gstreamer/ext/libmms/gstmms.c
Thomas Vander Stichele 06e1730270 I'm too lazy to comment this
Original commit message from CVS:
patch by tim, fix obvious crasher
2005-01-04 13:57:03 +00:00

432 lines
11 KiB
C

/*
*
* GStreamer
* Copyright (C) 1999-2001 Erik Walthinsen <omega@cse.ogi.edu>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <gst/gst.h>
#include <string.h>
#include "gstmms.h"
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_LOCATION,
ARG_BLOCKSIZE
};
GST_DEBUG_CATEGORY (mmssrc_debug);
#define GST_CATEGORY_DEFAULT mmssrc_debug
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-ms-asf")
);
static void gst_mms_class_init (GstMMSClass * klass);
static void gst_mms_base_init (GstMMSClass * klass);
static void gst_mms_init (GstMMS * mmssrc);
static void gst_mms_uri_handler_init (gpointer g_iface, gpointer iface_data);
static void gst_mms_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_mms_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static const GstQueryType *gst_mms_get_query_types (GstPad * pad);
static const GstFormat *gst_mms_get_formats (GstPad * pad);
static gboolean gst_mms_srcpad_query (GstPad * pad, GstQueryType type,
GstFormat * fmt, gint64 * value);
static GstElementStateReturn gst_mms_change_state (GstElement * elem);
static GstData *gst_mms_get (GstPad * pad);
static GstElementClass *parent_class = NULL;
static void
_urihandler_init (GType mms_type)
{
static const GInterfaceInfo urihandler_info = {
gst_mms_uri_handler_init,
NULL,
NULL
};
g_type_add_interface_static (mms_type, GST_TYPE_URI_HANDLER,
&urihandler_info);
}
GType
gst_mms_get_type (void)
{
static GType plugin_type = 0;
if (!plugin_type) {
static const GTypeInfo plugin_info = {
sizeof (GstMMSClass),
(GBaseInitFunc) gst_mms_base_init,
NULL,
(GClassInitFunc) gst_mms_class_init,
NULL,
NULL,
sizeof (GstMMS),
0,
(GInstanceInitFunc) gst_mms_init,
};
plugin_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstMMS", &plugin_info, 0);
}
return plugin_type;
}
static void
gst_mms_base_init (GstMMSClass * klass)
{
static GstElementDetails plugin_details = {
"MMS streaming protocol support",
"Source/Network",
"Receive data streamed via MSFT Multi Media Server protocol",
"Maciej Katafiasz <mathrick@users.sourceforge.net>"
};
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (mmssrc_debug, "mmssrc", 0, "MMS Source Element");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_set_details (element_class, &plugin_details);
}
/* initialize the plugin's class */
static void
gst_mms_class_init (GstMMSClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
_urihandler_init (GST_TYPE_MMS);
g_object_class_install_property (gobject_class, ARG_LOCATION,
g_param_spec_string ("location", "location",
"Host URL to connect to. Accepted are mms://, mmsu://, mmst:// URL types",
NULL, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, ARG_BLOCKSIZE,
g_param_spec_int ("blocksize", "blocksize",
"How many bytes should be read at once", 0, 65536, 2048,
G_PARAM_READWRITE));
gobject_class->set_property = gst_mms_set_property;
gobject_class->get_property = gst_mms_get_property;
gstelement_class->change_state = gst_mms_change_state;
}
/* initialize the new element
* instantiate pads and add them to element
* set functions
* initialize structure
*/
static void
gst_mms_init (GstMMS * mmssrc)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (mmssrc);
mmssrc->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
gst_pad_set_get_function (mmssrc->srcpad, gst_mms_get);
gst_pad_set_query_function (mmssrc->srcpad, gst_mms_srcpad_query);
gst_pad_set_query_type_function (mmssrc->srcpad, gst_mms_get_query_types);
gst_pad_set_formats_function (mmssrc->srcpad, gst_mms_get_formats);
gst_element_add_pad (GST_ELEMENT (mmssrc), mmssrc->srcpad);
mmssrc->uri_name = NULL;
mmssrc->connection = NULL;
mmssrc->blocksize = 2048;
}
/*
* location querying and so on.
