2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2003> David Schleef <ds@schleef.org>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
22 * This file was (probably) generated from gstnavseek.c,
23 * gstnavseek.c,v 1.7 2003/11/08 02:48:59 dschleef Exp
30 #include "gstnavseek.h"
40 GstStaticPadTemplate navseek_src_template = GST_STATIC_PAD_TEMPLATE ("src",
45 GstStaticPadTemplate navseek_sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
50 static gboolean gst_navseek_sink_event (GstBaseTransform * trans,
52 static GstFlowReturn gst_navseek_transform_ip (GstBaseTransform * basetrans,
54 static gboolean gst_navseek_src_event (GstBaseTransform * trans,
56 static gboolean gst_navseek_stop (GstBaseTransform * trans);
57 static gboolean gst_navseek_start (GstBaseTransform * trans);
59 static void gst_navseek_set_property (GObject * object, guint prop_id,
60 const GValue * value, GParamSpec * pspec);
61 static void gst_navseek_get_property (GObject * object, guint prop_id,
62 GValue * value, GParamSpec * pspec);
64 GType gst_navseek_get_type (void);
65 #define gst_navseek_parent_class parent_class
66 G_DEFINE_TYPE (GstNavSeek, gst_navseek, GST_TYPE_BASE_TRANSFORM);
69 gst_navseek_class_init (GstNavSeekClass * klass)
71 GstBaseTransformClass *gstbasetrans_class;
72 GstElementClass *element_class;
73 GObjectClass *gobject_class;
75 gobject_class = G_OBJECT_CLASS (klass);
76 element_class = GST_ELEMENT_CLASS (klass);
77 gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);
79 gobject_class->set_property = gst_navseek_set_property;
80 gobject_class->get_property = gst_navseek_get_property;
82 g_object_class_install_property (gobject_class,
83 PROP_SEEKOFFSET, g_param_spec_double ("seek-offset", "Seek Offset",
84 "Time in seconds to seek by", 0.0, G_MAXDOUBLE, 5.0,
85 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
87 gst_element_class_add_static_pad_template (element_class,
88 &navseek_sink_template);
89 gst_element_class_add_static_pad_template (element_class,
90 &navseek_src_template);
92 gst_element_class_set_static_metadata (element_class,
93 "Seek based on left-right arrows", "Filter/Video",
94 "Seek based on navigation keys left-right",
95 "Jan Schmidt <thaytan@mad.scientist.com>");
97 gstbasetrans_class->src_event = GST_DEBUG_FUNCPTR (gst_navseek_src_event);
98 gstbasetrans_class->sink_event = GST_DEBUG_FUNCPTR (gst_navseek_sink_event);
99 gstbasetrans_class->transform_ip =
100 GST_DEBUG_FUNCPTR (gst_navseek_transform_ip);
101 gstbasetrans_class->start = GST_DEBUG_FUNCPTR (gst_navseek_start);
102 gstbasetrans_class->stop = GST_DEBUG_FUNCPTR (gst_navseek_stop);
106 gst_navseek_init (GstNavSeek * navseek)
108 gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (navseek), TRUE);
110 navseek->seek_offset = 5.0;
111 navseek->loop = FALSE;
112 navseek->grab_seg_start = FALSE;
113 navseek->grab_seg_end = FALSE;
114 navseek->segment_start = GST_CLOCK_TIME_NONE;
115 navseek->segment_end = GST_CLOCK_TIME_NONE;
119 gst_navseek_seek (GstNavSeek * navseek, gint64 offset)
125 /* Query for the current time then attempt to set to time + offset */
126 peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
127 ret = gst_pad_query_position (peer_pad, GST_FORMAT_TIME, &peer_value);
132 peer_value += offset;
136 event = gst_event_new_seek (1.0, GST_FORMAT_TIME,
137 GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH,
138 GST_SEEK_TYPE_SET, peer_value, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
140 gst_pad_send_event (peer_pad, event);
143 gst_object_unref (peer_pad);
147 gst_navseek_change_playback_rate (GstNavSeek * navseek, gdouble rate)
151 gint64 current_position;
153 peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
154 ret = gst_pad_query_position (peer_pad, GST_FORMAT_TIME, ¤t_position);
162 start = current_position;
165 /* negative rate: we play from stop to start */
167 stop = current_position;
170 event = gst_event_new_seek (rate, GST_FORMAT_TIME,
171 GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_SKIP,
172 GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_SET, stop);
174 gst_pad_send_event (peer_pad, event);
176 gst_object_unref (peer_pad);
180 gst_navseek_segseek (GstNavSeek * navseek)
185 if ((navseek->segment_start == GST_CLOCK_TIME_NONE) ||
186 (navseek->segment_end == GST_CLOCK_TIME_NONE) ||
187 (!GST_PAD_IS_LINKED (GST_BASE_TRANSFORM (navseek)->sinkpad))) {
193 gst_event_new_seek (1.0, GST_FORMAT_TIME,
194 GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_SEGMENT,
195 GST_SEEK_TYPE_SET, navseek->segment_start, GST_SEEK_TYPE_SET,
