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97a4cb6bb8
Original commit message from CVS: * gst/switch/gstswitch.c: (gst_switch_release_pad), (gst_switch_request_new_pad), (gst_switch_poll_sinkpads), (gst_switch_loop), (gst_switch_get_type): whoever that was: DO NOT IMPORT PRIVATE SYMBOLS THAT ARE NOT IN HEADERS. Had to be said.
498 lines
14 KiB
C
498 lines
14 KiB
C
/* GStreamer
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* Copyright (C) 2003 Julien Moutte <julien@moutte.net>
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/* Object header */
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#include "gstswitch.h"
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enum
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{
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ARG_0,
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ARG_NB_SOURCES,
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ARG_ACTIVE_SOURCE
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};
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GST_DEBUG_CATEGORY_STATIC (switch_debug);
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/* ElementFactory information */
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static GstElementDetails gst_switch_details = GST_ELEMENT_DETAILS ("Switch",
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"Generic",
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"N-to-1 input switching",
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"Julien Moutte <julien@moutte.net>");
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static GstStaticPadTemplate gst_switch_sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink%d",
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GST_PAD_SINK,
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GST_PAD_REQUEST,
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GST_STATIC_CAPS_ANY);
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static GstElementClass *parent_class = NULL;
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/* ============================================================= */
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/* */
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/* Private Methods */
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/* */
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/* ============================================================= */
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static void
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gst_switch_release_pad (GstElement * element, GstPad * pad)
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{
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GList *sinkpads = NULL;
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GstSwitch *gstswitch = NULL;
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GstSwitchPad *switchpad = NULL;
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g_return_if_fail (GST_IS_SWITCH (element));
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gstswitch = GST_SWITCH (element);
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GST_LOG_OBJECT (gstswitch, "releasing requested pad %p", pad);
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sinkpads = gstswitch->sinkpads;
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/* Walking through our pad list searching for the pad we want to release */
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while (sinkpads) {
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switchpad = sinkpads->data;
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if (switchpad && switchpad->sinkpad == pad)
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break;
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else
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switchpad = NULL;
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sinkpads = g_list_next (sinkpads);
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}
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/* Releasing the found pad */
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if (switchpad) {
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/* We unref the data of that pad to loose our reference */
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gst_data_unref (switchpad->data);
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/* If data has not been forwarded we have to destroy it */
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if (!switchpad->forwarded && switchpad->data) {
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gst_data_unref (switchpad->data);
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}
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gst_element_remove_pad (element, pad);
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gstswitch->sinkpads = g_list_remove (gstswitch->sinkpads, switchpad);
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gstswitch->nb_sinkpads--;
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if (gstswitch->active_sinkpad >= gstswitch->nb_sinkpads)
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gstswitch->active_sinkpad = 0;
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g_free (switchpad);
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}
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}
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static GstPad *
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gst_switch_request_new_pad (GstElement * element,
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GstPadTemplate * templ, const gchar * unused)
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{
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char *name = NULL;
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GstPad *sinkpad = NULL;
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GstSwitch *gstswitch = NULL;
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GstSwitchPad *switchpad = NULL;
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g_return_val_if_fail (GST_IS_SWITCH (element), NULL);
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gstswitch = GST_SWITCH (element);
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/* We only provide requested sink pads */
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if (templ->direction != GST_PAD_SINK) {
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GST_LOG_OBJECT (gstswitch, "requested a non sink pad");
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return NULL;
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}
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name = g_strdup_printf ("sink%d", gstswitch->nb_sinkpads);
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sinkpad = gst_pad_new_from_template (templ, name);
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if (name)
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g_free (name);
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/* That pad will proxy caps and link */
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gst_pad_set_link_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_pad_proxy_pad_link));
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gst_pad_set_getcaps_function (sinkpad,
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GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
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gst_element_add_pad (GST_ELEMENT (gstswitch), sinkpad);
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switchpad = g_new0 (GstSwitchPad, 1);
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if (!switchpad)
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return NULL;
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switchpad->sinkpad = sinkpad;
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switchpad->data = NULL;
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switchpad->forwarded = FALSE;
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switchpad->eos = FALSE;
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gstswitch->sinkpads = g_list_insert (gstswitch->sinkpads, switchpad,
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gstswitch->nb_sinkpads);
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gstswitch->nb_sinkpads++;
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if (GST_PAD_CAPS (gstswitch->srcpad)) {
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gst_pad_try_set_caps (sinkpad, GST_PAD_CAPS (gstswitch->srcpad));
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}
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return sinkpad;
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}
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static gboolean
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gst_switch_poll_sinkpads (GstSwitch * gstswitch)
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{
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GList *pads;
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g_return_val_if_fail (gstswitch != NULL, FALSE);
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g_return_val_if_fail (GST_IS_SWITCH (gstswitch), FALSE);
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pads = gstswitch->sinkpads;
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while (pads) {
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GstSwitchPad *switchpad = pads->data;
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/* We only pull from usable pads and non EOS pads */
