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/*****************************************************************************
* desc_0b.h: ISO/IEC 13818-1 Descriptor 0x0b (System clock descriptor)
*****************************************************************************
* 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_0B_H__
#define __BITSTREAM_MPEG_DESC_0B_H__
#include <bitstream/common.h>
#include <bitstream/mpeg/psi/descriptors.h>
#ifdef __cplusplus
extern "C"
{
#endif
/*****************************************************************************
* Descriptor 0x0b: System clock descriptor
*****************************************************************************/
#define DESC0B_HEADER_SIZE (DESC_HEADER_SIZE + 2)
static inline void desc0b_init(uint8_t *p_desc)
{
desc_set_tag(p_desc, 0x0b);
desc_set_length(p_desc, DESC0B_HEADER_SIZE - DESC_HEADER_SIZE);
}
static inline bool desc0b_get_external_clock_reference_indicator(const uint8_t *p_desc)
{
return (p_desc[2] & 0x80) == 0x80;
}
static inline void desc0b_set_external_clock_reference_indicator(uint8_t *p_desc, bool b_external_clock_reference_indicator)
{
p_desc[2] = (b_external_clock_reference_indicator ? (p_desc[2] | 0x80) : (p_desc[2] &~ 0x80)) | 0x40;
}
static inline uint8_t desc0b_get_clock_accuracy_integer(const uint8_t *p_desc)
{
return p_desc[2] & 0x3f;
}
static inline void desc0b_set_clock_accuracy_integer(uint8_t *p_desc, uint8_t i_clock_accuracy_integer) {
p_desc[2] = (p_desc[2] & 0x80) | 0x40 | (i_clock_accuracy_integer & 0x3f);
}
static inline uint8_t desc0b_get_clock_accuracy_exponent(const uint8_t *p_desc)
{
return p_desc[3] >> 5;
}
static inline void desc0b_set_clock_accuracy_exponent(uint8_t *p_desc, uint8_t i_clock_accuracy_exponent)
{
p_desc[3] = (i_clock_accuracy_exponent << 5) | 0x1F;
}
static inline bool desc0b_validate(const uint8_t *p_desc)
{
return desc_get_length(p_desc) >= DESC0B_HEADER_SIZE - DESC_HEADER_SIZE;
}
static inline void desc0b_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, "<SYSTEM_CLOCK_DESC external_clock_reference_indicator=\"%u\" clock_accuracy_integer=\"%u\" clock_accuracy_exponent=\"%u\"/>",
desc0b_get_external_clock_reference_indicator(p_desc),
desc0b_get_clock_accuracy_integer(p_desc),
desc0b_get_clock_accuracy_exponent(p_desc));
break;
default:
pf_print(opaque, " - desc 0b system_clock external_clock_reference_indicator=%u clock_accuracy_integer=%u clock_accuracy_exponent=%u",
desc0b_get_external_clock_reference_indicator(p_desc),
desc0b_get_clock_accuracy_integer(p_desc),
desc0b_get_clock_accuracy_exponent(p_desc));
}
}
#ifdef __cplusplus
}
#endif
#endif
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