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271 lines
7.5 KiB
C
271 lines
7.5 KiB
C
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/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2003> David Schleef <ds@schleef.org>
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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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* This file was (probably) generated from gstnavseek.c,
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* gstnavseek.c,v 1.7 2003/11/08 02:48:59 dschleef Exp
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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 <gstnavseek.h>
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#include <string.h>
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#include <math.h>
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/* GstNavSeek signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_SEEKOFFSET
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/* FILL ME */
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};
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GstStaticPadTemplate navseek_src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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GstStaticPadTemplate navseek_sink_template = 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 void gst_navseek_base_init (gpointer g_class);
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static void gst_navseek_class_init (gpointer g_class, gpointer class_data);
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static void gst_navseek_init (GTypeInstance * instance, gpointer g_class);
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static gboolean gst_navseek_handle_src_event (GstPad * pad, GstEvent * event);
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static void gst_navseek_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_navseek_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_navseek_chain (GstPad * pad, GstData * _data);
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static GType
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gst_navseek_get_type (void)
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{
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static GType navseek_type = 0;
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if (!navseek_type) {
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static const GTypeInfo navseek_info = {
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sizeof (GstNavSeekClass),
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gst_navseek_base_init,
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NULL,
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gst_navseek_class_init,
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NULL,
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NULL,
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sizeof (GstNavSeek),
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0,
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gst_navseek_init,
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};
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navseek_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstNavSeek", &navseek_info, 0);
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}
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return navseek_type;
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}
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static void
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gst_navseek_base_init (gpointer g_class)
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{
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static GstElementDetails navseek_details =
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GST_ELEMENT_DETAILS ("Seek based on left-right arrows",
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"Filter/Video",
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"Seek based on navigation keys left-right",
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"Jan Schmidt <thaytan@mad.scientist.com>");
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&navseek_sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&navseek_src_template));
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gst_element_class_set_details (element_class, &navseek_details);
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}
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static void
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gst_navseek_class_init (gpointer g_class, gpointer class_data)
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{
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GObjectClass *gobject_class;
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gobject_class = G_OBJECT_CLASS (g_class);
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g_object_class_install_property (G_OBJECT_CLASS (g_class),
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ARG_SEEKOFFSET, g_param_spec_double ("seek-offset", "Seek Offset",
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"Time in seconds to seek by", 0.0, G_MAXDOUBLE, 5.0,
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G_PARAM_READWRITE));
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gobject_class->set_property = gst_navseek_set_property;
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gobject_class->get_property = gst_navseek_get_property;
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}
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static void
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gst_navseek_init (GTypeInstance * instance, gpointer g_class)
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{
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GstNavSeek *navseek = GST_NAVSEEK (instance);
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navseek->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&navseek_sink_template), "sink");
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gst_element_add_pad (GST_ELEMENT (navseek), navseek->sinkpad);
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gst_pad_set_chain_function (navseek->sinkpad, gst_navseek_chain);
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gst_pad_set_link_function (navseek->sinkpad, gst_pad_proxy_pad_link);
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gst_pad_set_getcaps_function (navseek->sinkpad, gst_pad_proxy_getcaps);
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navseek->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&navseek_src_template), "src");
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gst_element_add_pad (GST_ELEMENT (navseek), navseek->srcpad);
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gst_pad_set_link_function (navseek->srcpad, gst_pad_proxy_pad_link);
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gst_pad_set_getcaps_function (navseek->srcpad, gst_pad_proxy_getcaps);
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gst_pad_set_event_function (navseek->srcpad, gst_navseek_handle_src_event);
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navseek->seek_offset = 5.0;
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}
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static void
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gst_navseek_seek (GstNavSeek * navseek, gint64 offset)
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{
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/* Query for the current time then attempt to set to time + offset */
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gint64 peer_value;
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GstFormat peer_format = GST_FORMAT_TIME;
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if (gst_pad_query (gst_pad_get_peer (navseek->sinkpad),
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GST_QUERY_POSITION, &peer_format, &peer_value)) {
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if (peer_format != GST_FORMAT_TIME)
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return;
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peer_value += offset;
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if (peer_value < 0)
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peer_value = 0;
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gst_element_seek (GST_ELEMENT (navseek),
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GST_SEEK_METHOD_SET | GST_FORMAT_TIME | GST_SEEK_FLAG_ACCURATE |
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GST_SEEK_FLAG_FLUSH, peer_value);
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}
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}
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static gboolean
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gst_navseek_handle_src_event (GstPad * pad, GstEvent * event)
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{
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GstNavSeek *navseek;
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navseek = GST_NAVSEEK (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_NAVIGATION:
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/* Check for a keyup and convert left/right to a seek event */
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{
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GstStructure *structure;
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const gchar *event_type;
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structure = event->event_data.structure.structure;
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event_type = gst_structure_get_string (structure, "event");
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g_return_val_if_fail (event != NULL, FALSE);
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if (strcmp (event_type, "key-press") == 0) {
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const char *key = gst_structure_get_string (structure, "key");
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g_assert (key != NULL);
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if (strcmp (key, "Left") == 0) {
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/* Seek backward by 5 secs */
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gst_navseek_seek (navseek, -1.0 * navseek->seek_offset * GST_SECOND);
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} else if (strcmp (key, "Right") == 0) {
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/* Seek forward */
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gst_navseek_seek (navseek, navseek->seek_offset * GST_SECOND);
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}
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} else {
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break;
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}
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gst_event_unref (event);
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event = NULL;
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}
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break;
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default:
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break;
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}
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if (event) {
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return gst_pad_send_event (gst_pad_get_peer (navseek->sinkpad), event);
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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_navseek_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstNavSeek *src;
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g_return_if_fail (GST_IS_NAVSEEK (object));
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src = GST_NAVSEEK (object);
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switch (prop_id) {
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case ARG_SEEKOFFSET:
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src->seek_offset = g_value_get_double (value);
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break;
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default:
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break;
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}
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}
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static void
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gst_navseek_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstNavSeek *src;
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g_return_if_fail (GST_IS_NAVSEEK (object));
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src = GST_NAVSEEK (object);
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switch (prop_id) {
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case ARG_SEEKOFFSET:
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g_value_set_double (value, src->seek_offset);
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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_navseek_chain (GstPad * pad, GstData * _data)
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{
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GstNavSeek *navseek;
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navseek = GST_NAVSEEK (gst_pad_get_parent (pad));
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gst_pad_push (navseek->srcpad, _data);
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}
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gboolean
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gst_navseek_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "navseek", GST_RANK_NONE,
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GST_TYPE_NAVSEEK);
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}
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