mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-24 17:20:36 +00:00
76e8b2ecda
Add a GDestroyNotify to the user_data we pass to gst_task_new() Change gst_pad_start_task() to also take the notify
1459 lines
48 KiB
C
1459 lines
48 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
* 2003 Colin Walters <cwalters@gnome.org>
|
|
* 2005 Wim Taymans <wim@fluendo.com>
|
|
*
|
|
* gstqueue.c:
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:element-queue
|
|
*
|
|
* Data is queued until one of the limits specified by the
|
|
* #GstQueue:max-size-buffers, #GstQueue:max-size-bytes and/or
|
|
* #GstQueue: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.
|
|
*
|
|
* The queue will create a new thread on the source pad to decouple the
|
|
* processing on sink and source pad.
|
|
*
|
|
* You can query how many buffers are queued by reading the
|
|
* #GstQueue:current-level-buffers property. You can track changes
|
|
* by connecting to the notify::current-level-buffers signal (which
|
|
* like all signals will be emitted from the streaming thread). The same
|
|
* applies to the #GstQueue:current-level-time and
|
|
* #GstQueue:current-level-bytes properties.
|
|
*
|
|
* The default queue size limits are 200 buffers, 10MB of data, or
|
|
* one second worth of data, whichever is reached first.
|
|
*
|
|
* As said earlier, the queue blocks by default when one of the specified
|
|
* maximums (bytes, time, buffers) has been reached. You can set the
|
|
* #GstQueue:leaky property to specify that instead of blocking it should
|
|
* leak (drop) new or old buffers.
|
|
*
|
|
* The #GstQueue::underrun signal is emitted when the queue has less data than
|
|
* the specified minimum thresholds require (by default: when the queue is
|
|
* empty). The #GstQueue::overrun signal is emitted when the queue is filled
|
|
* up. Both signals are emitted from the context of the streaming thread.
|
|
*/
|
|
|
|
#include "gst/gst_private.h"
|
|
|
|
#include <gst/gst.h>
|
|
#include "gstqueue.h"
|
|
|
|
#include "../../gst/gst-i18n-lib.h"
|
|
#include "../../gst/glib-compat-private.h"
|
|
|
|
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS_ANY);
|
|
|
|
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS_ANY);
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (queue_debug);
|
|
#define GST_CAT_DEFAULT (queue_debug)
|
|
GST_DEBUG_CATEGORY_STATIC (queue_dataflow);
|
|
|
|
#define STATUS(queue, pad, msg) \
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, \
|
|
"(%s:%s) " msg ": %u of %u-%u buffers, %u of %u-%u " \
|
|
"bytes, %" G_GUINT64_FORMAT " of %" G_GUINT64_FORMAT \
|
|
"-%" G_GUINT64_FORMAT " ns, %u items", \
|
|
GST_DEBUG_PAD_NAME (pad), \
|
|
queue->cur_level.buffers, \
|
|
queue->min_threshold.buffers, \
|
|
queue->max_size.buffers, \
|
|
queue->cur_level.bytes, \
|
|
queue->min_threshold.bytes, \
|
|
queue->max_size.bytes, \
|
|
queue->cur_level.time, \
|
|
queue->min_threshold.time, \
|
|
queue->max_size.time, \
|
|
queue->queue.length)
|
|
|
|
/* Queue signals and args */
|
|
enum
|
|
{
|
|
SIGNAL_UNDERRUN,
|
|
SIGNAL_RUNNING,
|
|
SIGNAL_OVERRUN,
|
|
SIGNAL_PUSHING,
|
|
LAST_SIGNAL
|
|
};
|
|
|
|
enum
|
|
{
|
|
PROP_0,
|
|
/* FIXME: don't we have another way of doing this
|
|
* "Gstreamer format" (frame/byte/time) queries? */
|
|
PROP_CUR_LEVEL_BUFFERS,
|
|
PROP_CUR_LEVEL_BYTES,
|
|
PROP_CUR_LEVEL_TIME,
|
|
PROP_MAX_SIZE_BUFFERS,
|
|
PROP_MAX_SIZE_BYTES,
|
|
PROP_MAX_SIZE_TIME,
|
|
PROP_MIN_THRESHOLD_BUFFERS,
|
|
PROP_MIN_THRESHOLD_BYTES,
|
|
PROP_MIN_THRESHOLD_TIME,
|
|
PROP_LEAKY,
|
|
PROP_SILENT
|
|
};
|
|
|
|
/* default property values */
|
|
#define DEFAULT_MAX_SIZE_BUFFERS 200 /* 200 buffers */
|
|
#define DEFAULT_MAX_SIZE_BYTES (10 * 1024 * 1024) /* 10 MB */
|
|
#define DEFAULT_MAX_SIZE_TIME GST_SECOND /* 1 second */
|
|
|
|
#define GST_QUEUE_MUTEX_LOCK(q) G_STMT_START { \
|
|
g_mutex_lock (&q->qlock); \
|
|
} G_STMT_END
|
|
|
|
#define GST_QUEUE_MUTEX_LOCK_CHECK(q,label) G_STMT_START { \
|
|
GST_QUEUE_MUTEX_LOCK (q); \
|
|
if (q->srcresult != GST_FLOW_OK) \
|
|
goto label; \
|
|
} G_STMT_END
|
|
|
|
#define GST_QUEUE_MUTEX_UNLOCK(q) G_STMT_START { \
|
|
g_mutex_unlock (&q->qlock); \
|
|
} G_STMT_END
|
|
|
|
#define GST_QUEUE_WAIT_DEL_CHECK(q, label) G_STMT_START { \
|
|
STATUS (q, q->sinkpad, "wait for DEL"); \
|
|
q->waiting_del = TRUE; \
|
|
g_cond_wait (&q->item_del, &q->qlock); \
|
|
q->waiting_del = FALSE; \
|
|
if (q->srcresult != GST_FLOW_OK) { \
|
|
STATUS (q, q->srcpad, "received DEL wakeup"); \
|
|
goto label; \
|
|
} \
|
|
STATUS (q, q->sinkpad, "received DEL"); \
|
|
} G_STMT_END
|
|
|
|
#define GST_QUEUE_WAIT_ADD_CHECK(q, label) G_STMT_START { \
|
|
STATUS (q, q->srcpad, "wait for ADD"); \
|
|
q->waiting_add = TRUE; \
|
|
g_cond_wait (&q->item_add, &q->qlock); \
|
|
q->waiting_add = FALSE; \
|
|
