--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/gst_plugins_base/gst/playback/gstqueue2.c Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,2016 @@
+/* GStreamer
+ * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
+ * 2003 Colin Walters <cwalters@gnome.org>
+ * 2000,2005,2007 Wim Taymans <wim.taymans@gmail.com>
+ * 2007 Thiago Sousa Santos <thiagoss@lcc.ufcg.edu.br>
+ *
+ * gstqueue2.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-queue2
+ * @short_description: Asynchronous data 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.
+ *
+ * The default queue size limits are 100 buffers, 2MB of data, or
+ * two seconds worth of data, whichever is reached first.
+ *
+ * If you set temp-location, the element will buffer data on the file
+ * specified by it. By using this, it will buffer the entire
+ * stream data on the file independently of the queue size limits, they
+ * will only be used for buffering statistics.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <glib/gstdio.h>
+
+#include <gst/gst.h>
+#include <gst/gst-i18n-plugin.h>
+
+#ifdef __SYMBIAN32__
+#include <glib_global.h>
+#endif
+static const GstElementDetails gst_queue_details = GST_ELEMENT_DETAILS ("Queue",
+ "Generic",
+ "Simple data queue",
+ "Erik Walthinsen <omega@cse.ogi.edu>, "
+ "Wim Taymans <wim.taymans@gmail.com>");
+
+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);
+
+enum
+{
+ LAST_SIGNAL
+};
+
+/* default property values */
+#define DEFAULT_MAX_SIZE_BUFFERS 100 /* 100 buffers */
+#define DEFAULT_MAX_SIZE_BYTES (2 * 1024 * 1024) /* 2 MB */
+#define DEFAULT_MAX_SIZE_TIME 2 * GST_SECOND /* 2 seconds */
+#define DEFAULT_USE_BUFFERING FALSE
+#define DEFAULT_USE_RATE_ESTIMATE TRUE
+#define DEFAULT_LOW_PERCENT 10
+#define DEFAULT_HIGH_PERCENT 99
+
+/* other defines */
+#define DEFAULT_BUFFER_SIZE 4096
+#define QUEUE_IS_USING_TEMP_FILE(queue) (queue->temp_location != NULL)
+
+enum
+{
+ PROP_0,
+ 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_USE_BUFFERING,
+ PROP_USE_RATE_ESTIMATE,
+ PROP_LOW_PERCENT,
+ PROP_HIGH_PERCENT,
+ PROP_TEMP_LOCATION
+};
+
+#define GST_TYPE_QUEUE \
+ (gst_queue_get_type())
+#define GST_QUEUE(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QUEUE,GstQueue))
+#define GST_QUEUE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QUEUE,GstQueueClass))
+#define GST_IS_QUEUE(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QUEUE))
+#define GST_IS_QUEUE_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QUEUE))
+#define GST_QUEUE_CAST(obj) \
+ ((GstQueue *)(obj))
+
+typedef struct _GstQueue GstQueue;
+typedef struct _GstQueueSize GstQueueSize;
+typedef struct _GstQueueClass GstQueueClass;
+
+/* used to keep track of sizes (current and max) */
+struct _GstQueueSize
+{
+ guint buffers;
+ guint bytes;
+ guint64 time;
+ guint64 rate_time;
+};
+
+#define GST_QUEUE_CLEAR_LEVEL(l) G_STMT_START { \
+ l.buffers = 0; \
+ l.bytes = 0; \
+ l.time = 0; \
+ l.rate_time = 0; \
+} G_STMT_END
+
+struct _GstQueue
+{
+ GstElement element;
+
+ /*< private > */
+ GstPad *sinkpad;
+ GstPad *srcpad;
+
+ /* segments to keep track of timestamps */
+ GstSegment sink_segment;
+ GstSegment src_segment;
+
+ /* flowreturn when srcpad is paused */
+ GstFlowReturn srcresult;
+ gboolean is_eos;
+ gboolean unexpected;
+
+ /* the queue of data we're keeping our hands on */
+ GQueue *queue;
+
+ GstQueueSize cur_level; /* currently in the queue */
+ GstQueueSize max_level; /* max. amount of data allowed in the queue */
+ gboolean use_buffering;
+ gboolean use_rate_estimate;
+ GstClockTime buffering_interval;
+ gint low_percent; /* low/high watermarks for buffering */
+ gint high_percent;
+
+ /* current buffering state */
+ gboolean is_buffering;
+ guint buffering_iteration;
+
+ /* for measuring input/output rates */
+ GTimer *in_timer;
+ gboolean in_timer_started;
+ gdouble last_in_elapsed;
+ guint64 bytes_in;
+ gdouble byte_in_rate;
+
+ GTimer *out_timer;
+ gboolean out_timer_started;
+ gdouble last_out_elapsed;
+ guint64 bytes_out;
+ gdouble byte_out_rate;
+
+ GMutex *qlock; /* lock for queue (vs object lock) */
+ gboolean waiting_add;
+ GCond *item_add; /* signals buffers now available for reading */
+ gboolean waiting_del;
+ GCond *item_del; /* signals space now available for writing */
+
+ /* temp location stuff */
+ gchar *temp_location;
+ FILE *temp_file;
+ guint64 writing_pos;
+ guint64 reading_pos;
+ /* we need this to send the first new segment event of the stream
+ * because we can't save it on the file */
+ gboolean segment_event_received;
+ GstEvent *starting_segment;
+
+};
+
+struct _GstQueueClass
+{
+ GstElementClass parent_class;
+};
+
+#define STATUS(queue, pad, msg) \
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue, \
+ "(%s:%s) " msg ": %u of %u buffers, %u of %u " \
+ "bytes, %" G_GUINT64_FORMAT " of %" G_GUINT64_FORMAT \
+ " ns, %"G_GUINT64_FORMAT" items", \
+ GST_DEBUG_PAD_NAME (pad), \
+ queue->cur_level.buffers, \
+ queue->max_level.buffers, \
+ queue->cur_level.bytes, \
+ queue->max_level.bytes, \
+ queue->cur_level.time, \
+ queue->max_level.time, \
+ (guint64) (QUEUE_IS_USING_TEMP_FILE(queue) ? \
+ queue->writing_pos - queue->reading_pos : \
+ queue->queue->length))
+
+#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 (queue, q->sinkpad, "wait for DEL"); \
+ q->waiting_del = TRUE; \
+ g_cond_wait (q->item_del, queue->qlock); \
+ q->waiting_del = FALSE; \
+ if (q->srcresult != GST_FLOW_OK) { \
+ STATUS (queue, q->srcpad, "received DEL wakeup"); \
+ goto label; \
+ } \
+ STATUS (queue, q->sinkpad, "received DEL"); \
+} G_STMT_END
+
+#define GST_QUEUE_WAIT_ADD_CHECK(q, label) G_STMT_START { \
+ STATUS (queue, 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 (queue, q->srcpad, "received ADD wakeup"); \
+ goto label; \
+ } \
+ STATUS (queue, 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(bla) \
+
+/* can't use boilerplate as we need to register with Queue2 to avoid conflicts
