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/*
* libdvbfe - a DVB frontend library
*
* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
*
* This library 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; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef LIBDVBFE_H
#define LIBDVBFE_H 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <stdint.h>
/**
* The types of frontend we support.
*/
typedef enum dvbfe_type {
DVBFE_TYPE_DVBS,
DVBFE_TYPE_DVBC,
DVBFE_TYPE_DVBT,
DVBFE_TYPE_ATSC,
} dvbfe_type_t;
typedef enum dvbfe_polarization {
DVBFE_POLARIZATION_H,
DVBFE_POLARIZATION_V,
DVBFE_POLARIZATION_L,
DVBFE_POLARIZATION_R,
} dvbfe_polarization_t;
typedef enum dvbfe_spectral_inversion {
DVBFE_INVERSION_OFF,
DVBFE_INVERSION_ON,
DVBFE_INVERSION_AUTO
} dvbfe_spectral_inversion_t;
typedef enum dvbfe_code_rate {
DVBFE_FEC_NONE,
DVBFE_FEC_1_2,
DVBFE_FEC_2_3,
DVBFE_FEC_3_4,
DVBFE_FEC_4_5,
DVBFE_FEC_5_6,
DVBFE_FEC_6_7,
DVBFE_FEC_7_8,
DVBFE_FEC_8_9,
DVBFE_FEC_AUTO
} dvbfe_code_rate_t;
typedef enum dvbfe_dvbt_const {
DVBFE_DVBT_CONST_QPSK,
DVBFE_DVBT_CONST_QAM_16,
DVBFE_DVBT_CONST_QAM_32,
DVBFE_DVBT_CONST_QAM_64,
DVBFE_DVBT_CONST_QAM_128,
DVBFE_DVBT_CONST_QAM_256,
DVBFE_DVBT_CONST_AUTO
} dvbfe_dvbt_const_t;
typedef enum dvbfe_dvbc_mod {
DVBFE_DVBC_MOD_QAM_16,
DVBFE_DVBC_MOD_QAM_32,
DVBFE_DVBC_MOD_QAM_64,
DVBFE_DVBC_MOD_QAM_128,
DVBFE_DVBC_MOD_QAM_256,
DVBFE_DVBC_MOD_AUTO,
} dvbfe_dvbc_mod_t;
typedef enum dvbfe_atsc_mod {
DVBFE_ATSC_MOD_QAM_64,
DVBFE_ATSC_MOD_QAM_256,
DVBFE_ATSC_MOD_VSB_8,
DVBFE_ATSC_MOD_VSB_16,
DVBFE_ATSC_MOD_AUTO
} dvbfe_atsc_mod_t;
typedef enum dvbfe_dvbt_transmit_mode {
DVBFE_DVBT_TRANSMISSION_MODE_2K,
DVBFE_DVBT_TRANSMISSION_MODE_8K,
DVBFE_DVBT_TRANSMISSION_MODE_AUTO
} dvbfe_dvbt_transmit_mode_t;
typedef enum dvbfe_dvbt_bandwidth {
DVBFE_DVBT_BANDWIDTH_8_MHZ,
DVBFE_DVBT_BANDWIDTH_7_MHZ,
DVBFE_DVBT_BANDWIDTH_6_MHZ,
DVBFE_DVBT_BANDWIDTH_AUTO
} dvbfe_dvbt_bandwidth_t;
typedef enum dvbfe_dvbt_guard_interval {
DVBFE_DVBT_GUARD_INTERVAL_1_32,
DVBFE_DVBT_GUARD_INTERVAL_1_16,
DVBFE_DVBT_GUARD_INTERVAL_1_8,
DVBFE_DVBT_GUARD_INTERVAL_1_4,
DVBFE_DVBT_GUARD_INTERVAL_AUTO
} dvbfe_dvbt_guard_interval_t;
typedef enum dvbfe_dvbt_hierarchy {
DVBFE_DVBT_HIERARCHY_NONE,
DVBFE_DVBT_HIERARCHY_1,
DVBFE_DVBT_HIERARCHY_2,
DVBFE_DVBT_HIERARCHY_4,
DVBFE_DVBT_HIERARCHY_AUTO
} dvbfe_dvbt_hierarchy_t;
/**
* Structure used to store and communicate frontend parameters.
*/
struct dvbfe_parameters {
uint32_t frequency;
dvbfe_spectral_inversion_t inversion;
union {
struct {
uint32_t symbol_rate;
dvbfe_code_rate_t fec_inner;
dvbfe_polarization_t polarization;
} dvbs;
struct {
uint32_t symbol_rate;
dvbfe_code_rate_t fec_inner;
dvbfe_dvbc_mod_t modulation;
} dvbc;
struct {
dvbfe_dvbt_bandwidth_t bandwidth;
dvbfe_code_rate_t code_rate_HP;
dvbfe_code_rate_t code_rate_LP;
dvbfe_dvbt_const_t constellation;
dvbfe_dvbt_transmit_mode_t transmission_mode;
dvbfe_dvbt_guard_interval_t guard_interval;
dvbfe_dvbt_hierarchy_t hierarchy_information;
} dvbt;
struct {
dvbfe_atsc_mod_t modulation;
} atsc;
} u;
};
/**
* Mask of values used in the dvbfe_get_info() call.
*/
typedef enum dvbfe_info_mask {
DVBFE_INFO_LOCKSTATUS = 0x01,
DVBFE_INFO_FEPARAMS = 0x02,
DVBFE_INFO_BER = 0x04,
DVBFE_INFO_SIGNAL_STRENGTH = 0x08,
DVBFE_INFO_SNR = 0x10,
DVBFE_INFO_UNCORRECTED_BLOCKS = 0x20,
} dvbfe_info_mask_t;
/**
* Structure containing values used by the dvbfe_get_info() call.
