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646 lines
18 KiB
C
646 lines
18 KiB
C
/* GStreamer
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* Copyright (C) 2008 Wim Taymans <wim.taymans at gmail.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:rtsp-media-factory-uri
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* @short_description: A factory for URI sources
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* @see_also: #GstRTSPMediaFactory, #GstRTSPMedia
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*
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* This specialized #GstRTSPMediaFactory constructs media pipelines from a URI,
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* given with gst_rtsp_media_factory_uri_set_uri().
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*
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* It will automatically demux and payload the different streams found in the
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* media at URL.
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*
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* Last reviewed on 2013-07-11 (1.0.0)
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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 "rtsp-media-factory-uri.h"
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struct _GstRTSPMediaFactoryURIPrivate
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{
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GMutex lock;
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gchar *uri; /* protected by lock */
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gboolean use_gstpay;
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GstCaps *raw_vcaps;
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GstCaps *raw_acaps;
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GList *demuxers;
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GList *payloaders;
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GList *decoders;
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};
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#define DEFAULT_URI NULL
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#define DEFAULT_USE_GSTPAY FALSE
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enum
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{
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PROP_0,
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PROP_URI,
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PROP_USE_GSTPAY,
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PROP_LAST
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};
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#define RAW_VIDEO_CAPS \
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"video/x-raw"
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#define RAW_AUDIO_CAPS \
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"audio/x-raw"
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static GstStaticCaps raw_video_caps = GST_STATIC_CAPS (RAW_VIDEO_CAPS);
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static GstStaticCaps raw_audio_caps = GST_STATIC_CAPS (RAW_AUDIO_CAPS);
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typedef struct
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{
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GstRTSPMediaFactoryURI *factory;
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guint pt;
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} FactoryData;
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static void
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free_data (FactoryData * data)
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{
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g_object_unref (data->factory);
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g_free (data);
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}
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static const gchar *factory_key = "GstRTSPMediaFactoryURI";
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GST_DEBUG_CATEGORY_STATIC (rtsp_media_factory_uri_debug);
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#define GST_CAT_DEFAULT rtsp_media_factory_uri_debug
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static void gst_rtsp_media_factory_uri_get_property (GObject * object,
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guint propid, GValue * value, GParamSpec * pspec);
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static void gst_rtsp_media_factory_uri_set_property (GObject * object,
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guint propid, const GValue * value, GParamSpec * pspec);
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static void gst_rtsp_media_factory_uri_finalize (GObject * obj);
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static GstElement *rtsp_media_factory_uri_create_element (GstRTSPMediaFactory *
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factory, const GstRTSPUrl * url);
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G_DEFINE_TYPE_WITH_PRIVATE (GstRTSPMediaFactoryURI, gst_rtsp_media_factory_uri,
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GST_TYPE_RTSP_MEDIA_FACTORY);
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static void
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gst_rtsp_media_factory_uri_class_init (GstRTSPMediaFactoryURIClass * klass)
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{
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GObjectClass *gobject_class;
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GstRTSPMediaFactoryClass *mediafactory_class;
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gobject_class = G_OBJECT_CLASS (klass);
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mediafactory_class = GST_RTSP_MEDIA_FACTORY_CLASS (klass);
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gobject_class->get_property = gst_rtsp_media_factory_uri_get_property;
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gobject_class->set_property = gst_rtsp_media_factory_uri_set_property;
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gobject_class->finalize = gst_rtsp_media_factory_uri_finalize;
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/**
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* GstRTSPMediaFactoryURI::uri:
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*
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* The uri of the resource that will be served by this factory.
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*/
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g_object_class_install_property (gobject_class, PROP_URI,
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g_param_spec_string ("uri", "URI",
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"The URI of the resource to stream", DEFAULT_URI,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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/**
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* GstRTSPMediaFactoryURI::use-gstpay:
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*
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* Allow the usage of gstpay in order to avoid decoding of compressed formats
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* without a payloader.
