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Original commit message from CVS: * gst/selector/gstoutputselector.c: Choose right pad for sending events. Fixes #555244
433 lines
13 KiB
C
433 lines
13 KiB
C
/* GStreamer
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* Copyright (C) 2008 Nokia Corporation. (contact <stefan.kost@nokia.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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-output-selector
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* @see_also: #GstTee, #GstInputSelector
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*
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* Direct input stream to one out of N output pads.
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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 "gstoutputselector.h"
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GST_DEBUG_CATEGORY_STATIC (output_selector_debug);
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#define GST_CAT_DEFAULT output_selector_debug
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static const GstElementDetails gst_output_selector_details =
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GST_ELEMENT_DETAILS ("Output selector",
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"Generic",
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"1-to-N output stream selectoring",
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"Stefan Kost <stefan.kost@nokia.com>");
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static GstStaticPadTemplate gst_output_selector_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static GstStaticPadTemplate gst_output_selector_src_factory =
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GST_STATIC_PAD_TEMPLATE ("src%d",
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GST_PAD_SRC,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS_ANY);
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enum
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{
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PROP_0,
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PROP_ACTIVE_PAD,
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PROP_RESEND_LATEST,
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PROP_LAST
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};
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GST_BOILERPLATE (GstOutputSelector, gst_output_selector, GstElement,
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GST_TYPE_ELEMENT);
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static void gst_output_selector_dispose (GObject * object);
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static void gst_output_selector_set_property (GObject * object,
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guint prop_id, const GValue * value, GParamSpec * pspec);
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static void gst_output_selector_get_property (GObject * object,
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guint prop_id, GValue * value, GParamSpec * pspec);
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static GstPad *gst_output_selector_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * unused);
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static void gst_output_selector_release_pad (GstElement * element,
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GstPad * pad);
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static GstFlowReturn gst_output_selector_chain (GstPad * pad, GstBuffer * buf);
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static GstStateChangeReturn gst_output_selector_change_state (GstElement *
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element, GstStateChange transition);
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static gboolean gst_output_selector_handle_sink_event (GstPad * pad,
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GstEvent * event);
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static void
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gst_output_selector_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_set_details (element_class, &gst_output_selector_details);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_output_selector_sink_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_output_selector_src_factory));
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}
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static void
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gst_output_selector_class_init (GstOutputSelectorClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->dispose = gst_output_selector_dispose;
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gobject_class->set_property =
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GST_DEBUG_FUNCPTR (gst_output_selector_set_property);
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gobject_class->get_property =
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GST_DEBUG_FUNCPTR (gst_output_selector_get_property);
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g_object_class_install_property (gobject_class, PROP_ACTIVE_PAD,
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g_param_spec_object ("active-pad", "Active pad",
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"Currently active src pad", GST_TYPE_PAD, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_RESEND_LATEST,
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g_param_spec_boolean ("resend-latest", "Resend latest buffer",
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"Resend latest buffer after a switch to a new pad", FALSE,
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G_PARAM_READWRITE));
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gstelement_class->request_new_pad =
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GST_DEBUG_FUNCPTR (gst_output_selector_request_new_pad);
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gstelement_class->release_pad =
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GST_DEBUG_FUNCPTR (gst_output_selector_release_pad);
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gstelement_class->change_state = gst_output_selector_change_state;
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GST_DEBUG_CATEGORY_INIT (output_selector_debug,
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"output-selector", 0, "An output stream selector element");
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}
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static void
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gst_output_selector_init (GstOutputSelector * sel,
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GstOutputSelectorClass * g_class)
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{
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sel->sinkpad =
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gst_pad_new_from_static_template (&gst_output_selector_sink_factory,
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"sink");
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gst_pad_set_chain_function (sel->sinkpad,
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GST_DEBUG_FUNCPTR (gst_output_selector_chain));
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gst_pad_set_event_function (sel->sinkpad,
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GST_DEBUG_FUNCPTR (gst_output_selector_handle_sink_event));
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gst_element_add_pad (GST_ELEMENT (sel), sel->sinkpad);
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/*
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gst_pad_set_bufferalloc_function (sel->sinkpad,
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GST_DEBUG_FUNCPTR (gst_output_selector_bufferalloc));
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gst_pad_set_setcaps_function (sel->sinkpad,
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GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps));
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gst_pad_set_getcaps_function (sel->sinkpad,
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GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
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*/
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/* srcpad management */
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sel->active_srcpad = NULL;
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sel->nb_srcpads = 0;
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gst_segment_init (&sel->segment, GST_FORMAT_UNDEFINED);
