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363 lines
13 KiB
363 lines
13 KiB
/*****************************************************************************
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* desc_24.h: ISO/IEC 13818-1 Descriptor 0x24 (Content labeling 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_24_H__
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#define __BITSTREAM_MPEG_DESC_24_H__
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#include <inttypes.h> /* PRIu64 */
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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 0x24 (Content labeling descriptor)
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*****************************************************************************/
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#define DESC24_HEADER_SIZE (DESC_HEADER_SIZE + 3)
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static inline void desc24_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x24);
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}
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static inline uint16_t desc24_get_metadata_application_format(const uint8_t *p_desc)
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{
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return (p_desc[2] << 8) | p_desc[3];
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}
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static inline void desc24_set_metadata_application_format(uint8_t *p_desc, uint16_t i_format)
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{
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p_desc[2] = (i_format >> 8) & 0xff;
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p_desc[3] = i_format & 0xff;
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}
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static inline uint32_t desc24_get_metadata_application_format_identifier(const uint8_t *p_desc)
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{
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if (desc24_get_metadata_application_format(p_desc) == 0xffff)
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return (p_desc[4] << 24) | (p_desc[5] << 16) | (p_desc[6] << 8) | p_desc[7];
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else
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return 0;
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}
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static inline void desc24_set_metadata_application_format_identifier(uint8_t *p_desc, uint32_t i_identifier)
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{
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if (desc24_get_metadata_application_format(p_desc) != 0xffff)
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return;
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p_desc[4] = (i_identifier >> 24) & 0xff;
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p_desc[5] = (i_identifier >> 16) & 0xff;
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p_desc[6] = (i_identifier >> 8) & 0xff;
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p_desc[7] = i_identifier & 0xff;
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}
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#define __ofs1 \
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(4 + (desc24_get_metadata_application_format(p_desc) == 0xffff ? 4 : 0))
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static inline bool desc24_get_content_reference_id_record_flag(const uint8_t *p_desc)
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{
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return (p_desc[__ofs1] & 0x80) == 0x80;
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}
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static inline void desc24_set_content_reference_id_record_flag(uint8_t *p_desc, bool b_flag)
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{
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uint8_t ofs = __ofs1;
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p_desc[ofs] = (b_flag ? (p_desc[ofs] | 0x80) : (p_desc[ofs] &~ 0x80)) | 0x07;
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}
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static inline uint8_t desc24_get_content_time_base_indicator(const uint8_t *p_desc)
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{
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return (p_desc[__ofs1] >> 3) & 0x0f;
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}
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static inline void desc24_set_content_time_base_indicator(uint8_t *p_desc, uint8_t i_indicator)
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{
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uint8_t ofs = __ofs1;
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p_desc[ofs] = (p_desc[ofs] & 0x80) | ((i_indicator & 0x0f) << 3) | 0x07;
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}
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static inline uint8_t desc24_get_content_reference_id_length(const uint8_t *p_desc)
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{
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return desc24_get_content_reference_id_record_flag(p_desc) ? p_desc[__ofs1 + 1] : 0;
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}
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static inline const uint8_t *desc24_get_content_reference_id_data(const uint8_t *p_desc)
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{
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return desc24_get_content_reference_id_record_flag(p_desc) ? p_desc + __ofs1 + 2 : NULL;
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}
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static inline const uint8_t *desc24_get_content_reference_id(const uint8_t *p_desc, uint8_t *i_length)
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{
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*i_length = desc24_get_content_reference_id_length(p_desc);
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return desc24_get_content_reference_id_data(p_desc);
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}
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static inline void desc24_set_content_reference_id_record(uint8_t *p_desc, uint8_t i_length, uint8_t *p_data)
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{
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if (desc24_get_content_reference_id_record_flag(p_desc)) {
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uint8_t ofs = __ofs1;
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p_desc[ofs + 1] = i_length;
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memcpy(p_desc + ofs + 2, p_data, i_length);
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}
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}
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#define __ofs2 \
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(__ofs1 + 1 + \
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(desc24_get_content_reference_id_record_flag(p_desc) \
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? 1 + desc24_get_content_reference_id_length(p_desc) \
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: 0 \
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) \
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)
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static inline uint64_t desc24_get_content_time_base_value(const uint8_t *p_desc)
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{
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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if (i_indicator == 1 || i_indicator == 2) {
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uint8_t ofs = __ofs2;
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return (uint64_t)(
