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., 51 Franklin St, Fifth Floor,
20 * Boston, MA 02110-1301, 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.
38 #include "../../gst/gst-i18n-lib.h"
40 #include <sys/types.h>
43 #ifdef HAVE_SYS_SOCKET_H
44 #include <sys/socket.h>
55 #define S_ISREG(m) (((m)&S_IFREG)==S_IFREG)
60 #include "gstfdsink.h"
63 #include <io.h> /* lseek, open, close, read */
65 #define lseek _lseeki64
70 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
75 GST_DEBUG_CATEGORY_STATIC (gst_fd_sink__debug);
76 #define GST_CAT_DEFAULT gst_fd_sink__debug
79 /* FdSink signals and args */
92 static void gst_fd_sink_uri_handler_init (gpointer g_iface,
96 G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_fd_sink_uri_handler_init); \
97 GST_DEBUG_CATEGORY_INIT (gst_fd_sink__debug, "fdsink", 0, "fdsink element");
98 #define gst_fd_sink_parent_class parent_class
99 G_DEFINE_TYPE_WITH_CODE (GstFdSink, gst_fd_sink, GST_TYPE_BASE_SINK, _do_init);
101 static void gst_fd_sink_set_property (GObject * object, guint prop_id,
102 const GValue * value, GParamSpec * pspec);
103 static void gst_fd_sink_get_property (GObject * object, guint prop_id,
104 GValue * value, GParamSpec * pspec);
105 static void gst_fd_sink_dispose (GObject * obj);
107 static gboolean gst_fd_sink_query (GstBaseSink * bsink, GstQuery * query);
108 static GstFlowReturn gst_fd_sink_render (GstBaseSink * sink,
110 static gboolean gst_fd_sink_start (GstBaseSink * basesink);
111 static gboolean gst_fd_sink_stop (GstBaseSink * basesink);
112 static gboolean gst_fd_sink_unlock (GstBaseSink * basesink);
113 static gboolean gst_fd_sink_unlock_stop (GstBaseSink * basesink);
114 static gboolean gst_fd_sink_event (GstBaseSink * sink, GstEvent * event);
116 static gboolean gst_fd_sink_do_seek (GstFdSink * fdsink, guint64 new_offset);
119 gst_fd_sink_class_init (GstFdSinkClass * klass)
121 GObjectClass *gobject_class;
122 GstElementClass *gstelement_class;
123 GstBaseSinkClass *gstbasesink_class;
125 gobject_class = G_OBJECT_CLASS (klass);
126 gstelement_class = GST_ELEMENT_CLASS (klass);
127 gstbasesink_class = GST_BASE_SINK_CLASS (klass);
129 gobject_class->set_property = gst_fd_sink_set_property;
130 gobject_class->get_property = gst_fd_sink_get_property;
131 gobject_class->dispose = gst_fd_sink_dispose;
133 gst_element_class_set_static_metadata (gstelement_class,
134 "Filedescriptor Sink",
136 "Write data to a file descriptor", "Erik Walthinsen <omega@cse.ogi.edu>");
137 gst_element_class_add_pad_template (gstelement_class,
138 gst_static_pad_template_get (&sinktemplate));
140 gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_fd_sink_render);
141 gstbasesink_class->start = GST_DEBUG_FUNCPTR (gst_fd_sink_start);
142 gstbasesink_class->stop = GST_DEBUG_FUNCPTR (gst_fd_sink_stop);
143 gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_fd_sink_unlock);
144 gstbasesink_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_fd_sink_unlock_stop);