+ * with queue in core elements */
+static void gst_queue_class_init (GstQueueClass * klass);
+static void gst_queue_init (GstQueue * queue, GstQueueClass * g_class);
+static GstElementClass *parent_class;
+
+static GType
+gst_queue_get_type (void)
+{
+ static GType gst_queue_type = 0;
+
+ if (!gst_queue_type) {
+ static const GTypeInfo gst_queue_info = {
+ sizeof (GstQueueClass),
+ NULL,
+ NULL,
+ (GClassInitFunc) gst_queue_class_init,
+ NULL,
+ NULL,
+ sizeof (GstQueue),
+ 0,
+ (GInstanceInitFunc) gst_queue_init,
+ NULL
+ };
+
+ gst_queue_type =
+ g_type_register_static (GST_TYPE_ELEMENT, "GstQueue2",
+ &gst_queue_info, 0);
+ }
+ return gst_queue_type;
+}
+
+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, GstBuffer * buffer);
+static GstFlowReturn gst_queue_bufferalloc (GstPad * pad, guint64 offset,
+ guint size, GstCaps * caps, GstBuffer ** buf);
+static GstFlowReturn gst_queue_push_one (GstQueue * queue);
+static void gst_queue_loop (GstPad * pad);
+
+static gboolean gst_queue_handle_sink_event (GstPad * pad, GstEvent * event);
+
+static gboolean gst_queue_handle_src_event (GstPad * pad, GstEvent * event);
+static gboolean gst_queue_handle_src_query (GstPad * pad, GstQuery * query);
+
+static GstCaps *gst_queue_getcaps (GstPad * pad);
+
+static GstFlowReturn gst_queue_get_range (GstPad * pad, guint64 offset,
+ guint length, GstBuffer ** buffer);
+static gboolean gst_queue_src_checkgetrange_function (GstPad * pad);
+
+static gboolean gst_queue_src_activate_pull (GstPad * pad, gboolean active);
+static gboolean gst_queue_src_activate_push (GstPad * pad, gboolean active);
+static gboolean gst_queue_sink_activate_push (GstPad * pad, gboolean active);
+static GstStateChangeReturn gst_queue_change_state (GstElement * element,
+ GstStateChange transition);
+
+static gboolean gst_queue_is_empty (GstQueue * queue);
+static gboolean gst_queue_is_filled (GstQueue * queue);
+
+/* 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);
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_queue_set_property);
+ gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_queue_get_property);
+
+ /* 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_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_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_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_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_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_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",
+ DEFAULT_USE_BUFFERING, G_PARAM_READWRITE));
+ g_object_class_install_property (gobject_class, PROP_USE_RATE_ESTIMATE,
+ g_param_spec_boolean ("use-rate-estimate", "Use Rate Estimate",
+ "Estimate the bitrate of the stream to calculate time level",
+ DEFAULT_USE_RATE_ESTIMATE, G_PARAM_READWRITE));
+ g_object_class_install_property (gobject_class, PROP_LOW_PERCENT,
+ g_param_spec_int ("low-percent", "Low percent",
+ "Low threshold for buffering to start",
+ 0, 100, DEFAULT_LOW_PERCENT, G_PARAM_READWRITE));
+ g_object_class_install_property (gobject_class, PROP_HIGH_PERCENT,
+ g_param_spec_int ("high-percent", "High percent",
+ "High threshold for buffering to finish",
+ 0, 100, DEFAULT_HIGH_PERCENT, G_PARAM_READWRITE));
+
+ g_object_class_install_property (gobject_class, PROP_TEMP_LOCATION,
+ g_param_spec_string ("temp-location", "Temporary File Location",
+ "Location of a temporary file to store data in",
+ NULL, G_PARAM_READWRITE));
+
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&srctemplate));
+ gst_element_class_add_pad_template (gstelement_class,
+ gst_static_pad_template_get (&sinktemplate));
+
+ gst_element_class_set_details (gstelement_class, &gst_queue_details);
+
+ /* set several parent class virtual functions */
+ gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_queue_finalize);
+
+ gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_queue_change_state);
+}
+
+static void
+gst_queue_init (GstQueue * queue, GstQueueClass * g_class)
+{
+ queue->sinkpad = gst_pad_new_from_static_template (&sinktemplate, "sink");
+
+ gst_pad_set_chain_function (queue->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_queue_chain));
+ gst_pad_set_activatepush_function (queue->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_queue_sink_activate_push));
+ gst_pad_set_event_function (queue->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_queue_handle_sink_event));
+ gst_pad_set_getcaps_function (queue->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_queue_getcaps));
+ gst_pad_set_bufferalloc_function (queue->sinkpad,
+ GST_DEBUG_FUNCPTR (gst_queue_bufferalloc));
+ gst_element_add_pad (GST_ELEMENT (queue), queue->sinkpad);
+
+ queue->srcpad = gst_pad_new_from_static_template (&srctemplate, "src");
+
+ gst_pad_set_activatepull_function (queue->srcpad,
+ GST_DEBUG_FUNCPTR (gst_queue_src_activate_pull));
+ gst_pad_set_activatepush_function (queue->srcpad,
+ GST_DEBUG_FUNCPTR (gst_queue_src_activate_push));
+ gst_pad_set_getrange_function (queue->srcpad,
+ GST_DEBUG_FUNCPTR (gst_queue_get_range));
+ gst_pad_set_checkgetrange_function (queue->srcpad,
+ GST_DEBUG_FUNCPTR (gst_queue_src_checkgetrange_function));
+ gst_pad_set_getcaps_function (queue->srcpad,
+ GST_DEBUG_FUNCPTR (gst_queue_getcaps));
+ gst_pad_set_event_function (queue->srcpad,
+ GST_DEBUG_FUNCPTR (gst_queue_handle_src_event));
+ gst_pad_set_query_function (queue->srcpad,
+ GST_DEBUG_FUNCPTR (gst_queue_handle_src_query));
+ gst_element_add_pad (GST_ELEMENT (queue), queue->srcpad);
+
+ /* levels */
+ GST_QUEUE_CLEAR_LEVEL (queue->cur_level);
+ queue->max_level.buffers = DEFAULT_MAX_SIZE_BUFFERS;
+ queue->max_level.bytes = DEFAULT_MAX_SIZE_BYTES;
+ queue->max_level.time = DEFAULT_MAX_SIZE_TIME;
+ queue->max_level.rate_time = DEFAULT_MAX_SIZE_TIME;
+ queue->use_buffering = DEFAULT_USE_BUFFERING;
+ queue->use_rate_estimate = DEFAULT_USE_RATE_ESTIMATE;
