Commit dc9c3f54 authored by Wim Taymans's avatar Wim Taymans

gst/autodetect/gstautovideosink.*: Fix docs.

Original commit message from CVS:
* gst/autodetect/gstautovideosink.c:
(gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose),
(gst_auto_video_sink_init),
(gst_auto_video_sink_create_element_with_pretty_name),
(gst_auto_video_sink_find_best),
(gst_auto_video_sink_set_property),
(gst_auto_video_sink_get_property):
* gst/autodetect/gstautovideosink.h:
Fix docs.
Use same error reporting code as autoaudiosink.
Add property to filter sinks based on caps. Only select raw video sinks
by default for backwards compat.
API: GstAutoVideoSink::filter-caps
parent 619ee506
2007-12-05 Wim Taymans <wim.taymans@gmail.com>
* gst/autodetect/gstautovideosink.c:
(gst_auto_video_sink_class_init), (gst_auto_video_sink_dispose),
(gst_auto_video_sink_init),
(gst_auto_video_sink_create_element_with_pretty_name),
(gst_auto_video_sink_find_best),
(gst_auto_video_sink_set_property),
(gst_auto_video_sink_get_property):
* gst/autodetect/gstautovideosink.h:
Fix docs.
Use same error reporting code as autoaudiosink.
Add property to filter sinks based on caps. Only select raw video sinks
by default for backwards compat.
API: GstAutoVideoSink::filter-caps
2007-12-05 Wim Taymans <wim.taymans@gmail.com>
Patch by: Tommi Myöhänen <ext-tommi dot myohanen at nokia dot com>
......
......@@ -26,7 +26,7 @@
* <para>
* autovideosink is a video sink that automatically detects an appropriate
* video sink to use. It does so by scanning the registry for all elements
* that have <quote>Sink</quote> and <quote>Audio</quote> in the class field
* that have <quote>Sink</quote> and <quote>Video</quote> in the class field
* of their element information, and also have a non-zero autoplugging rank.
* </para>
* <title>Example launch line</title>
......@@ -47,12 +47,24 @@
#include "gstautovideosink.h"
#include "gstautodetect.h"
/* Properties */
enum
{
PROP_0,
PROP_CAPS,
};
static GstStateChangeReturn
gst_auto_video_sink_change_state (GstElement * element,
GstStateChange transition);
static void gst_auto_video_sink_dispose (GstAutoVideoSink * sink);
static void gst_auto_video_sink_clear_kid (GstAutoVideoSink * sink);
static void gst_auto_video_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_auto_video_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
GST_BOILERPLATE (GstAutoVideoSink, gst_auto_video_sink, GstBin, GST_TYPE_BIN);
static const GstElementDetails gst_auto_video_sink_details =
......@@ -87,6 +99,26 @@ gst_auto_video_sink_class_init (GstAutoVideoSinkClass * klass)
gobject_class->dispose =
(GObjectFinalizeFunc) GST_DEBUG_FUNCPTR (gst_auto_video_sink_dispose);
eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_video_sink_change_state);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_auto_video_sink_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_auto_video_sink_get_property);
/**
* GstAutoVideoSink:filter-caps
*
* This property will filter out candidate sinks that can handle the specified
* caps. By default only video sinks that support raw rgb and yuv video
* are selected.
*
* This property can only be set before the element goes to the READY state.
*
* Since: 0.10.7
**/
g_object_class_install_property (gobject_class, PROP_CAPS,
g_param_spec_boxed ("filter-caps", "Filter caps",
"Filter sink candidates using these caps.", GST_TYPE_CAPS,
G_PARAM_READWRITE));
}
static void
......@@ -94,6 +126,10 @@ gst_auto_video_sink_dispose (GstAutoVideoSink * sink)
{
gst_auto_video_sink_clear_kid (sink);
if (sink->filter_caps)
gst_caps_unref (sink->filter_caps);
sink->filter_caps = NULL;
G_OBJECT_CLASS (parent_class)->dispose ((GObject *) sink);
}
......@@ -130,6 +166,9 @@ gst_auto_video_sink_reset (GstAutoVideoSink * sink)
gst_object_unref (targetpad);
}
static GstStaticCaps raw_caps =
GST_STATIC_CAPS ("video/x-raw-yuv; video/x-raw-rgb");
static void
gst_auto_video_sink_init (GstAutoVideoSink * sink,
GstAutoVideoSinkClass * g_class)
......@@ -139,6 +178,10 @@ gst_auto_video_sink_init (GstAutoVideoSink * sink,
gst_auto_video_sink_reset (sink);
/* set the default raw video caps */
sink->filter_caps = gst_static_caps_get (&raw_caps);
/* mark as sink */
GST_OBJECT_FLAG_SET (sink, GST_ELEMENT_IS_SINK);
}
......@@ -177,48 +220,118 @@ gst_auto_video_sink_compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
gst_plugin_feature_get_name (f1));
}
static GstElement *
gst_auto_video_sink_create_element_with_pretty_name (GstAutoVideoSink * sink,
GstElementFactory * factory)
{
GstElement *element;
gchar *name, *marker;
marker = g_strdup (GST_PLUGIN_FEATURE (factory)->name);
if (g_str_has_suffix (marker, "sink"))
marker[strlen (marker) - 4] = '\0';
if (g_str_has_prefix (marker, "gst"))
g_memmove (marker, marker + 3, strlen (marker + 3) + 1);