if (q->srcresult != GST_FLOW_OK) { \
|
|
STATUS (q, q->srcpad, "received ADD wakeup"); \
|
|
goto label; \
|
|
} \
|
|
STATUS (q, q->srcpad, "received ADD"); \
|
|
} G_STMT_END
|
|
|
|
#define GST_QUEUE_SIGNAL_DEL(q) G_STMT_START { \
|
|
if (q->waiting_del) { \
|
|
STATUS (q, q->srcpad, "signal DEL"); \
|
|
g_cond_signal (&q->item_del); \
|
|
} \
|
|
} G_STMT_END
|
|
|
|
#define GST_QUEUE_SIGNAL_ADD(q) G_STMT_START { \
|
|
if (q->waiting_add) { \
|
|
STATUS (q, q->sinkpad, "signal ADD"); \
|
|
g_cond_signal (&q->item_add); \
|
|
} \
|
|
} G_STMT_END
|
|
|
|
#define _do_init \
|
|
GST_DEBUG_CATEGORY_INIT (queue_debug, "queue", 0, "queue element"); \
|
|
GST_DEBUG_CATEGORY_INIT (queue_dataflow, "queue_dataflow", 0, \
|
|
"dataflow inside the queue element");
|
|
#define gst_queue_parent_class parent_class
|
|
G_DEFINE_TYPE_WITH_CODE (GstQueue, gst_queue, GST_TYPE_ELEMENT, _do_init);
|
|
|
|
static void gst_queue_finalize (GObject * object);
|
|
|
|
static void gst_queue_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec);
|
|
static void gst_queue_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec);
|
|
|
|
static GstFlowReturn gst_queue_chain (GstPad * pad, GstObject * parent,
|
|
GstBuffer * buffer);
|
|
static GstFlowReturn gst_queue_push_one (GstQueue * queue);
|
|
static void gst_queue_loop (GstPad * pad);
|
|
|
|
static gboolean gst_queue_handle_sink_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event);
|
|
static gboolean gst_queue_handle_sink_query (GstPad * pad, GstObject * parent,
|
|
GstQuery * query);
|
|
|
|
static gboolean gst_queue_handle_src_event (GstPad * pad, GstObject * parent,
|
|
GstEvent * event);
|
|
static gboolean gst_queue_handle_src_query (GstPad * pad, GstObject * parent,
|
|
GstQuery * query);
|
|
|
|
static void gst_queue_locked_flush (GstQueue * queue);
|
|
|
|
static gboolean gst_queue_src_activate_mode (GstPad * pad, GstObject * parent,
|
|
GstPadMode mode, gboolean active);
|
|
static gboolean gst_queue_sink_activate_mode (GstPad * pad, GstObject * parent,
|
|
GstPadMode mode, gboolean active);
|
|
|
|
static gboolean gst_queue_is_empty (GstQueue * queue);
|
|
static gboolean gst_queue_is_filled (GstQueue * queue);
|
|
|
|
#define GST_TYPE_QUEUE_LEAKY (queue_leaky_get_type ())
|
|
|
|
static GType
|
|
queue_leaky_get_type (void)
|
|
{
|
|
static GType queue_leaky_type = 0;
|
|
static const GEnumValue queue_leaky[] = {
|
|
{GST_QUEUE_NO_LEAK, "Not Leaky", "no"},
|
|
{GST_QUEUE_LEAK_UPSTREAM, "Leaky on upstream (new buffers)", "upstream"},
|
|
{GST_QUEUE_LEAK_DOWNSTREAM, "Leaky on downstream (old buffers)",
|
|
"downstream"},
|
|
{0, NULL, NULL},
|
|
};
|
|
|
|
if (!queue_leaky_type) {
|
|
queue_leaky_type = g_enum_register_static ("GstQueueLeaky", queue_leaky);
|
|
}
|
|
return queue_leaky_type;
|
|
}
|
|
|
|
static guint gst_queue_signals[LAST_SIGNAL] = { 0 };
|
|
|
|
static void
|
|
gst_queue_class_init (GstQueueClass * klass)
|
|
{
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gobject_class->set_property = gst_queue_set_property;
|
|
gobject_class->get_property = gst_queue_get_property;
|
|
|
|
/* signals */
|
|
/**
|
|
* GstQueue::underrun:
|
|
* @queue: the queue instance
|
|
*
|
|
* Reports that the buffer became empty (underrun).
|
|
* A buffer is empty if the total amount of data inside it (num-buffers, time,
|
|
* size) is lower than the boundary values which can be set through the
|
|
* GObject properties.
|
|
*/
|
|
gst_queue_signals[SIGNAL_UNDERRUN] =
|
|
g_signal_new ("underrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
|
|
G_STRUCT_OFFSET (GstQueueClass, underrun), NULL, NULL,
|
|
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
|
|
/**
|
|
* GstQueue::running:
|
|
* @queue: the queue instance
|
|
*
|
|
* Reports that enough (min-threshold) data is in the queue. Use this signal
|
|
* together with the underrun signal to pause the pipeline on underrun and
|
|
* wait for the queue to fill-up before resume playback.
|
|
*/
|
|
gst_queue_signals[SIGNAL_RUNNING] =
|
|
g_signal_new ("running", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
|
|
G_STRUCT_OFFSET (GstQueueClass, running), NULL, NULL,
|
|
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
|
|
/**
|
|
* GstQueue::overrun:
|
|
* @queue: the queue instance
|
|
*
|
|
* Reports that the buffer became full (overrun).
|
|
* A buffer 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.
|
|
*/
|
|
gst_queue_signals[SIGNAL_OVERRUN] =
|
|
g_signal_new ("overrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
|
|
G_STRUCT_OFFSET (GstQueueClass, overrun), NULL, NULL,
|
|
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
|
|
/**
|
|
* GstQueue::pushing:
|
|
* @queue: the queue instance
|
|
*
|
|
* Reports when the queue has enough data to start pushing data again on the
|
|
* source pad.
