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gst/autodetect/: Implement src plugins. Little code/string cleanup in the sinks.

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Original commit message from CVS:
* gst/autodetect/Makefile.am:
* gst/autodetect/gstautoaudiosink.c:
* gst/autodetect/gstautoaudiosrc.c:
* gst/autodetect/gstautoaudiosrc.h:
* gst/autodetect/gstautodetect.c:
* gst/autodetect/gstautovideosink.c:
* gst/autodetect/gstautovideosrc.c:
* gst/autodetect/gstautovideosrc.h:
Implement src plugins. Little code/string cleanup in the sinks.
Fixes #523813.
This commit is contained in:
Stefan Kost 2008-10-27 08:54:30 +00:00
parent 40d198cfd8
commit a6f4df463d
9 changed files with 1041 additions and 23 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
ChangeLog
View file

@ -1,3 +1,17 @@
2008-10-27 Stefan Kost <ensonic@users.sf.net>
* gst/autodetect/Makefile.am:
* gst/autodetect/gstautoaudiosink.c:
* gst/autodetect/gstautoaudiosrc.c:
* gst/autodetect/gstautoaudiosrc.h:
* gst/autodetect/gstautodetect.c:
* gst/autodetect/gstautovideosink.c:
* gst/autodetect/gstautovideosrc.c:
* gst/autodetect/gstautovideosrc.h:
Implement src plugins. Little code/string cleanup in the sinks.
Fixes #523813.
2008-10-27 Sebastian Dröge <sebastian.droege@collabora.co.uk>
Patch by: Peter Kjellerstedt <pkj at axis com>

8
gst/autodetect/Makefile.am
View file

@ -2,13 +2,17 @@ plugin_LTLIBRARIES = libgstautodetect.la
libgstautodetect_la_SOURCES = \
gstautoaudiosink.c \
gstautoaudiosrc.c \
gstautodetect.c \
gstautovideosink.c
gstautovideosink.c \
gstautovideosrc.c
libgstautodetect_la_CFLAGS = $(GST_CFLAGS)
libgstautodetect_la_LIBADD = $(GST_LIBS)
libgstautodetect_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = \
gstautoaudiosink.h \
gstautoaudiosrc.h \
gstautodetect.h \
gstautovideosink.h
gstautovideosink.h \
gstautovideosrc.h

26
gst/autodetect/gstautoaudiosink.c
View file

@ -22,19 +22,16 @@
* SECTION:element-autoaudiosink
* @see_also: autovideosink, alsasink, osssink
*
* <refsect2>
* <para>
* autoaudiosink is an audio sink that automatically detects an appropriate
* audio 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
* of their element information, and also have a non-zero autoplugging rank.
* </para>
*
* <refsect2>
* <title>Example launch line</title>
* <para>
* <programlisting>
* |[
* gst-launch -v -m audiotestsrc ! audioconvert ! audioresample ! autoaudiosink
* </programlisting>
* </para>
* ]|
* </refsect2>
*/
@ -71,7 +68,7 @@ GST_ELEMENT_DETAILS ("Auto audio sink",
"Sink/Audio",
"Wrapper audio sink for automatically detected audio sink",
"Ronald Bultje <rbultje@ronald.bitfreak.net>\n"
"Jan Schmidt <thaytan@noraisin.net");
"Jan Schmidt <thaytan@noraisin.net>");
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
@ -349,9 +346,8 @@ gst_auto_audio_sink_detect (GstAutoAudioSink * sink)
/* find element */
GST_DEBUG_OBJECT (sink, "Creating new kid");
if (!(esink = gst_auto_audio_sink_find_best (sink))) {
return FALSE;
}
if (!(esink = gst_auto_audio_sink_find_best (sink)))
goto no_sink;
sink->kid = esink;
/* Ensure the child is brought up to the right state to match the parent
@ -370,6 +366,14 @@ gst_auto_audio_sink_detect (GstAutoAudioSink * sink)
GST_DEBUG_OBJECT (sink, "done changing auto audio sink");
return TRUE;
/* ERRORS */
no_sink:
{
GST_ELEMENT_ERROR (sink, LIBRARY, INIT, (NULL),
("Failed to find a supported audio sink"));
return FALSE;
}
}
static GstStateChangeReturn

