/*
* Copyright (C) 2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango[dot]org>
*	
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO 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 3 of the License, or
* (at your option) any later version.
*	
* DOUBANGO 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 DOUBANGO.
*
*/

/**@file tmedia_jitterbuffer.c
 * @brief Audio/Video  JitterBuffer plugin
 *
 * @author Mamadou Diop <diopmamadou(at)doubango[dot]org>
 */
#include "tinymedia/tmedia_jitterbuffer.h"

#include "tsk_debug.h"

/* pointer to all registered jitter_buffers */
static const tmedia_jitterbuffer_plugin_def_t* __tmedia_jitterbuffer_plugins[TMED_JITTER_BUFFER_MAX_PLUGINS] = {0};

int tmedia_jitterbuffer_init(tmedia_jitterbuffer_t* self)
{
	if(!self){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}
	return 0;
}

int tmedia_jitterbuffer_set(tmedia_jitterbuffer_t *self, const tmedia_param_t* param)
{
	if(!self || !self->plugin || !param){
		TSK_DEBUG_ERROR("Invalid parameter");
		return 0;
	}
	return self->plugin->set ? self->plugin->set(self, param) : 0;
}

int tmedia_jitterbuffer_open(tmedia_jitterbuffer_t* self, uint32_t frame_duration, uint32_t rate)
{
	int ret;

	if(!self || !self->plugin || !self->plugin->open){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}
	if(self->opened){
		TSK_DEBUG_WARN("JitterBuffer already opened");
		return 0;
	}
	
	if((ret = self->plugin->open(self, frame_duration, rate))){
		TSK_DEBUG_ERROR("Failed to open [%s] jitterbufferr", self->plugin->desc);
		return ret;
	}
	else{
		self->opened = tsk_true;
		return 0;
	}
}

int tmedia_jitterbuffer_tick(tmedia_jitterbuffer_t* self)
{
	if(!self || !self->plugin || !self->plugin->tick){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}

	if(!self->opened){
		TSK_DEBUG_ERROR("JitterBuffer not opened");
		return -1;
	}

	return self->plugin->tick(self);
}

int tmedia_jitterbuffer_put(tmedia_jitterbuffer_t* self, void* data, tsk_size_t data_size, const tsk_object_t* proto_hdr)
{
	if(!self || !self->plugin || !self->plugin->put){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}

	if(!self->opened){
		TSK_DEBUG_ERROR("JitterBuffer not opened");
		return -1;
	}

	return self->plugin->put(self, data, data_size, proto_hdr);
}

tsk_size_t tmedia_jitterbuffer_get(tmedia_jitterbuffer_t* self, void* out_data, tsk_size_t out_size)
{
	if(!self || !self->plugin || !self->plugin->get){
		TSK_DEBUG_ERROR("Invalid parameter");
		return 0;
	}

	if(!self->opened){
		TSK_DEBUG_ERROR("JitterBuffer not opened");
		return 0;
	}

	return self->plugin->get(self, out_data, out_size);
}

int tmedia_jitterbuffer_reset(tmedia_jitterbuffer_t* self)
{
	if(!self || !self->plugin){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}
	if(self->opened && self->plugin->reset){
		return self->plugin->reset(self);
	}

	return 0;
}

int tmedia_jitterbuffer_close(tmedia_jitterbuffer_t* self)
{
	if(!self || !self->plugin){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}
	if(!self->opened){
		TSK_DEBUG_WARN("JitterBuffer not opened");
		return 0;
	}

	if(self->plugin->close){
		int ret;

		if((ret = self->plugin->close(self))){
			TSK_DEBUG_ERROR("Failed to close [%s] jitterbufferr", self->plugin->desc);
			return ret;
		}
		else{
			self->opened = tsk_false;
			return 0;
		}
	}
	else{
		self->opened = tsk_false;
		return 0;
	}
}

int tmedia_jitterbuffer_deinit(tmedia_jitterbuffer_t* self)
{
	if(!self){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}