|
|
*/
|
|
gst_queue_signals[SIGNAL_PUSHING] =
|
|
g_signal_new ("pushing", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
|
|
G_STRUCT_OFFSET (GstQueueClass, pushing), NULL, NULL,
|
|
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
|
|
|
|
/* properties */
|
|
g_object_class_install_property (gobject_class, PROP_CUR_LEVEL_BYTES,
|
|
g_param_spec_uint ("current-level-bytes", "Current level (kB)",
|
|
"Current amount of data in the queue (bytes)",
|
|
0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_CUR_LEVEL_BUFFERS,
|
|
g_param_spec_uint ("current-level-buffers", "Current level (buffers)",
|
|
"Current number of buffers in the queue",
|
|
0, G_MAXUINT, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_CUR_LEVEL_TIME,
|
|
g_param_spec_uint64 ("current-level-time", "Current level (ns)",
|
|
"Current amount of data in the queue (in ns)",
|
|
0, G_MAXUINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
|
|
|
|
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 | 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 | 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 | G_PARAM_STATIC_STRINGS));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_MIN_THRESHOLD_BYTES,
|
|
g_param_spec_uint ("min-threshold-bytes", "Min. threshold (kB)",
|
|
"Min. amount of data in the queue to allow reading (bytes, 0=disable)",
|
|
0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_MIN_THRESHOLD_BUFFERS,
|
|
g_param_spec_uint ("min-threshold-buffers", "Min. threshold (buffers)",
|
|
"Min. number of buffers in the queue to allow reading (0=disable)",
|
|
0, G_MAXUINT, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
g_object_class_install_property (gobject_class, PROP_MIN_THRESHOLD_TIME,
|
|
g_param_spec_uint64 ("min-threshold-time", "Min. threshold (ns)",
|
|
"Min. amount of data in the queue to allow reading (in ns, 0=disable)",
|
|
0, G_MAXUINT64, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
g_object_class_install_property (gobject_class, PROP_LEAKY,
|
|
g_param_spec_enum ("leaky", "Leaky",
|
|
"Where the queue leaks, if at all",
|
|
GST_TYPE_QUEUE_LEAKY, GST_QUEUE_NO_LEAK,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
/**
|
|
* GstQueue:silent
|
|
*
|
|
* Don't emit queue signals. Makes queues more lightweight if no signals are
|
|
* needed.
|
|
*
|
|
* Since: 0.10.31
|
|
*/
|
|
g_object_class_install_property (gobject_class, PROP_SILENT,
|
|
g_param_spec_boolean ("silent", "Silent",
|
|
"Don't emit queue signals", FALSE,
|
|
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
|
|
|
|
gobject_class->finalize = gst_queue_finalize;
|
|
|
|
gst_element_class_set_static_metadata (gstelement_class,
|
|
"Queue",
|
|
"Generic", "Simple data queue", "Erik Walthinsen <omega@cse.ogi.edu>");
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&srctemplate));
|
|
gst_element_class_add_pad_template (gstelement_class,
|
|
gst_static_pad_template_get (&sinktemplate));
|
|
|
|
/* Registering debug symbols for function pointers */
|
|
GST_DEBUG_REGISTER_FUNCPTR (gst_queue_src_activate_mode);
|
|
GST_DEBUG_REGISTER_FUNCPTR (gst_queue_handle_sink_event);
|
|
GST_DEBUG_REGISTER_FUNCPTR (gst_queue_handle_sink_query);
|
|
GST_DEBUG_REGISTER_FUNCPTR (gst_queue_handle_src_event);
|
|
GST_DEBUG_REGISTER_FUNCPTR (gst_queue_handle_src_query);
|
|
GST_DEBUG_REGISTER_FUNCPTR (gst_queue_chain);
|
|
}
|
|
|
|
static void
|
|
gst_queue_init (GstQueue * queue)
|
|
{
|
|
queue->sinkpad = gst_pad_new_from_static_template (&sinktemplate, "sink");
|
|
|
|
gst_pad_set_chain_function (queue->sinkpad, gst_queue_chain);
|
|
gst_pad_set_activatemode_function (queue->sinkpad,
|
|
gst_queue_sink_activate_mode);
|
|
gst_pad_set_event_function (queue->sinkpad, gst_queue_handle_sink_event);
|
|
gst_pad_set_query_function (queue->sinkpad, gst_queue_handle_sink_query);
|
|
GST_PAD_SET_PROXY_CAPS (queue->sinkpad);
|
|
gst_element_add_pad (GST_ELEMENT (queue), queue->sinkpad);
|
|
|
|
queue->srcpad = gst_pad_new_from_static_template (&srctemplate, "src");
|
|
|
|
gst_pad_set_activatemode_function (queue->srcpad,
|
|
gst_queue_src_activate_mode);
|
|
gst_pad_set_event_function (queue->srcpad, gst_queue_handle_src_event);
|
|
gst_pad_set_query_function (queue->srcpad, gst_queue_handle_src_query);
|
|
GST_PAD_SET_PROXY_CAPS (queue->srcpad);
|
|
gst_element_add_pad (GST_ELEMENT (queue), queue->srcpad);
|
|
|
|
GST_QUEUE_CLEAR_LEVEL (queue->cur_level);
|
|
queue->max_size.buffers = DEFAULT_MAX_SIZE_BUFFERS;
|
|
queue->max_size.bytes = DEFAULT_MAX_SIZE_BYTES;
|
|
queue->max_size.time = DEFAULT_MAX_SIZE_TIME;
|
|
GST_QUEUE_CLEAR_LEVEL (queue->min_threshold);
|
|
GST_QUEUE_CLEAR_LEVEL (queue->orig_min_threshold);
|
|
gst_segment_init (&queue->sink_segment, GST_FORMAT_TIME);
|
|
gst_segment_init (&queue->src_segment, GST_FORMAT_TIME);
|
|
queue->head_needs_discont = queue->tail_needs_discont = FALSE;
|
|
|
|
queue->leaky = GST_QUEUE_NO_LEAK;
|
|
queue->srcresult = GST_FLOW_FLUSHING;
|
|
|
|
g_mutex_init (&queue->qlock);
|
|
g_cond_init (&queue->item_add);
|
|
g_cond_init (&queue->item_del);
|
|
|
|
g_queue_init (&queue->queue);
|
|
|
|
queue->sinktime = GST_CLOCK_TIME_NONE;
|
|
queue->srctime = GST_CLOCK_TIME_NONE;
|
|
|
|
queue->sink_tainted = TRUE;
|
|
queue->src_tainted = TRUE;
|
|
|
|
queue->newseg_applied_to_src = FALSE;
|
|
|
|
GST_DEBUG_OBJECT (queue,
|
|
"initialized queue's not_empty & not_full conditions");
|
|
}
|
|
|
|
/* called only once, as opposed to dispose */
|
|
static void
|
|
gst_queue_finalize (GObject * object)
|
|
{
|
|
GstMiniObject *data;
|
|
GstQueue *queue = GST_QUEUE (object);
|
|
|
|
GST_DEBUG_OBJECT (queue, "finalizing queue");
|
|
|
|
while ((data = g_queue_pop_head (&queue->queue))) {
|
|
if (!GST_IS_QUERY (data))
|
|
gst_mini_object_unref (data);
|
|
}
|
|
|
|
g_queue_clear (&queue->queue);
|
|
g_mutex_clear (&queue->qlock);
|
|
g_cond_clear (&queue->item_add);
|
|
g_cond_clear (&queue->item_del);
|
|
|
|
G_OBJECT_CLASS (parent_class)->finalize (object);
|
|
}
|
|
|
|
/* calculate the diff between running time on the sink and src of the queue.