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sel->pending_srcpad = NULL;
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sel->resend_latest = FALSE;
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sel->latest_buffer = NULL;
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}
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static void
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gst_output_selector_dispose (GObject * object)
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{
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GstOutputSelector *osel = GST_OUTPUT_SELECTOR (object);
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if (osel->pending_srcpad != NULL) {
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gst_object_unref (osel->pending_srcpad);
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osel->pending_srcpad = NULL;
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}
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if (osel->latest_buffer != NULL) {
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gst_buffer_unref (osel->latest_buffer);
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osel->latest_buffer = NULL;
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}
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gst_output_selector_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstOutputSelector *sel = GST_OUTPUT_SELECTOR (object);
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switch (prop_id) {
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case PROP_ACTIVE_PAD:
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{
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GstPad *next_pad;
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next_pad = g_value_get_object (value);
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GST_LOG_OBJECT (sel, "Activating pad %s:%s",
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GST_DEBUG_PAD_NAME (next_pad));
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GST_OBJECT_LOCK (object);
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if (next_pad != sel->active_srcpad) {
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/* switch to new srcpad in next chain run */
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if (sel->pending_srcpad != NULL) {
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GST_INFO ("replacing pending switch");
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gst_object_unref (sel->pending_srcpad);
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}
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if (next_pad)
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gst_object_ref (next_pad);
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sel->pending_srcpad = next_pad;
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} else {
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GST_INFO ("pad already active");
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if (sel->pending_srcpad != NULL) {
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gst_object_unref (sel->pending_srcpad);
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sel->pending_srcpad = NULL;
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}
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}
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GST_OBJECT_UNLOCK (object);
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break;
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}
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case PROP_RESEND_LATEST:{
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sel->resend_latest = g_value_get_boolean (value);
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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_output_selector_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstOutputSelector *sel = GST_OUTPUT_SELECTOR (object);
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switch (prop_id) {
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case PROP_ACTIVE_PAD:
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GST_OBJECT_LOCK (object);
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g_value_set_object (value, sel->active_srcpad);
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GST_OBJECT_UNLOCK (object);
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break;
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case PROP_RESEND_LATEST:{
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GST_OBJECT_LOCK (object);
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g_value_set_boolean (value, sel->resend_latest);
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GST_OBJECT_UNLOCK (object);
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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 GstPad *
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gst_output_selector_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * name)
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{
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gchar *padname;
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GstPad *srcpad;
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GstOutputSelector *osel;
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osel = GST_OUTPUT_SELECTOR (element);
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GST_DEBUG_OBJECT (osel, "requesting pad");
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GST_OBJECT_LOCK (osel);
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padname = g_strdup_printf ("src%d", osel->nb_srcpads++);
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srcpad = gst_pad_new_from_template (templ, padname);
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GST_OBJECT_UNLOCK (osel);
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gst_pad_set_active (srcpad, TRUE);
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gst_element_add_pad (GST_ELEMENT (osel), srcpad);
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/* Set the first requested src pad as active by default */
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if (osel->active_srcpad == NULL) {
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osel->active_srcpad = srcpad;
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}
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g_free (padname);
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return srcpad;
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}
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static void
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gst_output_selector_release_pad (GstElement * element, GstPad * pad)
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{
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GstOutputSelector *osel;
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osel = GST_OUTPUT_SELECTOR (element);
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GST_DEBUG_OBJECT (osel, "releasing pad");
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gst_pad_set_active (pad, FALSE);
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gst_element_remove_pad (GST_ELEMENT_CAST (osel), pad);
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}
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static gboolean
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gst_output_selector_switch (GstOutputSelector * osel)
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{
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gboolean res = TRUE;
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GstEvent *ev = NULL;
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GstSegment *seg = NULL;
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gint64 start = 0, position = 0;
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GST_INFO ("switching to pad %" GST_PTR_FORMAT, osel->pending_srcpad);
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if (gst_pad_is_linked (osel->pending_srcpad)) {
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/* Send NEWSEGMENT to the pad we are going to switch to */
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seg = &osel->segment;
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/* If resending then mark newsegment start and position accordingly */
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if (osel->resend_latest && osel->latest_buffer &&
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GST_BUFFER_TIMESTAMP_IS_VALID (osel->latest_buffer)) {
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start = position = GST_BUFFER_TIMESTAMP (osel->latest_buffer);
