--- a/gst_plugins_good/gst/autodetect/gstautoaudiosink.c Wed Mar 31 22:03:18 2010 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,439 +0,0 @@
-/* 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
- *
- * <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>
- * <title>Example launch line</title>
- * <para>
- * <programlisting>
- * gst-launch -v -m audiotestsrc ! audioconvert ! audioresample ! autoaudiosink
- * </programlisting>
- * </para>
- * </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 const GstElementDetails gst_auto_audio_sink_details =
-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");
-
-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 (eklass, &gst_auto_audio_sink_details);
-}
-
-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_DEBUG_FUNCPTR (gst_auto_audio_sink_dispose);
- eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_audio_sink_change_state);
- gobject_class->set_property =
- GST_DEBUG_FUNCPTR (gst_auto_audio_sink_set_property);
- gobject_class->get_property =
- GST_DEBUG_FUNCPTR (gst_auto_audio_sink_get_property);
-
- /**
- * 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));
-}
-
-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;
- }
-}
-
-/*
- * 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_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, *intersect = 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);
- intersect = gst_caps_intersect (sink->filter_caps, el_caps);
- no_match = gst_caps_is_empty (intersect);
- gst_caps_unref (el_caps);
- gst_caps_unref (intersect);
-
- if (no_match) {
- GST_DEBUG_OBJECT (sink, "Incompatible caps");
- gst_object_unref (el);
- continue;
- } else {
- GST_DEBUG_OBJECT (sink, "Found compatible caps");
- }
- }
-
- gst_element_set_bus (el, bus);
- ret = gst_element_set_state (el, GST_STATE_READY);
- if (ret == GST_STATE_CHANGE_SUCCESS) {
- GST_DEBUG_OBJECT (sink, "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))) {
- return FALSE;
- }
-
- 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_pad (sink->kid, "sink");
- gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
- gst_object_unref (targetpad);
- GST_DEBUG_OBJECT (sink, "done changing auto audio sink");
-
- return TRUE;
-}
-
-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;
- }
-}