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);
117 gst_pad_set_get_function(fdsrc->srcpad,gst_fdsrc_get);
118 gst_element_add_pad(GST_ELEMENT(fdsrc),fdsrc->srcpad);
121 fdsrc->curoffset = 0;
122 fdsrc->blocksize = DEFAULT_BLOCKSIZE;
128 gst_fdsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
132 /* it's not null if we got it, but it might not be ours */
133 g_return_if_fail (GST_IS_FDSRC (object));
135 src = GST_FDSRC (object);
139 src->fd = g_value_get_int (value);
142 src->blocksize = g_value_get_ulong (value);
150 gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
154 /* it's not null if we got it, but it might not be ours */
155 g_return_if_fail (GST_IS_FDSRC (object));
157 src = GST_FDSRC (object);
161 g_value_set_ulong (value, src->blocksize);
164 g_value_set_int (value, src->fd);
167 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
173 gst_fdsrc_get(GstPad *pad)
179 g_return_val_if_fail (pad != NULL, NULL);
180 src = GST_FDSRC(gst_pad_get_parent (pad));
182 /* create the buffer */
183 /* FIXME: should eventually use a bufferpool for this*/
184 buf = gst_buffer_new ();
185 g_return_val_if_fail (buf, NULL);
187 /* allocate the space for the buffer data */
188 GST_BUFFER_DATA(buf) = g_malloc(src->blocksize);
189 g_return_val_if_fail(GST_BUFFER_DATA(buf) != NULL, NULL);
191 /* read it in from the file */
192 readbytes = read(src->fd,GST_BUFFER_DATA(buf),src->blocksize);
193 /* if nothing was read, we're in eos */
194 if (readbytes == 0) {
195 gst_element_set_eos (GST_ELEMENT (src));
196 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
199 GST_BUFFER_OFFSET(buf) = src->curoffset;
200 GST_BUFFER_SIZE(buf) = readbytes;
201 src->curoffset += readbytes;
203 /* we're done, return the buffer */