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637c74bdb8
Original commit message from CVS: * gst/base/gstbasesink.c: (gst_basesink_class_init), (gst_basesink_init), (gst_basesink_finalize), (gst_basesink_activate), (gst_basesink_change_state): Don't free preroll queue too early.
928 lines
25 KiB
C
928 lines
25 KiB
C
/* GStreamer
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* Copyright (C) 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstbasesink.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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "gstbasesink.h"
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#include <gst/gstmarshal.h>
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GST_DEBUG_CATEGORY_STATIC (gst_basesink_debug);
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#define GST_CAT_DEFAULT gst_basesink_debug
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/* #define DEBUGGING */
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#ifdef DEBUGGING
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#define DEBUG(str,args...) g_print (str,##args)
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#else
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#define DEBUG(str,args...)
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#endif
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/* BaseSink signals and properties */
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enum
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{
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/* FILL ME */
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SIGNAL_HANDOFF,
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LAST_SIGNAL
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};
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/* FIXME, need to figure out a better way to handle the pull mode */
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#define DEFAULT_SIZE 1024
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#define DEFAULT_HAS_LOOP FALSE
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#define DEFAULT_HAS_CHAIN TRUE
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enum
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{
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PROP_0,
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PROP_HAS_LOOP,
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PROP_HAS_CHAIN,
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PROP_PREROLL_QUEUE_LEN
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};
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static GstElementClass *parent_class = NULL;
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static void gst_basesink_base_init (gpointer g_class);
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static void gst_basesink_class_init (GstBaseSinkClass * klass);
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static void gst_basesink_init (GstBaseSink * trans, gpointer g_class);
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static void gst_basesink_finalize (GObject * object);
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GType
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gst_basesink_get_type (void)
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{
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static GType basesink_type = 0;
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if (!basesink_type) {
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static const GTypeInfo basesink_info = {
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sizeof (GstBaseSinkClass),
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(GBaseInitFunc) gst_basesink_base_init,
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NULL,
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(GClassInitFunc) gst_basesink_class_init,
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NULL,
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NULL,
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sizeof (GstBaseSink),
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0,
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(GInstanceInitFunc) gst_basesink_init,
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};
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basesink_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstBaseSink", &basesink_info, G_TYPE_FLAG_ABSTRACT);
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}
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return basesink_type;
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}
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static void gst_basesink_set_clock (GstElement * element, GstClock * clock);
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static void gst_basesink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_basesink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstCaps *gst_base_sink_get_caps (GstBaseSink * sink);
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static gboolean gst_base_sink_set_caps (GstBaseSink * sink, GstCaps * caps);
