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>
37 #define DEFAULT_BLOCKSIZE 4096
39 GST_DEBUG_CATEGORY_STATIC (gst_fdsrc_debug);
40 #define GST_CAT_DEFAULT gst_fdsrc_debug
42 GstElementDetails gst_fdsrc_details = GST_ELEMENT_DETAILS (
45 "Synchronous read from a file",
46 "Erik Walthinsen <omega@cse.ogi.edu>"
50 /* FdSrc signals and args */
63 static guint gst_fdsrc_signals[LAST_SIGNAL] = { 0 };
65 #define _do_init(bla) \
66 GST_DEBUG_CATEGORY_INIT (gst_fdsrc_debug, "fdsrc", 0, "fdsrc element");
68 GST_BOILERPLATE_FULL (GstFdSrc, gst_fdsrc, GstElement, GST_TYPE_ELEMENT, _do_init);
70 static void gst_fdsrc_set_property (GObject *object, guint prop_id,
71 const GValue *value, GParamSpec *pspec);
72 static void gst_fdsrc_get_property (GObject *object, guint prop_id,
73 GValue *value, GParamSpec *pspec);
75 static GstData * gst_fdsrc_get (GstPad *pad);
79 gst_fdsrc_base_init (gpointer g_class)
81 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
83 gst_element_class_set_details (gstelement_class, &gst_fdsrc_details);
86 gst_fdsrc_class_init (GstFdSrcClass *klass)
88 GObjectClass *gobject_class;
90 gobject_class = G_OBJECT_CLASS (klass);
92 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
93 g_param_spec_int ("fd", "fd", "An open file descriptor to read from",
94 0, G_MAXINT, 0, G_PARAM_READWRITE));
95 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
96 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
97 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
98 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TIMEOUT,
99 g_param_spec_uint64 ("timeout", "Timeout", "Read timeout in nanoseconds",
100 0, G_MAXUINT64, 0, G_PARAM_READWRITE));
102 gst_fdsrc_signals[SIGNAL_TIMEOUT] =
103 g_signal_new ("timeout", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
104 G_STRUCT_OFFSET (GstFdSrcClass, timeout), NULL, NULL,
105 g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
107 gobject_class->set_property = gst_fdsrc_set_property;
108 gobject_class->get_property = gst_fdsrc_get_property;
111 static void gst_fdsrc_init(GstFdSrc *fdsrc) {
112 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->blocksize = DEFAULT_BLOCKSIZE;
126 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 src->fd = g_value_get_int (value);
140 src->blocksize = g_value_get_ulong (value);
143 src->timeout = g_value_get_uint64 (value);
151 gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
155 /* it's not null if we got it, but it might not be ours */
156 g_return_if_fail (GST_IS_FDSRC (object));
158 src = GST_FDSRC (object);
162 g_value_set_ulong (value, src->blocksize);
165 g_value_set_int (value, src->fd);
168 g_value_set_uint64 (value, src->timeout);
171 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
177 gst_fdsrc_get(GstPad *pad)
183 struct timeval t, *tp = &t;
186 src = GST_FDSRC (gst_pad_get_parent (pad));
188 /* create the buffer */
189 buf = gst_buffer_new_and_alloc (src->blocksize);
192 FD_SET (src->fd, &readfds);
194 if (src->timeout != 0)
196 tp->tv_sec = src->timeout / 1000000000;
197 tp->tv_usec = src->timeout - t.tv_sec * 1000000000;
204 retval = select (1, &readfds, NULL, NULL, tp);
205 } while (retval == -1 && errno == EINTR); /* retry if interrupted */
209 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), ("select on file descriptor: %s.", g_strerror(errno)));
210 gst_element_set_eos (GST_ELEMENT (src));
211 return GST_DATA (gst_event_new (GST_EVENT_EOS));
213 else if (retval == 0)
215 g_signal_emit (G_OBJECT (src), gst_fdsrc_signals[SIGNAL_TIMEOUT], 0);
216 gst_element_set_eos (GST_ELEMENT (src));
217 return GST_DATA(gst_event_new (GST_EVENT_EOS));
222 readbytes = read (src->fd, GST_BUFFER_DATA (buf), src->blocksize);
223 } while (readbytes == -1 && errno == EINTR); /* retry if interrupted */
227 GST_BUFFER_OFFSET (buf) = src->curoffset;
228 GST_BUFFER_SIZE (buf) = readbytes;
229 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
230 src->curoffset += readbytes;
232 /* we're done, return the buffer */
233 return GST_DATA (buf);
235 else if (readbytes == 0)
237 gst_element_set_eos (GST_ELEMENT (src));
238 return GST_DATA (gst_event_new (GST_EVENT_EOS));
242 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), ("read on file descriptor: %s.", g_strerror(errno)));
243 gst_element_set_eos (GST_ELEMENT (src));
244 return GST_DATA (gst_event_new (GST_EVENT_EOS));