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/*
* Copyright (c) 2011-2012 - Mauro Carvalho Chehab
* Copyright (c) 2012 - Andre Roth <neolynx@gmail.com>
*
* This program 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 version 2.1 of the License.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
*/
/**
* @file desc_hierarchy.h
* @ingroup descriptors
* @brief Provides the descriptors for the hierarchy descriptor
* @copyright GNU Lesser General Public License version 2.1 (LGPLv2.1)
* @author Mauro Carvalho Chehab
* @author Andre Roth
*
* @par Relevant specs
* The descriptor described herein is defined at:
* - ISO/IEC 13818-1
*
* @see
*
* @par Bug Report
* Please submit bug reports and patches to linux-media@vger.kernel.org
*/
#ifndef _HIERARCHY_H
#define _HIERARCHY_H
#include <libdvbv5/descriptors.h>
/**
* @struct dvb_desc_hierarchy
* @ingroup descriptors
* @brief Structure containing the hierarchy descriptor
*
* @param type descriptor tag
* @param length descriptor length
* @param next pointer to struct dvb_desc
* @param hierarchy_type hierarchy type
* @param layer hierarchy layer index
* @param embedded_layer hierarchy embedded layer index
* @param channel hierarchy channel
*/
struct dvb_desc_hierarchy {
uint8_t type;
uint8_t length;
struct dvb_desc *next;
uint8_t hierarchy_type:4;
uint8_t reserved:4;
uint8_t layer:6;
uint8_t reserved2:2;
uint8_t embedded_layer:6;
uint8_t reserved3:2;
uint8_t channel:6;
uint8_t reserved4:2;
} __attribute__((packed));
struct dvb_v5_fe_parms;
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Initializes and parses the hierarchy descriptor
* @ingroup descriptors
*
* @param parms struct dvb_v5_fe_parms pointer to the opened device
* @param buf buffer containing the descriptor's raw data
* @param desc pointer to struct dvb_desc to be allocated and filled
*
* This function initializes and makes sure that all fields will follow the CPU
* endianness. Due to that, the content of the buffer may change.
*
* Currently, no memory is allocated internally.
*
* @return On success, it returns the size of the allocated struct.
* A negative value indicates an error.
*/
int dvb_desc_hierarchy_init (struct dvb_v5_fe_parms *parms,
const uint8_t *buf, struct dvb_desc *desc);
/**
* @brief Prints the content of the hierarchy descriptor
* @ingroup descriptors
*
* @param parms struct dvb_v5_fe_parms pointer to the opened device
* @param desc pointer to struct dvb_desc
*/
void dvb_desc_hierarchy_print(struct dvb_v5_fe_parms *parms,
const struct dvb_desc *desc);
#ifdef __cplusplus
}
#endif
#endif
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