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static GstBuffer *gst_base_sink_buffer_alloc (GstBaseSink * sink,
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guint64 offset, guint size, GstCaps * caps);
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static void gst_basesink_get_times (GstBaseSink * basesink, GstBuffer * buffer,
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GstClockTime * start, GstClockTime * end);
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static GstElementStateReturn gst_basesink_change_state (GstElement * element);
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static GstFlowReturn gst_basesink_chain_unlocked (GstPad * pad,
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GstBuffer * buffer);
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static void gst_basesink_loop (GstPad * pad);
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static GstFlowReturn gst_basesink_chain (GstPad * pad, GstBuffer * buffer);
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static gboolean gst_basesink_activate (GstPad * pad, GstActivateMode mode);
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static gboolean gst_basesink_event (GstPad * pad, GstEvent * event);
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static inline GstFlowReturn gst_basesink_handle_buffer (GstBaseSink * basesink,
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GstBuffer * buf);
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static void
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gst_basesink_base_init (gpointer g_class)
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{
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GST_DEBUG_CATEGORY_INIT (gst_basesink_debug, "basesink", 0,
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"basesink element");
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}
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static void
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gst_basesink_class_init (GstBaseSinkClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_basesink_finalize);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_basesink_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_basesink_get_property);
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HAS_LOOP,
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g_param_spec_boolean ("has-loop", "has-loop",
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"Enable loop-based operation", DEFAULT_HAS_LOOP,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_HAS_CHAIN,
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g_param_spec_boolean ("has-chain", "has-chain",
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"Enable chain-based operation", DEFAULT_HAS_CHAIN,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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/* FIXME, this next value should be configured using an event from the
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* upstream element */
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g_object_class_install_property (G_OBJECT_CLASS (klass),
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PROP_PREROLL_QUEUE_LEN,
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g_param_spec_uint ("preroll-queue-len", "preroll-queue-len",
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"Number of buffers to queue during preroll", 0, G_MAXUINT, 0,
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G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
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gstelement_class->set_clock = GST_DEBUG_FUNCPTR (gst_basesink_set_clock);
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_basesink_change_state);
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klass->get_caps = GST_DEBUG_FUNCPTR (gst_base_sink_get_caps);
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klass->set_caps = GST_DEBUG_FUNCPTR (gst_base_sink_set_caps);
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klass->buffer_alloc = GST_DEBUG_FUNCPTR (gst_base_sink_buffer_alloc);
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klass->get_times = GST_DEBUG_FUNCPTR (gst_basesink_get_times);
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}
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static GstCaps *
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gst_basesink_pad_getcaps (GstPad * pad)
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{
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GstBaseSinkClass *bclass;
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GstBaseSink *bsink;
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GstCaps *caps = NULL;
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bsink = GST_BASESINK (GST_PAD_PARENT (pad));
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bclass = GST_BASESINK_GET_CLASS (bsink);
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if (bclass->get_caps)