name = g_strdup_printf ("%s-actual-sink-%s", GST_OBJECT_NAME (sink), marker);
g_free (marker);
element = gst_element_factory_create (factory, name);
g_free (name);
return element;
}
static GstElement *
gst_auto_video_sink_find_best (GstAutoVideoSink * sink)
{
GList *list, *item;
GstElement *choice = NULL;
GList *list, *walk;
gchar *child_name = g_strdup_printf ("%s-actual-sink",
GST_OBJECT_NAME (sink));
GstMessage *message = NULL;
GSList *errors = NULL;
GstBus *bus = gst_bus_new ();
GstPad *el_pad = NULL;
GstCaps *el_caps = NULL, *intersect = NULL;
gboolean no_match = TRUE;
list = gst_registry_feature_filter (gst_registry_get_default (),
(GstPluginFeatureFilter) gst_auto_video_sink_factory_filter, FALSE, sink);
list = g_list_sort (list, (GCompareFunc) gst_auto_video_sink_compare_ranks);
for (walk = list; walk != NULL; walk = walk->next) {
GstElementFactory *f = GST_ELEMENT_FACTORY (walk->data);
GST_LOG_OBJECT (sink, "Trying to find usable video devices ...");
for (item = list; item != NULL; item = item->next) {
GstElementFactory *f = GST_ELEMENT_FACTORY (item->data);
GstElement *el;
GST_DEBUG_OBJECT (sink, "Trying %s", GST_PLUGIN_FEATURE (f)->name);
if ((el = gst_element_factory_create (f, child_name))) {
if ((el = gst_auto_video_sink_create_element_with_pretty_name (sink, f))) {
GstStateChangeReturn ret;
GST_DEBUG_OBJECT (sink, "Changing state to READY");
GST_DEBUG_OBJECT (sink, "Testing %s", GST_PLUGIN_FEATURE (f)->name);
/* If autovideosink has been provided with filter caps,
* accept only sinks that match with the filter caps */
if (sink->filter_caps) {
el_pad = gst_element_get_static_pad (GST_ELEMENT (el), "sink");
el_caps = gst_pad_get_caps (el_pad);
gst_object_unref (el_pad);
GST_DEBUG_OBJECT (sink,
"Checking caps: %" GST_PTR_FORMAT " vs. %" GST_PTR_FORMAT,
sink->filter_caps, el_caps);
intersect = gst_caps_intersect (sink->filter_caps, el_caps);
no_match = gst_caps_is_empty (intersect);
gst_caps_unref (el_caps);
gst_caps_unref (intersect);
if (no_match) {
GST_DEBUG_OBJECT (sink, "Incompatible caps");
gst_object_unref (el);
continue;
} else {
GST_DEBUG_OBJECT (sink, "Found compatible caps");
}
}
gst_element_set_bus (el, bus);
ret = gst_element_set_state (el, GST_STATE_READY);
if (ret == GST_STATE_CHANGE_SUCCESS) {
GST_DEBUG_OBJECT (sink, "success");
GST_DEBUG_OBJECT (sink, "This worked!");
choice = el;
goto done;
break;
}
GST_WARNING_OBJECT (sink, "Couldn't set READY: %d", ret);
ret = gst_element_set_state (el, GST_STATE_NULL);
if (ret != GST_STATE_CHANGE_SUCCESS)
GST_WARNING_OBJECT (sink,
"Couldn't set element to NULL prior to disposal.");
/* collect all error messages */
while ((message = gst_bus_pop_filtered (bus, GST_MESSAGE_ERROR))) {
GST_DEBUG_OBJECT (sink, "error message %" GST_PTR_FORMAT, message);
errors = g_slist_append (errors, message);
}
gst_element_set_state (el, GST_STATE_NULL);
gst_object_unref (el);
}
}
done:
g_free (child_name);
GST_DEBUG_OBJECT (sink, "done trying");
if (!choice) {
if (errors) {
/* FIXME: we forward the first error for now; but later on it might make
* sense to actually analyse them */
gst_message_ref (GST_MESSAGE (errors->data));
GST_DEBUG_OBJECT (sink, "reposting message %p", errors->data);
gst_element_post_message (GST_ELEMENT (sink), GST_MESSAGE (errors->data));
} else {
/* send warning message to application and use a fakesink */
GST_ELEMENT_WARNING (sink, RESOURCE, NOT_FOUND, (NULL),
("Failed to find a usable video sink"));
choice = gst_element_factory_make ("fakesink", "fake-video-sink");
if (g_object_class_find_property (G_OBJECT_GET_CLASS (choice), "sync"))
g_object_set (choice, "sync", TRUE, NULL);
gst_element_set_state (choice, GST_STATE_READY);
}
}
gst_object_unref (bus);
gst_plugin_feature_list_free (list);
g_slist_foreach (errors, (GFunc) gst_mini_object_unref, NULL);
g_slist_free (errors);
return choice;
}
......@@ -285,3 +398,38 @@ gst_auto_video_sink_change_state (GstElement * element,
return ret;
}
static void
gst_auto_video_sink_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAutoVideoSink *sink = GST_AUTO_VIDEO_SINK (object);
switch (prop_id) {
case PROP_CAPS:
if (sink->filter_caps)
gst_caps_unref (sink->filter_caps);
sink->filter_caps = gst_caps_copy (gst_value_get_caps (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_auto_video_sink_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAutoVideoSink *sink = GST_AUTO_VIDEO_SINK (object);
switch (prop_id) {
case PROP_CAPS:{
gst_value_set_caps (value, sink->filter_caps);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
......@@ -43,6 +43,7 @@ typedef struct _GstAutoVideoSink {
/* explicit pointers to stuff used */
GstPad *pad;
GstElement *kid;
GstCaps *filter_caps;
} GstAutoVideoSink;
typedef struct _GstAutoVideoSinkClass {
......
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