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Original commit message from CVS: * gst/base/gstbasesink.c: (gst_base_sink_handle_object), (gst_base_sink_handle_buffer): Better log message. * gst/gstbus.h: * gst/gstelement.h: More docs. * gst/gstqueue.c: (gst_queue_class_init), (gst_queue_init), (gst_queue_set_property), (gst_queue_get_property): * gst/gstqueue.h: Remove old unused properties.
1116 lines
34 KiB
C
1116 lines
34 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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* 2003 Colin Walters <cwalters@gnome.org>
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* 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstqueue.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gstqueue
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* @short_description: Simple asynchronous data queue.
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*
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* Data is queued till max_level buffers have been stored. Any subsequent
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* buffers sent to this filter will block until free space becomes available in
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* the buffer. The queue is typically used in conjunction with a thread.
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*
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* You can query how many buffers are queued with the level argument.
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*
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* The default queue length is set to 100.
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*
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* The queue blocks by default.
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*/
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#include "gst_private.h"
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#include "gstqueue.h"
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#include "gstevent.h"
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#include "gstinfo.h"
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#include "gsterror.h"
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#include "gstutils.h"
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static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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GST_DEBUG_CATEGORY_STATIC (queue_dataflow);
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#define GST_CAT_DEFAULT (queue_dataflow)
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#define STATUS(queue, msg) \
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GST_CAT_LOG_OBJECT (queue_dataflow, queue, \
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"(%s:%s) " msg ": %u of %u-%u buffers, %u of %u-%u " \
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"bytes, %" G_GUINT64_FORMAT " of %" G_GUINT64_FORMAT \
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"-%" G_GUINT64_FORMAT " ns, %u elements", \
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GST_DEBUG_PAD_NAME (pad), \
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queue->cur_level.buffers, \
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queue->min_threshold.buffers, \
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queue->max_size.buffers, \
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queue->cur_level.bytes, \
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queue->min_threshold.bytes, \
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queue->max_size.bytes, \
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queue->cur_level.time, \
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queue->min_threshold.time, \
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queue->max_size.time, \
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queue->queue->length)
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static GstElementDetails gst_queue_details = GST_ELEMENT_DETAILS ("Queue",
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"Generic",
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"Simple data queue",
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"Erik Walthinsen <omega@cse.ogi.edu>");
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/* Queue signals and args */
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enum
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{
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SIGNAL_UNDERRUN,
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SIGNAL_RUNNING,
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SIGNAL_OVERRUN,
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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/* FIXME: don't we have another way of doing this
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* "Gstreamer format" (frame/byte/time) queries? */
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ARG_CUR_LEVEL_BUFFERS,
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ARG_CUR_LEVEL_BYTES,
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ARG_CUR_LEVEL_TIME,
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ARG_MAX_SIZE_BUFFERS,
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ARG_MAX_SIZE_BYTES,
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ARG_MAX_SIZE_TIME,
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ARG_MIN_THRESHOLD_BUFFERS,
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ARG_MIN_THRESHOLD_BYTES,
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ARG_MIN_THRESHOLD_TIME,
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ARG_LEAKY,
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/* FILL ME */
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};
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#define GST_QUEUE_MUTEX_LOCK(q) G_STMT_START { \
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GST_CAT_LOG_OBJECT (queue_dataflow, q, \
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"locking qlock from thread %p", \
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g_thread_self ()); \
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g_mutex_lock (q->qlock); \
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GST_CAT_LOG_OBJECT (queue_dataflow, q, \
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"locked qlock from thread %p", \
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g_thread_self ()); \
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} G_STMT_END
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#define GST_QUEUE_MUTEX_LOCK_CHECK(q,label) G_STMT_START { \
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GST_QUEUE_MUTEX_LOCK (q); \
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if (q->srcresult != GST_FLOW_OK) \
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goto label; \
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} G_STMT_END
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#define GST_QUEUE_MUTEX_UNLOCK(q) G_STMT_START { \
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GST_CAT_LOG_OBJECT (queue_dataflow, q, \
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"unlocking qlock from thread %p", \
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g_thread_self ()); \
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g_mutex_unlock (q->qlock); \
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} G_STMT_END
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static void gst_queue_base_init (GstQueueClass * klass);
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static void gst_queue_class_init (GstQueueClass * klass);
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static void gst_queue_init (GstQueue * queue);