|
|
* This is the total amount of time in the queue. */
|
|
static void
|
|
update_time_level (GstQueue * queue)
|
|
{
|
|
gint64 sink_time, src_time;
|
|
|
|
if (queue->sink_tainted) {
|
|
GST_LOG_OBJECT (queue, "update sink time");
|
|
queue->sinktime =
|
|
gst_segment_to_running_time (&queue->sink_segment, GST_FORMAT_TIME,
|
|
queue->sink_segment.position);
|
|
queue->sink_tainted = FALSE;
|
|
}
|
|
sink_time = queue->sinktime;
|
|
|
|
if (queue->src_tainted) {
|
|
GST_LOG_OBJECT (queue, "update src time");
|
|
queue->srctime =
|
|
gst_segment_to_running_time (&queue->src_segment, GST_FORMAT_TIME,
|
|
queue->src_segment.position);
|
|
queue->src_tainted = FALSE;
|
|
}
|
|
src_time = queue->srctime;
|
|
|
|
GST_LOG_OBJECT (queue, "sink %" GST_TIME_FORMAT ", src %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (sink_time), GST_TIME_ARGS (src_time));
|
|
|
|
if (sink_time >= src_time)
|
|
queue->cur_level.time = sink_time - src_time;
|
|
else
|
|
queue->cur_level.time = 0;
|
|
}
|
|
|
|
/* take a SEGMENT event and apply the values to segment, updating the time
|
|
* level of queue. */
|
|
static void
|
|
apply_segment (GstQueue * queue, GstEvent * event, GstSegment * segment,
|
|
gboolean sink)
|
|
{
|
|
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;
|
|
}
|
|
if (sink)
|
|
queue->sink_tainted = TRUE;
|
|
else
|
|
queue->src_tainted = TRUE;
|
|
|
|
GST_DEBUG_OBJECT (queue, "configured SEGMENT %" GST_SEGMENT_FORMAT, segment);
|
|
|
|
/* segment can update the time level of the queue */
|
|
update_time_level (queue);
|
|
}
|
|
|
|
/* take a buffer and update segment, updating the time level of the queue. */
|
|
static void
|
|
apply_buffer (GstQueue * queue, GstBuffer * buffer, GstSegment * segment,
|
|
gboolean with_duration, gboolean sink)
|
|
{
|
|
GstClockTime duration, timestamp;
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
duration = GST_BUFFER_DURATION (buffer);
|
|
|
|
/* 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 (with_duration && duration != GST_CLOCK_TIME_NONE)
|
|
timestamp += duration;
|
|
|
|
GST_LOG_OBJECT (queue, "position updated to %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (timestamp));
|
|
|
|
segment->position = timestamp;
|
|
if (sink)
|
|
queue->sink_tainted = TRUE;
|
|
else
|
|
queue->src_tainted = TRUE;
|
|
|
|
|
|
/* calc diff with other end */
|
|
update_time_level (queue);
|
|
}
|
|
|
|
static void
|
|
gst_queue_locked_flush (GstQueue * queue)
|
|
{
|
|
GstMiniObject *data;
|
|
|
|
while ((data = g_queue_pop_head (&queue->queue))) {
|
|
/* Then lose another reference because we are supposed to destroy that
|
|
data when flushing */
|
|
if (!GST_IS_QUERY (data))
|
|
gst_mini_object_unref (data);
|
|
}
|
|
GST_QUEUE_CLEAR_LEVEL (queue->cur_level);
|
|
queue->min_threshold.buffers = queue->orig_min_threshold.buffers;
|
|
queue->min_threshold.bytes = queue->orig_min_threshold.bytes;
|
|
queue->min_threshold.time = queue->orig_min_threshold.time;
|
|
gst_segment_init (&queue->sink_segment, GST_FORMAT_TIME);
|
|
gst_segment_init (&queue->src_segment, GST_FORMAT_TIME);
|
|
queue->head_needs_discont = queue->tail_needs_discont = FALSE;
|
|
|
|
queue->sinktime = queue->srctime = GST_CLOCK_TIME_NONE;
|
|
queue->sink_tainted = queue->src_tainted = TRUE;
|
|
|
|
/* we deleted a lot of something */
|
|
GST_QUEUE_SIGNAL_DEL (queue);
|
|
}
|
|
|
|
/* enqueue an item an update the level stats, with QUEUE_LOCK */
|
|
static inline void
|
|
gst_queue_locked_enqueue_buffer (GstQueue * queue, gpointer item)
|
|
{
|
|
GstBuffer *buffer = GST_BUFFER_CAST (item);
|
|
|
|
/* add buffer to the statistics */
|
|
queue->cur_level.buffers++;
|
|
queue->cur_level.bytes += gst_buffer_get_size (buffer);
|
|
apply_buffer (queue, buffer, &queue->sink_segment, TRUE, TRUE);
|
|
|
|
g_queue_push_tail (&queue->queue, item);
|
|
GST_QUEUE_SIGNAL_ADD (queue);
|
|
}
|
|
|
|
static inline void
|
|
gst_queue_locked_enqueue_event (GstQueue * queue, gpointer item)
|
|
{
|
|
GstEvent *event = GST_EVENT_CAST (item);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
/* Zero the thresholds, this makes sure the queue is completely
|
|
* filled and we can read all data from the queue. */
|
|
GST_QUEUE_CLEAR_LEVEL (queue->min_threshold);
|
|
/* mark the queue as EOS. This prevents us from accepting more data. */
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "got EOS from upstream");
|
|
queue->eos = TRUE;
|
|
break;
|
|
case GST_EVENT_SEGMENT:
|
|
apply_segment (queue, event, &queue->sink_segment, TRUE);
|
|
/* if the queue is empty, apply sink segment on the source */
|
|
if (queue->queue.length == 0) {
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "Apply segment on srcpad");
|
|
apply_segment (queue, event, &queue->src_segment, FALSE);
|
|
queue->newseg_applied_to_src = TRUE;
|
|
}
|
|
/* a new segment allows us to accept more buffers if we got EOS
|
|
* from downstream */
|
|
queue->unexpected = FALSE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
g_queue_push_tail (&queue->queue, item);
|
|
GST_QUEUE_SIGNAL_ADD (queue);
|
|
}
|
|
|
|
/* dequeue an item from the queue and update level stats, with QUEUE_LOCK */
|
|
static GstMiniObject *
|
|
gst_queue_locked_dequeue (GstQueue * queue)
|
|
{
|
|
GstMiniObject *item;