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*/
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g_object_class_install_property (gobject_class, PROP_USE_GSTPAY,
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g_param_spec_boolean ("use-gstpay", "Use gstpay",
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"Use the gstpay payloader to avoid decoding", DEFAULT_USE_GSTPAY,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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mediafactory_class->create_element = rtsp_media_factory_uri_create_element;
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GST_DEBUG_CATEGORY_INIT (rtsp_media_factory_uri_debug, "rtspmediafactoryuri",
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0, "GstRTSPMediaFactoryUri");
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}
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typedef struct
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{
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GList *demux;
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GList *payload;
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GList *decode;
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} FilterData;
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static gboolean
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payloader_filter (GstPluginFeature * feature, FilterData * data)
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{
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const gchar *klass;
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GstElementFactory *fact;
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GList **list = NULL;
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/* we only care about element factories */
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if (G_UNLIKELY (!GST_IS_ELEMENT_FACTORY (feature)))
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return FALSE;
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if (gst_plugin_feature_get_rank (feature) < GST_RANK_MARGINAL)
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return FALSE;
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fact = GST_ELEMENT_FACTORY_CAST (feature);
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klass = gst_element_factory_get_metadata (fact, GST_ELEMENT_METADATA_KLASS);
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if (strstr (klass, "Decoder"))
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list = &data->decode;
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else if (strstr (klass, "Demux"))
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list = &data->demux;
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else if (strstr (klass, "Parser") && strstr (klass, "Codec"))
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list = &data->demux;
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else if (strstr (klass, "Payloader") && strstr (klass, "RTP"))
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list = &data->payload;
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if (list) {
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GST_DEBUG ("adding %s", GST_OBJECT_NAME (fact));
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*list = g_list_prepend (*list, gst_object_ref (fact));
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}
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return FALSE;
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}
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static void
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gst_rtsp_media_factory_uri_init (GstRTSPMediaFactoryURI * factory)
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{
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GstRTSPMediaFactoryURIPrivate *priv =
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gst_rtsp_media_factory_uri_get_instance_private (factory);
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FilterData data = { NULL, NULL, NULL };
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GST_DEBUG_OBJECT (factory, "new");
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factory->priv = priv;
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priv->uri = g_strdup (DEFAULT_URI);
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priv->use_gstpay = DEFAULT_USE_GSTPAY;
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g_mutex_init (&priv->lock);
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/* get the feature list using the filter */
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gst_registry_feature_filter (gst_registry_get (), (GstPluginFeatureFilter)
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payloader_filter, FALSE, &data);
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/* sort */
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priv->demuxers =
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g_list_sort (data.demux, gst_plugin_feature_rank_compare_func);
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priv->payloaders =
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g_list_sort (data.payload, gst_plugin_feature_rank_compare_func);
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priv->decoders =
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g_list_sort (data.decode, gst_plugin_feature_rank_compare_func);
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priv->raw_vcaps = gst_static_caps_get (&raw_video_caps);
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priv->raw_acaps = gst_static_caps_get (&raw_audio_caps);
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}
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static void
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gst_rtsp_media_factory_uri_finalize (GObject * obj)
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{
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GstRTSPMediaFactoryURI *factory = GST_RTSP_MEDIA_FACTORY_URI (obj);
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GstRTSPMediaFactoryURIPrivate *priv = factory->priv;
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GST_DEBUG_OBJECT (factory, "finalize");
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g_free (priv->uri);
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gst_plugin_feature_list_free (priv->demuxers);
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gst_plugin_feature_list_free (priv->payloaders);
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gst_plugin_feature_list_free (priv->decoders);
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gst_caps_unref (priv->raw_vcaps);
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gst_caps_unref (priv->raw_acaps);
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g_mutex_clear (&priv->lock);
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G_OBJECT_CLASS (gst_rtsp_media_factory_uri_parent_class)->finalize (obj);
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}
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static void
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gst_rtsp_media_factory_uri_get_property (GObject * object, guint propid,
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GValue * value, GParamSpec * pspec)
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{
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GstRTSPMediaFactoryURI *factory = GST_RTSP_MEDIA_FACTORY_URI (object);
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GstRTSPMediaFactoryURIPrivate *priv = factory->priv;
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switch (propid) {
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case PROP_URI:
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g_value_take_string (value, gst_rtsp_media_factory_uri_get_uri (factory));
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break;
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case PROP_USE_GSTPAY:
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g_value_set_boolean (value, priv->use_gstpay);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, propid, pspec);
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}
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}
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static void
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gst_rtsp_media_factory_uri_set_property (GObject * object, guint propid,
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const GValue * value, GParamSpec * pspec)
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{
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GstRTSPMediaFactoryURI *factory = GST_RTSP_MEDIA_FACTORY_URI (object);
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GstRTSPMediaFactoryURIPrivate *priv = factory->priv;
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switch (propid) {
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case PROP_URI:
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gst_rtsp_media_factory_uri_set_uri (factory, g_value_get_string (value));
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break;
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case PROP_USE_GSTPAY:
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priv->use_gstpay = g_value_get_boolean (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, propid, pspec);
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}
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}
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/**
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* gst_rtsp_media_factory_uri_new:
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*
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* Create a new #GstRTSPMediaFactoryURI instance.