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static void gst_queue_finalize (GObject * object);
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static void gst_queue_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_queue_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static GstFlowReturn gst_queue_chain (GstPad * pad, GstBuffer * buffer);
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static GstFlowReturn gst_queue_bufferalloc (GstPad * pad, guint64 offset,
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guint size, GstCaps * caps, GstBuffer ** buf);
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static void gst_queue_loop (GstPad * pad);
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static gboolean gst_queue_handle_sink_event (GstPad * pad, GstEvent * event);
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static gboolean gst_queue_handle_src_event (GstPad * pad, GstEvent * event);
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static gboolean gst_queue_handle_src_query (GstPad * pad, GstQuery * query);
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static GstCaps *gst_queue_getcaps (GstPad * pad);
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static GstPadLinkReturn gst_queue_link_sink (GstPad * pad, GstPad * peer);
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static GstPadLinkReturn gst_queue_link_src (GstPad * pad, GstPad * peer);
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static void gst_queue_locked_flush (GstQueue * queue);
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static gboolean gst_queue_src_activate_push (GstPad * pad, gboolean active);
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static gboolean gst_queue_sink_activate_push (GstPad * pad, gboolean active);
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static GstStateChangeReturn gst_queue_change_state (GstElement * element,
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GstStateChange transition);
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#define GST_TYPE_QUEUE_LEAKY (queue_leaky_get_type ())
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static GType
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queue_leaky_get_type (void)
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{
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static GType queue_leaky_type = 0;
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static GEnumValue queue_leaky[] = {
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{GST_QUEUE_NO_LEAK, "0", "Not Leaky"},
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{GST_QUEUE_LEAK_UPSTREAM, "1", "Leaky on Upstream"},
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{GST_QUEUE_LEAK_DOWNSTREAM, "2", "Leaky on Downstream"},
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{0, NULL, NULL},
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};
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if (!queue_leaky_type) {
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queue_leaky_type = g_enum_register_static ("GstQueueLeaky", queue_leaky);
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}
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return queue_leaky_type;
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}
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static GstElementClass *parent_class = NULL;
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static guint gst_queue_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_queue_get_type (void)
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{
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static GType queue_type = 0;
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if (!queue_type) {
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static const GTypeInfo queue_info = {
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sizeof (GstQueueClass),
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(GBaseInitFunc) gst_queue_base_init,
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NULL,
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(GClassInitFunc) gst_queue_class_init,
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NULL,
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NULL,
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sizeof (GstQueue),
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0,
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(GInstanceInitFunc) gst_queue_init,
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NULL
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};
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queue_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstQueue", &queue_info, 0);
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GST_DEBUG_CATEGORY_INIT (queue_dataflow, "queue_dataflow", 0,
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"dataflow inside the queue element");
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}
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return queue_type;
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}
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static void
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gst_queue_base_init (GstQueueClass * klass)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&srctemplate));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sinktemplate));
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gst_element_class_set_details (gstelement_class, &gst_queue_details);
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}
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static void
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gst_queue_class_init (GstQueueClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_queue_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_queue_get_property);
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/* signals */
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/**
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* GstQueue::underrun:
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* @queue: the queue instance
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*
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* Reports that the buffer became empty (underrun).
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* A buffer is empty if the total amount of data inside it (num-buffers, time,
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* size) is lower than the boundary values which can be set through the GObject
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* properties.
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*/
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gst_queue_signals[SIGNAL_UNDERRUN] =
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g_signal_new ("underrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GstQueueClass, underrun), NULL, NULL,
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g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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/**
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* GstQueue::running:
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* @queue: the queue instance
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*
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* Reports that enough (min-threshold) data is in the queue. Use this signal
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* together with the underrun signal to pause the pipeline on underrun and wait
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* for the queue to fill-up before resume playback.
