path: root/tinyMEDIA/src/content/tmedia_content.c

/*
* Copyright (C) 2009-2010 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango.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_content.c
 * @brief Base content object.
 *
 * @author Mamadou Diop <diopmamadou(at)doubango.org>
 *
 */
#include "tinymedia/content/tmedia_content.h"

#include "tsk_memory.h"
#include "tsk_string.h"
#include "tsk_debug.h"

#include <string.h>

/**@defgroup tmedia_content_group Contents
*/

typedef struct tmedia_content_plugin_entry_s
{
	const char* type;
	const tmedia_content_plugin_def_t* plugin;
}
tmedia_content_plugin_entry_t;

/* pointer to all registered contents */
tmedia_content_plugin_entry_t __tmedia_content_plugin_entries[TMEDIA_CONTENT_MAX_PLUGINS][1] = { tsk_null };


int tmedia_content_plugin_register(const char* type, const tmedia_content_plugin_def_t* plugin)
{
	tsk_size_t i;
	int a = sizeof(__tmedia_content_plugin_entries);
	if(!plugin || !plugin){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}

	/* add or replace the plugin */
	for(i = 0; i<TMEDIA_CONTENT_MAX_PLUGINS; i++){
		if(!__tmedia_content_plugin_entries[i]->plugin || (__tmedia_content_plugin_entries[i]->plugin == plugin && tsk_striequals(type, __tmedia_content_plugin_entries[i]->type))){
			__tmedia_content_plugin_entries[i]->type = type;
			__tmedia_content_plugin_entries[i]->plugin = plugin;
			return 0;
		}
	}
	

	TSK_DEBUG_ERROR("There are already %d plugins.", TMEDIA_CONTENT_MAX_PLUGINS);
	return -2;
}

int tmedia_content_plugin_unregister(const char* type, const tmedia_content_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<TMEDIA_CONTENT_MAX_PLUGINS && __tmedia_content_plugin_entries[i]->plugin; i++){
		if(__tmedia_content_plugin_entries[i]->plugin == plugin && tsk_striequals(type, __tmedia_content_plugin_entries[i]->type)){
			__tmedia_content_plugin_entries[i]->type = tsk_null,
			__tmedia_content_plugin_entries[i]->plugin = tsk_null;
			found = tsk_true;
			break;
		}
	}

	/* compact */
	if(found){
		for(; i<(TMEDIA_CONTENT_MAX_PLUGINS - 1); i++){
			if(__tmedia_content_plugin_entries[i+1]->plugin){
				__tmedia_content_plugin_entries[i]->type = __tmedia_content_plugin_entries[i+1]->type,
				__tmedia_content_plugin_entries[i]->plugin = __tmedia_content_plugin_entries[i+1]->plugin;
			}
			else{
				break;
			}
		}
		__tmedia_content_plugin_entries[i]->type = tsk_null,
		__tmedia_content_plugin_entries[i]->plugin = tsk_null;
	}
	return (found ? 0 : -2);
}

int tmedia_content_plugin_unregister_all()
{
	tsk_size_t i;
	for(i = 0; i<TMEDIA_CONTENT_MAX_PLUGINS && __tmedia_content_plugin_entries[i]->plugin; i++){
		__tmedia_content_plugin_entries[i]->type = tsk_null,
		__tmedia_content_plugin_entries[i]->plugin = tsk_null;
	}
	return 0;
}

tmedia_content_t* tmedia_content_create(const char* type)
{
	tmedia_content_t* content = tsk_null;
	const tmedia_content_plugin_entry_t* entry;
	tsk_size_t i = 0;

	while(i < TMEDIA_CONTENT_MAX_PLUGINS){
		entry = __tmedia_content_plugin_entries[i];
		if(!entry->plugin || !entry->type){
			break;
		}
		if(entry->plugin->objdef && tsk_striequals(entry->type, type)){
			if((content = tsk_object_new(entry->plugin->objdef))){
				content->plugin = entry->plugin;
				content->type = entry->type;
				return content;
			}
		}
		++i;
	}
	
	TSK_DEBUG_WARN("Failed to find content type (%s) will be added as dummy", type);
	if(tmedia_content_dummy_plugin_def_t){
		content = tsk_object_new(tmedia_content_dummy_plugin_def_t->objdef);
		content->plugin = tmedia_content_dummy_plugin_def_t;
		content->type = type;
	}

	return content;
}

tmedia_content_t* tmedia_content_parse(const void* data, tsk_size_t size, const char* type)
{
	tmedia_content_t* content = tmedia_content_create(type);
	if(content){
		if(content->plugin->parse){
			int ret;
			if((ret = content->plugin->parse(content, data, size))){
				TSK_DEBUG_ERROR("Failed to parse the content(%d)", ret);
				TSK_OBJECT_SAFE_FREE(content);
				return tsk_null;
			}
			return content;
		}
		else{
			TSK_DEBUG_ERROR("No parser function for this content (%s)", type);
			TSK_OBJECT_SAFE_FREE(content);
			return tsk_null;
		}
	}
	else{
		TSK_DEBUG_ERROR("Failed to to find content(%s)", type);
		return tsk_null;
	}
}