444
gst/autodetect/gstautoaudiosrc.c Normal file
View file

@ -0,0 +1,444 @@
/* GStreamer
* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* (c) 2006 Jan Schmidt <thaytan@noraisin.net>
* (c) 2008 Stefan Kost <ensonic@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-autoaudiosrc
* @see_also: autovideosrc, alsasrc, osssrc
*
* autoaudiosrc is an audio source that automatically detects an appropriate
* audio source to use. It does so by scanning the registry for all elements
* that have <quote>Source</quote> and <quote>Audio</quote> in the class field
* of their element information, and also have a non-zero autoplugging rank.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v -m autoaudiosrc ! audioconvert ! audioresample ! autoaudiosink
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstautoaudiosrc.h"
#include "gstautodetect.h"
/* Properties */
enum
{
PROP_0,
PROP_CAPS,
};
static GstStateChangeReturn
gst_auto_audio_src_change_state (GstElement * element,
GstStateChange transition);
static void gst_auto_audio_src_dispose (GstAutoAudioSrc * src);
static void gst_auto_audio_src_clear_kid (GstAutoAudioSrc * src);
static void gst_auto_audio_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_auto_audio_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
GST_BOILERPLATE (GstAutoAudioSrc, gst_auto_audio_src, GstBin, GST_TYPE_BIN);
static const GstElementDetails gst_auto_audio_src_details =
GST_ELEMENT_DETAILS ("Auto audio source",
"Sink/Audio",
"Wrapper audio source for automatically detected audio source",
"Ronald Bultje <rbultje@ronald.bitfreak.net>\n"
"Jan Schmidt <thaytan@noraisin.net>\n"
"Stefan Kost <ensonic@users.sf.net>");
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static void
gst_auto_audio_src_base_init (gpointer klass)
{
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (eklass,
gst_static_pad_template_get (&src_template));
gst_element_class_set_details (eklass, &gst_auto_audio_src_details);
}
static void
gst_auto_audio_src_class_init (GstAutoAudioSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *eklass;
gobject_class = G_OBJECT_CLASS (klass);
eklass = GST_ELEMENT_CLASS (klass);
gobject_class->dispose =
(GObjectFinalizeFunc) GST_DEBUG_FUNCPTR (gst_auto_audio_src_dispose);
eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_audio_src_change_state);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_auto_audio_src_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_auto_audio_src_get_property);
/**
* GstAutoAudioSrc:filter-caps
*
* This property will filter out candidate sinks that can handle the specified
* caps. By default only audio sinks that support raw floating point and
* integer audio are selected.
*
* This property can only be set before the element goes to the READY state.
*
* Since: 0.10.11
**/
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
gst_auto_audio_src_dispose (GstAutoAudioSrc * sink)
{
gst_auto_audio_src_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);
}
static void
gst_auto_audio_src_clear_kid (GstAutoAudioSrc * sink)
{
if (sink->kid) {
gst_element_set_state (sink->kid, GST_STATE_NULL);
gst_bin_remove (GST_BIN (sink), sink->kid);
sink->kid = NULL;
}
}
/*
* Hack to make initial linking work; ideally, this'd work even when
* no target has been assigned to the ghostpad yet.
*/
static void
gst_auto_audio_src_reset (GstAutoAudioSrc * src)
{
GstPad *targetpad;
gst_auto_audio_src_clear_kid (src);
/* fakesink placeholder */
src->kid = gst_element_factory_make ("fakesrc", "tempsrc");
gst_bin_add (GST_BIN (src), src->kid);
/* pad */
targetpad = gst_element_get_static_pad (src->kid, "src");
gst_ghost_pad_set_target (GST_GHOST_PAD (src->pad), targetpad);
gst_object_unref (targetpad);
}
static GstStaticCaps raw_caps =
GST_STATIC_CAPS ("audio/x-raw-int; audio/x-raw-float");
static void
gst_auto_audio_src_init (GstAutoAudioSrc * src, GstAutoAudioSrcClass * g_class)
{
src->pad = gst_ghost_pad_new_no_target ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (src), src->pad);
gst_auto_audio_src_reset (src);
/* set the default raw audio caps */
src->filter_caps = gst_static_caps_get (&raw_caps);
/* mark as source */
GST_OBJECT_FLAG_UNSET (src, GST_ELEMENT_IS_SINK);
}
static gboolean
gst_auto_audio_src_factory_filter (GstPluginFeature * feature, gpointer data)
{
guint rank;
const gchar *klass;
/* we only care about element factories */
if (!GST_IS_ELEMENT_FACTORY (feature))
return FALSE;
/* audio sinks */
klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature));
if (!(strstr (klass, "Source") && strstr (klass, "Audio")))
return FALSE;
/* only select elements with autoplugging rank */
rank = gst_plugin_feature_get_rank (feature);
if (rank < GST_RANK_MARGINAL)
return FALSE;
return TRUE;
}
static gint
gst_auto_audio_src_compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
