gstreamer/gst/elements/gstdisksink.c

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstdisksink.c:
*
* 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.
*/
#include <gst/gst.h>
#include "gstdisksink.h"
GstElementDetails gst_disksink_details = {
"Disk Sink",
"Sink",
"Disk hole for data",
VERSION,
"Thomas <thomas@apestaart.org>",
"(C) 2001"
};
/* DiskSink signals and args */
enum {
/* FILL ME */
SIGNAL_HANDOFF,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_LOCATION,
};
static void gst_disksink_class_init (GstDiskSinkClass *klass);
static void gst_disksink_init (GstDiskSink *disksink);
static void gst_disksink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
static void gst_disksink_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
static gboolean gst_disksink_open_file (GstDiskSink *sink);
static void gst_disksink_close_file (GstDiskSink *sink);
static void gst_disksink_chain (GstPad *pad,GstBuffer *buf);
static GstElementStateReturn gst_disksink_change_state (GstElement *element);
static GstElementClass *parent_class = NULL;
static guint gst_disksink_signals[LAST_SIGNAL] = { 0 };
GType
gst_disksink_get_type (void)
{
static GType disksink_type = 0;
if (!disksink_type) {
static const GTypeInfo disksink_info = {
sizeof(GstDiskSinkClass), NULL,
NULL,
(GClassInitFunc)gst_disksink_class_init,
NULL,
NULL,
sizeof(GstDiskSink),
0,
(GInstanceInitFunc)gst_disksink_init,
};
disksink_type = g_type_register_static (GST_TYPE_ELEMENT, "GstDiskSink", &disksink_info, 0);
}
return disksink_type;
}
static void
gst_disksink_class_init (GstDiskSinkClass *klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_LOCATION,
g_param_spec_string("location","location","location",
NULL,G_PARAM_READWRITE)); // CHECKME!
gst_disksink_signals[SIGNAL_HANDOFF] =
g_signal_newc ("handoff", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstDiskSinkClass, handoff), NULL, NULL,
g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
gobject_class->set_property = gst_disksink_set_property;
gobject_class->get_property = gst_disksink_get_property;
gstelement_class->change_state = gst_disksink_change_state;
}
static void
gst_disksink_init (GstDiskSink *disksink)
{
GstPad *pad;
pad = gst_pad_new ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (disksink), pad);
gst_pad_set_chain_function (pad, gst_disksink_chain);
disksink->filename = NULL;
disksink->file = NULL;
}
static void
gst_disksink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstDiskSink *sink;
/* it's not null if we got it, but it might not be ours */
sink = GST_DISKSINK (object);
switch (prop_id) {
case ARG_LOCATION:
/* the element must be stopped or paused in order to do this */
g_return_if_fail ((GST_STATE (sink) < GST_STATE_PLAYING)
|| (GST_STATE (sink) == GST_STATE_PAUSED));
if (sink->filename)
g_free (sink->filename);
sink->filename = g_strdup (g_value_get_string (value));
if ( (GST_STATE (sink) == GST_STATE_PAUSED)
&& (sink->filename != NULL))
{
gst_disksink_close_file (sink);
gst_disksink_open_file (sink);
}
break;
default:
break;
}
}
static void
gst_disksink_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstDiskSink *sink;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_DISKSINK (object));
sink = GST_DISKSINK (object);
switch (prop_id) {
case ARG_LOCATION:
g_value_set_string (value, sink->filename);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_disksink_open_file (GstDiskSink *sink)
{
g_return_val_if_fail (!GST_FLAG_IS_SET (sink, GST_DISKSINK_OPEN), FALSE);
/* open the file */
sink->file = fopen (sink->filename, "w");
if (sink->file == NULL) {
perror ("open");
gst_element_error (GST_ELEMENT (sink), g_strconcat("opening file \"", sink->filename, "\"", NULL));
return FALSE;
}
GST_FLAG_SET (sink, GST_DISKSINK_OPEN);
return TRUE;
}
static void
gst_disksink_close_file (GstDiskSink *sink)
{
g_return_if_fail (GST_FLAG_IS_SET (sink, GST_DISKSINK_OPEN));
if (fclose (sink->file) != 0)
{
perror ("close");
gst_element_error (GST_ELEMENT (sink), g_strconcat("closing file \"", sink->filename, "\"", NULL));
}
else {
GST_FLAG_UNSET (sink, GST_DISKSINK_OPEN);
}
}
/**
* gst_disksink_chain:
* @pad: the pad this disksink is connected to
* @buf: the buffer that has to be absorbed
*
* take the buffer from the pad and write to file if it's open
*/
static void
gst_disksink_chain (GstPad *pad, GstBuffer *buf)
{
GstDiskSink *disksink;
gint bytes_written = 0;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
disksink = GST_DISKSINK (gst_pad_get_parent (pad));
if (GST_FLAG_IS_SET (disksink, GST_DISKSINK_OPEN))
{
bytes_written = fwrite (GST_BUFFER_DATA (buf), 1, GST_BUFFER_SIZE (buf), disksink->file);
if (bytes_written < GST_BUFFER_SIZE (buf))
{
printf ("disksink : Warning : %d bytes should be written, only %d bytes written\n",
GST_BUFFER_SIZE (buf), bytes_written);
}
}
gst_buffer_unref (buf);
g_signal_emit (G_OBJECT (disksink), gst_disksink_signals[SIGNAL_HANDOFF], 0,
disksink);
}
static GstElementStateReturn
gst_disksink_change_state (GstElement *element)
{
g_return_val_if_fail (GST_IS_DISKSINK (element), GST_STATE_FAILURE);
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_FLAG_IS_SET (element, GST_DISKSINK_OPEN))
gst_disksink_close_file (GST_DISKSINK (element));
} else {
if (!GST_FLAG_IS_SET (element, GST_DISKSINK_OPEN)) {
if (!gst_disksink_open_file (GST_DISKSINK (element)))
return GST_STATE_FAILURE;
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}