gstreamer/gst/debugutils/gsttestsrcbin.c

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/* GStreamer
*
* Copyright (C) 2018 Igalia S.L. All rights reserved.
* @author: Thibault Saunier <tsaunier@igalia.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
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-testsrcbin
* @title: testsrc
*
* This is a simple GstBin source that wraps audiotestsrc/videotestsrc
* following specification passed in the URI (it implements the #GstURIHandler interface)
* in the form of `testbin://audio+video` or setting the "stream-types" property
* with the same format.
*
* This element also provides GstStream and GstStreamCollection and
* thus the element is useful for testing the new playbin3 infrastructure.
*
* Example pipeline:
* ```
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* gst-launch-1.0 playbin uri=testbin://audio,volume=0.5+video,pattern=white
* ```
*/
#include <gst/gst.h>
#include <gst/base/gstflowcombiner.h>
#include <gst/app/gstappsink.h>
static GstStaticPadTemplate video_src_template =
GST_STATIC_PAD_TEMPLATE ("video_src_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("video/x-raw(ANY)"));
static GstStaticPadTemplate audio_src_template =
GST_STATIC_PAD_TEMPLATE ("audio_src_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("audio/x-raw(ANY);"));
#define GST_TYPE_TEST_SRC_BIN gst_test_src_bin_get_type()
#define GST_TEST_SRC_BIN(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), GST_TYPE_TEST_SRC_BIN, GstTestSrcBin))
typedef struct _GstTestSrcBin GstTestSrcBin;
typedef struct _GstTestSrcBinClass GstTestSrcBinClass;
/* *INDENT-OFF* */
GType gst_test_src_bin_get_type (void) G_GNUC_CONST;
/* *INDENT-ON* */
struct _GstTestSrcBinClass
{
GstBinClass parent_class;
};
struct _GstTestSrcBin
{
GstBin parent;
gchar *uri;
GstStreamCollection *collection;
gint group_id;
GstFlowCombiner *flow_combiner;
};
enum
{
PROP_0,
PROP_STREAM_TYPES,
PROP_LAST
};
#define DEFAULT_TYPES GST_STREAM_TYPE_AUDIO & GST_STREAM_TYPE_VIDEO
static GstURIType
gst_test_src_bin_uri_handler_get_type (GType type)
{
return GST_URI_SRC;
}
static const gchar *const *
gst_test_src_bin_uri_handler_get_protocols (GType type)
{
static const gchar *protocols[] = { "testbin", NULL };
return protocols;
}
static gchar *
gst_test_src_bin_uri_handler_get_uri (GstURIHandler * handler)
{
GstTestSrcBin *self = GST_TEST_SRC_BIN (handler);
gchar *uri;
GST_OBJECT_LOCK (self);
uri = g_strdup (self->uri);
GST_OBJECT_UNLOCK (self);
return uri;
}
typedef struct
{
GstEvent *stream_start;
GstStreamCollection *collection;
} ProbeData;
static ProbeData *
_probe_data_new (GstEvent * stream_start, GstStreamCollection * collection)
{
ProbeData *data = g_malloc0 (sizeof (ProbeData));
data->stream_start = gst_event_ref (stream_start);
data->collection = gst_object_ref (collection);
return data;
}
static void
_probe_data_free (ProbeData * data)
{
gst_event_replace (&data->stream_start, NULL);
gst_object_replace ((GstObject **) & data->collection, NULL);
g_free (data);
}
static GstPadProbeReturn
src_pad_probe_cb (GstPad * pad, GstPadProbeInfo * info, ProbeData * data)
{
GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_STREAM_START:{
gst_event_unref (event);
info->data = gst_event_ref (data->stream_start);
return GST_PAD_PROBE_OK;
}
case GST_EVENT_CAPS:{
if (data->collection) {
GstStreamCollection *collection = data->collection;
/* Make sure the collection is NULL so that when caps get unstickied
* we let them pass through. */
data->collection = NULL;
gst_pad_push_event (pad, gst_event_new_stream_collection (collection));
gst_object_unref (collection);
}
return GST_PAD_PROBE_REMOVE;
}
default:
break;
}
return GST_PAD_PROBE_OK;
}
static GstFlowReturn
gst_test_src_bin_chain (GstPad * pad, GstObject * object, GstBuffer * buffer)
{
GstFlowReturn res, chain_res;
GstTestSrcBin *self = GST_TEST_SRC_BIN (gst_object_get_parent (object));
chain_res = gst_proxy_pad_chain_default (pad, GST_OBJECT (self), buffer);