+ queue->low_percent = DEFAULT_LOW_PERCENT;
+ queue->high_percent = DEFAULT_HIGH_PERCENT;
+
+ gst_segment_init (&queue->sink_segment, GST_FORMAT_TIME);
+ gst_segment_init (&queue->src_segment, GST_FORMAT_TIME);
+
+ queue->srcresult = GST_FLOW_WRONG_STATE;
+ queue->is_eos = FALSE;
+ queue->in_timer = g_timer_new ();
+ queue->out_timer = g_timer_new ();
+
+ queue->qlock = g_mutex_new ();
+ queue->waiting_add = FALSE;
+ queue->item_add = g_cond_new ();
+ queue->waiting_del = FALSE;
+ queue->item_del = g_cond_new ();
+ queue->queue = g_queue_new ();
+
+ /* tempfile related */
+ queue->temp_location = NULL;
+ queue->temp_file = NULL;
+
+ 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)
+{
+ GstQueue *queue = GST_QUEUE (object);
+
+ GST_DEBUG_OBJECT (queue, "finalizing queue");
+
+ while (!g_queue_is_empty (queue->queue)) {
+ GstMiniObject *data = g_queue_pop_head (queue->queue);
+
+ gst_mini_object_unref (data);
+ }
+
+ g_queue_free (queue->queue);
+ g_mutex_free (queue->qlock);
+ g_cond_free (queue->item_add);
+ g_cond_free (queue->item_del);
+ g_timer_destroy (queue->in_timer);
+ g_timer_destroy (queue->out_timer);
+
+ /* temp_file path cleanup */
+ if (queue->temp_location != NULL)
+ g_free (queue->temp_location);
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static GstCaps *
+gst_queue_getcaps (GstPad * pad)
+{
+ GstQueue *queue;
+ GstPad *otherpad;
+ GstCaps *result;
+
+ queue = GST_QUEUE (GST_PAD_PARENT (pad));
+
+ otherpad = (pad == queue->srcpad ? queue->sinkpad : queue->srcpad);
+ result = gst_pad_peer_get_caps (otherpad);
+ if (result == NULL)
+ result = gst_caps_new_any ();
+
+ return result;
+}
+
+static GstFlowReturn
+gst_queue_bufferalloc (GstPad * pad, guint64 offset, guint size, GstCaps * caps,
+ GstBuffer ** buf)
+{
+ GstQueue *queue;
+ GstFlowReturn result;
+
+ queue = GST_QUEUE (GST_PAD_PARENT (pad));
+
+ /* Forward to src pad, without setting caps on the src pad */
+ result = gst_pad_alloc_buffer (queue->srcpad, offset, size, caps, buf);
+
+ return result;
+}
+
+/* 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;
+
+ sink_time =
+ gst_segment_to_running_time (&queue->sink_segment, GST_FORMAT_TIME,
+ queue->sink_segment.last_stop);
+
+ src_time = gst_segment_to_running_time (&queue->src_segment, GST_FORMAT_TIME,
+ queue->src_segment.last_stop);
+
+ GST_DEBUG_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 NEWSEGMENT event and apply the values to segment, updating the time
+ * level of queue. */
+static void
+apply_segment (GstQueue * queue, GstEvent * event, GstSegment * segment)
+{
+ gboolean update;
+ GstFormat format;
+ gdouble rate, arate;
+ gint64 start, stop, time;
+
+ gst_event_parse_new_segment_full (event, &update, &rate, &arate,
+ &format, &start, &stop, &time);
+
+ GST_DEBUG_OBJECT (queue,
+ "received NEWSEGMENT update %d, rate %lf, applied rate %lf, "
+ "format %d, "
+ "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
+ G_GINT64_FORMAT, update, rate, arate, format, start, stop, time);
+
+ if (format == GST_FORMAT_BYTES) {
+ }
+
+ /* now configure the values, we use these to track timestamps on the
+ * sinkpad. */
+ if (format != GST_FORMAT_TIME) {
+ /* non-time format, pretent the current time segment is closed with a
+ * 0 start and unknown stop time. */
+ update = FALSE;
+ format = GST_FORMAT_TIME;
+ start = 0;
+ stop = -1;
+ time = 0;
+ }
+ gst_segment_set_newsegment_full (segment, update,
+ rate, arate, format, start, stop, time);
+
+ GST_DEBUG_OBJECT (queue,
+ "configured NEWSEGMENT %" 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)
+{
+ 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->last_stop;
+
+ /* add duration */
+ if (duration != GST_CLOCK_TIME_NONE)
+ timestamp += duration;
+
+ GST_DEBUG_OBJECT (queue, "last_stop updated to %" GST_TIME_FORMAT,
+ GST_TIME_ARGS (timestamp));
+
+ gst_segment_set_last_stop (segment, GST_FORMAT_TIME, timestamp);
+
+ /* calc diff with other end */
+ update_time_level (queue);
+}
+
+static void
+update_buffering (GstQueue * queue)
+{
+ gint percent;
+ gboolean post = FALSE;
+
+ if (!queue->use_buffering || queue->high_percent <= 0)
+ return;
+
+#define GET_PERCENT(format) ((queue->max_level.format) > 0 ? \
+ (queue->cur_level.format) * 100 / (queue->max_level.format) : 0)
+
+ if (queue->is_eos) {
+ /* on EOS we are always 100% full, we set the var here so that it we can
+ * resue the logic below to stop buffering */
+ percent = 100;
+ } else {
+ /* figure out the percent we are filled, we take the max of all formats. */
+ percent = GET_PERCENT (bytes);
+ percent = MAX (percent, GET_PERCENT (time));
+ percent = MAX (percent, GET_PERCENT (buffers));
+
+ /* also apply the rate estimate when we need to */
+ if (queue->use_rate_estimate)
+ percent = MAX (percent, GET_PERCENT (rate_time));
+ }
+
+ if (queue->is_buffering) {
+ post = TRUE;
+ /* if we were buffering see if we reached the high watermark */
+ if (percent >= queue->high_percent)
+ queue->is_buffering = FALSE;
+ } else {
+ /* we were not buffering, check if we need to start buffering if we drop
+ * below the low threshold */
+ if (percent < queue->low_percent) {
+ queue->is_buffering = TRUE;
+ queue->buffering_iteration++;
+ post = TRUE;
+ }
+ }
+ if (post) {
+ /* scale to high percent so that it becomes the 100% mark */
+ percent = percent * 100 / queue->high_percent;
+ /* clip */
+ if (percent > 100)
+ percent = 100;
+
+ GST_DEBUG_OBJECT (queue, "buffering %d percent", percent);
+ gst_element_post_message (GST_ELEMENT_CAST (queue),
+ gst_message_new_buffering (GST_OBJECT_CAST (queue), percent));
+ } else {
+ GST_DEBUG_OBJECT (queue, "filled %d percent", percent);
+ }
+
+#undef GET_PERCENT
+}
+
+static void
+reset_rate_timer (GstQueue * queue)
+{
+ queue->bytes_in = 0;
+ queue->bytes_out = 0;
+ queue->byte_in_rate = 0.0;
+ queue->byte_out_rate = 0.0;
+ queue->last_in_elapsed = 0.0;
+ queue->last_out_elapsed = 0.0;
+ queue->in_timer_started = FALSE;
