gstreamer/gst/elements/gstfdsrc.c
Benjamin Otte de60fbda38 gst/gstutils.h: GST_PARENT_CALL and
Original commit message from CVS:
2004-01-08  Benjamin Otte  <in7y118@public.uni-hamburg.de>

* gst/gstutils.h:
Add GST_BOILERPLATE(_FULL), GST_PARENT_CALL and
GST_PARENT_CALL_WITH_DEFAULT
* gst/elements/gstaggregator.c:
* gst/elements/gstbufferstore.c:
* gst/elements/gstfakesink.c:
* gst/elements/gstfakesrc.c:
* gst/elements/gstfdsink.c:
* gst/elements/gstfdsrc.c:
* gst/elements/gstfilesink.c:
* gst/elements/gstfilesrc.c:
* gst/elements/gstidentity.c:
* gst/elements/gstmd5sink.c:
* gst/elements/gstmultidisksrc.c:
* gst/elements/gstpipefilter.c:
* gst/elements/gstshaper.c:
* gst/elements/gststatistics.c:
* gst/elements/gsttee.c:
* gst/elements/gsttypefindelement.c:
use them.
2004-01-08 04:10:18 +00:00

192 lines
5 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstfdsrc.c:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstfdsrc.h"
#define DEFAULT_BLOCKSIZE 4096
GST_DEBUG_CATEGORY_STATIC (gst_fdsrc_debug);
#define GST_CAT_DEFAULT gst_fdsrc_debug
GstElementDetails gst_fdsrc_details = GST_ELEMENT_DETAILS (
"Disk Source",
"Source/File",
"Synchronous read from a file",
"Erik Walthinsen <omega@cse.ogi.edu>"
);
/* FdSrc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_FD,
ARG_BLOCKSIZE,
};
#define _do_init(bla) \
GST_DEBUG_CATEGORY_INIT (gst_fdsrc_debug, "fdsrc", 0, "fdsrc element");
GST_BOILERPLATE_FULL (GstFdSrc, gst_fdsrc, GstElement, GST_TYPE_ELEMENT, _do_init);
static void gst_fdsrc_set_property (GObject *object, guint prop_id,
const GValue *value, GParamSpec *pspec);
static void gst_fdsrc_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static GstData * gst_fdsrc_get (GstPad *pad);
static void
gst_fdsrc_base_init (gpointer g_class)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (gstelement_class, &gst_fdsrc_details);
}
static void
gst_fdsrc_class_init (GstFdSrcClass *klass)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS (klass);
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
g_param_spec_int ("fd", "fd", "An open file descriptor to read from",
0, G_MAXINT, 0, G_PARAM_READWRITE));
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
gobject_class->set_property = gst_fdsrc_set_property;
gobject_class->get_property = gst_fdsrc_get_property;
}
static void gst_fdsrc_init(GstFdSrc *fdsrc) {
fdsrc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_pad_set_get_function (fdsrc->srcpad, gst_fdsrc_get);
gst_element_add_pad (GST_ELEMENT (fdsrc), fdsrc->srcpad);
fdsrc->fd = 0;
fdsrc->curoffset = 0;
fdsrc->blocksize = DEFAULT_BLOCKSIZE;
fdsrc->seq = 0;
}
static void
gst_fdsrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
GstFdSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_FDSRC (object));
src = GST_FDSRC (object);
switch (prop_id) {
case ARG_FD:
src->fd = g_value_get_int (value);
break;
case ARG_BLOCKSIZE:
src->blocksize = g_value_get_ulong (value);
break;
default:
break;
}
}
static void
gst_fdsrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
GstFdSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_FDSRC (object));
src = GST_FDSRC (object);
switch (prop_id) {
case ARG_BLOCKSIZE:
g_value_set_ulong (value, src->blocksize);
break;
case ARG_FD:
g_value_set_int (value, src->fd);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstData *
gst_fdsrc_get(GstPad *pad)
{
GstFdSrc *src;
GstBuffer *buf;
glong readbytes;
src = GST_FDSRC (gst_pad_get_parent (pad));
/* create the buffer */
buf = gst_buffer_new_and_alloc (src->blocksize);
/* read it in from the file */
readbytes = read (src->fd, GST_BUFFER_DATA (buf), src->blocksize);
/* if nothing was read, we're in eos */
if (readbytes == 0) {
gst_element_set_eos (GST_ELEMENT (src));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
if (readbytes == -1) {
g_error ("Error reading from file descriptor. Ending stream.\n");
gst_element_set_eos (GST_ELEMENT (src));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
GST_BUFFER_OFFSET (buf) = src->curoffset;
GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
src->curoffset += readbytes;
/* we're done, return the buffer */
return GST_DATA (buf);
}