gstreamer/gst/playback/gststreamselector.c
2011-05-18 17:23:18 +02:00

690 lines
20 KiB
C

/* GStreamer
* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
* Copyright (C) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2005 Jan Schmidt <thaytan@mad.scientist.com>
* Copyright (C) 2007 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gststreamselector.h"
GST_DEBUG_CATEGORY_STATIC (stream_selector_debug);
#define GST_CAT_DEFAULT stream_selector_debug
static GstStaticPadTemplate gst_stream_selector_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink%d",
GST_PAD_SINK,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate gst_stream_selector_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
enum
{
PROP_0,
PROP_N_PADS,
PROP_ACTIVE_PAD,
PROP_LAST
};
static gboolean gst_stream_selector_is_active_sinkpad (GstStreamSelector * sel,
GstPad * pad);
static GstPad *gst_stream_selector_activate_sinkpad (GstStreamSelector * sel,
GstPad * pad);
static GstPad *gst_stream_selector_get_linked_pad (GstPad * pad,
gboolean strict);
#define GST_TYPE_SELECTOR_PAD \
(gst_selector_pad_get_type())
#define GST_SELECTOR_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SELECTOR_PAD, GstSelectorPad))
#define GST_SELECTOR_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_SELECTOR_PAD, GstSelectorPadClass))
#define GST_IS_SELECTOR_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SELECTOR_PAD))
#define GST_IS_SELECTOR_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_SELECTOR_PAD))
#define GST_SELECTOR_PAD_CAST(obj) \
((GstSelectorPad *)(obj))
typedef struct _GstSelectorPad GstSelectorPad;
typedef struct _GstSelectorPadClass GstSelectorPadClass;
struct _GstSelectorPad
{
GstPad parent;
gboolean active;
gboolean eos;
gboolean segment_pending;
GstSegment segment;
GstTagList *tags;
};
struct _GstSelectorPadClass
{
GstPadClass parent;
};
static void gst_selector_pad_class_init (GstSelectorPadClass * klass);
static void gst_selector_pad_init (GstSelectorPad * pad);
static void gst_selector_pad_finalize (GObject * object);
static void gst_selector_pad_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstPadClass *selector_pad_parent_class = NULL;
static void gst_selector_pad_reset (GstSelectorPad * pad);
static gboolean gst_selector_pad_event (GstPad * pad, GstEvent * event);
static GstCaps *gst_selector_pad_getcaps (GstPad * pad, GstCaps * filter);
static GstFlowReturn gst_selector_pad_chain (GstPad * pad, GstBuffer * buf);
enum
{
PROP_PAD_0,
PROP_PAD_TAGS,
PROP_PAD_ACTIVE,
PROP_PAD_LAST
};
static GType
gst_selector_pad_get_type (void)
{
static GType selector_pad_type = 0;
if (!selector_pad_type) {
static const GTypeInfo selector_pad_info = {
sizeof (GstSelectorPadClass),
NULL,
NULL,
(GClassInitFunc) gst_selector_pad_class_init,
NULL,
NULL,
sizeof (GstSelectorPad),
0,
(GInstanceInitFunc) gst_selector_pad_init,
};
selector_pad_type =
g_type_register_static (GST_TYPE_PAD, "GstPlaybinSelectorPad",
&selector_pad_info, 0);
}
return selector_pad_type;
}
static void
gst_selector_pad_class_init (GstSelectorPadClass * klass)
{
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
selector_pad_parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gst_selector_pad_finalize;
gobject_class->get_property = gst_selector_pad_get_property;
g_object_class_install_property (gobject_class, PROP_PAD_TAGS,
g_param_spec_boxed ("tags", "Tags",
"The currently active tags on the pad", GST_TYPE_TAG_LIST,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PAD_ACTIVE,
g_param_spec_boolean ("active", "Active",
"If the pad is currently active", FALSE,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
}
static void
gst_selector_pad_init (GstSelectorPad * pad)
{
gst_selector_pad_reset (pad);
}
static void
gst_selector_pad_finalize (GObject * object)
{
GstSelectorPad *pad;
pad = GST_SELECTOR_PAD_CAST (object);
if (pad->tags)
gst_tag_list_free (pad->tags);
G_OBJECT_CLASS (selector_pad_parent_class)->finalize (object);
}
static void
gst_selector_pad_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstSelectorPad *pad;
pad = GST_SELECTOR_PAD (object);
switch (prop_id) {
case PROP_PAD_TAGS:
GST_OBJECT_LOCK (object);
