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., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, 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 ARG_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_pad_template (element_class,
88 gst_static_pad_template_get (&navseek_sink_template));
89 gst_element_class_add_pad_template (element_class,
90 gst_static_pad_template_get (&navseek_src_template));
92 gst_element_class_set_details_simple (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)
121 GstFormat peer_format = GST_FORMAT_TIME;
126 /* Query for the current time then attempt to set to time + offset */
127 peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
128 ret = gst_pad_query_position (peer_pad, &peer_format, &peer_value);
130 if (ret && peer_format == GST_FORMAT_TIME) {
133 peer_value += offset;
137 event = gst_event_new_seek (1.0, GST_FORMAT_TIME,
138 GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH,
139 GST_SEEK_TYPE_SET, peer_value, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
141 gst_pad_send_event (peer_pad, event);
144 gst_object_unref (peer_pad);
148 gst_navseek_change_playback_rate (GstNavSeek * navseek, gdouble rate)
150 GstFormat peer_format = GST_FORMAT_TIME;
153 gint64 current_position;
155 peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
156 ret = gst_pad_query_position (peer_pad, &peer_format, ¤t_position);
158 if (ret && peer_format == GST_FORMAT_TIME) {
164 start = current_position;
167 /* negative rate: we play from stop to start */
169 stop = current_position;
172 event = gst_event_new_seek (rate, GST_FORMAT_TIME,
173 GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_SKIP,
174 GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_SET, stop);
176 gst_pad_send_event (peer_pad, event);
181 gst_navseek_segseek (GstNavSeek * navseek)
186 if ((navseek->segment_start == GST_CLOCK_TIME_NONE) ||
187 (navseek->segment_end == GST_CLOCK_TIME_NONE) ||
188 (!GST_PAD_IS_LINKED (GST_BASE_TRANSFORM (navseek)->sinkpad))) {
194 gst_event_new_seek (1.0, GST_FORMAT_TIME,
195 GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_SEGMENT,
196 GST_SEEK_TYPE_SET, navseek->segment_start, GST_SEEK_TYPE_SET,
197 navseek->segment_end);
200 gst_event_new_seek (1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_ACCURATE,
201 GST_SEEK_TYPE_SET, navseek->segment_start, GST_SEEK_TYPE_SET,
202 navseek->segment_end);
205 peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
206 gst_pad_send_event (peer_pad, event);
207 gst_object_unref (peer_pad);
211 gst_navseek_src_event (GstBaseTransform * trans, GstEvent * event)
216 navseek = GST_NAVSEEK (trans);
218 switch (GST_EVENT_TYPE (event)) {
219 case GST_EVENT_NAVIGATION:
221 /* Check for a keyup and convert left/right to a seek event */
222 const GstStructure *structure;
223 const gchar *event_type;
225 structure = gst_event_get_structure (event);
226 g_return_val_if_fail (structure != NULL, FALSE);
228 event_type = gst_structure_get_string (structure, "event");
229 g_return_val_if_fail (event_type != NULL, FALSE);
231 if (strcmp (event_type, "key-press") == 0) {
234 key = gst_structure_get_string (structure, "key");
235 g_return_val_if_fail (key != NULL, FALSE);
237 if (strcmp (key, "Left") == 0) {
238 /* Seek backward by 5 secs */
239 gst_navseek_seek (navseek, -1.0 * navseek->seek_offset * GST_SECOND);
240 } else if (strcmp (key, "Right") == 0) {
242 gst_navseek_seek (navseek, navseek->seek_offset * GST_SECOND);
243 } else if (strcmp (key, "s") == 0) {
244 /* Grab the next frame as the start frame of a segment */
245 navseek->grab_seg_start = TRUE;
246 } else if (strcmp (key, "e") == 0) {
247 /* Grab the next frame as the end frame of a segment */
248 navseek->grab_seg_end = TRUE;
249 } else if (strcmp (key, "l") == 0) {
250 /* Toggle the loop flag. If we have both start and end segment times send a seek */
251 navseek->loop = !navseek->loop;
252 gst_navseek_segseek (navseek);
253 } else if (strcmp (key, "f") == 0) {
255 gst_navseek_change_playback_rate (navseek, 2.0);
256 } else if (strcmp (key, "r") == 0) {
258 gst_navseek_change_playback_rate (navseek, -2.0);
259 } else if (strcmp (key, "n") == 0) {
261 gst_navseek_change_playback_rate (navseek, 1.0);
266 gst_event_unref (event);
275 ret = GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans, event);
281 gst_navseek_set_property (GObject * object, guint prop_id,
282 const GValue * value, GParamSpec * pspec)
284 GstNavSeek *navseek = GST_NAVSEEK (object);
288 GST_OBJECT_LOCK (navseek);
289 navseek->seek_offset = g_value_get_double (value);
290 GST_OBJECT_UNLOCK (navseek);
293 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
299 gst_navseek_get_property (GObject * object, guint prop_id,
300 GValue * value, GParamSpec * pspec)
302 GstNavSeek *navseek = GST_NAVSEEK (object);
306 GST_OBJECT_LOCK (navseek);
307 g_value_set_double (value, navseek->seek_offset);
308 GST_OBJECT_UNLOCK (navseek);
311 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
317 gst_navseek_sink_event (GstBaseTransform * trans, GstEvent * event)
319 GstNavSeek *navseek = GST_NAVSEEK (trans);
321 switch (GST_EVENT_TYPE (event)) {
323 GST_OBJECT_LOCK (navseek);
325 gst_navseek_segseek (navseek);
326 GST_OBJECT_UNLOCK (navseek);
331 return GST_BASE_TRANSFORM_CLASS (parent_class)->sink_event (trans, event);
335 gst_navseek_transform_ip (GstBaseTransform * basetrans, GstBuffer * buf)
337 GstNavSeek *navseek = GST_NAVSEEK (basetrans);
339 GST_OBJECT_LOCK (navseek);
341 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
342 if (navseek->grab_seg_start) {
343 navseek->segment_start = GST_BUFFER_TIMESTAMP (buf);
344 navseek->segment_end = GST_CLOCK_TIME_NONE;
345 navseek->grab_seg_start = FALSE;
348 if (navseek->grab_seg_end) {
349 navseek->segment_end = GST_BUFFER_TIMESTAMP (buf);
350 navseek->grab_seg_end = FALSE;
351 gst_navseek_segseek (navseek);
355 GST_OBJECT_UNLOCK (navseek);
361 gst_navseek_start (GstBaseTransform * trans)
363 /* anything we should be doing here? */
368 gst_navseek_stop (GstBaseTransform * trans)
370 /* anything we should be doing here? */