+ queue->out_timer_started = FALSE;
+}
+
+/* the interval in seconds to recalculate the rate */
+#define RATE_INTERVAL 0.2
+/* Tuning for rate estimation. We use a large window for the input rate because
+ * it should be stable when connected to a network. The output rate is less
+ * stable (the elements preroll, queues behind a demuxer fill, ...) and should
+ * therefore adapt more quickly. */
+#define AVG_IN(avg,val) ((avg) * 15.0 + (val)) / 16.0
+#define AVG_OUT(avg,val) ((avg) * 3.0 + (val)) / 4.0
+
+static void
+update_in_rates (GstQueue * queue)
+{
+ gdouble elapsed, period;
+ gdouble byte_in_rate;
+
+ if (!queue->in_timer_started) {
+ queue->in_timer_started = TRUE;
+ g_timer_start (queue->in_timer);
+ return;
+ }
+
+ elapsed = g_timer_elapsed (queue->in_timer, NULL);
+
+ /* recalc after each interval. */
+ if (queue->last_in_elapsed + RATE_INTERVAL < elapsed) {
+ period = elapsed - queue->last_in_elapsed;
+
+ GST_DEBUG_OBJECT (queue,
+ "rates: period %f, in %" G_GUINT64_FORMAT, period, queue->bytes_in);
+
+ byte_in_rate = queue->bytes_in / period;
+
+ if (queue->byte_in_rate == 0.0)
+ queue->byte_in_rate = byte_in_rate;
+ else
+ queue->byte_in_rate = AVG_IN (queue->byte_in_rate, byte_in_rate);
+
+ /* reset the values to calculate rate over the next interval */
+ queue->last_in_elapsed = elapsed;
+ queue->bytes_in = 0;
+ }
+
+ if (queue->byte_in_rate > 0.0) {
+ queue->cur_level.rate_time =
+ queue->cur_level.bytes / queue->byte_in_rate * GST_SECOND;
+ }
+ GST_DEBUG_OBJECT (queue, "rates: in %f, time %" GST_TIME_FORMAT,
+ queue->byte_in_rate, GST_TIME_ARGS (queue->cur_level.rate_time));
+}
+
+static void
+update_out_rates (GstQueue * queue)
+{
+ gdouble elapsed, period;
+ gdouble byte_out_rate;
+
+ if (!queue->out_timer_started) {
+ queue->out_timer_started = TRUE;
+ g_timer_start (queue->out_timer);
+ return;
+ }
+
+ elapsed = g_timer_elapsed (queue->out_timer, NULL);
+
+ /* recalc after each interval. */
+ if (queue->last_out_elapsed + RATE_INTERVAL < elapsed) {
+ period = elapsed - queue->last_out_elapsed;
+
+ GST_DEBUG_OBJECT (queue,
+ "rates: period %f, out %" G_GUINT64_FORMAT, period, queue->bytes_out);
+
+ byte_out_rate = queue->bytes_out / period;
+
+ if (queue->byte_out_rate == 0.0)
+ queue->byte_out_rate = byte_out_rate;
+ else
+ queue->byte_out_rate = AVG_OUT (queue->byte_out_rate, byte_out_rate);
+
+ /* reset the values to calculate rate over the next interval */
+ queue->last_out_elapsed = elapsed;
+ queue->bytes_out = 0;
+ }
+ GST_DEBUG_OBJECT (queue, "rates: out %f, time %" GST_TIME_FORMAT,
+ queue->byte_out_rate, GST_TIME_ARGS (queue->cur_level.rate_time));
+}
+
+static void
+gst_queue_write_buffer_to_file (GstQueue * queue, GstBuffer * buffer)
+{
+ guint size;
+ guint8 *data;
+ int ret;
+
+ fseek (queue->temp_file, queue->writing_pos, SEEK_SET);
+
+ data = GST_BUFFER_DATA (buffer);
+ size = GST_BUFFER_SIZE (buffer);
+
+ ret = fwrite (data, 1, size, queue->temp_file);
+ if (ret < size) {
+ /* FIXME do something useful here */
+ GST_ERROR_OBJECT (queue, "fwrite returned error");
+ }
+ queue->writing_pos += size;
+}
+
+/* see if there is enough data in the file to read a full buffer */
+static gboolean
+gst_queue_have_data (GstQueue * queue, guint64 offset, guint length)
+{
+ GST_DEBUG_OBJECT (queue,
+ "offset %" G_GUINT64_FORMAT ", len %u, write %" G_GUINT64_FORMAT, offset,
+ length, queue->writing_pos);
+ if (queue->is_eos)
+ return TRUE;
+
+ if (offset + length < queue->writing_pos)
+ return TRUE;
+
+ return FALSE;
+}
+
+static GstFlowReturn
+gst_queue_create_read (GstQueue * queue, guint64 offset, guint length,
+ GstBuffer ** buffer)
+{
+ size_t res;
+ GstBuffer *buf;
+
+ /* check if we have enough data at @offset. If there is not enough data, we
+ * block and wait. */
+ while (!gst_queue_have_data (queue, offset, length)) {
+ GST_QUEUE_WAIT_ADD_CHECK (queue, out_flushing);
+ }
+
+#ifdef HAVE_FSEEKO
+ if (fseeko (queue->temp_file, (off_t) offset, SEEK_SET) != 0)
+ goto seek_failed;
+#elif defined (G_OS_UNIX)
+ if (lseek (fileno (queue->temp_file), (off_t) offset,
+ SEEK_SET) == (off_t) - 1)
+ goto seek_failed;
+#else
+ if (fseek (queue->temp_file, (long) offset, SEEK_SET) != 0)
+ goto seek_failed;
+#endif
+
+ buf = gst_buffer_new_and_alloc (length);
+
+ /* this should not block */
+ GST_LOG_OBJECT (queue, "Reading %d bytes", length);
+ res = fread (GST_BUFFER_DATA (buf), 1, length, queue->temp_file);
+ GST_LOG_OBJECT (queue, "read %" G_GSIZE_FORMAT " bytes", res);
+
+ if (G_UNLIKELY (res == 0)) {
+ /* check for errors or EOF */
+ if (ferror (queue->temp_file))
+ goto could_not_read;
+ if (feof (queue->temp_file) && length > 0)
+ goto eos;
+ }
+
+ length = res;
+
+ GST_BUFFER_SIZE (buf) = length;
+ GST_BUFFER_OFFSET (buf) = offset;
+ GST_BUFFER_OFFSET_END (buf) = offset + length;
+
+ *buffer = buf;
+
+ queue->reading_pos = offset + length;
+
+ return GST_FLOW_OK;
+
+ /* ERRORS */
+out_flushing:
+ {
+ GST_DEBUG_OBJECT (queue, "we are flushing");
+ return GST_FLOW_WRONG_STATE;
+ }
+seek_failed:
+ {
+ GST_ELEMENT_ERROR (queue, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
+ return GST_FLOW_ERROR;
+ }
+could_not_read:
+ {
+ GST_ELEMENT_ERROR (queue, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
+ gst_buffer_unref (buf);
+ return GST_FLOW_ERROR;
+ }
+eos:
+ {
+ GST_DEBUG ("non-regular file hits EOS");
+ gst_buffer_unref (buf);
+ return GST_FLOW_UNEXPECTED;
+ }
+}
+
+/* should be called with QUEUE_LOCK */
+static GstMiniObject *
+gst_queue_read_item_from_file (GstQueue * queue)
+{
+ GstMiniObject *item;
+
+ if (queue->starting_segment != NULL) {
+ item = GST_MINI_OBJECT_CAST (queue->starting_segment);
+ queue->starting_segment = NULL;
+ } else {
+ GstFlowReturn ret;
+ GstBuffer *buffer;
+
+ ret =
+ gst_queue_create_read (queue, queue->reading_pos, DEFAULT_BUFFER_SIZE,
+ &buffer);
+ switch (ret) {
+ case GST_FLOW_OK:
+ item = GST_MINI_OBJECT_CAST (buffer);
+ break;
+ case GST_FLOW_UNEXPECTED:
+ item = GST_MINI_OBJECT_CAST (gst_event_new_eos ());
+ break;
+ default:
+ item = NULL;
+ break;
+ }
+ }
+ return item;
+}
+
+static gboolean
+gst_queue_open_temp_location_file (GstQueue * queue)
+{
+ /* nothing to do */
+ if (queue->temp_location == NULL)
+ goto no_filename;
+
+ /* open the file for update/writing */
+ queue->temp_file = g_fopen (queue->temp_location, "wb+");
+ /* error creating file */
+ if (queue->temp_file == NULL)
+ goto open_failed;
+
+ queue->writing_pos = 0;
+ queue->reading_pos = 0;
+
+ return TRUE;
+
+ /* ERRORS */
+no_filename:
+ {
+ GST_ELEMENT_ERROR (queue, RESOURCE, NOT_FOUND,
+ (_("No file name specified.")), (NULL));
+ return FALSE;
+ }
+open_failed:
+ {
+ GST_ELEMENT_ERROR (queue, RESOURCE, OPEN_READ,
+ (_("Could not open file \"%s\" for reading."), queue->temp_location),
+ GST_ERROR_SYSTEM);
+ return FALSE;
+ }
+}
+
+static void
+gst_queue_close_temp_location_file (GstQueue * queue)
+{
+ /* nothing to do */
+ if (queue->temp_file == NULL)
+ return;
+
+ /* we don't remove the file so that the application can use it as a cache
+ * later on */
+ fflush (queue->temp_file);
+ fclose (queue->temp_file);
+ remove (queue->temp_location);
+ queue->temp_file = NULL;
+}
+
+static void
+gst_queue_locked_flush (GstQueue * queue)
+{
+ if (QUEUE_IS_USING_TEMP_FILE (queue)) {
+ gst_queue_close_temp_location_file (queue);
+ gst_queue_open_temp_location_file (queue);
+ } else {
+ while (!g_queue_is_empty (queue->queue)) {
+ GstMiniObject *data = g_queue_pop_head (queue->queue);
+
+ /* Then lose another reference because we are supposed to destroy that
+ data when flushing */
+ gst_mini_object_unref (data);
+ }
+ }
+ GST_QUEUE_CLEAR_LEVEL (queue->cur_level);
+ gst_segment_init (&queue->sink_segment, GST_FORMAT_TIME);
+ gst_segment_init (&queue->src_segment, GST_FORMAT_TIME);
+ if (queue->starting_segment != NULL)
+ gst_event_unref (queue->starting_segment);
+ queue->starting_segment = NULL;
+ queue->segment_event_received = FALSE;
+
+ /* we deleted a lot of something */
+ GST_QUEUE_SIGNAL_DEL (queue);
+}
+
+/* enqueue an item an update the level stats */
+static void
+gst_queue_locked_enqueue (GstQueue * queue, gpointer item)
+{
+ if (GST_IS_BUFFER (item)) {
+ GstBuffer *buffer;
+ guint size;
+
+ buffer = GST_BUFFER_CAST (item);
+ size = GST_BUFFER_SIZE (buffer);
+
+ /* add buffer to the statistics */
+ queue->cur_level.buffers++;
+ queue->cur_level.bytes += size;
+ queue->bytes_in += size;
+ /* apply new buffer to segment stats */
+ apply_buffer (queue, buffer, &queue->sink_segment);
+ /* update the byterate stats */
+ update_in_rates (queue);
+
+ if (QUEUE_IS_USING_TEMP_FILE (queue)) {
+ gst_queue_write_buffer_to_file (queue, buffer);
+ }
+
+ } else if (GST_IS_EVENT (item)) {
+ GstEvent *event;
+
+ 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. */
+ queue->is_eos = TRUE;
+ break;
+ case GST_EVENT_NEWSEGMENT:
+ apply_segment (queue, event, &queue->sink_segment);
+ /* This is our first new segment, we hold it
+ * as we can't save it on the temp file */
+ if (QUEUE_IS_USING_TEMP_FILE (queue)) {
+ if (queue->segment_event_received)
+ goto unexpected_event;
+
+ queue->segment_event_received = TRUE;
+ queue->starting_segment = event;
+ }
+ /* a new segment allows us to accept more buffers if we got UNEXPECTED
+ * from downstream */
+ queue->unexpected = FALSE;
+ break;
+ default:
+ if (QUEUE_IS_USING_TEMP_FILE (queue))
+ goto unexpected_event;
+ break;
+ }
+ } else {
+ g_warning ("Unexpected item %p added in queue %s (refcounting problem?)",
+ item, GST_OBJECT_NAME (queue));
+ /* we can't really unref since we don't know what it is */
+ item = NULL;
+ }
+
+ if (item) {
+ /* update the buffering status */
+ update_buffering (queue);
+
+ if (!QUEUE_IS_USING_TEMP_FILE (queue))
+ g_queue_push_tail (queue->queue, item);
+ GST_QUEUE_SIGNAL_ADD (queue);
+ }
+
+ return;
+
+ /* ERRORS */
+unexpected_event:
+ {
+ g_warning
+ ("Unexpected event of kind %s can't be added in temp file of queue %s ",
+ gst_event_type_get_name (GST_EVENT_TYPE (item)),
+ GST_OBJECT_NAME (queue));
+ gst_event_unref (GST_EVENT_CAST (item));
+ return;
+ }
+}
+
+/* dequeue an item from the queue and update level stats */
+static GstMiniObject *
+gst_queue_locked_dequeue (GstQueue * queue)
+{
+ GstMiniObject *item;
+
+ if (QUEUE_IS_USING_TEMP_FILE (queue))
+ item = gst_queue_read_item_from_file (queue);
+ else
+ item = g_queue_pop_head (queue->queue);
+
+ if (item == NULL)
+ goto no_item;
+
+ if (GST_IS_BUFFER (item)) {
+ GstBuffer *buffer;
+ guint size;
+
+ buffer = GST_BUFFER_CAST (item);
+ size = GST_BUFFER_SIZE (buffer);
+
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue,
+ "retrieved buffer %p from queue", buffer);
+
+ queue->cur_level.buffers--;
+ queue->cur_level.bytes -= size;
+ queue->bytes_out += size;
+ apply_buffer (queue, buffer, &queue->src_segment);
+ /* update the byterate stats */
+ update_out_rates (queue);
+ /* update the buffering */
+ update_buffering (queue);
+
+ } 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_NEWSEGMENT:
+ apply_segment (queue, event, &queue->src_segment);
+ break;
+ default:
+ break;
+ }
+ } 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_LOG_OBJECT (queue_dataflow, queue, "the queue is empty");
+ return NULL;
+ }
+}
+
+static gboolean
+gst_queue_handle_sink_event (GstPad * pad, GstEvent * event)
+{
+ GstQueue *queue;
+
+ queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_FLUSH_START:
+ {
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue, "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_WRONG_STATE;
+ /* unblock the loop and chain functions */
+ g_cond_signal (queue->item_add);
+ g_cond_signal (queue->item_del);
+ 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:
+ {
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue, "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->is_eos = FALSE;
+ queue->unexpected = FALSE;
+ /* reset rate counters */