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*/
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gst_queue_signals[SIGNAL_RUNNING] =
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g_signal_new ("running", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GstQueueClass, running), NULL, NULL,
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g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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/**
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* GstQueue::overrun:
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* @queue: the queue instance
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*
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* Reports that the buffer became full (overrun).
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* A buffer is full if the total amount of data inside it (num-buffers, time,
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* size) is higher than the boundary values which can be set through the GObject
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* properties.
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*/
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gst_queue_signals[SIGNAL_OVERRUN] =
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g_signal_new ("overrun", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GstQueueClass, overrun), NULL, NULL,
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g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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/* properties */
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g_object_class_install_property (gobject_class, ARG_CUR_LEVEL_BYTES,
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g_param_spec_uint ("current-level-bytes", "Current level (kB)",
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"Current amount of data in the queue (bytes)",
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0, G_MAXUINT, 0, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_CUR_LEVEL_BUFFERS,
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g_param_spec_uint ("current-level-buffers", "Current level (buffers)",
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"Current number of buffers in the queue",
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0, G_MAXUINT, 0, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_CUR_LEVEL_TIME,
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g_param_spec_uint64 ("current-level-time", "Current level (ns)",
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"Current amount of data in the queue (in ns)",
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0, G_MAXUINT64, 0, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class, ARG_MAX_SIZE_BYTES,
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g_param_spec_uint ("max-size-bytes", "Max. size (kB)",
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"Max. amount of data in the queue (bytes, 0=disable)",
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0, G_MAXUINT, 0, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_MAX_SIZE_BUFFERS,
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g_param_spec_uint ("max-size-buffers", "Max. size (buffers)",
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"Max. number of buffers in the queue (0=disable)",
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0, G_MAXUINT, 0, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_MAX_SIZE_TIME,
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g_param_spec_uint64 ("max-size-time", "Max. size (ns)",
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"Max. amount of data in the queue (in ns, 0=disable)",
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0, G_MAXUINT64, 0, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_MIN_THRESHOLD_BYTES,
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g_param_spec_uint ("min-threshold-bytes", "Min. threshold (kB)",
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"Min. amount of data in the queue to allow reading (bytes, 0=disable)",
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0, G_MAXUINT, 0, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_MIN_THRESHOLD_BUFFERS,
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g_param_spec_uint ("min-threshold-buffers", "Min. threshold (buffers)",
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"Min. number of buffers in the queue to allow reading (0=disable)",
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0, G_MAXUINT, 0, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_MIN_THRESHOLD_TIME,
