This allows faster switching between streams and prevents
* deadlocks if downstream does any waiting too.
*/
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (sq->pushed && sq->srcresult == GST_FLOW_OK
&& result == GST_FLOW_NOT_LINKED) {
GList *tmp;
GST_LOG_OBJECT (mq, "SingleQueue %d : Changed from active to non-active",
sq->id);
compute_high_id (mq);
compute_high_time (mq, sq->groupid);
do_update_buffering = TRUE;
/* maybe no-one is waiting */
if (mq->numwaiting > 0) {
/* Else figure out which singlequeue(s) need waking up */
for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
GstSingleQueue *sq2 = (GstSingleQueue *) tmp->data;
if (sq2->srcresult == GST_FLOW_NOT_LINKED) {
GST_LOG_OBJECT (mq, "Waking up singlequeue %d", sq2->id);
sq2->pushed = FALSE;
sq2->srcresult = GST_FLOW_OK;
g_cond_signal (&sq2->turn);
}
}
}
}
if (is_buffer)
sq->pushed = TRUE;
/* now hold on a bit;
* can not simply throw this result to upstream, because
* that might already be onto another segment, so we have to make
* sure we are relaying the correct info wrt proper segment */
if (result == GST_FLOW_EOS && !dropping &&
sq->srcresult != GST_FLOW_NOT_LINKED) {
GST_DEBUG_OBJECT (mq, "starting EOS drop on sq %d", sq->id);
dropping = TRUE;
/* pretend we have not seen EOS yet for upstream's sake */
result = sq->srcresult;
} else if (dropping && gst_data_queue_is_empty (sq->queue)) {
/* queue empty, so stop dropping
* we can commit the result we have now,
* which is either OK after a segment, or EOS */
GST_DEBUG_OBJECT (mq, "committed EOS drop on sq %d", sq->id);
dropping = FALSE;
result = GST_FLOW_EOS;
}
sq->srcresult = result;
sq->last_oldid = newid;
if (do_update_buffering)
update_buffering (mq, sq);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
GST_LOG_OBJECT (mq, "sq:%d AFTER PUSHING sq->srcresult: %s (is_eos:%d)",
sq->id, gst_flow_get_name (sq->srcresult), GST_PAD_IS_EOS (srcpad));
/* Need to make sure wake up any sleeping pads when we exit */
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (mq->numwaiting > 0 && (GST_PAD_IS_EOS (srcpad)
|| sq->srcresult == GST_FLOW_EOS)) {
compute_high_time (mq, sq->groupid);
compute_high_id (mq);
wake_up_next_non_linked (mq);
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
if (dropping)
goto next;
if (result != GST_FLOW_OK && result != GST_FLOW_NOT_LINKED
&& result != GST_FLOW_EOS)
goto out_flushing;
done:
gst_clear_object (&mq);
gst_clear_object (&srcpad);
return;
out_flushing:
{
if (object && !GST_IS_QUERY (object))
gst_mini_object_unref (object);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
sq->last_query = FALSE;
g_cond_signal (&sq->query_handled);
/* Post an error message if we got EOS while downstream
* has returned an error flow return. After EOS there
* will be no further buffer which could propagate the
* error upstream */
if ((sq->is_eos || sq->is_segment_done) && sq->srcresult < GST_FLOW_EOS) {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
GST_ELEMENT_FLOW_ERROR (mq, sq->srcresult);
} else {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
}
/* upstream needs to see fatal result ASAP to shut things down,
* but might be stuck in one of our other full queues;
* so empty this one and trigger dynamic queue growth. At
* this point the srcresult is not OK, NOT_LINKED
* or EOS, i.e. a real failure */
gst_single_queue_flush_queue (sq, FALSE);
single_queue_underrun_cb (sq->queue, sq);
gst_data_queue_set_flushing (sq->queue, TRUE);
gst_pad_pause_task (srcpad);
GST_CAT_LOG_OBJECT (multi_queue_debug, mq,
"SingleQueue[%d] task paused, reason:%s",
sq->id, gst_flow_get_name (sq->srcresult));
goto done;
}
}
/**
* gst_multi_queue_chain:
*
* This is similar to GstQueue's chain function, except:
* _ we don't have leak behaviours,
* _ we push with a unique id (curid)
*/
static GstFlowReturn
gst_multi_queue_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstSingleQueue *sq;
GstMultiQueue *mq;
GstMultiQueueItem *item = NULL;
guint32 curid;
GstClockTime timestamp, duration;
sq = GST_MULTIQUEUE_PAD (pad)->sq;
mq = g_weak_ref_get (&sq->mqueue);
if (!mq)
goto flushing;
/* if eos, we are always full, so avoid hanging incoming indefinitely */
if (sq->is_eos)
goto was_eos;
sq->active = TRUE;
/* Get a unique incrementing id */
curid = g_atomic_int_add ((gint *) & mq->counter, 1);
timestamp = GST_BUFFER_DTS_OR_PTS (buffer);
duration = GST_BUFFER_DURATION (buffer);
