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/* GStreamer
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* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* (c) 2006 Jan Schmidt <thaytan@noraisin.net>
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* (c) 2008 Stefan Kost <ensonic@users.sf.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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/**
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* SECTION:element-autoaudiosrc
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* @see_also: autovideosrc, alsasrc, osssrc
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*
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* autoaudiosrc is an audio source that automatically detects an appropriate
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* audio source to use. It does so by scanning the registry for all elements
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* that have <quote>Source</quote> and <quote>Audio</quote> in the class field
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* of their element information, and also have a non-zero autoplugging rank.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch -v -m autoaudiosrc ! audioconvert ! audioresample ! autoaudiosink
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* ]|
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* </refsect2>
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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 "gstautoaudiosrc.h"
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#include "gstautodetect.h"
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/* Properties */
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enum
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{
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PROP_0,
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PROP_CAPS,
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};
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static GstStateChangeReturn
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gst_auto_audio_src_change_state (GstElement * element,
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GstStateChange transition);
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static void gst_auto_audio_src_dispose (GstAutoAudioSrc * src);
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static void gst_auto_audio_src_clear_kid (GstAutoAudioSrc * src);
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static void gst_auto_audio_src_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_auto_audio_src_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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GST_BOILERPLATE (GstAutoAudioSrc, gst_auto_audio_src, GstBin, GST_TYPE_BIN);
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static const GstElementDetails gst_auto_audio_src_details =
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GST_ELEMENT_DETAILS ("Auto audio source",
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"Source/Audio",
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"Wrapper audio source for automatically detected audio source",
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"Ronald Bultje <rbultje@ronald.bitfreak.net>\n"
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"Jan Schmidt <thaytan@noraisin.net>\n"
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"Stefan Kost <ensonic@users.sf.net>");
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static void
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gst_auto_audio_src_base_init (gpointer klass)
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{
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GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (eklass,
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gst_static_pad_template_get (&src_template));
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gst_element_class_set_details (eklass, &gst_auto_audio_src_details);
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}
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static void
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gst_auto_audio_src_class_init (GstAutoAudioSrcClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *eklass;
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gobject_class = G_OBJECT_CLASS (klass);
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eklass = GST_ELEMENT_CLASS (klass);
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gobject_class->dispose =
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(GObjectFinalizeFunc) GST_DEBUG_FUNCPTR (gst_auto_audio_src_dispose);
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eklass->change_state = GST_DEBUG_FUNCPTR (gst_auto_audio_src_change_state);
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gobject_class->set_property =
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GST_DEBUG_FUNCPTR (gst_auto_audio_src_set_property);
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gobject_class->get_property =
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GST_DEBUG_FUNCPTR (gst_auto_audio_src_get_property);
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/**
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* GstAutoAudioSrc:filter-caps
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*
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* This property will filter out candidate sinks that can handle the specified
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* caps. By default only audio sinks that support raw floating point and
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* integer audio are selected.
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*
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* This property can only be set before the element goes to the READY state.
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*
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* Since: 0.10.14