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g_param_spec_uint64 ("min-threshold-time", "Min. threshold (ns)",
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"Min. amount of data in the queue to allow reading (in ns, 0=disable)",
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0, G_MAXUINT64, 0, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, ARG_LEAKY,
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g_param_spec_enum ("leaky", "Leaky",
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"Where the queue leaks, if at all",
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GST_TYPE_QUEUE_LEAKY, GST_QUEUE_NO_LEAK, G_PARAM_READWRITE));
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/* set several parent class virtual functions */
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_queue_finalize);
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gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_queue_change_state);
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}
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static void
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gst_queue_init (GstQueue * queue)
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{
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queue->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get (&sinktemplate),
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"sink");
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gst_pad_set_chain_function (queue->sinkpad,
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GST_DEBUG_FUNCPTR (gst_queue_chain));
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gst_pad_set_activatepush_function (queue->sinkpad,
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GST_DEBUG_FUNCPTR (gst_queue_sink_activate_push));
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gst_pad_set_event_function (queue->sinkpad,
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GST_DEBUG_FUNCPTR (gst_queue_handle_sink_event));
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gst_pad_set_link_function (queue->sinkpad,
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GST_DEBUG_FUNCPTR (gst_queue_link_sink));
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gst_pad_set_getcaps_function (queue->sinkpad,
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GST_DEBUG_FUNCPTR (gst_queue_getcaps));
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gst_pad_set_bufferalloc_function (queue->sinkpad,
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GST_DEBUG_FUNCPTR (gst_queue_bufferalloc));
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gst_element_add_pad (GST_ELEMENT (queue), queue->sinkpad);
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queue->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get (&srctemplate),
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"src");
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gst_pad_set_activatepush_function (queue->srcpad,
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GST_DEBUG_FUNCPTR (gst_queue_src_activate_push));
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gst_pad_set_link_function (queue->srcpad,
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GST_DEBUG_FUNCPTR (gst_queue_link_src));
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gst_pad_set_getcaps_function (queue->srcpad,
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GST_DEBUG_FUNCPTR (gst_queue_getcaps));
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gst_pad_set_event_function (queue->srcpad,
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GST_DEBUG_FUNCPTR (gst_queue_handle_src_event));
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gst_pad_set_query_function (queue->srcpad,
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GST_DEBUG_FUNCPTR (gst_queue_handle_src_query));
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gst_element_add_pad (GST_ELEMENT (queue), queue->srcpad);
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queue->cur_level.buffers = 0; /* no content */
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queue->cur_level.bytes = 0; /* no content */
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queue->cur_level.time = 0; /* no content */
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queue->max_size.buffers = 200; /* 200 buffers */
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queue->max_size.bytes = 10 * 1024 * 1024; /* 10 MB */
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queue->max_size.time = GST_SECOND; /* 1 s. */
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queue->min_threshold.buffers = 0; /* no threshold */