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*
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* Returns: (transfer full): a new #GstRTSPMediaFactoryURI object.
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*/
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GstRTSPMediaFactoryURI *
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gst_rtsp_media_factory_uri_new (void)
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{
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GstRTSPMediaFactoryURI *result;
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result = g_object_new (GST_TYPE_RTSP_MEDIA_FACTORY_URI, NULL);
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return result;
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}
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/**
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* gst_rtsp_media_factory_uri_set_uri:
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* @factory: a #GstRTSPMediaFactory
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* @uri: the uri the stream
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*
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* Set the URI of the resource that will be streamed by this factory.
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*/
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void
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gst_rtsp_media_factory_uri_set_uri (GstRTSPMediaFactoryURI * factory,
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const gchar * uri)
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{
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GstRTSPMediaFactoryURIPrivate *priv;
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g_return_if_fail (GST_IS_RTSP_MEDIA_FACTORY_URI (factory));
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g_return_if_fail (uri != NULL);
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priv = factory->priv;
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g_mutex_lock (&priv->lock);
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g_free (priv->uri);
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priv->uri = g_strdup (uri);
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g_mutex_unlock (&priv->lock);
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}
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/**
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* gst_rtsp_media_factory_uri_get_uri:
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* @factory: a #GstRTSPMediaFactory
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*
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* Get the URI that will provide media for this factory.
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*
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* Returns: (transfer full): the configured URI. g_free() after usage.
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*/
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gchar *
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gst_rtsp_media_factory_uri_get_uri (GstRTSPMediaFactoryURI * factory)
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{
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GstRTSPMediaFactoryURIPrivate *priv;
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gchar *result;
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g_return_val_if_fail (GST_IS_RTSP_MEDIA_FACTORY_URI (factory), NULL);
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priv = factory->priv;
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g_mutex_lock (&priv->lock);
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result = g_strdup (priv->uri);
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g_mutex_unlock (&priv->lock);
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return result;
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}
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static GstElementFactory *
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find_payloader (GstRTSPMediaFactoryURI * urifact, GstCaps * caps)
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{
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GstRTSPMediaFactoryURIPrivate *priv = urifact->priv;
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GList *list;
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GstElementFactory *factory = NULL;
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gboolean autoplug_more = FALSE;
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/* first find a demuxer that can link */
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list = gst_element_factory_list_filter (priv->demuxers, caps,
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GST_PAD_SINK, FALSE);
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if (list) {
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GstStructure *structure = gst_caps_get_structure (caps, 0);
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gboolean parsed = FALSE;
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gint mpegversion = 0;
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if (!gst_structure_get_boolean (structure, "parsed", &parsed) &&
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gst_structure_has_name (structure, "audio/mpeg") &&
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gst_structure_get_int (structure, "mpegversion", &mpegversion) &&
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(mpegversion == 2 || mpegversion == 4)) {
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/* for AAC it's framed=true instead of parsed=true */
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gst_structure_get_boolean (structure, "framed", &parsed);
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}
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/* Avoid plugging parsers in a loop. This is not 100% correct, as some
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* parsers don't set parsed=true in caps. We should do something like
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* decodebin does and track decode chains and elements plugged in those
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* chains...
