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.
24 * SECTION:element-fdsink
25 * @see_also: #GstFdSrc
27 * Write data to a unix file descriptor.
29 * This element will synchronize on the clock before writing the data on the
30 * socket. For file descriptors where this does not make sense (files, ...) the
31 * #GstBaseSink:sync property can be used to disable synchronisation.
33 * Last reviewed on 2006-04-28 (0.10.6)
40 #include "../../gst/gst-i18n-lib.h"
42 #include <sys/types.h>
45 #include <io.h> /* lseek, open, close, read */
47 #define lseek _lseeki64
53 #ifdef HAVE_SYS_SOCKET_H
54 #include <sys/socket.h>
65 #define S_ISREG(m) (((m)&S_IFREG)==S_IFREG)
70 #include "gstfdsink.h"
72 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
77 GST_DEBUG_CATEGORY_STATIC (gst_fd_sink__debug);
78 #define GST_CAT_DEFAULT gst_fd_sink__debug
81 /* FdSink signals and args */
94 static void gst_fd_sink_uri_handler_init (gpointer g_iface,
98 _do_init (GType gst_fd_sink_type)
100 static const GInterfaceInfo urihandler_info = {
101 gst_fd_sink_uri_handler_init,
106 g_type_add_interface_static (gst_fd_sink_type, GST_TYPE_URI_HANDLER,
109 GST_DEBUG_CATEGORY_INIT (gst_fd_sink__debug, "fdsink", 0, "fdsink element");
112 GST_BOILERPLATE_FULL (GstFdSink, gst_fd_sink, GstBaseSink, GST_TYPE_BASE_SINK,
115 static void gst_fd_sink_set_property (GObject * object, guint prop_id,
116 const GValue * value, GParamSpec * pspec);
117 static void gst_fd_sink_get_property (GObject * object, guint prop_id,
118 GValue * value, GParamSpec * pspec);
119 static void gst_fd_sink_dispose (GObject * obj);
121 static gboolean gst_fd_sink_query (GstPad * pad, GstQuery * query);
122 static GstFlowReturn gst_fd_sink_render (GstBaseSink * sink,
124 static gboolean gst_fd_sink_start (GstBaseSink * basesink);
125 static gboolean gst_fd_sink_stop (GstBaseSink * basesink);
126 static gboolean gst_fd_sink_unlock (GstBaseSink * basesink);
127 static gboolean gst_fd_sink_unlock_stop (GstBaseSink * basesink);
128 static gboolean gst_fd_sink_event (GstBaseSink * sink, GstEvent * event);
130 static gboolean gst_fd_sink_do_seek (GstFdSink * fdsink, guint64 new_offset);
133 gst_fd_sink_base_init (gpointer g_class)
135 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
137 gst_element_class_set_details_simple (gstelement_class,
138 "Filedescriptor Sink",
140 "Write data to a file descriptor", "Erik Walthinsen <omega@cse.ogi.edu>");
141 gst_element_class_add_pad_template (gstelement_class,
142 gst_static_pad_template_get (&sinktemplate));
146 gst_fd_sink_class_init (GstFdSinkClass * klass)
148 GObjectClass *gobject_class;
149 GstBaseSinkClass *gstbasesink_class;
151 gobject_class = G_OBJECT_CLASS (klass);
152 gstbasesink_class = GST_BASE_SINK_CLASS (klass);
154 gobject_class->set_property = gst_fd_sink_set_property;
155 gobject_class->get_property = gst_fd_sink_get_property;
156 gobject_class->dispose = gst_fd_sink_dispose;
158 gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_fd_sink_render);
159 gstbasesink_class->start = GST_DEBUG_FUNCPTR (gst_fd_sink_start);
160 gstbasesink_class->stop = GST_DEBUG_FUNCPTR (gst_fd_sink_stop);
161 gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_fd_sink_unlock);
162 gstbasesink_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_fd_sink_unlock_stop);
163 gstbasesink_class->event = GST_DEBUG_FUNCPTR (gst_fd_sink_event);
165 g_object_class_install_property (gobject_class, ARG_FD,
166 g_param_spec_int ("fd", "fd", "An open file descriptor to write to",
167 0, G_MAXINT, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
171 gst_fd_sink_init (GstFdSink * fdsink, GstFdSinkClass * klass)
175 pad = GST_BASE_SINK_PAD (fdsink);