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queue->min_threshold.bytes = 0; /* no threshold */
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queue->min_threshold.time = 0; /* no threshold */
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queue->leaky = GST_QUEUE_NO_LEAK;
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queue->srcresult = GST_FLOW_WRONG_STATE;
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queue->qlock = g_mutex_new ();
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queue->item_add = g_cond_new ();
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queue->item_del = g_cond_new ();
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queue->queue = g_queue_new ();
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GST_CAT_DEBUG_OBJECT (GST_CAT_THREAD, queue,
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"initialized queue's not_empty & not_full conditions");
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}
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/* called only once, as opposed to dispose */
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static void
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gst_queue_finalize (GObject * object)
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{
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GstQueue *queue = GST_QUEUE (object);
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GST_DEBUG_OBJECT (queue, "finalizing queue");
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while (!g_queue_is_empty (queue->queue)) {
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GstMiniObject *data = g_queue_pop_head (queue->queue);
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gst_mini_object_unref (data);
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}
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g_queue_free (queue->queue);
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GST_CAT_DEBUG_OBJECT (GST_CAT_THREAD, queue, "free mutex");
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g_mutex_free (queue->qlock);
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GST_CAT_DEBUG_OBJECT (GST_CAT_THREAD, queue, "done free mutex");
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g_cond_free (queue->item_add);
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g_cond_free (queue->item_del);
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if (G_OBJECT_CLASS (parent_class)->finalize)
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static GstCaps *
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gst_queue_getcaps (GstPad * pad)
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{
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GstQueue *queue;
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GstPad *otherpad;
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GstCaps *result;
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queue = GST_QUEUE (GST_PAD_PARENT (pad));
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otherpad = (pad == queue->srcpad ? queue->sinkpad : queue->srcpad);
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result = gst_pad_peer_get_caps (otherpad);
|
|
if (result == NULL)
|
|
result = gst_caps_new_any ();
|
|
|
|
return result;
|
|
}
|
|
|
|
static GstPadLinkReturn
|
|
gst_queue_link_sink (GstPad * pad, GstPad * peer)
|
|
{
|
|
return GST_PAD_LINK_OK;
|
|
}
|
|
|
|
static GstPadLinkReturn
|
|
gst_queue_link_src (GstPad * pad, GstPad * peer)
|
|
{
|
|
GstPadLinkReturn result = GST_PAD_LINK_OK;
|
|
GstQueue *queue;
|
|
|
|
queue = GST_QUEUE (gst_pad_get_parent (pad));
|
|
|
|
GST_DEBUG ("queue linking source pad");
|
|
|
|
if (GST_PAD_LINKFUNC (peer)) {
|
|
result = GST_PAD_LINKFUNC (peer) (peer, pad);
|
|
}
|
|
|
|
if (GST_PAD_LINK_SUCCESSFUL (result)) {
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
if (queue->srcresult == GST_FLOW_OK) {
|
|
gst_pad_start_task (pad, (GstTaskFunction) gst_queue_loop, pad);
|
|
GST_DEBUG ("starting task as pad is linked");
|
|
} else {
|
|
GST_DEBUG ("not starting task reason %s",
|
|
gst_flow_get_name (queue->srcresult));
|
|
}
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
}
|
|
gst_object_unref (queue);
|
|
|
|
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));
|
|
|
|
result = gst_pad_alloc_buffer (queue->srcpad, offset, size, caps, buf);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_queue_locked_flush (GstQueue * queue)
|
|
{
|
|
while (!g_queue_is_empty (queue->queue)) {
|
|
GstMiniObject *data = g_queue_pop_head (queue->queue);
|
|
|
|
/* Then loose another reference because we are supposed to destroy that
|
|
data when flushing */
|
|
gst_mini_object_unref (data);
|
|
}
|
|
queue->cur_level.buffers = 0;
