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119 lines
4.2 KiB
119 lines
4.2 KiB
/*****************************************************************************
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* desc_07.h: ISO/IEC 13818-1 Descriptor 0x07 (Target Background Grid)
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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_07_H__
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#define __BITSTREAM_MPEG_DESC_07_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 0x07: Target Background Grid descriptor
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*****************************************************************************/
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#define DESC07_HEADER_SIZE (DESC_HEADER_SIZE + 4)
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static inline void desc07_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x07);
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desc_set_length(p_desc, DESC07_HEADER_SIZE - DESC_HEADER_SIZE);
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}
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static inline uint16_t desc07_get_horizontal_size(const uint8_t *p_desc)
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{
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return ((uint16_t)p_desc[2] << 6) | (p_desc[3] >> 2);
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}
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static inline void desc07_set_horizontal_size(uint8_t *p_desc, uint16_t i_horizontal_size)
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{
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p_desc[2] = (i_horizontal_size >> 6) & 0xff;
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p_desc[3] = ((i_horizontal_size & 0xff) << 2) | (p_desc[3] & 0x03);
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}
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static inline uint16_t desc07_get_vertical_size(const uint8_t *p_desc)
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{
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return ((uint16_t)(p_desc[3] & 0x03) << 12) |
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(uint16_t)(p_desc[4] << 4) |
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((p_desc[5] & 0xf0) >> 4);
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}
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static inline void desc07_set_vertical_size(uint8_t *p_desc, uint16_t i_vertical_size)
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{
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p_desc[3] = (p_desc[3] & 0xfc) | ((i_vertical_size >> 12) & 0x03);
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p_desc[4] = (i_vertical_size >> 4) & 0xff;
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p_desc[5] = ((i_vertical_size & 0x0f) << 4) | (p_desc[5] & 0x0f);
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}
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static inline uint8_t desc07_get_aspect_ratio_info(const uint8_t *p_desc)
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{
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return p_desc[5] & 0x0f;
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}
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static inline void desc07_set_aspect_ratio_info(uint8_t *p_desc, uint8_t i_aspect_ratio_info)
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{
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p_desc[5] = (p_desc[5] & 0xf0) | (i_aspect_ratio_info & 0x0f);
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}
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static inline bool desc07_validate(const uint8_t *p_desc)
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{
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return desc_get_length(p_desc) >= DESC07_HEADER_SIZE - DESC_HEADER_SIZE;
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}
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static inline void desc07_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, "<TARGET_BACKGROUND_GRID_DESC horizontal_size=\"%u\" vertical_size=\"%u\" aspect_ratio_info=\"%u\"/>",
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desc07_get_horizontal_size(p_desc),
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desc07_get_vertical_size(p_desc),
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desc07_get_aspect_ratio_info(p_desc)
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);
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break;
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default:
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pf_print(opaque, " - desc 07 target_background_grid horizontal_size=%u vertical_size=%u aspect_ratio_info=%u",
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desc07_get_horizontal_size(p_desc),
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desc07_get_vertical_size(p_desc),
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desc07_get_aspect_ratio_info(p_desc)
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);
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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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