*/
static const GstQueryType *
gst_mms_get_query_types (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_TOTAL,
GST_QUERY_POSITION,
0
};
return types;
}
static const GstFormat *
gst_mms_get_formats (GstPad * pad)
{
static const GstFormat formats[] = {
GST_FORMAT_BYTES,
0,
};
return formats;
}
static gboolean
gst_mms_srcpad_query (GstPad * pad, GstQueryType type,
GstFormat * format, gint64 * value)
{
GstMMS *mmssrc = GST_MMS (gst_pad_get_parent (pad));
gboolean res = TRUE;
if (*format != GST_FORMAT_BYTES)
return FALSE;
switch (type) {
case GST_QUERY_TOTAL:
*value = (gint64) mms_get_length (mmssrc->connection);
break;
case GST_QUERY_POSITION:
*value = (gint64) mms_get_current_pos (mmssrc->connection);
break;
default:
res = FALSE;
break;
}
return res;
}
/* get function
* this function generates new data when needed
*/
static GstData *
gst_mms_get (GstPad * pad)
{
GstMMS *mmssrc;
GstBuffer *buf;
guint8 *data;
gint result;
/* DEBUG */
GstFormat fmt = GST_FORMAT_BYTES;
gint64 query_res;
g_return_val_if_fail (GST_IS_PAD (pad), NULL);
mmssrc = GST_MMS (GST_OBJECT_PARENT (pad));
g_return_val_if_fail (GST_IS_MMS (mmssrc), NULL);
buf = gst_buffer_new ();
g_return_val_if_fail (buf, NULL);
data = g_malloc0 (mmssrc->blocksize);
GST_BUFFER_DATA (buf) = data;
GST_DEBUG ("mms: data: %p\n", data);
g_return_val_if_fail (GST_BUFFER_DATA (buf) != NULL, NULL);
GST_BUFFER_SIZE (buf) = 0;
GST_DEBUG ("reading %d bytes", mmssrc->blocksize);
result = mms_read (NULL, mmssrc->connection, data, mmssrc->blocksize);
GST_BUFFER_OFFSET (buf) = mms_get_current_pos (mmssrc->connection) - result;
GST_BUFFER_SIZE (buf) = result;
/* DEBUG */
gst_pad_query (gst_element_get_pad (GST_ELEMENT (mmssrc), "src"),
GST_QUERY_POSITION, &fmt, &query_res);
GST_DEBUG ("mms position: %lld\n", query_res);
/* EOS? */
if (result == 0) {
gst_buffer_unref (buf);
GST_DEBUG ("Returning EOS");
gst_element_set_eos (GST_ELEMENT (mmssrc));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
return GST_DATA (buf);
}
static GstElementStateReturn
gst_mms_change_state (GstElement * elem)
{
GstMMS *mms = GST_MMS (elem);
switch (GST_STATE_TRANSITION (elem)) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_NULL:
break;
case GST_STATE_READY_TO_PAUSED:
if (!mms->uri_name)
return GST_STATE_FAILURE;
/* FIXME: pass some sane arguments here */
mms->connection = mms_connect (NULL, NULL, mms->uri_name, 128 * 1024);
if (!mms->connection) {
return GST_STATE_FAILURE;
}
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (elem);
return GST_STATE_SUCCESS;
}
static void
gst_mms_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMMS *mmssrc;
g_return_if_fail (GST_IS_MMS (object));
mmssrc = GST_MMS (object);
switch (prop_id) {
case ARG_LOCATION:
mmssrc->uri_name = g_value_dup_string (value);
break;
case ARG_BLOCKSIZE:
mmssrc->blocksize = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_mms_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstMMS *mmssrc;
g_return_if_fail (GST_IS_MMS (object));
mmssrc = GST_MMS (object);
switch (prop_id) {
case ARG_LOCATION:
g_value_set_string (value, mmssrc->uri_name);
break;
case ARG_BLOCKSIZE:
g_value_set_int (value, mmssrc->blocksize);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* entry point to initialize the plug-in
* initialize the plug-in itself
* register the element factories and pad templates
* register the features
*/
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "mmssrc", GST_RANK_NONE, GST_TYPE_MMS);
}
static guint
gst_mms_uri_get_type (void)
{
return GST_URI_SRC;
}
static gchar **
gst_mms_uri_get_protocols (void)
{
static gchar *protocols[] = { "mms", "mmsh", "mmst", "mmsu", NULL };
return protocols;
}
static const gchar *
gst_mms_uri_get_uri (GstURIHandler * handler)
{
GstMMS *src = GST_MMS (handler);
return src->uri_name;
}
static gboolean
gst_mms_uri_set_uri (GstURIHandler * handler, const gchar * uri)
{
gchar *protocol;
GstMMS *src = GST_MMS (handler);
protocol = gst_uri_get_protocol (uri);
if (strcmp (protocol, "mms") != 0) {
g_free (protocol);
return FALSE;
}
g_free (protocol);
g_object_set (src, "location", uri, NULL);
return TRUE;
}
static void
gst_mms_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_mms_uri_get_type;
iface->get_protocols = gst_mms_uri_get_protocols;
iface->get_uri = gst_mms_uri_get_uri;
iface->set_uri = gst_mms_uri_set_uri;
}
/* this is the structure that gst-register looks for
* so keep the name plugin_desc, or you cannot get your plug-in registered */
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"mms",
"Microsoft Multi Media Server streaming protocol support",
plugin_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")