|
|
queue->cur_level.bytes = 0;
|
|
queue->cur_level.time = 0;
|
|
|
|
/* we deleted something... */
|
|
g_cond_signal (queue->item_del);
|
|
}
|
|
|
|
#define STATUS(queue, 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 elements", \
|
|
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)
|
|
|
|
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:
|
|
STATUS (queue, "received flush start event");
|
|
/* forward event, re first as we're going to use it still */
|
|
gst_event_ref (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 */
|
|
gst_pad_pause_task (queue->srcpad);
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "loop stopped");
|
|
gst_event_unref (event);
|
|
goto done;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
STATUS (queue, "received flush stop event");
|
|
/* forward event, re first as we're going to use it still */
|
|
gst_event_ref (event);
|
|
gst_pad_push_event (queue->srcpad, event);
|
|
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
gst_queue_locked_flush (queue);
|
|
queue->srcresult = GST_FLOW_OK;
|
|
if (gst_pad_is_linked (queue->srcpad)) {
|
|
gst_pad_start_task (queue->srcpad, (GstTaskFunction) gst_queue_loop,
|
|
queue->srcpad);
|
|
} else {
|
|
GST_DEBUG_OBJECT (queue, "not re-starting task as pad is not linked");
|
|
}
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
STATUS (queue, "after flush");
|
|
gst_event_unref (event);
|
|
goto done;
|
|
case GST_EVENT_EOS:
|
|
STATUS (queue, "received EOS");
|
|
break;
|
|
default:
|
|
if (GST_EVENT_IS_SERIALIZED (event)) {
|
|
/* we put the event in the queue, we don't have to act ourselves */
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"adding event %p of type %d", event, GST_EVENT_TYPE (event));
|
|
} else {
|
|
gst_event_ref (event);
|
|
gst_pad_push_event (queue->srcpad, event);
|
|
gst_event_unref (event);
|
|
goto done;
|
|
}
|
|
break;
|
|
}
|
|
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
g_queue_push_tail (queue->queue, event);
|
|
g_cond_signal (queue->item_add);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
done:
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_queue_is_empty (GstQueue * queue)
|
|
{
|
|
return (queue->queue->length == 0 ||
|
|
(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));
|
|
}
|
|
|
|
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 GstFlowReturn
|
|
gst_queue_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstQueue *queue;
|
|
|
|
queue = GST_QUEUE (GST_OBJECT_PARENT (pad));
|
|
|
|
/* we have to lock the queue since we span threads */
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"adding buffer %p of size %d", buffer, GST_BUFFER_SIZE (buffer));
|
|
|
|
/* 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)) {
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
g_signal_emit (G_OBJECT (queue), gst_queue_signals[SIGNAL_OVERRUN], 0);
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
|
|
/* how are we going to make space for this buffer? */
|
|
switch (queue->leaky) {
|
|
/* leak current buffer */
|
|
case GST_QUEUE_LEAK_UPSTREAM:
|
|
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;
|
|
|
|
/* leak first buffer in the queue */
|
|
case GST_QUEUE_LEAK_DOWNSTREAM:{
|
|
/* this is a bit hacky. We'll manually iterate the list
|
|
* and find the first buffer from the head on. We'll
|
|
* unref that and "fix up" the GQueue object... */
|
|
GList *item;
|
|
GstMiniObject *leak = NULL;
|
|
|
|
GST_CAT_DEBUG_OBJECT (queue_dataflow, queue,
|
|
"queue is full, leaking buffer on downstream end");
|
|
|
|
for (item = queue->queue->head; item != NULL; item = item->next) {
|
|
if (GST_IS_BUFFER (item->data)) {
|
|
leak = item->data;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* if we didn't find anything, it means we have no buffers
|
|
* in here. That cannot happen, since we had >= 1 bufs */
|
|
g_assert (leak);
|
|
|
|
/* Now remove it from the list, fixing up the GQueue
|
|
* CHECKME: is a queue->head the first or the last item? */
|
|
item = g_list_delete_link (queue->queue->head, item);
|
|
queue->queue->head = g_list_first (item);
|
|
queue->queue->tail = g_list_last (item);
|
|
queue->queue->length--;
|
|
|
|
/* and unref the buffer at the end. Twice, because we keep a ref
|
|
* to make things read-only. Also keep our list uptodate. */
|
|
queue->cur_level.bytes -= GST_BUFFER_SIZE (buffer);
|
|
queue->cur_level.buffers--;
|
|
if (GST_BUFFER_DURATION (buffer) != GST_CLOCK_TIME_NONE)
|
|
queue->cur_level.time -= GST_BUFFER_DURATION (buffer);
|
|
|
|
gst_buffer_unref (buffer);
|
|
gst_buffer_unref (buffer);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
g_warning ("Unknown leaky type, using default");
|
|
/* fall-through */