{
gint diff;
diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
if (diff != 0)
return diff;
return strcmp (gst_plugin_feature_get_name (f2),
gst_plugin_feature_get_name (f1));
}
static GstElement *
gst_auto_audio_src_create_element_with_pretty_name (GstAutoAudioSrc * src,
GstElementFactory * factory)
{
GstElement *element;
gchar *name, *marker;
marker = g_strdup (GST_PLUGIN_FEATURE (factory)->name);
if (g_str_has_suffix (marker, "src"))
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-src-%s", GST_OBJECT_NAME (src), marker);
g_free (marker);
element = gst_element_factory_create (factory, name);
g_free (name);
return element;
}
static GstElement *
gst_auto_audio_src_find_best (GstAutoAudioSrc * src)
{
GList *list, *item;
GstElement *choice = NULL;
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_audio_src_factory_filter, FALSE, src);
list = g_list_sort (list, (GCompareFunc) gst_auto_audio_src_compare_ranks);
/* We don't treat sound server sources special. Our policy is that sound
* server sources that have a rank must not auto-spawn a daemon under any
* circumstances, so there's nothing for us to worry about here */
GST_LOG_OBJECT (src, "Trying to find usable audio devices ...");
for (item = list; item != NULL; item = item->next) {
GstElementFactory *f = GST_ELEMENT_FACTORY (item->data);
GstElement *el;
if ((el = gst_auto_audio_src_create_element_with_pretty_name (src, f))) {
GstStateChangeReturn ret;
GST_DEBUG_OBJECT (src, "Testing %s", GST_PLUGIN_FEATURE (f)->name);
/* If autoAudioSrc has been provided with filter caps,
* accept only sources that match with the filter caps */
if (src->filter_caps) {
el_pad = gst_element_get_static_pad (GST_ELEMENT (el), "src");
el_caps = gst_pad_get_caps (el_pad);
gst_object_unref (el_pad);
GST_DEBUG_OBJECT (src,
"Checking caps: %" GST_PTR_FORMAT " vs. %" GST_PTR_FORMAT,
src->filter_caps, el_caps);
intersect = gst_caps_intersect (src->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 (src, "Incompatible caps");
gst_object_unref (el);
continue;
} else {
GST_DEBUG_OBJECT (src, "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 (src, "This worked!");
choice = el;
break;
}
/* collect all error messages */
while ((message = gst_bus_pop_filtered (bus, GST_MESSAGE_ERROR))) {
GST_DEBUG_OBJECT (src, "error message %" GST_PTR_FORMAT, message);
errors = g_slist_append (errors, message);
}
gst_element_set_state (el, GST_STATE_NULL);
gst_object_unref (el);
}
}
GST_DEBUG_OBJECT (src, "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 (src, "reposting message %p", errors->data);
gst_element_post_message (GST_ELEMENT (src), GST_MESSAGE (errors->data));
} else {
/* send warning message to application and use a fakesrc */
GST_ELEMENT_WARNING (src, RESOURCE, NOT_FOUND, (NULL),
("Failed to find a usable audio source"));
choice = gst_element_factory_make ("fakesrc", "fake-audio-src");
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;
}
static gboolean
gst_auto_audio_src_detect (GstAutoAudioSrc * src)
{
GstElement *esrc;
GstPad *targetpad;
gst_auto_audio_src_clear_kid (src);
/* find element */
GST_DEBUG_OBJECT (src, "Creating new kid");
if (!(esrc = gst_auto_audio_src_find_best (src)))
goto no_src;
src->kid = esrc;
/* Ensure the child is brought up to the right state to match the parent
* although it's currently always in READY and
* we're always doing NULL->READY. */
if (GST_STATE (src->kid) < GST_STATE (src))
gst_element_set_state (src->kid, GST_STATE (src));
gst_bin_add (GST_BIN (src), esrc);
/* attach ghost pad */
GST_DEBUG_OBJECT (src, "Re-assigning ghostpad");
targetpad = gst_element_get_static_pad (src->kid, "src");
gst_ghost_pad_set_target (GST_GHOST_PAD (src->pad), targetpad);
gst_object_unref (targetpad);
GST_DEBUG_OBJECT (src, "done changing auto audio source");
return TRUE;
/* ERRORS */
no_src:
{
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Failed to find a supported audio source"));
return FALSE;
}
}
static GstStateChangeReturn
gst_auto_audio_src_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstAutoAudioSrc *src = GST_AUTO_AUDIO_SRC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_auto_audio_src_detect (src))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_auto_audio_src_reset (src);
break;
default:
break;
}
return ret;
}
static void
gst_auto_audio_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAutoAudioSrc *src = GST_AUTO_AUDIO_SRC (object);
switch (prop_id) {
case PROP_CAPS:
if (src->filter_caps)
gst_caps_unref (src->filter_caps);
src->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_audio_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAutoAudioSrc *src = GST_AUTO_AUDIO_SRC (object);
switch (prop_id) {
case PROP_CAPS:{
gst_value_set_caps (value, src->filter_caps);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}

