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142 lines
4.7 KiB
142 lines
4.7 KiB
/*****************************************************************************
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* desc_04.h: ISO/IEC 13818-1 Descriptor 0x04 (Hierarchy 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_04_H__
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#define __BITSTREAM_MPEG_DESC_04_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 0x04: Hierarchy descriptor
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*****************************************************************************/
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#define DESC04_HEADER_SIZE (DESC_HEADER_SIZE + 4)
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static inline void desc04_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x04);
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desc_set_length(p_desc, DESC04_HEADER_SIZE - DESC_HEADER_SIZE);
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}
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static inline uint8_t desc04_get_type(const uint8_t *p_desc)
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{
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return p_desc[2] & 0x0f;
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}
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static inline void desc04_set_type(uint8_t *p_desc, uint8_t i_type)
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{
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p_desc[2] = (i_type & 0x0f) | 0xf0;
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}
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static inline uint8_t desc04_get_layer_index(const uint8_t *p_desc)
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{
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return p_desc[3] & 0x3f;
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}
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static inline void desc04_set_layer_index(uint8_t *p_desc, uint8_t i_layer_index)
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{
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p_desc[3] = i_layer_index | 0xc0;
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}
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static inline uint8_t desc04_get_embedded_layer_index(const uint8_t *p_desc)
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{
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return p_desc[4] & 0x3f;
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}
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static inline void desc04_set_embedded_layer_index(uint8_t *p_desc, uint8_t i_embedded_layer_index)
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{
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p_desc[4] = i_embedded_layer_index | 0xc0;
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}
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static inline uint8_t desc04_get_channel(const uint8_t *p_desc)
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{
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return p_desc[5] & 0x3f;
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}
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static inline void desc04_set_channel(uint8_t *p_desc, uint8_t i_channel)
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{
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p_desc[5] = i_channel | 0xc0;
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}
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static inline char *desc04_get_type_txt(uint8_t i_type)
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{
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return i_type == 0 ? "reserved" :
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i_type == 1 ? "Spatial Scalability" :
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i_type == 2 ? "SNR Scalability" :
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i_type == 3 ? "Temporal Scalability" :
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i_type == 4 ? "Data paritioning" :
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i_type == 5 ? "Extension bitstream" :
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i_type == 6 ? "Private Stream" :
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i_type == 7 ? "Multi-view Profile" :
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i_type >= 8 && i_type <= 14 ? "reserved" :
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i_type == 15 ? "base layer" : "unknown";
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}
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static inline bool desc04_validate(const uint8_t *p_desc)
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{
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return desc_get_length(p_desc) >= DESC04_HEADER_SIZE - DESC_HEADER_SIZE;
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}
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static inline void desc04_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, "<HIERARCHY_DESC type=\"%u\" type_txt=\"%s\" layer_index=\"%u\" embedded_layer_index=\"%u\" channel=\"%u\"/>",
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desc04_get_type(p_desc),
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desc04_get_type_txt(desc04_get_type(p_desc)),
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desc04_get_layer_index(p_desc),
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desc04_get_embedded_layer_index(p_desc),
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desc04_get_channel(p_desc)
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);
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break;
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default:
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pf_print(opaque, " - desc 04 hierarchy type=%u type_txt=\"%s\" layer_index=%u embedded_layer_index=%u channel=%u",
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desc04_get_type(p_desc),
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desc04_get_type_txt(desc04_get_type(p_desc)),
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desc04_get_layer_index(p_desc),
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desc04_get_embedded_layer_index(p_desc),
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desc04_get_channel(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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