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99fc32962a
Original commit message from CVS: 2005-08-28 Andy Wingo <wingo@pobox.com> * Updates for two-arg init from GST_BOILERPLATE. * ext/ladspa/gstsignalprocessor.c (gst_signal_processor_init): Use the second arg for the class, because G_OBJECT_GET_CLASS (self) returns the wrong thing. (gst_signal_processor_add_pad_from_template): Make pads of the right type. * ext/ladspa/gstladspa.c (gst_ladspa_class_get_param_spec): Make writable param specs G_PARAM_CONSTRUCT so default values work. (gst_ladspa_init): Use the second arg for the class.
249 lines
6.9 KiB
C
249 lines
6.9 KiB
C
/* GStreamer
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* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "gstautoaudiosink.h"
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#include "gstautodetect.h"
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static GstElementStateReturn
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gst_auto_audio_sink_change_state (GstElement * element);
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GST_BOILERPLATE (GstAutoAudioSink, gst_auto_audio_sink, GstBin, GST_TYPE_BIN);
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static void
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gst_auto_audio_sink_base_init (gpointer klass)
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{
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GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
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GstElementDetails gst_auto_audio_sink_details = {
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"Auto audio sink",
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"Sink/Audio",
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"Audio sink embedding the Auto-settings for audio output",
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"Ronald Bultje <rbultje@ronald.bitfreak.net>"
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};
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GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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gst_element_class_add_pad_template (eklass,
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gst_static_pad_template_get (&sink_template));
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gst_element_class_set_details (eklass, &gst_auto_audio_sink_details);
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}
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static void
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gst_auto_audio_sink_class_init (GstAutoAudioSinkClass * klass)
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{
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GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
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eklass->change_state = gst_auto_audio_sink_change_state;
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}
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/*
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* Hack to make initial linking work; ideally, this'd work even when
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* no target has been assigned to the ghostpad yet.
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*/
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static void
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gst_auto_audio_sink_reset (GstAutoAudioSink * sink)
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{
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GstPad *targetpad;
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/* fakesink placeholder */
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if (sink->kid) {
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gst_bin_remove (GST_BIN (sink), sink->kid);
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}
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sink->kid = gst_element_factory_make ("fakesink", "tempsink");
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gst_bin_add (GST_BIN (sink), sink->kid);
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/* pad */
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targetpad = gst_element_get_pad (sink->kid, "sink");
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gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
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gst_object_unref (targetpad);
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}
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static void
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gst_auto_audio_sink_init (GstAutoAudioSink * sink,
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GstAutoAudioSinkClass * g_class)
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{
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sink->pad = gst_ghost_pad_new_notarget ("sink", GST_PAD_SINK);
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gst_element_add_pad (GST_ELEMENT (sink), sink->pad);
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gst_auto_audio_sink_reset (sink);
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}
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static gboolean
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gst_auto_audio_sink_factory_filter (GstPluginFeature * feature, gpointer data)
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{
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guint rank;
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const gchar *klass;
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/* we only care about element factories */
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if (!GST_IS_ELEMENT_FACTORY (feature))
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return FALSE;
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/* audio sinks */
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klass = gst_element_factory_get_klass (GST_ELEMENT_FACTORY (feature));
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if (strcmp (klass, "Sink/Audio") != 0)
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return FALSE;
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/* only select elements with autoplugging rank */
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rank = gst_plugin_feature_get_rank (feature);
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if (rank < GST_RANK_MARGINAL)
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return FALSE;
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return TRUE;
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}
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static gint
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gst_auto_audio_sink_compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
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{
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gint diff;
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diff = gst_plugin_feature_get_rank (f2) - gst_plugin_feature_get_rank (f1);
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if (diff != 0)
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return diff;
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return strcmp (gst_plugin_feature_get_name (f2),
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gst_plugin_feature_get_name (f1));
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}
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static GstElement *
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gst_auto_audio_sink_find_best (GstAutoAudioSink * sink)
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{
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GList *list, *item;
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GstElement *choice = NULL;
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gboolean ss = TRUE;
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list = gst_registry_pool_feature_filter (
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(GstPluginFeatureFilter) gst_auto_audio_sink_factory_filter, FALSE, sink);
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list = g_list_sort (list, (GCompareFunc) gst_auto_audio_sink_compare_ranks);
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/* FIXME:
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* - soundservers have no priority yet.
