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641 lines
15 KiB
C
641 lines
15 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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*
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* gstfdsink.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-fdsink
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* @see_also: #GstFdSrc
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*
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* Write data to a unix file descriptor.
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*
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* This element will synchronize on the clock before writing the data on the
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* socket. For file descriptors where this does not make sense (files, ...) the
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* #GstBaseSink:sync property can be used to disable synchronisation.
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*
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* Last reviewed on 2006-04-28 (0.10.6)
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "../../gst/gst-i18n-lib.h"
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#include <sys/types.h>
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#ifdef G_OS_WIN32
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#include <io.h> /* lseek, open, close, read */
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#undef lseek
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#define lseek _lseeki64
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#undef off_t
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#define off_t guint64
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#endif
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <fcntl.h>
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#include <stdio.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef _MSC_VER
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#include <io.h>
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#endif
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#include <errno.h>
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#include <string.h>
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#include "gstfdsink.h"
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static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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GST_DEBUG_CATEGORY_STATIC (gst_fd_sink__debug);
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#define GST_CAT_DEFAULT gst_fd_sink__debug
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/* FdSink signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_FD
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};
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static void gst_fd_sink_uri_handler_init (gpointer g_iface,
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gpointer iface_data);
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static void
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_do_init (GType gst_fd_sink_type)
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{
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static const GInterfaceInfo urihandler_info = {
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gst_fd_sink_uri_handler_init,
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NULL,
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NULL
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};
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g_type_add_interface_static (gst_fd_sink_type, GST_TYPE_URI_HANDLER,
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&urihandler_info);
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GST_DEBUG_CATEGORY_INIT (gst_fd_sink__debug, "fdsink", 0, "fdsink element");
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}
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GST_BOILERPLATE_FULL (GstFdSink, gst_fd_sink, GstBaseSink, GST_TYPE_BASE_SINK,
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_do_init);
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static void gst_fd_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_fd_sink_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_fd_sink_dispose (GObject * obj);
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static gboolean gst_fd_sink_query (GstPad * pad, GstQuery * query);
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static GstFlowReturn gst_fd_sink_render (GstBaseSink * sink,
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GstBuffer * buffer);
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static gboolean gst_fd_sink_start (GstBaseSink * basesink);
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static gboolean gst_fd_sink_stop (GstBaseSink * basesink);
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static gboolean gst_fd_sink_unlock (GstBaseSink * basesink);
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static gboolean gst_fd_sink_unlock_stop (GstBaseSink * basesink);
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static gboolean gst_fd_sink_event (GstBaseSink * sink, GstEvent * event);
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static gboolean gst_fd_sink_do_seek (GstFdSink * fdsink, guint64 new_offset);
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static void
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gst_fd_sink_base_init (gpointer g_class)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_set_details_simple (gstelement_class,
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"Filedescriptor Sink",
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"Sink/File",
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"Write data to a file descriptor", "Erik Walthinsen <omega@cse.ogi.edu>");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sinktemplate));
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}
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static void
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gst_fd_sink_class_init (GstFdSinkClass * klass)
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{
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GObjectClass *gobject_class;
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GstBaseSinkClass *gstbasesink_class;
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gobject_class = G_OBJECT_CLASS (klass);
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gstbasesink_class = GST_BASE_SINK_CLASS (klass);
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gobject_class->set_property = gst_fd_sink_set_property;
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gobject_class->get_property = gst_fd_sink_get_property;
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gobject_class->dispose = gst_fd_sink_dispose;
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gstbasesink_class->get_times = NULL;
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gstbasesink_class->render = GST_DEBUG_FUNCPTR (gst_fd_sink_render);
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gstbasesink_class->start = GST_DEBUG_FUNCPTR (gst_fd_sink_start);
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gstbasesink_class->stop = GST_DEBUG_FUNCPTR (gst_fd_sink_stop);
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gstbasesink_class->unlock = GST_DEBUG_FUNCPTR (gst_fd_sink_unlock);
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gstbasesink_class->unlock_stop = GST_DEBUG_FUNCPTR (gst_fd_sink_unlock_stop);
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gstbasesink_class->event = GST_DEBUG_FUNCPTR (gst_fd_sink_event);
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g_object_class_install_property (gobject_class, ARG_FD,
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g_param_spec_int ("fd", "fd", "An open file descriptor to write to",
