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/*****************************************************************************
* desc_06.h: ISO/IEC 13818-1 Descriptor 0x06 (Data stream alignment)
*****************************************************************************
* Copyright (C) 2011 Unix Solutions Ltd.
*
* Authors: Georgi Chorbadzhiyski <georgi@unixsol.org>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject
* to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*****************************************************************************/
/*
* Normative references:
* - ISO/IEC 13818-1:2007(E) (MPEG-2 Systems)
*/
#ifndef __BITSTREAM_MPEG_DESC_06_H__
#define __BITSTREAM_MPEG_DESC_06_H__
#include <bitstream/common.h>
#include <bitstream/mpeg/psi/descriptors.h>
#ifdef __cplusplus
extern "C"
{
#endif
/*****************************************************************************
* Descriptor 0x06: Data stream alignment descriptor
*****************************************************************************/
#define DESC06_HEADER_SIZE (DESC_HEADER_SIZE + 1)
static inline void desc06_init(uint8_t *p_desc)
{
desc_set_tag(p_desc, 0x06);
desc_set_length(p_desc, DESC06_HEADER_SIZE - DESC_HEADER_SIZE);
}
static inline void desc06_set_alignment(uint8_t *p_desc, uint8_t alignment)
{
p_desc[2] = alignment;
}
static inline uint8_t desc06_get_alignment(const uint8_t *p_desc)
{
return p_desc[2];
}
static inline const char *desc06_get_alignment_txt(uint8_t alignment)
{
return alignment == 0x00 ? "Reserved" :
alignment == 0x01 ? "Slice, or video access unit or syncword" :
alignment == 0x02 ? "Video access unit" :
alignment == 0x03 ? "GOP, or SEQ" :
alignment == 0x04 ? "SEQ" : "Reserved";
}
static inline bool desc06_validate(const uint8_t *p_desc)
{
return desc_get_length(p_desc) >= DESC06_HEADER_SIZE - DESC_HEADER_SIZE;
}
static inline void desc06_print(const uint8_t *p_desc, f_print pf_print,
void *opaque, print_type_t i_print_type)
{
switch (i_print_type) {
case PRINT_XML:
pf_print(opaque, "<DATA_STREAM_ALIGNMENT_DESC alignment=\"%u\" alignment_txt=\"%s\"/>",
desc06_get_alignment(p_desc),
desc06_get_alignment_txt(desc06_get_alignment(p_desc)));
break;
default:
pf_print(opaque, " - desc 06 data_stream_alignment alignment=%u alignment_txt=\"%s\"",
desc06_get_alignment(p_desc),
desc06_get_alignment_txt(desc06_get_alignment(p_desc)));
}
}
#ifdef __cplusplus
}
#endif
#endif
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