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* - soundserversinks should only be chosen if already running, or if
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* the user explicitely wants this to run... That is not easy.
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*/
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while (1) {
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GST_LOG ("Trying to find %s", ss ? "soundservers" : "audio devices");
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for (item = list; item != NULL; item = item->next) {
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GstElementFactory *f = GST_ELEMENT_FACTORY (item->data);
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GstElement *el;
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if ((el = gst_element_factory_create (f, "actual-sink"))) {
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gboolean has_p = g_object_class_find_property (G_OBJECT_GET_CLASS (el),
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"soundserver-running") ? TRUE : FALSE;
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if (ss == has_p) {
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if (ss) {
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gboolean r;
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g_object_get (G_OBJECT (el), "soundserver-running", &r, NULL);
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if (r) {
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GST_LOG ("%s - soundserver is running",
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GST_PLUGIN_FEATURE (f)->name);
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} else {
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GST_LOG ("%s - Soundserver is not running",
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GST_PLUGIN_FEATURE (f)->name);
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goto next;
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}
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}
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GST_LOG ("Testing %s", GST_PLUGIN_FEATURE (f)->name);
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if (gst_element_set_state (el, GST_STATE_READY) == GST_STATE_SUCCESS) {
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gst_element_set_state (el, GST_STATE_NULL);
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GST_LOG ("This worked!");
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choice = el;
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goto done;
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}
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}
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next:
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gst_object_unref (GST_OBJECT (el));
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}
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}
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if (!ss)
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break;
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ss = FALSE;
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}
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done:
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g_list_free (list);
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return choice;
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}
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static gboolean
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gst_auto_audio_sink_detect (GstAutoAudioSink * sink)
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{
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GstElement *esink;
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GstPad *targetpad;
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if (sink->kid) {
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gst_bin_remove (GST_BIN (sink), sink->kid);
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sink->kid = NULL;
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}
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/* find element */
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GST_DEBUG_OBJECT (sink, "Creating new kid");
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if (!(esink = gst_auto_audio_sink_find_best (sink))) {
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GST_ELEMENT_ERROR (sink, LIBRARY, INIT, (NULL),
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("Failed to find a supported audio sink"));
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return FALSE;
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}
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sink->kid = esink;
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gst_bin_add (GST_BIN (sink), esink);
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/* attach ghost pad */
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GST_DEBUG_OBJECT (sink, "Re-assigning ghostpad");
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targetpad = gst_element_get_pad (sink->kid, "sink");
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gst_ghost_pad_set_target (GST_GHOST_PAD (sink->pad), targetpad);
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gst_object_unref (targetpad);
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GST_DEBUG_OBJECT (sink, "done changing auto audio sink");
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return TRUE;
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}
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static GstElementStateReturn
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gst_auto_audio_sink_change_state (GstElement * element)
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{
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GstAutoAudioSink *sink = GST_AUTO_AUDIO_SINK (element);
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GST_DEBUG_OBJECT (element, "Change state 0x%x",
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GST_STATE_TRANSITION (element));
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switch (GST_STATE_TRANSITION (element)) {
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case GST_STATE_NULL_TO_READY:
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if (!gst_auto_audio_sink_detect (sink))
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return GST_STATE_FAILURE;
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break;
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case GST_STATE_READY_TO_NULL:
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gst_auto_audio_sink_reset (sink);
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break;
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default:
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break;
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}
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return GST_ELEMENT_CLASS (parent_class)->change_state (element);
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}
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