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*/
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if (parsed) {
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GList *walk;
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const gchar *klass;
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for (walk = list; walk; walk = walk->next) {
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factory = GST_ELEMENT_FACTORY (walk->data);
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klass = gst_element_factory_get_metadata (factory,
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GST_ELEMENT_METADATA_KLASS);
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if (strstr (klass, "Parser"))
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/* caps have parsed=true, so skip this parser to avoid loops */
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continue;
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autoplug_more = TRUE;
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break;
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}
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} else {
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/* caps don't have parsed=true set and we have a demuxer/parser */
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autoplug_more = TRUE;
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}
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gst_plugin_feature_list_free (list);
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}
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if (autoplug_more)
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/* we have a demuxer, try that one first */
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return NULL;
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/* no demuxer try a depayloader */
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list = gst_element_factory_list_filter (priv->payloaders, caps,
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GST_PAD_SINK, FALSE);
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if (list == NULL) {
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if (priv->use_gstpay) {
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/* no depayloader or parser/demuxer, use gstpay when allowed */
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factory = gst_element_factory_find ("rtpgstpay");
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} else {
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/* no depayloader, try a decoder, we'll get to a payloader for a decoded
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* video or audio format, worst case. */
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list = gst_element_factory_list_filter (priv->decoders, caps,
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GST_PAD_SINK, FALSE);
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if (list != NULL) {
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/* we have a decoder, try that one first */
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gst_plugin_feature_list_free (list);
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return NULL;
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}
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}
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}
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if (list != NULL) {
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factory = GST_ELEMENT_FACTORY_CAST (list->data);
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g_object_ref (factory);
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gst_plugin_feature_list_free (list);
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}
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return factory;
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}
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static gboolean
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autoplug_continue_cb (GstElement * uribin, GstPad * pad, GstCaps * caps,
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GstElement * element)
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{
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FactoryData *data;
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GstElementFactory *factory;
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GST_DEBUG ("found pad %s:%s of caps %" GST_PTR_FORMAT,
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GST_DEBUG_PAD_NAME (pad), caps);
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data = g_object_get_data (G_OBJECT (element), factory_key);
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if (!(factory = find_payloader (data->factory, caps)))
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goto no_factory;
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/* we found a payloader, stop autoplugging so we can plug the
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* payloader. */
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GST_DEBUG ("found factory %s",
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gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
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gst_object_unref (factory);
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return FALSE;
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/* ERRORS */
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no_factory:
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{
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/* no payloader, continue autoplugging */
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GST_DEBUG ("no payloader found");
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return TRUE;
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}
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}
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static void
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pad_added_cb (GstElement * uribin, GstPad * pad, GstElement * element)
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{
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GstRTSPMediaFactoryURI *urifact;
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GstRTSPMediaFactoryURIPrivate *priv;
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FactoryData *data;
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GstElementFactory *factory;
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GstElement *payloader;
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GstCaps *caps;