res = gst_flow_combiner_update_pad_flow (self->flow_combiner, pad, chain_res);
gst_object_unref (self);
if (res == GST_FLOW_FLUSHING)
return chain_res;
return res;
}
static gboolean
gst_test_src_bin_set_element_property (GQuark property_id, const GValue * value,
GObject * element)
{
if (G_VALUE_HOLDS_STRING (value))
gst_util_set_object_arg (element, g_quark_to_string (property_id),
g_value_get_string (value));
else
g_object_set_property (element, g_quark_to_string (property_id), value);
return TRUE;
}
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typedef struct
{
GstEvent *event;
gboolean res;
GstObject *parent;
} ForwardEventData;
static gboolean
forward_seeks (GstElement * element, GstPad * pad, ForwardEventData * data)
{
data->res &=
gst_pad_event_default (pad, data->parent, gst_event_ref (data->event));
return TRUE;
}
static gboolean
gst_test_src_event_function (GstPad * pad, GstObject * parent, GstEvent * event)
{
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:{
ForwardEventData data = { event, TRUE, parent };
gst_element_foreach_src_pad (GST_ELEMENT (parent),
(GstElementForeachPadFunc) forward_seeks, &data);
return data.res;
}
default:
break;
}
return gst_pad_event_default (pad, parent, event);
}
static void
gst_test_src_bin_setup_src (GstTestSrcBin * self, const gchar * srcfactory,
GstStaticPadTemplate * template, GstStreamType stype,
GstStreamCollection * collection, gint * n_stream, GstStructure * props)
{
GstElement *src = gst_element_factory_make (srcfactory, NULL);
GstPad *proxypad, *ghost, *pad = gst_element_get_static_pad (src, "src");
gchar *stream_id = g_strdup_printf ("%s_stream_%d", srcfactory, *n_stream);
gchar *pad_name = g_strdup_printf (template->name_template, *n_stream);
GstStream *stream = gst_stream_new (stream_id, NULL, stype,
(*n_stream == 0) ? GST_STREAM_FLAG_SELECT : GST_STREAM_FLAG_UNSELECT);
GstEvent *stream_start =
gst_event_new_stream_start (gst_stream_get_stream_id (stream));
gst_structure_foreach (props,
(GstStructureForeachFunc) gst_test_src_bin_set_element_property, src);
gst_event_set_stream (stream_start, stream);
gst_event_set_group_id (stream_start, self->group_id);
gst_pad_add_probe (pad, (GstPadProbeType) GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM,
(GstPadProbeCallback) src_pad_probe_cb, _probe_data_new (stream_start,
collection), (GDestroyNotify) _probe_data_free);
gst_stream_collection_add_stream (collection, stream);
g_free (stream_id);
gst_bin_add (GST_BIN (self), src);
ghost =
gst_ghost_pad_new_from_template (pad_name, pad,
gst_static_pad_template_get (template));
proxypad = GST_PAD (gst_proxy_pad_get_internal (GST_PROXY_PAD (ghost)));
gst_flow_combiner_add_pad (self->flow_combiner, ghost);
gst_pad_set_chain_function (proxypad,
(GstPadChainFunction) gst_test_src_bin_chain);
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gst_pad_set_event_function (ghost,
(GstPadEventFunction) gst_test_src_event_function);
gst_object_unref (proxypad);
gst_element_add_pad (GST_ELEMENT (self), ghost);
gst_object_unref (pad);
gst_element_sync_state_with_parent (src);
*n_stream += 1;
}
static void
gst_test_src_bin_remove_child (GValue * val, GstBin * self)
{
GstElement *child = g_value_get_object (val);
gst_bin_remove (self, child);
}
static gboolean
gst_test_src_bin_uri_handler_set_uri (GstURIHandler * handler,
const gchar * uri, GError ** error)
{
GstTestSrcBin *self = GST_TEST_SRC_BIN (handler);
gchar *tmp, *location = gst_uri_get_location (uri);
gint i, n_audio = 0, n_video = 0;
GstStreamCollection *collection = gst_stream_collection_new (NULL);
GstIterator *it;
GstCaps *streams_defs;
for (tmp = location; *tmp != '\0'; tmp++)
if (*tmp == '+')
*tmp = ';';
streams_defs = gst_caps_from_string (location);
g_free (location);
if (!streams_defs)
goto failed;
/* Clear us up */
it = gst_bin_iterate_elements (GST_BIN (self));
while (gst_iterator_foreach (it,
(GstIteratorForeachFunction) gst_test_src_bin_remove_child,
self) == GST_ITERATOR_RESYNC)
gst_iterator_resync (it);
gst_iterator_free (it);
self->group_id = gst_util_group_id_next ();
