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