gstreamer/plugins/elements/gstmultidisksrc.c
Wim Taymans 0837e1e495 Modified a lot of plugins to use the caps system.
Original commit message from CVS:
Modified a lot of plugins to use the caps system.
Modified the caps of audio/raw to our agreed properties.
Added the multidisksrc plugin of Dominic Ludlam
Renamed audiosink/src to osssink/src and updated all the examples using
the old name. Moved oss specific plugins in an oss directory. removed
the old audiosink from the elements/ dir.
removed audioraw.h metadata header files since we now use the properties.
There are still a few plugins that won't build because they include the
old audioraw.h header file. This will be fixed soon.
Make sure the caps are set in the plugins as described by their
padtemplates (this should solve problems with gstmediaplay with various
media files).

*please don't panic when some plugins won't build, just cd manually into
the plugin dirs* This will be fixed soon.
2001-03-24 17:22:03 +00:00

305 lines
8.7 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2001 Dominic Ludlam <dom@recoil.org>
*
* gstmultidisksrc.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 <unistd.h>
#include <sys/mman.h>
//#define GST_DEBUG_ENABLED
#include "gstmultidisksrc.h"
GstElementDetails gst_multidisksrc_details = {
"Multi Disk Source",
"Source/File",
"Read from multiple files in order",
VERSION,
"Dominic Ludlam <dom@openfx.org>",
"(C) 2001",
};
/* DiskSrc signals and args */
enum {
NEW_FILE,
LAST_SIGNAL
};
enum {
ARG_0,
ARG_LOCATIONS,
};
static void gst_multidisksrc_class_init (GstMultiDiskSrcClass *klass);
static void gst_multidisksrc_init (GstMultiDiskSrc *disksrc);
static void gst_multidisksrc_set_arg (GtkObject *object, GtkArg *arg, guint id);
static void gst_multidisksrc_get_arg (GtkObject *object, GtkArg *arg, guint id);
static GstBuffer * gst_multidisksrc_get (GstPad *pad);
//static GstBuffer * gst_multidisksrc_get_region (GstPad *pad,GstRegionType type,guint64 offset,guint64 len);
static GstElementStateReturn gst_multidisksrc_change_state (GstElement *element);
static gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad);
static void gst_multidisksrc_close_file (GstMultiDiskSrc *src);
static GstElementClass *parent_class = NULL;
static guint gst_multidisksrc_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_multidisksrc_get_type(void)
{
static GtkType multidisksrc_type = 0;
if (!multidisksrc_type) {
static const GtkTypeInfo multidisksrc_info = {
"GstMultiDiskSrc",
sizeof(GstMultiDiskSrc),
sizeof(GstMultiDiskSrcClass),
(GtkClassInitFunc)gst_multidisksrc_class_init,
(GtkObjectInitFunc)gst_multidisksrc_init,
(GtkArgSetFunc)gst_multidisksrc_set_arg,
(GtkArgGetFunc)gst_multidisksrc_get_arg,
(GtkClassInitFunc)NULL,
};
multidisksrc_type = gtk_type_unique (GST_TYPE_ELEMENT, &multidisksrc_info);
}
return multidisksrc_type;
}
static void
gst_multidisksrc_class_init (GstMultiDiskSrcClass *klass)
{
GtkObjectClass *gtkobject_class;
GstElementClass *gstelement_class;
gtkobject_class = (GtkObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = gtk_type_class (GST_TYPE_ELEMENT);
gst_multidisksrc_signals[NEW_FILE] =
gtk_signal_new ("new_file", GTK_RUN_LAST, gtkobject_class->type,
GTK_SIGNAL_OFFSET (GstMultiDiskSrcClass, new_file),
gtk_marshal_NONE__POINTER, GTK_TYPE_NONE, 1,
GTK_TYPE_POINTER);
gtk_object_class_add_signals (gtkobject_class, gst_multidisksrc_signals, LAST_SIGNAL);
gtk_object_add_arg_type ("GstMultiDiskSrc::locations", GTK_TYPE_POINTER,
GTK_ARG_READWRITE, ARG_LOCATIONS);
gtkobject_class->set_arg = gst_multidisksrc_set_arg;
gtkobject_class->get_arg = gst_multidisksrc_get_arg;
gstelement_class->change_state = gst_multidisksrc_change_state;
}
static void
gst_multidisksrc_init (GstMultiDiskSrc *multidisksrc)
{
// GST_FLAG_SET (disksrc, GST_SRC_);
multidisksrc->srcpad = gst_pad_new ("src", GST_PAD_SRC);
gst_pad_set_get_function (multidisksrc->srcpad,gst_multidisksrc_get);
// gst_pad_set_getregion_function (multidisksrc->srcpad,gst_multidisksrc_get_region);
gst_element_add_pad (GST_ELEMENT (multidisksrc), multidisksrc->srcpad);
multidisksrc->listptr = NULL;
multidisksrc->currentfilename = NULL;
multidisksrc->fd = 0;
multidisksrc->size = 0;
multidisksrc->map = NULL;
multidisksrc->new_seek = FALSE;
}
static void
gst_multidisksrc_set_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstMultiDiskSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_MULTIDISKSRC (object));
src = GST_MULTIDISKSRC (object);
switch(id) {
case ARG_LOCATIONS:
/* the element must be stopped in order to do this */
g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
/* clear the filename if we get a NULL */
if (GTK_VALUE_POINTER (*arg) == NULL) {
gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
src->listptr = NULL;
/* otherwise set the new filenames */
} else {
src->listptr = GTK_VALUE_POINTER(*arg);
}
break;
default:
break;
}
}
static void
gst_multidisksrc_get_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstMultiDiskSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_MULTIDISKSRC (object));
src = GST_MULTIDISKSRC (object);
switch (id) {
case ARG_LOCATIONS:
GTK_VALUE_POINTER (*arg) = src->listptr;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
/**
* gst_disksrc_get:
* @pad: #GstPad to push a buffer from
*
* Push a new buffer from the disksrc at the current offset.
