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 (gst_fdsrc_debug);
39 #define GST_CAT_DEFAULT gst_fdsrc_debug
41 GstElementDetails gst_fdsrc_details =
46 "Synchronous read from a file",
48 "Erik Walthinsen <omega@cse.ogi.edu>",
53 /* FdSrc signals and args */
66 static void gst_fdsrc_class_init (GstFdSrcClass *klass);
67 static void gst_fdsrc_init (GstFdSrc *fdsrc);
69 static void gst_fdsrc_set_property (GObject *object, guint prop_id,
70 const GValue *value, GParamSpec *pspec);
71 static void gst_fdsrc_get_property (GObject *object, guint prop_id,
72 GValue *value, GParamSpec *pspec);
74 static GstBuffer * gst_fdsrc_get (GstPad *pad);
77 static GstElementClass *parent_class = NULL;
78 /*static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };*/
81 gst_fdsrc_get_type (void)
83 static GType fdsrc_type = 0;
86 static const GTypeInfo fdsrc_info = {
87 sizeof(GstFdSrcClass),
90 (GClassInitFunc)gst_fdsrc_class_init,
95 (GInstanceInitFunc)gst_fdsrc_init,
97 fdsrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFdSrc", &fdsrc_info, 0);
103 gst_fdsrc_class_init (GstFdSrcClass *klass)
105 GObjectClass *gobject_class;
107 gobject_class = (GObjectClass*)klass;
109 parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
111 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
112 g_param_spec_int ("fd", "fd", "An open file descriptor to read from",
113 0, G_MAXINT, 0, G_PARAM_READWRITE));
114 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
115 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
116 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
118 gobject_class->set_property = gst_fdsrc_set_property;
119 gobject_class->get_property = gst_fdsrc_get_property;
122 static void gst_fdsrc_init(GstFdSrc *fdsrc) {
123 fdsrc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
125 gst_pad_set_get_function (fdsrc->srcpad, gst_fdsrc_get);
126 gst_element_add_pad (GST_ELEMENT (fdsrc), fdsrc->srcpad);
129 fdsrc->curoffset = 0;
130 fdsrc->blocksize = DEFAULT_BLOCKSIZE;
136 gst_fdsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
140 /* it's not null if we got it, but it might not be ours */
141 g_return_if_fail (GST_IS_FDSRC (object));
143 src = GST_FDSRC (object);
147 src->fd = g_value_get_int (value);
150 src->blocksize = g_value_get_ulong (value);
158 gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
162 /* it's not null if we got it, but it might not be ours */
163 g_return_if_fail (GST_IS_FDSRC (object));
165 src = GST_FDSRC (object);
169 g_value_set_ulong (value, src->blocksize);
172 g_value_set_int (value, src->fd);
175 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
181 gst_fdsrc_get(GstPad *pad)
187 src = GST_FDSRC (gst_pad_get_parent (pad));
189 /* create the buffer */
190 buf = gst_buffer_new_and_alloc (src->blocksize);
192 /* read it in from the file */
193 readbytes = read (src->fd, GST_BUFFER_DATA (buf), src->blocksize);
195 /* if nothing was read, we're in eos */
196 if (readbytes == 0) {
197 gst_element_set_eos (GST_ELEMENT (src));
198 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
201 if (readbytes == -1) {
202 g_error ("Error reading from file descriptor. Ending stream.\n");
203 gst_element_set_eos (GST_ELEMENT (src));
204 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
207 GST_BUFFER_OFFSET (buf) = src->curoffset;
208 GST_BUFFER_SIZE (buf) = readbytes;
209 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
210 src->curoffset += readbytes;
212 /* we're done, return the buffer */