GST_LOG_OBJECT (mq,
"SingleQueue %d : about to enqueue buffer %p with id %d (pts:%"
GST_TIME_FORMAT " dts:%" GST_TIME_FORMAT " dur:%" GST_TIME_FORMAT ")",
sq->id, buffer, curid, GST_TIME_ARGS (GST_BUFFER_PTS (buffer)),
GST_TIME_ARGS (GST_BUFFER_DTS (buffer)), GST_TIME_ARGS (duration));
item = gst_multi_queue_buffer_item_new (GST_MINI_OBJECT_CAST (buffer), curid);
/* Update interleave before pushing data into queue */
if (mq->use_interleave) {
GstClockTime val = timestamp;
GstClockTimeDiff dval;
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (val == GST_CLOCK_TIME_NONE)
val = sq->sink_segment.position;
if (duration != GST_CLOCK_TIME_NONE)
val += duration;
dval = my_segment_to_running_time (&sq->sink_segment, val);
if (GST_CLOCK_STIME_IS_VALID (dval)) {
sq->cached_sinktime = dval;
GST_DEBUG_OBJECT (mq,
"Queue %d cached sink time now %" G_GINT64_FORMAT " %"
GST_STIME_FORMAT, sq->id, sq->cached_sinktime,
GST_STIME_ARGS (sq->cached_sinktime));
calculate_interleave (mq, sq);
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
}
if (!(gst_data_queue_push (sq->queue, (GstDataQueueItem *) item)))
goto flushing;
/* update time level, we must do this after pushing the data in the queue so
* that we never end up filling the queue first. */
apply_buffer (mq, sq, timestamp, duration, &sq->sink_segment);
done:
gst_clear_object (&mq);
return sq->srcresult;
/* ERRORS */
flushing:
{
GST_LOG_OBJECT (mq, "SingleQueue %d : exit because task paused, reason: %s",
sq->id, gst_flow_get_name (sq->srcresult));
if (item)
gst_multi_queue_item_destroy (item);
goto done;
}
was_eos:
{
GST_DEBUG_OBJECT (mq, "we are EOS, dropping buffer, return EOS");
gst_buffer_unref (buffer);
gst_object_unref (mq);
return GST_FLOW_EOS;
}
}
static gboolean
gst_multi_queue_sink_activate_mode (GstPad * pad, GstObject * parent,
GstPadMode mode, gboolean active)
{
gboolean res;
GstSingleQueue *sq;
GstMultiQueue *mq;
sq = GST_MULTIQUEUE_PAD (pad)->sq;
mq = (GstMultiQueue *) gst_pad_get_parent (pad);
/* mq is NULL if the pad is activated/deactivated before being
* added to the multiqueue */
if (mq)
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
switch (mode) {
case GST_PAD_MODE_PUSH:
if (active) {
/* All pads start off linked until they push one buffer */
sq->srcresult = GST_FLOW_OK;
sq->pushed = FALSE;
gst_data_queue_set_flushing (sq->queue, FALSE);
} else {
sq->srcresult = GST_FLOW_FLUSHING;
sq->last_query = FALSE;
g_cond_signal (&sq->query_handled);
gst_data_queue_set_flushing (sq->queue, TRUE);
/* Wait until streaming thread has finished */
if (mq)
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
GST_PAD_STREAM_LOCK (pad);
if (mq)
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
gst_data_queue_flush (sq->queue);
if (mq)
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
GST_PAD_STREAM_UNLOCK (pad);
if (mq)
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
}
res = TRUE;
break;
default:
res = FALSE;
break;
}
if (mq) {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_object_unref (mq);
}
return res;
}
static GstFlowReturn
gst_multi_queue_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstSingleQueue *sq;
GstMultiQueue *mq;
guint32 curid;
GstMultiQueueItem *item;
gboolean res = TRUE;
GstFlowReturn flowret = GST_FLOW_OK;
GstEventType type;
GstEvent *sref = NULL;
GstPad *srcpad;
sq = GST_MULTIQUEUE_PAD (pad)->sq;
mq = (GstMultiQueue *) parent;
srcpad = g_weak_ref_get (&sq->srcpad);
if (!srcpad) {
GST_INFO_OBJECT (pad, "Pushing while corresponding sourcepad has been"
" removed already");
return GST_FLOW_FLUSHING;
}
type = GST_EVENT_TYPE (event);
switch (type) {
case GST_EVENT_STREAM_START:
{
if (mq->sync_by_running_time) {
GstStreamFlags stream_flags;
gst_event_parse_stream_flags (event, &stream_flags);
if ((stream_flags & GST_STREAM_FLAG_SPARSE)) {
GST_INFO_OBJECT (mq, "SingleQueue %d is a sparse stream", sq->id);
sq->is_sparse = TRUE;
}
}
sq->thread = g_thread_self ();
/* Remove EOS flag */
sq->is_eos = FALSE;
break;
}
case GST_EVENT_FLUSH_START:
GST_DEBUG_OBJECT (mq, "SingleQueue %d : received flush start event",
sq->id);
res = gst_pad_push_event (srcpad, event);
gst_single_queue_flush (mq, sq, TRUE, FALSE);
gst_single_queue_pause (mq, sq);
goto done;
case GST_EVENT_FLUSH_STOP:
GST_DEBUG_OBJECT (mq, "SingleQueue %d : received flush stop event",
sq->id);
res = gst_pad_push_event (srcpad, event);
