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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_HIERARCHY_DESCRIPTOR
#define _UCSI_MPEG_HIERARCHY_DESCRIPTOR 1
#ifdef __cplusplus
extern "C"
{
#endif
#include <libucsi/descriptor.h>
#include <libucsi/endianops.h>
/**
* Hierarchy type values.
*/
enum {
MPEG_HIERARCHY_TYPE_ISO13818_2_SPATIAL_SCALABILITY = 0x01,
MPEG_HIERARCHY_TYPE_ISO13818_2_SNR_SCALABILITY = 0x02,
MPEG_HIERARCHY_TYPE_ISO13818_2_TEMPORAL_SCALABILITY = 0x03,
MPEG_HIERARCHY_TYPE_ISO13818_2_DATA_PARTITIONING = 0x04,
MPEG_HIERARCHY_TYPE_ISO13818_3_EXTENSION_BITSTREAM = 0x05,
MPEG_HIERARCHY_TYPE_ISO13818_1_PRIVATE_BITSTREAM = 0x06,
MPEG_HIERARCHY_TYPE_ISO13818_2_MULTI_VIEW_PROFILE = 0x07,
MPEG_HIERARCHY_TYPE_BASE_LAYER = 0x0f,
};
/**
* mpeg_hierarchy_descriptor structure.
*/
struct mpeg_hierarchy_descriptor {
struct descriptor d;
EBIT2(uint8_t reserved_1 : 4; ,
uint8_t hierarchy_type : 4; );
EBIT2(uint8_t reserved_2 : 2; ,
uint8_t hierarchy_layer_index : 6; );
EBIT2(uint8_t reserved_3 : 2; ,
uint8_t hierarchy_embedded_layer_index : 6; );
EBIT2(uint8_t reserved_4 : 2; ,
uint8_t hierarchy_channel : 6; );
} __ucsi_packed;
/**
* Process an mpeg_hierarchy_descriptor.
*
* @param d Generic descriptor structure.
* @return Pointer to mpeg_hierarchy_descriptor structure, or NULL on error.
*/
static inline struct mpeg_hierarchy_descriptor*
mpeg_hierarchy_descriptor_codec(struct descriptor* d)
{
if (d->len != (sizeof(struct mpeg_hierarchy_descriptor) - 2))
return NULL;
return (struct mpeg_hierarchy_descriptor*) d;
}
#ifdef __cplusplus
}
#endif
#endif
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