58
gst/autodetect/gstautoaudiosrc.h Normal file
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@ -0,0 +1,58 @@
/* GStreamer
* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* (c) 2008 Stefan Kost <ensonic@users.sf.net>
*
* 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.
*/
#ifndef __GST_AUTO_AUDIO_SRC_H__
#define __GST_AUTO_AUDIO_SRC_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_AUTO_AUDIO_SRC \
(gst_auto_audio_src_get_type ())
#define GST_AUTO_AUDIO_SRC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_AUTO_AUDIO_SRC, \
GstAutoAudioSrc))
#define GST_AUTO_AUDIO_SRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_AUTO_AUDIO_SRC, \
GstAutoAudioSrcClass))
#define GST_IS_AUTO_AUDIO_SRC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_AUTO_AUDIO_SRC))
#define GST_IS_AUTO_AUDIO_SRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_AUTO_AUDIO_SRC))
typedef struct _GstAutoAudioSrc {
GstBin parent;
/* explicit pointers to stuff used */
GstPad *pad;
GstElement *kid;
GstCaps *filter_caps;
} GstAutoAudioSrc;
typedef struct _GstAutoAudioSrcClass {
GstBinClass parent_class;
} GstAutoAudioSrcClass;
GType gst_auto_audio_src_get_type (void);
G_END_DECLS
#endif /* __GST_AUTO_AUDIO_SRC_H__ */

10
gst/autodetect/gstautodetect.c
View file

@ -25,7 +25,9 @@
#include "gstautodetect.h"
#include "gstautoaudiosink.h"
#include "gstautoaudiosrc.h"
#include "gstautovideosink.h"
#include "gstautovideosrc.h"
GST_DEBUG_CATEGORY (autodetect_debug);
@ -37,12 +39,16 @@ plugin_init (GstPlugin * plugin)
return gst_element_register (plugin, "autovideosink",
GST_RANK_NONE, GST_TYPE_AUTO_VIDEO_SINK) &&
gst_element_register (plugin, "autovideosrc",
GST_RANK_NONE, GST_TYPE_AUTO_VIDEO_SRC) &&
gst_element_register (plugin, "autoaudiosink",
GST_RANK_NONE, GST_TYPE_AUTO_AUDIO_SINK);
GST_RANK_NONE, GST_TYPE_AUTO_AUDIO_SINK) &&
gst_element_register (plugin, "autoaudiosrc",
GST_RANK_NONE, GST_TYPE_AUTO_AUDIO_SRC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"autodetect",
"Plugin contains auto-detection plugins for video/audio outputs",
"Plugin contains auto-detection plugins for video/audio in- and outputs",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)

