gstreamer/gst/debugutils/gstnavseek.c
2011-09-14 21:32:42 +01:00

399 lines
12 KiB
C

/* 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>
enum
{
ARG_0,
ARG_SEEKOFFSET
};
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 gboolean gst_navseek_event (GstBaseTransform * trans, GstEvent * event);
static GstFlowReturn gst_navseek_transform_ip (GstBaseTransform * basetrans,
GstBuffer * buf);
static gboolean gst_navseek_handle_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_navseek_stop (GstBaseTransform * trans);
static gboolean gst_navseek_start (GstBaseTransform * trans);
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);
GType gst_navseek_get_type (void);
GST_BOILERPLATE (GstNavSeek, gst_navseek, GstBaseTransform,
GST_TYPE_BASE_TRANSFORM);
static void
gst_navseek_base_init (gpointer g_class)
{
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_simple (element_class,
"Seek based on left-right arrows", "Filter/Video",
"Seek based on navigation keys left-right",
"Jan Schmidt <thaytan@mad.scientist.com>");
}
static void
gst_navseek_class_init (GstNavSeekClass * klass)
{
GstBaseTransformClass *gstbasetrans_class;
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (klass);
gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);
gobject_class->set_property = gst_navseek_set_property;
gobject_class->get_property = gst_navseek_get_property;
g_object_class_install_property (gobject_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 | G_PARAM_STATIC_STRINGS));
gstbasetrans_class->event = GST_DEBUG_FUNCPTR (gst_navseek_event);
gstbasetrans_class->transform_ip =
GST_DEBUG_FUNCPTR (gst_navseek_transform_ip);
gstbasetrans_class->start = GST_DEBUG_FUNCPTR (gst_navseek_start);
gstbasetrans_class->stop = GST_DEBUG_FUNCPTR (gst_navseek_stop);
}
static void
gst_navseek_init (GstNavSeek * navseek, GstNavSeekClass * g_class)
{
gst_pad_set_event_function (GST_BASE_TRANSFORM (navseek)->srcpad,
GST_DEBUG_FUNCPTR (gst_navseek_handle_src_event));
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (navseek), TRUE);
navseek->seek_offset = 5.0;
navseek->loop = FALSE;
navseek->grab_seg_start = FALSE;
navseek->grab_seg_end = FALSE;
navseek->segment_start = GST_CLOCK_TIME_NONE;
navseek->segment_end = GST_CLOCK_TIME_NONE;
}
static void
gst_navseek_seek (GstNavSeek * navseek, gint64 offset)
{
GstFormat peer_format = GST_FORMAT_TIME;
gboolean ret;
GstPad *peer_pad;
gint64 peer_value;
/* Query for the current time then attempt to set to time + offset */
peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
ret = gst_pad_query_position (peer_pad, &peer_format, &peer_value);
if (ret && peer_format == GST_FORMAT_TIME) {
GstEvent *event;
peer_value += offset;
if (peer_value < 0)
peer_value = 0;
event = gst_event_new_seek (1.0, GST_FORMAT_TIME,
GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH,
GST_SEEK_TYPE_SET, peer_value, GST_SEEK_TYPE_NONE, GST_CLOCK_TIME_NONE);
gst_pad_send_event (peer_pad, event);
}
gst_object_unref (peer_pad);
}
static void
gst_navseek_change_playback_rate (GstNavSeek * navseek, gdouble rate)
{
GstFormat peer_format = GST_FORMAT_TIME;
gboolean ret;
GstPad *peer_pad;
gint64 current_position;
peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
ret = gst_pad_query_position (peer_pad, &peer_format, &current_position);
if (ret && peer_format == GST_FORMAT_TIME) {
GstEvent *event;
gint64 start;
gint64 stop;
if (rate > 0.0) {
start = current_position;
stop = -1;
} else {
/* negative rate: we play from stop to start */
start = 0;
stop = current_position;
}
event = gst_event_new_seek (rate, GST_FORMAT_TIME,
GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_SKIP,
GST_SEEK_TYPE_SET, start, GST_SEEK_TYPE_SET, stop);
gst_pad_send_event (peer_pad, event);
}
}
static void
gst_navseek_segseek (GstNavSeek * navseek)
{
GstEvent *event;
GstPad *peer_pad;
if ((navseek->segment_start == GST_CLOCK_TIME_NONE) ||
(navseek->segment_end == GST_CLOCK_TIME_NONE) ||
(!GST_PAD_IS_LINKED (GST_BASE_TRANSFORM (navseek)->sinkpad))) {
return;
}
if (navseek->loop) {
event =
gst_event_new_seek (1.0, GST_FORMAT_TIME,
GST_SEEK_FLAG_ACCURATE | GST_SEEK_FLAG_SEGMENT,
GST_SEEK_TYPE_SET, navseek->segment_start, GST_SEEK_TYPE_SET,
navseek->segment_end);
} else {
event =
gst_event_new_seek (1.0, GST_FORMAT_TIME, GST_SEEK_FLAG_ACCURATE,
GST_SEEK_TYPE_SET, navseek->segment_start, GST_SEEK_TYPE_SET,
