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/*
* camresourcemanager.c - GStreamer CAM (EN50221) Resource Manager
* Copyright (C) 2007 Alessandro Decina
*
* Authors:
* Alessandro Decina <alessandro@nnva.org>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "camresourcemanager.h"
#define GST_CAT_DEFAULT cam_debug_cat
#define TAG_PROFILE_ENQUIRY 0x9F8010
#define TAG_PROFILE_REPLY 0x9F8011
#define TAG_PROFILE_CHANGE 0x9F8012
static CamReturn session_request_impl (CamALApplication * application,
CamSLSession * session, CamSLResourceStatus * status);
static CamReturn open_impl (CamALApplication * application,
CamSLSession * session);
static CamReturn close_impl (CamALApplication * application,
CamSLSession * session);
static CamReturn data_impl (CamALApplication * application,
CamSLSession * session, guint tag, guint8 * buffer, guint length);
CamResourceManager *
cam_resource_manager_new (void)
{
CamALApplication *application;
CamResourceManager *mgr;
mgr = g_new0 (CamResourceManager, 1);
application = CAM_AL_APPLICATION (mgr);
_cam_al_application_init (application);
application->resource_id = CAM_AL_RESOURCE_MANAGER_ID;
application->session_request = session_request_impl;
application->open = open_impl;
application->close = close_impl;
application->data = data_impl;
return mgr;
}
void
cam_resource_manager_destroy (CamResourceManager * mgr)
{
_cam_al_application_destroy (CAM_AL_APPLICATION (mgr));
g_free (mgr);
}
static CamReturn
session_request_impl (CamALApplication * application,
CamSLSession * session, CamSLResourceStatus * status)
{
*status = CAM_SL_RESOURCE_STATUS_OPEN;
return CAM_RETURN_OK;
}
static CamReturn
send_simple (CamResourceManager * mgr, CamSLSession * session, guint tag)
{
guint8 *buffer;
guint offset;
guint buffer_size;
CamReturn ret;
cam_al_calc_buffer_size (CAM_AL_APPLICATION (mgr)->al, 0, &buffer_size,
&offset);
buffer = g_malloc (buffer_size);
ret = cam_al_application_write (CAM_AL_APPLICATION (mgr), session,
tag, buffer, buffer_size, 0);
g_free (buffer);
return ret;
}
static CamReturn
send_profile_enquiry (CamResourceManager * mgr, CamSLSession * session)
{
GST_DEBUG ("sending profile enquiry");
return send_simple (mgr, session, TAG_PROFILE_ENQUIRY);
}
static CamReturn
send_profile_change (CamResourceManager * mgr, CamSLSession * session)
{
GST_DEBUG ("sending profile change");
return send_simple (mgr, session, TAG_PROFILE_CHANGE);
}
static CamReturn
send_profile_reply (CamResourceManager * mgr, CamSLSession * session)
{
CamReturn ret;
guint8 *buffer;
guint8 *apdu_body;
guint buffer_size;
guint offset;
GList *resource_ids;
guint resource_ids_size;
GList *walk;
resource_ids = cam_al_get_resource_ids (CAM_AL_APPLICATION (mgr)->al);
resource_ids_size = g_list_length (resource_ids) * 4;
cam_al_calc_buffer_size (CAM_AL_APPLICATION (mgr)->al, resource_ids_size,
&buffer_size, &offset);
buffer = g_malloc (buffer_size);
apdu_body = buffer + offset;
for (walk = resource_ids; walk != NULL; walk = walk->next) {
GST_WRITE_UINT32_BE (apdu_body, GPOINTER_TO_UINT (walk->data));
apdu_body += 4;
}
g_list_free (resource_ids);
GST_DEBUG ("sending profile reply");
ret = cam_al_application_write (CAM_AL_APPLICATION (mgr), session,
TAG_PROFILE_REPLY, buffer, buffer_size, resource_ids_size);
g_free (buffer);
return ret;
}
static CamReturn
open_impl (CamALApplication * application, CamSLSession * session)
{
CamResourceManager *mgr = CAM_RESOURCE_MANAGER (application);
return send_profile_enquiry (mgr, session);
}
static CamReturn
close_impl (CamALApplication * application, CamSLSession * session)
{
return CAM_RETURN_OK;
}
static CamReturn
handle_profile_reply (CamResourceManager * mgr, CamSLSession * session,
guint8 * buffer, guint length)
{
/* the APDU contains length / 4 resource_ids */
/* FIXME: implement this once CamApplicationProxy is implemented */
GST_DEBUG ("got profile reply");
return send_profile_change (mgr, session);
}
static CamReturn
data_impl (CamALApplication * application, CamSLSession * session,
guint tag, guint8 * buffer, guint length)
{
CamResourceManager *mgr = CAM_RESOURCE_MANAGER (application);
switch (tag) {
case TAG_PROFILE_ENQUIRY:
send_profile_reply (mgr, session);
break;
case TAG_PROFILE_REPLY:
handle_profile_reply (mgr, session, buffer, length);
break;
case TAG_PROFILE_CHANGE:
send_profile_enquiry (mgr, session);
break;
default:
g_return_val_if_reached (CAM_RETURN_APPLICATION_ERROR);
}
/* FIXME: Shouldn't this return the retval from the functions above ? */
return CAM_RETURN_OK;
}
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