+ reset_rate_timer (queue);
+ gst_pad_start_task (queue->srcpad, (GstTaskFunction) gst_queue_loop,
+ queue->srcpad);
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ 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->is_eos)
+ goto out_eos;
+ gst_queue_locked_enqueue (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_DEBUG_OBJECT (queue, "refusing event, we are flushing");
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ gst_event_unref (event);
+ return FALSE;
+ }
+out_eos:
+ {
+ GST_DEBUG_OBJECT (queue, "refusing event, we are EOS");
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ gst_event_unref (event);
+ return FALSE;
+ }
+}
+
+static gboolean
+gst_queue_is_empty (GstQueue * queue)
+{
+ /* never empty on EOS */
+ if (queue->is_eos)
+ return FALSE;
+
+ if (QUEUE_IS_USING_TEMP_FILE (queue)) {
+ return queue->writing_pos == queue->reading_pos;
+ } else {
+ if (queue->queue->length == 0)
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static gboolean
+gst_queue_is_filled (GstQueue * queue)
+{
+ gboolean res;
+
+ /* always filled on EOS */
+ if (queue->is_eos)
+ return TRUE;
+
+ /* if using file, we're never filled if we don't have EOS */
+ if (QUEUE_IS_USING_TEMP_FILE (queue))
+ return FALSE;
+
+#define CHECK_FILLED(format) ((queue->max_level.format) > 0 && \
+ (queue->cur_level.format) >= (queue->max_level.format))
+
+ /* we are filled if one of the current levels exceeds the max */
+ res = CHECK_FILLED (buffers) || CHECK_FILLED (bytes) || CHECK_FILLED (time);
+
+ /* if we need to, use the rate estimate to check against the max time we are
+ * allowed to queue */
+ if (queue->use_rate_estimate)
+ res |= CHECK_FILLED (rate_time);
+
+#undef CHECK_FILLED
+ return res;
+}
+
+static GstFlowReturn
+gst_queue_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstQueue *queue;
+
+ queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
+
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue,
+ "received buffer %p of size %d, time %" GST_TIME_FORMAT ", duration %"
+ GST_TIME_FORMAT, buffer, GST_BUFFER_SIZE (buffer),
+ GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)),
+ GST_TIME_ARGS (GST_BUFFER_DURATION (buffer)));
+
+ /* we have to lock the queue since we span threads */
+ GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
+ /* when we received EOS, we refuse more data */
+ if (queue->is_eos)
+ goto out_eos;
+ /* when we received unexpected from downstream, refuse more buffers */
+ if (queue->unexpected)
+ goto out_unexpected;
+
+ /* We make space available if we're "full" according to whatever
+ * the user defined as "full". */
+ if (gst_queue_is_filled (queue)) {
+ gboolean started;
+
+ /* pause the timer while we wait. The fact that we are waiting does not mean
+ * the byterate on the input pad is lower */
+ if ((started = queue->in_timer_started))
+ g_timer_stop (queue->in_timer);
+
+ GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
+ "queue is full, waiting for free space");
+ do {
+ /* Wait for space to be available, we could be unlocked because of a flush. */
+ GST_QUEUE_WAIT_DEL_CHECK (queue, out_flushing);
+ }
+ while (gst_queue_is_filled (queue));
+
+ /* and continue if we were running before */
+ if (started)
+ g_timer_continue (queue->in_timer);
+ }
+
+ /* put buffer in queue now */
+ gst_queue_locked_enqueue (queue, buffer);
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+
+ return GST_FLOW_OK;
+
+ /* special conditions */
+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_UNEXPECTED;
+ }
+out_unexpected:
+ {
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue,
+ "exit because we received UNEXPECTED");
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ gst_buffer_unref (buffer);
+
+ return GST_FLOW_UNEXPECTED;
+ }
+}
+
+/* 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;
+ GstCaps *caps;
+
+ buffer = GST_BUFFER_CAST (data);
+ caps = GST_BUFFER_CAPS (buffer);
+
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+
+ /* set caps before pushing the buffer so that core does not try to do
+ * something fancy to check if this is possible. */
+ if (caps && caps != GST_PAD_CAPS (queue->srcpad))
+ gst_pad_set_caps (queue->srcpad, caps);
+
+ 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_UNEXPECTED) {
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue,
+ "got UNEXPECTED from downstream");
+ /* stop pushing buffers, we dequeue all items until we see an item that we
+ * can push again, which is EOS or NEWSEGMENT. If there is nothing in the
+ * queue we can push, we set a flag to make the sinkpad refuse more
+ * buffers with an UNEXPECTED return value until we receive something
+ * pushable again or we get flushed. */
+ while ((data = gst_queue_locked_dequeue (queue))) {
+ if (GST_IS_BUFFER (data)) {
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue,
+ "dropping UNEXPECTED 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_NEWSEGMENT) {
+ /* we found a pushable item in the queue, push it out */
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue,
+ "pushing pushable event %s after UNEXPECTED",
+ GST_EVENT_TYPE_NAME (event));
+ goto next;
+ }
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue,
+ "dropping UNEXPECTED event %p", event);
+ gst_event_unref (event);
+ }
+ }
+ /* 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 NEWSEGMENT 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 UNEXPECTED so that the task pauses. */
+ if (type == GST_EVENT_EOS) {
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue,
+ "pushed EOS event %p, return UNEXPECTED", event);
+ result = GST_FLOW_UNEXPECTED;
+ }
+ }
+ 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_WRONG_STATE;
+ }
+}
+
+/* called repeadedly with @pad as the source pad. This function should push out
+ * data to the peer element. */
+static void
+gst_queue_loop (GstPad * pad)
+{
+ GstQueue *queue;
+ GstFlowReturn ret;
+
+ queue = GST_QUEUE (GST_PAD_PARENT (pad));