g_value_set_boxed (value, pad->tags);
GST_OBJECT_UNLOCK (object);
break;
case PROP_PAD_ACTIVE:
{
GstStreamSelector *sel;
sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
g_value_set_boolean (value, gst_stream_selector_is_active_sinkpad (sel,
GST_PAD_CAST (pad)));
gst_object_unref (sel);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_selector_pad_reset (GstSelectorPad * pad)
{
pad->active = FALSE;
pad->eos = FALSE;
gst_segment_init (&pad->segment, GST_FORMAT_UNDEFINED);
}
static gboolean
gst_selector_pad_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
gboolean forward = TRUE;
GstStreamSelector *sel;
GstSelectorPad *selpad;
GstPad *active_sinkpad;
sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
selpad = GST_SELECTOR_PAD_CAST (pad);
/* only forward if we are dealing with the active sinkpad */
active_sinkpad = gst_stream_selector_activate_sinkpad (sel, pad);
forward = (active_sinkpad == pad);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
gst_selector_pad_reset (selpad);
break;
case GST_EVENT_SEGMENT:
{
gst_event_copy_segment (event, &selpad->segment);
GST_DEBUG_OBJECT (selpad, "configured SEGMENT %" GST_SEGMENT_FORMAT,
&selpad->segment);
/* if we are not going to forward the segment, mark the segment as
* pending */
if (!forward)
selpad->segment_pending = TRUE;
break;
}
case GST_EVENT_TAG:
{
GstTagList *tags;
GST_OBJECT_LOCK (selpad);
if (selpad->tags)
gst_tag_list_free (selpad->tags);
gst_event_parse_tag (event, &tags);
if (tags)
tags = gst_tag_list_copy (tags);
selpad->tags = tags;
GST_DEBUG_OBJECT (sel, "received tags %" GST_PTR_FORMAT, selpad->tags);
GST_OBJECT_UNLOCK (selpad);
break;
}
case GST_EVENT_EOS:
selpad->eos = TRUE;
break;
default:
break;
}
if (forward)
res = gst_pad_push_event (sel->srcpad, event);
else
gst_event_unref (event);
gst_object_unref (sel);
return res;
}
static GstCaps *
gst_selector_pad_getcaps (GstPad * pad, GstCaps * filter)
{
GstStreamSelector *sel;
GstCaps *caps;
sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (sel, "Getting caps of srcpad peer");
caps = gst_pad_peer_get_caps (sel->srcpad, filter);
if (caps == NULL)
caps = (filter ? gst_caps_ref (filter) : gst_caps_new_any ());
gst_object_unref (sel);
return caps;
}
static GstFlowReturn
gst_selector_pad_chain (GstPad * pad, GstBuffer * buf)
{
GstStreamSelector *sel;
GstFlowReturn res;
GstPad *active_sinkpad;
GstSelectorPad *selpad;
GstClockTime timestamp;
GstSegment *seg;
sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
selpad = GST_SELECTOR_PAD_CAST (pad);
seg = &selpad->segment;
active_sinkpad = gst_stream_selector_activate_sinkpad (sel, pad);
timestamp = GST_BUFFER_TIMESTAMP (buf);
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
GST_DEBUG_OBJECT (sel, "received timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (timestamp));
seg->position = timestamp;
}
/* Ignore buffers from pads except the selected one */
if (pad != active_sinkpad)
goto ignore;
/* if we have a pending segment, push it out now */
if (selpad->segment_pending) {
gst_pad_push_event (sel->srcpad, gst_event_new_segment (seg));
selpad->segment_pending = FALSE;
}
/* forward */
GST_DEBUG_OBJECT (sel, "Forwarding buffer %p from pad %s:%s", buf,
GST_DEBUG_PAD_NAME (pad));
res = gst_pad_push (sel->srcpad, buf);
done:
gst_object_unref (sel);
return res;
/* dropped buffers */
ignore:
{
GST_DEBUG_OBJECT (sel, "Ignoring buffer %p from pad %s:%s",
buf, GST_DEBUG_PAD_NAME (pad));
gst_buffer_unref (buf);
res = GST_FLOW_NOT_LINKED;
goto done;
}
}
static void gst_stream_selector_dispose (GObject * object);
static void gst_stream_selector_init (GstStreamSelector * sel);
static void gst_stream_selector_base_init (GstStreamSelectorClass * klass);
static void gst_stream_selector_class_init (GstStreamSelectorClass * klass);
static void gst_stream_selector_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_stream_selector_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstPad *gst_stream_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused, const GstCaps * caps);
static void gst_stream_selector_release_pad (GstElement * element,
GstPad * pad);
static GstIterator *gst_stream_selector_pad_iterate_linked_pads (GstPad * pad);