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if (GST_PAD_IS_USABLE (switchpad->sinkpad) && !switchpad->eos) {
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GST_LOG_OBJECT (gstswitch, "polling pad %p", switchpad->sinkpad);
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/* We loose the reference to the data we stored */
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if (switchpad->data) {
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gst_data_unref (switchpad->data);
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}
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/* If that data was not forwarded we unref it another time to destroy it */
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if (!switchpad->forwarded && switchpad->data) {
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gst_data_unref (switchpad->data);
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}
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switchpad->data = NULL;
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switchpad->data = gst_pad_pull (switchpad->sinkpad);
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if (!switchpad->data) {
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GST_LOG_OBJECT (gstswitch,
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"received NULL data from pad %p", switchpad->sinkpad);
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} else {
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gst_data_ref (switchpad->data);
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switchpad->forwarded = FALSE;
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/* If the buffer is an EOS event we tag the pad as being in EOS. That
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means we won't try to pull more data from that pad */
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if (GST_IS_EVENT (switchpad->data) &&
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(GST_EVENT_TYPE (GST_EVENT (switchpad->data)) == GST_EVENT_EOS)) {
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GST_LOG_OBJECT (gstswitch,
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"received EOS event on pad %p", switchpad->sinkpad);
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switchpad->eos = TRUE;
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}
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}
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} else {
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GST_LOG_OBJECT (gstswitch,
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"not pulling from pad %s (eos is %d)",
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gst_pad_get_name (switchpad->sinkpad), switchpad->eos);
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}
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pads = g_list_next (pads);
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}
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return TRUE;
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}
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static void
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gst_switch_loop (GstElement * element)
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{
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GstSwitch *gstswitch = NULL;
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GstSwitchPad *switchpad = NULL;
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g_return_if_fail (element != NULL);
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g_return_if_fail (GST_IS_SWITCH (element));
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gstswitch = GST_SWITCH (element);
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/* We poll all our sinkpads */
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gst_switch_poll_sinkpads (gstswitch);
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/* We get the active sinkpad */
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switchpad = g_list_nth_data (gstswitch->sinkpads, gstswitch->active_sinkpad);
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if (switchpad && switchpad->data) {
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GstData *data = switchpad->data;
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/* Loose our reference to that data */
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gst_data_unref (switchpad->data);
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switchpad->data = NULL;
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GST_LOG_OBJECT (gstswitch,
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"using data from active pad %p", switchpad->sinkpad);
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if (GST_IS_EVENT (data)) {
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GstEvent *event = GST_EVENT (data);
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GST_LOG_OBJECT (gstswitch,
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"handling event from active pad %p", switchpad->sinkpad);
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/* Handling event */
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gst_pad_event_default (switchpad->sinkpad, event);
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} else {
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/* Pushing active sinkpad data to srcpad */
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GST_LOG_OBJECT (gstswitch,
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"pushing data from active pad %p to %p",
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switchpad->sinkpad, gstswitch->srcpad);
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gst_pad_push (gstswitch->srcpad, data);
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}
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/* Mark this data as forwarded so that it won't get unrefed on next poll */
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switchpad->forwarded = TRUE;
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}
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}
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static GstElementStateReturn
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gst_switch_change_state (GstElement * element)
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{
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GstSwitch *gstswitch;
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gstswitch = GST_SWITCH (element);
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switch (GST_STATE_TRANSITION (element)) {
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case GST_STATE_NULL_TO_READY:
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break;
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case GST_STATE_READY_TO_PAUSED:
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break;
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case GST_STATE_PAUSED_TO_PLAYING:
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break;
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case GST_STATE_PLAYING_TO_PAUSED:
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{
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GList *sinkpads = NULL;
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sinkpads = gstswitch->sinkpads;
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while (sinkpads) {
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GstSwitchPad *switchpad = sinkpads->data;
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/* If a data is still stored in our structure we unref it */
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if (switchpad->data) {
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gst_data_unref (switchpad->data);
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switchpad->data = NULL;
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}
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switchpad->forwarded = FALSE;
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switchpad->eos = FALSE;
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sinkpads = g_list_next (sinkpads);
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}
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}
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break;
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case GST_STATE_PAUSED_TO_READY:
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break;
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case GST_STATE_READY_TO_NULL:
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break;
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}
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if (GST_ELEMENT_CLASS (parent_class)->change_state)
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return GST_ELEMENT_CLASS (parent_class)->change_state (element);
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else
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return GST_STATE_SUCCESS;
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}
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/* =========================================== */
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/* */
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/* Properties */
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/* */
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/* =========================================== */
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static void
