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>
33 GstElementDetails gst_fdsrc_details = {
36 "Synchronous read from a file",
38 "Erik Walthinsen <omega@cse.ogi.edu>",
43 /* FdSrc signals and args */
57 static void gst_fdsrc_class_init (GstFdSrcClass *klass);
58 static void gst_fdsrc_init (GstFdSrc *fdsrc);
60 static void gst_fdsrc_set_property (GObject *object, guint prop_id,
61 const GValue *value, GParamSpec *pspec);
62 static void gst_fdsrc_get_property (GObject *object, guint prop_id,
63 GValue *value, GParamSpec *pspec);
65 static GstBuffer * gst_fdsrc_get (GstPad *pad);
68 static GstElementClass *parent_class = NULL;
69 /*static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };*/
72 gst_fdsrc_get_type (void)
74 static GType fdsrc_type = 0;
77 static const GTypeInfo fdsrc_info = {
78 sizeof(GstFdSrcClass), NULL,
80 (GClassInitFunc)gst_fdsrc_class_init,
85 (GInstanceInitFunc)gst_fdsrc_init,
87 fdsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFdSrc", &fdsrc_info, 0);
93 gst_fdsrc_class_init (GstFdSrcClass *klass)
95 GObjectClass *gobject_class;
97 gobject_class = (GObjectClass*)klass;
99 parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
101 gst_element_class_install_std_props (
102 GST_ELEMENT_CLASS (klass),
103 "location", ARG_LOCATION, G_PARAM_WRITABLE,
104 "bytesperread", ARG_BYTESPERREAD, G_PARAM_READWRITE,
105 "offset", ARG_OFFSET, G_PARAM_READABLE,
108 gobject_class->set_property = gst_fdsrc_set_property;
109 gobject_class->get_property = gst_fdsrc_get_property;
112 static void gst_fdsrc_init(GstFdSrc *fdsrc) {
113 fdsrc->srcpad = gst_pad_new("src",GST_PAD_SRC);
114 gst_pad_set_get_function(fdsrc->srcpad,gst_fdsrc_get);
115 gst_element_add_pad(GST_ELEMENT(fdsrc),fdsrc->srcpad);
118 fdsrc->curoffset = 0;
119 fdsrc->bytes_per_read = 4096;
125 gst_fdsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
130 /* it's not null if we got it, but it might not be ours */
131 g_return_if_fail (GST_IS_FDSRC (object));
133 src = GST_FDSRC (object);
137 /* the element must not be playing in order to do this */
138 g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
140 /* if we get a NULL, consider it to be a fd of 0 */
141 if (g_value_get_string (value) == NULL) {
142 gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
144 /* otherwise set the new filename */
146 if (sscanf (g_value_get_string (value), "%d", &fd))
150 case ARG_BYTESPERREAD:
151 src->bytes_per_read = g_value_get_int (value);
159 gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
163 /* it's not null if we got it, but it might not be ours */
164 g_return_if_fail (GST_IS_FDSRC (object));
166 src = GST_FDSRC (object);
169 case ARG_BYTESPERREAD:
170 g_value_set_int (value, src->bytes_per_read);
173 g_value_set_int64 (value, src->curoffset);
176 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
182 gst_fdsrc_get(GstPad *pad)
188 g_return_val_if_fail (pad != NULL, NULL);
189 src = GST_FDSRC(gst_pad_get_parent (pad));
191 /* create the buffer */
192 /* FIXME: should eventually use a bufferpool for this*/
193 buf = gst_buffer_new ();
194 g_return_val_if_fail (buf, NULL);
196 /* allocate the space for the buffer data */
197 GST_BUFFER_DATA(buf) = g_malloc(src->bytes_per_read);
198 g_return_val_if_fail(GST_BUFFER_DATA(buf) != NULL, NULL);
200 /* read it in from the file */
201 readbytes = read(src->fd,GST_BUFFER_DATA(buf),src->bytes_per_read);
202 /* if nothing was read, we're in eos */
203 if (readbytes == 0) {
204 gst_element_set_eos (GST_ELEMENT (src));
205 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
208 GST_BUFFER_OFFSET(buf) = src->curoffset;
209 GST_BUFFER_SIZE(buf) = readbytes;
210 src->curoffset += readbytes;
212 /* we're done, return the buffer */