gst_single_queue_flush (mq, sq, FALSE, FALSE);
gst_single_queue_start (mq, sq);
goto done;
case GST_EVENT_SEGMENT:
sq->is_segment_done = FALSE;
sref = gst_event_ref (event);
break;
case GST_EVENT_GAP:
/* take ref because the queue will take ownership and we need the event
* afterwards to update the segment */
sref = gst_event_ref (event);
if (mq->use_interleave) {
GstClockTime val, dur;
GstClockTime stime;
gst_event_parse_gap (event, &val, &dur);
if (GST_CLOCK_TIME_IS_VALID (val)) {
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (GST_CLOCK_TIME_IS_VALID (dur))
val += dur;
stime = my_segment_to_running_time (&sq->sink_segment, val);
if (GST_CLOCK_STIME_IS_VALID (stime)) {
sq->cached_sinktime = stime;
calculate_interleave (mq, sq);
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
}
}
break;
default:
if (!(GST_EVENT_IS_SERIALIZED (event))) {
res = gst_pad_push_event (srcpad, event);
goto done;
}
break;
}
/* if eos, we are always full, so avoid hanging incoming indefinitely */
if (sq->is_eos)
goto was_eos;
/* Get an unique incrementing id. */
curid = g_atomic_int_add ((gint *) & mq->counter, 1);
item = gst_multi_queue_mo_item_new ((GstMiniObject *) event, curid);
GST_DEBUG_OBJECT (mq,
"SingleQueue %d : Enqueuing 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))
goto flushing;
/* mark EOS when we received one, we must do that after putting the
* buffer in the queue because EOS marks the buffer as filled. */
switch (type) {
case GST_EVENT_SEGMENT_DONE:
sq->is_segment_done = TRUE;
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
update_buffering (mq, sq);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
single_queue_overrun_cb (sq->queue, sq);
gst_multi_queue_post_buffering (mq);
break;
case GST_EVENT_EOS:
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
sq->is_eos = TRUE;
/* Post an error message if we got EOS while downstream
* has returned an error flow return. After EOS there
* will be no further buffer which could propagate the
* error upstream */
if (sq->srcresult < GST_FLOW_EOS) {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
GST_ELEMENT_FLOW_ERROR (mq, sq->srcresult);
} else {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
}
/* EOS affects the buffering state */
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
update_buffering (mq, sq);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
single_queue_overrun_cb (sq->queue, sq);
gst_multi_queue_post_buffering (mq);
break;
case GST_EVENT_SEGMENT:
apply_segment (mq, sq, sref, &sq->sink_segment);
gst_event_unref (sref);
/* a new segment allows us to accept more buffers if we got EOS
* from downstream */
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (sq->srcresult == GST_FLOW_EOS)
sq->srcresult = GST_FLOW_OK;
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
break;
case GST_EVENT_GAP:
sq->active = TRUE;
apply_gap (mq, sq, sref, &sq->sink_segment);
gst_event_unref (sref);
default:
break;
}
done:
gst_object_unref (srcpad);
if (res == FALSE)
flowret = GST_FLOW_ERROR;
GST_DEBUG_OBJECT (mq, "SingleQueue %d : returning %s", sq->id,
gst_flow_get_name (flowret));
return flowret;
flushing:
{
gst_object_unref (srcpad);
GST_LOG_OBJECT (mq, "SingleQueue %d : exit because task paused, reason: %s",
sq->id, gst_flow_get_name (sq->srcresult));
if (sref)
gst_event_unref (sref);
gst_multi_queue_item_destroy (item);
return sq->srcresult;
}
was_eos:
{
gst_object_unref (srcpad);
GST_DEBUG_OBJECT (mq, "we are EOS, dropping event, return GST_FLOW_EOS");
gst_event_unref (event);
return GST_FLOW_EOS;
}
}
static gboolean
gst_multi_queue_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
gboolean res;
GstSingleQueue *sq;
GstMultiQueue *mq;
sq = GST_MULTIQUEUE_PAD (pad)->sq;
mq = (GstMultiQueue *) parent;
switch (GST_QUERY_TYPE (query)) {
default:
if (GST_QUERY_IS_SERIALIZED (query)) {
guint32 curid;
GstMultiQueueItem *item;
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (sq->srcresult != GST_FLOW_OK)
goto out_flushing;
/* serialized events go in the queue. We need to be certain that we
* don't cause deadlocks waiting for the query return value. We check if
* the queue is empty (nothing is blocking downstream and the query can
* be pushed for sure) or we are not buffering. If we are buffering,
* the pipeline waits to unblock downstream until our queue fills up
* completely, which can not happen if we block on the query..
