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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_S2_SATELLITE_DELIVERY_DESCRIPTOR
#define _UCSI_DVB_S2_SATELLITE_DELIVERY_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* dvb_s2_satellite_delivery_descriptor structure.
*/
struct dvb_s2_satellite_delivery_descriptor {
struct descriptor d;
EBIT4(uint8_t scrambling_sequence_selector : 1; ,
uint8_t multiple_input_stream : 1; ,
uint8_t backwards_compatability : 1; ,
uint8_t reserved : 5; );
/* uint32_t scrambling_sequence_index if scrambling_sequence_selector = 1 */
/* uint8_t input_stream_id if multiple_input_stream = 1 */
} __ucsi_packed;
/**
* Process a dvb_s2_satellite_delivery_descriptor.
*
* @param d Pointer to a generic descriptor structure.
* @return dvb_s2_satellite_delivery_descriptor pointer, or NULL on error.
*/
static inline struct dvb_s2_satellite_delivery_descriptor*
dvb_s2_satellite_delivery_descriptor_codec(struct descriptor* d)
{
struct dvb_s2_satellite_delivery_descriptor *s2 =
(struct dvb_s2_satellite_delivery_descriptor*) d;
if (d->len < (sizeof(struct dvb_s2_satellite_delivery_descriptor) - 2))
return NULL;
int len = sizeof(struct dvb_s2_satellite_delivery_descriptor);
if (s2->scrambling_sequence_selector) {
len += 3;
}
if (s2->multiple_input_stream) {
len += 1;
}
if (d->len < len)
return NULL;
return s2;
}
/**
* Accessor for the scrambling_sequence_index field of a dvb_s2_satellite_delivery_descriptor.
*
* @param s2 dvb_s2_satellite_delivery_descriptor pointer.
* @return The scrambling_sequence_index.
*/
static inline uint32_t dvb_s2_satellite_delivery_descriptor_scrambling_sequence_index(struct dvb_s2_satellite_delivery_descriptor *s2)
{
uint8_t *tmp = (uint8_t*) s2;
if (s2->scrambling_sequence_selector) {
return ((tmp[4] & 0x03) << 16) | (tmp[5] << 8) | tmp[6];
}
return 0;
}
/**
* Accessor for the input_stream_id field of a dvb_s2_satellite_delivery_descriptor.
*
* @param s2 dvb_s2_satellite_delivery_descriptor pointer.
* @return The input_stream_id.
*/
static inline uint8_t dvb_s2_satellite_delivery_descriptor_input_stream_id(struct dvb_s2_satellite_delivery_descriptor *s2)
{
uint8_t *tmp = (uint8_t*) s2;
if (!s2->multiple_input_stream)
return 0;
int off = 3;
if (s2->scrambling_sequence_selector) {
off += 3;
}
return tmp[off];
}
#ifdef __cplusplus
}
#endif
#endif
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