navseek->segment_end);
}
peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
gst_pad_send_event (peer_pad, event);
gst_object_unref (peer_pad);
}
static void
gst_navseek_toggle_play_pause (GstNavSeek * navseek)
{
GstStateChangeReturn sret;
GstState current, pending, state;
sret = gst_element_get_state (GST_ELEMENT (navseek), &current, &pending, 0);
if (sret == GST_STATE_CHANGE_FAILURE)
return;
state = (pending != GST_STATE_VOID_PENDING) ? pending : current;
gst_element_post_message (GST_ELEMENT (navseek),
gst_message_new_request_state (GST_OBJECT (navseek),
(state == GST_STATE_PLAYING) ? GST_STATE_PAUSED : GST_STATE_PLAYING));
}
static gboolean
gst_navseek_handle_src_event (GstPad * pad, GstEvent * event)
{
GstNavSeek *navseek;
gboolean ret = TRUE;
navseek = GST_NAVSEEK (GST_PAD_PARENT (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NAVIGATION:
/* Check for a keyup and convert left/right to a seek event */
{
const GstStructure *structure;
const gchar *event_type;
structure = gst_event_get_structure (event);
g_return_val_if_fail (structure != NULL, FALSE);
event_type = gst_structure_get_string (structure, "event");
g_return_val_if_fail (event_type != NULL, FALSE);
if (strcmp (event_type, "key-press") == 0) {
const gchar *key;
key = gst_structure_get_string (structure, "key");
g_return_val_if_fail (key != NULL, FALSE);
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 if (strcmp (key, "s") == 0) {
/* Grab the next frame as the start frame of a segment */
navseek->grab_seg_start = TRUE;
} else if (strcmp (key, "e") == 0) {
/* Grab the next frame as the end frame of a segment */
navseek->grab_seg_end = TRUE;
} else if (strcmp (key, "l") == 0) {
/* Toggle the loop flag. If we have both start and end segment times send a seek */
navseek->loop = !navseek->loop;
gst_navseek_segseek (navseek);
} else if (strcmp (key, "f") == 0) {
/* fast forward */
gst_navseek_change_playback_rate (navseek, 2.0);
} else if (strcmp (key, "r") == 0) {
/* rewind */
gst_navseek_change_playback_rate (navseek, -2.0);
} else if (strcmp (key, "n") == 0) {
/* normal speed */
gst_navseek_change_playback_rate (navseek, 1.0);
} else if (strcmp (key, "space") == 0) {
gst_navseek_toggle_play_pause (navseek);
}
} else {
break;
}
gst_event_unref (event);
event = NULL;
}
break;
default:
break;
}
if (event && GST_PAD_IS_LINKED (GST_BASE_TRANSFORM (navseek)->sinkpad)) {
GstPad *peer_pad = gst_pad_get_peer (GST_BASE_TRANSFORM (navseek)->sinkpad);
ret = gst_pad_send_event (peer_pad, event);
gst_object_unref (peer_pad);
}
return ret;
}
static void
gst_navseek_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstNavSeek *navseek = GST_NAVSEEK (object);
switch (prop_id) {
case ARG_SEEKOFFSET:
GST_OBJECT_LOCK (navseek);
navseek->seek_offset = g_value_get_double (value);
GST_OBJECT_UNLOCK (navseek);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_navseek_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstNavSeek *navseek = GST_NAVSEEK (object);
switch (prop_id) {
case ARG_SEEKOFFSET:
GST_OBJECT_LOCK (navseek);
g_value_set_double (value, navseek->seek_offset);
GST_OBJECT_UNLOCK (navseek);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_navseek_event (GstBaseTransform * trans, GstEvent * event)
{
GstNavSeek *navseek = GST_NAVSEEK (trans);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:
GST_OBJECT_LOCK (navseek);
if (navseek->loop)
gst_navseek_segseek (navseek);
GST_OBJECT_UNLOCK (navseek);
break;
default:
break;
}
return GST_BASE_TRANSFORM_CLASS (parent_class)->event (trans, event);
}
static GstFlowReturn
gst_navseek_transform_ip (GstBaseTransform * basetrans, GstBuffer * buf)
{
GstNavSeek *navseek = GST_NAVSEEK (basetrans);
GST_OBJECT_LOCK (navseek);
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) {
if (navseek->grab_seg_start) {
navseek->segment_start = GST_BUFFER_TIMESTAMP (buf);
navseek->segment_end = GST_CLOCK_TIME_NONE;
navseek->grab_seg_start = FALSE;
}
if (navseek->grab_seg_end) {
navseek->segment_end = GST_BUFFER_TIMESTAMP (buf);
navseek->grab_seg_end = FALSE;
gst_navseek_segseek (navseek);
}
}
GST_OBJECT_UNLOCK (navseek);
return GST_FLOW_OK;
}
static gboolean
gst_navseek_start (GstBaseTransform * trans)
{
/* anything we should be doing here? */
return TRUE;
}
static gboolean
gst_navseek_stop (GstBaseTransform * trans)
{
/* anything we should be doing here? */
return TRUE;
}