gstreamer/subprojects/gst-plugins-bad/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.
*
* ## The `uri` format
*
* `testbin://<stream1 definition>[+<stream2 definition>]`
*
* With **<stream definition>**:
*
* `<media-type>,<element-properties>,[caps=<media caps>]`
*
* where:
*
* - `<media-type>`: Adds a new source of type `<media-type>`. Supported
* values:
* * `video`: A #videotestsrc element will be used
* * `audio`: An #audiotestsrc will be used
* you can use it as many time as wanted to expose new streams.
* - `<element-properties>`: `key=value` list of properties to be set on the
* source element. See #videotestsrc properties for the video case and
* #audiotestsrc properties for the audio case.
* - `<media caps>`: Caps to be set in the #capsfilter that follows source elements
* for example to force the video source to output a full HD stream, you can use
* `video/x-raw,width=1920,height=1080`.
*
* Note that stream definitions are interpreted as serialized #GstStructure.
*
* ## Examples pipeline:
*
* ### One audio stream with volume=0.5 and a white video stream in full HD at 30fps
*
* ```
* gst-launch-1.0 playbin3 uri="testbin://audio,volume=0.5+video,pattern=white,caps=[video/x-raw,width=1920,height=1080,framerate=30/1]"
* ```
* ### Single full HD stream
*
* ```
* gst-launch-1.0 playbin3 uri="testbin://video,pattern=green,caps=[video/x-raw,width=1920,height=1080,framerate=30/1]"
* ```
*
* ### Two audio streams
*
* ```
* gst-launch-1.0 playbin3 uri="testbin://audio+audio"
* ```
*/
#include <gst/gst.h>
#include <gst/base/gstflowcombiner.h>
#include <gst/app/gstappsink.h>
#include "gstdebugutilsbadelements.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;
gint group_id;
GstFlowCombiner *flow_combiner;
GstCaps *streams_def;
GstCaps *next_streams_def;
gboolean expose_sources_async;
};
enum
{
PROP_0,
PROP_STREAM_TYPES,
PROP_EXPOSE_SOURCES_ASYNC,
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 = 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);
GST_OBJECT_LOCK (self);
res = gst_flow_combiner_update_pad_flow (self->flow_combiner, pad, chain_res);
GST_OBJECT_UNLOCK (self);
gst_object_unref (self);
if (res == GST_FLOW_FLUSHING)
return chain_res;
if (res == GST_FLOW_NOT_LINKED)
GST_WARNING_OBJECT (pad,
"all testsrcbin pads not linked, returning not-linked.");
return res;
}
static gboolean
gst_test_src_bin_set_element_property (GQuark property_id, const GValue * value,
GObject * element)
{
if (property_id == g_quark_from_static_string ("__streamobj__"))
return TRUE;
if (property_id == g_quark_from_static_string ("caps"))
return TRUE;
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_RECONFIGURE:{
GstTestSrcBin *self = GST_TEST_SRC_BIN (parent);
GST_OBJECT_LOCK (self);
gst_flow_combiner_reset (self->flow_combiner);
GST_OBJECT_UNLOCK (self);
break;
}
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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 gboolean
gst_test_src_bin_setup_src (GstTestSrcBin * self, const gchar * srcfactory,
GstStaticPadTemplate * template, GstStreamType stype,
GstStreamCollection * collection, gint * n_stream, GstStructure * props,
GError ** error)
{
GstElement *src;
GstElement *capsfilter;
GstPad *proxypad, *ghost, *pad;
gchar *stream_id;
gchar *pad_name;
GstCaps *caps = NULL;
GstStream *stream;
GstEvent *stream_start;
GstPadTemplate *templ;
const GValue *caps_value = gst_structure_get_value (props, "caps");
if (caps_value) {
if (GST_VALUE_HOLDS_CAPS (caps_value)) {
caps = gst_caps_copy (gst_value_get_caps (caps_value));
} else if (GST_VALUE_HOLDS_STRUCTURE (caps_value)) {
caps =
gst_caps_new_full (gst_structure_copy (gst_value_get_structure
(caps_value)), NULL);
} else if (G_VALUE_HOLDS_STRING (caps_value)) {
caps = gst_caps_from_string (g_value_get_string (caps_value));
if (!caps) {
if (error) {
*error =
g_error_new (GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED,
"Invalid caps string: %s", g_value_get_string (caps_value));