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caps = bclass->get_caps (bsink);
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if (caps == NULL) {
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GstPadTemplate *pad_template;
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
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if (pad_template != NULL) {
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caps = gst_caps_ref (gst_pad_template_get_caps (pad_template));
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}
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}
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return caps;
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}
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static gboolean
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gst_basesink_pad_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstBaseSinkClass *bclass;
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GstBaseSink *bsink;
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gboolean res = FALSE;
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bsink = GST_BASESINK (GST_PAD_PARENT (pad));
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bclass = GST_BASESINK_GET_CLASS (bsink);
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if (bclass->set_caps)
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res = bclass->set_caps (bsink, caps);
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return res;
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}
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static GstBuffer *
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gst_basesink_pad_buffer_alloc (GstPad * pad, guint64 offset, guint size,
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GstCaps * caps)
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{
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GstBaseSinkClass *bclass;
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GstBaseSink *bsink;
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GstBuffer *buffer = NULL;
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bsink = GST_BASESINK (GST_PAD_PARENT (pad));
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bclass = GST_BASESINK_GET_CLASS (bsink);
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if (bclass->buffer_alloc)
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buffer = bclass->buffer_alloc (bsink, offset, size, caps);
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return buffer;
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}
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static void
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gst_basesink_init (GstBaseSink * basesink, gpointer g_class)
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{
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GstPadTemplate *pad_template;
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
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g_return_if_fail (pad_template != NULL);
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basesink->sinkpad = gst_pad_new_from_template (pad_template, "sink");
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gst_pad_set_getcaps_function (basesink->sinkpad,
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GST_DEBUG_FUNCPTR (gst_basesink_pad_getcaps));
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gst_pad_set_setcaps_function (basesink->sinkpad,
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GST_DEBUG_FUNCPTR (gst_basesink_pad_setcaps));
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gst_pad_set_bufferalloc_function (basesink->sinkpad,
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GST_DEBUG_FUNCPTR (gst_basesink_pad_buffer_alloc));
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gst_element_add_pad (GST_ELEMENT (basesink), basesink->sinkpad);
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basesink->pad_mode = GST_ACTIVATE_NONE;
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GST_RPAD_TASK (basesink->sinkpad) = NULL;
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basesink->preroll_queue = g_queue_new ();
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GST_FLAG_SET (basesink, GST_ELEMENT_IS_SINK);
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}
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static void
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gst_basesink_finalize (GObject * object)
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{
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GstBaseSink *basesink;
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basesink = GST_BASESINK (object);
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g_queue_free (basesink->preroll_queue);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_basesink_set_pad_functions (GstBaseSink * this, GstPad * pad)
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{
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gst_pad_set_activate_function (pad,
