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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_MPEG_IOD_DESCRIPTOR
#define _UCSI_MPEG_IOD_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* mpeg_iod_descriptor structure.
*/
struct mpeg_iod_descriptor {
struct descriptor d;
uint8_t scope_of_iod_label;
uint8_t iod_label;
/* uint8_t iod[] */
} __ucsi_packed;
/**
* Process an mpeg_iod_descriptor.
*
* @param d Generic descriptor structure.
* @return Pointer to an mpeg_iod_descriptor structure, or NULL on error.
*/
static inline struct mpeg_iod_descriptor*
mpeg_iod_descriptor_codec(struct descriptor* d)
{
if (d->len < (sizeof(struct mpeg_iod_descriptor) - 2))
return NULL;
return (struct mpeg_iod_descriptor*) d;
}
/**
* Retrieve pointer to iod field of an mpeg_iod_descriptor structure.
*
* @param d Pointer to mpeg_iod_descriptor structure.
* @return Pointer to the iod field.
*/
static inline uint8_t *
mpeg_iod_descriptor_iod(struct mpeg_iod_descriptor *d)
{
return (uint8_t *) d + sizeof(struct mpeg_iod_descriptor);
}
/**
* Calculate the length of the iod field of an mpeg_iod_descriptor structure.
*
* @param d Pointer to mpeg_iod_descriptor structure.
* @return The number of bytes.
*/
static inline int
mpeg_iod_descriptor_iod_length(struct mpeg_iod_descriptor *d)
{
return d->d.len - 2;
}
#ifdef __cplusplus
}
#endif
#endif
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