diff options
Diffstat (limited to 'gst/autodetect')
| -rw-r--r-- | gst/autodetect/Makefile.am | 33 | ||||
| -rw-r--r-- | gst/autodetect/Makefile.in | 870 | ||||
| -rw-r--r-- | gst/autodetect/gstautoaudiosink.c | 446 | ||||
| -rw-r--r-- | gst/autodetect/gstautoaudiosink.h | 57 | ||||
| -rw-r--r-- | gst/autodetect/gstautoaudiosrc.c | 448 | ||||
| -rw-r--r-- | gst/autodetect/gstautoaudiosrc.h | 58 | ||||
| -rw-r--r-- | gst/autodetect/gstautodetect.c | 54 | ||||
| -rw-r--r-- | gst/autodetect/gstautodetect.h | 26 | ||||
| -rw-r--r-- | gst/autodetect/gstautovideosink.c | 434 | ||||
| -rw-r--r-- | gst/autodetect/gstautovideosink.h | 57 | ||||
| -rw-r--r-- | gst/autodetect/gstautovideosrc.c | 436 | ||||
| -rw-r--r-- | gst/autodetect/gstautovideosrc.h | 58 |
12 files changed, 2977 insertions, 0 deletions
diff --git a/gst/autodetect/Makefile.am b/gst/autodetect/Makefile.am new file mode 100644 index 0000000..5bf57c7 --- /dev/null +++ b/gst/autodetect/Makefile.am @@ -0,0 +1,33 @@ +plugin_LTLIBRARIES = libgstautodetect.la + +libgstautodetect_la_SOURCES = \ + gstautoaudiosink.c \ + gstautoaudiosrc.c \ + gstautodetect.c \ + gstautovideosink.c \ + gstautovideosrc.c +libgstautodetect_la_CFLAGS = $(GST_CFLAGS) +libgstautodetect_la_LIBADD = $(GST_LIBS) +libgstautodetect_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS) +libgstautodetect_la_LIBTOOLFLAGS = --tag=disable-static + +noinst_HEADERS = \ + gstautoaudiosink.h \ + gstautoaudiosrc.h \ + gstautodetect.h \ + gstautovideosink.h \ + gstautovideosrc.h + +Android.mk: Makefile.am $(BUILT_SOURCES) + androgenizer \ + -:PROJECT libgstautodetect -:SHARED libgstautodetect \ + -:TAGS eng debug \ + -:REL_TOP $(top_srcdir) -:ABS_TOP $(abs_top_srcdir) \ + -:SOURCES $(libgstautodetect_la_SOURCES) \ + -:CFLAGS $(DEFS) $(DEFAULT_INCLUDES) $(libgstautodetect_la_CFLAGS) \ + -:LDFLAGS $(libgstautodetect_la_LDFLAGS) \ + $(libgstautodetect_la_LIBADD) \ + -ldl \ + -:PASSTHROUGH LOCAL_ARM_MODE:=arm \ + LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \ + > $@ diff --git a/gst/autodetect/Makefile.in b/gst/autodetect/Makefile.in new file mode 100644 index 0000000..34354b2 --- /dev/null +++ b/gst/autodetect/Makefile.in @@ -0,0 +1,870 @@ +# Makefile.in generated by automake 1.11.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, +# Inc. +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR 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install-pluginLTLIBRARIES \ + install-ps install-ps-am install-strip installcheck \ + installcheck-am installdirs maintainer-clean \ + maintainer-clean-generic mostlyclean mostlyclean-compile \ + mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \ + tags uninstall uninstall-am uninstall-pluginLTLIBRARIES + + +Android.mk: Makefile.am $(BUILT_SOURCES) + androgenizer \ + -:PROJECT libgstautodetect -:SHARED libgstautodetect \ + -:TAGS eng debug \ + -:REL_TOP $(top_srcdir) -:ABS_TOP $(abs_top_srcdir) \ + -:SOURCES $(libgstautodetect_la_SOURCES) \ + -:CFLAGS $(DEFS) $(DEFAULT_INCLUDES) $(libgstautodetect_la_CFLAGS) \ + -:LDFLAGS $(libgstautodetect_la_LDFLAGS) \ + $(libgstautodetect_la_LIBADD) \ + -ldl \ + -:PASSTHROUGH LOCAL_ARM_MODE:=arm \ + LOCAL_MODULE_PATH:='$$(TARGET_OUT)/lib/gstreamer-0.10' \ + > $@ + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/gst/autodetect/gstautoaudiosink.c b/gst/autodetect/gstautoaudiosink.c new file mode 100644 index 0000000..fae54f5 --- /dev/null +++ b/gst/autodetect/gstautoaudiosink.c @@ -0,0 +1,446 @@ +/* GStreamer + * (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net> + * (c) 2006 Jan Schmidt <thaytan@noraisin.