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**/
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g_object_class_install_property (gobject_class, PROP_CAPS,
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g_param_spec_boxed ("filter-caps", "Filter caps",
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"Filter sink candidates using these caps.", GST_TYPE_CAPS,
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G_PARAM_READWRITE));
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}
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static void
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gst_auto_audio_src_dispose (GstAutoAudioSrc * sink)
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{
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gst_auto_audio_src_clear_kid (sink);
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if (sink->filter_caps)
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gst_caps_unref (sink->filter_caps);
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sink->filter_caps = NULL;
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G_OBJECT_CLASS (parent_class)->dispose ((GObject *) sink);
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}
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static void
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gst_auto_audio_src_clear_kid (GstAutoAudioSrc * sink)
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{
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if (sink->kid) {
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gst_element_set_state (sink->kid, GST_STATE_NULL);
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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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}
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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_src_reset (GstAutoAudioSrc * src)
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{
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GstPad *targetpad;
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gst_auto_audio_src_clear_kid (src);
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/* fakesink placeholder */
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src->kid = gst_element_factory_make ("fakesrc", "tempsrc");
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gst_bin_add (GST_BIN (src), src->kid);
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/* pad */
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targetpad = gst_element_get_static_pad (src->kid, "src");
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gst_ghost_pad_set_target (GST_GHOST_PAD (src->pad), targetpad);
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gst_object_unref (targetpad);
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}
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static GstStaticCaps raw_caps =
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GST_STATIC_CAPS ("audio/x-raw-int; audio/x-raw-float");
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static void
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gst_auto_audio_src_init (GstAutoAudioSrc * src, GstAutoAudioSrcClass * g_class)
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{
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src->pad = gst_ghost_pad_new_no_target ("src", GST_PAD_SRC);
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gst_element_add_pad (GST_ELEMENT (src), src->pad);
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gst_auto_audio_src_reset (src);
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/* set the default raw audio caps */
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src->filter_caps = gst_static_caps_get (&raw_caps);
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/* mark as source */
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GST_OBJECT_FLAG_UNSET (src, GST_ELEMENT_IS_SINK);
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}
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186 |
static gboolean
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gst_auto_audio_src_factory_filter (GstPluginFeature * feature, gpointer data)
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188 |
{
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guint rank;
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190 |
const gchar *klass;
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191 |
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192 |
/* 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 (!(strstr (klass, "Source") && strstr (klass, "Audio")))
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return FALSE;
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200 |
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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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208 |
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209 |
static gint
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gst_auto_audio_src_compare_ranks (GstPluginFeature * f1, GstPluginFeature * f2)
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{
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gint diff;
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213 |
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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_src_create_element_with_pretty_name (GstAutoAudioSrc * src,
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GstElementFactory * factory)
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{
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225 |
GstElement *element;
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226 |
gchar *name, *marker;
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227 |
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marker = g_strdup (GST_PLUGIN_FEATURE (factory)->name);
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229 |