* Therefore we only potentially block when we are not buffering. */
if (!mq->use_buffering || gst_data_queue_is_empty (sq->queue)) {
/* Get an unique incrementing id. */
curid = g_atomic_int_add ((gint *) & mq->counter, 1);
item = gst_multi_queue_mo_item_new ((GstMiniObject *) query, curid);
GST_DEBUG_OBJECT (mq,
"SingleQueue %d : Enqueuing query %p of type %s with id %d",
sq->id, query, GST_QUERY_TYPE_NAME (query), curid);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
res = gst_data_queue_push (sq->queue, (GstDataQueueItem *) item);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (!res || sq->flushing)
goto out_flushing;
/* it might be that the query has been taken out of the queue
* while we were unlocked. So, we need to check if the last
* handled query is the same one than the one we just
* pushed. If it is, we don't need to wait for the condition
* variable, otherwise we wait for the condition variable to
* be signaled. */
while (!sq->flushing && sq->srcresult == GST_FLOW_OK
&& sq->last_handled_query != query)
g_cond_wait (&sq->query_handled, &mq->qlock);
res = sq->last_query;
sq->last_handled_query = NULL;
} else {
GST_DEBUG_OBJECT (mq, "refusing query, we are buffering and the "
"queue is not empty");
res = FALSE;
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
} else {
/* default handling */
res = gst_pad_query_default (pad, parent, query);
}
break;
}
return res;
out_flushing:
{
GST_DEBUG_OBJECT (mq, "Flushing");
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
return FALSE;
}
}
static gboolean
gst_multi_queue_src_activate_mode (GstPad * pad, GstObject * parent,
GstPadMode mode, gboolean active)
{
GstMultiQueue *mq;
GstSingleQueue *sq;
gboolean result;
sq = GST_MULTIQUEUE_PAD (pad)->sq;
mq = g_weak_ref_get (&sq->mqueue);
if (!mq) {
GST_ERROR_OBJECT (pad, "No multique set anymore, can't activate pad");
return FALSE;
}
GST_DEBUG_OBJECT (mq, "SingleQueue %d", sq->id);
switch (mode) {
case GST_PAD_MODE_PUSH:
if (active) {
gst_single_queue_flush (mq, sq, FALSE, TRUE);
result = parent ? gst_single_queue_start (mq, sq) : TRUE;
} else {
gst_single_queue_flush (mq, sq, TRUE, TRUE);
result = gst_single_queue_stop (mq, sq);
}
break;
default:
result = FALSE;
break;
}
gst_object_unref (mq);
return result;
}
static gboolean
gst_multi_queue_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstSingleQueue *sq = GST_MULTIQUEUE_PAD (pad)->sq;
GstMultiQueue *mq = g_weak_ref_get (&sq->mqueue);
gboolean ret;
GstPad *sinkpad = g_weak_ref_get (&sq->sinkpad);
if (!mq || !sinkpad) {
gst_clear_object (&sinkpad);
gst_clear_object (&mq);
GST_INFO_OBJECT (pad, "No multique/sinkpad set anymore, flushing");
return FALSE;
}
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_RECONFIGURE:
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
if (sq->srcresult == GST_FLOW_NOT_LINKED) {
sq->srcresult = GST_FLOW_OK;
g_cond_signal (&sq->turn);
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
ret = gst_pad_push_event (sinkpad, event);
break;
default:
ret = gst_pad_push_event (sinkpad, event);
break;
}
gst_object_unref (sinkpad);
gst_object_unref (mq);
return ret;
}
static gboolean
gst_multi_queue_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
gboolean res;
/* FIXME, Handle position offset depending on queue size */
switch (GST_QUERY_TYPE (query)) {
default:
/* default handling */
res = gst_pad_query_default (pad, parent, query);
break;
}
return res;
}
/*
* Next-non-linked functions
*/
/* WITH LOCK TAKEN */
static void
wake_up_next_non_linked (GstMultiQueue * mq)
{
GList *tmp;
/* maybe no-one is waiting */
if (mq->numwaiting < 1)
return;
if (mq->sync_by_running_time && GST_CLOCK_STIME_IS_VALID (mq->high_time)) {
/* Else figure out which singlequeue(s) need waking up */
for (tmp = mq->queues; tmp; tmp = tmp->next) {
GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
if (sq->srcresult == GST_FLOW_NOT_LINKED) {
GstClockTimeDiff high_time;
if (GST_CLOCK_STIME_IS_VALID (sq->group_high_time))
high_time = sq->group_high_time;
