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>
36 #define DEFAULT_BLOCKSIZE 4096
38 GST_DEBUG_CATEGORY_STATIC (gst_fdsrc_debug);
39 #define GST_CAT_DEFAULT gst_fdsrc_debug
41 GstElementDetails gst_fdsrc_details = GST_ELEMENT_DETAILS (
44 "Synchronous read from a file",
45 "Erik Walthinsen <omega@cse.ogi.edu>"
49 /* FdSrc signals and args */
61 static void gst_fdsrc_base_init (gpointer g_class);
62 static void gst_fdsrc_class_init (GstFdSrcClass *klass);
63 static void gst_fdsrc_init (GstFdSrc *fdsrc);
65 static void gst_fdsrc_set_property (GObject *object, guint prop_id,
66 const GValue *value, GParamSpec *pspec);
67 static void gst_fdsrc_get_property (GObject *object, guint prop_id,
68 GValue *value, GParamSpec *pspec);
70 static GstData * gst_fdsrc_get (GstPad *pad);
73 static GstElementClass *parent_class = NULL;
74 /*static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };*/
77 gst_fdsrc_get_type (void)
79 static GType fdsrc_type = 0;
82 static const GTypeInfo fdsrc_info = {
83 sizeof(GstFdSrcClass),
86 (GClassInitFunc)gst_fdsrc_class_init,
91 (GInstanceInitFunc)gst_fdsrc_init,
93 fdsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFdSrc", &fdsrc_info, 0);
95 GST_DEBUG_CATEGORY_INIT (gst_fdsrc_debug, "fdsrc", 0, "fdsrc element");
101 gst_fdsrc_base_init (gpointer g_class)
103 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
105 gst_element_class_set_details (gstelement_class, &gst_fdsrc_details);
108 gst_fdsrc_class_init (GstFdSrcClass *klass)
110 GObjectClass *gobject_class;
112 gobject_class = G_OBJECT_CLASS (klass);
114 parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
116 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
117 g_param_spec_int ("fd", "fd", "An open file descriptor to read from",
118 0, G_MAXINT, 0, G_PARAM_READWRITE));
119 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
120 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
121 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
123 gobject_class->set_property = gst_fdsrc_set_property;
124 gobject_class->get_property = gst_fdsrc_get_property;
127 static void gst_fdsrc_init(GstFdSrc *fdsrc) {
128 fdsrc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
130 gst_pad_set_get_function (fdsrc->srcpad, gst_fdsrc_get);
131 gst_element_add_pad (GST_ELEMENT (fdsrc), fdsrc->srcpad);
134 fdsrc->curoffset = 0;
135 fdsrc->blocksize = DEFAULT_BLOCKSIZE;
141 gst_fdsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
145 /* it's not null if we got it, but it might not be ours */
146 g_return_if_fail (GST_IS_FDSRC (object));
148 src = GST_FDSRC (object);
152 src->fd = g_value_get_int (value);
155 src->blocksize = g_value_get_ulong (value);
163 gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
167 /* it's not null if we got it, but it might not be ours */
168 g_return_if_fail (GST_IS_FDSRC (object));
170 src = GST_FDSRC (object);
174 g_value_set_ulong (value, src->blocksize);
177 g_value_set_int (value, src->fd);
180 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
186 gst_fdsrc_get(GstPad *pad)
192 src = GST_FDSRC (gst_pad_get_parent (pad));
194 /* create the buffer */
195 buf = gst_buffer_new_and_alloc (src->blocksize);
197 /* read it in from the file */
198 readbytes = read (src->fd, GST_BUFFER_DATA (buf), src->blocksize);
200 /* if nothing was read, we're in eos */
201 if (readbytes == 0) {
202 gst_element_set_eos (GST_ELEMENT (src));
203 return GST_DATA (gst_event_new (GST_EVENT_EOS));
206 if (readbytes == -1) {
207 g_error ("Error reading from file descriptor. Ending stream.\n");
208 gst_element_set_eos (GST_ELEMENT (src));
209 return GST_DATA (gst_event_new (GST_EVENT_EOS));
212 GST_BUFFER_OFFSET (buf) = src->curoffset;
213 GST_BUFFER_SIZE (buf) = readbytes;
214 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
215 src->curoffset += readbytes;
217 /* we're done, return the buffer */
218 return GST_DATA (buf);