static GstCaps *gst_stream_selector_getcaps (GstPad * pad, GstCaps * filter);
static GstElementClass *parent_class = NULL;
GType
gst_stream_selector_get_type (void)
{
static GType stream_selector_type = 0;
if (!stream_selector_type) {
static const GTypeInfo stream_selector_info = {
sizeof (GstStreamSelectorClass),
(GBaseInitFunc) gst_stream_selector_base_init,
NULL,
(GClassInitFunc) gst_stream_selector_class_init,
NULL,
NULL,
sizeof (GstStreamSelector),
0,
(GInstanceInitFunc) gst_stream_selector_init,
};
stream_selector_type =
g_type_register_static (GST_TYPE_ELEMENT,
"GstStreamSelector", &stream_selector_info, 0);
GST_DEBUG_CATEGORY_INIT (stream_selector_debug,
"streamselector", 0, "A stream-selector element");
}
return stream_selector_type;
}
static void
gst_stream_selector_base_init (GstStreamSelectorClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_set_details_simple (element_class,
"StreamSelector", "Generic",
"N-to-1 input stream_selectoring",
"Julien Moutte <julien@moutte.net>, "
"Jan Schmidt <thaytan@mad.scientist.com>, "
"Wim Taymans <wim.taymans@gmail.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_stream_selector_sink_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_stream_selector_src_factory));
}
static void
gst_stream_selector_class_init (GstStreamSelectorClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
gobject_class->dispose = gst_stream_selector_dispose;
gobject_class->set_property = gst_stream_selector_set_property;
gobject_class->get_property = gst_stream_selector_get_property;
g_object_class_install_property (gobject_class, PROP_N_PADS,
g_param_spec_uint ("n-pads", "Number of Pads",
"The number of sink pads", 0, G_MAXUINT, 0,
G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
g_param_spec_object ("active-pad", "Active Pad",
"The currently active sink pad", GST_TYPE_PAD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
gstelement_class->request_new_pad = gst_stream_selector_request_new_pad;
gstelement_class->release_pad = gst_stream_selector_release_pad;
}
static void
gst_stream_selector_init (GstStreamSelector * sel)
{
sel->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_pad_set_iterate_internal_links_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_pad_iterate_linked_pads));
gst_pad_set_getcaps_function (sel->srcpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_getcaps));
gst_element_add_pad (GST_ELEMENT (sel), sel->srcpad);
/* sinkpad management */
sel->padcount = 0;
sel->active_sinkpad = NULL;
gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
}
static void
gst_stream_selector_dispose (GObject * object)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
if (sel->active_sinkpad) {
gst_object_unref (sel->active_sinkpad);
sel->active_sinkpad = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_stream_selector_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
switch (prop_id) {
case PROP_ACTIVE_PAD:
{
GstPad *pad = NULL;
GstPad **active_pad_p;
pad = g_value_get_object (value);
GST_OBJECT_LOCK (object);
if (pad != sel->active_sinkpad) {
GstSelectorPad *selpad;
selpad = GST_SELECTOR_PAD_CAST (pad);
/* we can only activate pads that have data received */
if (selpad && !selpad->active) {
GST_DEBUG_OBJECT (sel, "No data received on pad %" GST_PTR_FORMAT,
pad);
} else {
active_pad_p = &sel->active_sinkpad;
gst_object_replace ((GstObject **) active_pad_p,
GST_OBJECT_CAST (pad));
GST_DEBUG_OBJECT (sel, "New active pad is %" GST_PTR_FORMAT,
sel->active_sinkpad);
}
}
GST_OBJECT_UNLOCK (object);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_stream_selector_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (object);
switch (prop_id) {
case PROP_N_PADS:
GST_OBJECT_LOCK (object);
g_value_set_uint (value, sel->n_pads);
GST_OBJECT_UNLOCK (object);
break;
case PROP_ACTIVE_PAD:{
GST_OBJECT_LOCK (object);
g_value_set_object (value, sel->active_sinkpad);
GST_OBJECT_UNLOCK (object);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstPad *
gst_stream_selector_get_linked_pad (GstPad * pad, gboolean strict)
{
GstStreamSelector *sel;
GstPad *otherpad = NULL;
sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