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0, G_MAXINT, 1, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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gst_fd_sink_init (GstFdSink * fdsink, GstFdSinkClass * klass)
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{
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GstPad *pad;
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pad = GST_BASE_SINK_PAD (fdsink);
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gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_fd_sink_query));
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fdsink->fd = 1;
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fdsink->uri = g_strdup_printf ("fd://%d", fdsink->fd);
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fdsink->bytes_written = 0;
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fdsink->current_pos = 0;
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GST_BASE_SINK (fdsink)->sync = TRUE;
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}
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static void
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gst_fd_sink_dispose (GObject * obj)
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{
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GstFdSink *fdsink = GST_FD_SINK (obj);
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g_free (fdsink->uri);
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fdsink->uri = NULL;
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G_OBJECT_CLASS (parent_class)->dispose (obj);
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}
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static gboolean
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gst_fd_sink_query (GstPad * pad, GstQuery * query)
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{
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GstFdSink *fdsink;
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GstFormat format;
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fdsink = GST_FD_SINK (GST_PAD_PARENT (pad));
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_POSITION:
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gst_query_parse_position (query, &format, NULL);
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switch (format) {
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case GST_FORMAT_DEFAULT:
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case GST_FORMAT_BYTES:
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gst_query_set_position (query, GST_FORMAT_BYTES, fdsink->current_pos);
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return TRUE;
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default:
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return FALSE;
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}
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case GST_QUERY_FORMATS:
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gst_query_set_formats (query, 2, GST_FORMAT_DEFAULT, GST_FORMAT_BYTES);
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return TRUE;
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case GST_QUERY_URI:
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gst_query_set_uri (query, fdsink->uri);
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return TRUE;
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default:
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return gst_pad_query_default (pad, query);
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}
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}
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static GstFlowReturn
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gst_fd_sink_render (GstBaseSink * sink, GstBuffer * buffer)
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{
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GstFdSink *fdsink;
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guint8 *data;
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guint size;
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gint written;
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#ifndef HAVE_WIN32
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gint retval;
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#endif
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fdsink = GST_FD_SINK (sink);
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g_return_val_if_fail (fdsink->fd >= 0, GST_FLOW_ERROR);
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data = GST_BUFFER_DATA (buffer);
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size = GST_BUFFER_SIZE (buffer);
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again:
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#ifndef HAVE_WIN32
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do {
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GST_DEBUG_OBJECT (fdsink, "going into select, have %d bytes to write",
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size);
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retval = gst_poll_wait (fdsink->fdset, GST_CLOCK_TIME_NONE);
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} while (retval == -1 && (errno == EINTR || errno == EAGAIN));
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if (retval == -1) {
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if (errno == EBUSY)
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goto stopped;
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else
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goto select_error;
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}
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#endif
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GST_DEBUG_OBJECT (fdsink, "writing %d bytes to file descriptor %d", size,
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fdsink->fd);
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written = write (fdsink->fd, data, size);
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/* check for errors */
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if (G_UNLIKELY (written < 0)) {
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/* try to write again on non-fatal errors */
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if (errno == EAGAIN || errno == EINTR)
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goto again;
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/* else go to our error handler */
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goto write_error;
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}
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/* all is fine when we get here */
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size -= written;
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data += written;
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fdsink->bytes_written += written;
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fdsink->current_pos += written;
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GST_DEBUG_OBJECT (fdsink, "wrote %d bytes, %d left", written, size);
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/* short write, select and try to write the remainder */
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if (G_UNLIKELY (size > 0))
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goto again;
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return GST_FLOW_OK;
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#ifndef HAVE_WIN32
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select_error:
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{
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GST_ELEMENT_ERROR (fdsink, RESOURCE, READ, (NULL),
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("select on file descriptor: %s.", g_strerror (errno)));
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GST_DEBUG_OBJECT (fdsink, "Error during select");
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return GST_FLOW_ERROR;