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

	return 0;
}

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

	return 0;
}

tsk_buffer_t* tmedia_content_get_data(tmedia_content_t* self)
{
	if(!self || !self->plugin){
		TSK_DEBUG_ERROR("Invalid parameter");
		return tsk_null;
	}
	return self->plugin->get_data(self);
}




static int tmedia_content_dummy_parse(tmedia_content_t* self, const void* in_data, tsk_size_t in_size)
{
	tmedia_content_dummy_t *dummy = TMEDIA_CONTENT_DUMMY(self);
	if(!dummy || dummy->data){
		TSK_DEBUG_ERROR("Invalid parameter");
		return -1;
	}

	dummy->data = tsk_buffer_create(in_data, in_size);
	return 0;
}

static tsk_buffer_t* tmedia_content_dummy_get_data(tmedia_content_t* self)
{
	return tsk_object_ref(TMEDIA_CONTENT_DUMMY(self)->data);
}






//=================================================================================================
//	object/plugin definitions
//
/* constructor */
static tsk_object_t* tmedia_content_dummy_ctor(tsk_object_t * self, va_list * app)
{
	tmedia_content_dummy_t *dummy = self;
	if(dummy){
		/* init base: called by tmedia_content_create() */
		/* init self */
	}
	return self;
}
/* destructor */
static tsk_object_t* tmedia_content_dummy_dtor(tsk_object_t * self)
{ 
	tmedia_content_dummy_t *dummy = self;
	if(dummy){
		/* deinit base */
		tmedia_content_deinit(TMEDIA_CONTENT(dummy));
		/* deinit self */
		TSK_OBJECT_SAFE_FREE(dummy->data);
	}

	return self;
}
/* object definition */
static const tsk_object_def_t tmedia_content_dummy_def_s = 
{
	sizeof(tmedia_content_dummy_t),
	tmedia_content_dummy_ctor, 
	tmedia_content_dummy_dtor,
	tsk_null, 
};
/* plugin definition*/
static const tmedia_content_plugin_def_t tmedia_content_dummy_plugin_def_s = 
{
	&tmedia_content_dummy_def_s,

	"dummy",
	tmedia_content_dummy_parse,
	tmedia_content_dummy_get_data
};
const tmedia_content_plugin_def_t *tmedia_content_dummy_plugin_def_t = &tmedia_content_dummy_plugin_def_s;



//=================================================================================================
//	media content header
//

tmedia_content_header_t* tmedia_content_header_create(const char* name, const char* value)
{
	tmedia_content_header_t* header = tsk_object_new(tmedia_content_header_def_t);
	const char* str;

	if(!header){
		TSK_DEBUG_ERROR("Failed to create new header object");
		return tsk_null;
	}
	header->name = tsk_strdup(name);
	if((str = strstr(value, ";"))){
		header->value = tsk_strndup(value, (str - value));
		header->params = tsk_params_fromstring((str + 1), ";", tsk_true);
	}
	else{
		header->value = tsk_strdup(value);
	}

	return header;
}

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

	TSK_FREE(self->name);
	TSK_FREE(self->value);
	TSK_OBJECT_SAFE_FREE(self->params);

	return 0;
}

char* tmedia_content_header_tostring(const tmedia_content_header_t* self)
{
	char* string = tsk_null;

	if(!self){
		TSK_DEBUG_ERROR("Invalid parameter");
		return tsk_null;
	}

	tsk_sprintf(&string, "%s: %s", self->name, self->value);
	if(self->params){
		const tsk_list_item_t* item;
		tsk_list_foreach(item, self->params){
			tsk_strcat_2(&string, ";%s=%s", TSK_PARAM(item->data)->name, TSK_PARAM(item->data)->value);
		}
	}
	
	return string;
}

/* constructor */
static tsk_object_t* tmedia_content_header_ctor(tsk_object_t * self, va_list * app)
{
	tmedia_content_header_t *header = self;
	if(header){
	}
	return self;
}
/* destructor */
static tsk_object_t* tmedia_content_header_dtor(tsk_object_t * self)
{ 
	tmedia_content_header_t *header = self;
	if(header){		
		tmedia_content_header_deinit(header);
	}

	return self;
}
/* object definition */
static const tsk_object_def_t tmedia_content_header_def_s = 
{
	sizeof(tmedia_content_header_t),
	tmedia_content_header_ctor, 
	tmedia_content_header_dtor,
	tsk_null, 
};
const tsk_object_def_t *tmedia_content_header_def_t = &tmedia_content_header_def_s;