diff options
Diffstat (limited to 'gst/debug/gstnavseek.c')
| -rw-r--r-- | gst/debug/gstnavseek.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/gst/debug/gstnavseek.c b/gst/debug/gstnavseek.c new file mode 100644 index 00000000..476fa83a --- /dev/null +++ b/gst/debug/gstnavseek.c @@ -0,0 +1,270 @@ +/* GStreamer + * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> + * Copyright (C) <2003> David Schleef <ds@schleef.org> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +/* + * This file was (probably) generated from gstnavseek.c, + * gstnavseek.c,v 1.7 2003/11/08 02:48:59 dschleef Exp + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gstnavseek.h> +#include <string.h> +#include <math.h> + +/* GstNavSeek signals and args */ +enum +{ + /* FILL ME */ + LAST_SIGNAL +}; + +enum +{ + ARG_0, + ARG_SEEKOFFSET + /* FILL ME */ +}; + +GstStaticPadTemplate navseek_src_template = GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS_ANY); + +GstStaticPadTemplate navseek_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS_ANY); + +static void gst_navseek_base_init (gpointer g_class); +static void gst_navseek_class_init (gpointer g_class, gpointer class_data); +static void gst_navseek_init (GTypeInstance * instance, gpointer g_class); + +static gboolean gst_navseek_handle_src_event (GstPad * pad, GstEvent * event); +static void gst_navseek_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_navseek_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); +static void gst_navseek_chain (GstPad * pad, GstData * _data); + +static GType +gst_navseek_get_type (void) +{ + static GType navseek_type = 0; + + if (!navseek_type) { + static const GTypeInfo navseek_info = { + sizeof (GstNavSeekClass), + gst_navseek_base_init, + NULL, + gst_navseek_class_init, + NULL, + NULL, + sizeof (GstNavSeek), + 0, + gst_navseek_init, + }; + + navseek_type = g_type_register_static (GST_TYPE_ELEMENT, + "GstNavSeek", &navseek_info, 0); + } + return navseek_type; +} + +static void +gst_navseek_base_init (gpointer g_class) +{ + static GstElementDetails navseek_details = + GST_ELEMENT_DETAILS ("Seek based on left-right arrows", + "Filter/Video", + "Seek based on navigation keys left-right", + "Jan Schmidt <thaytan@mad.scientist.com>"); + GstElementClass *element_class = GST_ELEMENT_CLASS (g_class); + + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&navseek_sink_template)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&navseek_src_template)); + + gst_element_class_set_details (element_class, &navseek_details); +} + +static void +gst_navseek_class_init (gpointer g_class, gpointer class_data) +{ + GObjectClass *gobject_class; + + gobject_class = G_OBJECT_CLASS (g_class); + + g_object_class_install_property (G_OBJECT_CLASS (g_class), + ARG_SEEKOFFSET, g_param_spec_double ("seek-offset", "Seek Offset", + "Time in seconds to seek by", 0.0, G_MAXDOUBLE, 5.0, + G_PARAM_READWRITE)); + + gobject_class->set_property = gst_navseek_set_property; + gobject_class->get_property = gst_navseek_get_property; +} + +static void +gst_navseek_init (GTypeInstance * instance, gpointer g_class) +{ + GstNavSeek *navseek = GST_NAVSEEK (instance); + + navseek->sinkpad = + gst_pad_new_from_template (gst_static_pad_template_get + (&navseek_sink_template), "sink"); + gst_element_add_pad (GST_ELEMENT (navseek), navseek->sinkpad); + gst_pad_set_chain_function (navseek->sinkpad, gst_navseek_chain); + gst_pad_set_link_function (navseek->sinkpad, gst_pad_proxy_pad_link); + gst_pad_set_getcaps_function (navseek->sinkpad, gst_pad_proxy_getcaps); + + navseek->srcpad = + gst_pad_new_from_template (gst_static_pad_template_get + (&navseek_src_template), "src"); + gst_element_add_pad (GST_ELEMENT (navseek), navseek->srcpad); + gst_pad_set_link_function (navseek->srcpad, gst_pad_proxy_pad_link); + gst_pad_set_getcaps_function (navseek->srcpad, gst_pad_proxy_getcaps); + gst_pad_set_event_function (navseek->srcpad, gst_navseek_handle_src_event); + + navseek->seek_offset = 5.0; +} + +static void +gst_navseek_seek (GstNavSeek * navseek, gint64 offset) +{ + /* Query for the current time then attempt to set to time + offset */ + gint64 peer_value; + GstFormat peer_format = GST_FORMAT_TIME; + + if (gst_pad_query (gst_pad_get_peer (navseek->sinkpad), + GST_QUERY_POSITION, &peer_format, &peer_value)) { + if (peer_format != GST_FORMAT_TIME) + return; + + peer_value += offset; + if (peer_value < 0) + peer_value = 0; + + gst_element_seek (GST_ELEMENT (navseek), + GST_SEEK_METHOD_SET | GST_FORMAT_TIME | GST_SEEK_FLAG_ACCURATE | + GST_SEEK_FLAG_FLUSH, peer_value); + } +} + +static gboolean +gst_navseek_handle_src_event (GstPad * pad, GstEvent * event) +{ + GstNavSeek *navseek; + + navseek = GST_NAVSEEK (gst_pad_get_parent (pad)); + + switch (GST_EVENT_TYPE (event)) { + case GST_EVENT_NAVIGATION: + /* Check for a keyup and convert left/right to a seek event */ + { + GstStructure *structure; + const gchar *event_type; + + structure = event->event_data.structure.structure; + event_type = gst_structure_get_string (structure, "event"); + + g_return_val_if_fail (event != NULL, FALSE); + + if (strcmp (event_type, "key-press") == 0) { + const char *key = gst_structure_get_string (structure, "key"); + + g_assert (key != NULL); + if (strcmp (key, "Left") == 0) { + /* Seek backward by 5 secs */ + gst_navseek_seek (navseek, -1.0 * navseek->seek_offset * GST_SECOND); + } else if (strcmp (key, "Right") == 0) { + /* Seek forward */ + gst_navseek_seek (navseek, navseek->seek_offset * GST_SECOND); + } + } else { + break; + } + gst_event_unref (event); + event = NULL; + } + break; + default: + break; + } + if (event) { + return gst_pad_send_event (gst_pad_get_peer (navseek->sinkpad), event); + } + return TRUE; +} + +static void +gst_navseek_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstNavSeek *src; + + g_return_if_fail (GST_IS_NAVSEEK (object)); + src = GST_NAVSEEK (object); + + switch (prop_id) { + case ARG_SEEKOFFSET: + src->seek_offset = g_value_get_double (value); + break; + default: + break; + } +} + +static void +gst_navseek_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec) +{ + GstNavSeek *src; + + g_return_if_fail (GST_IS_NAVSEEK (object)); + src = GST_NAVSEEK (object); + + switch (prop_id) { + case ARG_SEEKOFFSET: + g_value_set_double (value, src->seek_offset); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +gst_navseek_chain (GstPad * pad, GstData * _data) +{ + GstNavSeek *navseek; + + navseek = GST_NAVSEEK (gst_pad_get_parent (pad)); + gst_pad_push (navseek->srcpad, _data); +} + +gboolean +gst_navseek_plugin_init (GstPlugin * plugin) +{ + return gst_element_register (plugin, "navseek", GST_RANK_NONE, + GST_TYPE_NAVSEEK); +} |