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_event (GstBaseTransform * trans, GstEvent * event);
51 static GstFlowReturn gst_navseek_transform_ip (GstBaseTransform * basetrans,
53 static gboolean gst_navseek_handle_src_event (GstPad * pad, GstEvent * event);
54 static gboolean gst_navseek_stop (GstBaseTransform * trans);
55 static gboolean gst_navseek_start (GstBaseTransform * trans);
57 static void gst_navseek_set_property (GObject * object, guint prop_id,
58 const GValue * value, GParamSpec * pspec);
59 static void gst_navseek_get_property (GObject * object, guint prop_id,
60 GValue * value, GParamSpec * pspec);
62 GType gst_navseek_get_type (void);
63 GST_BOILERPLATE (GstNavSeek, gst_navseek, GstBaseTransform,
64 GST_TYPE_BASE_TRANSFORM);
67 gst_navseek_base_init (gpointer g_class)
69 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
71 gst_element_class_add_pad_template (element_class,
72 gst_static_pad_template_get (&navseek_sink_template));
73 gst_element_class_add_pad_template (element_class,
74 gst_static_pad_template_get (&navseek_src_template));
76 gst_element_class_set_details_simple (element_class,
77 "Seek based on left-right arrows", "Filter/Video",
78 "Seek based on navigation keys left-right",
79 "Jan Schmidt <thaytan@mad.scientist.com>");
83 gst_navseek_class_init (GstNavSeekClass * klass)
85 GstBaseTransformClass *gstbasetrans_class;
86 GObjectClass *gobject_class;
88 gobject_class = G_OBJECT_CLASS (klass);
89 gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);
91 gobject_class->set_property = gst_navseek_set_property;
92 gobject_class->get_property = gst_navseek_get_property;
94 g_object_class_install_property (gobject_class,
95 ARG_SEEKOFFSET, g_param_spec_double ("seek-offset", "Seek Offset",
96 "Time in seconds to seek by", 0.0, G_MAXDOUBLE, 5.0,
97 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
99 gstbasetrans_class->event = GST_DEBUG_FUNCPTR (gst_navseek_event);
100 gstbasetrans_class->transform_ip =
101 GST_DEBUG_FUNCPTR (gst_navseek_transform_ip);
102 gstbasetrans_class->start = GST_DEBUG_FUNCPTR (gst_navseek_start);
103 gstbasetrans_class->stop = GST_DEBUG_FUNCPTR (gst_navseek_stop);
107 gst_navseek_init (GstNavSeek * navseek, GstNavSeekClass * g_class)
109 gst_pad_set_event_function (GST_BASE_TRANSFORM (navseek)->srcpad,
110 GST_DEBUG_FUNCPTR (gst_navseek_handle_src_event));
112 gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (navseek), TRUE);
114 navseek->seek_offset = 5.0;
115 navseek->loop = FALSE;
116 navseek->grab_seg_start = FALSE;
117 navseek->grab_seg_end = FALSE;
118 navseek->segment_start = GST_CLOCK_TIME_NONE;
119 navseek->segment_end = GST_CLOCK_TIME_NONE;
123 gst_navseek_seek (GstNavSeek * navseek, gint64 offset)
125 GstFormat peer_format = GST_FORMAT_TIME;
130 /* Query for the current time then attempt to set to time + offset */
131 peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
132 ret = gst_pad_query_position (peer_pad, &peer_format, &peer_value);
134 if (ret && peer_format == GST_FORMAT_TIME) {
137 peer_value += offset;
141 event = gst_event_new_seek (1.0, GST_FORMAT_TIME,
142 GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH,
143 GST_SEEK_TYPE_SET, peer_value, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
145 gst_pad_send_event (peer_pad, event);
148 gst_object_unref (peer_pad);
152 gst_navseek_change_playback_rate (GstNavSeek * navseek, gdouble rate)
154 GstFormat peer_format = GST_FORMAT_TIME;
157 gint64 current_position;
159 peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
160 ret = gst_pad_query_position (peer_pad, &peer_format, ¤t_position);
162 if (ret && peer_format == GST_FORMAT_TIME) {
168 start = current_position;
171 /* negative rate: we play from stop to start */
173 stop = current_position;
176 event = gst_event_new_seek (rate, GST_FORMAT_TIME,
177 GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_SKIP,
178 GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_SET, stop);
180 gst_pad_send_event (peer_pad, event);
185 gst_navseek_segseek (GstNavSeek * navseek)
190 if ((navseek->segment_start == GST_CLOCK_TIME_NONE) ||
191 (navseek->segment_end == GST_CLOCK_TIME_NONE) ||
192 (!GST_PAD_IS_LINKED (GST_BASE_TRANSFORM (navseek)->sinkpad))) {
