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_arg (GtkObject *object, GtkArg *arg, guint id);
static void gst_disksink_get_arg (GtkObject *object, GtkArg *arg, guint id);
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 };
GtkType
gst_disksink_get_type (void)
{
static GtkType disksink_type = 0;
if (!disksink_type) {
static const GtkTypeInfo disksink_info = {
"GstDiskSink",
sizeof(GstDiskSink),
sizeof(GstDiskSinkClass),
(GtkClassInitFunc)gst_disksink_class_init,
(GtkObjectInitFunc)gst_disksink_init,
(GtkArgSetFunc)gst_disksink_set_arg,
(GtkArgGetFunc)gst_disksink_get_arg,
(GtkClassInitFunc)NULL, /* deprecated, do not use ! */
};
disksink_type = gtk_type_unique (GST_TYPE_ELEMENT, &disksink_info);
}
return disksink_type;
}
static void
gst_disksink_class_init (GstDiskSinkClass *klass)
{
GtkObjectClass *gtkobject_class;
GstElementClass *gstelement_class;
gtkobject_class = (GtkObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = gtk_type_class (GST_TYPE_ELEMENT);
gtk_object_add_arg_type ("GstDiskSink::location", GST_TYPE_FILENAME,
GTK_ARG_READWRITE, ARG_LOCATION);
gst_disksink_signals[SIGNAL_HANDOFF] =
gtk_signal_new ("handoff", GTK_RUN_LAST, gtkobject_class->type,
GTK_SIGNAL_OFFSET (GstDiskSinkClass, handoff),
gtk_marshal_NONE__NONE, GTK_TYPE_NONE, 0);
gtk_object_class_add_signals (gtkobject_class, gst_disksink_signals,
LAST_SIGNAL);
gtkobject_class->set_arg = gst_disksink_set_arg;
gtkobject_class->get_arg = gst_disksink_get_arg;
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_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstDiskSink *sink;
/* it's not null if we got it, but it might not be ours */
sink = GST_DISKSINK (object);
switch(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 (GTK_VALUE_STRING (*arg));
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_arg (GtkObject *object, GtkArg *arg, guint id)
{
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 (id) {
case ARG_LOCATION:
GTK_VALUE_STRING (*arg) = sink->filename;
break;
default:
arg->type = GTK_TYPE_INVALID;
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;
guint16 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);
gtk_signal_emit (GTK_OBJECT (disksink), gst_disksink_signals[SIGNAL_HANDOFF],
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;
}