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213 lines
5.6 KiB
213 lines
5.6 KiB
/*****************************************************************************
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* 2022_1_fec.h
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*****************************************************************************
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* Copyright (C) 2014 Open Broadcast Systems Ltd
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*
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* Authors: Kieran Kunhya <kierank@obe.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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/*
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* Normative references:
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* - SMPTE 2022-1
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*/
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#ifndef __BITSTREAM_SMPTE_2022_1_FEC_H__
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#define __BITSTREAM_SMPTE_2022_1_FEC_H__
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#include <stdint.h> /* uint8_t, uint16_t, etc... */
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#include <stdbool.h> /* bool */
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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 SMPTE_2022_FEC_HEADER_SIZE 16
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/*
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* Reminder : FEC Header
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0 1 2 3
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| SNBase low bits | Length Recovery |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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|E| PT recovery | Mask |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| TS recovery |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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|N|D|type |index| Offset | NA |SNBase ext bits|
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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static inline void smpte_fec_set_snbase_low(uint8_t *p_fec, uint16_t snbase_low)
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{
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p_fec[0] = snbase_low >> 8;
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p_fec[1] = snbase_low & 0xff;
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}
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static inline uint16_t smpte_fec_get_snbase_low(const uint8_t *p_fec)
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{
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return (p_fec[0] << 8) | p_fec[1];
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}
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static inline void smpte_fec_set_length_rec(uint8_t *p_fec, uint16_t length_rec)
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{
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p_fec[2] = length_rec >> 8;
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p_fec[3] = length_rec & 0xff;
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}
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static inline uint16_t smpte_fec_get_length_rec(const uint8_t *p_fec)
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{
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return (p_fec[2] << 8) | p_fec[3];
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}
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static inline void smpte_fec_set_extension(uint8_t *p_fec)
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{
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p_fec[4] |= 0x80;
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}
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static inline bool smpte_fec_check_extension(const uint8_t *p_fec)
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{
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return !!(p_fec[4] & 0x80);
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}
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static inline void smpte_fec_set_pt_recovery(uint8_t *p_fec, uint8_t pt_recovery)
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{
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p_fec[4] |= pt_recovery & 0x7f;
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}
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static inline uint8_t smpte_fec_get_pt_recovery(const uint8_t *p_fec)
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{
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return p_fec[4] & 0x7f;
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}
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static inline void smpte_fec_set_mask(uint8_t *p_fec, uint32_t mask)
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{
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p_fec[5] = (mask >> 16) & 0xff;
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p_fec[6] = (mask >> 8) & 0xff;
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p_fec[7] = (mask ) & 0xff;
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}
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static inline uint32_t smpte_fec_get_mask(const uint8_t *p_fec)
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{
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return (p_fec[5] << 16) | (p_fec[6] << 8) | p_fec[7];
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}
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static inline void smpte_fec_set_ts_recovery(uint8_t *p_fec, uint32_t snbase)
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{
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p_fec[8] = (snbase >> 24) & 0xff;
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p_fec[9] = (snbase >> 16) & 0xff;
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p_fec[10] = (snbase >> 8) & 0xff;
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p_fec[11] = (snbase >> 0) & 0xff;
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}
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static inline uint32_t smpte_fec_get_ts_recovery(const uint8_t *p_fec)
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{
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return (p_fec[8] << 24) | (p_fec[9] << 16) | (p_fec[10] << 8) | p_fec[11];
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}
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static inline void smpte_fec_clear_n(uint8_t *p_fec)
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{
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p_fec[12] &= ~0x80;
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}
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static inline void smpte_fec_set_n(uint8_t *p_fec)
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{
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p_fec[12] |= 0x80;
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}
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static inline bool smpte_fec_check_n(const uint8_t *p_fec)
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{
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return !!(p_fec[12] & 0x80);
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}
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static inline void smpte_fec_clear_d(uint8_t *p_fec)
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{
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p_fec[12] &= ~0x40;
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}
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static inline void smpte_fec_set_d(uint8_t *p_fec)
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{
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p_fec[12] |= 0x40;
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}
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static inline bool smpte_fec_check_d(const uint8_t *p_fec)
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{
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return !!(p_fec[12] & 0x40);
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}
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static inline void smpte_fec_set_type(uint8_t *p_fec, uint8_t type)
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{
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type &= 0x7;
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p_fec[12] = (p_fec[12] & 0xc7) | (type << 3);
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}
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static inline uint8_t smpte_fec_get_type(uint8_t *p_fec)
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{
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return (p_fec[12] >> 3) & 0x7;
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}
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static inline void smpte_fec_set_index(uint8_t *p_fec, uint8_t index)
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{
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index &= 0x7;
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p_fec[12] = (p_fec[12] & 0xf8) | index;
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}
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static inline uint8_t smpte_fec_get_index(uint8_t *p_fec)
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{
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return p_fec[12] & 0x7;
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}
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static inline void smpte_fec_set_offset(uint8_t *p_fec, uint8_t offset)
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{
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p_fec[13] = offset;
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}
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static inline uint8_t smpte_fec_get_offset(const uint8_t *p_fec)
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{
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return p_fec[13];
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}
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static inline void smpte_fec_set_na(uint8_t *p_fec, uint8_t na)
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{
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p_fec[14] = na;
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}
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static inline uint8_t smpte_fec_get_na(const uint8_t *p_fec)
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{
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return p_fec[14];
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}
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static inline void smpte_fec_set_snbase_ext(uint8_t *p_fec, uint8_t snbase_ext)
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{
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p_fec[15] = snbase_ext;
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}
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static inline uint8_t smpte_fec_get_snbase_ext(const uint8_t *p_fec)
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{
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return p_fec[15];
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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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