198 gst_event_new_seek (1.0, GST_FORMAT_TIME,
199 GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_SEGMENT,
200 GST_SEEK_TYPE_SET, navseek->segment_start, GST_SEEK_TYPE_SET,
201 navseek->segment_end);
204 gst_event_new_seek (1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_ACCURATE,
205 GST_SEEK_TYPE_SET, navseek->segment_start, GST_SEEK_TYPE_SET,
206 navseek->segment_end);
209 peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
210 gst_pad_send_event (peer_pad, event);
211 gst_object_unref (peer_pad);
215 gst_navseek_handle_src_event (GstPad * pad, GstEvent * event)
220 navseek = GST_NAVSEEK (GST_PAD_PARENT (pad));
222 switch (GST_EVENT_TYPE (event)) {
223 case GST_EVENT_NAVIGATION:
224 /* Check for a keyup and convert left/right to a seek event */
226 const GstStructure *structure;
227 const gchar *event_type;
229 structure = gst_event_get_structure (event);
230 g_return_val_if_fail (structure != NULL, FALSE);
232 event_type = gst_structure_get_string (structure, "event");
233 g_return_val_if_fail (event_type != NULL, FALSE);
235 if (strcmp (event_type, "key-press") == 0) {
238 key = gst_structure_get_string (structure, "key");
239 g_return_val_if_fail (key != NULL, FALSE);
241 if (strcmp (key, "Left") == 0) {
242 /* Seek backward by 5 secs */
243 gst_navseek_seek (navseek, -1.0 * navseek->seek_offset * GST_SECOND);
244 } else if (strcmp (key, "Right") == 0) {
246 gst_navseek_seek (navseek, navseek->seek_offset * GST_SECOND);
247 } else if (strcmp (key, "s") == 0) {
248 /* Grab the next frame as the start frame of a segment */
249 navseek->grab_seg_start = TRUE;
250 } else if (strcmp (key, "e") == 0) {
251 /* Grab the next frame as the end frame of a segment */
252 navseek->grab_seg_end = TRUE;
253 } else if (strcmp (key, "l") == 0) {
254 /* Toggle the loop flag. If we have both start and end segment times send a seek */
255 navseek->loop = !navseek->loop;
256 gst_navseek_segseek (navseek);
257 } else if (strcmp (key, "f") == 0) {
259 gst_navseek_change_playback_rate (navseek, 2.0);
260 } else if (strcmp (key, "r") == 0) {
262 gst_navseek_change_playback_rate (navseek, -2.0);
263 } else if (strcmp (key, "n") == 0) {
265 gst_navseek_change_playback_rate (navseek, 1.0);
270 gst_event_unref (event);
278 if (event && GST_PAD_IS_LINKED (GST_BASE_TRANSFORM (navseek)->sinkpad)) {
279 GstPad *peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
281 ret = gst_pad_send_event (peer_pad, event);
282 gst_object_unref (peer_pad);
289 gst_navseek_set_property (GObject * object, guint prop_id,
290 const GValue * value, GParamSpec * pspec)
292 GstNavSeek *navseek = GST_NAVSEEK (object);
296 GST_OBJECT_LOCK (navseek);
297 navseek->seek_offset = g_value_get_double (value);
298 GST_OBJECT_UNLOCK (navseek);
301 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
307 gst_navseek_get_property (GObject * object, guint prop_id,
308 GValue * value, GParamSpec * pspec)
310 GstNavSeek *navseek = GST_NAVSEEK (object);
314 GST_OBJECT_LOCK (navseek);
315 g_value_set_double (value, navseek->seek_offset);
316 GST_OBJECT_UNLOCK (navseek);
319 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
325 gst_navseek_event (GstBaseTransform * trans, GstEvent * event)
327 GstNavSeek *navseek = GST_NAVSEEK (trans);
329 switch (GST_EVENT_TYPE (event)) {
331 GST_OBJECT_LOCK (navseek);
333 gst_navseek_segseek (navseek);
334 GST_OBJECT_UNLOCK (navseek);
339 return GST_BASE_TRANSFORM_CLASS (parent_class)->event (trans, event);
343 gst_navseek_transform_ip (GstBaseTransform * basetrans, GstBuffer * buf)
345 GstNavSeek *navseek = GST_NAVSEEK (basetrans);
347 GST_OBJECT_LOCK (navseek);
349 if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
350 if (navseek->grab_seg_start) {
351 navseek->segment_start = GST_BUFFER_TIMESTAMP (buf);
352 navseek->segment_end = GST_CLOCK_TIME_NONE;
353 navseek->grab_seg_start = FALSE;
356 if (navseek->grab_seg_end) {
357 navseek->segment_end = GST_BUFFER_TIMESTAMP (buf);
358 navseek->grab_seg_end = FALSE;
359 gst_navseek_segseek (navseek);
363 GST_OBJECT_UNLOCK (navseek);
369 gst_navseek_start (GstBaseTransform * trans)
371 /* anything we should be doing here? */
376 gst_navseek_stop (GstBaseTransform * trans)
378 /* anything we should be doing here? */