|
|
|
|
item = g_queue_pop_head (&queue->queue);
|
|
if (item == NULL)
|
|
goto no_item;
|
|
|
|
if (GST_IS_BUFFER (item)) {
|
|
GstBuffer *buffer = GST_BUFFER_CAST (item);
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"retrieved buffer %p from queue", buffer);
|
|
|
|
queue->cur_level.buffers--;
|
|
queue->cur_level.bytes -= gst_buffer_get_size (buffer);
|
|
apply_buffer (queue, buffer, &queue->src_segment, TRUE, FALSE);
|
|
|
|
/* if the queue is empty now, update the other side */
|
|
if (queue->cur_level.buffers == 0)
|
|
queue->cur_level.time = 0;
|
|
|
|
} else if (GST_IS_EVENT (item)) {
|
|
GstEvent *event = GST_EVENT_CAST (item);
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"retrieved event %p from queue", event);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
/* queue is empty now that we dequeued the EOS */
|
|
GST_QUEUE_CLEAR_LEVEL (queue->cur_level);
|
|
break;
|
|
case GST_EVENT_SEGMENT:
|
|
/* apply newsegment if it has not already been applied */
|
|
if (G_LIKELY (!queue->newseg_applied_to_src)) {
|
|
apply_segment (queue, event, &queue->src_segment, FALSE);
|
|
} else {
|
|
queue->newseg_applied_to_src = FALSE;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
} else if (GST_IS_QUERY (item)) {
|
|
GstQuery *query = GST_QUERY_CAST (item);
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"retrieved query %p from queue", query);
|
|
} else {
|
|
g_warning
|
|
("Unexpected item %p dequeued from queue %s (refcounting problem?)",
|
|
item, GST_OBJECT_NAME (queue));
|
|
item = NULL;
|
|
}
|
|
GST_QUEUE_SIGNAL_DEL (queue);
|
|
|
|
return item;
|
|
|
|
/* ERRORS */
|
|
no_item:
|
|
{
|
|
GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "the queue is empty");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_queue_handle_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
GstQueue *queue;
|
|
|
|
queue = GST_QUEUE (parent);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
{
|
|
STATUS (queue, pad, "received flush start event");
|
|
/* forward event */
|
|
gst_pad_push_event (queue->srcpad, event);
|
|
|
|
/* now unblock the chain function */
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
queue->srcresult = GST_FLOW_FLUSHING;
|
|
/* unblock the loop and chain functions */
|
|
GST_QUEUE_SIGNAL_ADD (queue);
|
|
GST_QUEUE_SIGNAL_DEL (queue);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
/* make sure it pauses, this should happen since we sent
|
|
* flush_start downstream. */
|
|
gst_pad_pause_task (queue->srcpad);
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "loop stopped");
|
|
goto done;
|
|
}
|
|
case GST_EVENT_FLUSH_STOP:
|
|
{
|
|
STATUS (queue, pad, "received flush stop event");
|
|
/* forward event */
|
|
gst_pad_push_event (queue->srcpad, event);
|
|
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
gst_queue_locked_flush (queue);
|
|
queue->srcresult = GST_FLOW_OK;
|
|
queue->eos = FALSE;
|
|
queue->unexpected = FALSE;
|
|
gst_pad_start_task (queue->srcpad, (GstTaskFunction) gst_queue_loop,
|
|
queue->srcpad, NULL);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
STATUS (queue, pad, "after flush");
|
|
goto done;
|
|
}
|
|
default:
|
|
if (GST_EVENT_IS_SERIALIZED (event)) {
|
|
/* serialized events go in the queue */
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
/* refuse more events on EOS */
|
|
if (queue->eos)
|
|
goto out_eos;
|
|
gst_queue_locked_enqueue_event (queue, event);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
} else {
|
|
/* non-serialized events are passed upstream. */
|
|
gst_pad_push_event (queue->srcpad, event);
|
|
}
|
|
break;
|
|
}
|
|
done:
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
out_flushing:
|
|
{
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"refusing event, we are flushing");
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
out_eos:
|
|
{
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "refusing event, we are EOS");
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
gst_event_unref (event);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_queue_handle_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
GstQueue *queue = GST_QUEUE_CAST (parent);
|
|
gboolean res;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
default:
|
|
if (G_UNLIKELY (GST_QUERY_IS_SERIALIZED (query))) {
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
GST_LOG_OBJECT (queue, "queuing query %p (%s)", query,
|
|
GST_QUERY_TYPE_NAME (query));
|
|
g_queue_push_tail (&queue->queue, query);
|
|
GST_QUEUE_SIGNAL_ADD (queue);
|
|
while (queue->queue.length != 0) {
|
|
/* for as long as the queue has items, we know the query is
|
|
* not handled yet */
|
|
GST_QUEUE_WAIT_DEL_CHECK (queue, out_flushing);
|
|
}
|
|
res = queue->last_query;
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
} else {
|
|
res = gst_pad_query_default (pad, parent, query);
|
|
}
|
|
break;
|
|
}
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
out_flushing:
|
|
{
|
|
GST_DEBUG_OBJECT (queue, "we are flushing");
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_queue_is_empty (GstQueue * queue)
|
|
{
|
|
if (queue->queue.length == 0)
|
|
return TRUE;
|
|
|
|
/* It is possible that a max size is reached before all min thresholds are.