if (g_str_has_suffix (marker, "src"))
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marker[strlen (marker) - 4] = '\0';
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231 |
if (g_str_has_prefix (marker, "gst"))
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g_memmove (marker, marker + 3, strlen (marker + 3) + 1);
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name = g_strdup_printf ("%s-actual-src-%s", GST_OBJECT_NAME (src), marker);
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234 |
g_free (marker);
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235 |
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236 |
element = gst_element_factory_create (factory, name);
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237 |
g_free (name);
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238 |
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239 |
return element;
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240 |
}
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241 |
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242 |
static GstElement *
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243 |
gst_auto_audio_src_find_best (GstAutoAudioSrc * src)
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244 |
{
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245 |
GList *list, *item;
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246 |
GstElement *choice = NULL;
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247 |
GstMessage *message = NULL;
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248 |
GSList *errors = NULL;
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249 |
GstBus *bus = gst_bus_new ();
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250 |
GstPad *el_pad = NULL;
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251 |
GstCaps *el_caps = NULL, *intersect = NULL;
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252 |
gboolean no_match = TRUE;
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253 |
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254 |
list = gst_registry_feature_filter (gst_registry_get_default (),
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255 |
(GstPluginFeatureFilter) gst_auto_audio_src_factory_filter, FALSE, src);
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256 |
list = g_list_sort (list, (GCompareFunc) gst_auto_audio_src_compare_ranks);
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257 |
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258 |
/* We don't treat sound server sources special. Our policy is that sound
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259 |
* server sources that have a rank must not auto-spawn a daemon under any
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260 |
* circumstances, so there's nothing for us to worry about here */
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261 |
GST_LOG_OBJECT (src, "Trying to find usable audio devices ...");
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262 |
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263 |
for (item = list; item != NULL; item = item->next) {
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264 |
GstElementFactory *f = GST_ELEMENT_FACTORY (item->data);
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265 |
GstElement *el;
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266 |
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267 |
if ((el = gst_auto_audio_src_create_element_with_pretty_name (src, f))) {
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268 |
GstStateChangeReturn ret;
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269 |
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|
270 |
GST_DEBUG_OBJECT (src, "Testing %s", GST_PLUGIN_FEATURE (f)->name);
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271 |
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272 |
/* If autoAudioSrc has been provided with filter caps,
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|
273 |
* accept only sources that match with the filter caps */
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|
274 |
if (src->filter_caps) {
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|
275 |
el_pad = gst_element_get_static_pad (GST_ELEMENT (el), "src");
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|
276 |
el_caps = gst_pad_get_caps (el_pad);
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|
277 |
gst_object_unref (el_pad);
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|
278 |
GST_DEBUG_OBJECT (src,
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|
279 |
"Checking caps: %" GST_PTR_FORMAT " vs. %" GST_PTR_FORMAT,
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|
280 |
src->filter_caps, el_caps);
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|
281 |
intersect = gst_caps_intersect (src->filter_caps, el_caps);
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|
282 |
no_match = gst_caps_is_empty (intersect);
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|
283 |
gst_caps_unref (el_caps);
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|
284 |
gst_caps_unref (intersect);
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|
285 |
|
|
286 |
if (no_match) {
|
|
287 |
GST_DEBUG_OBJECT (src, "Incompatible caps");
|
|
288 |
gst_object_unref (el);
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|
289 |
continue;
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|
290 |
} else {
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|
291 |
GST_DEBUG_OBJECT (src, "Found compatible caps");
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|
292 |
}
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|
293 |
}
|
|
294 |
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|
295 |
gst_element_set_bus (el, bus);
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|
296 |
ret = gst_element_set_state (el, GST_STATE_READY);
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|
297 |
