gstreamer/ext/libmms/gstmms.c
Tim-Philipp Müller 6cca025c97 ext/libmms/gstmms.c: Return FLOW_UNEXPECTED on EOS, not FLOW_ERROR. Also, no need to push our own EOS event on EOS, t...
Original commit message from CVS:
* ext/libmms/gstmms.c: (gst_mms_class_init), (gst_mms_create),
(gst_mms_start):
Return FLOW_UNEXPECTED on EOS, not FLOW_ERROR. Also, no need to
push our own EOS event on EOS, the base class will do that for us;
fix bogus query code; post semi-decent errors on the bus when an
error occurs in ::start(), otherwise the user will get to see
whatever cryptic default message GstBaseSrc comes up with.
2006-02-14 12:26:20 +00:00

481 lines
12 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 (gpointer g_class);
static void gst_mms_init (GstMMS * mmssrc, GstMMSClass * g_class);
static void gst_mms_finalize (GObject * gobject);
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 gboolean gst_mms_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_mms_start (GstBaseSrc * bsrc);
static gboolean gst_mms_stop (GstBaseSrc * bsrc);
static GstFlowReturn gst_mms_create (GstPushSrc * psrc, GstBuffer ** buf);
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);
GST_DEBUG_CATEGORY_INIT (mmssrc_debug, "mmssrc", 0, "MMS Source Element");
}
GST_BOILERPLATE_FULL (GstMMS, gst_mms, GstPushSrc, GST_TYPE_PUSH_SRC,
_urihandler_init);
static void
gst_mms_base_init (gpointer g_class)
{
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 (g_class);
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;
GstBaseSrcClass *gstbasesrc_class;
GstPushSrcClass *gstpushsrc_class;
gobject_class = (GObjectClass *) klass;
gstbasesrc_class = (GstBaseSrcClass *) klass;
gstpushsrc_class = (GstPushSrcClass *) klass;
gobject_class->set_property = gst_mms_set_property;
gobject_class->get_property = gst_mms_get_property;
gobject_class->finalize = gst_mms_finalize;
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));
gstbasesrc_class->start = GST_DEBUG_FUNCPTR (gst_mms_start);
gstbasesrc_class->stop = GST_DEBUG_FUNCPTR (gst_mms_stop);
gstpushsrc_class->create = GST_DEBUG_FUNCPTR (gst_mms_create);
}
/* initialize the new element
* instantiate pads and add them to element
* set functions
* initialize structure
*/
static void
gst_mms_init (GstMMS * mmssrc, GstMMSClass * g_class)
{
gst_pad_set_query_function (GST_BASE_SRC (mmssrc)->srcpad, gst_mms_src_query);
gst_pad_set_query_type_function (GST_BASE_SRC (mmssrc)->srcpad,
gst_mms_get_query_types);
mmssrc->uri_name = NULL;
mmssrc->connection = NULL;
mmssrc->connection_h = NULL;
mmssrc->blocksize = 2048;
}
static void
gst_mms_finalize (GObject * gobject)
{
GstMMS *mmssrc = GST_MMS (gobject);
gst_mms_stop (GST_BASE_SRC (mmssrc));
if (mmssrc->uri_name) {
g_free (mmssrc->uri_name);
mmssrc->uri_name = NULL;
}
if (G_OBJECT_CLASS (parent_class)->finalize)
G_OBJECT_CLASS (parent_class)->finalize (gobject);
}
/*
* location querying and so on.