else
high_time = mq->high_time;
if (GST_CLOCK_STIME_IS_VALID (sq->next_time) &&
GST_CLOCK_STIME_IS_VALID (high_time)
&& sq->next_time <= high_time) {
GST_LOG_OBJECT (mq, "Waking up singlequeue %d", sq->id);
g_cond_signal (&sq->turn);
}
}
}
} else {
/* Else figure out which singlequeue(s) need waking up */
for (tmp = mq->queues; tmp; tmp = tmp->next) {
GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
if (sq->srcresult == GST_FLOW_NOT_LINKED &&
sq->nextid != 0 && sq->nextid <= mq->highid) {
GST_LOG_OBJECT (mq, "Waking up singlequeue %d", sq->id);
g_cond_signal (&sq->turn);
}
}
}
}
/* WITH LOCK TAKEN */
static void
compute_high_id (GstMultiQueue * mq)
{
/* The high-id is either the highest id among the linked pads, or if all
* pads are not-linked, it's the lowest not-linked pad */
GList *tmp;
guint32 lowest = G_MAXUINT32;
guint32 highid = G_MAXUINT32;
for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
GstPad *srcpad = g_weak_ref_get (&sq->srcpad);
if (!srcpad) {
GST_INFO_OBJECT (mq,
"srcpad has been removed already... ignoring single queue");
continue;
}
GST_LOG_OBJECT (mq, "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) {
/* No need to consider queues which are not waiting */
if (sq->nextid == 0) {
GST_LOG_OBJECT (mq, "sq:%d is not waiting - ignoring", sq->id);
gst_object_unref (srcpad);
continue;
}
if (sq->nextid < lowest)
lowest = sq->nextid;
} else if (!GST_PAD_IS_EOS (srcpad) && sq->srcresult != GST_FLOW_EOS) {
/* 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,
* unless the singlequeue output is at EOS */
if ((highid == G_MAXUINT32) || (sq->oldid > highid))
highid = sq->oldid;
}
gst_object_unref (srcpad);
}
if (highid == G_MAXUINT32 || lowest < highid)
mq->highid = lowest;
else
mq->highid = highid;
GST_LOG_OBJECT (mq, "Highid is now : %u, lowest non-linked %u", mq->highid,
lowest);
}
/* WITH LOCK TAKEN */
static void
compute_high_time (GstMultiQueue * mq, guint groupid)
{
/* The high-time is either the highest last time among the linked
* pads, or if all pads are not-linked, it's the lowest nex time of
* not-linked pad */
GList *tmp;
GstClockTimeDiff highest = GST_CLOCK_STIME_NONE;
GstClockTimeDiff lowest = GST_CLOCK_STIME_NONE;
GstClockTimeDiff group_high = GST_CLOCK_STIME_NONE;
GstClockTimeDiff group_low = GST_CLOCK_STIME_NONE;
GstClockTimeDiff res;
/* Number of streams which belong to groupid */
guint group_count = 0;
if (!mq->sync_by_running_time)
/* return GST_CLOCK_STIME_NONE; */
return;
for (tmp = mq->queues; tmp; tmp = tmp->next) {
GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
GstPad *srcpad = g_weak_ref_get (&sq->srcpad);
if (!srcpad) {
GST_INFO_OBJECT (mq,
"srcpad has been removed already... ignoring single queue");
continue;
}
GST_LOG_OBJECT (mq,
"inspecting sq:%d (group:%d) , next_time:%" GST_STIME_FORMAT
", last_time:%" GST_STIME_FORMAT ", srcresult:%s", sq->id, sq->groupid,
GST_STIME_ARGS (sq->next_time), GST_STIME_ARGS (sq->last_time),
gst_flow_get_name (sq->srcresult));
if (sq->groupid == groupid)
group_count++;
if (sq->srcresult == GST_FLOW_NOT_LINKED) {
/* No need to consider queues which are not waiting */
if (!GST_CLOCK_STIME_IS_VALID (sq->next_time)) {
GST_LOG_OBJECT (mq, "sq:%d is not waiting - ignoring", sq->id);
gst_object_unref (srcpad);
continue;
}
if (lowest == GST_CLOCK_STIME_NONE || sq->next_time < lowest)
lowest = sq->next_time;
if (sq->groupid == groupid && (group_low == GST_CLOCK_STIME_NONE
|| sq->next_time < group_low))
group_low = sq->next_time;
} else if (!GST_PAD_IS_EOS (srcpad) && sq->srcresult != GST_FLOW_EOS) {
/* If we don't have a global high time, or the global high time
* is lower than this single queue's last outputted time, store
* the queue's one, unless the singlequeue output is at EOS. */
if (highest == GST_CLOCK_STIME_NONE
|| (sq->last_time != GST_CLOCK_STIME_NONE && sq->last_time > highest))
highest = sq->last_time;
if (sq->groupid == groupid && (group_high == GST_CLOCK_STIME_NONE
|| (sq->last_time != GST_CLOCK_STIME_NONE