*/
struct dvbfe_info {
dvbfe_type_t type; /* always retrieved */
const char *name; /* always retrieved */
unsigned int signal : 1; /* } DVBFE_INFO_LOCKSTATUS */
unsigned int carrier : 1; /* } */
unsigned int viterbi : 1; /* } */
unsigned int sync : 1; /* } */
unsigned int lock : 1; /* } */
struct dvbfe_parameters feparams; /* DVBFE_INFO_FEPARAMS */
uint32_t ber; /* DVBFE_INFO_BER */
uint16_t signal_strength; /* DVBFE_INFO_SIGNAL_STRENGTH */
uint16_t snr; /* DVBFE_INFO_SNR */
uint32_t ucblocks; /* DVBFE_INFO_UNCORRECTED_BLOCKS */
};
/**
* Frontend handle datatype.
*/
typedef void *dvbfe_handle_t;
/**
* Open a DVB frontend.
*
* @param adapter DVB adapter ID.
* @param frontend Frontend ID of that adapter to open.
* @param readonly If 1, frontend will be opened in readonly mode only.
* @return A handle on success, or NULL on failure.
*/
extern dvbfe_handle_t dvbfe_open(int adapter, int frontend, int readonly);
/**
* Close a DVB frontend.
*
* @param fehandle Handle opened with dvbfe_open().
*/
extern void dvbfe_close(dvbfe_handle_t handle);
/**
* Set the frontend tuning parameters.
*
* @param fehandle Handle opened with dvbfe_open().
* @param params Params to set.
* @param timeout <0 => wait forever for lock. 0=>return immediately, >0=>
* number of milliseconds to wait for a lock.
* @return 0 on locked (or if timeout==0 and everything else worked), or
* nonzero on failure (including no lock).
*/
extern int dvbfe_set(dvbfe_handle_t fehandle, struct dvbfe_parameters *params, int timeout);
/**
* Call this function regularly from a loop to maintain the frontend lock.
*
* @param fehandle Handle opened with dvbfe_open().
*/
extern void dvbfe_poll(dvbfe_handle_t fehandle);
/**
* Retrieve information about the frontend.
*
* @param fehandle Handle opened with dvbfe_open().
* @param querymask ORed bitmask of desired DVBFE_INFO_* values.
* @param result Where to put the retrieved results.
* @return ORed bitmask of DVBFE_INFO_* indicating which values were read successfully.
*/
extern int dvbfe_get_info(dvbfe_handle_t fehandle, dvbfe_info_mask_t querymask, struct dvbfe_info *result);
/**
* Execute a DISEQC command string.
*
* A diseqc command consists of a sequence of the following codes, separated by
* whitespace:
* Simple commands:
* t - turn 22kHz tone off.
* T - turn 22kHz tone on.
* _ - set voltage to 0v (i.e. off).
* v - set voltage to 13v.
* V - set voltage to 18v.
* + - Enable high LNB voltage.
* - - Disable high LNB voltage.
* A - send DISEQC mini command A.
* B - send DISEQC mini command B.
* Wii - Delay for ii milliseconds.
*
* Extended commands:
* .dishnetworks(<value>) - Send a dish networks legacy command <value>
* .D(<value> ...) - Send a raw diseqc master command. The command may be up
* to 6 bytes long.
* .Dband(<addr> <lo|hi>) - Set frequency band hi or lo.
* .Dpolarisation(<addr> <V|H|L|R>) - Set polarisation.
* .Dsatellite_position(<addr> <A|B>) - Set "satellite position" input switch.
* .Dswitch_option(<addr> <A|B>) - Set "switch option" input switch.
* .Dport_pins(<addr> <mask> <value>) - Set all input switches. Mask and value
* are hex-ascii 8 bit bytes. Only bits with a corresponding '1' in mask
* will be changed.
* .Dgoto_preset(<addr> <index>) - Set a positioner to a preset index (integer)
* .Dgoto_angle(<addr> <angle>) - Set a positioner to a given angle
* (e.g. 49.6). The angle may range between -180 to 496. It may include a
* fractional part.
*
* All integer values use standard notation - no prefix=>decimal, 0x=>hex etc.
*
* Set <addr> to 0 if you just have a simple DISEQC setup (e.g. one switch). See
* the DISEQC specification at http://www.eutelsat.org/ for full information.
*
* Comments begin with '#' - any characters after this will be ignored
* to the end of the line.
*
* Examples:
* S-19.2E 11700000 V 9750000 t v W15 .D(E0 10 38 F0) W15 A W15 t
* S-19.2E 99999999 V 10600000 t v W15 .D(E0 10 38 F1) W15 A W15 T
* S-19.2E 11700000 H 9750000 t V W15 .D(E0 10 38 F2) W15 A W15 t
* S-19.2E 99999999 H 10600000 t V W15 .D(E0 10 38 F3) W15 A W15 T
*
* @param fehandle Handle opened with dvbfe_open().
* @param command Command to execute.
* @return 0 on success, nonzero on failure.
*/
extern int dvbfe_diseqc_command(dvbfe_handle_t fehandle, char *command);
/**
* Read a DISEQC response from the frontend.
*
* @param fehandle Handle opened with dvbfe_open().
* @param timeout Timeout for DISEQC response.
* @param buf Buffer to store response in.
* @param len Number of bytes in buffer.
* @return >= 0 on success (number of received bytes), <0 on failure.
*/
extern int dvbfe_diseqc_read(dvbfe_handle_t fehandle, int timeout, unsigned char *buf, unsigned int len);
#ifdef __cplusplus
}
#endif
#endif // LIBDVBFE_H
|