for (i = 0; i < gst_caps_get_size (streams_defs); i++) {
GstStructure *stream_def = gst_caps_get_structure (streams_defs, i);
if (gst_structure_has_name (stream_def, "video"))
gst_test_src_bin_setup_src (self, "videotestsrc", &video_src_template,
GST_STREAM_TYPE_VIDEO, collection, &n_video, stream_def);
else if (gst_structure_has_name (stream_def, "audio"))
gst_test_src_bin_setup_src (self, "audiotestsrc", &audio_src_template,
GST_STREAM_TYPE_AUDIO, collection, &n_audio, stream_def);
else
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GST_ERROR_OBJECT (self, "Unknown type %s",
gst_structure_get_name (stream_def));
}
if (!n_video && !n_audio)
goto failed;
self->uri = g_strdup (uri);
gst_element_post_message (GST_ELEMENT (self),
gst_message_new_stream_collection (GST_OBJECT (self), collection));
return TRUE;
failed:
if (error)
*error =
g_error_new_literal (GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED,
"No media type specified in the testbin:// URL.");
return FALSE;
}
static void
gst_test_src_bin_uri_handler_init (gpointer g_iface, gpointer unused)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_test_src_bin_uri_handler_get_type;
iface->get_protocols = gst_test_src_bin_uri_handler_get_protocols;
iface->get_uri = gst_test_src_bin_uri_handler_get_uri;
iface->set_uri = gst_test_src_bin_uri_handler_set_uri;
}
/* *INDENT-OFF* */
G_DEFINE_TYPE_WITH_CODE (GstTestSrcBin, gst_test_src_bin, GST_TYPE_BIN,
G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_test_src_bin_uri_handler_init))
/* *INDENT-ON* */
static void
gst_test_src_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstTestSrcBin *self = GST_TEST_SRC_BIN (object);
switch (prop_id) {
case PROP_STREAM_TYPES:
{
gchar *uri = g_strdup_printf ("testbin://%s", g_value_get_string (value));
g_assert (gst_uri_handler_set_uri (GST_URI_HANDLER (self), uri, NULL));
g_free (uri);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_test_src_bin_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstTestSrcBin *self = GST_TEST_SRC_BIN (object);
switch (prop_id) {
case PROP_STREAM_TYPES:
{
gchar *uri = gst_uri_handler_get_uri (GST_URI_HANDLER (self));
if (uri) {
gchar *types = gst_uri_get_location (uri);
g_value_set_string (value, types);
g_free (uri);
g_free (types);
}
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_test_src_bin_change_state (GstElement * element, GstStateChange transition)
{
GstTestSrcBin *self = GST_TEST_SRC_BIN (element);
GstStateChangeReturn result = GST_STATE_CHANGE_FAILURE;
result =
GST_ELEMENT_CLASS (gst_test_src_bin_parent_class)->change_state (element,
transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:{
gst_flow_combiner_reset (self->flow_combiner);
break;
}
default:
break;
}
return result;
}
static void
gst_test_src_bin_finalize (GObject * object)
{
GstTestSrcBin *self = GST_TEST_SRC_BIN (object);
g_free (self->uri);
gst_flow_combiner_free (self->flow_combiner);
}
static void
gst_test_src_bin_init (GstTestSrcBin * self)
{
self->flow_combiner = gst_flow_combiner_new ();
}
static void
gst_test_src_bin_class_init (GstTestSrcBinClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_klass = (GstElementClass *) klass;
gobject_class->finalize = gst_test_src_bin_finalize;
gobject_class->get_property = gst_test_src_bin_get_property;
gobject_class->set_property = gst_test_src_bin_set_property;
/**
* GstTestSrcBin::stream-types:
*
* String describing the stream types to expose, eg. "video+audio".
*/
g_object_class_install_property (gobject_class, PROP_STREAM_TYPES,
g_param_spec_string ("stream-types", "Stream types",
"String describing the stream types to expose, eg. \"video+audio\".",
NULL, (GParamFlags) (G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)));
gstelement_klass->change_state =
GST_DEBUG_FUNCPTR (gst_test_src_bin_change_state);
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&video_src_template));
gst_element_class_add_pad_template (gstelement_klass,
gst_static_pad_template_get (&audio_src_template));
}