gstreamer/plugins/elements/gsthttpsrc.c
Wim Taymans 51cbf22624 This is a megapatch with the following changes:
Original commit message from CVS:
This is a megapatch with the following changes:

- moved the gchar *name to GstObject, removed the ones in GstElement and
GstPad.
- moved the parent handling completely into GstObject. This cause *all* of
the plugins to fail (except those that used gst_pad_get_parent)
- rearanged the XML save handling.
- GstObject now has a class function save/restore_thyself.
- GstObject has a generic method gst_object_save_thyself, this makes it
possible to fire a signal wehever a new object is loaded. This is needed
so we can add XML save hooks.
- GstXML API has changed slightly. You now have to create a GstXML object
first before you can actually load something. This makes it possible to
attach a signal to GstXML whenever an object is loaded. I'm not sure we
will keep this interface.
- GstObject can now print the path_string without knowing about the GstPad and
GstElement types.
- Added gst_bin_get_by_name_recurse_up to lookup an element in the current
element hierarchy.
- added XML namespaces to the saved pipelines the namespace is:
http://gstreamer.net/gst-core/1.0/
namespaces are needed to distinguish user generated XML from the core XML.

Note that the plugins still contain a macro GST_OBJECT_PARENT that will be
replaced with gst_pad_get_parent shortly.
2001-01-29 00:06:02 +00:00

