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111 lines
3.9 KiB
111 lines
3.9 KiB
/*****************************************************************************
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* desc_12.h: ISO/IEC 13818-1 Descriptor 0x12 (IBP descriptor)
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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_12_H__
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#define __BITSTREAM_MPEG_DESC_12_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 0x12: IBP descriptor
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*****************************************************************************/
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#define DESC12_HEADER_SIZE (DESC_HEADER_SIZE + 2)
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static inline void desc12_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x12);
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desc_set_length(p_desc, DESC12_HEADER_SIZE - DESC_HEADER_SIZE);
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}
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static inline bool desc12_validate(const uint8_t *p_desc)
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{
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return desc_get_length(p_desc) >= DESC12_HEADER_SIZE - DESC_HEADER_SIZE;
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}
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static inline bool desc12_get_closed_gop_flag(const uint8_t *p_desc) {
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return (p_desc[2] & 0x80) == 0x80;
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}
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static inline void desc12_set_closed_gop_flag(uint8_t *p_desc, bool b_closed_gop)
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{
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p_desc[2] = b_closed_gop ? (p_desc[2] | 0x80) : (p_desc[2] &~ 0x80);
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}
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static inline bool desc12_get_identical_gop_flag(const uint8_t *p_desc)
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{
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return (p_desc[2] & 0x40) == 0x40;
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}
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static inline void desc12_set_identical_gop_flag(uint8_t *p_desc, bool b_identical_gop_flag)
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{
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p_desc[2] = b_identical_gop_flag ? (p_desc[2] | 0x40) : (p_desc[2] &~ 0x40);
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}
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static inline uint16_t desc12_get_max_gop_length(const uint8_t *p_desc)
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{
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return ((uint16_t)(p_desc[2] & 0x3f) << 8) | p_desc[3];
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}
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static inline void desc12_set_max_gop_length(uint8_t *p_desc, uint16_t i_max_gop_length) {
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p_desc[2] = (p_desc[2] & 0xC0) | ((i_max_gop_length & 0x3fff) >> 8);
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p_desc[3] = i_max_gop_length & 0xff;
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}
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static inline void desc12_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, "<IBP_DESC closed_gop_flag=\"%u\" identical_gop_flag=\"%u\" max_gop_len=\"%u\"/>",
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desc12_get_closed_gop_flag(p_desc),
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desc12_get_identical_gop_flag(p_desc),
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desc12_get_max_gop_length(p_desc));
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break;
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default:
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pf_print(opaque," - desc 12 ibp closed_gop_flag=%u identical_gop_flag=%u max_gop_len=%u",
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desc12_get_closed_gop_flag(p_desc),
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desc12_get_identical_gop_flag(p_desc),
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desc12_get_max_gop_length(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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