*/
static GstBuffer *
gst_multidisksrc_get (GstPad *pad)
{
GstMultiDiskSrc *src;
GstBuffer *buf;
GSList *list;
g_return_val_if_fail (pad != NULL, NULL);
src = GST_MULTIDISKSRC (gst_pad_get_parent (pad));
if (GST_FLAG_IS_SET (src, GST_MULTIDISKSRC_OPEN))
gst_multidisksrc_close_file(src);
if (!src->listptr) {
gst_pad_set_eos(pad);
return FALSE;
}
list = src->listptr;
src->currentfilename = (gchar *) list->data;
src->listptr = src->listptr->next;
if (!gst_multidisksrc_open_file(src, pad))
return NULL;
// emitted after the open, as the user may free the list and string from here
gtk_signal_emit(GTK_OBJECT(src), gst_multidisksrc_signals[NEW_FILE], list);
/* create the buffer */
// FIXME: should eventually use a bufferpool for this
buf = gst_buffer_new ();
g_return_val_if_fail (buf != NULL, NULL);
/* simply set the buffer to point to the correct region of the file */
GST_BUFFER_DATA (buf) = src->map;
GST_BUFFER_OFFSET (buf) = 0;
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_DONTFREE);
if (src->new_seek) {
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLUSH);
src->new_seek = FALSE;
}
/* we're done, return the buffer */
return buf;
}
/* open the file and mmap it, necessary to go to READY state */
static
gboolean gst_multidisksrc_open_file (GstMultiDiskSrc *src, GstPad *srcpad)
{
g_return_val_if_fail (!GST_FLAG_IS_SET (src, GST_MULTIDISKSRC_OPEN), FALSE);
/* open the file */
src->fd = open ((const char *) src->currentfilename, O_RDONLY);
if (src->fd < 0) {
perror ("open");
gst_element_error (GST_ELEMENT (src), g_strconcat("opening file \"", src->currentfilename, "\"", NULL));
return FALSE;
} else {
/* find the file length */
src->size = lseek (src->fd, 0, SEEK_END);
lseek (src->fd, 0, SEEK_SET);
/* map the file into memory */
src->map = mmap (NULL, src->size, PROT_READ, MAP_SHARED, src->fd, 0);
madvise (src->map,src->size, 2);
/* collapse state if that failed */
if (src->map == NULL) {
close (src->fd);
gst_element_error (GST_ELEMENT (src),"mmapping file");
return FALSE;
}
GST_FLAG_SET (src, GST_MULTIDISKSRC_OPEN);
src->new_seek = TRUE;
}
return TRUE;
}
/* unmap and close the file */
static void
gst_multidisksrc_close_file (GstMultiDiskSrc *src)
{
g_return_if_fail (GST_FLAG_IS_SET (src, GST_MULTIDISKSRC_OPEN));
/* unmap the file from memory and close the file */
munmap (src->map, src->size);
close (src->fd);
/* zero out a lot of our state */
src->fd = 0;
src->size = 0;
src->map = NULL;
src->new_seek = FALSE;
GST_FLAG_UNSET (src, GST_MULTIDISKSRC_OPEN);
}
static GstElementStateReturn
gst_multidisksrc_change_state (GstElement *element)
{
g_return_val_if_fail (GST_IS_MULTIDISKSRC (element), GST_STATE_FAILURE);
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_FLAG_IS_SET (element, GST_MULTIDISKSRC_OPEN))
gst_multidisksrc_close_file (GST_MULTIDISKSRC (element));
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}