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 = {
37 "Synchronous read from a file",
39 "Erik Walthinsen <omega@cse.ogi.edu>",
44 /* 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), NULL,
82 (GClassInitFunc)gst_fdsrc_class_init,
87 (GInstanceInitFunc)gst_fdsrc_init,
89 fdsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFdSrc", &fdsrc_info, 0);
95 gst_fdsrc_class_init (GstFdSrcClass *klass)
97 GObjectClass *gobject_class;
99 gobject_class = (GObjectClass*)klass;
101 parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
103 gst_element_class_install_std_props (
104 GST_ELEMENT_CLASS (klass),
105 "location", ARG_LOCATION, G_PARAM_WRITABLE,
106 "bytesperread", ARG_BYTESPERREAD, G_PARAM_READWRITE,
107 "offset", ARG_OFFSET, G_PARAM_READABLE,
110 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
111 g_param_spec_int ("fd", "fd", "An open file descriptor to read from",
112 0, G_MAXINT, 0, G_PARAM_READWRITE));
114 gobject_class->set_property = gst_fdsrc_set_property;
115 gobject_class->get_property = gst_fdsrc_get_property;
118 static void gst_fdsrc_init(GstFdSrc *fdsrc) {
119 fdsrc->srcpad = gst_pad_new("src",GST_PAD_SRC);
120 gst_pad_set_get_function(fdsrc->srcpad,gst_fdsrc_get);
121 gst_element_add_pad(GST_ELEMENT(fdsrc),fdsrc->srcpad);
124 fdsrc->curoffset = 0;
125 fdsrc->bytes_per_read = 4096;
131 gst_fdsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
136 /* it's not null if we got it, but it might not be ours */
137 g_return_if_fail (GST_IS_FDSRC (object));
139 src = GST_FDSRC (object);
143 /* the element must not be playing in order to do this */
144 g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
146 /* if we get a NULL, consider it to be a fd of 0 */
147 if (g_value_get_string (value) == NULL) {
148 gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
150 /* otherwise set the new filename */
152 if (sscanf (g_value_get_string (value), "%d", &fd))
157 src->fd = g_value_get_int (value);
159 case ARG_BYTESPERREAD:
160 src->bytes_per_read = g_value_get_int (value);
168 gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
172 /* it's not null if we got it, but it might not be ours */
173 g_return_if_fail (GST_IS_FDSRC (object));
175 src = GST_FDSRC (object);
178 case ARG_BYTESPERREAD:
179 g_value_set_int (value, src->bytes_per_read);
182 g_value_set_int64 (value, src->curoffset);
185 g_value_set_int (value, src->fd);
188 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
194 gst_fdsrc_get(GstPad *pad)
200 g_return_val_if_fail (pad != NULL, NULL);
201 src = GST_FDSRC(gst_pad_get_parent (pad));
203 /* create the buffer */
204 /* FIXME: should eventually use a bufferpool for this*/
205 buf = gst_buffer_new ();
206 g_return_val_if_fail (buf, NULL);
208 /* allocate the space for the buffer data */
209 GST_BUFFER_DATA(buf) = g_malloc(src->bytes_per_read);
210 g_return_val_if_fail(GST_BUFFER_DATA(buf) != NULL, NULL);
212 /* read it in from the file */
213 readbytes = read(src->fd,GST_BUFFER_DATA(buf),src->bytes_per_read);
214 /* if nothing was read, we're in eos */
215 if (readbytes == 0) {
216 gst_element_set_eos (GST_ELEMENT (src));
217 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
220 GST_BUFFER_OFFSET(buf) = src->curoffset;
221 GST_BUFFER_SIZE(buf) = readbytes;
222 src->curoffset += readbytes;
224 /* we're done, return the buffer */