&& sq->last_time > group_high)))
group_high = sq->last_time;
}
GST_LOG_OBJECT (mq,
"highest now %" GST_STIME_FORMAT " lowest %" GST_STIME_FORMAT,
GST_STIME_ARGS (highest), GST_STIME_ARGS (lowest));
if (sq->groupid == groupid)
GST_LOG_OBJECT (mq,
"grouphigh %" GST_STIME_FORMAT " grouplow %" GST_STIME_FORMAT,
GST_STIME_ARGS (group_high), GST_STIME_ARGS (group_low));
gst_object_unref (srcpad);
}
if (highest == GST_CLOCK_STIME_NONE)
mq->high_time = lowest;
else
mq->high_time = highest;
/* If there's only one stream of a given type, use the global high */
if (group_count < 2)
res = GST_CLOCK_STIME_NONE;
else if (group_high == GST_CLOCK_STIME_NONE)
res = group_low;
else
res = group_high;
GST_LOG_OBJECT (mq, "group count %d for groupid %u", group_count, groupid);
GST_LOG_OBJECT (mq,
"MQ High time is now : %" GST_STIME_FORMAT ", group %d high time %"
GST_STIME_FORMAT ", lowest non-linked %" GST_STIME_FORMAT,
GST_STIME_ARGS (mq->high_time), groupid, GST_STIME_ARGS (mq->high_time),
GST_STIME_ARGS (lowest));
for (tmp = mq->queues; tmp; tmp = tmp->next) {
GstSingleQueue *sq = (GstSingleQueue *) tmp->data;
if (groupid == sq->groupid)
sq->group_high_time = res;
}
}
#define IS_FILLED(q, format, value) (((q)->max_size.format) != 0 && \
((q)->max_size.format) <= (value))
/*
* GstSingleQueue functions
*/
static void
single_queue_overrun_cb (GstDataQueue * dq, GstSingleQueue * sq)
{
GList *tmp;
GstDataQueueSize size;
gboolean filled = TRUE;
gboolean empty_found = FALSE;
GstMultiQueue *mq = g_weak_ref_get (&sq->mqueue);
if (!mq) {
GST_ERROR ("No multique set anymore, not doing anything");
return;
}
gst_data_queue_get_level (sq->queue, &size);
GST_LOG_OBJECT (mq,
"Single Queue %d: EOS %d, visible %u/%u, bytes %u/%u, time %"
G_GUINT64_FORMAT "/%" G_GUINT64_FORMAT, sq->id, sq->is_eos, size.visible,
sq->max_size.visible, size.bytes, sq->max_size.bytes, sq->cur_time,
sq->max_size.time);
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
/* check if we reached the hard time/bytes limits;
time limit is only taken into account for non-sparse streams */
if (sq->is_eos || IS_FILLED (sq, bytes, size.bytes) ||
(!sq->is_sparse && IS_FILLED (sq, time, sq->cur_time))) {
goto done;
}
/* Search for empty queues */
for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
GstSingleQueue *oq = (GstSingleQueue *) tmp->data;
if (oq == sq)
continue;
if (oq->srcresult == GST_FLOW_NOT_LINKED) {
GST_LOG_OBJECT (mq, "Queue %d is not-linked", oq->id);
continue;
}
GST_LOG_OBJECT (mq, "Checking Queue %d", oq->id);
if (gst_data_queue_is_empty (oq->queue) && !oq->is_sparse) {
GST_LOG_OBJECT (mq, "Queue %d is empty", oq->id);
empty_found = TRUE;
break;
}
}
/* if hard limits are not reached then we allow one more buffer in the full
* queue, but only if any of the other singelqueues are empty */
if (empty_found) {
if (IS_FILLED (sq, visible, size.visible)) {
sq->max_size.visible = size.visible + 1;
GST_DEBUG_OBJECT (mq,
"Bumping single queue %d max visible to %d",
sq->id, sq->max_size.visible);
filled = FALSE;
}
}
done:
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_object_unref (mq);
/* Overrun is always forwarded, since this is blocking the upstream element */
if (filled) {
GST_DEBUG_OBJECT (mq, "Queue %d is filled, signalling overrun", sq->id);
g_signal_emit (mq, gst_multi_queue_signals[SIGNAL_OVERRUN], 0);
}
}
static void
single_queue_underrun_cb (GstDataQueue * dq, GstSingleQueue * sq)
{
gboolean empty = TRUE;
GstMultiQueue *mq = g_weak_ref_get (&sq->mqueue);
GList *tmp;
if (!mq) {
GST_ERROR ("No multique set anymore, not doing anything");
return;
}
if (sq->srcresult == GST_FLOW_NOT_LINKED) {
GST_LOG_OBJECT (mq, "Single Queue %d is empty but not-linked", sq->id);
gst_object_unref (mq);
return;
} else {
GST_LOG_OBJECT (mq,
"Single Queue %d is empty, Checking other single queues", sq->id);
}
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
for (tmp = mq->queues; tmp; tmp = g_list_next (tmp)) {
GstSingleQueue *oq = (GstSingleQueue *) tmp->data;
if (gst_data_queue_is_full (oq->queue)) {
