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/*****************************************************************
* gmerlin - a general purpose multimedia framework and applications
*
* Copyright (c) 2001 - 2024 Members of the Gmerlin project
* http://github.com/bplaum
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
#include <config.h>
#include <string.h>
#include <pthread.h>
#include <uuid/uuid.h>
#include <gmerlin/parameter.h>
#include <gmerlin/bgmsg.h>
#include <gmerlin/state.h>
#include <gmerlin/translation.h>
#include <gmerlin/log.h>
#define LOG_DOMAIN "controllable"
#include <msgconn.h>
/* Controllable */
void
bg_controllable_init(bg_controllable_t * ctrl,
bg_msg_sink_t * cmd_sink, // Owned
bg_msg_hub_t * evt_hub) // Owned
{
memset(ctrl, 0, sizeof(*ctrl));
ctrl->cmd_sink = cmd_sink;
ctrl->evt_hub = evt_hub;
ctrl->evt_sink = bg_msg_hub_get_sink(ctrl->evt_hub);
}
void
bg_controllable_cleanup(bg_controllable_t * ctrl) // Owned
{
if(ctrl->priv && ctrl->cleanup)
ctrl->cleanup(ctrl->priv);
if(ctrl->cmd_sink)
bg_msg_sink_destroy(ctrl->cmd_sink);
if(ctrl->evt_hub)
bg_msg_hub_destroy(ctrl->evt_hub);
memset(ctrl, 0, sizeof(*ctrl));
}
void
bg_controllable_connect(bg_controllable_t * ctrl,
bg_control_t * c)
{
if(c->evt_sink)
bg_msg_hub_connect_sink(ctrl->evt_hub, c->evt_sink);
c->ctrl = ctrl;
}
void
bg_controllable_disconnect(bg_controllable_t * ctrl,
bg_control_t * c)
{
if(c->evt_sink)
bg_msg_hub_disconnect_sink(ctrl->evt_hub, c->evt_sink);
c->ctrl = NULL;
}
typedef struct
{
gavl_msg_t * req;
gavl_handle_msg_func cb;
void * data;
} function_context_t;
static int handle_msg_function(void * data, gavl_msg_t * msg)
{
const char * var;
function_context_t * ctx = data;
// fprintf(stderr, "handle_msg_function\n");
// gavl_msg_dump(msg, 2);
if(!(var = gavl_dictionary_get_string(&msg->header, BG_FUNCTION_TAG)) ||
strcmp(var, gavl_dictionary_get_string(&ctx->req->header, BG_FUNCTION_TAG)))
return 1;
if(ctx->cb)
ctx->cb(ctx->data, msg);
if(gavl_msg_get_last(msg))
return 0;
else
return 1;
}
int bg_controllable_call_function(bg_controllable_t * c, gavl_msg_t * func,
gavl_handle_msg_func cb, void * data, int timeout)
{
int result = 0;
gavl_time_t delay_time = GAVL_TIME_SCALE / 50; // 20ms
bg_control_t ctrl;
function_context_t ctx;
gavl_timer_t * timer = gavl_timer_create();
memset(&ctrl, 0, sizeof(ctrl));
memset(&ctx, 0, sizeof(ctx));
ctx.req = func;
ctx.cb = cb;
ctx.data = data;
bg_msg_add_function_tag(func);
bg_control_init(&ctrl, bg_msg_sink_create(handle_msg_function, &ctx, 0));
bg_controllable_connect(c, &ctrl);
bg_msg_sink_put_copy(ctrl.cmd_sink, func);
gavl_timer_start(timer);
while(1)
{
if(c->ping_func)
c->ping_func(c->ping_data);
if(!bg_msg_sink_iteration(ctrl.evt_sink))
{
result = 1;
break;
}
if((gavl_timer_get(timer)*1000) / GAVL_TIME_SCALE > timeout)
{
gavl_log(GAVL_LOG_ERROR, LOG_DOMAIN, "Timeout expired while waiting for function result");
break;
}
if(!bg_msg_sink_get_num(ctrl.evt_sink))
gavl_time_delay(&delay_time);
}
gavl_timer_destroy(timer);
bg_controllable_disconnect(c, &ctrl);
bg_control_cleanup(&ctrl);
return result;
}
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