|
|
* Therefore, only consider it empty if it is not filled. */
|
|
return ((queue->min_threshold.buffers > 0 &&
|
|
queue->cur_level.buffers < queue->min_threshold.buffers) ||
|
|
(queue->min_threshold.bytes > 0 &&
|
|
queue->cur_level.bytes < queue->min_threshold.bytes) ||
|
|
(queue->min_threshold.time > 0 &&
|
|
queue->cur_level.time < queue->min_threshold.time)) &&
|
|
!gst_queue_is_filled (queue);
|
|
}
|
|
|
|
static gboolean
|
|
gst_queue_is_filled (GstQueue * queue)
|
|
{
|
|
return (((queue->max_size.buffers > 0 &&
|
|
queue->cur_level.buffers >= queue->max_size.buffers) ||
|
|
(queue->max_size.bytes > 0 &&
|
|
queue->cur_level.bytes >= queue->max_size.bytes) ||
|
|
(queue->max_size.time > 0 &&
|
|
queue->cur_level.time >= queue->max_size.time)));
|
|
}
|
|
|
|
static void
|
|
gst_queue_leak_downstream (GstQueue * queue)
|
|
{
|
|
/* for as long as the queue is filled, dequeue an item and discard it */
|
|
while (gst_queue_is_filled (queue)) {
|
|
GstMiniObject *leak;
|
|
|
|
leak = gst_queue_locked_dequeue (queue);
|
|
/* there is nothing to dequeue and the queue is still filled.. This should
|
|
* not happen */
|
|
g_assert (leak != NULL);
|
|
|
|
GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
|
|
"queue is full, leaking item %p on downstream end", leak);
|
|
if (!GST_IS_QUERY (leak))
|
|
gst_mini_object_unref (leak);
|
|
|
|
/* last buffer needs to get a DISCONT flag */
|
|
queue->head_needs_discont = TRUE;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_queue_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
|
|
{
|
|
GstQueue *queue;
|
|
GstClockTime duration, timestamp;
|
|
|
|
queue = GST_QUEUE_CAST (parent);
|
|
|
|
/* we have to lock the queue since we span threads */
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
/* when we received EOS, we refuse any more data */
|
|
if (queue->eos)
|
|
goto out_eos;
|
|
if (queue->unexpected)
|
|
goto out_unexpected;
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
duration = GST_BUFFER_DURATION (buffer);
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "received buffer %p of size %"
|
|
G_GSIZE_FORMAT ", time %" GST_TIME_FORMAT ", duration %"
|
|
GST_TIME_FORMAT, buffer, gst_buffer_get_size (buffer),
|
|
GST_TIME_ARGS (timestamp), GST_TIME_ARGS (duration));
|
|
|
|
/* We make space available if we're "full" according to whatever
|
|
* the user defined as "full". Note that this only applies to buffers.
|
|
* We always handle events and they don't count in our statistics. */
|
|
while (gst_queue_is_filled (queue)) {
|
|
if (!queue->silent) {
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
g_signal_emit (queue, gst_queue_signals[SIGNAL_OVERRUN], 0);
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
/* we recheck, the signal could have changed the thresholds */
|
|
if (!gst_queue_is_filled (queue))
|
|
break;
|
|
}
|
|
|
|
/* how are we going to make space for this buffer? */
|
|
switch (queue->leaky) {
|
|
case GST_QUEUE_LEAK_UPSTREAM:
|
|
/* next buffer needs to get a DISCONT flag */
|
|
queue->tail_needs_discont = TRUE;
|
|
/* leak current buffer */
|
|
GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
|
|
"queue is full, leaking buffer on upstream end");
|
|
/* now we can clean up and exit right away */
|
|
goto out_unref;
|
|
case GST_QUEUE_LEAK_DOWNSTREAM:
|
|
gst_queue_leak_downstream (queue);
|
|
break;
|
|
default:
|
|
g_warning ("Unknown leaky type, using default");
|
|
/* fall-through */
|
|
case GST_QUEUE_NO_LEAK:
|
|
{
|
|
GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
|
|
"queue is full, waiting for free space");
|
|
|
|
/* don't leak. Instead, wait for space to be available */
|
|
do {
|
|
/* for as long as the queue is filled, wait till an item was deleted. */
|
|
GST_QUEUE_WAIT_DEL_CHECK (queue, out_flushing);
|
|
} while (gst_queue_is_filled (queue));
|
|
|
|
GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "queue is not full");
|
|
|
|
if (!queue->silent) {
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
g_signal_emit (queue, gst_queue_signals[SIGNAL_RUNNING], 0);
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (queue->tail_needs_discont) {
|
|
GstBuffer *subbuffer = gst_buffer_make_writable (buffer);
|
|
|
|
if (subbuffer) {
|
|
buffer = subbuffer;
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
|
|
} else {
|
|
GST_DEBUG_OBJECT (queue, "Could not mark buffer as DISCONT");
|
|
}
|
|
queue->tail_needs_discont = FALSE;
|
|
}
|
|
|
|
/* put buffer in queue now */
|
|
gst_queue_locked_enqueue_buffer (queue, buffer);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
return GST_FLOW_OK;
|
|
|
|
/* special conditions */
|
|
out_unref:
|
|
{
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
return GST_FLOW_OK;
|
|
}
|
|
out_flushing:
|
|
{
|
|
GstFlowReturn ret = queue->srcresult;
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"exit because task paused, reason: %s", gst_flow_get_name (ret));
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
gst_buffer_unref (buffer);
|
|
|
|
return ret;
|
|
}
|
|
out_eos:
|
|
{
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "exit because we received EOS");
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
return GST_FLOW_EOS;
|
|
}
|
|
out_unexpected:
|
|
{
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "exit because we received EOS");
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
return GST_FLOW_EOS;
|
|
}
|
|
}
|
|
|
|
/* dequeue an item from the queue an push it downstream. This functions returns
|
|
* the result of the push. */
|
|
static GstFlowReturn
|
|
gst_queue_push_one (GstQueue * queue)
|
|
{
|
|
GstFlowReturn result = GST_FLOW_OK;
|
|
GstMiniObject *data;
|
|
|
|
data = gst_queue_locked_dequeue (queue);
|
|
if (data == NULL)
|
|
goto no_item;
|
|
|
|
next:
|
|
if (GST_IS_BUFFER (data)) {
|
|
GstBuffer *buffer;
|
|
|
|
buffer = GST_BUFFER_CAST (data);
|
|
|
|
if (queue->head_needs_discont) {
|
|
GstBuffer *subbuffer = gst_buffer_make_writable (buffer);
|
|
|
|
if (subbuffer) {
|
|
buffer = subbuffer;
|
|
GST_BUFFER_FLAG_SET (buffer, GST_BUFFER_FLAG_DISCONT);
|
|
} else {
|
|
GST_DEBUG_OBJECT (queue, "Could not mark buffer as DISCONT");
|
|
}
|
|
queue->head_needs_discont = FALSE;
|
|
}
|
|
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
