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258 lines
7.4 KiB
258 lines
7.4 KiB
/*****************************************************************************
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* desc_81.h: ATSC A/52 Descriptor 0x81: AC-3 descriptor
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*****************************************************************************
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* Copyright (C) 2019 OpenHeadend
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*
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* Authors: Arnaud de Turckheim <adeturckheim@openheadend.tv>
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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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#ifndef __BITSTREAM_ATSC_DESC_81_H__
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#define __BITSTREAM_ATSC_DESC_81_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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#define DESC81_HEADER_SIZE (DESC_HEADER_SIZE + 3)
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static inline void desc81_init(uint8_t *p_desc)
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{
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desc_set_tag(p_desc, 0x81);
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}
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#define DESC81_SAMPLE_RATE_CODE_48 0x00
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#define DESC81_SAMPLE_RATE_CODE_44_1 0x01
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#define DESC81_SAMPLE_RATE_CODE_32 0x02
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#define DESC81_SAMPLE_RATE_CODE_48_OR_44_1 0x04
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#define DESC81_SAMPLE_RATE_CODE_48_OR_32 0x05
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#define DESC81_SAMPLE_RATE_CODE_44_1_OR_32 0x06
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#define DESC81_SAMPLE_RATE_CODE_48_OR_44_1_OR_32 0x07
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static inline void desc81_set_sample_rate_code(uint8_t *p_desc,
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uint8_t sample_rate)
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{
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p_desc[2] = (p_desc[2] & 0x3f) | (sample_rate << 5);
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}
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static inline uint8_t desc81_get_sample_rate_code(const uint8_t *p_desc)
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{
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return p_desc[2] >> 5;
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}
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static inline void desc81_set_bsid(uint8_t *p_desc, uint8_t bsid)
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{
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p_desc[2] = (p_desc[2] & 0xd0) | (bsid & 0x1f);
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}
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static inline uint8_t desc81_get_bsid(const uint8_t *p_desc)
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{
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return p_desc[2] & 0x1f;
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}
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static inline uint8_t desc81_bit_rate_code_from_octetrate(uint64_t octetrate)
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{
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unsigned table[19] = {
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32, 40, 48, 56, 64, 80,
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96, 112, 128, 160, 192, 224,
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256, 320, 384, 448, 512, 576,
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640,
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};
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for (unsigned i = 0; i < 19; i++) {
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if (octetrate * 8 == table[i] * 1000)
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return i;
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else if (octetrate * 8 < table[i] * 1000)
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return 0x20 | i;
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}
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return 0xff;
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}
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static inline void desc81_set_bit_rate_code(uint8_t *p_desc,
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uint8_t bit_rate_code)
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{
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p_desc[3] = (p_desc[3] & 0x03) | (bit_rate_code << 2);
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}
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static inline uint8_t desc81_get_bit_rate_code(const uint8_t *p_desc)
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{
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return p_desc[3] >> 2;
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}
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static inline void desc81_set_surround_mode(uint8_t *p_desc,
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uint8_t surround_mode)
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{
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p_desc[3] = (p_desc[3] & 0xfc) | (surround_mode & 0x03);
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}
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static inline uint8_t desc81_get_surround_mode(const uint8_t *p_desc)
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{
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return p_desc[3] & 0x03;
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}
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static inline void desc81_set_bsmod(uint8_t *p_desc, uint8_t bsmod)
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{
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p_desc[4] = (p_desc[4] & 0x1f) | (bsmod << 5);
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}
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static inline uint8_t desc81_get_bsmod(const uint8_t *p_desc)
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{
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return p_desc[4] >> 5;
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}
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static inline void desc81_set_num_channels(uint8_t *p_desc,
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uint8_t num_channels)
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{
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p_desc[4] = (p_desc[4] & 0xe1) | ((num_channels & 0x0f) << 1);
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}
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static inline uint8_t desc81_get_num_channels(const uint8_t *p_desc)
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{
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return (p_desc[4] & 0x1e) >> 1;
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}
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static inline void desc81_set_full_svc(uint8_t *p_desc, uint8_t full_svc)
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{
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p_desc[4] = (p_desc[4] & 0xfe) | (full_svc & 0x01);
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}
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static inline uint8_t desc81_get_full_svc(const uint8_t *p_desc)
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{
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return p_desc[4] & 0x1;
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}
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static inline void desc81_set_langcod(uint8_t *p_desc, uint8_t langcod)
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{
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p_desc[5] = langcod;
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}
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static inline uint8_t desc81_get_langcod(const uint8_t *p_desc)
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{
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return p_desc[5];
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}
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static inline void desc81_set_langcod2(uint8_t *p_desc, uint8_t langcod2)
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{
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if (desc81_get_num_channels(p_desc) == 0)
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p_desc[6] = langcod2;
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}
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static inline uint8_t desc81_get_langcod2(const uint8_t *p_desc)
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{
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return p_desc[6];
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}
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static inline void desc81_set_mainid(uint8_t *p_desc, uint8_t mainid)
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{
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if (desc81_get_bsmod(p_desc) < 2)
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p_desc[7] = (p_desc[7] & 0x1f) | (mainid << 5);
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}
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static inline uint8_t desc81_get_mainid(const uint8_t *p_desc)
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{
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return p_desc[7] >> 5;
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}
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static inline void desc81_set_priority(uint8_t *p_desc, uint8_t priority)
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{
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p_desc[7] = (p_desc[7] & 0xe7) | ((priority & 0x3) << 3);
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}
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static inline uint8_t desc81_get_priority(const uint8_t *p_desc)
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{
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return (p_desc[7] & 0x18) >> 3;
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}
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static inline void desc81_set_asvcflags(uint8_t *p_desc, uint8_t asvcflags)
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{
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p_desc[7] = asvcflags;
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}
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static inline uint8_t desc81_get_asvcflags(const uint8_t *p_desc)
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{
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return p_desc[7];
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}
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static inline bool desc81_validate(const uint8_t *p_desc)
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{
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uint8_t i_size = (DESC81_HEADER_SIZE - DESC_HEADER_SIZE);
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return desc_get_length(p_desc) >= i_size;
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}
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static inline void desc81_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 sample_rate_code = desc81_get_sample_rate_code(p_desc);
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uint8_t bsid = desc81_get_bsid(p_desc);
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uint8_t bit_rate_code = desc81_get_bit_rate_code(p_desc);
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uint8_t surround_mode = desc81_get_surround_mode(p_desc);
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uint8_t bsmod = desc81_get_bsmod(p_desc);
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uint8_t num_channels = desc81_get_num_channels(p_desc);
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uint8_t full_svc = desc81_get_full_svc(p_desc);
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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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"<AC3_DESC"
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" sample_rate=\"0x%02x\""
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" bsid=\"0x%02x\""
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" bit_rate=\"0x%02x\""
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" surround_mode=\"0x%02x\""
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" bsmod=\"0x%02x\""
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" num_channels=\"0x%02x\""
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" full_svc=\"%u\"/>",
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sample_rate_code,
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bsid,
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bit_rate_code,
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surround_mode,
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bsmod,
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num_channels,
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full_svc);
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break;
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default:
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pf_print(opaque,
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" - desc 81 ac-3"
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" sample_rate=\"0x%02x\""
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" bsid=\"0x%02x\""
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" bit_rate=\"0x%02x\""
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" surround_mode=\"0x%02x\""
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" bsmod=\"0x%02x\""
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" num_channels=\"0x%02x\""
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" full_svc=\"%u\"",
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sample_rate_code,
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bsid,
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bit_rate_code,
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surround_mode,
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bsmod,
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num_channels,
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full_svc);
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break;
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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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