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(((uint64_t)p_desc[ofs] & 0x01ull) << 32) |
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((uint64_t)p_desc[ofs + 1] << 24) |
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((uint64_t)p_desc[ofs + 2] << 16) |
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((uint64_t)p_desc[ofs + 3] << 8) |
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(uint64_t)p_desc[ofs + 4]
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);
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} else {
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return 0;
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}
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}
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static inline void desc24_set_content_time_base_value(uint8_t *p_desc, uint64_t i_value)
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{
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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if (i_indicator == 1 || i_indicator == 2) {
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uint8_t ofs = __ofs2;
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p_desc[ofs + 0] = 0xfe | ((i_value >> 32) & 0x01);
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p_desc[ofs + 1] = (i_value >> 24) & 0xff;
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p_desc[ofs + 2] = (i_value >> 16) & 0xff;
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p_desc[ofs + 3] = (i_value >> 8) & 0xff;
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p_desc[ofs + 4] = i_value & 0xff;
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}
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}
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static inline uint64_t desc24_get_metadata_time_base_value(const uint8_t *p_desc)
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{
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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if (i_indicator == 1 || i_indicator == 2) {
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uint8_t ofs = __ofs2 + 5;
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return (uint64_t)(
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(((uint64_t)p_desc[ofs] & 0x01ull) << 32) |
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((uint64_t)p_desc[ofs + 1] << 24) |
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((uint64_t)p_desc[ofs + 2] << 16) |
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((uint64_t)p_desc[ofs + 3] << 8) |
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(uint64_t)p_desc[ofs + 4]
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);
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} else {
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return 0;
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}
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}
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static inline void desc24_set_metadata_time_base_value(uint8_t *p_desc, uint64_t i_value)
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{
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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if (i_indicator == 1 || i_indicator == 2) {
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uint8_t ofs = __ofs2 + 5;
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p_desc[ofs + 0] = 0xfe | ((i_value >> 32) & 0x01);
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p_desc[ofs + 1] = (i_value >> 24) & 0xff;
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p_desc[ofs + 2] = (i_value >> 16) & 0xff;
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p_desc[ofs + 3] = (i_value >> 8) & 0xff;
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p_desc[ofs + 4] = i_value & 0xff;
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}
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}
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static inline uint8_t desc24_get_content_id(const uint8_t *p_desc)
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{
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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if (i_indicator == 2) {
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uint8_t ofs = __ofs2 + 10;
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return p_desc[ofs] & 0x7f;
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} else {
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return 0;
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}
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}
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static inline void desc24_set_content_id(uint8_t *p_desc, uint8_t i_content_id)
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{
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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if (i_indicator == 2) {
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uint8_t ofs = __ofs2 + 10;
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p_desc[ofs + 0] = 0x80 | i_content_id;
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}
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}
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static inline uint8_t desc24_get_time_base_association_data_length(const uint8_t *p_desc)
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{
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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return (i_indicator >= 3 && i_indicator <= 7) ? p_desc[__ofs2] : 0;
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}
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static inline const uint8_t *desc24_get_time_base_association_data(const uint8_t *p_desc)
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{
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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return (i_indicator >= 3 && i_indicator <= 7) ? p_desc + 1 + __ofs2 : NULL;
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}
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static inline const uint8_t *desc24_get_time_base_association(const uint8_t *p_desc, uint8_t *i_length)
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{
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*i_length = desc24_get_time_base_association_data_length(p_desc);
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return desc24_get_time_base_association_data(p_desc);
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}
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static inline void desc24_set_time_base_association(uint8_t *p_desc, uint8_t i_length, uint8_t *p_data)
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{
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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if (i_indicator >= 3 && i_indicator <= 7) {
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uint8_t ofs = __ofs2;
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p_desc[ofs] = i_length;
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memcpy(p_desc + ofs + 1, p_data, i_length);
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}
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}
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#undef __ofs1
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#undef __ofs2
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static inline int desc24_calc_length(const uint8_t *p_desc)
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{
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int i_length = DESC24_HEADER_SIZE - DESC_HEADER_SIZE;
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uint8_t i_indicator = desc24_get_content_time_base_indicator(p_desc);
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if (desc24_get_metadata_application_format(p_desc) == 0xffff)