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GST_DEBUG_FUNCPTR (gst_basesink_activate));
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gst_pad_set_event_function (pad, GST_DEBUG_FUNCPTR (gst_basesink_event));
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if (this->has_chain)
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gst_pad_set_chain_function (pad, GST_DEBUG_FUNCPTR (gst_basesink_chain));
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else
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gst_pad_set_chain_function (pad, NULL);
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if (this->has_loop)
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gst_pad_set_loop_function (pad, GST_DEBUG_FUNCPTR (gst_basesink_loop));
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else
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gst_pad_set_loop_function (pad, NULL);
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}
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static void
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gst_basesink_set_all_pad_functions (GstBaseSink * this)
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{
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GList *l;
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for (l = GST_ELEMENT_PADS (this); l; l = l->next)
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gst_basesink_set_pad_functions (this, (GstPad *) l->data);
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}
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static void
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gst_basesink_set_clock (GstElement * element, GstClock * clock)
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{
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GstBaseSink *sink;
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sink = GST_BASESINK (element);
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sink->clock = clock;
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}
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static void
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gst_basesink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstBaseSink *sink;
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sink = GST_BASESINK (object);
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GST_LOCK (sink);
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switch (prop_id) {
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case PROP_HAS_LOOP:
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sink->has_loop = g_value_get_boolean (value);
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gst_basesink_set_all_pad_functions (sink);
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break;
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case PROP_HAS_CHAIN:
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sink->has_chain = g_value_get_boolean (value);
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gst_basesink_set_all_pad_functions (sink);
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break;
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case PROP_PREROLL_QUEUE_LEN:
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/* preroll lock necessary to serialize with finish_preroll */
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GST_PREROLL_LOCK (sink->sinkpad);
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sink->preroll_queue_max_len = g_value_get_uint (value);
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GST_PREROLL_UNLOCK (sink->sinkpad);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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GST_UNLOCK (sink);
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}
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static void
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gst_basesink_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstBaseSink *sink;
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sink = GST_BASESINK (object);
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GST_LOCK (sink);
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switch (prop_id) {
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case PROP_HAS_LOOP:
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g_value_set_boolean (value, sink->has_loop);
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break;
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case PROP_HAS_CHAIN:
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g_value_set_boolean (value, sink->has_chain);
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break;
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case PROP_PREROLL_QUEUE_LEN:
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g_value_set_uint (value, sink->preroll_queue_max_len);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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GST_UNLOCK (sink);
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}
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static GstCaps *