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}
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stopped:
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{
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GST_DEBUG_OBJECT (fdsink, "Select stopped");
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return GST_FLOW_WRONG_STATE;
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}
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#endif
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write_error:
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{
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switch (errno) {
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case ENOSPC:
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GST_ELEMENT_ERROR (fdsink, RESOURCE, NO_SPACE_LEFT, (NULL), (NULL));
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break;
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default:{
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GST_ELEMENT_ERROR (fdsink, RESOURCE, WRITE, (NULL),
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("Error while writing to file descriptor %d: %s",
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fdsink->fd, g_strerror (errno)));
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}
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}
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return GST_FLOW_ERROR;
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}
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}
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static gboolean
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gst_fd_sink_check_fd (GstFdSink * fdsink, int fd)
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{
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struct stat stat_results;
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off_t result;
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/* see that it is a valid file descriptor */
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if (fstat (fd, &stat_results) < 0)
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goto invalid;
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if (!S_ISREG (stat_results.st_mode))
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goto not_seekable;
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/* see if it is a seekable stream */
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result = lseek (fd, 0, SEEK_CUR);
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if (result == -1) {
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switch (errno) {
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case EINVAL:
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case EBADF:
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goto invalid;
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case ESPIPE:
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goto not_seekable;
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}
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} else
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GST_DEBUG_OBJECT (fdsink, "File descriptor %d is seekable", fd);
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return TRUE;
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invalid:
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{
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GST_ELEMENT_ERROR (fdsink, RESOURCE, WRITE, (NULL),
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("File descriptor %d is not valid: %s", fd, g_strerror (errno)));
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return FALSE;
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}
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not_seekable:
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{
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GST_DEBUG_OBJECT (fdsink, "File descriptor %d is a pipe", fd);
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return TRUE;
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}
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}
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static gboolean
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gst_fd_sink_start (GstBaseSink * basesink)
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{
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GstFdSink *fdsink;
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GstPollFD fd = GST_POLL_FD_INIT;
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fdsink = GST_FD_SINK (basesink);
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if (!gst_fd_sink_check_fd (fdsink, fdsink->fd))
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return FALSE;
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if ((fdsink->fdset = gst_poll_new (TRUE)) == NULL)
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goto socket_pair;
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fd.fd = fdsink->fd;
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gst_poll_add_fd (fdsink->fdset, &fd);
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gst_poll_fd_ctl_write (fdsink->fdset, &fd, TRUE);
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fdsink->bytes_written = 0;
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fdsink->current_pos = 0;
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return TRUE;
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/* ERRORS */
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socket_pair:
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{
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GST_ELEMENT_ERROR (fdsink, RESOURCE, OPEN_READ_WRITE, (NULL),
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GST_ERROR_SYSTEM);
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return FALSE;
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}
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}
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static gboolean
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gst_fd_sink_stop (GstBaseSink * basesink)
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{
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GstFdSink *fdsink = GST_FD_SINK (basesink);
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if (fdsink->fdset) {
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gst_poll_free (fdsink->fdset);
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fdsink->fdset = NULL;
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}
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return TRUE;
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}
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static gboolean
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gst_fd_sink_unlock (GstBaseSink * basesink)
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{
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GstFdSink *fdsink = GST_FD_SINK (basesink);
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GST_LOG_OBJECT (fdsink, "Flushing");
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GST_OBJECT_LOCK (fdsink);
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gst_poll_set_flushing (fdsink->fdset, TRUE);
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GST_OBJECT_UNLOCK (fdsink);
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return TRUE;
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}
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static gboolean
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gst_fd_sink_unlock_stop (GstBaseSink * basesink)
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{
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GstFdSink *fdsink = GST_FD_SINK (basesink);
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GST_LOG_OBJECT (fdsink, "No longer flushing");
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GST_OBJECT_LOCK (fdsink);
