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120 lines
4.4 KiB
120 lines
4.4 KiB
/*****************************************************************************
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* desc_0d.h: ISO/IEC 13818-1 Descriptor 0x0d (Copyright 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_0D_H__
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#define __BITSTREAM_MPEG_DESC_0D_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 0x0d: Copyright descriptor
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*****************************************************************************/
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#define DESC0D_HEADER_SIZE (DESC_HEADER_SIZE + 4)
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static inline void desc0d_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x0d);
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desc_set_length(p_desc, DESC0D_HEADER_SIZE - DESC_HEADER_SIZE);
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}
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static inline uint32_t desc0d_get_copyright_identifier(const uint8_t *p_desc)
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{
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return (p_desc[2] << 24) | (p_desc[3] << 16) | (p_desc[4] << 8) | p_desc[5];
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}
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static inline void desc0d_set_copyright_identifier(uint8_t *p_desc, uint32_t i_copyright_identifier)
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{
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p_desc[2] = (i_copyright_identifier >> 24) & 0xff;
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p_desc[3] = (i_copyright_identifier >> 16) & 0xff;
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p_desc[4] = (i_copyright_identifier >> 8) & 0xff;
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p_desc[5] = i_copyright_identifier & 0xff;
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}
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static inline const uint8_t *desc0d_get_additional_copyright_info(const uint8_t *p_desc, uint8_t *i_length)
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{
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*i_length = desc_get_length(p_desc) - (DESC0D_HEADER_SIZE - DESC_HEADER_SIZE);
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if (*i_length)
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return &p_desc[DESC0D_HEADER_SIZE];
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return NULL;
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}
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static inline void desc0d_set_additional_copyright_info(uint8_t *p_desc, uint8_t *p_additional_copyright_info, uint8_t i_length)
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{
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if (i_length == 0 || !p_additional_copyright_info)
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desc_set_length(p_desc, DESC0D_HEADER_SIZE - DESC_HEADER_SIZE);
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else if (i_length < 252)
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{
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desc_set_length(p_desc, (DESC0D_HEADER_SIZE - DESC_HEADER_SIZE) + i_length);
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memcpy(p_desc + DESC0D_HEADER_SIZE, p_additional_copyright_info, i_length);
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}
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}
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static inline bool desc0d_validate(const uint8_t *p_desc)
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{
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return desc_get_length(p_desc) >= DESC0D_HEADER_SIZE - DESC_HEADER_SIZE;
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}
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static inline void desc0d_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_length;
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const uint8_t *p_add_copy_info = desc0d_get_additional_copyright_info(p_desc, &i_length);
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char psz_value[2 * 255 + 1];
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for (i = 0; i < i_length; i++)
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sprintf(psz_value + 2 * i, "%2.2hhx", p_add_copy_info[i]);
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psz_value[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, "<COPYRIGHT_DESC identifier=\"0x%08x\" additional_info_len=\"%u\" additional_info=\"%s\"/>",
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desc0d_get_copyright_identifier(p_desc),
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i_length, psz_value);
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break;
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default:
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pf_print(opaque, " - desc 0d copyright identifier=0x%08x additional_info_len=%u additional_info=%s",
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desc0d_get_copyright_identifier(p_desc),
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i_length, psz_value);
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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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