+
+ /* have to lock for thread-safety */
+ GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
+
+ if (gst_queue_is_empty (queue)) {
+ gboolean started;
+
+ /* pause the timer while we wait. The fact that we are waiting does not mean
+ * the byterate on the output pad is lower */
+ if ((started = queue->out_timer_started))
+ g_timer_stop (queue->out_timer);
+
+ GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
+ "queue is empty, waiting for new data");
+ do {
+ /* Wait for data to be available, we could be unlocked because of a flush. */
+ GST_QUEUE_WAIT_ADD_CHECK (queue, out_flushing);
+ }
+ while (gst_queue_is_empty (queue));
+
+ /* and continue if we were running before */
+ if (started)
+ g_timer_continue (queue->out_timer);
+ }
+ 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:
+ {
+ gst_pad_pause_task (queue->srcpad);
+ GST_CAT_LOG_OBJECT (queue_dataflow, queue,
+ "pause task, reason: %s", gst_flow_get_name (queue->srcresult));
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ return;
+ }
+}
+
+static gboolean
+gst_queue_handle_src_event (GstPad * pad, GstEvent * event)
+{
+ gboolean res = TRUE;
+ GstQueue *queue = GST_QUEUE (GST_PAD_PARENT (pad));
+
+#ifndef GST_DISABLE_GST_DEBUG
+ GST_CAT_DEBUG_OBJECT (queue_dataflow, queue, "got event %p (%s)",
+ event, GST_EVENT_TYPE_NAME (event));
+#endif
+
+ /* just forward upstream */
+ res = gst_pad_push_event (queue->sinkpad, event);
+
+ return res;
+}
+
+static gboolean
+gst_queue_peer_query (GstQueue * queue, GstPad * pad, GstQuery * query)
+{
+ gboolean ret = FALSE;
+ GstPad *peer;
+
+ if ((peer = gst_pad_get_peer (pad))) {
+ ret = gst_pad_query (peer, query);
+ gst_object_unref (peer);
+ }
+ return ret;
+}
+
+static gboolean
+gst_queue_handle_src_query (GstPad * pad, GstQuery * query)
+{
+ GstQueue *queue;
+
+ queue = GST_QUEUE (GST_PAD_PARENT (pad));
+
+ switch (GST_QUERY_TYPE (query)) {
+ case GST_QUERY_POSITION:
+ {
+ gint64 peer_pos;
+ GstFormat format;
+
+ if (!gst_queue_peer_query (queue, queue->sinkpad, query))
+ goto peer_failed;
+
+ /* 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_WARNING_OBJECT (queue, "dropping query in %s format, don't "
+ "know how to adjust value", gst_format_get_name (format));
+ return FALSE;
+ }
+ /* set updated position */
+ gst_query_set_position (query, format, peer_pos);
+ break;
+ }
+ case GST_QUERY_DURATION:
+ {
+ GST_DEBUG_OBJECT (queue, "waiting for preroll in duration query");
+
+ GST_QUEUE_MUTEX_LOCK (queue);
+ /* we have to wait until the upstream element is at least paused, which
+ * happened when we received a first item. */
+ while (gst_queue_is_empty (queue)) {
+ GST_QUEUE_WAIT_ADD_CHECK (queue, flushing);
+ }
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+
+ if (!gst_queue_peer_query (queue, queue->sinkpad, query))
+ goto peer_failed;
+
+ GST_DEBUG_OBJECT (queue, "peer query success");
+ break;
+ }
+ default:
+ /* peer handled other queries */
+ if (!gst_queue_peer_query (queue, queue->sinkpad, query))
+ goto peer_failed;
+ break;
+ }
+
+ return TRUE;
+
+ /* ERRORS */
+peer_failed:
+ {
+ GST_DEBUG_OBJECT (queue, "failed peer query");
+ return FALSE;
+ }
+flushing:
+ {
+ GST_DEBUG_OBJECT (queue, "flushing while waiting for query");
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ return FALSE;
+ }
+}
+
+static GstFlowReturn
+gst_queue_get_range (GstPad * pad, guint64 offset, guint length,
+ GstBuffer ** buffer)
+{
+ GstQueue *queue;
+ GstFlowReturn ret;
+
+ queue = GST_QUEUE_CAST (gst_pad_get_parent (pad));
+
+ GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
+ length = (length == -1) ? DEFAULT_BUFFER_SIZE : length;
+ offset = (offset == -1) ? queue->reading_pos : offset;
+
+ /* function will block when the range is not yet available */
+ ret = gst_queue_create_read (queue, offset, length, buffer);
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+
+ gst_object_unref (queue);
+
+ return ret;
+
+ /* ERRORS */
+out_flushing:
+ {
+ GST_DEBUG_OBJECT (queue, "we are flushing");
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ return GST_FLOW_WRONG_STATE;
+ }
+}
+
+static gboolean
+gst_queue_src_checkgetrange_function (GstPad * pad)
+{
+ GstQueue *queue;
+ gboolean ret;
+
+ queue = GST_QUEUE (gst_pad_get_parent (pad));
+ /* we can operate in pull mode when we are using a tempfile */
+ ret = QUEUE_IS_USING_TEMP_FILE (queue);
+ gst_object_unref (GST_OBJECT (queue));
+
+ return ret;
+}
+
+/* sink currently only operates in push mode */
+static gboolean
+gst_queue_sink_activate_push (GstPad * pad, gboolean active)
+{
+ gboolean result = TRUE;
+ GstQueue *queue;
+
+ queue = GST_QUEUE (gst_pad_get_parent (pad));
+
+ if (active) {
+ GST_QUEUE_MUTEX_LOCK (queue);
+ GST_DEBUG_OBJECT (queue, "activating push mode");
+ queue->srcresult = GST_FLOW_OK;
+ queue->is_eos = FALSE;
+ queue->unexpected = FALSE;
+ reset_rate_timer (queue);
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ } else {
+ /* unblock chain function */
+ GST_QUEUE_MUTEX_LOCK (queue);
+ GST_DEBUG_OBJECT (queue, "deactivating push mode");
+ queue->srcresult = GST_FLOW_WRONG_STATE;
+ gst_queue_locked_flush (queue);
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ }
+
+ gst_object_unref (queue);
+
+ return result;
+}
+
+/* src operating in push mode, we start a task on the source pad that pushes out
+ * buffers from the queue */
+static gboolean
+gst_queue_src_activate_push (GstPad * pad, gboolean active)
+{
+ gboolean result = FALSE;
+ GstQueue *queue;
+
+ queue = GST_QUEUE (gst_pad_get_parent (pad));
+
+ if (active) {
+ GST_QUEUE_MUTEX_LOCK (queue);
+ GST_DEBUG_OBJECT (queue, "activating push mode");
+ queue->srcresult = GST_FLOW_OK;
+ queue->is_eos = FALSE;
+ queue->unexpected = FALSE;
+ result = gst_pad_start_task (pad, (GstTaskFunction) gst_queue_loop, pad);
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ } else {
+ /* unblock loop function */
+ GST_QUEUE_MUTEX_LOCK (queue);