*/
static const GstQueryType *
gst_mms_get_query_types (GstPad * pad)
{
static const GstQueryType types[] = {
GST_QUERY_POSITION,
GST_QUERY_DURATION,
0
};
return types;
}
static gboolean
gst_mms_src_query (GstPad * pad, GstQuery * query)
{
GstMMS *mmssrc = GST_MMS (gst_pad_get_parent (pad));
gboolean res = TRUE;
GstFormat format;
gint64 value;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
gst_query_parse_position (query, &format, &value);
if (format != GST_FORMAT_BYTES) {
res = FALSE;
break;
}
if (mmssrc->connection) {
value = (gint64) mms_get_current_pos (mmssrc->connection);
} else {
value = (gint64) mmsh_get_current_pos (mmssrc->connection_h);
}
gst_query_set_position (query, format, value);
break;
case GST_QUERY_DURATION:
gst_query_parse_duration (query, &format, &value);
if (format != GST_FORMAT_BYTES) {
res = FALSE;
break;
}
if (mmssrc->connection) {
value = (gint64) mms_get_length (mmssrc->connection);
} else {
value = (gint64) mmsh_get_length (mmssrc->connection_h);
}
gst_query_set_duration (query, format, value);
break;
default:
res = FALSE;
break;
}
gst_object_unref (mmssrc);
return res;
}
/* get function
* this function generates new data when needed
*/
static GstFlowReturn
gst_mms_create (GstPushSrc * psrc, GstBuffer ** buf)
{
GstMMS *mmssrc;
guint8 *data;
gint result;
GstFlowReturn ret = GST_FLOW_OK;
/* DEBUG */
GstFormat fmt = GST_FORMAT_BYTES;
gint64 query_res;
mmssrc = GST_MMS (psrc);
*buf = gst_buffer_new_and_alloc (mmssrc->blocksize);
if (NULL == *buf) {
ret = GST_FLOW_ERROR;
goto done;
}
data = GST_BUFFER_DATA (*buf);
GST_DEBUG ("mms: data: %p\n", data);
if (NULL == GST_BUFFER_DATA (*buf)) {
ret = GST_FLOW_ERROR;
gst_buffer_unref (*buf);
*buf = NULL;
goto done;
}
GST_BUFFER_SIZE (*buf) = 0;
GST_DEBUG ("reading %d bytes", mmssrc->blocksize);
if (mmssrc->connection) {
result =
mms_read (NULL, mmssrc->connection, (char *) data, mmssrc->blocksize);
} else {
result =
mmsh_read (NULL, mmssrc->connection_h, (char *) data,
mmssrc->blocksize);
}
/* EOS? */
if (result == 0) {
gst_buffer_unref (*buf);
*buf = NULL;
GST_DEBUG ("Returning EOS");
ret = GST_FLOW_UNEXPECTED;
goto done;
}
if (mmssrc->connection) {
GST_BUFFER_OFFSET (*buf) =
mms_get_current_pos (mmssrc->connection) - result;
} else {
GST_BUFFER_OFFSET (*buf) =
mmsh_get_current_pos (mmssrc->connection_h) - result;
}
GST_BUFFER_SIZE (*buf) = result;
/* DEBUG */
fmt = GST_FORMAT_BYTES;
gst_pad_query_position (GST_BASE_SRC (mmssrc)->srcpad, &fmt, &query_res);
GST_DEBUG ("mms position: %" G_GINT64_FORMAT, query_res);
done:
return ret;
}
static gboolean
gst_mms_start (GstBaseSrc * bsrc)
{
GstMMS *mms;
gboolean ret = FALSE;
mms = GST_MMS (bsrc);
if (!mms->uri_name || *mms->uri_name == '\0') {
GST_ELEMENT_ERROR (mms, RESOURCE, OPEN_READ,
("No URI to open specified"), (NULL));
return FALSE;
}
/* FIXME: pass some sane arguments here */
gst_mms_stop (bsrc);
mms->connection = mms_connect (NULL, NULL, mms->uri_name, 128 * 1024);
if (mms->connection) {
ret = TRUE;
} else {
mms->connection_h = mmsh_connect (NULL, NULL, mms->uri_name, 128 * 1024);
if (mms->connection_h) {
ret = TRUE;
} else {
GST_ELEMENT_ERROR (mms, RESOURCE, OPEN_READ,
("Could not connect to this stream"), (NULL));
}
}
return ret;
}
static gboolean
gst_mms_stop (GstBaseSrc * bsrc)
{
GstMMS *mms;
mms = GST_MMS (bsrc);
if (mms->connection != NULL) {
mms_close (mms->connection);
mms->connection = NULL;
}
if (mms->connection_h != NULL) {
mmsh_close (mms->connection_h);
mms->connection_h = NULL;
}
return TRUE;
}
static void
gst_mms_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstMMS *mmssrc;
mmssrc = GST_MMS (object);
switch (prop_id) {
case ARG_LOCATION:
if (mmssrc->uri_name) {
g_free (mmssrc->uri_name);
mmssrc->uri_name = NULL;
}
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;
mmssrc = GST_MMS (object);
switch (prop_id) {
case ARG_LOCATION:
if (mmssrc->uri_name)
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) && (strcmp (protocol, "mmsh") != 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/")