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gst_base_sink_get_caps (GstBaseSink * sink)
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{
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return NULL;
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}
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static gboolean
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gst_base_sink_set_caps (GstBaseSink * sink, GstCaps * caps)
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{
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return TRUE;
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}
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static GstBuffer *
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gst_base_sink_buffer_alloc (GstBaseSink * sink, guint64 offset, guint size,
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GstCaps * caps)
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{
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return NULL;
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}
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/* with PREROLL_LOCK */
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static void
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gst_basesink_preroll_queue_push (GstBaseSink * basesink, GstPad * pad,
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GstBuffer * buffer)
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{
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if (basesink->preroll_queue->length == 0) {
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GstBaseSinkClass *bclass = GST_BASESINK_GET_CLASS (basesink);
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if (bclass->preroll)
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bclass->preroll (basesink, buffer);
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}
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if (basesink->preroll_queue->length < basesink->preroll_queue_max_len) {
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DEBUG ("push %p %p\n", basesink, buffer);
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g_queue_push_tail (basesink->preroll_queue, buffer);
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} else {
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/* block until the state changes, or we get a flush, or something */
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DEBUG ("block %p %p\n", basesink, buffer);
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GST_DEBUG ("element %s waiting to finish preroll",
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GST_ELEMENT_NAME (basesink));
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basesink->need_preroll = FALSE;
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basesink->have_preroll = TRUE;
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GST_PREROLL_WAIT (pad);
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GST_DEBUG ("done preroll");
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basesink->have_preroll = FALSE;
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}
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}
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/* with PREROLL_LOCK */
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static GstFlowReturn
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gst_basesink_preroll_queue_empty (GstBaseSink * basesink, GstPad * pad)
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{
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GstBuffer *buf;
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GQueue *q = basesink->preroll_queue;
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GstFlowReturn ret;
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ret = GST_FLOW_OK;
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if (q) {
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DEBUG ("empty queue\n");
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while ((buf = g_queue_pop_head (q))) {
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DEBUG ("pop %p\n", buf);
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ret = gst_basesink_handle_buffer (basesink, buf);
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}
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DEBUG ("queue len %p %d\n", basesink, q->length);
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}
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return ret;
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}
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/* with PREROLL_LOCK */
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static void
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gst_basesink_preroll_queue_flush (GstBaseSink * basesink)
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{
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GstBuffer *buf;
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GQueue *q = basesink->preroll_queue;
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DEBUG ("flush %p\n", basesink);