	if(self->opened){
		tmedia_jitterbuffer_close(self);
	}

	return 0;
}

tmedia_jitterbuffer_t* tmedia_jitterbuffer_create(tmedia_type_t type)
{
	tmedia_jitterbuffer_t* jitter_buffer = tsk_null;
	const tmedia_jitterbuffer_plugin_def_t* plugin;
	tsk_size_t i = 0;

	while((i < TMED_JITTER_BUFFER_MAX_PLUGINS) && (plugin = __tmedia_jitterbuffer_plugins[i++])){
		if(plugin->objdef && plugin->type == type){
			if((jitter_buffer = tsk_object_new(plugin->objdef))){
				/* initialize the newly created jitter_buffer */
				jitter_buffer->plugin = plugin;
				break;
			}
		}
	}

	return jitter_buffer;
}

int tmedia_jitterbuffer_plugin_register(const tmedia_jitterbuffer_plugin_def_t* plugin)
{
	tsk_size_t i;
	if(!plugin){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}

	/* add or replace the plugin */
	for(i = 0; i<TMED_JITTER_BUFFER_MAX_PLUGINS; i++){
		if(!__tmedia_jitterbuffer_plugins[i] || (__tmedia_jitterbuffer_plugins[i] == plugin)){
			__tmedia_jitterbuffer_plugins[i] = plugin;
			return 0;
		}
	}
	
	TSK_DEBUG_ERROR("There are already %d plugins.", TMED_JITTER_BUFFER_MAX_PLUGINS);
	return -2;
}

/**@ingroup tmedia_jitterbuffer_group
* UnRegisters a jitter_buffer plugin.
* @param plugin the definition of the plugin.
* @retval Zero if succeed and non-zero error code otherwise.
*/
int tmedia_jitterbuffer_plugin_unregister(const tmedia_jitterbuffer_plugin_def_t* plugin)
{
	tsk_size_t i;
	tsk_bool_t found = tsk_false;
	if(!plugin){
		TSK_DEBUG_ERROR("Invalid Parameter");
		return -1;
	}

	/* find the plugin to unregister */
	for(i = 0; i<TMED_JITTER_BUFFER_MAX_PLUGINS && __tmedia_jitterbuffer_plugins[i]; i++){
		if(__tmedia_jitterbuffer_plugins[i] == plugin){
			__tmedia_jitterbuffer_plugins[i] = tsk_null;
			found = tsk_true;
			break;
		}
	}

	/* compact */
	if(found){
		for(; i<(TMED_JITTER_BUFFER_MAX_PLUGINS - 1); i++){
			if(__tmedia_jitterbuffer_plugins[i+1]){
				__tmedia_jitterbuffer_plugins[i] = __tmedia_jitterbuffer_plugins[i+1];
			}
			else{
				break;
			}
		}
		__tmedia_jitterbuffer_plugins[i] = tsk_null;
	}
	return (found ? 0 : -2);
}

int tmedia_jitterbuffer_plugin_unregister_by_type(tmedia_type_t type)
{
	tsk_size_t i;
	tsk_bool_t found = tsk_false;

	/* find the plugin to unregister */
	for(i = 0; i<TMED_JITTER_BUFFER_MAX_PLUGINS && __tmedia_jitterbuffer_plugins[i]; i++){
		if((__tmedia_jitterbuffer_plugins[i]->type & type) == __tmedia_jitterbuffer_plugins[i]->type){
			__tmedia_jitterbuffer_plugins[i] = tsk_null;
			found = tsk_true;
			break;
		}
	}

	/* compact */
	if(found){
		for(; i<(TMED_JITTER_BUFFER_MAX_PLUGINS - 1); i++){
			if(__tmedia_jitterbuffer_plugins[i+1]){
				__tmedia_jitterbuffer_plugins[i] = __tmedia_jitterbuffer_plugins[i+1];
			}
			else{
				break;
			}
		}
		__tmedia_jitterbuffer_plugins[i] = tsk_null;
	}
	return (found ? 0 : -2);
}