13
gst/autodetect/gstautovideosink.c
View file

@ -22,19 +22,16 @@
* SECTION:element-autovideosink
* @see_also: autoaudiosink, ximagesink, xvimagesink, sdlvideosink
*
* <refsect2>
* <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>Video</quote> in the class field
* of their element information, and also have a non-zero autoplugging rank.
* </para>
*
* <refsect2>
* <title>Example launch line</title>
* <para>
* <programlisting>
* |[
* gst-launch -v -m videotestsrc ! autovideosink
* </programlisting>
* </para>
* ]|
* </refsect2>
*/
@ -72,7 +69,7 @@ GST_ELEMENT_DETAILS ("Auto video sink",
"Sink/Video",
"Wrapper video sink for automatically detected video sink",
"Ronald Bultje <rbultje@ronald.bitfreak.net>\n"
"Jan Schmidt <thaytan@noraisin.net");
"Jan Schmidt <thaytan@noraisin.net>");
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,

433
gst/autodetect/gstautovideosrc.c Normal file
View file

@ -0,0 +1,433 @@
/* GStreamer
* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* (c) 2006 Jan Schmidt <thaytan@noraisin.net>
* (c) 2008 Stefan Kost <ensonic@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-autovideosrc
* @see_also: autoaudiosrc, v4l2src, v4lsrc
*
* autovideosrc is a video src that automatically detects an appropriate
* video source to use. It does so by scanning the registry for all elements
* that have <quote>Source</quote> and <quote>Video</quote> in the class field
* of their element information, and also have a non-zero autoplugging rank.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v -m autovideosrc ! xvimagesink
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstautovideosrc.h"
#include "gstautodetect.h"
/* Properties */
enum
{
PROP_0,
PROP_CAPS,
};
static GstStateChangeReturn
gst_auto_video_src_change_state (GstElement * element,
GstStateChange transition);
static void gst_auto_video_src_dispose (GstAutoVideoSrc * src);
static void gst_auto_video_src_clear_kid (GstAutoVideoSrc * src);
static void gst_auto_video_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_auto_video_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
GST_BOILERPLATE (GstAutoVideoSrc, gst_auto_video_src, GstBin, GST_TYPE_BIN);
static const GstElementDetails gst_auto_video_src_details =
GST_ELEMENT_DETAILS ("Auto video source",
"Source/Video",
"Wrapper video source for automatically detected video source",
"Ronald Bultje <rbultje@ronald.bitfreak.net>\n"
"Jan Schmidt <thaytan@noraisin.net>\n"
"Stefan Kost <ensonic@users.sf.net>");
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static void
gst_auto_video_src_base_init (gpointer klass)
{
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (eklass,
gst_static_pad_template_get (&src_template));
gst_element_class_set_details (eklass, &gst_auto_video_src_details);
}
static void
gst_auto_video_src_class_init (GstAutoVideoSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
gobject_class = G_OBJECT_CLASS (klass);
gobject_class->dispose =
(GObjectFinalizeFunc) GST_DEBUG_FUNCPTR (gst_auto_video_src_dispose);
eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_video_src_change_state);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_auto_video_src_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_auto_video_src_get_property);
/**
* GstAutoVideoSrc:filter-caps
*
* This property will filter out candidate sources that can handle the specified
* caps. By default only video sources that support raw rgb and yuv video
* are selected.
*
* This property can only be set before the element goes to the READY state.
*
* Since: 0.10.11
**/
g_object_class_install_property (gobject_class, PROP_CAPS,
g_param_spec_boxed ("filter-caps", "Filter caps",
"Filter src candidates using these caps.", GST_TYPE_CAPS,
G_PARAM_READWRITE));
}
static void
gst_auto_video_src_dispose (GstAutoVideoSrc * src)
{
gst_auto_video_src_clear_kid (src);
if (src->filter_caps)
gst_caps_unref (src->filter_caps);
src->filter_caps = NULL;
G_OBJECT_CLASS (parent_class)->dispose ((GObject *) src);
}
static void
gst_auto_video_src_clear_kid (GstAutoVideoSrc * src)
{
if (src->kid) {
gst_element_set_state (src->kid, GST_STATE_NULL);
gst_bin_remove (GST_BIN (src), src->kid);
src->kid = NULL;
}
}
/*
* Hack to make initial linking work; ideally, this'd work even when
* no target has been assigned to the ghostpad yet.
*/
static void
gst_auto_video_src_reset (GstAutoVideoSrc * src)
{
GstPad *targetpad;
/* Remove any existing element */
gst_auto_video_src_clear_kid (src);
/* fakesrc placeholder */
src->kid = gst_element_factory_make ("fakesrc", "tempsrc");
gst_bin_add (GST_BIN (src), src->kid);
/* pad */
targetpad = gst_element_get_static_pad (src->kid, "src");
gst_ghost_pad_set_target (GST_GHOST_PAD (src->pad), targetpad);
gst_object_unref (targetpad);
}
static GstStaticCaps raw_caps =
GST_STATIC_CAPS ("video/x-raw-yuv; video/x-raw-rgb");
static void
gst_auto_video_src_init (GstAutoVideoSrc * src, GstAutoVideoSrcClass * g_class)
{
src->pad = gst_ghost_pad_new_no_target ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (src), src->pad);
gst_auto_video_src_reset (src);
/* set the default raw video caps */