result = gst_pad_push (queue->srcpad, buffer);
|
|
|
|
/* need to check for srcresult here as well */
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
|
|
if (result == GST_FLOW_EOS) {
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "got EOS from downstream");
|
|
/* stop pushing buffers, we dequeue all items until we see an item that we
|
|
* can push again, which is EOS or SEGMENT. If there is nothing in the
|
|
* queue we can push, we set a flag to make the sinkpad refuse more
|
|
* buffers with an EOS return value. */
|
|
while ((data = gst_queue_locked_dequeue (queue))) {
|
|
if (GST_IS_BUFFER (data)) {
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"dropping EOS buffer %p", data);
|
|
gst_buffer_unref (GST_BUFFER_CAST (data));
|
|
} else if (GST_IS_EVENT (data)) {
|
|
GstEvent *event = GST_EVENT_CAST (data);
|
|
GstEventType type = GST_EVENT_TYPE (event);
|
|
|
|
if (type == GST_EVENT_EOS || type == GST_EVENT_SEGMENT) {
|
|
/* we found a pushable item in the queue, push it out */
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"pushing pushable event %s after EOS",
|
|
GST_EVENT_TYPE_NAME (event));
|
|
goto next;
|
|
}
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"dropping EOS event %p", event);
|
|
gst_event_unref (event);
|
|
} else if (GST_IS_QUERY (data)) {
|
|
GstQuery *query = GST_QUERY_CAST (data);
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"dropping query %p because of EOS", query);
|
|
queue->last_query = FALSE;
|
|
}
|
|
}
|
|
/* no more items in the queue. Set the unexpected flag so that upstream
|
|
* make us refuse any more buffers on the sinkpad. Since we will still
|
|
* accept EOS and SEGMENT we return _FLOW_OK to the caller so that the
|
|
* task function does not shut down. */
|
|
queue->unexpected = TRUE;
|
|
result = GST_FLOW_OK;
|
|
}
|
|
} else if (GST_IS_EVENT (data)) {
|
|
GstEvent *event = GST_EVENT_CAST (data);
|
|
GstEventType type = GST_EVENT_TYPE (event);
|
|
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
gst_pad_push_event (queue->srcpad, event);
|
|
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
/* if we're EOS, return EOS so that the task pauses. */
|
|
if (type == GST_EVENT_EOS) {
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"pushed EOS event %p, return EOS", event);
|
|
result = GST_FLOW_EOS;
|
|
}
|
|
} else if (GST_IS_QUERY (data)) {
|
|
GstQuery *query = GST_QUERY_CAST (data);
|
|
|
|
queue->last_query = gst_pad_peer_query (queue->srcpad, query);
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"did query %p, return %d", query, queue->last_query);
|
|
}
|
|
return result;
|
|
|
|
/* ERRORS */
|
|
no_item:
|
|
{
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"exit because we have no item in the queue");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
out_flushing:
|
|
{
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "exit because we are flushing");
|
|
return GST_FLOW_FLUSHING;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_queue_loop (GstPad * pad)
|
|
{
|
|
GstQueue *queue;
|
|
GstFlowReturn ret;
|
|
|
|
queue = (GstQueue *) GST_PAD_PARENT (pad);
|
|
|
|
/* have to lock for thread-safety */
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
|
|
while (gst_queue_is_empty (queue)) {
|
|
GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "queue is empty");
|
|
if (!queue->silent) {
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
g_signal_emit (queue, gst_queue_signals[SIGNAL_UNDERRUN], 0);
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
}
|
|
|
|
/* we recheck, the signal could have changed the thresholds */
|
|
while (gst_queue_is_empty (queue)) {
|
|
GST_QUEUE_WAIT_ADD_CHECK (queue, out_flushing);
|
|
}
|
|
|
|
GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "queue is not empty");
|
|
if (!queue->silent) {
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
g_signal_emit (queue, gst_queue_signals[SIGNAL_RUNNING], 0);
|
|
g_signal_emit (queue, gst_queue_signals[SIGNAL_PUSHING], 0);
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
}
|
|
}
|
|
|
|
ret = gst_queue_push_one (queue);
|
|
queue->srcresult = ret;
|
|
if (ret != GST_FLOW_OK)
|
|
goto out_flushing;
|
|
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
return;
|
|
|
|
/* ERRORS */
|
|
out_flushing:
|
|
{
|
|
gboolean eos = queue->eos;
|
|
GstFlowReturn ret = queue->srcresult;
|
|
|
|
gst_pad_pause_task (queue->srcpad);
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"pause task, reason: %s", gst_flow_get_name (ret));
|
|
if (ret == GST_FLOW_FLUSHING)
|
|
gst_queue_locked_flush (queue);
|
|
else
|
|
GST_QUEUE_SIGNAL_DEL (queue);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
/* let app know about us giving up if upstream is not expected to do so */
|
|
/* EOS is already taken care of elsewhere */
|
|
if (eos && (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS)) {
|
|
GST_ELEMENT_ERROR (queue, STREAM, FAILED,
|
|
(_("Internal data flow error.")),
|
|
("streaming task paused, reason %s (%d)",
|
|
gst_flow_get_name (ret), ret));
|
|
gst_pad_push_event (queue->srcpad, gst_event_new_eos ());
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_queue_handle_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|
{
|
|
gboolean res = TRUE;
|
|
GstQueue *queue = GST_QUEUE (parent);
|
|
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "got event %p (%d)",
|
|
event, GST_EVENT_TYPE (event));
|
|
#endif
|
|
|
|
res = gst_pad_push_event (queue->sinkpad, event);
|
|
|
|
return res;
|
|
}
|
|
|
|
static gboolean
|
|
gst_queue_handle_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
|
|
{
|
|
GstQueue *queue = GST_QUEUE (parent);
|
|
gboolean res;
|
|
|
|
res = gst_pad_query_default (pad, parent, query);
|
|
if (!res)
|
|
return FALSE;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_POSITION:
|
|
{
|
|
gint64 peer_pos;
|
|
GstFormat format;
|
|
|
|
/* get peer position */
|
|
gst_query_parse_position (query, &format, &peer_pos);
|
|
|
|
/* FIXME: this code assumes that there's no discont in the queue */
|
|
switch (format) {
|
|
case GST_FORMAT_BYTES:
|
|
peer_pos -= queue->cur_level.bytes;
|
|
break;
|
|
case GST_FORMAT_TIME:
|
|
peer_pos -= queue->cur_level.time;
|
|
break;
|
|
default:
|
|
GST_DEBUG_OBJECT (queue, "Can't adjust query in %s format, don't "
|
|