|
|
|
|
/* don't leak. Instead, wait for space to be available */
|
|
case GST_QUEUE_NO_LEAK:
|
|
STATUS (queue, "pre-full wait");
|
|
|
|
while (gst_queue_is_filled (queue)) {
|
|
STATUS (queue, "waiting for item_del signal from thread using qlock");
|
|
g_cond_wait (queue->item_del, queue->qlock);
|
|
|
|
if (queue->srcresult != GST_FLOW_OK)
|
|
goto out_flushing;
|
|
|
|
/* if there's a pending state change for this queue
|
|
* or its manager, switch back to iterator so bottom
|
|
* half of state change executes */
|
|
STATUS (queue, "received item_del signal from thread using qlock");
|
|
}
|
|
|
|
STATUS (queue, "post-full wait");
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
g_signal_emit (G_OBJECT (queue), gst_queue_signals[SIGNAL_RUNNING], 0);
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
g_queue_push_tail (queue->queue, buffer);
|
|
|
|
/* add buffer to the statistics */
|
|
queue->cur_level.buffers++;
|
|
queue->cur_level.bytes += GST_BUFFER_SIZE (buffer);
|
|
if (GST_BUFFER_DURATION (buffer) != GST_CLOCK_TIME_NONE)
|
|
queue->cur_level.time += GST_BUFFER_DURATION (buffer);
|
|
|
|
STATUS (queue, "+ level");
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "signalling item_add");
|
|
g_cond_signal (queue->item_add);
|
|
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;
|
|
const gchar *flowname = gst_flow_get_name (ret);
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"exit because task paused, reason: %s", flowname);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
gst_buffer_unref (buffer);
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_queue_loop (GstPad * pad)
|
|
{
|
|
GstQueue *queue;
|
|
GstMiniObject *data;
|
|
gboolean restart = TRUE;
|
|
|
|
queue = GST_QUEUE (GST_PAD_PARENT (pad));
|
|
|
|
/* have to lock for thread-safety */
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
|
|
restart:
|
|
while (gst_queue_is_empty (queue)) {
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
g_signal_emit (G_OBJECT (queue), gst_queue_signals[SIGNAL_UNDERRUN], 0);
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
|
|
STATUS (queue, "pre-empty wait");
|
|
while (gst_queue_is_empty (queue)) {
|
|
STATUS (queue, "waiting for item_add");
|
|
|
|
GST_LOG_OBJECT (queue, "doing g_cond_wait using qlock from thread %p",
|
|
g_thread_self ());
|
|
g_cond_wait (queue->item_add, queue->qlock);
|
|
|
|
/* we released the lock in the g_cond above so we might be
|
|
* flushing now */
|
|
if (queue->srcresult != GST_FLOW_OK)
|
|
goto out_flushing;
|
|
|
|
GST_LOG_OBJECT (queue, "done g_cond_wait using qlock from thread %p",
|
|
g_thread_self ());
|
|
STATUS (queue, "got item_add signal");
|
|
}
|
|
|
|
STATUS (queue, "post-empty wait");
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
g_signal_emit (G_OBJECT (queue), gst_queue_signals[SIGNAL_RUNNING], 0);
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
}
|
|
|
|
/* There's something in the list now, whatever it is */
|
|
data = g_queue_pop_head (queue->queue);
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"retrieved data %p from queue", data);
|
|
|
|
if (GST_IS_BUFFER (data)) {
|
|
GstFlowReturn result;
|
|
|
|
/* Update statistics */
|
|
queue->cur_level.buffers--;
|
|
queue->cur_level.bytes -= GST_BUFFER_SIZE (data);
|
|
if (GST_BUFFER_DURATION (data) != GST_CLOCK_TIME_NONE)
|
|
queue->cur_level.time -= GST_BUFFER_DURATION (data);
|
|
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
result = gst_pad_push (pad, GST_BUFFER (data));
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
/* can opt to check for srcresult here but the push should
|
|
* return an error value that is more accurate */
|
|
if (result != GST_FLOW_OK) {
|
|
const gchar *flowname;
|
|
|
|
flowname = gst_flow_get_name (result);
|
|
|
|
queue->srcresult = result;
|
|
if (GST_FLOW_IS_FATAL (result)) {
|
|
GST_ELEMENT_ERROR (queue, STREAM, STOPPED,
|
|
("streaming stopped, reason %s", flowname),
|
|
("streaming stopped, reason %s", flowname));
|
|
gst_pad_push_event (queue->srcpad, gst_event_new_eos ());
|
|
}
|
|
GST_DEBUG ("pausing queue, reason %s", flowname);
|
|
gst_pad_pause_task (queue->srcpad);
|
|
}
|
|
} else {
|
|
if (GST_EVENT_TYPE (data) == GST_EVENT_EOS) {
|
|
/* all incomming data is now unexpected */
|
|
queue->srcresult = GST_FLOW_UNEXPECTED;
|
|
/* and we don't need to process anymore */
|
|
GST_DEBUG ("pausing queue, we're EOS now");
|
|
gst_pad_pause_task (queue->srcpad);
|
|
restart = FALSE;
|
|
}
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
gst_pad_push_event (queue->srcpad, GST_EVENT (data));
|
|
GST_QUEUE_MUTEX_LOCK_CHECK (queue, out_flushing);
|
|
if (restart == TRUE)
|
|
goto restart;
|
|
}
|
|
|
|