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gst_switch_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstSwitch *gstswitch = NULL;
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g_return_if_fail (GST_IS_SWITCH (object));
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gstswitch = GST_SWITCH (object);
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switch (prop_id) {
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case ARG_ACTIVE_SOURCE:
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gstswitch->active_sinkpad = g_value_get_int (value);
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break;
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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_switch_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstSwitch *gstswitch = NULL;
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g_return_if_fail (GST_IS_SWITCH (object));
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gstswitch = GST_SWITCH (object);
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switch (prop_id) {
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case ARG_ACTIVE_SOURCE:
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g_value_set_int (value, gstswitch->active_sinkpad);
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break;
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case ARG_NB_SOURCES:
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g_value_set_int (value, gstswitch->nb_sinkpads);
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break;
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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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/* =========================================== */
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/* */
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/* Init & Class init */
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/* */
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/* =========================================== */
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static void
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gst_switch_dispose (GObject * object)
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{
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GstSwitch *gstswitch = NULL;
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GList *sinkpads = NULL;
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gstswitch = GST_SWITCH (object);
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sinkpads = gstswitch->sinkpads;
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while (sinkpads) {
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GstSwitchPad *switchpad = sinkpads->data;
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/* If a data is still stored in our structure we unref it */
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if (switchpad->data) {
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gst_data_unref (switchpad->data);
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switchpad->data = NULL;
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}
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/* Freeing our structure */
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g_free (switchpad);
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sinkpads = g_list_next (sinkpads);
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}
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/* Freeing the list correctly */
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if (gstswitch->sinkpads) {
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g_list_free (gstswitch->sinkpads);
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gstswitch->sinkpads = 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_switch_init (GstSwitch * gstswitch)
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{
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gstswitch->srcpad = gst_pad_new ("src", GST_PAD_SRC);
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gst_element_add_pad (GST_ELEMENT (gstswitch), gstswitch->srcpad);
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gst_pad_set_link_function (gstswitch->srcpad,
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GST_DEBUG_FUNCPTR (gst_pad_proxy_pad_link));
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gst_pad_set_getcaps_function (gstswitch->srcpad,
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GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps));
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gst_element_set_loop_function (GST_ELEMENT (gstswitch), gst_switch_loop);
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gstswitch->sinkpads = NULL;
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gstswitch->active_sinkpad = 0;
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gstswitch->nb_sinkpads = 0;
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}
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static void
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gst_switch_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_switch_details);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_switch_sink_factory));
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}
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static void
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gst_switch_class_init (GstSwitchClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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g_object_class_install_property (gobject_class,
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ARG_NB_SOURCES,
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g_param_spec_int ("nb_sources",
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"number of sources",
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"number of sources", G_MININT, G_MAXINT, 0, G_PARAM_READABLE));
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g_object_class_install_property (gobject_class,
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ARG_ACTIVE_SOURCE,
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g_param_spec_int ("active_source",
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"active source",
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"active source", G_MININT, G_MAXINT, 0, G_PARAM_READWRITE));
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gobject_class->dispose = gst_switch_dispose;
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gobject_class->set_property = gst_switch_set_property;
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gobject_class->get_property = gst_switch_get_property;
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gstelement_class->change_state = gst_switch_change_state;
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gstelement_class->request_new_pad = gst_switch_request_new_pad;
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gstelement_class->release_pad = gst_switch_release_pad;
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}
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/* ============================================================= */
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/* */
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/* Public Methods */
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/* */
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/* ============================================================= */
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GType
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gst_switch_get_type (void)
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{
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static GType switch_type = 0;
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if (!switch_type) {
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static const GTypeInfo switch_info = {
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sizeof (GstSwitchClass),
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gst_switch_base_init,
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NULL,
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(GClassInitFunc) gst_switch_class_init,
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NULL,
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NULL,
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sizeof (GstSwitch),
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0,
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(GInstanceInitFunc) gst_switch_init,
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};
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switch_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstSwitch", &switch_info, 0);
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GST_DEBUG_CATEGORY_INIT (switch_debug, "switch", 0, "the switch element");
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}
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return switch_type;
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "switch", GST_RANK_NONE,
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GST_TYPE_SWITCH);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"switch",
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"N-to-1 input switching",
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plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
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