if (ret == GST_STATE_CHANGE_SUCCESS) {
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|
298 |
GST_DEBUG_OBJECT (src, "This worked!");
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|
299 |
choice = el;
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|
300 |
break;
|
|
301 |
}
|
|
302 |
|
|
303 |
/* collect all error messages */
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|
304 |
while ((message = gst_bus_pop_filtered (bus, GST_MESSAGE_ERROR))) {
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|
305 |
GST_DEBUG_OBJECT (src, "error message %" GST_PTR_FORMAT, message);
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|
306 |
errors = g_slist_append (errors, message);
|
|
307 |
}
|
|
308 |
|
|
309 |
gst_element_set_state (el, GST_STATE_NULL);
|
|
310 |
gst_object_unref (el);
|
|
311 |
}
|
|
312 |
}
|
|
313 |
|
|
314 |
GST_DEBUG_OBJECT (src, "done trying");
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|
315 |
if (!choice) {
|
|
316 |
if (errors) {
|
|
317 |
/* FIXME: we forward the first error for now; but later on it might make
|
|
318 |
* sense to actually analyse them */
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|
319 |
gst_message_ref (GST_MESSAGE (errors->data));
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|
320 |
GST_DEBUG_OBJECT (src, "reposting message %p", errors->data);
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|
321 |
gst_element_post_message (GST_ELEMENT (src), GST_MESSAGE (errors->data));
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|
322 |
} else {
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|
323 |
/* send warning message to application and use a fakesrc */
|
|
324 |
GST_ELEMENT_WARNING (src, RESOURCE, NOT_FOUND, (NULL),
|
|
325 |
("Failed to find a usable audio source"));
|
|
326 |
choice = gst_element_factory_make ("fakesrc", "fake-audio-src");
|
|
327 |
if (g_object_class_find_property (G_OBJECT_GET_CLASS (choice), "sync"))
|
|
328 |
g_object_set (choice, "sync", TRUE, NULL);
|
|
329 |
gst_element_set_state (choice, GST_STATE_READY);
|
|
330 |
}
|
|
331 |
}
|
|
332 |
gst_object_unref (bus);
|
|
333 |
gst_plugin_feature_list_free (list);
|
|
334 |
g_slist_foreach (errors, (GFunc) gst_mini_object_unref, NULL);
|
|
335 |
g_slist_free (errors);
|
|
336 |
|
|
337 |
return choice;
|
|
338 |
}
|
|
339 |
|
|
340 |
static gboolean
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|
341 |
gst_auto_audio_src_detect (GstAutoAudioSrc * src)
|
|
342 |
{
|
|
343 |
GstElement *esrc;
|
|
344 |
GstPad *targetpad;
|
|
345 |
|
|
346 |
gst_auto_audio_src_clear_kid (src);
|
|
347 |
|
|
348 |
/* find element */
|
|
349 |
GST_DEBUG_OBJECT (src, "Creating new kid");
|
|
350 |
if (!(esrc = gst_auto_audio_src_find_best (src)))
|
|
351 |
goto no_src;
|
|
352 |
|
|
353 |
src->kid = esrc;
|
|
354 |
/* Ensure the child is brought up to the right state to match the parent
|
|
355 |
* although it's currently always in READY and
|
|
356 |
* we're always doing NULL->READY. */
|
|
357 |
if (GST_STATE (src->kid) < GST_STATE (src))
|
|
358 |
gst_element_set_state (src->kid, GST_STATE (src));
|
|
359 |
|
|
360 |
gst_bin_add (GST_BIN (src), esrc);
|
|
361 |
|
|
362 |
/* attach ghost pad */
|
|
363 |
GST_DEBUG_OBJECT (src, "Re-assigning ghostpad");
|
|
364 |
targetpad = gst_element_get_static_pad (src->kid, "src");
|
|
365 |
if (!gst_ghost_pad_set_target (GST_GHOST_PAD (src->pad), targetpad))
|
|
366 |
goto target_failed;
|
|
367 |
|
|
368 |
gst_object_unref (targetpad);
|
|
369 |
GST_DEBUG_OBJECT (src, "done changing auto audio source");
|
|
370 |
|
|
371 |
return TRUE;
|
|
372 |
|
|
373 |
/* ERRORS */
|
|
374 |
no_src:
|
|
375 |
{
|
|
376 |
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
|
|
377 |
("Failed to find a supported audio source"));
|
|
378 |
return FALSE;
|
|
379 |
}
|
|
380 |
target_failed:
|
|
381 |
{
|
|
382 |
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
|
|
383 |
("Failed to set target pad"));
|
|
384 |
gst_object_unref (targetpad);
|
|
385 |
return FALSE;
|
|
386 |
}
|
|
387 |
}
|
|
388 |
|
|
389 |
static GstStateChangeReturn
|
|
390 |
gst_auto_audio_src_change_state (GstElement * element,
|
|
391 |
GstStateChange transition)
|
|
392 |
{
|
|
393 |
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
|
|
394 |
GstAutoAudioSrc *src = GST_AUTO_AUDIO_SRC (element);
|
|
395 |
|
|
396 |
switch (transition) {
|
|
397 |
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
398 |
if (!gst_auto_audio_src_detect (src))
|
|
399 |
return GST_STATE_CHANGE_FAILURE;
|
|
400 |
break;
|
|
401 |
default:
|
|
402 |
break;
|
|
403 |
}
|
|
404 |
|
|
405 |
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
406 |
if (ret == GST_STATE_CHANGE_FAILURE)
|
|
407 |
return ret;
|
|
408 |
|
|
409 |
switch (transition) {
|
|
410 |
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
411 |
gst_auto_audio_src_reset (src);
|
|
412 |
break;
|
|
413 |
default:
|
|
414 |
break;
|
|
415 |
}
|
|
416 |
|
|
417 |
return ret;
|
|
418 |
}
|
|
419 |
|
|
420 |
static void
|
|
421 |
gst_auto_audio_src_set_property (GObject * object, guint prop_id,
|
|
422 |
const GValue * value, GParamSpec * pspec)
|
|
423 |
{
|
|
424 |
GstAutoAudioSrc *src = GST_AUTO_AUDIO_SRC (object);
|
|
425 |
|
|
426 |
switch (prop_id) {
|
|
427 |
case PROP_CAPS:
|
|
428 |
if (src->filter_caps)
|
|
429 |
gst_caps_unref (src->filter_caps);
|
|
430 |
src->filter_caps = gst_caps_copy (gst_value_get_caps (value));
|
|
431 |
break;
|
|
432 |
default:
|
|
433 |
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
434 |
break;
|
|
435 |
}
|
|
436 |
}
|
|
437 |
|
|
438 |
static void
|
|
439 |
gst_auto_audio_src_get_property (GObject * object, guint prop_id,
|
|
440 |
GValue * value, GParamSpec * pspec)
|
|
441 |
{
|
|
442 |
GstAutoAudioSrc *src = GST_AUTO_AUDIO_SRC (object);
|
|
443 |
|
|
444 |
switch (prop_id) {
|
|
445 |
case PROP_CAPS:{
|
|
446 |
gst_value_set_caps (value, src->filter_caps);
|
|
447 |
break;
|
|
448 |
}
|
|
449 |
default:
|
|
450 |
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
451 |
break;
|
|
452 |
}
|
|
453 |
}
|