/usr/include/libdvbv5/desc_extension.h is in libdvbv5-dev 1.10.0-1.
This file is owned by root:root, with mode 0o644.
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* Copyright (c) 2013-2014 - Mauro Carvalho Chehab <m.chehab@samsung.com>
*
* 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 version 2
* 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 General Public License for more details.
*
* You should have received a copy of the GNU 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_extension.h
* @ingroup descriptors
* @brief Provides the descriptors for the extension descriptor.
* The extension descriptor is used to extend the 8-bit namespace
* of the descriptor_tag field.
* @copyright GNU General Public License version 2 (GPLv2)
* @author Mauro Carvalho Chehab
*
* @par Relevant specs
* The descriptor described herein is defined at:
*
* @see
* - ETSI EN 300 468 V1.11.1
*
* @par Bug Report
* Please submit bug reports and patches to linux-media@vger.kernel.org
*/
#ifndef _EXTENSION_DESC_H
#define _EXTENSION_DESC_H
#include <libdvbv5/descriptors.h>
struct dvb_v5_fe_parms;
/**
* @enum extension_descriptors
* @brief List containing all extended descriptors used by Digital TV MPEG-TS
* as defined at ETSI EN 300 468 V1.11.1
* @ingroup descriptors
*
* @var image_icon_descriptor
* @brief image icon descriptor
*
* @var cpcm_delivery_signalling_descriptor
* @brief Content Protection/Copy Management (CPCM) delivery signalling
* descriptor
*
* @var CP_descriptor
* @brief Content Protection descriptor
*
* @var CP_identifier_descriptor
* @brief Content Protection identifier descriptor
*
* @var T2_delivery_system_descriptor
* @brief DVB-T2 delivery system descriptor
*
* @var SH_delivery_system_descriptor
* @brief DVB-SH delivery system descriptor
*
* @var supplementary_audio_descriptor
* @brief supplementary audio descriptor
*
* @var network_change_notify_descriptor
* @brief network change notify descriptor
*
* @var message_descriptor
* @brief message descriptor
*
* @var target_region_descriptor
* @brief target region descriptor
*
* @var target_region_name_descriptor
* @brief target region name descriptor
*
* @var service_relocated_descriptor
* @brief service relocated descriptor
*/
enum extension_descriptors {
image_icon_descriptor = 0x00,
cpcm_delivery_signalling_descriptor = 0x01,
CP_descriptor = 0x02,
CP_identifier_descriptor = 0x03,
T2_delivery_system_descriptor = 0x04,
SH_delivery_system_descriptor = 0x05,
supplementary_audio_descriptor = 0x06,
network_change_notify_descriptor = 0x07,
message_descriptor = 0x08,
target_region_descriptor = 0x09,
target_region_name_descriptor = 0x0a,
service_relocated_descriptor = 0x0b,
};
/**
* @struct dvb_extension_descriptor
* @ingroup descriptors
* @brief Structure containing the extended descriptors
*
* @param type Descriptor type
* @param length Length of the descriptor
* @param next pointer to the dvb_desc descriptor
* @param extension_code extension code
* @param descriptor pointer to struct dvb_desc
*/
struct dvb_extension_descriptor {
uint8_t type;
uint8_t length;
struct dvb_desc *next;
uint8_t extension_code;
struct dvb_desc *descriptor;
} __attribute__((packed));
/**
* @brief Function prototype for the extended descriptors parsing init code
* @ingroup dvb_table
*
* @param parms Struct dvb_v5_fe_parms pointer
* @param buf buffer with the content of the descriptor
* @param ext struct dvb_extension_descriptor pointer
* @param desc struct dvb_desc pointer
*/
typedef int (*dvb_desc_ext_init_func) (struct dvb_v5_fe_parms *parms,
const uint8_t *buf,
struct dvb_extension_descriptor *ext,
void *desc);
/**
* @brief Function prototype for the extended descriptors parsing print code
* @ingroup dvb_table
*
* @param parms Struct dvb_v5_fe_parms pointer
* @param buf buffer with the content of the descriptor
* @param ext struct dvb_extension_descriptor pointer
* @param desc struct dvb_desc pointer
*/
typedef void (*dvb_desc_ext_print_func)(struct dvb_v5_fe_parms *parms,
const struct dvb_extension_descriptor *ext,
const void *desc);
/**
* @brief Function prototype for the extended descriptors parsing free code
* @ingroup dvb_table
*
* @param desc struct dvb_desc pointer
*/
typedef void (*dvb_desc_ext_free_func) (const void *desc);
/**
* @struct dvb_ext_descriptor
* @ingroup descriptors
* @brief Structure that describes the parser functions for the extended
* descriptors. Works on a similar way as struct dvb_descriptor.
*
* @param name name of the descriptor
* @param init init dvb_desc_ext_init_func pointer
* @param print print dvb_desc_ext_print_func pointer
* @param free free dvb_desc_ext_free_func pointer
* @param size size of the descriptor
*/
struct dvb_ext_descriptor {
const char *name;
dvb_desc_ext_init_func init;
dvb_desc_ext_print_func print;
dvb_desc_ext_free_func free;
ssize_t size;
};
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Initializes and parses the extended 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 allocates a the descriptor and fills the fields inside
* the struct. It also makes sure that all fields will follow the CPU
* endianness. Due to that, the content of the buffer may change.
*
* @return On success, it returns the size of the allocated struct.
* A negative value indicates an error.
*/
int dvb_extension_descriptor_init(struct dvb_v5_fe_parms *parms,
const uint8_t *buf, struct dvb_desc *desc);
/**
* @brief Prints the content of the extended descriptor
* @ingroup descriptors
*
* @param parms struct dvb_v5_fe_parms pointer to the opened device
* @param desc pointer to struct dvb_desc
*/
void dvb_extension_descriptor_print(struct dvb_v5_fe_parms *parms,
const struct dvb_desc *desc);
/**
* @brief Frees all data allocated by the extended descriptor
* @ingroup descriptors
*
* @param desc pointer to struct dvb_desc to be freed
*/
void dvb_extension_descriptor_free(struct dvb_desc *desc);
#ifdef __cplusplus
}
#endif
#endif
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