"know how to adjust value", gst_format_get_name (format));
|
|
return TRUE;
|
|
}
|
|
/* set updated position */
|
|
gst_query_set_position (query, format, peer_pos);
|
|
break;
|
|
}
|
|
case GST_QUERY_LATENCY:
|
|
{
|
|
gboolean live;
|
|
GstClockTime min, max;
|
|
|
|
gst_query_parse_latency (query, &live, &min, &max);
|
|
|
|
/* we can delay up to the limit of the queue in time. If we have no time
|
|
* limit, the best thing we can do is to return an infinite delay. In
|
|
* reality a better estimate would be the byte/buffer rate but that is not
|
|
* possible right now. */
|
|
if (queue->max_size.time > 0 && max != -1)
|
|
max += queue->max_size.time;
|
|
else
|
|
max = -1;
|
|
|
|
/* adjust for min-threshold */
|
|
if (queue->min_threshold.time > 0 && min != -1)
|
|
min += queue->min_threshold.time;
|
|
|
|
gst_query_set_latency (query, live, min, max);
|
|
break;
|
|
}
|
|
default:
|
|
/* peer handled other queries */
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_queue_sink_activate_mode (GstPad * pad, GstObject * parent, GstPadMode mode,
|
|
gboolean active)
|
|
{
|
|
gboolean result;
|
|
GstQueue *queue;
|
|
|
|
queue = GST_QUEUE (parent);
|
|
|
|
switch (mode) {
|
|
case GST_PAD_MODE_PUSH:
|
|
if (active) {
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
queue->srcresult = GST_FLOW_OK;
|
|
queue->eos = FALSE;
|
|
queue->unexpected = FALSE;
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
} else {
|
|
/* step 1, unblock chain function */
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
queue->srcresult = GST_FLOW_FLUSHING;
|
|
gst_queue_locked_flush (queue);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
}
|
|
result = TRUE;
|
|
break;
|
|
default:
|
|
result = FALSE;
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_queue_src_activate_mode (GstPad * pad, GstObject * parent, GstPadMode mode,
|
|
gboolean active)
|
|
{
|
|
gboolean result;
|
|
GstQueue *queue;
|
|
|
|
queue = GST_QUEUE (parent);
|
|
|
|
switch (mode) {
|
|
case GST_PAD_MODE_PUSH:
|
|
if (active) {
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
queue->srcresult = GST_FLOW_OK;
|
|
queue->eos = FALSE;
|
|
queue->unexpected = FALSE;
|
|
result =
|
|
gst_pad_start_task (pad, (GstTaskFunction) gst_queue_loop, pad,
|
|
NULL);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
} else {
|
|
/* step 1, unblock loop function */
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
queue->srcresult = GST_FLOW_FLUSHING;
|
|
/* the item add signal will unblock */
|
|
g_cond_signal (&queue->item_add);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
/* step 2, make sure streaming finishes */
|
|
result = gst_pad_stop_task (pad);
|
|
}
|
|
break;
|
|
default:
|
|
result = FALSE;
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static void
|
|
queue_capacity_change (GstQueue * queue)
|
|
{
|
|
if (queue->leaky == GST_QUEUE_LEAK_DOWNSTREAM) {
|
|
gst_queue_leak_downstream (queue);
|
|
}
|
|
|
|
/* changing the capacity of the queue must wake up
|
|
* the _chain function, it might have more room now
|
|
* to store the buffer/event in the queue */
|
|
GST_QUEUE_SIGNAL_DEL (queue);
|
|
}
|
|
|
|
/* Changing the minimum required fill level must
|
|
* wake up the _loop function as it might now
|
|
* be able to preceed.
|
|
*/
|
|
#define QUEUE_THRESHOLD_CHANGE(q)\
|
|
GST_QUEUE_SIGNAL_ADD (q);
|
|
|
|
static void
|
|
gst_queue_set_property (GObject * object,
|
|
guint prop_id, const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstQueue *queue = GST_QUEUE (object);
|
|
|
|
/* someone could change levels here, and since this
|
|
* affects the get/put funcs, we need to lock for safety. */
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
|
|
switch (prop_id) {
|
|
case PROP_MAX_SIZE_BYTES:
|
|
queue->max_size.bytes = g_value_get_uint (value);
|
|
queue_capacity_change (queue);
|
|
break;
|
|
case PROP_MAX_SIZE_BUFFERS:
|
|
queue->max_size.buffers = g_value_get_uint (value);
|
|
queue_capacity_change (queue);
|
|
break;
|
|
case PROP_MAX_SIZE_TIME:
|
|
queue->max_size.time = g_value_get_uint64 (value);
|
|
queue_capacity_change (queue);
|
|
break;
|
|
case PROP_MIN_THRESHOLD_BYTES:
|
|
queue->min_threshold.bytes = g_value_get_uint (value);
|
|
queue->orig_min_threshold.bytes = queue->min_threshold.bytes;
|
|
QUEUE_THRESHOLD_CHANGE (queue);
|
|
break;
|
|
case PROP_MIN_THRESHOLD_BUFFERS:
|
|
queue->min_threshold.buffers = g_value_get_uint (value);
|
|
queue->orig_min_threshold.buffers = queue->min_threshold.buffers;
|
|
QUEUE_THRESHOLD_CHANGE (queue);
|
|
break;
|
|
case PROP_MIN_THRESHOLD_TIME:
|
|
queue->min_threshold.time = g_value_get_uint64 (value);
|
|
queue->orig_min_threshold.time = queue->min_threshold.time;
|
|
QUEUE_THRESHOLD_CHANGE (queue);
|
|
break;
|
|
case PROP_LEAKY:
|
|
queue->leaky = g_value_get_enum (value);
|
|
break;
|
|
case PROP_SILENT:
|
|
queue->silent = g_value_get_boolean (value);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
}
|
|
|
|
static void
|
|
gst_queue_get_property (GObject * object,
|
|
guint prop_id, GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstQueue *queue = GST_QUEUE (object);
|
|
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
|
|
switch (prop_id) {
|
|
case PROP_CUR_LEVEL_BYTES:
|
|
g_value_set_uint (value, queue->cur_level.bytes);
|
|
break;
|
|
case PROP_CUR_LEVEL_BUFFERS:
|
|
g_value_set_uint (value, queue->cur_level.buffers);
|
|
break;
|
|
case PROP_CUR_LEVEL_TIME:
|
|
g_value_set_uint64 (value, queue->cur_level.time);
|
|
break;
|
|
case PROP_MAX_SIZE_BYTES:
|
|
g_value_set_uint (value, queue->max_size.bytes);
|
|
break;
|
|
case PROP_MAX_SIZE_BUFFERS:
|
|
g_value_set_uint (value, queue->max_size.buffers);
|
|
break;
|
|
case PROP_MAX_SIZE_TIME:
|
|
g_value_set_uint64 (value, queue->max_size.time);
|
|
break;
|
|
case PROP_MIN_THRESHOLD_BYTES:
|
|
g_value_set_uint (value, queue->min_threshold.bytes);
|
|
break;
|
|
case PROP_MIN_THRESHOLD_BUFFERS:
|
|
g_value_set_uint (value, queue->min_threshold.buffers);
|
|
break;
|
|
case PROP_MIN_THRESHOLD_TIME:
|
|
g_value_set_uint64 (value, queue->min_threshold.time);
|
|
break;
|
|
case PROP_LEAKY:
|
|
g_value_set_enum (value, queue->leaky);
|
|
break;
|
|
case PROP_SILENT:
|
|
g_value_set_boolean (value, queue->silent);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
}
|