+ GST_DEBUG_OBJECT (queue, "deactivating push mode");
+ queue->srcresult = GST_FLOW_WRONG_STATE;
+ /* 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);
+ }
+
+ gst_object_unref (queue);
+
+ return result;
+}
+
+/* pull mode, downstream will call our getrange function */
+static gboolean
+gst_queue_src_activate_pull (GstPad * pad, gboolean active)
+{
+ gboolean result;
+ GstQueue *queue;
+
+ queue = GST_QUEUE (gst_pad_get_parent (pad));
+
+ if (active) {
+ if (QUEUE_IS_USING_TEMP_FILE (queue)) {
+ GST_QUEUE_MUTEX_LOCK (queue);
+ GST_DEBUG_OBJECT (queue, "activating pull mode");
+ queue->srcresult = GST_FLOW_OK;
+ queue->is_eos = FALSE;
+ queue->unexpected = FALSE;
+ result = TRUE;
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ } else {
+ GST_QUEUE_MUTEX_LOCK (queue);
+ GST_DEBUG_OBJECT (queue, "no temp file, cannot activate pull mode");
+ /* this is not allowed, we cannot operate in pull mode without a temp
+ * file. */
+ queue->srcresult = GST_FLOW_WRONG_STATE;
+ result = FALSE;
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ }
+ } else {
+ GST_QUEUE_MUTEX_LOCK (queue);
+ GST_DEBUG_OBJECT (queue, "deactivating pull mode");
+ queue->srcresult = GST_FLOW_WRONG_STATE;
+ /* this will unlock getrange */
+ g_cond_signal (queue->item_add);
+ result = TRUE;
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+ }
+ gst_object_unref (queue);
+
+ return result;
+}
+
+static GstStateChangeReturn
+gst_queue_change_state (GstElement * element, GstStateChange transition)
+{
+ GstQueue *queue;
+ GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
+
+ queue = GST_QUEUE (element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_NULL_TO_READY:
+ break;
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ if (QUEUE_IS_USING_TEMP_FILE (queue)) {
+ if (!gst_queue_open_temp_location_file (queue))
+ ret = GST_STATE_CHANGE_FAILURE;
+ }
+ queue->segment_event_received = FALSE;
+ queue->starting_segment = NULL;
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
+ break;
+ default:
+ break;
+ }
+
+ ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
+ break;
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ if (QUEUE_IS_USING_TEMP_FILE (queue))
+ gst_queue_close_temp_location_file (queue);
+ if (queue->starting_segment != NULL) {
+ gst_event_unref (queue->starting_segment);
+ queue->starting_segment = NULL;
+ }
+ break;
+ case GST_STATE_CHANGE_READY_TO_NULL:
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/* 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 */
+#define QUEUE_CAPACITY_CHANGE(q)\
+ g_cond_signal (queue->item_del);
+
+/* 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)\
+ g_cond_signal (queue->item_add);
+
+static gboolean
+gst_queue_set_temp_location (GstQueue * queue, const gchar * location)
+{
+ GstState state;
+
+ /* the element must be stopped in order to do this */
+ GST_OBJECT_LOCK (queue);
+ state = GST_STATE (queue);
+ if (state != GST_STATE_READY && state != GST_STATE_NULL)
+ goto wrong_state;
+ GST_OBJECT_UNLOCK (queue);
+
+ /* set new location */
+ g_free (queue->temp_location);
+ queue->temp_location = g_strdup (location);
+
+ g_object_notify (G_OBJECT (queue), "temp-location");
+
+ return TRUE;
+
+/* ERROR */
+wrong_state:
+ {
+ GST_DEBUG_OBJECT (queue, "setting temp-location in wrong state");
+ GST_OBJECT_UNLOCK (queue);
+ return FALSE;
+ }
+}
+
+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_level.bytes = g_value_get_uint (value);
+ QUEUE_CAPACITY_CHANGE (queue);
+ break;
+ case PROP_MAX_SIZE_BUFFERS:
+ queue->max_level.buffers = g_value_get_uint (value);
+ QUEUE_CAPACITY_CHANGE (queue);
+ break;
+ case PROP_MAX_SIZE_TIME:
+ queue->max_level.time = g_value_get_uint64 (value);
+ /* set rate_time to the same value. We use an extra field in the level
+ * structure so that we can easily access and compare it */
+ queue->max_level.rate_time = queue->max_level.time;
+ QUEUE_CAPACITY_CHANGE (queue);
+ break;
+ case PROP_USE_BUFFERING:
+ queue->use_buffering = g_value_get_boolean (value);
+ break;
+ case PROP_USE_RATE_ESTIMATE:
+ queue->use_rate_estimate = g_value_get_boolean (value);
+ break;
+ case PROP_LOW_PERCENT:
+ queue->low_percent = g_value_get_int (value);
+ break;
+ case PROP_HIGH_PERCENT:
+ queue->high_percent = g_value_get_int (value);
+ break;
+ case PROP_TEMP_LOCATION:
+ gst_queue_set_temp_location (queue, g_value_dup_string (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_level.bytes);
+ break;
+ case PROP_MAX_SIZE_BUFFERS:
+ g_value_set_uint (value, queue->max_level.buffers);
+ break;
+ case PROP_MAX_SIZE_TIME:
+ g_value_set_uint64 (value, queue->max_level.time);
+ break;
+ case PROP_USE_BUFFERING:
+ g_value_set_boolean (value, queue->use_buffering);
+ break;
+ case PROP_USE_RATE_ESTIMATE:
+ g_value_set_boolean (value, queue->use_rate_estimate);
+ break;
+ case PROP_LOW_PERCENT:
+ g_value_set_int (value, queue->low_percent);
+ break;
+ case PROP_HIGH_PERCENT:
+ g_value_set_int (value, queue->high_percent);
+ break;
+ case PROP_TEMP_LOCATION:
+ g_value_set_string (value, queue->temp_location);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+
+ GST_QUEUE_MUTEX_UNLOCK (queue);
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+ GST_DEBUG_CATEGORY_INIT (queue_debug, "queue2", 0, "queue element");
+ GST_DEBUG_CATEGORY_INIT (queue_dataflow, "queue2_dataflow", 0,
+ "dataflow inside the queue element");
+
+#ifdef ENABLE_NLS
+ GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE,
+ LOCALEDIR);
+ bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+#endif /* ENABLE_NLS */
+
+ return gst_element_register (plugin, "queue2", GST_RANK_NONE, GST_TYPE_QUEUE);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "queue2",
+ "Queue newer version", plugin_init, VERSION, GST_LICENSE,
+ GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
+
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+GstPluginDesc* _GST_PLUGIN_DESC()
+{
+ return &gst_plugin_desc;
+}
+