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gst_poll_set_flushing (fdsink->fdset, FALSE);
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GST_OBJECT_UNLOCK (fdsink);
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return TRUE;
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}
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static gboolean
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gst_fd_sink_update_fd (GstFdSink * fdsink, int new_fd)
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{
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if (new_fd < 0)
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return FALSE;
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if (!gst_fd_sink_check_fd (fdsink, new_fd))
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goto invalid;
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/* assign the fd */
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GST_OBJECT_LOCK (fdsink);
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if (fdsink->fdset) {
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GstPollFD fd = GST_POLL_FD_INIT;
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fd.fd = fdsink->fd;
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gst_poll_remove_fd (fdsink->fdset, &fd);
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fd.fd = new_fd;
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gst_poll_add_fd (fdsink->fdset, &fd);
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gst_poll_fd_ctl_write (fdsink->fdset, &fd, TRUE);
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}
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fdsink->fd = new_fd;
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g_free (fdsink->uri);
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fdsink->uri = g_strdup_printf ("fd://%d", fdsink->fd);
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GST_OBJECT_UNLOCK (fdsink);
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return TRUE;
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invalid:
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{
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return FALSE;
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}
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}
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static void
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gst_fd_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstFdSink *fdsink;
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g_return_if_fail (GST_IS_FD_SINK (object));
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fdsink = GST_FD_SINK (object);
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switch (prop_id) {
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case ARG_FD:{
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int fd;
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fd = g_value_get_int (value);
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gst_fd_sink_update_fd (fdsink, fd);
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break;
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}
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default:
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break;
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}
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}
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static void
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gst_fd_sink_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstFdSink *fdsink;
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g_return_if_fail (GST_IS_FD_SINK (object));
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fdsink = GST_FD_SINK (object);
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switch (prop_id) {
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case ARG_FD:
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g_value_set_int (value, fdsink->fd);
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break;
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default:
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break;
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}
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}
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static gboolean
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gst_fd_sink_do_seek (GstFdSink * fdsink, guint64 new_offset)
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{
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off_t result;
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result = lseek (fdsink->fd, new_offset, SEEK_SET);
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if (result == -1)
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goto seek_failed;
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fdsink->current_pos = new_offset;
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|
|
GST_DEBUG_OBJECT (fdsink, "File desciptor %d to seek to position "
|
|
"%" G_GUINT64_FORMAT, fdsink->fd, fdsink->current_pos);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
seek_failed:
|
|
{
|
|
GST_DEBUG_OBJECT (fdsink, "File desciptor %d failed to seek to position "
|
|
"%" G_GUINT64_FORMAT, fdsink->fd, new_offset);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_fd_sink_event (GstBaseSink * sink, GstEvent * event)
|
|
{
|
|
GstEventType type;
|
|
GstFdSink *fdsink;
|
|
|
|
fdsink = GST_FD_SINK (sink);
|
|
|
|
type = GST_EVENT_TYPE (event);
|
|
|
|
switch (type) {
|
|
case GST_EVENT_NEWSEGMENT:
|
|
{
|
|
gint64 start, stop, pos;
|
|
GstFormat format;
|
|
gst_event_parse_new_segment (event, NULL, NULL, &format, &start,
|
|
&stop, &pos);
|
|
|
|
if (format == GST_FORMAT_BYTES) {
|
|
/* only try to seek and fail when we are going to a different
|
|
* position */
|
|
if (fdsink->current_pos != start) {
|
|
/* FIXME, the seek should be performed on the pos field, start/stop are
|
|
* just boundaries for valid bytes offsets. We should also fill the file
|
|
* with zeroes if the new position extends the current EOF (sparse streams
|
|
* and segment accumulation). */
|
|
if (!gst_fd_sink_do_seek (fdsink, (guint64) start))
|
|
goto seek_failed;
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (fdsink,
|
|
"Ignored NEWSEGMENT event of format %u (%s)", (guint) format,
|
|
gst_format_get_name (format));
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
seek_failed:
|
|
{
|
|
GST_ELEMENT_ERROR (fdsink, RESOURCE, SEEK, (NULL),
|
|
("Error while seeking on file descriptor %d: %s",
|
|
fdsink->fd, g_strerror (errno)));
|
|
return FALSE;
|
|
}
|
|
|
|
}
|
|
|
|
/*** GSTURIHANDLER INTERFACE *************************************************/
|
|
|
|
static GstURIType
|
|
gst_fd_sink_uri_get_type (void)
|
|
{
|
|
return GST_URI_SINK;
|
|
}
|
|
|
|
static gchar **
|
|
gst_fd_sink_uri_get_protocols (void)
|
|
{
|
|
static gchar *protocols[] = { "fd", NULL };
|
|
|
|
return protocols;
|
|
}
|
|
|
|
static const gchar *
|
|
gst_fd_sink_uri_get_uri (GstURIHandler * handler)
|
|
{
|
|
GstFdSink *sink = GST_FD_SINK (handler);
|
|
|
|
return sink->uri;
|
|
}
|
|
|
|
static gboolean
|
|
gst_fd_sink_uri_set_uri (GstURIHandler * handler, const gchar * uri)
|
|
{
|
|
gchar *protocol;
|
|
GstFdSink *sink = GST_FD_SINK (handler);
|
|
gint fd;
|
|
|
|
protocol = gst_uri_get_protocol (uri);
|
|
if (strcmp (protocol, "fd") != 0) {
|
|
g_free (protocol);
|
|
return FALSE;
|
|
}
|
|
g_free (protocol);
|
|
|
|
if (sscanf (uri, "fd://%d", &fd) != 1)
|
|
return FALSE;
|
|
|
|
return gst_fd_sink_update_fd (sink, fd);
|
|
}
|
|
|
|
static void
|
|
gst_fd_sink_uri_handler_init (gpointer g_iface, gpointer iface_data)
|
|
{
|
|
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
|
|
|
|
iface->get_type = gst_fd_sink_uri_get_type;
|
|
iface->get_protocols = gst_fd_sink_uri_get_protocols;
|
|
iface->get_uri = gst_fd_sink_uri_get_uri;
|
|
iface->set_uri = gst_fd_sink_uri_set_uri;
|
|
}
|