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-autoaudiosink + * @see_also: autovideosink, alsasink, osssink + * + * 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. + * + * <refsect2> + * <title>Example launch line</title> + * |[ + * gst-launch -v -m audiotestsrc ! audioconvert ! audioresample ! autoaudiosink + * ]| + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <string.h> + +#include "gstautoaudiosink.h" +#include "gstautodetect.h" + +/* Properties */ +enum +{ + PROP_0, + PROP_CAPS, +}; + +static GstStateChangeReturn +gst_auto_audio_sink_change_state (GstElement * element, + GstStateChange transition); +static void gst_auto_audio_sink_dispose (GstAutoAudioSink * sink); +static void gst_auto_audio_sink_clear_kid (GstAutoAudioSink * sink); +static void gst_auto_audio_sink_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_auto_audio_sink_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); + +GST_BOILERPLATE (GstAutoAudioSink, gst_auto_audio_sink, GstBin, GST_TYPE_BIN); + +static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS_ANY); + +static void +gst_auto_audio_sink_base_init (gpointer klass) +{ + GstElementClass *eklass = GST_ELEMENT_CLASS (klass); + + gst_element_class_add_pad_template (eklass, + gst_static_pad_template_get (&sink_template)); + + gst_element_class_set_details_simple (eklass, "Auto audio sink", + "Sink/Audio", + "Wrapper audio sink for automatically detected audio sink", + "Jan Schmidt <thaytan@noraisin.net>"); +} + +static void +gst_auto_audio_sink_class_init (GstAutoAudioSinkClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *eklass; + + gobject_class = G_OBJECT_CLASS (klass); + eklass = GST_ELEMENT_CLASS (klass); + + gobject_class->dispose = (GObjectFinalizeFunc) gst_auto_audio_sink_dispose; + gobject_class->set_property = gst_auto_audio_sink_set_property; + gobject_class->get_property = gst_auto_audio_sink_get_property; + + eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_audio_sink_change_state); + + /** + * GstAutoAudioSink: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: 0.10.7 + **/ + 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 | G_PARAM_STATIC_STRINGS)); +} + +static void +gst_auto_audio_sink_dispose (GstAutoAudioSink * sink) +{ + gst_auto_audio_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); +} + +static void +gst_auto_audio_sink_clear_kid (GstAutoAudioSink * sink) +{ + if (sink->kid) { + gst_element_set_state (sink->kid, GST_STATE_NULL); + gst_bin_remove (GST_BIN (sink), sink->kid); + sink->kid = NULL; + /* Don't lose the SINK flag */ + GST_OBJECT_FLAG_SET (sink, GST_ELEMENT_IS_SINK); + } +} + +/* + * 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_sink_reset (GstAutoAudioSink * sink) +{ + GstPad *targetpad; + + gst_auto_audio_sink_clear_kid (sink); + + /* fakesink placeholder */ + sink->kid = gst_element_factory_make ("fakesink", "tempsink"); + gst_bin_add (GST_BIN (sink), sink->kid); + + /* pad */ + targetpad = gst_element_get_static_pad (sink->kid, "sink"); + gst_ghost_pad_set_target (GST_GHOST_PAD (sink->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_sink_init (GstAutoAudioSink * sink, + GstAutoAudioSinkClass * g_class) +{ + sink->pad = gst_ghost_pad_new_no_target ("sink", GST_PAD_SINK); + gst_element_add_pad (GST_ELEMENT (sink), sink->pad); + + gst_auto_audio_sink_reset (sink); + + /* set the default raw audio caps */ + sink->filter_caps = gst_static_caps_get (&raw_caps); + + /* mark as sink */ + GST_OBJECT_FLAG_SET (sink, GST_ELEMENT_IS_SINK); +} + +static gboolean +gst_auto_audio_sink_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, "Sink") && 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_sink_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_sink_create_element_with_pretty_name (GstAutoAudioSink * 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_audio_sink_find_best (GstAutoAudioSink * sink) +{ + 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; + gboolean no_match = TRUE; + + list = gst_registry_feature_filter (gst_registry_get_default (), + (GstPluginFeatureFilter) gst_auto_audio_sink_factory_filter, FALSE, sink); + list = g_list_sort (list, (GCompareFunc) gst_auto_audio_sink_compare_ranks); + + /* We don't treat sound server sinks special. Our policy is that sound + * server sinks 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 (sink, "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_sink_create_element_with_pretty_name (sink, f))) { + GstStateChangeReturn ret; + + GST_DEBUG_OBJECT (sink, "Testing %s", GST_PLUGIN_FEATURE (f)->name); + + /* If autoaudiosink 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); + no_match = !gst_caps_can_intersect (sink->filter_caps, el_caps); + gst_caps_unref (el_caps); + + 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, "This worked!"); + choice = el; + break; + } + + /* 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); + } + } + + 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 audio sink")); + choice = gst_element_factory_make ("fakesink", "fake-audio-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; +} + +static gboolean +gst_auto_audio_sink_detect (GstAutoAudioSink * sink) +{ + GstElement *esink; + GstPad *targetpad; + + gst_auto_audio_sink_clear_kid (sink); + + /* find element */ + GST_DEBUG_OBJECT (sink, "Creating new kid"); + 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 + * although it's currently always in READY and + * we're always doing NULL->READY. */ + if (GST_STATE (sink->kid) < GST_STATE (sink)) + gst_element_set_state (sink->kid, GST_STATE (sink)); + + gst_bin_add (GST_BIN (sink), esink); + + /* attach ghost pad */ + GST_DEBUG_OBJECT (sink, "Re-assigning ghostpad"); + targetpad = gst_element_get_static_pad (sink->kid, "sink"); + if (!gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad)) + goto target_failed; + + gst_object_unref (targetpad); + 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; + } +target_failed: + { + GST_ELEMENT_ERROR (sink, LIBRARY, INIT, (NULL), + ("Failed to set target pad")); + gst_object_unref (targetpad); + return FALSE; + } +} + +static GstStateChangeReturn +gst_auto_audio_sink_change_state (GstElement * element, + GstStateChange transition) +{ + GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; + GstAutoAudioSink *sink = GST_AUTO_AUDIO_SINK (element); + + switch (transition) { + case GST_STATE_CHANGE_NULL_TO_READY: + if (!gst_auto_audio_sink_detect (sink)) + 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_sink_reset (sink); + break; + default: + break; + } + + return ret; +} + +static void +gst_auto_audio_sink_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstAutoAudioSink *sink = GST_AUTO_AUDIO_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_audio_sink_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec) +{ + GstAutoAudioSink *sink = GST_AUTO_AUDIO_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; + } +} diff --git a/gst/autodetect/gstautoaudiosink.h b/gst/autodetect/gstautoaudiosink.h new file mode 100644 index 0000000..2e5085f --- /dev/null +++ b/gst/autodetect/gstautoaudiosink.h @@ -0,0 +1,57 @@ +/* GStreamer + * (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.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_SINK_H__ +#define __GST_AUTO_AUDIO_SINK_H__ + +#include <gst/gst.h> + +G_BEGIN_DECLS + +#define GST_TYPE_AUTO_AUDIO_SINK \ + (gst_auto_audio_sink_get_type ()) +#define GST_AUTO_AUDIO_SINK(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_AUTO_AUDIO_SINK, \ + GstAutoAudioSink)) +#define GST_AUTO_AUDIO_SINK_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_AUTO_AUDIO_SINK, \ + GstAutoAudioSinkClass)) +#define GST_IS_AUTO_AUDIO_SINK(obj) \ + (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_AUTO_AUDIO_SINK)) +#define GST_IS_AUTO_AUDIO_SINK_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_AUTO_AUDIO_SINK)) + +typedef struct _GstAutoAudioSink { + GstBin parent; + + /* explicit pointers to stuff used */ + GstPad *pad; + GstElement *kid; + GstCaps *filter_caps; +} GstAutoAudioSink; + +typedef struct _GstAutoAudioSinkClass { + GstBinClass parent_class; +} GstAutoAudioSinkClass; + +GType gst_auto_audio_sink_get_type (void); + +G_END_DECLS + +#endif /* __GST_AUTO_AUDIO_SINK_H__ */ diff --git a/gst/autodetect/gstautoaudiosrc.c b/gst/autodetect/gstautoaudiosrc.c new file mode 100644 index 0000000..40c53c6 --- /dev/null +++ b/gst/autodetect/gstautoaudiosrc.c @@ -0,0 +1,448 @@ +/* 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 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_simple (eklass, "Auto audio source", + "Source/Audio", + "Wrapper audio source for automatically detected audio source", + "Jan Schmidt <thaytan@noraisin.net>, " + "Stefan Kost <ensonic@users.sf.net>"); +} + +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_auto_audio_src_dispose; + gobject_class->set_property = gst_auto_audio_src_set_property; + gobject_class->get_property = gst_auto_audio_src_get_property; + + eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_audio_src_change_state); + + /** + * 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: 0.10.14 + **/ + 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 | G_PARAM_STATIC_STRINGS)); +} + +static void +gst_auto_audio_src_dispose (GstAutoAudioSrc * src) +{ + gst_auto_audio_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_audio_src_clear_kid (GstAutoAudioSrc * src) +{ + if (src->kid) { + gst_element_set_state (src->kid, GST_STATE_NULL); + gst_bin_remove (GST_BIN (src), src->kid); + src->kid = NULL; + + /* Don't lose SOURCE flag */ + GST_OBJECT_FLAG_SET (src, GST_ELEMENT_IS_SOURCE); + } +} + +/* + * 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_SET (src, GST_ELEMENT_IS_SOURCE); +} + +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; + 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); + no_match = !gst_caps_can_intersect (src->filter_caps, el_caps); + gst_caps_unref (el_caps); + + 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"); + if (!gst_ghost_pad_set_target (GST_GHOST_PAD (src->pad), targetpad)) + goto target_failed; + + 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; + } +target_failed: + { + GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL), + ("Failed to set target pad")); + gst_object_unref (targetpad); + 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; + } +} diff --git a/gst/autodetect/gstautoaudiosrc.h b/gst/autodetect/gstautoaudiosrc.h new file mode 100644 index 0000000..8669627 --- /dev/null +++ b/gst/autodetect/gstautoaudiosrc.h @@ -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__ */ diff --git a/gst/autodetect/gstautodetect.c b/gst/autodetect/gstautodetect.c new file mode 100644 index 0000000..c331655 --- /dev/null +++ b/gst/autodetect/gstautodetect.c @@ -0,0 +1,54 @@ +/* GStreamer + * (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gst/gst.h> + +#include "gstautodetect.h" +#include "gstautoaudiosink.h" +#include "gstautoaudiosrc.h" +#include "gstautovideosink.h" +#include "gstautovideosrc.h" + +GST_DEBUG_CATEGORY (autodetect_debug); + +static gboolean +plugin_init (GstPlugin * plugin) +{ + GST_DEBUG_CATEGORY_INIT (autodetect_debug, "autodetect", 0, + "Autodetection audio/video output wrapper elements"); + + 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_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 in- and outputs", + plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN) diff --git a/gst/autodetect/gstautodetect.h b/gst/autodetect/gstautodetect.h new file mode 100644 index 0000000..d4952d7 --- /dev/null +++ b/gst/autodetect/gstautodetect.h @@ -0,0 +1,26 @@ +/* GStreamer + * (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.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_DETECT_H__ +#define __GST_AUTO_DETECT_H__ + +GST_DEBUG_CATEGORY_EXTERN (autodetect_debug); +#define GST_CAT_DEFAULT autodetect_debug + +#endif /* __GST_AUTO_DETECT_H__ */ diff --git a/gst/autodetect/gstautovideosink.c b/gst/autodetect/gstautovideosink.c new file mode 100644 index 0000000..7e37ffe --- /dev/null +++ b/gst/autodetect/gstautovideosink.c @@ -0,0 +1,434 @@ +/* GStreamer + * (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net> + * (c) 2006 Jan Schmidt <thaytan@noraisin.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-autovideosink + * @see_also: autoaudiosink, ximagesink, xvimagesink, sdlvideosink + * + * 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. + * + * <refsect2> + * <title>Example launch line</title> + * |[ + * gst-launch -v -m videotestsrc ! autovideosink + * ]| + * </refsect2> + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <string.h> + +#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 GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS_ANY); + +static void +gst_auto_video_sink_base_init (gpointer klass) +{ + GstElementClass *eklass = GST_ELEMENT_CLASS (klass); + + gst_element_class_add_pad_template (eklass, + gst_static_pad_template_get (&sink_template)); + gst_element_class_set_details_simple (eklass, "Auto video sink", + "Sink/Video", + "Wrapper video sink for automatically detected video sink", + "Jan Schmidt <thaytan@noraisin.net>"); +} + +static void +gst_auto_video_sink_class_init (GstAutoVideoSinkClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *eklass = GST_ELEMENT_CLASS (klass); + + gobject_class = G_OBJECT_CLASS (klass); + gobject_class->dispose = (GObjectFinalizeFunc) gst_auto_video_sink_dispose; + gobject_class->set_property = gst_auto_video_sink_set_property; + gobject_class->get_property = gst_auto_video_sink_get_property; + + eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_video_sink_change_state); + /** + * 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 | G_PARAM_STATIC_STRINGS)); +} + +static void +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); +} + +static void +gst_auto_video_sink_clear_kid (GstAutoVideoSink * sink) +{ + if (sink->kid) { + gst_element_set_state (sink->kid, GST_STATE_NULL); + gst_bin_remove (GST_BIN (sink), sink->kid); + sink->kid = NULL; + /* Don't lose the SINK flag */ + GST_OBJECT_FLAG_SET (sink, GST_ELEMENT_IS_SINK); + } +} + +/* + * 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_sink_reset (GstAutoVideoSink * sink) +{ + GstPad *targetpad; + + /* Remove any existing element */ + gst_auto_video_sink_clear_kid (sink); + + /* fakesink placeholder */ + sink->kid = gst_element_factory_make ("fakesink", "tempsink"); + gst_bin_add (GST_BIN (sink), sink->kid); + + /* pad, setting this target should always work */ + targetpad = gst_element_get_static_pad (sink->kid, "sink"); + gst_ghost_pad_set_target (GST_GHOST_PAD (sink->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_sink_init (GstAutoVideoSink * sink, + GstAutoVideoSinkClass * g_class) +{ + sink->pad = gst_ghost_pad_new_no_target ("sink", GST_PAD_SINK); + gst_element_add_pad (GST_ELEMENT (sink), sink->pad); + + 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); +} + +static gboolean +gst_auto_video_sink_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 sinks */ + klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature)); + if (!(strstr (klass, "Sink") && 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_sink_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_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; + GstMessage *message = NULL; + GSList *errors = NULL; + GstBus *bus = gst_bus_new (); + GstPad *el_pad = NULL; + GstCaps *el_caps = 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); + + 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; + + if ((el = gst_auto_video_sink_create_element_with_pretty_name (sink, f))) { + GstStateChangeReturn ret; + + 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); + no_match = !gst_caps_can_intersect (sink->filter_caps, el_caps); + gst_caps_unref (el_caps); + + 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, "This worked!"); + choice = el; + break; + } + + /* 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); + } + } + + 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; +} + +static gboolean +gst_auto_video_sink_detect (GstAutoVideoSink * sink) +{ + GstElement *esink; + GstPad *targetpad; + + gst_auto_video_sink_clear_kid (sink); + + /* find element */ + GST_DEBUG_OBJECT (sink, "Creating new kid"); + if (!(esink = gst_auto_video_sink_find_best (sink))) + goto no_sink; + + sink->kid = esink; + gst_bin_add (GST_BIN (sink), esink); + + /* attach ghost pad */ + GST_DEBUG_OBJECT (sink, "Re-assigning ghostpad"); + targetpad = gst_element_get_static_pad (sink->kid, "sink"); + if (!gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad)) + goto target_failed; + + gst_object_unref (targetpad); + GST_DEBUG_OBJECT (sink, "done changing auto video sink"); + + return TRUE; + + /* ERRORS */ +no_sink: + { + GST_ELEMENT_ERROR (sink, LIBRARY, INIT, (NULL), + ("Failed to find a supported video sink")); + return FALSE; + } +target_failed: + { + GST_ELEMENT_ERROR (sink, LIBRARY, INIT, (NULL), + ("Failed to set target pad")); + gst_object_unref (targetpad); + return FALSE; + } +} + +static GstStateChangeReturn +gst_auto_video_sink_change_state (GstElement * element, + GstStateChange transition) +{ + GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; + GstAutoVideoSink *sink = GST_AUTO_VIDEO_SINK (element); + + switch (transition) { + case GST_STATE_CHANGE_NULL_TO_READY: + if (!gst_auto_video_sink_detect (sink)) + 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_sink_reset (sink); + break; + default: + break; + } + + 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; + } +} diff --git a/gst/autodetect/gstautovideosink.h b/gst/autodetect/gstautovideosink.h new file mode 100644 index 0000000..9aece2b --- /dev/null +++ b/gst/autodetect/gstautovideosink.h @@ -0,0 +1,57 @@ +/* GStreamer + * (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.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_SINK_H__ +#define __GST_AUTO_VIDEO_SINK_H__ + +#include <gst/gst.h> + +G_BEGIN_DECLS + +#define GST_TYPE_AUTO_VIDEO_SINK \ + (gst_auto_video_sink_get_type ()) +#define GST_AUTO_VIDEO_SINK(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_AUTO_VIDEO_SINK, \ + GstAutoVideoSink)) +#define GST_AUTO_VIDEO_SINK_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_AUTO_VIDEO_SINK, \ + GstAutoVideoSinkClass)) +#define GST_IS_AUTO_VIDEO_SINK(obj) \ + (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_AUTO_VIDEO_SINK)) +#define GST_IS_AUTO_VIDEO_SINK_CLASS(klass) \ + (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_AUTO_VIDEO_SINK)) + +typedef struct _GstAutoVideoSink { + GstBin parent; + + /* explicit pointers to stuff used */ + GstPad *pad; + GstElement *kid; + GstCaps *filter_caps; +} GstAutoVideoSink; + +typedef struct _GstAutoVideoSinkClass { + GstBinClass parent_class; +} GstAutoVideoSinkClass; + +GType gst_auto_video_sink_get_type (void); + +G_END_DECLS + +#endif /* __GST_AUTO_VIDEO_SINK_H__ */ diff --git a/gst/autodetect/gstautovideosrc.c b/gst/autodetect/gstautovideosrc.c new file mode 100644 index 0000000..af19456 --- /dev/null +++ b/gst/autodetect/gstautovideosrc.c @@ -0,0 +1,436 @@ +/* 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 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_simple (eklass, "Auto video source", + "Source/Video", + "Wrapper video source for automatically detected video source", + "Jan Schmidt <thaytan@noraisin.net>, " + "Stefan Kost <ensonic@users.sf.net>"); +} + +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_auto_video_src_dispose; + gobject_class->set_property = gst_auto_video_src_set_property; + gobject_class->get_property = gst_auto_video_src_get_property; + + eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_video_src_change_state); + + /** + * 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: 0.10.14 + **/ + 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 | G_PARAM_STATIC_STRINGS)); +} + +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; + /* Don't loose SOURCE flag */ + GST_OBJECT_FLAG_SET (src, GST_ELEMENT_IS_SOURCE); + } +} + +/* + * 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_SET (src, GST_ELEMENT_IS_SOURCE); +} + +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; + 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); + no_match = !gst_caps_can_intersect (src->filter_caps, el_caps); + gst_caps_unref (el_caps); + + 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"); + if (!gst_ghost_pad_set_target (GST_GHOST_PAD (src->pad), targetpad)) + goto target_failed; + + 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; + } +target_failed: + { + GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL), + ("Failed to set target pad")); + gst_object_unref (targetpad); + 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; + } +} diff --git a/gst/autodetect/gstautovideosrc.h b/gst/autodetect/gstautovideosrc.h new file mode 100644 index 0000000..d72bcd2 --- /dev/null +++ b/gst/autodetect/gstautovideosrc.h @@ -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_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__ */ |