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174 lines
6.2 KiB
174 lines
6.2 KiB
/*****************************************************************************
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* desc_7b.h: ETSI EN 300 468 Descriptor 0x7b: DTS 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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* - ETSI EN 300 468 V1.12.1 (2011-06) (SI in DVB systems)
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*/
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#ifndef __BITSTREAM_DVB_DESC_7B_H__
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#define __BITSTREAM_DVB_DESC_7B_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 0x7b: DTS descriptor
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*****************************************************************************/
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#define DESC7B_HEADER_SIZE (DESC_HEADER_SIZE + 5)
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static inline void desc7b_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x7b);
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desc_set_length(p_desc, (DESC7B_HEADER_SIZE - DESC_HEADER_SIZE));
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}
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static inline uint8_t desc7b_get_sample_rate_code(const uint8_t *p_desc)
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{
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return ((p_desc[2] & 0xf0) >> 4); // 1111xxxx
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}
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static inline void desc7b_set_sample_rate_code(uint8_t *p_desc, uint8_t i_sample_rate_code)
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{
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p_desc[2] = (p_desc[2] & 0x0f) | (i_sample_rate_code << 4); // 1111xxxx
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}
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static inline uint8_t desc7b_get_bit_rate_code(const uint8_t *p_desc)
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{
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return ((p_desc[2] & 0x0f) << 2) | ((p_desc[3] & 0xc0) >> 6); // xxxx1111 11xxxxxx
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}
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static inline void desc7b_set_bit_rate_code(uint8_t *p_desc, uint8_t i_bit_rate_code)
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{
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p_desc[2] = (p_desc[2] & 0xf0) | ((i_bit_rate_code >> 2) & 0x0f); // xxxx1111
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p_desc[3] = (i_bit_rate_code << 6) | (p_desc[2] & 0x3f); // 11xxxxxx
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}
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static inline uint8_t desc7b_get_nblks(const uint8_t *p_desc)
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{
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return ((p_desc[3] & 0x3f) << 1) | ((p_desc[4] & 0x80) >> 7); // xx111111 1xxxxxxx
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}
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static inline void desc7b_set_nblks(uint8_t *p_desc, uint8_t i_nblks)
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{
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p_desc[3] = (p_desc[3] & 0xc0) | ((i_nblks >> 1) & 0x3f); // xx111111
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p_desc[4] = (i_nblks << 7) | (p_desc[4] & 0x7f); // 1xxxxxxx
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}
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static inline uint16_t desc7b_get_fsize(const uint8_t *p_desc)
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{
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return ((p_desc[4] & 0x7f) << 7) | ((p_desc[5] & 0xfe) >> 1); // x1111111 1111111x
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}
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static inline void desc7b_set_fsize(uint8_t *p_desc, uint16_t i_fsize)
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{
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i_fsize &= 0x3fff;
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p_desc[4] = (p_desc[4] & 0x80) | (i_fsize >> 7); // x1111111
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p_desc[5] = ((i_fsize & 0x7f) << 1) | (p_desc[5] & 0x01); // 1111111x
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}
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static inline uint8_t desc7b_get_surround_mode(const uint8_t *p_desc)
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{
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return ((p_desc[5] & 0x01) << 5) | ((p_desc[6] & 0xf8) >> 3); // xxxxxxx1 11111xxx
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}
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static inline void desc7b_set_surround_mode(uint8_t *p_desc, uint8_t i_surround_mode)
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{
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i_surround_mode &= 0x3f;
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p_desc[5] = (p_desc[5] & 0xfe) | (i_surround_mode >> 5); // xxxxxxx1
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p_desc[6] = ((i_surround_mode & 0x1f) << 3) | (p_desc[6] & 0x07); // 11111xxx
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}
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static inline bool desc7b_get_lfe_flag(const uint8_t *p_desc)
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{
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return (p_desc[6] & 0x04) == 0x04; // xxxxx1xx
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}
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static inline void desc7b_set_lfe_flag(uint8_t *p_desc, bool b_lfe_flag)
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{
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p_desc[6] = b_lfe_flag ? (p_desc[6] | 0x04) : (p_desc[6] &~ 0x04); // xxxxx1xx
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}
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static inline uint8_t desc7b_get_extended_surround_flag(const uint8_t *p_desc)
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{
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return p_desc[6] & 0x03; // xxxxxx11
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}
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static inline void desc7b_set_extended_surround_flag(uint8_t *p_desc, uint8_t i_extended_surround_flag)
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{
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p_desc[6] = (p_desc[6] & 0xfc) | (i_extended_surround_flag & 0x03); // xxxxxx11
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}
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static inline bool desc7b_validate(const uint8_t *p_desc)
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{
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return desc_get_length(p_desc) >= (DESC7B_HEADER_SIZE - DESC_HEADER_SIZE);
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}
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static inline void desc7b_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,
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"<DTS_DESC sample_rate_code=\"%u\" bit_rate_code=\"%u\""
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" nblks=\"%u\" fsize=\"%u\" surround_mode=\"%u\""
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" lfe_flag=\"%u\" extended_surround_flag=\"%u\"/>",
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desc7b_get_sample_rate_code(p_desc),
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desc7b_get_bit_rate_code(p_desc),
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desc7b_get_nblks(p_desc),
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desc7b_get_fsize(p_desc),
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desc7b_get_surround_mode(p_desc),
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desc7b_get_lfe_flag(p_desc),
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desc7b_get_extended_surround_flag(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 7b dts sample_rate_code=%u bit_rate_code=%u"
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" nblks=%u fsize=%u surround_mode=%u"
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" lfe_flag=%u extended_surround_flag=%u",
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desc7b_get_sample_rate_code(p_desc),
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desc7b_get_bit_rate_code(p_desc),
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desc7b_get_nblks(p_desc),
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desc7b_get_fsize(p_desc),
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desc7b_get_surround_mode(p_desc),
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desc7b_get_lfe_flag(p_desc),
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desc7b_get_extended_surround_flag(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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