145 gstbasesink_class->event = GST_DEBUG_FUNCPTR (gst_fd_sink_event);
146 gstbasesink_class->query = GST_DEBUG_FUNCPTR (gst_fd_sink_query);
148 g_object_class_install_property (gobject_class, ARG_FD,
149 g_param_spec_int ("fd", "fd", "An open file descriptor to write to",
150 0, G_MAXINT, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
154 gst_fd_sink_init (GstFdSink * fdsink)
157 fdsink->uri = g_strdup_printf ("fd://%d", fdsink->fd);
158 fdsink->bytes_written = 0;
159 fdsink->current_pos = 0;
161 gst_base_sink_set_sync (GST_BASE_SINK (fdsink), FALSE);
165 gst_fd_sink_dispose (GObject * obj)
167 GstFdSink *fdsink = GST_FD_SINK (obj);
169 g_free (fdsink->uri);
172 G_OBJECT_CLASS (parent_class)->dispose (obj);
176 gst_fd_sink_query (GstBaseSink * bsink, GstQuery * query)
178 gboolean res = FALSE;
181 fdsink = GST_FD_SINK (bsink);
183 switch (GST_QUERY_TYPE (query)) {
184 case GST_QUERY_POSITION:
188 gst_query_parse_position (query, &format, NULL);
191 case GST_FORMAT_DEFAULT:
192 case GST_FORMAT_BYTES:
193 gst_query_set_position (query, GST_FORMAT_BYTES, fdsink->current_pos);
201 case GST_QUERY_FORMATS:
202 gst_query_set_formats (query, 2, GST_FORMAT_DEFAULT, GST_FORMAT_BYTES);
206 gst_query_set_uri (query, fdsink->uri);
209 case GST_QUERY_SEEKING:{
212 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
213 if (format == GST_FORMAT_BYTES || format == GST_FORMAT_DEFAULT) {
214 gst_query_set_seeking (query, GST_FORMAT_BYTES, fdsink->seekable, 0,
217 gst_query_set_seeking (query, format, FALSE, 0, -1);
223 res = GST_BASE_SINK_CLASS (parent_class)->query (bsink, query);
231 gst_fd_sink_render (GstBaseSink * sink, GstBuffer * buffer)
243 fdsink = GST_FD_SINK (sink);
245 g_return_val_if_fail (fdsink->fd >= 0, GST_FLOW_ERROR);
247 gst_buffer_map (buffer, &info, GST_MAP_READ);
255 GST_DEBUG_OBJECT (fdsink, "going into select, have %" G_GSIZE_FORMAT
256 " bytes to write", info.size);
257 retval = gst_poll_wait (fdsink->fdset, GST_CLOCK_TIME_NONE);
258 } while (retval == -1 && (errno == EINTR || errno == EAGAIN));
268 GST_DEBUG_OBJECT (fdsink, "writing %" G_GSIZE_FORMAT " bytes to"
269 " file descriptor %d", info.size, fdsink->fd);
271 written = write (fdsink->fd, ptr, left);
273 /* check for errors */
274 if (G_UNLIKELY (written < 0)) {
275 /* try to write again on non-fatal errors */
276 if (errno == EAGAIN || errno == EINTR)
279 /* else go to our error handler */
283 /* all is fine when we get here */
286 fdsink->bytes_written += written;
287 fdsink->current_pos += written;
289 GST_DEBUG_OBJECT (fdsink, "wrote %d bytes, %" G_GSIZE_FORMAT " left", written,
292 /* short write, select and try to write the remainder */
293 if (G_UNLIKELY (left > 0))
296 gst_buffer_unmap (buffer, &info);
303 GST_ELEMENT_ERROR (fdsink, RESOURCE, READ, (NULL),
304 ("select on file descriptor: %s.", g_strerror (errno)));
305 GST_DEBUG_OBJECT (fdsink, "Error during select");
306 gst_buffer_unmap (buffer, &info);
307 return GST_FLOW_ERROR;
311 GST_DEBUG_OBJECT (fdsink, "Select stopped");