}
return FALSE;
}
} else {
if (error) {
*error =
g_error_new (GST_RESOURCE_ERROR, GST_RESOURCE_ERROR_FAILED,
"Invalid type %s for `caps`", G_VALUE_TYPE_NAME (caps_value));
}
return FALSE;
}
}
capsfilter = gst_element_factory_make ("capsfilter", NULL);
if (caps) {
g_object_set (capsfilter, "caps", caps, NULL);
}
src = gst_element_factory_make (srcfactory, NULL);
pad = gst_element_get_static_pad (src, "src");
stream_id = g_strdup_printf ("%s_stream_%d", srcfactory, *n_stream);
stream = gst_stream_new (stream_id, caps, stype,
(*n_stream == 0) ? GST_STREAM_FLAG_SELECT : GST_STREAM_FLAG_UNSELECT);
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_structure_set (props, "__streamobj__", GST_TYPE_STREAM, stream, NULL);
gst_stream_collection_add_stream (collection, stream);
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);
g_free (stream_id);
gst_bin_add_many (GST_BIN (self), src, capsfilter, NULL);
if (!gst_element_link (src, capsfilter)) {
g_error ("Could not link src with capsfilter?!");
}
gst_object_unref (pad);
pad = gst_element_get_static_pad (capsfilter, "src");
pad_name = g_strdup_printf (template->name_template, *n_stream);
templ = gst_static_pad_template_get (template);
ghost = gst_ghost_pad_new_from_template (pad_name, pad, templ);
gst_object_unref (templ);
g_free (pad_name);
gst_object_unref (pad);
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_pad_store_sticky_event (ghost, stream_start);
gst_element_add_pad (GST_ELEMENT (self), ghost);
gst_element_sync_state_with_parent (capsfilter);
gst_element_sync_state_with_parent (src);
*n_stream += 1;
gst_structure_set (props, "__src__", GST_TYPE_OBJECT, src, NULL);
gst_clear_caps (&caps);
return TRUE;
}
static void
gst_test_src_bin_remove_child (GstElement * self, GstElement * child)
{
GstPad *pad = gst_element_get_static_pad (child, "src");
GstPad *ghost =
GST_PAD (gst_proxy_pad_get_internal (GST_PROXY_PAD (gst_pad_get_peer
(pad))));
gst_element_set_locked_state (child, FALSE);
gst_element_set_state (child, GST_STATE_NULL);
gst_bin_remove (GST_BIN (self), child);
gst_element_remove_pad (self, ghost);
}
static GstStream *
gst_test_check_prev_stream_def (GstTestSrcBin * self, GstCaps * prev_streams,
GstStructure * stream_def)
{
gint i;
if (!prev_streams)
return NULL;
for (i = 0; i < gst_caps_get_size (prev_streams); i++) {
GstStructure *prev_stream = gst_caps_get_structure (prev_streams, i);
GstElement *e = NULL;
GstStream *stream = NULL;
gst_structure_get (prev_stream, "__src__", GST_TYPE_OBJECT, &e,
"__streamobj__", GST_TYPE_STREAM, &stream, NULL);
gst_structure_remove_fields (prev_stream, "__src__", "__streamobj__", NULL);
if (gst_structure_is_equal (prev_stream, stream_def)) {
g_assert (stream);
gst_caps_remove_structure (prev_streams, i);
gst_structure_set (stream_def, "__src__", GST_TYPE_OBJECT, e,
"__streamobj__", GST_TYPE_STREAM, stream, NULL);
g_assert (stream);
return stream;
}
gst_structure_set (stream_def, "__src__", GST_TYPE_OBJECT, e,
"__streamobj__", GST_TYPE_STREAM, stream, NULL);
}
return NULL;
}
static gboolean
gst_test_src_bin_create_sources (GstTestSrcBin * self)
{
gint i, n_audio = 0, n_video = 0;
GError *error = NULL;
GstStreamCollection *collection = gst_stream_collection_new (NULL);
GstCaps *streams_def, *prev_streams_def;
GST_OBJECT_LOCK (self);
streams_def = self->next_streams_def;
prev_streams_def = self->streams_def;
self->next_streams_def = NULL;
self->streams_def = NULL;
GST_OBJECT_UNLOCK (self);
GST_INFO_OBJECT (self, "Create sources %" GST_PTR_FORMAT,
self->next_streams_def);
self->group_id = gst_util_group_id_next ();
for (i = 0; i < gst_caps_get_size (streams_def); i++) {
GstStream *stream;
GstStructure *stream_def = gst_caps_get_structure (streams_def, i);
if ((stream =
gst_test_check_prev_stream_def (self, prev_streams_def,
stream_def))) {
GST_INFO_OBJECT (self,
"Reusing already existing stream: %" GST_PTR_FORMAT, stream_def);
gst_stream_collection_add_stream (collection, stream);