GST_OBJECT_LOCK (sel);
if (pad == sel->srcpad)
otherpad = sel->active_sinkpad;
else if (pad == sel->active_sinkpad || !strict)
otherpad = sel->srcpad;
if (otherpad)
gst_object_ref (otherpad);
GST_OBJECT_UNLOCK (sel);
gst_object_unref (sel);
return otherpad;
}
static GstCaps *
gst_stream_selector_getcaps (GstPad * pad, GstCaps * filter)
{
GstPad *otherpad;
GstObject *parent;
GstCaps *caps;
otherpad = gst_stream_selector_get_linked_pad (pad, FALSE);
parent = gst_object_get_parent (GST_OBJECT (pad));
if (!otherpad) {
GST_DEBUG_OBJECT (parent,
"Pad %s:%s not linked, returning ANY", GST_DEBUG_PAD_NAME (pad));
caps = (filter ? gst_caps_ref (filter) : gst_caps_new_any ());
} else {
GST_DEBUG_OBJECT (parent,
"Pad %s:%s is linked (to %s:%s), returning peer caps",
GST_DEBUG_PAD_NAME (pad), GST_DEBUG_PAD_NAME (otherpad));
/* if the peer has caps, use those. If the pad is not linked, this function
* returns NULL and we return ANY */
if (!(caps = gst_pad_peer_get_caps (otherpad, filter)))
caps = (filter ? gst_caps_ref (filter) : gst_caps_new_any ());
gst_object_unref (otherpad);
}
gst_object_unref (parent);
return caps;
}
/* check if the pad is the active sinkpad */
static gboolean
gst_stream_selector_is_active_sinkpad (GstStreamSelector * sel, GstPad * pad)
{
gboolean res;
GST_OBJECT_LOCK (sel);
res = (pad == sel->active_sinkpad);
GST_OBJECT_UNLOCK (sel);
return res;
}
/* Get or create the active sinkpad */
static GstPad *
gst_stream_selector_activate_sinkpad (GstStreamSelector * sel, GstPad * pad)
{
GstPad *active_sinkpad;
GstSelectorPad *selpad;
selpad = GST_SELECTOR_PAD_CAST (pad);
GST_OBJECT_LOCK (sel);
selpad->active = TRUE;
active_sinkpad = sel->active_sinkpad;
if (active_sinkpad == NULL) {
/* first pad we get an alloc on becomes the activated pad by default */
active_sinkpad = sel->active_sinkpad = gst_object_ref (pad);
GST_DEBUG_OBJECT (sel, "Activating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
}
GST_OBJECT_UNLOCK (sel);
return active_sinkpad;
}
static GstIterator *
gst_stream_selector_pad_iterate_linked_pads (GstPad * pad)
{
GstStreamSelector *sel = GST_STREAM_SELECTOR (gst_pad_get_parent (pad));
GValue value = { 0, };
GstPad *otherpad;
GstIterator *ret = NULL;
otherpad = gst_stream_selector_get_linked_pad (pad, TRUE);
if (otherpad) {
g_value_init (&value, GST_TYPE_PAD);
g_value_set_object (&value, otherpad);
ret = gst_iterator_new_single (GST_TYPE_PAD, &value);
g_value_unset (&value);
gst_object_unref (otherpad);
}
gst_object_unref (sel);
return ret;
}
static GstPad *
gst_stream_selector_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * unused, const GstCaps * caps)
{
GstStreamSelector *sel;
gchar *name = NULL;
GstPad *sinkpad = NULL;
sel = GST_STREAM_SELECTOR (element);
g_return_val_if_fail (templ->direction == GST_PAD_SINK, NULL);
GST_LOG_OBJECT (sel, "Creating new pad %d", sel->padcount);
GST_OBJECT_LOCK (sel);
name = g_strdup_printf ("sink%d", sel->padcount++);
sinkpad = g_object_new (GST_TYPE_SELECTOR_PAD,
"name", name, "direction", templ->direction, "template", templ, NULL);
g_free (name);
sel->n_pads++;
GST_OBJECT_UNLOCK (sel);
gst_pad_set_event_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_selector_pad_event));
gst_pad_set_getcaps_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_selector_pad_getcaps));
gst_pad_set_chain_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_selector_pad_chain));
gst_pad_set_iterate_internal_links_function (sinkpad,
GST_DEBUG_FUNCPTR (gst_stream_selector_pad_iterate_linked_pads));
gst_pad_set_active (sinkpad, TRUE);
gst_element_add_pad (GST_ELEMENT (sel), sinkpad);
return sinkpad;
}
static void
gst_stream_selector_release_pad (GstElement * element, GstPad * pad)
{
GstStreamSelector *sel;
sel = GST_STREAM_SELECTOR (element);
GST_LOG_OBJECT (sel, "Releasing pad %s:%s", GST_DEBUG_PAD_NAME (pad));
GST_OBJECT_LOCK (sel);
/* if the pad was the active pad, makes us select a new one */
if (sel->active_sinkpad == pad) {
GST_DEBUG_OBJECT (sel, "Deactivating pad %s:%s", GST_DEBUG_PAD_NAME (pad));
sel->active_sinkpad = NULL;
}
sel->n_pads--;
GST_OBJECT_UNLOCK (sel);
gst_pad_set_active (pad, FALSE);
gst_element_remove_pad (GST_ELEMENT (sel), pad);
}