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if (q) {
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while ((buf = g_queue_pop_head (q))) {
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DEBUG ("pop %p\n", buf);
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gst_buffer_unref (buf);
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}
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}
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}
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typedef enum
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{
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PREROLL_QUEUEING,
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PREROLL_PLAYING,
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PREROLL_FLUSHING,
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PREROLL_ERROR
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} PrerollReturn;
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/* with STREAM_LOCK */
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PrerollReturn
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gst_basesink_finish_preroll (GstBaseSink * basesink, GstPad * pad,
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GstBuffer * buffer)
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{
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gboolean usable;
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DEBUG ("finish preroll %p <\n", basesink);
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/* lock order is important */
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GST_STATE_LOCK (basesink);
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GST_PREROLL_LOCK (pad);
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DEBUG ("finish preroll %p >\n", basesink);
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if (!basesink->need_preroll)
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goto no_preroll;
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gst_element_commit_state (GST_ELEMENT (basesink));
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GST_STATE_UNLOCK (basesink);
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GST_LOCK (pad);
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usable = !GST_RPAD_IS_FLUSHING (pad) && GST_RPAD_IS_ACTIVE (pad);
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GST_UNLOCK (pad);
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if (!usable)
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goto unusable;
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gst_basesink_preroll_queue_push (basesink, pad, buffer);
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if (basesink->need_preroll)
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goto still_queueing;
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GST_DEBUG ("done preroll");
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gst_basesink_preroll_queue_empty (basesink, pad);
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|
|
GST_PREROLL_UNLOCK (pad);
|
|
|
|
return PREROLL_PLAYING;
|
|
|
|
no_preroll:
|
|
{
|
|
/* maybe it was another sink that blocked in preroll, need to check for
|
|
buffers to drain */
|
|
if (basesink->preroll_queue->length)
|
|
gst_basesink_preroll_queue_empty (basesink, pad);
|
|
GST_PREROLL_UNLOCK (pad);
|
|
GST_STATE_UNLOCK (basesink);
|
|
return PREROLL_PLAYING;
|
|
}
|
|
unusable:
|
|
{
|
|
GST_DEBUG ("pad is flushing");
|
|
GST_PREROLL_UNLOCK (pad);
|
|
return PREROLL_FLUSHING;
|
|
}
|
|
still_queueing:
|
|
{
|
|
GST_PREROLL_UNLOCK (pad);
|
|
return PREROLL_QUEUEING;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_basesink_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstBaseSink *basesink;
|
|
gboolean result = TRUE;
|
|
GstBaseSinkClass *bclass;
|
|
|
|
basesink = GST_BASESINK (GST_OBJECT_PARENT (pad));
|
|
|
|
bclass = GST_BASESINK_GET_CLASS (basesink);
|
|
|
|
DEBUG ("event %p\n", basesink);
|
|
|
|
if (bclass->event)
|
|
bclass->event (basesink, event);
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_EOS:
|
|
{
|
|
gboolean need_eos;
|
|
|
|
GST_STREAM_LOCK (pad);
|
|
|
|
/* EOS also finishes the preroll */
|
|
gst_basesink_finish_preroll (basesink, pad, NULL);
|
|
|
|
GST_LOCK (basesink);
|
|
need_eos = basesink->eos = TRUE;
|
|
if (basesink->clock) {
|
|
/* wait for last buffer to finish if we have a valid end time */
|
|
if (GST_CLOCK_TIME_IS_VALID (basesink->end_time)) {
|
|
basesink->clock_id = gst_clock_new_single_shot_id (basesink->clock,
|
|
basesink->end_time + GST_ELEMENT (basesink)->base_time);
|
|
GST_UNLOCK (basesink);
|
|
|
|
gst_clock_id_wait (basesink->clock_id, NULL);
|
|
|
|
GST_LOCK (basesink);
|
|
if (basesink->clock_id) {
|
|
gst_clock_id_unref (basesink->clock_id);
|
|
basesink->clock_id = NULL;
|
|
}
|
|
basesink->end_time = GST_CLOCK_TIME_NONE;
|
|
need_eos = basesink->eos;
|
|
}
|
|
GST_UNLOCK (basesink);
|
|
|
|
/* if we are still EOS, we can post the EOS message */
|
|
if (need_eos) {
|
|
/* ok, now we can post the message */
