vct.h

Go to the documentation of this file.

/*
 * Copyright (c) 2013 - Mauro Carvalho Chehab <mchehab@kernel.org>
 * Copyright (c) 2013 - 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
 *
 */
 
#ifndef _VCT_H
#define _VCT_H
 
#include <stdint.h>
#include <unistd.h> /* ssize_t */
 
#include <libdvbv5/atsc_header.h>
 
#define ATSC_TABLE_TVCT     0xc8
#define ATSC_TABLE_CVCT     0xc9
#define ATSC_TABLE_VCT_PID  0x1ffb
 
struct atsc_table_vct_channel {
        uint16_t        __short_name[7];
 
        union {
                uint32_t bitfield1;
                struct {
                        uint32_t        modulation_mode:8;
                        uint32_t        minor_channel_number:10;
                        uint32_t        major_channel_number:10;
                        uint32_t        reserved1:4;
                } __attribute__((packed));
        } __attribute__((packed));
 
        uint32_t        carrier_frequency;
        uint16_t        channel_tsid;
        uint16_t        program_number;
        union {
                uint16_t bitfield2;
                struct {
                        uint16_t        service_type:6;
                        uint16_t        reserved2:3;
                        uint16_t        hide_guide:1;
                        uint16_t        out_of_band:1;  /* CVCT only */
                        uint16_t        path_select:1;  /* CVCT only */
                        uint16_t        hidden:1;
                        uint16_t        access_controlled:1;
                        uint16_t        ETM_location:2;
 
                } __attribute__((packed));
        } __attribute__((packed));
 
        uint16_t source_id;
        union {
                uint16_t bitfield3;
                struct {
                        uint16_t descriptors_length:10;
                        uint16_t reserved3:6;
                } __attribute__((packed));
        } __attribute__((packed));
 
        /*
         * Everything after atsc_table_vct_channel::descriptor (including it)
         * won't be bit-mapped to the data parsed from the MPEG TS. So,
         * metadata are added there
         */
        struct dvb_desc *descriptor;
        struct atsc_table_vct_channel *next;
 
        /* The channel_short_name is converted to locale charset by vct.c */
 
        char short_name[32];
} __attribute__((packed));
 
struct atsc_table_vct {
        struct dvb_table_header header;
        uint8_t  protocol_version;
 
        uint8_t num_channels_in_section;
 
        struct atsc_table_vct_channel *channel;
        struct dvb_desc *descriptor;
} __attribute__((packed));
 
union atsc_table_vct_descriptor_length {
        uint16_t bitfield;
        struct {
                uint16_t descriptor_length:10;
                uint16_t reserved:6;
        } __attribute__((packed));
} __attribute__((packed));
 
 #define atsc_vct_channel_foreach(_channel, _vct) \
        if (_vct && _vct->channel) \
                for (struct atsc_table_vct_channel *_channel = _vct->channel; _channel; _channel = _channel->next) \
 
struct dvb_v5_fe_parms;
 
#ifdef __cplusplus
extern "C" {
#endif
 
ssize_t atsc_table_vct_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf,
                            ssize_t buflen, struct atsc_table_vct **table);
void atsc_table_vct_free(struct atsc_table_vct *table);
void atsc_table_vct_print(struct dvb_v5_fe_parms *parms,
                          struct atsc_table_vct *table);
 
#ifdef __cplusplus
}
#endif
 
#endif