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} else {
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start = position = seg->last_stop;
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}
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ev = gst_event_new_new_segment (TRUE, seg->rate,
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seg->format, start, seg->stop, position);
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if (!gst_pad_push_event (osel->pending_srcpad, ev)) {
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GST_WARNING_OBJECT (osel,
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"newsegment handling failed in %" GST_PTR_FORMAT,
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osel->pending_srcpad);
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}
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/* Resend latest buffer to newly switched pad */
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if (osel->resend_latest && osel->latest_buffer) {
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GST_INFO ("resending latest buffer");
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gst_pad_push (osel->pending_srcpad, osel->latest_buffer);
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osel->latest_buffer = NULL;
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}
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/* Switch */
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osel->active_srcpad = osel->pending_srcpad;
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} else {
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GST_WARNING_OBJECT (osel, "switch failed, pad not linked");
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res = FALSE;
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}
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gst_object_unref (osel->pending_srcpad);
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osel->pending_srcpad = NULL;
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return res;
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}
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static GstFlowReturn
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gst_output_selector_chain (GstPad * pad, GstBuffer * buf)
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{
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GstFlowReturn res;
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GstOutputSelector *osel;
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GstClockTime last_stop, duration;
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osel = GST_OUTPUT_SELECTOR (gst_pad_get_parent (pad));
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if (osel->pending_srcpad) {
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/* Do the switch */
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gst_output_selector_switch (osel);
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}
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/* Keep reference to latest buffer to resend it after switch */
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if (osel->latest_buffer)
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gst_buffer_unref (osel->latest_buffer);
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osel->latest_buffer = gst_buffer_ref (buf);
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/* Keep track of last stop and use it in NEWSEGMENT start after
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switching to a new src pad */
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last_stop = GST_BUFFER_TIMESTAMP (buf);
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if (GST_CLOCK_TIME_IS_VALID (last_stop)) {
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duration = GST_BUFFER_DURATION (buf);
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if (GST_CLOCK_TIME_IS_VALID (duration)) {
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last_stop += duration;
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}
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GST_LOG_OBJECT (osel, "setting last stop %" GST_TIME_FORMAT,
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GST_TIME_ARGS (last_stop));
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gst_segment_set_last_stop (&osel->segment, osel->segment.format, last_stop);
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}
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GST_LOG_OBJECT (osel, "pushing buffer to %" GST_PTR_FORMAT,
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osel->active_srcpad);
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res = gst_pad_push (osel->active_srcpad, buf);
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gst_object_unref (osel);
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return res;
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}
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static GstStateChangeReturn
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gst_output_selector_change_state (GstElement * element,
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GstStateChange transition)
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{
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return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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}
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static gboolean
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gst_output_selector_handle_sink_event (GstPad * pad, GstEvent * event)
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{
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gboolean res = TRUE;
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GstOutputSelector *sel;
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GstPad *output_pad = NULL;
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sel = GST_OUTPUT_SELECTOR (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_NEWSEGMENT:
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{
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gboolean update;
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GstFormat format;
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gdouble rate, arate;
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gint64 start, stop, time;
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gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
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&start, &stop, &time);
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GST_DEBUG_OBJECT (sel,
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"configured NEWSEGMENT update %d, rate %lf, applied rate %lf, "
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"format %d, " "%" G_GINT64_FORMAT " -- %" G_GINT64_FORMAT ", time %"
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G_GINT64_FORMAT, update, rate, arate, format, start, stop, time);
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gst_segment_set_newsegment_full (&sel->segment, update,
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rate, arate, format, start, stop, time);
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/* Send newsegment to all src pads */
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gst_pad_event_default (pad, event);
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break;
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}
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case GST_EVENT_EOS:
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/* Send eos to all src pads */
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gst_pad_event_default (pad, event);
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break;
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default:
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/* Send other events to pending or active src pad */
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output_pad =
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sel->pending_srcpad ? sel->pending_srcpad : sel->active_srcpad;
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res = gst_pad_push_event (output_pad, event);
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break;
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}
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gst_object_unref (sel);
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return res;
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}
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