274 lines
7.3 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gsthttpsrc.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 <stdlib.h>
#include <unistd.h>
#include <gsthttpsrc.h>
GstElementDetails gst_httpsrc_details = {
"HTTP Source",
"Source/Network",
"Read data from an HTTP stream",
VERSION,
"Erik Walthinsen <omega@cse.ogi.edu>",
"(C) 1999",
};
/* HttpSrc signals and args */
enum {
/* FILL ME */
LAST_SIGNAL
};
enum {
ARG_0,
ARG_LOCATION,
ARG_BYTESPERREAD,
ARG_OFFSET
};
static void gst_httpsrc_class_init (GstHttpSrcClass *klass);
static void gst_httpsrc_init (GstHttpSrc *httpsrc);
static void gst_httpsrc_set_arg (GtkObject *object, GtkArg *arg, guint id);
static void gst_httpsrc_get_arg (GtkObject *object, GtkArg *arg, guint id);
static GstElementStateReturn gst_httpsrc_change_state (GstElement *element);
static GstBuffer * gst_httpsrc_get (GstPad *pad);
static gboolean gst_httpsrc_open_url (GstHttpSrc *src);
static void gst_httpsrc_close_url (GstHttpSrc *src);
static GstElementClass *parent_class = NULL;
//static guint gst_httpsrc_signals[LAST_SIGNAL] = { 0 };
GtkType
gst_httpsrc_get_type (void)
{
static GtkType httpsrc_type = 0;
if (!httpsrc_type) {
static const GtkTypeInfo httpsrc_info = {
"GstHttpSrc",
sizeof(GstHttpSrc),
sizeof(GstHttpSrcClass),
(GtkClassInitFunc)gst_httpsrc_class_init,
(GtkObjectInitFunc)gst_httpsrc_init,
(GtkArgSetFunc)gst_httpsrc_set_arg,
(GtkArgGetFunc)gst_httpsrc_get_arg,
(GtkClassInitFunc)NULL,
};
httpsrc_type = gtk_type_unique (GST_TYPE_ELEMENT, &httpsrc_info);
}
return httpsrc_type;
}
static void
gst_httpsrc_class_init (GstHttpSrcClass *klass)
{
GtkObjectClass *gtkobject_class;
GstElementClass *gstelement_class;
gtkobject_class = (GtkObjectClass*)klass;
gstelement_class = (GstElementClass*)klass;
parent_class = gtk_type_class (GST_TYPE_ELEMENT);
gtk_object_add_arg_type ("GstHttpSrc::location", GTK_TYPE_STRING,
GTK_ARG_READWRITE, ARG_LOCATION);
gtk_object_add_arg_type ("GstHttpSrc::bytesperread", GTK_TYPE_INT,
GTK_ARG_READWRITE, ARG_BYTESPERREAD);
gtkobject_class->set_arg = gst_httpsrc_set_arg;
gtkobject_class->get_arg = gst_httpsrc_get_arg;
gstelement_class->change_state = gst_httpsrc_change_state;
}
static void gst_httpsrc_init(GstHttpSrc *httpsrc) {
httpsrc->srcpad = gst_pad_new("src",GST_PAD_SRC);
gst_pad_set_get_function(httpsrc->srcpad,gst_httpsrc_get);
gst_element_add_pad(GST_ELEMENT(httpsrc),httpsrc->srcpad);
httpsrc->url = NULL;
httpsrc->request = NULL;
httpsrc->fd = 0;
httpsrc->curoffset = 0;
httpsrc->bytes_per_read = 4096;
}
static GstBuffer *
gst_httpsrc_get(GstPad *pad)
{
GstHttpSrc *src;
GstBuffer *buf;
glong readbytes;
g_return_val_if_fail (pad != NULL, NULL);
src = GST_HTTPSRC(gst_pad_get_parent (pad));
buf = gst_buffer_new();
GST_BUFFER_DATA(buf) = (gpointer)malloc(src->bytes_per_read);
readbytes = read(src->fd,GST_BUFFER_DATA(buf),src->bytes_per_read);
if (readbytes == 0) {
gst_element_signal_eos(GST_ELEMENT(src));
return NULL;
}
if (readbytes < src->bytes_per_read) {
// FIXME: set the buffer's EOF bit here
}
GST_BUFFER_OFFSET(buf) = src->curoffset;
GST_BUFFER_SIZE(buf) = readbytes;
src->curoffset += readbytes;
return buf;
}
static gboolean
gst_httpsrc_open_url (GstHttpSrc *httpsrc)
{
gint status;
g_return_val_if_fail (!GST_FLAG_IS_SET (httpsrc, GST_HTTPSRC_OPEN), FALSE);
g_return_val_if_fail (httpsrc->url != NULL, FALSE);
httpsrc->request = ghttp_request_new ();
ghttp_set_uri (httpsrc->request, httpsrc->url);
ghttp_set_sync (httpsrc->request, ghttp_async);
ghttp_set_header (httpsrc->request, "User-Agent", "GstHttpSrc");
ghttp_prepare (httpsrc->request);
/* process everything up to the actual data stream */
/* FIXME: should be in preroll, but hey */
status = 0;
while ((ghttp_get_status (httpsrc->request).proc != ghttp_proc_response)
&& (status >= 0)) {
status = ghttp_process (httpsrc->request);
}
/* get the fd so we can read data ourselves */
httpsrc->fd = ghttp_get_socket (httpsrc->request);
GST_FLAG_SET (httpsrc, GST_HTTPSRC_OPEN);
return TRUE;
}
/* unmap and close the file */
static void
gst_httpsrc_close_url (GstHttpSrc *src)
{
g_return_if_fail (GST_FLAG_IS_SET (src, GST_HTTPSRC_OPEN));
g_return_if_fail (src->fd > 0);
close(src->fd);
src->fd = 0;
GST_FLAG_UNSET (src, GST_HTTPSRC_OPEN);
}
static void
gst_httpsrc_set_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstHttpSrc *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_HTTPSRC (object));
src = GST_HTTPSRC (object);
switch(id) {
case ARG_LOCATION:
/* the element must not be playing in order to do this */
g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
if (src->url) g_free (src->url);
/* clear the url if we get a NULL (is that possible?) */
if (GTK_VALUE_STRING (*arg) == NULL) {
gst_element_set_state (GST_ELEMENT (object),GST_STATE_NULL);
src->url = NULL;
/* otherwise set the new url */
} else {
src->url = g_strdup (GTK_VALUE_STRING (*arg));
}
break;
case ARG_BYTESPERREAD:
src->bytes_per_read = GTK_VALUE_INT (*arg);
break;
default:
break;
}
}
static void
gst_httpsrc_get_arg (GtkObject *object, GtkArg *arg, guint id)
{
GstHttpSrc *httpsrc;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_HTTPSRC (object));
httpsrc = GST_HTTPSRC (object);
switch (id) {
case ARG_LOCATION:
GTK_VALUE_STRING (*arg) = httpsrc->url;
break;
case ARG_BYTESPERREAD:
GTK_VALUE_INT (*arg) = httpsrc->bytes_per_read;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static GstElementStateReturn
gst_httpsrc_change_state (GstElement *element)
{
g_return_val_if_fail (GST_IS_HTTPSRC (element), GST_STATE_FAILURE);
if (GST_STATE_PENDING (element) == GST_STATE_NULL) {
if (GST_FLAG_IS_SET (element, GST_HTTPSRC_OPEN))
gst_httpsrc_close_url (GST_HTTPSRC (element));
} else {
if (!GST_FLAG_IS_SET (element, GST_HTTPSRC_OPEN)) {
if (!gst_httpsrc_open_url (GST_HTTPSRC (element)))
return GST_STATE_FAILURE;
}
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}