176 gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_fd_sink_query));
179 fdsink->uri = g_strdup_printf ("fd://%d", fdsink->fd);
180 fdsink->bytes_written = 0;
181 fdsink->current_pos = 0;
183 gst_base_sink_set_sync (GST_BASE_SINK (fdsink), FALSE);
187 gst_fd_sink_dispose (GObject * obj)
189 GstFdSink *fdsink = GST_FD_SINK (obj);
191 g_free (fdsink->uri);
194 G_OBJECT_CLASS (parent_class)->dispose (obj);
198 gst_fd_sink_query (GstPad * pad, GstQuery * query)
203 fdsink = GST_FD_SINK (GST_PAD_PARENT (pad));
205 switch (GST_QUERY_TYPE (query)) {
206 case GST_QUERY_POSITION:
207 gst_query_parse_position (query, &format, NULL);
209 case GST_FORMAT_DEFAULT:
210 case GST_FORMAT_BYTES:
211 gst_query_set_position (query, GST_FORMAT_BYTES, fdsink->current_pos);
217 case GST_QUERY_FORMATS:
218 gst_query_set_formats (query, 2, GST_FORMAT_DEFAULT, GST_FORMAT_BYTES);
222 gst_query_set_uri (query, fdsink->uri);
226 return gst_pad_query_default (pad, query);
231 gst_fd_sink_render (GstBaseSink * sink, GstBuffer * buffer)
242 fdsink = GST_FD_SINK (sink);
244 g_return_val_if_fail (fdsink->fd >= 0, GST_FLOW_ERROR);
246 data = GST_BUFFER_DATA (buffer);
247 size = GST_BUFFER_SIZE (buffer);
252 GST_DEBUG_OBJECT (fdsink, "going into select, have %d bytes to write",
254 retval = gst_poll_wait (fdsink->fdset, GST_CLOCK_TIME_NONE);
255 } while (retval == -1 && (errno == EINTR || errno == EAGAIN));
265 GST_DEBUG_OBJECT (fdsink, "writing %d bytes to file descriptor %d", size,
268 written = write (fdsink->fd, data, size);
270 /* check for errors */
271 if (G_UNLIKELY (written < 0)) {
272 /* try to write again on non-fatal errors */
273 if (errno == EAGAIN || errno == EINTR)
276 /* else go to our error handler */
280 /* all is fine when we get here */
283 fdsink->bytes_written += written;
284 fdsink->current_pos += written;
286 GST_DEBUG_OBJECT (fdsink, "wrote %d bytes, %d left", written, size);
288 /* short write, select and try to write the remainder */
289 if (G_UNLIKELY (size > 0))
297 GST_ELEMENT_ERROR (fdsink, RESOURCE, READ, (NULL),
298 ("select on file descriptor: %s.", g_strerror (errno)));
299 GST_DEBUG_OBJECT (fdsink, "Error during select");
300 return GST_FLOW_ERROR;
304 GST_DEBUG_OBJECT (fdsink, "Select stopped");
305 return GST_FLOW_WRONG_STATE;
313 GST_ELEMENT_ERROR (fdsink, RESOURCE, NO_SPACE_LEFT, (NULL), (NULL));
316 GST_ELEMENT_ERROR (fdsink, RESOURCE, WRITE, (NULL),
317 ("Error while writing to file descriptor %d: %s",
318 fdsink->fd, g_strerror (errno)));
321 return GST_FLOW_ERROR;
326 gst_fd_sink_check_fd (GstFdSink * fdsink, int fd)
328 struct stat stat_results;
331 /* see that it is a valid file descriptor */
332 if (fstat (fd, &stat_results) < 0)
335 if (!S_ISREG (stat_results.st_mode))
338 /* see if it is a seekable stream */
339 result = lseek (fd, 0, SEEK_CUR);
350 GST_DEBUG_OBJECT (fdsink, "File descriptor %d is seekable", fd);
356 GST_ELEMENT_ERROR (fdsink, RESOURCE, WRITE, (NULL),
357 ("File descriptor %d is not valid: %s", fd, g_strerror (errno)));
362 GST_DEBUG_OBJECT (fdsink, "File descriptor %d is a pipe", fd);
368 gst_fd_sink_start (GstBaseSink * basesink)
371 GstPollFD fd = GST_POLL_FD_INIT;
373 fdsink = GST_FD_SINK (basesink);
374 if (!gst_fd_sink_check_fd (fdsink, fdsink->fd))
377 if ((fdsink->fdset = gst_poll_new (TRUE)) == NULL)
381 gst_poll_add_fd (fdsink->fdset, &fd);
382 gst_poll_fd_ctl_write (fdsink->fdset, &fd, TRUE);
384 fdsink->bytes_written = 0;
385 fdsink->current_pos = 0;
392 GST_ELEMENT_ERROR (fdsink, RESOURCE, OPEN_READ_WRITE, (NULL),
399 gst_fd_sink_stop (GstBaseSink * basesink)
401 GstFdSink *fdsink = GST_FD_SINK (basesink);
404 gst_poll_free (fdsink->fdset);
405 fdsink->fdset = NULL;
412 gst_fd_sink_unlock (GstBaseSink * basesink)