src->filter_caps = gst_static_caps_get (&raw_caps);
/* mark as source */
GST_OBJECT_FLAG_UNSET (src, GST_ELEMENT_IS_SINK);
}
static gboolean
gst_auto_video_src_factory_filter (GstPluginFeature * feature, gpointer data)
{
guint rank;
const gchar *klass;
/* we only care about element factories */
if (!GST_IS_ELEMENT_FACTORY (feature))
return FALSE;
/* video sources */
klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature));
if (!(strstr (klass, "Source") && strstr (klass, "Video")))
return FALSE;
/* only select elements with autoplugging rank */
rank = gst_plugin_feature_get_rank (feature);
if (rank < GST_RANK_MARGINAL)
return FALSE;
return TRUE;
}
static gint
gst_auto_video_src_compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
{
gint diff;
diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
if (diff != 0)
return diff;
return strcmp (gst_plugin_feature_get_name (f2),
gst_plugin_feature_get_name (f1));
}
static GstElement *
gst_auto_video_src_create_element_with_pretty_name (GstAutoVideoSrc * src,
GstElementFactory * factory)
{
GstElement *element;
gchar *name, *marker;
marker = g_strdup (GST_PLUGIN_FEATURE (factory)->name);
if (g_str_has_suffix (marker, "src"))
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-src-%s", GST_OBJECT_NAME (src), marker);
g_free (marker);
element = gst_element_factory_create (factory, name);
g_free (name);
return element;
}
static GstElement *
gst_auto_video_src_find_best (GstAutoVideoSrc * src)
{
GList *list, *item;
GstElement *choice = NULL;
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_src_factory_filter, FALSE, src);
list = g_list_sort (list, (GCompareFunc) gst_auto_video_src_compare_ranks);
GST_LOG_OBJECT (src, "Trying to find usable video devices ...");
for (item = list; item != NULL; item = item->next) {
GstElementFactory *f = GST_ELEMENT_FACTORY (item->data);
GstElement *el;
if ((el = gst_auto_video_src_create_element_with_pretty_name (src, f))) {
GstStateChangeReturn ret;
GST_DEBUG_OBJECT (src, "Testing %s", GST_PLUGIN_FEATURE (f)->name);
/* If AutoVideoSrc has been provided with filter caps,
* accept only sources that match with the filter caps */
if (src->filter_caps) {
el_pad = gst_element_get_static_pad (GST_ELEMENT (el), "src");
el_caps = gst_pad_get_caps (el_pad);
gst_object_unref (el_pad);
GST_DEBUG_OBJECT (src,
"Checking caps: %" GST_PTR_FORMAT " vs. %" GST_PTR_FORMAT,
src->filter_caps, el_caps);
intersect = gst_caps_intersect (src->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 (src, "Incompatible caps");
gst_object_unref (el);
continue;
} else {
GST_DEBUG_OBJECT (src, "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 (src, "This worked!");
choice = el;
break;
}
/* collect all error messages */
while ((message = gst_bus_pop_filtered (bus, GST_MESSAGE_ERROR))) {
GST_DEBUG_OBJECT (src, "error message %" GST_PTR_FORMAT, message);
errors = g_slist_append (errors, message);
}
gst_element_set_state (el, GST_STATE_NULL);
gst_object_unref (el);
}
}
GST_DEBUG_OBJECT (src, "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 (src, "reposting message %p", errors->data);
gst_element_post_message (GST_ELEMENT (src), GST_MESSAGE (errors->data));
} else {
/* send warning message to application and use a fakesrc */
GST_ELEMENT_WARNING (src, RESOURCE, NOT_FOUND, (NULL),
("Failed to find a usable video source"));
choice = gst_element_factory_make ("fakesrc", "fake-video-src");
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;
}
static gboolean
gst_auto_video_src_detect (GstAutoVideoSrc * src)
{
GstElement *esrc;
GstPad *targetpad;
gst_auto_video_src_clear_kid (src);
/* find element */
GST_DEBUG_OBJECT (src, "Creating new kid");
if (!(esrc = gst_auto_video_src_find_best (src)))
goto no_src;
src->kid = esrc;
gst_bin_add (GST_BIN (src), esrc);
/* attach ghost pad */
GST_DEBUG_OBJECT (src, "Re-assigning ghostpad");
targetpad = gst_element_get_static_pad (src->kid, "src");
gst_ghost_pad_set_target (GST_GHOST_PAD (src->pad), targetpad);
gst_object_unref (targetpad);
GST_DEBUG_OBJECT (src, "done changing auto video source");
return TRUE;
/* ERRORS */
no_src:
{
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Failed to find a supported video source"));
return FALSE;
}
}
static GstStateChangeReturn
gst_auto_video_src_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstAutoVideoSrc *src = GST_AUTO_VIDEO_SRC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_auto_video_src_detect (src))
return GST_STATE_CHANGE_FAILURE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
gst_auto_video_src_reset (src);
break;
default:
break;
}
return ret;
}
static void
gst_auto_video_src_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstAutoVideoSrc *src = GST_AUTO_VIDEO_SRC (object);
switch (prop_id) {
case PROP_CAPS:
if (src->filter_caps)
gst_caps_unref (src->filter_caps);
src->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_src_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstAutoVideoSrc *src = GST_AUTO_VIDEO_SRC (object);
switch (prop_id) {
case PROP_CAPS:{
gst_value_set_caps (value, src->filter_caps);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}