|
|
gst_element_post_message (GST_ELEMENT (basesink),
|
|
gst_message_new_eos (GST_OBJECT (basesink)));
|
|
}
|
|
}
|
|
GST_STREAM_UNLOCK (pad);
|
|
break;
|
|
}
|
|
case GST_EVENT_DISCONTINUOUS:
|
|
GST_STREAM_LOCK (pad);
|
|
if (basesink->clock) {
|
|
//gint64 value = GST_EVENT_DISCONT_OFFSET (event, 0).value;
|
|
}
|
|
GST_STREAM_UNLOCK (pad);
|
|
break;
|
|
case GST_EVENT_FLUSH:
|
|
/* make sure we are not blocked on the clock also clear any pending
|
|
* eos state. */
|
|
if (!GST_EVENT_FLUSH_DONE (event)) {
|
|
GST_LOCK (basesink);
|
|
basesink->eos = FALSE;
|
|
if (basesink->clock_id) {
|
|
gst_clock_id_unschedule (basesink->clock_id);
|
|
}
|
|
GST_UNLOCK (basesink);
|
|
|
|
/* unlock from a possible state change/preroll */
|
|
GST_PREROLL_LOCK (pad);
|
|
basesink->need_preroll = TRUE;
|
|
gst_basesink_preroll_queue_flush (basesink);
|
|
GST_PREROLL_SIGNAL (pad);
|
|
GST_PREROLL_UNLOCK (pad);
|
|
}
|
|
/* now we are completely unblocked and the _chain method
|
|
* will return */
|
|
break;
|
|
default:
|
|
result = gst_pad_event_default (pad, event);
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* default implementation to calculate the start and end
|
|
* timestamps on a buffer, subclasses cna override
|
|
*/
|
|
static void
|
|
gst_basesink_get_times (GstBaseSink * basesink, GstBuffer * buffer,
|
|
GstClockTime * start, GstClockTime * end)
|
|
{
|
|
GstClockTime timestamp, duration;
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
|
|
duration = GST_BUFFER_DURATION (buffer);
|
|
if (GST_CLOCK_TIME_IS_VALID (duration)) {
|
|
*end = timestamp + duration;
|
|
}
|
|
*start = timestamp;
|
|
}
|
|
}
|
|
|
|
/* perform synchronisation on a buffer
|
|
*
|
|
* 1) check if we have a clock, if not, do nothing
|
|
* 2) calculate the start and end time of the buffer
|
|
* 3) create a single shot notification to wait on
|
|
* the clock, save the entry so we can unlock it
|
|
* 4) wait on the clock, this blocks
|
|
* 5) unref the clockid again
|
|
*/
|
|
static void
|
|
gst_basesink_do_sync (GstBaseSink * basesink, GstBuffer * buffer)
|
|
{
|
|
if (basesink->clock) {
|
|
GstClockReturn ret;
|
|
GstClockTime start, end;
|
|
GstBaseSinkClass *bclass;
|
|
|
|
bclass = GST_BASESINK_GET_CLASS (basesink);
|
|
start = end = -1;
|
|
if (bclass->get_times)
|
|
bclass->get_times (basesink, buffer, &start, &end);
|
|
|
|
GST_DEBUG_OBJECT (basesink, "got times start: %" GST_TIME_FORMAT
|
|
", end: %" GST_TIME_FORMAT, GST_TIME_ARGS (start), GST_TIME_ARGS (end));
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (start)) {
|
|
/* save clock id so that we can unlock it if needed */
|
|
GST_LOCK (basesink);
|
|
basesink->clock_id = gst_clock_new_single_shot_id (basesink->clock,
|
|
start + GST_ELEMENT (basesink)->base_time);
|
|
basesink->end_time = end;
|
|
GST_UNLOCK (basesink);
|
|
|
|
ret = gst_clock_id_wait (basesink->clock_id, NULL);
|
|
|
|
GST_LOCK (basesink);
|
|
if (basesink->clock_id) {
|
|
gst_clock_id_unref (basesink->clock_id);
|
|
basesink->clock_id = NULL;
|
|
}
|
|
/* FIXME, don't mess with end_time here */
|
|
basesink->end_time = GST_CLOCK_TIME_NONE;
|
|
GST_UNLOCK (basesink);
|
|
|
|
GST_LOG_OBJECT (basesink, "clock entry done: %d", ret);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* handle a buffer
|
|
*
|
|
* 1) first sync on the buffer
|
|
* 2) render the buffer
|
|
* 3) unref the buffer
|
|
*/
|
|
static inline GstFlowReturn
|
|
gst_basesink_handle_buffer (GstBaseSink * basesink, GstBuffer * buf)
|
|
{
|
|
GstBaseSinkClass *bclass;
|
|
GstFlowReturn ret;
|
|
|
|
gst_basesink_do_sync (basesink, buf);
|
|
|
|
bclass = GST_BASESINK_GET_CLASS (basesink);
|
|
if (bclass->render)
|
|
ret = bclass->render (basesink, buf);
|
|
else
|
|
ret = GST_FLOW_OK;
|
|
|
|
DEBUG ("unref %p %p\n", basesink, buf);
|
|
gst_buffer_unref (buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_basesink_chain_unlocked (GstPad * pad, GstBuffer * buf)
|
|
{
|
|
GstBaseSink *basesink;
|
|
PrerollReturn result;
|
|
|
|
basesink = GST_BASESINK (GST_OBJECT_PARENT (pad));
|
|
|
|
DEBUG ("chain_unlocked %p\n", basesink);
|
|
|
|
result = gst_basesink_finish_preroll (basesink, pad, buf);
|
|
|
|
DEBUG ("chain_unlocked %p after, result %d\n", basesink, result);
|
|
|
|
switch (result) {
|
|
case PREROLL_QUEUEING:
|
|
return GST_FLOW_OK;
|
|
case PREROLL_PLAYING:
|
|
return gst_basesink_handle_buffer (basesink, buf);
|
|
case PREROLL_FLUSHING:
|
|
gst_buffer_unref (buf);
|
|
return GST_FLOW_UNEXPECTED;
|
|
default:
|
|
g_assert_not_reached ();
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_basesink_chain (GstPad * pad, GstBuffer * buf)
|
|
{
|
|
GstFlowReturn result;
|
|
|
|
g_assert (GST_BASESINK (GST_OBJECT_PARENT (pad))->pad_mode ==
|
|
GST_ACTIVATE_PUSH);
|
|
|
|
GST_STREAM_LOCK (pad);
|
|
|
|
result = gst_basesink_chain_unlocked (pad, buf);
|
|
|
|
GST_STREAM_UNLOCK (pad);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* FIXME, not all sinks can operate in pull mode
|
|
*/
|
|
static void
|
|
gst_basesink_loop (GstPad * pad)
|
|
{
|
|
GstBaseSink *basesink;
|
|
GstBuffer *buf = NULL;
|
|
GstFlowReturn result;
|