GstDataQueueSize size;
gst_data_queue_get_level (oq->queue, &size);
if (IS_FILLED (oq, visible, size.visible)) {
oq->max_size.visible = size.visible + 1;
GST_DEBUG_OBJECT (mq,
"queue %d is filled, bumping its max visible to %d", oq->id,
oq->max_size.visible);
gst_data_queue_limits_changed (oq->queue);
}
}
if (!gst_data_queue_is_empty (oq->queue) || oq->is_sparse)
empty = FALSE;
}
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_object_unref (mq);
if (empty) {
GST_DEBUG_OBJECT (mq, "All queues are empty, signalling it");
g_signal_emit (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;
GstMultiQueue *mq = g_weak_ref_get (&sq->mqueue);
if (!mq) {
GST_ERROR ("No multique set anymore, let's say we are full");
return TRUE;
}
GST_DEBUG_OBJECT (mq,
"queue %d: visible %u/%u, bytes %u/%u, time %" G_GUINT64_FORMAT "/%"
G_GUINT64_FORMAT, sq->id, visible, sq->max_size.visible, bytes,
sq->max_size.bytes, sq->cur_time, sq->max_size.time);
/* we are always filled on EOS */
if (sq->is_eos || sq->is_segment_done) {
res = TRUE;
goto done;
}
/* we never go past the max visible items unless we are in buffering mode */
if (!mq->use_buffering && IS_FILLED (sq, visible, visible)) {
res = TRUE;
goto done;
}
/* check time or bytes */
res = IS_FILLED (sq, bytes, bytes);
/* We only care about limits in time if we're not a sparse stream or
* we're not syncing by running time */
if (!sq->is_sparse || !mq->sync_by_running_time) {
/* If unlinked, take into account the extra unlinked cache time */
if (mq->sync_by_running_time && sq->srcresult == GST_FLOW_NOT_LINKED) {
if (sq->cur_time > mq->unlinked_cache_time)
res |= IS_FILLED (sq, time, sq->cur_time - mq->unlinked_cache_time);
else
res = FALSE;
} else
res |= IS_FILLED (sq, time, sq->cur_time);
}
done:
gst_object_unref (mq);
return res;
}
static void
gst_single_queue_flush_queue (GstSingleQueue * sq, gboolean full)
{
GstDataQueueItem *sitem;
GstMultiQueueItem *mitem;
gboolean was_flushing = FALSE;
GstPad *srcpad = g_weak_ref_get (&sq->srcpad);
GstMultiQueue *mq = g_weak_ref_get (&sq->mqueue);
while (!gst_data_queue_is_empty (sq->queue)) {
GstMiniObject *data;
/* FIXME: If this fails here although the queue is not empty,
* we're flushing... but we want to rescue all sticky
* events nonetheless.
*/
if (!gst_data_queue_pop (sq->queue, &sitem)) {
was_flushing = TRUE;
gst_data_queue_set_flushing (sq->queue, FALSE);
continue;
}
mitem = (GstMultiQueueItem *) sitem;
data = sitem->object;
if (!full && !mitem->is_query && GST_IS_EVENT (data)
&& srcpad && GST_EVENT_IS_STICKY (data)
&& GST_EVENT_TYPE (data) != GST_EVENT_SEGMENT
&& GST_EVENT_TYPE (data) != GST_EVENT_EOS) {
gst_pad_store_sticky_event (srcpad, GST_EVENT_CAST (data));
}
sitem->destroy (sitem);
}
gst_clear_object (&srcpad);
gst_data_queue_flush (sq->queue);
if (was_flushing)
gst_data_queue_set_flushing (sq->queue, TRUE);
if (mq) {
GST_MULTI_QUEUE_MUTEX_LOCK (mq);
update_buffering (mq, sq);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mq);
gst_multi_queue_post_buffering (mq);
gst_object_unref (mq);
}
}
static void
gst_single_queue_unref (GstSingleQueue * sq)
{
if (g_atomic_int_dec_and_test (&sq->refcount)) {
/* DRAIN QUEUE */
gst_data_queue_flush (sq->queue);
g_object_unref (sq->queue);
g_cond_clear (&sq->turn);
g_cond_clear (&sq->query_handled);
g_weak_ref_clear (&sq->sinkpad);
g_weak_ref_clear (&sq->srcpad);
g_weak_ref_clear (&sq->mqueue);
g_free (sq);
}
}
static GstSingleQueue *
gst_single_queue_ref (GstSingleQueue * squeue)
{
g_atomic_int_inc (&squeue->refcount);
return squeue;
}
static GstSingleQueue *
gst_single_queue_new (GstMultiQueue * mqueue, guint id)
{
GstPad *srcpad, *sinkpad;
GstSingleQueue *sq;
GstPadTemplate *templ;
gchar *name;
GList *tmp;
guint temp_id = (id == -1) ? 0 : id;
GST_MULTI_QUEUE_MUTEX_LOCK (mqueue);
/* Find an unused queue ID, if possible the passed one */
for (tmp = mqueue->queues; tmp; tmp = g_list_next (tmp)) {
GstSingleQueue *sq2 = (GstSingleQueue *) tmp->data;