STATUS (queue, "after _get()");
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue, "signalling item_del");
|
|
g_cond_signal (queue->item_del);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
return;
|
|
|
|
out_flushing:
|
|
{
|
|
const gchar *flowname = gst_flow_get_name (queue->srcresult);
|
|
|
|
GST_CAT_LOG_OBJECT (queue_dataflow, queue,
|
|
"exit because task paused, reason: %s", flowname);
|
|
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 (%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, GstQuery * query)
|
|
{
|
|
GstQueue *queue = GST_QUEUE (GST_PAD_PARENT (pad));
|
|
GstPad *peer;
|
|
gboolean res;
|
|
|
|
if (!(peer = gst_pad_get_peer (queue->sinkpad)))
|
|
return FALSE;
|
|
|
|
res = gst_pad_query (peer, query);
|
|
gst_object_unref (peer);
|
|
if (!res)
|
|
return FALSE;
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
case GST_QUERY_POSITION:
|
|
{
|
|
gint64 peer_pos, peer_total;
|
|
GstFormat format;
|
|
|
|
/* get peer position */
|
|
gst_query_parse_position (query, &format, &peer_pos, &peer_total);
|
|
|
|
/* 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:
|
|
/* FIXME */
|
|
break;
|
|
}
|
|
/* set updated positions */
|
|
gst_query_set_position (query, format, peer_pos, peer_total);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
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);
|
|
queue->srcresult = GST_FLOW_OK;
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
} else {
|
|
/* step 1, unblock chain function */
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
queue->srcresult = GST_FLOW_WRONG_STATE;
|
|
gst_queue_locked_flush (queue);
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
|
|
/* and make sure the chain function finishes */
|
|
GST_STREAM_LOCK (pad);
|
|
GST_STREAM_UNLOCK (pad);
|
|
}
|
|
|
|
gst_object_unref (queue);
|
|
|
|
return result;
|
|
}
|
|
|
|
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);
|
|
queue->srcresult = GST_FLOW_OK;
|
|
/* we do not start the task yet if the pad is not connected */
|
|
if (gst_pad_is_linked (pad))
|
|
result = gst_pad_start_task (pad, (GstTaskFunction) gst_queue_loop, pad);
|
|
else {
|
|
GST_DEBUG_OBJECT (queue, "not starting task as pad is not linked");
|
|
result = TRUE;
|
|
}
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
} else {
|
|
/* step 1, unblock loop function */
|
|
GST_QUEUE_MUTEX_LOCK (queue);
|
|
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;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_queue_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstQueue *queue;
|
|
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
|
|
|
|
queue = GST_QUEUE (element);
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_STATES, element, "starting state change");
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
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:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
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 ARG_MAX_SIZE_BYTES:
|
|
queue->max_size.bytes = g_value_get_uint (value);
|
|
break;
|
|
case ARG_MAX_SIZE_BUFFERS:
|
|
queue->max_size.buffers = g_value_get_uint (value);
|
|
break;
|
|
case ARG_MAX_SIZE_TIME:
|
|
queue->max_size.time = g_value_get_uint64 (value);
|
|
break;
|
|
case ARG_MIN_THRESHOLD_BYTES:
|
|
queue->min_threshold.bytes = g_value_get_uint (value);
|
|
break;
|
|
case ARG_MIN_THRESHOLD_BUFFERS:
|
|
queue->min_threshold.buffers = g_value_get_uint (value);
|
|
break;
|
|
case ARG_MIN_THRESHOLD_TIME:
|
|
queue->min_threshold.time = g_value_get_uint64 (value);
|
|
break;
|
|
case ARG_LEAKY:
|
|
queue->leaky = g_value_get_enum (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 ARG_CUR_LEVEL_BYTES:
|
|
g_value_set_uint (value, queue->cur_level.bytes);
|
|
break;
|
|
case ARG_CUR_LEVEL_BUFFERS:
|
|
g_value_set_uint (value, queue->cur_level.buffers);
|
|
break;
|
|
case ARG_CUR_LEVEL_TIME:
|
|
g_value_set_uint64 (value, queue->cur_level.time);
|
|
break;
|
|
case ARG_MAX_SIZE_BYTES:
|
|
g_value_set_uint (value, queue->max_size.bytes);
|
|
break;
|
|
case ARG_MAX_SIZE_BUFFERS:
|
|
g_value_set_uint (value, queue->max_size.buffers);
|
|
break;
|
|
case ARG_MAX_SIZE_TIME:
|
|
g_value_set_uint64 (value, queue->max_size.time);
|
|
break;
|
|
case ARG_MIN_THRESHOLD_BYTES:
|
|
g_value_set_uint (value, queue->min_threshold.bytes);
|
|
break;
|
|
case ARG_MIN_THRESHOLD_BUFFERS:
|
|
g_value_set_uint (value, queue->min_threshold.buffers);
|
|
break;
|
|
case ARG_MIN_THRESHOLD_TIME:
|
|
g_value_set_uint64 (value, queue->min_threshold.time);
|
|
break;
|
|
case ARG_LEAKY:
|
|
g_value_set_enum (value, queue->leaky);
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
|
|
GST_QUEUE_MUTEX_UNLOCK (queue);
|
|
}
|