|
|
|
basesink = GST_BASESINK (GST_OBJECT_PARENT (pad));
|
|
|
|
g_assert (basesink->pad_mode == GST_ACTIVATE_PULL);
|
|
|
|
GST_STREAM_LOCK (pad);
|
|
|
|
result = gst_pad_pull_range (pad, basesink->offset, DEFAULT_SIZE, &buf);
|
|
if (result != GST_FLOW_OK)
|
|
goto paused;
|
|
|
|
result = gst_basesink_chain_unlocked (pad, buf);
|
|
if (result != GST_FLOW_OK)
|
|
goto paused;
|
|
|
|
/* default */
|
|
GST_STREAM_UNLOCK (pad);
|
|
return;
|
|
|
|
paused:
|
|
gst_task_pause (GST_RPAD_TASK (pad));
|
|
GST_STREAM_UNLOCK (pad);
|
|
return;
|
|
}
|
|
|
|
static gboolean
|
|
gst_basesink_activate (GstPad * pad, GstActivateMode mode)
|
|
{
|
|
gboolean result = FALSE;
|
|
GstBaseSink *basesink;
|
|
GstBaseSinkClass *bclass;
|
|
|
|
basesink = GST_BASESINK (GST_OBJECT_PARENT (pad));
|
|
bclass = GST_BASESINK_GET_CLASS (basesink);
|
|
|
|
switch (mode) {
|
|
case GST_ACTIVATE_PUSH:
|
|
g_return_val_if_fail (basesink->has_chain, FALSE);
|
|
result = TRUE;
|
|
break;
|
|
case GST_ACTIVATE_PULL:
|
|
/* if we have a scheduler we can start the task */
|
|
g_return_val_if_fail (basesink->has_loop, FALSE);
|
|
gst_pad_peer_set_active (pad, mode);
|
|
if (GST_ELEMENT_SCHEDULER (basesink)) {
|
|
GST_STREAM_LOCK (pad);
|
|
GST_RPAD_TASK (pad) =
|
|
gst_scheduler_create_task (GST_ELEMENT_SCHEDULER (basesink),
|
|
(GstTaskFunction) gst_basesink_loop, pad);
|
|
|
|
gst_task_start (GST_RPAD_TASK (pad));
|
|
GST_STREAM_UNLOCK (pad);
|
|
result = TRUE;
|
|
}
|
|
break;
|
|
case GST_ACTIVATE_NONE:
|
|
/* step 1, unblock clock sync (if any) or any other blocking thing */
|
|
GST_LOCK (basesink);
|
|
if (basesink->clock_id) {
|
|
gst_clock_id_unschedule (basesink->clock_id);
|
|
}
|
|
GST_UNLOCK (basesink);
|
|
|
|
/* unlock any subclasses */
|
|
if (bclass->unlock)
|
|
bclass->unlock (basesink);
|
|
|
|
/* unlock preroll */
|
|
GST_PREROLL_LOCK (pad);
|
|
GST_PREROLL_SIGNAL (pad);
|
|
GST_PREROLL_UNLOCK (pad);
|
|
|
|
/* step 2, make sure streaming finishes */
|
|
GST_STREAM_LOCK (pad);
|
|
/* step 3, stop the task */
|
|
if (GST_RPAD_TASK (pad)) {
|
|
gst_task_stop (GST_RPAD_TASK (pad));
|
|
gst_object_unref (GST_OBJECT (GST_RPAD_TASK (pad)));
|
|
GST_RPAD_TASK (pad) = NULL;
|
|
}
|
|
GST_STREAM_UNLOCK (pad);
|
|
|
|
result = TRUE;
|
|
break;
|
|
}
|
|
basesink->pad_mode = mode;
|
|
|
|
return result;
|
|
}
|
|
|
|
static GstElementStateReturn
|
|
gst_basesink_change_state (GstElement * element)
|
|
{
|
|
GstElementStateReturn ret = GST_STATE_SUCCESS;
|
|
GstBaseSink *basesink = GST_BASESINK (element);
|
|
GstElementState transition = GST_STATE_TRANSITION (element);
|
|
|
|
DEBUG ("state change > %p %x\n", basesink, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_READY_TO_PAUSED:
|
|
/* need to complete preroll before this state change completes, there
|
|
* is no data flow in READY so we can safely assume we need to preroll. */
|
|
basesink->offset = 0;
|
|
GST_PREROLL_LOCK (basesink->sinkpad);
|
|
basesink->need_preroll = TRUE;
|
|
basesink->have_preroll = FALSE;
|
|
GST_PREROLL_UNLOCK (basesink->sinkpad);
|
|
ret = GST_STATE_ASYNC;
|
|
break;
|
|
case GST_STATE_PAUSED_TO_PLAYING:
|
|
GST_PREROLL_LOCK (basesink->sinkpad);
|
|
if (basesink->have_preroll) {
|
|
/* now let it play */
|
|
GST_PREROLL_SIGNAL (basesink->sinkpad);
|
|
} else {
|
|
/* FIXME. We do not have a preroll and we don't need it anymore
|
|
* now, this is a case we want to avoid. One way would be to make
|
|
* a 'lost state' function that makes get_state return PAUSED with
|
|
* ASYNC to indicate that we are prerolling again. */
|
|
basesink->need_preroll = FALSE;
|
|
}
|
|
GST_PREROLL_UNLOCK (basesink->sinkpad);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
GST_ELEMENT_CLASS (parent_class)->change_state (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_PLAYING_TO_PAUSED:
|
|
{
|
|
gboolean eos;
|
|
|
|
/* unlock clock wait if any */
|
|
GST_LOCK (basesink);
|
|
if (basesink->clock_id) {
|
|
gst_clock_id_unschedule (basesink->clock_id);
|
|
}
|
|
eos = basesink->eos;
|
|
GST_UNLOCK (basesink);
|
|
|
|
GST_PREROLL_LOCK (basesink->sinkpad);
|
|
/* if we don't have a preroll buffer and we have not received EOS,
|
|
* we need to wait for a preroll */
|
|
if (!basesink->have_preroll && !eos) {
|
|
basesink->need_preroll = TRUE;
|
|
ret = GST_STATE_ASYNC;
|
|
}
|
|
GST_PREROLL_UNLOCK (basesink->sinkpad);
|
|
break;
|
|
}
|
|
case GST_STATE_PAUSED_TO_READY:
|
|
/* flush out the data thread if it's locked in finish_preroll */
|
|
GST_PREROLL_LOCK (basesink->sinkpad);
|
|
|
|
gst_basesink_preroll_queue_flush (basesink);
|
|
|
|
if (basesink->have_preroll)
|
|
GST_PREROLL_SIGNAL (basesink->sinkpad);
|
|
|
|
basesink->need_preroll = FALSE;
|
|
basesink->have_preroll = FALSE;
|
|
GST_PREROLL_UNLOCK (basesink->sinkpad);
|
|
|
|
/* make sure the element is finished processing */
|
|
GST_STREAM_LOCK (basesink->sinkpad);
|
|
GST_STREAM_UNLOCK (basesink->sinkpad);
|
|
/* clear EOS state */
|
|
basesink->eos = FALSE;
|
|
break;
|
|
case GST_STATE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
DEBUG ("state change < %p %x\n", basesink, transition);
|
|
return ret;
|
|
}
|