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