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264 lines
7.2 KiB
C
264 lines
7.2 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstdisksink.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gst/gst.h>
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#include "gstdisksink.h"
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GstElementDetails gst_disksink_details = {
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"Disk Sink",
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"Sink",
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"Disk hole for data",
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VERSION,
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"Thomas <thomas@apestaart.org>",
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"(C) 2001"
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};
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/* DiskSink signals and args */
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enum {
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/* FILL ME */
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SIGNAL_HANDOFF,
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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ARG_LOCATION,
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};
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static void gst_disksink_class_init (GstDiskSinkClass *klass);
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static void gst_disksink_init (GstDiskSink *disksink);
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static void gst_disksink_set_property (GObject *object, guint prop_id,
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const GValue *value, GParamSpec *pspec);
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static void gst_disksink_get_property (GObject *object, guint prop_id,
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GValue *value, GParamSpec *pspec);
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static gboolean gst_disksink_open_file (GstDiskSink *sink);
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static void gst_disksink_close_file (GstDiskSink *sink);
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static void gst_disksink_chain (GstPad *pad,GstBuffer *buf);
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static GstElementStateReturn gst_disksink_change_state (GstElement *element);
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static GstElementClass *parent_class = NULL;
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static guint gst_disksink_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_disksink_get_type (void)
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{
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static GType disksink_type = 0;
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if (!disksink_type) {
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static const GTypeInfo disksink_info = {
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sizeof(GstDiskSinkClass), NULL,
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NULL,
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(GClassInitFunc)gst_disksink_class_init,
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NULL,
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NULL,
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sizeof(GstDiskSink),
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0,
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(GInstanceInitFunc)gst_disksink_init,
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};
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disksink_type = g_type_register_static (GST_TYPE_ELEMENT, "GstDiskSink", &disksink_info, 0);
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}
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return disksink_type;
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}
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static void
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gst_disksink_class_init (GstDiskSinkClass *klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass*)klass;
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gstelement_class = (GstElementClass*)klass;
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_LOCATION,
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g_param_spec_string("location","location","location",
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NULL,G_PARAM_READWRITE)); // CHECKME!
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gst_disksink_signals[SIGNAL_HANDOFF] =
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g_signal_new ("handoff", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstDiskSinkClass, handoff), NULL, NULL,
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g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
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gobject_class->set_property = gst_disksink_set_property;
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gobject_class->get_property = gst_disksink_get_property;
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gstelement_class->change_state = gst_disksink_change_state;
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}
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static void
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gst_disksink_init (GstDiskSink *disksink)
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{
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GstPad *pad;
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pad = gst_pad_new ("sink", GST_PAD_SINK);
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gst_element_add_pad (GST_ELEMENT (disksink), pad);
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gst_pad_set_chain_function (pad, gst_disksink_chain);
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disksink->filename = NULL;
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disksink->file = NULL;
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}
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static void
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gst_disksink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
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{
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GstDiskSink *sink;
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/* it's not null if we got it, but it might not be ours */
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sink = GST_DISKSINK (object);
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switch (prop_id) {
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case ARG_LOCATION:
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/* the element must be stopped or paused in order to do this */
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g_return_if_fail ((GST_STATE (sink) < GST_STATE_PLAYING)
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|| (GST_STATE (sink) == GST_STATE_PAUSED));
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if (sink->filename)
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g_free (sink->filename);
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sink->filename = g_strdup (g_value_get_string (value));
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if ( (GST_STATE (sink) == GST_STATE_PAUSED)
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&& (sink->filename != NULL))
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{
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gst_disksink_close_file (sink);
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gst_disksink_open_file (sink);
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}
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break;
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default:
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break;
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}
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}
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static void
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gst_disksink_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
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{
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GstDiskSink *sink;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail (GST_IS_DISKSINK (object));
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sink = GST_DISKSINK (object);
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switch (prop_id) {
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case ARG_LOCATION:
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g_value_set_string (value, sink->filename);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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gst_disksink_open_file (GstDiskSink *sink)
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{
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g_return_val_if_fail (!GST_FLAG_IS_SET (sink, GST_DISKSINK_OPEN), FALSE);
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/* open the file */
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sink->file = fopen (sink->filename, "w");
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if (sink->file == NULL) {
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perror ("open");
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gst_element_error (GST_ELEMENT (sink), g_strconcat("opening file \"", sink->filename, "\"", NULL));
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return FALSE;
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}
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GST_FLAG_SET (sink, GST_DISKSINK_OPEN);
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return TRUE;
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}
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static void
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gst_disksink_close_file (GstDiskSink *sink)
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{
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g_return_if_fail (GST_FLAG_IS_SET (sink, GST_DISKSINK_OPEN));
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if (fclose (sink->file) != 0)
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{
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perror ("close");
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gst_element_error (GST_ELEMENT (sink), g_strconcat("closing file \"", sink->filename, "\"", NULL));
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}
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else {
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GST_FLAG_UNSET (sink, GST_DISKSINK_OPEN);
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}
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}
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/**
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* gst_disksink_chain:
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* @pad: the pad this disksink is connected to
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* @buf: the buffer that has to be absorbed
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*
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* take the buffer from the pad and write to file if it's open
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*/
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static void
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gst_disksink_chain (GstPad *pad, GstBuffer *buf)
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{
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GstDiskSink *disksink;
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gint bytes_written = 0;
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g_return_if_fail (pad != NULL);
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g_return_if_fail (GST_IS_PAD (pad));
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g_return_if_fail (buf != NULL);
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disksink = GST_DISKSINK (gst_pad_get_parent (pad));
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if (GST_FLAG_IS_SET (disksink, GST_DISKSINK_OPEN))
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{
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bytes_written = fwrite (GST_BUFFER_DATA (buf), 1, GST_BUFFER_SIZE (buf), disksink->file);
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if (bytes_written < GST_BUFFER_SIZE (buf))
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{
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printf ("disksink : Warning : %d bytes should be written, only %d bytes written\n",
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GST_BUFFER_SIZE (buf), bytes_written);
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}
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}
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gst_buffer_unref (buf);
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g_signal_emit (G_OBJECT (disksink), gst_disksink_signals[SIGNAL_HANDOFF], 0,
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disksink);
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}
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static GstElementStateReturn
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gst_disksink_change_state (GstElement *element)
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{
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g_return_val_if_fail (GST_IS_DISKSINK (element), GST_STATE_FAILURE);
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if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
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if (GST_FLAG_IS_SET (element, GST_DISKSINK_OPEN))
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gst_disksink_close_file (GST_DISKSINK (element));
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} else {
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if (!GST_FLAG_IS_SET (element, GST_DISKSINK_OPEN)) {
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if (!gst_disksink_open_file (GST_DISKSINK (element)))
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return GST_STATE_FAILURE;
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}
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}
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if (GST_ELEMENT_CLASS (parent_class)->change_state)
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return GST_ELEMENT_CLASS (parent_class)->change_state (element);
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return GST_STATE_SUCCESS;
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}
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