if (gst_structure_has_name (stream_def, "video"))
n_video++;
else
n_audio++;
continue;
}
if (gst_structure_has_name (stream_def, "video")) {
if (!gst_test_src_bin_setup_src (self, "videotestsrc",
&video_src_template, GST_STREAM_TYPE_VIDEO, collection, &n_video,
stream_def, &error)) {
goto failed;
}
} else if (gst_structure_has_name (stream_def, "audio")) {
if (!gst_test_src_bin_setup_src (self, "audiotestsrc",
&audio_src_template, GST_STREAM_TYPE_AUDIO, collection, &n_audio,
stream_def, &error)) {
goto failed;
}
} else {
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GST_ERROR_OBJECT (self, "Unknown type %s",
gst_structure_get_name (stream_def));
}
}
if (prev_streams_def) {
for (i = 0; i < gst_caps_get_size (prev_streams_def); i++) {
GstStructure *prev_stream = gst_caps_get_structure (prev_streams_def, i);
GstElement *child;
gst_structure_get (prev_stream, "__src__", GST_TYPE_OBJECT, &child, NULL);
gst_test_src_bin_remove_child (GST_ELEMENT (self), child);
}
gst_clear_caps (&prev_streams_def);
}
if (!n_video && !n_audio) {
GST_ELEMENT_ERROR (self, RESOURCE, NOT_FOUND,
("No audio or video stream defined."), (NULL));
goto failed;
}
GST_OBJECT_LOCK (self);
self->streams_def = streams_def;
GST_OBJECT_UNLOCK (self);
gst_element_post_message (GST_ELEMENT (self),
gst_message_new_stream_collection (GST_OBJECT (self), collection));
gst_object_unref (collection);
gst_element_no_more_pads (GST_ELEMENT (self));
return TRUE;
failed:
gst_element_post_message (GST_ELEMENT (self),
gst_message_new_error (GST_OBJECT (self), error, NULL)
);
return FALSE;
}
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);
GstCaps *streams_def;
for (tmp = location; *tmp != '\0'; tmp++)
if (*tmp == '+')
*tmp = ';';
streams_def = gst_caps_from_string (location);
g_free (location);
if (!streams_def)
goto failed;
GST_OBJECT_LOCK (self);
gst_clear_caps (&self->next_streams_def);
self->next_streams_def = streams_def;
g_free (self->uri);
self->uri = g_strdup (uri);
if (GST_STATE (self) >= GST_STATE_PAUSED) {
if (self->expose_sources_async) {
GST_OBJECT_UNLOCK (self);
gst_element_call_async (GST_ELEMENT (self),
(GstElementCallAsyncFunc) gst_test_src_bin_create_sources,
NULL, NULL);
} else {
GST_OBJECT_UNLOCK (self);
gst_test_src_bin_create_sources (self);
}
} else {
GST_OBJECT_UNLOCK (self);
}
return TRUE;
failed:
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* */
GST_ELEMENT_REGISTER_DEFINE (testsrcbin, "testsrcbin",
GST_RANK_NONE, gst_test_src_bin_get_type ());
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;
}
case PROP_EXPOSE_SOURCES_ASYNC:
{
GST_OBJECT_LOCK (self);
self->expose_sources_async = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (self);
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;
}
case PROP_EXPOSE_SOURCES_ASYNC:
{
GST_OBJECT_LOCK (self);
g_value_set_boolean (value, self->expose_sources_async);
GST_OBJECT_UNLOCK (self);
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;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:{
if (self->expose_sources_async) {
gst_element_call_async (element,
(GstElementCallAsyncFunc) gst_test_src_bin_create_sources,
NULL, NULL);
} else {
gst_test_src_bin_create_sources (self);
}
break;
}
default:
break;
}
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_OBJECT_CLASS (gst_test_src_bin_parent_class)->finalize (object);
g_free (self->uri);
gst_clear_caps (&self->streams_def);
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)));
/**
* GstTestSrcBin:expose-sources-async:
*
* Whether to expose sources at random time to simulate a source that is
* reading a file and exposing the srcpads later.
*
* Since: 1.20
*/
g_object_class_install_property (gobject_class, PROP_EXPOSE_SOURCES_ASYNC,
g_param_spec_boolean ("expose-sources-async", "Expose Sources Async",
" Whether to expose sources at random time to simulate a source that is"
" reading a file and exposing the srcpads later.",
FALSE, (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));
}