196 navseek->segment_end);
199 gst_event_new_seek (1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_ACCURATE,
200 GST_SEEK_TYPE_SET, navseek->segment_start, GST_SEEK_TYPE_SET,
201 navseek->segment_end);
204 peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
205 gst_pad_send_event (peer_pad, event);
206 gst_object_unref (peer_pad);
210 gst_navseek_toggle_play_pause (GstNavSeek * navseek)
212 GstStateChangeReturn sret;
213 GstState current, pending, state;
215 sret = gst_element_get_state (GST_ELEMENT (navseek), ¤t, &pending, 0);
216 if (sret == GST_STATE_CHANGE_FAILURE)
219 state = (pending != GST_STATE_VOID_PENDING) ? pending : current;
221 gst_element_post_message (GST_ELEMENT (navseek),
222 gst_message_new_request_state (GST_OBJECT (navseek),
223 (state == GST_STATE_PLAYING) ? GST_STATE_PAUSED : GST_STATE_PLAYING));
227 gst_navseek_src_event (GstBaseTransform * trans, GstEvent * event)
232 navseek = GST_NAVSEEK (trans);
234 switch (GST_EVENT_TYPE (event)) {
235 case GST_EVENT_NAVIGATION:
237 /* Check for a keyup and convert left/right to a seek event */
238 const GstStructure *structure;
239 const gchar *event_type;
241 structure = gst_event_get_structure (event);
242 g_return_val_if_fail (structure != NULL, FALSE);
244 event_type = gst_structure_get_string (structure, "event");
245 g_return_val_if_fail (event_type != NULL, FALSE);
247 if (strcmp (event_type, "key-press") == 0) {
250 key = gst_structure_get_string (structure, "key");
251 g_return_val_if_fail (key != NULL, FALSE);
253 if (strcmp (key, "Left") == 0) {
254 /* Seek backward by 5 secs */
255 gst_navseek_seek (navseek, -1.0 * navseek->seek_offset * GST_SECOND);
256 } else if (strcmp (key, "Right") == 0) {
258 gst_navseek_seek (navseek, navseek->seek_offset * GST_SECOND);
259 } else if (strcmp (key, "s") == 0) {
260 /* Grab the next frame as the start frame of a segment */
261 navseek->grab_seg_start = TRUE;
262 } else if (strcmp (key, "e") == 0) {
263 /* Grab the next frame as the end frame of a segment */
264 navseek->grab_seg_end = TRUE;
265 } else if (strcmp (key, "l") == 0) {
266 /* Toggle the loop flag. If we have both start and end segment times send a seek */
267 navseek->loop = !navseek->loop;
268 gst_navseek_segseek (navseek);
269 } else if (strcmp (key, "f") == 0) {
271 gst_navseek_change_playback_rate (navseek, 2.0);
272 } else if (strcmp (key, "r") == 0) {
274 gst_navseek_change_playback_rate (navseek, -2.0);
275 } else if (strcmp (key, "n") == 0) {
277 gst_navseek_change_playback_rate (navseek, 1.0);
278 } else if (strcmp (key, "space") == 0) {
279 gst_navseek_toggle_play_pause (navseek);
284 gst_event_unref (event);
293 ret = GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans, event);
299 gst_navseek_set_property (GObject * object, guint prop_id,
300 const GValue * value, GParamSpec * pspec)
302 GstNavSeek *navseek = GST_NAVSEEK (object);
305 case PROP_SEEKOFFSET:
306 GST_OBJECT_LOCK (navseek);
307 navseek->seek_offset = g_value_get_double (value);
308 GST_OBJECT_UNLOCK (navseek);
311 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
317 gst_navseek_get_property (GObject * object, guint prop_id,
318 GValue * value, GParamSpec * pspec)
320 GstNavSeek *navseek = GST_NAVSEEK (object);
323 case PROP_SEEKOFFSET:
324 GST_OBJECT_LOCK (navseek);
325 g_value_set_double (value, navseek->seek_offset);
326 GST_OBJECT_UNLOCK (navseek);
329 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
335 gst_navseek_sink_event (GstBaseTransform * trans, GstEvent * event)
337 GstNavSeek *navseek = GST_NAVSEEK (trans);
339 switch (GST_EVENT_TYPE (event)) {
341 GST_OBJECT_LOCK (navseek);
343 gst_navseek_segseek (navseek);
344 GST_OBJECT_UNLOCK (navseek);
349 return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
353 gst_navseek_transform_ip (GstBaseTransform * basetrans, GstBuffer * buf)
355 GstNavSeek *navseek = GST_NAVSEEK (basetrans);
357 GST_OBJECT_LOCK (navseek);
359 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
360 if (navseek->grab_seg_start) {
361 navseek->segment_start = GST_BUFFER_TIMESTAMP (buf);
362 navseek->segment_end = GST_CLOCK_TIME_NONE;
363 navseek->grab_seg_start = FALSE;
366 if (navseek->grab_seg_end) {
367 navseek->segment_end = GST_BUFFER_TIMESTAMP (buf);
368 navseek->grab_seg_end = FALSE;
369 gst_navseek_segseek (navseek);
373 GST_OBJECT_UNLOCK (navseek);
379 gst_navseek_start (GstBaseTransform * trans)
381 /* anything we should be doing here? */
386 gst_navseek_stop (GstBaseTransform * trans)
388 /* anything we should be doing here? */