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i_length += 4;
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if (desc24_get_content_reference_id_record_flag(p_desc))
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i_length += 1 + desc24_get_content_reference_id_length(p_desc);
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if (i_indicator == 1 || i_indicator == 2)
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i_length += 10;
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if (i_indicator == 2)
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i_length += 1;
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if (i_indicator >= 3 && i_indicator <= 7)
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i_length += 1 + desc24_get_time_base_association_data_length(p_desc);
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return i_length;
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}
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static inline bool desc24_validate(const uint8_t *p_desc)
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{
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return desc24_calc_length(p_desc) <= desc_get_length(p_desc);
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}
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static inline void desc24_set_length(uint8_t *p_desc)
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{
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desc_set_length(p_desc, desc24_calc_length(p_desc));
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}
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static inline void desc24_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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uint8_t i;
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uint8_t i_content_reference_id_length;
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uint8_t i_time_base_association_data_length;
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const uint8_t *p_content_reference_id = desc24_get_content_reference_id(p_desc, &i_content_reference_id_length);
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const uint8_t *p_time_base_association_data = desc24_get_time_base_association(p_desc, &i_time_base_association_data_length);
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char psz_content[2 * 255 + 1];
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char psz_time_base[2 * 255 + 1];
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for (i = 0; i < i_content_reference_id_length; i++)
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sprintf(psz_content + 2 * i, "%02x", p_content_reference_id[i]);
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psz_content[2 * i] = '\0';
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for (i = 0; i < i_time_base_association_data_length; i++)
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sprintf(psz_time_base + 2 * i, "%02x", p_time_base_association_data[i]);
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psz_time_base[2 * i] = '\0';
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switch (i_print_type) {
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case PRINT_XML:
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pf_print(opaque,
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"<CONTENT_LABELING_DESC metadata_application_format=\"0x%04x\""
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" metadata_application_format_identifier=\"0x%08x\""
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" content_reference_id_record_flag=\"%u\""
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" content_reference_id_record_length=\"%u\""
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" content_reference_id_record=\"%s\""
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" content_time_base_indicator=\"%u\""
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" content_time_base_value=\"%" PRIu64 "\""
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" metadata_time_base_value=\"%" PRIu64 "\""
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" content_id=\"%u\""
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" time_base_association_data_length=\"%u\""
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" time_base_association_data=\"%s\"/>",
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desc24_get_metadata_application_format(p_desc),
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desc24_get_metadata_application_format_identifier(p_desc),
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desc24_get_content_reference_id_record_flag(p_desc),
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desc24_get_content_reference_id_length(p_desc),
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psz_content, // desc24_get_content_reference_id_data(p_desc)
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desc24_get_content_time_base_indicator(p_desc),
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desc24_get_content_time_base_value(p_desc),
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desc24_get_metadata_time_base_value(p_desc),
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desc24_get_content_id(p_desc),
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desc24_get_time_base_association_data_length(p_desc),
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psz_time_base // desc24_get_time_base_association_data(p_desc)
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);
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break;
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default:
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pf_print(opaque,
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" - desc 24 content_labeling metadata_application_format=0x%04x"
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" metadata_application_format_identifier=0x%08x"
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" content_reference_id_record_flag=%u"
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" content_reference_id_record_length=%u"
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" content_reference_id_record=\"%s\""
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" content_time_base_indicator=%u"
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" content_time_base_value=\"%" PRIu64 "\""
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" metadata_time_base_value=\"%" PRIu64 "\""
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" content_id=%u"
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" time_base_association_data_length=%u"
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" time_base_association_data=\"%s\"",
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desc24_get_metadata_application_format(p_desc),
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desc24_get_metadata_application_format_identifier(p_desc),
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desc24_get_content_reference_id_record_flag(p_desc),
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desc24_get_content_reference_id_length(p_desc),
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psz_content, // desc24_get_content_reference_id_data(p_desc)
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desc24_get_content_time_base_indicator(p_desc),
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desc24_get_content_time_base_value(p_desc),
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desc24_get_metadata_time_base_value(p_desc),
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desc24_get_content_id(p_desc),
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desc24_get_time_base_association_data_length(p_desc),
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psz_time_base // desc24_get_time_base_association_data(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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