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/*
* section and descriptor parser
*
* Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
* Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
*
* 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 _UCSI_DVB_SERVICE_DESCRIPTOR
#define _UCSI_DVB_SERVICE_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* Possible values for service_type.
*/
enum {
DVB_SERVICE_TYPE_DIGITAL_TV = 0x01,
DVB_SERVICE_TYPE_DIGITAL_RADIO = 0x02,
DVB_SERVICE_TYPE_TELETEXT = 0x03,
DVB_SERVICE_TYPE_NVOD_REF = 0x04,
DVB_SERVICE_TYPE_NVOD_TIMESHIFT = 0x05,
DVB_SERVICE_TYPE_MOSAIC = 0x06,
DVB_SERVICE_TYPE_PAL = 0x07,
DVB_SERVICE_TYPE_SECAM = 0x08,
DVB_SERVICE_TYPE_D_D2_MAC = 0x09,
DVB_SERVICE_TYPE_FM_RADIO = 0x0a,
DVB_SERVICE_TYPE_NTSC = 0x0b,
DVB_SERVICE_TYPE_DATA_BCAST = 0x0c,
DVB_SERVICE_TYPE_EN50221 = 0x0d,
DVB_SERVICE_TYPE_RCS_MAP = 0x0e,
DVB_SERVICE_TYPE_RCS_FLS = 0x0f,
DVB_SERVICE_TYPE_MHP = 0x10,
DVB_SERVICE_TYPE_MPEG2_HD_DIGITAL_TV = 0x11,
DVB_SERVICE_TYPE_ADVANCED_CODEC_SD_DIGITAL_TV = 0x16,
DVB_SERVICE_TYPE_ADVANCED_CODEC_SD_NVOD_TIMESHIFT = 0x17,
DVB_SERVICE_TYPE_ADVANCED_CODEC_SD_NVOD_REF = 0x18,
DVB_SERVICE_TYPE_ADVANCED_CODEC_HD_DIGITAL_TV = 0x19,
DVB_SERVICE_TYPE_ADVANCED_CODEC_HD_NVOD_TIMESHIFT = 0x1a,
DVB_SERVICE_TYPE_ADVANCED_CODEC_HD_NVOD_REF = 0x1b,
};
/**
* dvb_service_descriptor structure.
*/
struct dvb_service_descriptor {
struct descriptor d;
uint8_t service_type;
uint8_t service_provider_name_length;
/* uint8_t service_provider_name[] */
/* struct dvb_service_descriptor_part2 part2 */
} __ucsi_packed;
/**
* Second part of a dvb_service_descriptor following the variable length
* service_provider_name field.
*/
struct dvb_service_descriptor_part2 {
uint8_t service_name_length;
/* uint8_t service_name[] */
} __ucsi_packed;
/**
* Process a dvb_service_descriptor.
*
* @param d Generic descriptor pointer.
* @return dvb_service_descriptor pointer, or NULL on error.
*/
static inline struct dvb_service_descriptor*
dvb_service_descriptor_codec(struct descriptor* d)
{
struct dvb_service_descriptor *p =
(struct dvb_service_descriptor *) d;
struct dvb_service_descriptor_part2 *p2;
uint32_t pos = sizeof(struct dvb_service_descriptor) - 2;
uint32_t len = d->len;
if (pos > len)
return NULL;
pos += p->service_provider_name_length;
if (pos > len)
return NULL;
p2 = (struct dvb_service_descriptor_part2*) ((uint8_t*) d + 2 + pos);
pos += sizeof(struct dvb_service_descriptor_part2);
if (pos > len)
return NULL;
pos += p2->service_name_length;
if (pos != len)
return NULL;
return p;
}
/**
* Accessor for the service_provider_name field of a dvb_service_descriptor.
*
* @param d dvb_service_descriptor pointer.
* @return Pointer to the service_provider_name field.
*/
static inline uint8_t *
dvb_service_descriptor_service_provider_name(struct dvb_service_descriptor *d)
{
return (uint8_t *) d + sizeof(struct dvb_service_descriptor);
}
/**
* Accessor for the second part of a dvb_service_descriptor.
*
* @param d dvb_service_descriptor pointer.
* @return dvb_service_descriptor_part2 pointer.
*/
static inline struct dvb_service_descriptor_part2 *
dvb_service_descriptor_part2(struct dvb_service_descriptor *d)
{
return (struct dvb_service_descriptor_part2 *)
((uint8_t*) d + sizeof(struct dvb_service_descriptor) +
d->service_provider_name_length);
}
/**
* Accessor for the service_name field of a dvb_service_descriptor_part2.
*
* @param d dvb_service_descriptor_part2 pointer.
* @return Pointer to the service_name field.
*/
static inline uint8_t *
dvb_service_descriptor_service_name(struct dvb_service_descriptor_part2 *d)
{
return (uint8_t *) d + sizeof(struct dvb_service_descriptor_part2);
}
#ifdef __cplusplus
}
#endif
#endif
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