gstreamer/gst/rtsp-server/rtsp-media-factory-uri.c

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