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324 lines
12 KiB
324 lines
12 KiB
/*****************************************************************************
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* desc_25.h: ISO/IEC 13818-1 Descriptor 0x25 (Metadata pointer 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_25_H__
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#define __BITSTREAM_MPEG_DESC_25_H__
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#include <bitstream/common.h>
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#include <bitstream/mpeg/psi/descriptors.h>
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#include <bitstream/mpeg/psi/desc_24.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 0x25 (Metadata pointer descriptor)
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*****************************************************************************/
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#define DESC25_HEADER_SIZE (DESC_HEADER_SIZE + 5)
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static inline void desc25_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x25);
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}
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#define desc25_get_metadata_application_format desc24_get_metadata_application_format
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#define desc25_set_metadata_application_format desc24_set_metadata_application_format
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#define desc25_get_metadata_application_format_identifier desc24_get_metadata_application_format_identifier
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#define desc25_set_metadata_application_format_identifier desc24_set_metadata_application_format_identifier
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#define __ofs1 \
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(4 + (desc25_get_metadata_application_format(p_desc) == 0xffff ? 4 : 0))
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static inline uint8_t desc25_get_metadata_format(const uint8_t *p_desc)
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{
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return p_desc[__ofs1];
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}
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static inline void desc25_set_metadata_format(uint8_t *p_desc, uint8_t i_format)
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{
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p_desc[__ofs1] = i_format;
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}
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static inline uint32_t desc25_get_metadata_format_identifier(const uint8_t *p_desc)
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{
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if (desc25_get_metadata_format(p_desc) == 0xff) {
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uint8_t ofs = __ofs1;
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return (p_desc[ofs + 1] << 24) | (p_desc[ofs + 2] << 16) | (p_desc[ofs + 3] << 8) | p_desc[ofs + 4];
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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 desc25_set_metadata_format_identifier(uint8_t *p_desc, uint32_t i_identifier)
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{
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if (desc25_get_metadata_format(p_desc) == 0xff) {
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uint8_t ofs = __ofs1;
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p_desc[ofs + 1] = (i_identifier >> 24) & 0xff;
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p_desc[ofs + 2] = (i_identifier >> 16) & 0xff;
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p_desc[ofs + 3] = (i_identifier >> 8) & 0xff;
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p_desc[ofs + 4] = i_identifier & 0xff;
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}
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}
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#define __ofs2 \
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(__ofs1 + 1 + (desc25_get_metadata_format(p_desc) == 0xff ? 4 : 0))
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static inline uint8_t desc25_get_metadata_service_id(const uint8_t *p_desc)
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{
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return p_desc[__ofs2];
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}
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static inline void desc25_set_metadata_service_id(uint8_t *p_desc, uint8_t i_service_id)
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{
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p_desc[__ofs2] = i_service_id;
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}
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static inline bool desc25_get_metadata_locator_record_flag(const uint8_t *p_desc)
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{
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return (p_desc[__ofs2 + 1] & 0x80) == 0x80;
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}
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static inline void desc25_set_metadata_locator_record_flag(uint8_t *p_desc, bool b_flag)
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{
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uint8_t ofs = __ofs2;
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p_desc[ofs + 1] = (b_flag ? (p_desc[ofs + 1] | 0x80) : (p_desc[ofs + 1] &~ 0x80)) | 0x1f;
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}
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static inline uint8_t desc25_get_mpeg_carriage_flags(const uint8_t *p_desc)
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{
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return (p_desc[__ofs2 + 1] & 0x60) >> 5;
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}
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static inline void desc25_set_mpeg_carriage_flags(uint8_t *p_desc, uint8_t i_flags)
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{
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uint8_t ofs = __ofs2;
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p_desc[ofs + 1] = ((p_desc[ofs + 1] & 0x80) | ((i_flags & 0x03) << 5)) | 0x1f;
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}
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static inline uint8_t desc25_get_metadata_locator_record_length(const uint8_t *p_desc)
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{
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return desc25_get_metadata_locator_record_flag(p_desc) ? p_desc[__ofs2 + 2] : 0;
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}
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static inline const uint8_t *desc25_get_metadata_locator_record_data(const uint8_t *p_desc)
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{
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return desc25_get_metadata_locator_record_flag(p_desc) ? p_desc + __ofs2 + 3 : NULL;
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}
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static inline const uint8_t *desc25_get_metadata_locator_record(const uint8_t *p_desc, uint8_t *i_length)
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{
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*i_length = desc25_get_metadata_locator_record_length(p_desc);
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return desc25_get_metadata_locator_record_data(p_desc);
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}
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static inline void desc25_set_metadata_locator_record(uint8_t *p_desc, uint8_t i_length, uint8_t *p_data)
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{
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if (desc25_get_metadata_locator_record_flag(p_desc)) {
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uint8_t ofs = __ofs2;
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p_desc[ofs + 2] = i_length;
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memcpy(p_desc + ofs + 3, p_data, i_length);
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}
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}
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#define __ofs3 \
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(__ofs2 + 1 + \
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(desc25_get_metadata_locator_record_flag(p_desc) \
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? 1 + desc25_get_metadata_locator_record_length(p_desc) \
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: 0 \
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) + 1 \
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)
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static inline uint16_t desc25_get_program_number(const uint8_t *p_desc)
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{
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uint8_t i_flags = desc25_get_mpeg_carriage_flags(p_desc);
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if (i_flags == 0 || i_flags == 1 || i_flags == 2) {
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uint8_t ofs = __ofs3;
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return (p_desc[ofs + 0] << 8) | p_desc[ofs + 1];
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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 desc25_set_program_number(uint8_t *p_desc, uint16_t i_program)
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{
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uint8_t i_flags = desc25_get_mpeg_carriage_flags(p_desc);
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if (i_flags == 0 || i_flags == 1 || i_flags == 2) {
