/usr/include/libdvbv5/desc_sat.h is in libdvbv5-dev 1.10.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2011-2014 - 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 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_sat.h
* @ingroup descriptors
* @brief Provides the descriptors for the satellite delivery system descriptor
* @copyright GNU General Public License version 2 (GPLv2)
* @author Mauro Carvalho Chehab
* @author Andre Roth
*
* @par Relevant specs
* The descriptor described herein is defined at:
* - ETSI EN 300 468 V1.11.1
*
* @par Bug Report
* Please submit bug reports and patches to linux-media@vger.kernel.org
*/
#ifndef _SAT_H
#define _SAT_H
#include <libdvbv5/descriptors.h>
/**
* @struct dvb_desc_sat
* @ingroup descriptors
* @brief Structure containing the satellite delivery system descriptor
*
* @param type descriptor tag
* @param length descriptor length
* @param next pointer to struct dvb_desc
* @param frequency frequency in kHz
* @param orbit orbital position in degrees (multiplied by 10)
* @param west_east west east flag. 0 = west, 1 = east
* @param polarization polarization. 0 = horizontal, 1 = vertical,
* 2 = left, 3 = right.
* @param roll_off roll off alpha factor. 0 = 0.35, 1 = 0.25,
* 2 = 0.20, 3 = reserved.
* @param modulation_system modulation system. 0 = DVB-S, 1 = DVB-S2.
* @param modulation_type modulation type. 0 = auto, 1 = QPSK, 2 = 8PSK,
* 3 = 16-QAM (only for DVB-S2).
* @param symbol_rate symbol rate in Kbauds.
* @param fec inner FEC (convolutional code)
*/
struct dvb_desc_sat {
uint8_t type;
uint8_t length;
struct dvb_desc *next;
uint32_t frequency;
uint16_t orbit;
uint8_t modulation_type:2;
uint8_t modulation_system:1;
uint8_t roll_off:2;
uint8_t polarization:2;
uint8_t west_east:1;
union {
uint32_t bitfield;
struct {
uint32_t fec:4;
uint32_t symbol_rate:28;
} __attribute__((packed));
} __attribute__((packed));
} __attribute__((packed));
struct dvb_v5_fe_parms;
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Initializes and parses the satellite delivery system 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_sat_init(struct dvb_v5_fe_parms *parms,
const uint8_t *buf, struct dvb_desc *desc);
/**
* @brief Prints the content of the satellite delivery system 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_sat_print(struct dvb_v5_fe_parms *parms,
const struct dvb_desc *desc);
/**
* @brief converts from the descriptor's FEC into enum fe_code_rate,
* as defined by DVBv5 API.
*/
extern const unsigned dvbs_dvbc_dvbs_freq_inner[];
/**
* @brief converts from the descriptor's polarization into
* enum dvb_sat_polarization, as defined at dvb-v5-std.h.
*/
extern const unsigned dvbs_polarization[];
/**
* @brief converts from the descriptor's rolloff into enum fe_rolloff,
* as defined by DVBv5 API.
*/
extern const unsigned dvbs_rolloff[];
/**
* @brief converts from the descriptor's modulation into enum fe_modulation,
* as defined by DVBv5 API.
*/
extern const unsigned dvbs_modulation[];
#ifdef __cplusplus
}
#endif
#endif
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