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GstPad *sinkpad, *srcpad, *ghostpad;
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GstElement *convert;
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gchar *padname, *payloader_name;
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GST_DEBUG ("added pad %s:%s", GST_DEBUG_PAD_NAME (pad));
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/* link the element now and expose the pad */
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data = g_object_get_data (G_OBJECT (element), factory_key);
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urifact = data->factory;
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priv = urifact->priv;
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/* ref to make refcounting easier later */
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gst_object_ref (pad);
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padname = gst_pad_get_name (pad);
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/* get pad caps first, then call get_caps, then fail */
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if ((caps = gst_pad_get_current_caps (pad)) == NULL)
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if ((caps = gst_pad_query_caps (pad, NULL)) == NULL)
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goto no_caps;
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/* check for raw caps */
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if (gst_caps_can_intersect (caps, priv->raw_vcaps)) {
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/* we have raw video caps, insert converter */
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convert = gst_element_factory_make ("videoconvert", NULL);
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} else if (gst_caps_can_intersect (caps, priv->raw_acaps)) {
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/* we have raw audio caps, insert converter */
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convert = gst_element_factory_make ("audioconvert", NULL);
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} else {
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convert = NULL;
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}
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if (convert) {
|
|
gst_bin_add (GST_BIN_CAST (element), convert);
|
|
gst_element_set_state (convert, GST_STATE_PLAYING);
|
|
|
|
sinkpad = gst_element_get_static_pad (convert, "sink");
|
|
gst_pad_link (pad, sinkpad);
|
|
gst_object_unref (sinkpad);
|
|
|
|
/* unref old pad, we reffed before */
|
|
gst_object_unref (pad);
|
|
gst_caps_unref (caps);
|
|
|
|
/* continue with new pad and caps */
|
|
pad = gst_element_get_static_pad (convert, "src");
|
|
if ((caps = gst_pad_get_current_caps (pad)) == NULL)
|
|
if ((caps = gst_pad_query_caps (pad, NULL)) == NULL)
|
|
goto no_caps;
|
|
}
|
|
|
|
if (!(factory = find_payloader (urifact, caps)))
|
|
goto no_factory;
|
|
|
|
gst_caps_unref (caps);
|
|
|
|
/* we have a payloader now */
|
|
GST_DEBUG ("found payloader factory %s",
|
|
gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
|
|
|
|
payloader_name = g_strdup_printf ("pay_%s", padname);
|
|
payloader = gst_element_factory_create (factory, payloader_name);
|
|
g_free (payloader_name);
|
|
if (payloader == NULL)
|
|
goto no_payloader;
|
|
|
|
g_object_set (payloader, "pt", data->pt, NULL);
|
|
data->pt++;
|
|
|
|
if (g_object_class_find_property (G_OBJECT_GET_CLASS (payloader),
|
|
"buffer-list"))
|
|
g_object_set (payloader, "buffer-list", TRUE, NULL);
|
|
|
|
/* add the payloader to the pipeline */
|
|
gst_bin_add (GST_BIN_CAST (element), payloader);
|
|
gst_element_set_state (payloader, GST_STATE_PLAYING);
|
|
|
|
/* link the pad to the sinkpad of the payloader */
|
|
sinkpad = gst_element_get_static_pad (payloader, "sink");
|
|
gst_pad_link (pad, sinkpad);
|
|
gst_object_unref (sinkpad);
|
|
gst_object_unref (pad);
|
|
|
|
/* now expose the srcpad of the payloader as a ghostpad with the same name
|
|
* as the uridecodebin pad name. */
|
|
srcpad = gst_element_get_static_pad (payloader, "src");
|
|
ghostpad = gst_ghost_pad_new (padname, srcpad);
|
|
gst_object_unref (srcpad);
|
|
g_free (padname);
|
|
|
|
gst_pad_set_active (ghostpad, TRUE);
|
|
gst_element_add_pad (element, ghostpad);
|
|
|
|
return;
|
|
|
|
/* ERRORS */
|
|
no_caps:
|
|
{
|
|
GST_WARNING ("could not get caps from pad");
|
|
g_free (padname);
|
|
gst_object_unref (pad);
|
|
return;
|
|
}
|
|
no_factory:
|
|
{
|
|
GST_DEBUG ("no payloader found");
|
|
g_free (padname);
|
|
gst_caps_unref (caps);
|
|
gst_object_unref (pad);
|
|
return;
|
|
}
|
|
no_payloader:
|
|
{
|
|
GST_ERROR ("could not create payloader from factory");
|
|
g_free (padname);
|
|
gst_caps_unref (caps);
|
|
gst_object_unref (pad);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
no_more_pads_cb (GstElement * uribin, GstElement * element)
|
|
{
|
|
GST_DEBUG ("no-more-pads");
|
|
gst_element_no_more_pads (element);
|
|
}
|
|
|
|
static GstElement *
|
|
rtsp_media_factory_uri_create_element (GstRTSPMediaFactory * factory,
|
|
const GstRTSPUrl * url)
|
|
{
|
|
GstRTSPMediaFactoryURIPrivate *priv;
|
|
GstElement *topbin, *element, *uribin;
|
|
GstRTSPMediaFactoryURI *urifact;
|
|
FactoryData *data;
|
|
|
|
urifact = GST_RTSP_MEDIA_FACTORY_URI_CAST (factory);
|
|
priv = urifact->priv;
|
|
|
|
GST_LOG ("creating element");
|
|
|
|
topbin = gst_bin_new ("GstRTSPMediaFactoryURI");
|
|
g_assert (topbin != NULL);
|
|
|
|
/* our bin will dynamically expose payloaded pads */
|
|
element = gst_bin_new ("dynpay0");
|
|
g_assert (element != NULL);
|
|
|
|
uribin = gst_element_factory_make ("uridecodebin", "uribin");
|
|
if (uribin == NULL)
|
|
goto no_uridecodebin;
|
|
|
|
g_object_set (uribin, "uri", priv->uri, NULL);
|
|
|
|
/* keep factory data around */
|
|
data = g_new0 (FactoryData, 1);
|
|
data->factory = g_object_ref (urifact);
|
|
data->pt = 96;
|
|
|
|
g_object_set_data_full (G_OBJECT (element), factory_key,
|
|
data, (GDestroyNotify) free_data);
|
|
|
|
/* connect to the signals */
|
|
g_signal_connect (uribin, "autoplug-continue",
|
|
(GCallback) autoplug_continue_cb, element);
|
|
g_signal_connect (uribin, "pad-added", (GCallback) pad_added_cb, element);
|
|
g_signal_connect (uribin, "no-more-pads", (GCallback) no_more_pads_cb,
|
|
element);
|
|
|
|
gst_bin_add (GST_BIN_CAST (element), uribin);
|
|
gst_bin_add (GST_BIN_CAST (topbin), element);
|
|
|
|
return topbin;
|
|
|
|
no_uridecodebin:
|
|
{
|
|
g_critical ("can't create uridecodebin element");
|
|
gst_object_unref (element);
|
|
return NULL;
|
|
}
|
|
}
|