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/*
* Copyright (C) 2009 Igalia S.L
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "DataSourceGStreamer.h"
#if USE(GSTREAMER)
#include <gio/gio.h>
#include <glib.h>
#include <gst/gst.h>
#include <gst/pbutils/missing-plugins.h>
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC(webkit_data_src_debug);
#define GST_CAT_DEFAULT webkit_data_src_debug
static void webkit_data_src_uri_handler_init(gpointer g_iface,
gpointer iface_data);
static void webkit_data_src_finalize(WebkitDataSrc* src);
static GstStateChangeReturn webkit_data_src_change_state(GstElement* element,
GstStateChange transition);
static const GInterfaceInfo urihandler_info = {
webkit_data_src_uri_handler_init,
0, 0
};
static void _do_init(GType datasrc_type)
{
GST_DEBUG_CATEGORY_INIT(webkit_data_src_debug, "webkit_data_src", 0, "datasrc element");
g_type_add_interface_static(datasrc_type, GST_TYPE_URI_HANDLER,
&urihandler_info);
}
GST_BOILERPLATE_FULL(WebkitDataSrc, webkit_data_src, GstBin, GST_TYPE_BIN, _do_init);
static void webkit_data_src_base_init(gpointer klass)
{
GstElementClass* element_class = GST_ELEMENT_CLASS(klass);
gst_element_class_add_pad_template(element_class,
gst_static_pad_template_get(&src_template));
gst_element_class_set_details_simple(element_class, (gchar*) "WebKit data source element",
(gchar*) "Source",
(gchar*) "Handles data: uris",
(gchar*) "Philippe Normand <pnormand@igalia.com>");
}
static void webkit_data_src_class_init(WebkitDataSrcClass* klass)
{
GObjectClass* oklass = G_OBJECT_CLASS(klass);
GstElementClass* eklass = GST_ELEMENT_CLASS(klass);
oklass->finalize = (GObjectFinalizeFunc) webkit_data_src_finalize;
eklass->change_state = webkit_data_src_change_state;
}
static gboolean webkit_data_src_reset(WebkitDataSrc* src)
{
GstPad* targetpad;
if (src->kid) {
gst_element_set_state(src->kid, GST_STATE_NULL);
gst_bin_remove(GST_BIN(src), src->kid);
}
src->kid = gst_element_factory_make("giostreamsrc", "streamsrc");
if (!src->kid) {
GST_ERROR_OBJECT(src, "Failed to create giostreamsrc");
return FALSE;
}
gst_bin_add(GST_BIN(src), src->kid);
targetpad = gst_element_get_static_pad(src->kid, "src");
gst_ghost_pad_set_target(GST_GHOST_PAD(src->pad), targetpad);
gst_object_unref(targetpad);
return TRUE;
}
static void webkit_data_src_init(WebkitDataSrc* src,
WebkitDataSrcClass* g_class)
{
GstPadTemplate* pad_template = gst_static_pad_template_get(&src_template);
src->pad = gst_ghost_pad_new_no_target_from_template("src",
pad_template);
gst_element_add_pad(GST_ELEMENT(src), src->pad);
webkit_data_src_reset(src);
}
static void webkit_data_src_finalize(WebkitDataSrc* src)
{
g_free(src->uri);
if (src->kid) {
GST_DEBUG_OBJECT(src, "Removing giostreamsrc element");
gst_element_set_state(src->kid, GST_STATE_NULL);
gst_bin_remove(GST_BIN(src), src->kid);
src->kid = 0;
}
GST_CALL_PARENT(G_OBJECT_CLASS, finalize, ((GObject* )(src)));
}
static GstStateChangeReturn webkit_data_src_change_state(GstElement* element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
WebkitDataSrc* src = WEBKIT_DATA_SRC(element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!src->kid) {
gst_element_post_message(element,
gst_missing_element_message_new(element, "giostreamsrc"));
GST_ELEMENT_ERROR(src, CORE, MISSING_PLUGIN, (0), ("no giostreamsrc"));
return GST_STATE_CHANGE_FAILURE;
}
break;
default:
break;
}
ret = GST_ELEMENT_CLASS(parent_class)->change_state(element, transition);
if (G_UNLIKELY(ret == GST_STATE_CHANGE_FAILURE))
return ret;
// Downwards state change code should be here, after chaining up
// to the parent class.
return ret;
}
/*** GSTURIHANDLER INTERFACE *************************************************/
static GstURIType webkit_data_src_uri_get_type(void)
{
return GST_URI_SRC;
}
static gchar** webkit_data_src_uri_get_protocols(void)
{
static gchar* protocols[] = {(gchar*) "data", 0 };
return protocols;
}
static const gchar* webkit_data_src_uri_get_uri(GstURIHandler* handler)
{
WebkitDataSrc* src = WEBKIT_DATA_SRC(handler);
return src->uri;
}
static gboolean webkit_data_src_uri_set_uri(GstURIHandler* handler, const gchar* uri)
{
WebkitDataSrc* src = WEBKIT_DATA_SRC(handler);
// URI as defined in RFC2397:
// "data:" [ mediatype ] [ ";base64" ] "," data
// we parse URIs like this one:
// data:audio/3gpp;base64,AA...
gchar** scheme_and_remains = g_strsplit(uri, ":", 2);
gchar** mime_type_and_options = g_strsplit(scheme_and_remains[1], ";", 0);
gint options_size = g_strv_length(mime_type_and_options);
gchar* data = 0;
gchar* mime_type = 0;
gint ret = FALSE;
// we require uris with a specified mime-type and base64-encoded
// data. It doesn't make much sense anyway to play plain/text data
// with very few allowed characters (as per the RFC).
if (GST_STATE(src) >= GST_STATE_PAUSED) {
GST_ERROR_OBJECT(src, "Element already configured. Reset it and retry");
} else if (!options_size)
GST_ERROR_OBJECT(src, "A mime-type is needed in %s", uri);
else {
mime_type = mime_type_and_options[0];
data = mime_type_and_options[options_size-1];
guchar* decoded_data = 0;
gsize decoded_size;
if (!g_str_has_prefix(data, "base64"))
GST_ERROR_OBJECT(src, "Data has to be base64-encoded in %s", uri);
else {
decoded_data = g_base64_decode(data+7, &decoded_size);
GInputStream* stream = g_memory_input_stream_new_from_data(decoded_data,
decoded_size,
g_free);
g_object_set(src->kid, "stream", stream, NULL);
g_object_unref(stream);
if (src->uri) {
g_free(src->uri);
src->uri = 0;
}
src->uri = g_strdup(uri);
ret = TRUE;
}
}
g_strfreev(scheme_and_remains);
g_strfreev(mime_type_and_options);
return ret;
}
static void webkit_data_src_uri_handler_init(gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface* iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = webkit_data_src_uri_get_type;
iface->get_protocols = webkit_data_src_uri_get_protocols;
iface->get_uri = webkit_data_src_uri_get_uri;
iface->set_uri = webkit_data_src_uri_set_uri;
}
#endif // USE(GSTREAMER)
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