312 gst_buffer_unmap (buffer, &info);
313 return GST_FLOW_FLUSHING;
321 GST_ELEMENT_ERROR (fdsink, RESOURCE, NO_SPACE_LEFT, (NULL), (NULL));
324 GST_ELEMENT_ERROR (fdsink, RESOURCE, WRITE, (NULL),
325 ("Error while writing to file descriptor %d: %s",
326 fdsink->fd, g_strerror (errno)));
329 gst_buffer_unmap (buffer, &info);
330 return GST_FLOW_ERROR;
335 gst_fd_sink_check_fd (GstFdSink * fdsink, int fd, GError ** error)
337 struct stat stat_results;
340 /* see that it is a valid file descriptor */
341 if (fstat (fd, &stat_results) < 0)
344 if (!S_ISREG (stat_results.st_mode))
347 /* see if it is a seekable stream */
348 result = lseek (fd, 0, SEEK_CUR);
359 GST_DEBUG_OBJECT (fdsink, "File descriptor %d is seekable", fd);
365 GST_ELEMENT_ERROR (fdsink, RESOURCE, WRITE, (NULL),
366 ("File descriptor %d is not valid: %s", fd, g_strerror (errno)));
367 g_set_error (error, GST_URI_ERROR, GST_URI_ERROR_BAD_REFERENCE,
368 "File descriptor %d is not valid: %s", fd, g_strerror (errno));
373 GST_DEBUG_OBJECT (fdsink, "File descriptor %d is a pipe", fd);
379 gst_fd_sink_start (GstBaseSink * basesink)
382 GstPollFD fd = GST_POLL_FD_INIT;
384 fdsink = GST_FD_SINK (basesink);
385 if (!gst_fd_sink_check_fd (fdsink, fdsink->fd, NULL))
388 if ((fdsink->fdset = gst_poll_new (TRUE)) == NULL)
392 gst_poll_add_fd (fdsink->fdset, &fd);
393 gst_poll_fd_ctl_write (fdsink->fdset, &fd, TRUE);
395 fdsink->bytes_written = 0;
396 fdsink->current_pos = 0;
398 fdsink->seekable = gst_fd_sink_do_seek (fdsink, 0);
399 GST_INFO_OBJECT (fdsink, "seeking supported: %d", fdsink->seekable);
406 GST_ELEMENT_ERROR (fdsink, RESOURCE, OPEN_READ_WRITE, (NULL),
413 gst_fd_sink_stop (GstBaseSink * basesink)
415 GstFdSink *fdsink = GST_FD_SINK (basesink);
418 gst_poll_free (fdsink->fdset);
419 fdsink->fdset = NULL;
426 gst_fd_sink_unlock (GstBaseSink * basesink)
428 GstFdSink *fdsink = GST_FD_SINK (basesink);
430 GST_LOG_OBJECT (fdsink, "Flushing");
431 GST_OBJECT_LOCK (fdsink);
432 gst_poll_set_flushing (fdsink->fdset, TRUE);
433 GST_OBJECT_UNLOCK (fdsink);
439 gst_fd_sink_unlock_stop (GstBaseSink * basesink)
441 GstFdSink *fdsink = GST_FD_SINK (basesink);
443 GST_LOG_OBJECT (fdsink, "No longer flushing");
444 GST_OBJECT_LOCK (fdsink);
445 gst_poll_set_flushing (fdsink->fdset, FALSE);
446 GST_OBJECT_UNLOCK (fdsink);
452 gst_fd_sink_update_fd (GstFdSink * fdsink, int new_fd, GError ** error)
455 g_set_error (error, GST_URI_ERROR, GST_URI_ERROR_BAD_REFERENCE,
456 "File descriptor %d is not valid", new_fd);
460 if (!gst_fd_sink_check_fd (fdsink, new_fd, error))
464 GST_OBJECT_LOCK (fdsink);
466 GstPollFD fd = GST_POLL_FD_INIT;
469 gst_poll_remove_fd (fdsink->fdset, &fd);
472 gst_poll_add_fd (fdsink->fdset, &fd);
473 gst_poll_fd_ctl_write (fdsink->fdset, &fd, TRUE);
476 g_free (fdsink->uri);
477 fdsink->uri = g_strdup_printf ("fd://%d", fdsink->fd);
479 GST_OBJECT_UNLOCK (fdsink);
490 gst_fd_sink_set_property (GObject * object, guint prop_id,
491 const GValue * value, GParamSpec * pspec)