414 GstFdSink *fdsink = GST_FD_SINK (basesink);
416 GST_LOG_OBJECT (fdsink, "Flushing");
417 GST_OBJECT_LOCK (fdsink);
418 gst_poll_set_flushing (fdsink->fdset, TRUE);
419 GST_OBJECT_UNLOCK (fdsink);
425 gst_fd_sink_unlock_stop (GstBaseSink * basesink)
427 GstFdSink *fdsink = GST_FD_SINK (basesink);
429 GST_LOG_OBJECT (fdsink, "No longer flushing");
430 GST_OBJECT_LOCK (fdsink);
431 gst_poll_set_flushing (fdsink->fdset, FALSE);
432 GST_OBJECT_UNLOCK (fdsink);
438 gst_fd_sink_update_fd (GstFdSink * fdsink, int new_fd)
443 if (!gst_fd_sink_check_fd (fdsink, new_fd))
447 GST_OBJECT_LOCK (fdsink);
449 GstPollFD fd = GST_POLL_FD_INIT;
452 gst_poll_remove_fd (fdsink->fdset, &fd);
455 gst_poll_add_fd (fdsink->fdset, &fd);
456 gst_poll_fd_ctl_write (fdsink->fdset, &fd, TRUE);
459 g_free (fdsink->uri);
460 fdsink->uri = g_strdup_printf ("fd://%d", fdsink->fd);
462 GST_OBJECT_UNLOCK (fdsink);
473 gst_fd_sink_set_property (GObject * object, guint prop_id,
474 const GValue * value, GParamSpec * pspec)
478 fdsink = GST_FD_SINK (object);
484 fd = g_value_get_int (value);
485 gst_fd_sink_update_fd (fdsink, fd);
489 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
495 gst_fd_sink_get_property (GObject * object, guint prop_id, GValue * value,
500 fdsink = GST_FD_SINK (object);
504 g_value_set_int (value, fdsink->fd);
507 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
513 gst_fd_sink_do_seek (GstFdSink * fdsink, guint64 new_offset)
517 result = lseek (fdsink->fd, new_offset, SEEK_SET);
522 fdsink->current_pos = new_offset;
524 GST_DEBUG_OBJECT (fdsink, "File descriptor %d to seek to position "
525 "%" G_GUINT64_FORMAT, fdsink->fd, fdsink->current_pos);
532 GST_DEBUG_OBJECT (fdsink, "File descriptor %d failed to seek to position "
533 "%" G_GUINT64_FORMAT, fdsink->fd, new_offset);
539 gst_fd_sink_event (GstBaseSink * sink, GstEvent * event)
544 fdsink = GST_FD_SINK (sink);
546 type = GST_EVENT_TYPE (event);
549 case GST_EVENT_NEWSEGMENT:
551 gint64 start, stop, pos;
553 gst_event_parse_new_segment (event, NULL, NULL, &format, &start,
556 if (format == GST_FORMAT_BYTES) {
557 /* only try to seek and fail when we are going to a different
559 if (fdsink->current_pos != start) {
560 /* FIXME, the seek should be performed on the pos field, start/stop are
561 * just boundaries for valid bytes offsets. We should also fill the file
562 * with zeroes if the new position extends the current EOF (sparse streams
563 * and segment accumulation). */
564 if (!gst_fd_sink_do_seek (fdsink, (guint64) start))
568 GST_DEBUG_OBJECT (fdsink,
569 "Ignored NEWSEGMENT event of format %u (%s)", (guint) format,
570 gst_format_get_name (format));
582 GST_ELEMENT_ERROR (fdsink, RESOURCE, SEEK, (NULL),
583 ("Error while seeking on file descriptor %d: %s",
584 fdsink->fd, g_strerror (errno)));
590 /*** GSTURIHANDLER INTERFACE *************************************************/
593 gst_fd_sink_uri_get_type (void)
599 gst_fd_sink_uri_get_protocols (void)
601 static gchar *protocols[] = { (char *) "fd", NULL };
607 gst_fd_sink_uri_get_uri (GstURIHandler * handler)
609 GstFdSink *sink = GST_FD_SINK (handler);
615 gst_fd_sink_uri_set_uri (GstURIHandler * handler, const gchar * uri)
618 GstFdSink *sink = GST_FD_SINK (handler);
621 protocol = gst_uri_get_protocol (uri);
622 if (strcmp (protocol, "fd") != 0) {
628 if (sscanf (uri, "fd://%d", &fd) != 1)
631 return gst_fd_sink_update_fd (sink, fd);
635 gst_fd_sink_uri_handler_init (gpointer g_iface, gpointer iface_data)
637 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
639 iface->get_type = gst_fd_sink_uri_get_type;
640 iface->get_protocols = gst_fd_sink_uri_get_protocols;
641 iface->get_uri = gst_fd_sink_uri_get_uri;
642 iface->set_uri = gst_fd_sink_uri_set_uri;