2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
23 #include <sys/types.h>
32 #define DEFAULT_BLOCKSIZE 4096
34 GstElementDetails gst_fdsrc_details =
39 "Synchronous read from a file",
41 "Erik Walthinsen <omega@cse.ogi.edu>",
46 /* FdSrc signals and args */
59 static void gst_fdsrc_class_init (GstFdSrcClass *klass);
60 static void gst_fdsrc_init (GstFdSrc *fdsrc);
62 static void gst_fdsrc_set_property (GObject *object, guint prop_id,
63 const GValue *value, GParamSpec *pspec);
64 static void gst_fdsrc_get_property (GObject *object, guint prop_id,
65 GValue *value, GParamSpec *pspec);
67 static GstBuffer * gst_fdsrc_get (GstPad *pad);
70 static GstElementClass *parent_class = NULL;
71 /*static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };*/
74 gst_fdsrc_get_type (void)
76 static GType fdsrc_type = 0;
79 static const GTypeInfo fdsrc_info = {
80 sizeof(GstFdSrcClass),
83 (GClassInitFunc)gst_fdsrc_class_init,
88 (GInstanceInitFunc)gst_fdsrc_init,
90 fdsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFdSrc", &fdsrc_info, 0);
96 gst_fdsrc_class_init (GstFdSrcClass *klass)
98 GObjectClass *gobject_class;
100 gobject_class = (GObjectClass*)klass;
102 parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
104 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
105 g_param_spec_int ("fd", "fd", "An open file descriptor to read from",
106 0, G_MAXINT, 0, G_PARAM_READWRITE));
107 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
108 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
109 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
111 gobject_class->set_property = gst_fdsrc_set_property;
112 gobject_class->get_property = gst_fdsrc_get_property;
115 static void gst_fdsrc_init(GstFdSrc *fdsrc) {
116 fdsrc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
118 gst_pad_set_get_function (fdsrc->srcpad, gst_fdsrc_get);
119 gst_element_add_pad (GST_ELEMENT (fdsrc), fdsrc->srcpad);
122 fdsrc->curoffset = 0;
123 fdsrc->blocksize = DEFAULT_BLOCKSIZE;
129 gst_fdsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
133 /* it's not null if we got it, but it might not be ours */
134 g_return_if_fail (GST_IS_FDSRC (object));
136 src = GST_FDSRC (object);
140 src->fd = g_value_get_int (value);
143 src->blocksize = g_value_get_ulong (value);
151 gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
155 /* it's not null if we got it, but it might not be ours */
156 g_return_if_fail (GST_IS_FDSRC (object));
158 src = GST_FDSRC (object);
162 g_value_set_ulong (value, src->blocksize);
165 g_value_set_int (value, src->fd);
168 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
174 gst_fdsrc_get(GstPad *pad)
180 src = GST_FDSRC (gst_pad_get_parent (pad));
182 /* create the buffer */
183 buf = gst_buffer_new_and_alloc (src->blocksize);
185 /* read it in from the file */
186 readbytes = read (src->fd, GST_BUFFER_DATA (buf), src->blocksize);
188 /* if nothing was read, we're in eos */
189 if (readbytes == 0) {
190 gst_element_set_eos (GST_ELEMENT (src));
191 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
194 if (readbytes == -1) {
195 g_error ("Error reading from file descriptor. Ending stream.\n");
196 gst_element_set_eos (GST_ELEMENT (src));
197 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
200 GST_BUFFER_OFFSET (buf) = src->curoffset;
201 GST_BUFFER_SIZE (buf) = readbytes;
202 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
203 src->curoffset += readbytes;
205 /* we're done, return the buffer */