495 fdsink = GST_FD_SINK (object);
501 fd = g_value_get_int (value);
502 gst_fd_sink_update_fd (fdsink, fd, NULL);
506 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
512 gst_fd_sink_get_property (GObject * object, guint prop_id, GValue * value,
517 fdsink = GST_FD_SINK (object);
521 g_value_set_int (value, fdsink->fd);
524 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
530 gst_fd_sink_do_seek (GstFdSink * fdsink, guint64 new_offset)
534 result = lseek (fdsink->fd, new_offset, SEEK_SET);
539 fdsink->current_pos = new_offset;
541 GST_DEBUG_OBJECT (fdsink, "File descriptor %d to seek to position "
542 "%" G_GUINT64_FORMAT, fdsink->fd, fdsink->current_pos);
549 GST_DEBUG_OBJECT (fdsink, "File descriptor %d failed to seek to position "
550 "%" G_GUINT64_FORMAT, fdsink->fd, new_offset);
556 gst_fd_sink_event (GstBaseSink * sink, GstEvent * event)
561 fdsink = GST_FD_SINK (sink);
563 type = GST_EVENT_TYPE (event);
566 case GST_EVENT_SEGMENT:
568 const GstSegment *segment;
570 gst_event_parse_segment (event, &segment);
572 if (segment->format == GST_FORMAT_BYTES) {
573 /* only try to seek and fail when we are going to a different
575 if (fdsink->current_pos != segment->start) {
576 /* FIXME, the seek should be performed on the pos field, start/stop are
577 * just boundaries for valid bytes offsets. We should also fill the file
578 * with zeroes if the new position extends the current EOF (sparse streams
579 * and segment accumulation). */
580 if (!gst_fd_sink_do_seek (fdsink, (guint64) segment->start))
584 GST_DEBUG_OBJECT (fdsink,
585 "Ignored SEGMENT event of format %u (%s)", (guint) segment->format,
586 gst_format_get_name (segment->format));
594 return GST_BASE_SINK_CLASS (parent_class)->event (sink, event);
598 GST_ELEMENT_ERROR (fdsink, RESOURCE, SEEK, (NULL),
599 ("Error while seeking on file descriptor %d: %s",
600 fdsink->fd, g_strerror (errno)));
601 gst_event_unref (event);
607 /*** GSTURIHANDLER INTERFACE *************************************************/
610 gst_fd_sink_uri_get_type (GType type)
615 static const gchar *const *
616 gst_fd_sink_uri_get_protocols (GType type)
618 static const gchar *protocols[] = { "fd", NULL };
624 gst_fd_sink_uri_get_uri (GstURIHandler * handler)
626 GstFdSink *sink = GST_FD_SINK (handler);
628 /* FIXME: make thread-safe */
629 return g_strdup (sink->uri);
633 gst_fd_sink_uri_set_uri (GstURIHandler * handler, const gchar * uri,
636 GstFdSink *sink = GST_FD_SINK (handler);
639 if (sscanf (uri, "fd://%d", &fd) != 1) {
640 g_set_error (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
641 "File descriptor URI could not be parsed");
645 return gst_fd_sink_update_fd (sink, fd, error);
649 gst_fd_sink_uri_handler_init (gpointer g_iface, gpointer iface_data)
651 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
653 iface->get_type = gst_fd_sink_uri_get_type;
654 iface->get_protocols = gst_fd_sink_uri_get_protocols;
655 iface->get_uri = gst_fd_sink_uri_get_uri;
656 iface->set_uri = gst_fd_sink_uri_set_uri;