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uint8_t ofs = __ofs3;
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p_desc[ofs + 0] = (i_program >> 8) & 0xff;
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p_desc[ofs + 1] = i_program & 0xff;
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}
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}
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static inline uint16_t desc25_get_ts_location(const uint8_t *p_desc)
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{
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if (desc25_get_mpeg_carriage_flags(p_desc) == 1) {
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uint8_t ofs = __ofs3;
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return (p_desc[ofs + 2] << 8) | p_desc[ofs + 3];
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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 desc25_set_ts_location(uint8_t *p_desc, uint16_t i_ts_location)
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{
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if (desc25_get_mpeg_carriage_flags(p_desc) == 1) {
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uint8_t ofs = __ofs3;
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p_desc[ofs + 2] = (i_ts_location >> 8) & 0xff;
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p_desc[ofs + 3] = i_ts_location & 0xff;
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}
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}
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static inline uint16_t desc25_get_ts_id(const uint8_t *p_desc)
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{
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if (desc25_get_mpeg_carriage_flags(p_desc) == 1) {
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uint8_t ofs = __ofs3;
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return (p_desc[ofs + 4] << 8) | p_desc[ofs + 5];
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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 desc25_set_ts_id(uint8_t *p_desc, uint16_t i_ts_id)
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{
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if (desc25_get_mpeg_carriage_flags(p_desc) == 1) {
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uint8_t ofs = __ofs3;
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p_desc[ofs + 4] = (i_ts_id >> 8) & 0xff;
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p_desc[ofs + 5] = i_ts_id & 0xff;
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}
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}
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#undef __ofs1
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#undef __ofs2
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#undef __ofs3
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static inline int desc25_calc_length(const uint8_t *p_desc)
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{
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int i_length = DESC25_HEADER_SIZE - DESC_HEADER_SIZE;
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uint8_t i_flags = desc25_get_mpeg_carriage_flags(p_desc);
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if (desc25_get_metadata_application_format(p_desc) == 0xffff)
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i_length += 4;
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if (desc25_get_metadata_format(p_desc) == 0xff)
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i_length += 4;
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if (desc25_get_metadata_locator_record_flag(p_desc))
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i_length += 1 + desc25_get_metadata_locator_record_length(p_desc);
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if (i_flags == 0 || i_flags == 1 || i_flags == 2)
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i_length += 2;
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if (i_flags == 1)
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i_length += 4;
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return i_length;
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}
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static inline bool desc25_validate(const uint8_t *p_desc)
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{
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return desc25_calc_length(p_desc) <= desc_get_length(p_desc);
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}
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static inline void desc25_set_length(uint8_t *p_desc)
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{
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desc_set_length(p_desc, desc25_calc_length(p_desc));
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}
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static inline void desc25_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, i_metadata_locator_record_length;
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const uint8_t *p_metadata_locator_record = desc25_get_metadata_locator_record(p_desc, &i_metadata_locator_record_length);
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char psz_metadata_locator_record[2 * 255 + 1];
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for (i = 0; i < i_metadata_locator_record_length; i++)
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sprintf(psz_metadata_locator_record + 2 * i, "%02x", p_metadata_locator_record[i]);
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psz_metadata_locator_record[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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"<METADATA_POINTER_DESC metadata_application_format=\"0x%04x\""
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" metadata_application_format_identifier=\"0x%08x\""
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" metadata_format=\"0x%02x\""
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" metadata_format_identifier=\"0x%08x\""
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" metadata_service_id=\"0x%02x\""
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" metadata_locator_record_flag=\"%u\""
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" metadata_locator_record_length=\"%u\""
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" metadata_locator_record=\"%s\""
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" mpeg_carriage_flags=\"%u\""
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" program_number=\"%u\" ts_location=\"%u\" ts_id=\"%u\"/>",
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desc25_get_metadata_application_format(p_desc),
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desc25_get_metadata_application_format_identifier(p_desc),
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desc25_get_metadata_format(p_desc),
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desc25_get_metadata_format_identifier(p_desc),
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desc25_get_metadata_service_id(p_desc),
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desc25_get_metadata_locator_record_flag(p_desc),
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desc25_get_metadata_locator_record_length(p_desc),
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psz_metadata_locator_record, // desc25_get_metadata_locator_record_data(p_desc)
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desc25_get_mpeg_carriage_flags(p_desc),
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desc25_get_program_number(p_desc),
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desc25_get_ts_location(p_desc),
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desc25_get_ts_id(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 25 metadata_pointer_desc metadata_application_format=0x%04x"
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" metadata_application_format_identifier=0x%08x"
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" metadata_format=0x%02x"
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" metadata_format_identifier=0x%08x"
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" metadata_service_id=0x%02x"
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" metadata_locator_record_flag=%u"
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" metadata_locator_record_length=%u"
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" metadata_locator_record=\"%s\""
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" mpeg_carriage_flags=%u"
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" program_number=%u ts_location=%u ts_id=%u",
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desc25_get_metadata_application_format(p_desc),
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desc25_get_metadata_application_format_identifier(p_desc),
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desc25_get_metadata_format(p_desc),
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desc25_get_metadata_format_identifier(p_desc),
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desc25_get_metadata_service_id(p_desc),
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desc25_get_metadata_locator_record_flag(p_desc),
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desc25_get_metadata_locator_record_length(p_desc),
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psz_metadata_locator_record, // desc25_get_metadata_locator_record_data(p_desc)
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desc25_get_mpeg_carriage_flags(p_desc),
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desc25_get_program_number(p_desc),
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desc25_get_ts_location(p_desc),
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desc25_get_ts_id(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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