/* This works because the IDs are sorted in ascending order */
if (sq2->id == temp_id) {
/* If this ID was requested by the caller return NULL,
* otherwise just get us the next one */
if (id == -1) {
temp_id = sq2->id + 1;
} else {
GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
return NULL;
}
} else if (sq2->id > temp_id) {
break;
}
}
sq = g_new0 (GstSingleQueue, 1);
sq->refcount = 1;
mqueue->nbqueues++;
sq->id = temp_id;
sq->groupid = DEFAULT_PAD_GROUP_ID;
sq->group_high_time = GST_CLOCK_STIME_NONE;
mqueue->queues = g_list_insert_before (mqueue->queues, tmp, sq);
mqueue->queues_cookie++;
/* 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. */
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_DEBUG_OBJECT (mqueue, "Creating GstSingleQueue id:%d", sq->id);
g_weak_ref_init (&sq->mqueue, mqueue);
sq->srcresult = GST_FLOW_FLUSHING;
sq->pushed = FALSE;
sq->queue = gst_data_queue_new ((GstDataQueueCheckFullFunction)
single_queue_check_full,
(GstDataQueueFullCallback) single_queue_overrun_cb,
(GstDataQueueEmptyCallback) single_queue_underrun_cb, sq);
sq->is_eos = FALSE;
sq->is_sparse = FALSE;
sq->flushing = FALSE;
sq->active = FALSE;
gst_segment_init (&sq->sink_segment, GST_FORMAT_TIME);
gst_segment_init (&sq->src_segment, GST_FORMAT_TIME);
sq->nextid = 0;
sq->oldid = 0;
sq->next_time = GST_CLOCK_STIME_NONE;
sq->last_time = GST_CLOCK_STIME_NONE;
g_cond_init (&sq->turn);
g_cond_init (&sq->query_handled);
sq->sinktime = GST_CLOCK_STIME_NONE;
sq->srctime = GST_CLOCK_STIME_NONE;
sq->sink_tainted = TRUE;
sq->src_tainted = TRUE;
name = g_strdup_printf ("sink_%u", sq->id);
templ = gst_static_pad_template_get (&sinktemplate);
sinkpad = g_object_new (GST_TYPE_MULTIQUEUE_PAD, "name", name,
"direction", templ->direction, "template", templ, NULL);
g_weak_ref_init (&sq->sinkpad, sinkpad);
gst_object_unref (templ);
g_free (name);
GST_MULTIQUEUE_PAD (sinkpad)->sq = sq;
gst_pad_set_chain_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_chain));
gst_pad_set_activatemode_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_sink_activate_mode));
gst_pad_set_event_full_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_sink_event));
gst_pad_set_query_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_sink_query));
gst_pad_set_iterate_internal_links_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_iterate_internal_links));
GST_OBJECT_FLAG_SET (sinkpad, GST_PAD_FLAG_PROXY_CAPS);
name = g_strdup_printf ("src_%u", sq->id);
templ = gst_static_pad_template_get (&srctemplate);
srcpad = g_object_new (GST_TYPE_MULTIQUEUE_PAD, "name", name,
"direction", templ->direction, "template", templ, NULL);
g_weak_ref_init (&sq->srcpad, srcpad);
gst_object_unref (templ);
g_free (name);
GST_MULTIQUEUE_PAD (srcpad)->sq = gst_single_queue_ref (sq);
gst_pad_set_activatemode_function (srcpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_src_activate_mode));
gst_pad_set_event_function (srcpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_src_event));
gst_pad_set_query_function (srcpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_src_query));
gst_pad_set_iterate_internal_links_function (srcpad,
GST_DEBUG_FUNCPTR (gst_multi_queue_iterate_internal_links));
GST_OBJECT_FLAG_SET (srcpad, GST_PAD_FLAG_PROXY_CAPS);
GST_MULTI_QUEUE_MUTEX_UNLOCK (mqueue);
/* only activate the pads when we are not in the NULL state
* and add the pad under the state_lock to prevent state changes
* between activating and adding */
g_rec_mutex_lock (GST_STATE_GET_LOCK (mqueue));
if (GST_STATE_TARGET (mqueue) != GST_STATE_NULL) {
gst_pad_set_active (srcpad, TRUE);
gst_pad_set_active (sinkpad, TRUE);
}
gst_element_add_pad (GST_ELEMENT (mqueue), srcpad);
gst_element_add_pad (GST_ELEMENT (mqueue), sinkpad);
if (GST_STATE_TARGET (mqueue) != GST_STATE_NULL) {
gst_single_queue_start (mqueue, sq);
}
g_rec_mutex_unlock (GST_STATE_GET_LOCK (mqueue));
GST_DEBUG_OBJECT (mqueue, "GstSingleQueue [%d] created and pads added",
sq->id);
return sq;
}
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