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/* GStreamer
* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
* (c) 2008 Stefan Kost <ensonic@users.sf.net>
*
* 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.
*/
#ifndef __GST_AUTO_VIDEO_SRC_H__
#define __GST_AUTO_VIDEO_SRC_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define GST_TYPE_AUTO_VIDEO_SRC \
(gst_auto_video_src_get_type ())
#define GST_AUTO_VIDEO_SRC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_AUTO_VIDEO_SRC, \
GstAutoVideoSrc))
#define GST_AUTO_VIDEO_SRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_AUTO_VIDEO_SRC, \
GstAutoVideoSrcClass))
#define GST_IS_AUTO_VIDEO_SRC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_AUTO_VIDEO_SRC))
#define GST_IS_AUTO_VIDEO_SRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_AUTO_VIDEO_SRC))
typedef struct _GstAutoVideoSrc {
GstBin parent;
/* explicit pointers to stuff used */
GstPad *pad;
GstElement *kid;
GstCaps *filter_caps;
} GstAutoVideoSrc;
typedef struct _GstAutoVideoSrcClass {
GstBinClass parent_class;
} GstAutoVideoSrcClass;
GType gst_auto_video_src_get_type (void);
G_END_DECLS
#endif /* __GST_AUTO_VIDEO_SRC_H__ */