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151 lines
4.2 KiB
151 lines
4.2 KiB
/*****************************************************************************
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* 291.h: SMPTE 291 Ancillary Data Packet and Space Formatting
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*****************************************************************************
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* Copyright (C) 2016 OpenHeadend
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*
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* Authors: Christophe Massiot <cmassiot@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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/*
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* Normative references:
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* - SMPTE 291
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* - SMPTE RP-291
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*/
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#ifndef __BITSTREAM_SMPTE_291_H__
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#define __BITSTREAM_SMPTE_291_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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/*****************************************************************************
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* SMPTE 291 ancillary data (8-bit mode only)
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*****************************************************************************/
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#define S291_HEADER_SIZE 6
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#define S291_FOOTER_SIZE 1
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#define S291_ADF1 0x00
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#define S291_ADF2 0xff
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#define S291_ADF3 0xff
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/* SMPTE 2016 */
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#define S291_AFD_DID 0x41
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#define S291_AFD_SDID 0x05
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#define S291_PAN_SCAN_DID 0x41
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#define S291_PAN_SCAN_SDID 0x06
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/* SMPTE 2010 */
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#define S291_SCTE104_DID 0x41
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#define S291_SCTE104_SDID 0x07
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/* OP-47 / SMPTE RDD-8 */
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#define S291_OP47SDP_DID 0x43
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#define S291_OP47SDP_SDID 0x02
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#define S291_OP47MP_DID 0x43
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#define S291_OP47MP_SDID 0x03
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/* SMPTE 12M */
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#define S291_ATC_DID 0x60
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#define S291_ATC_SDID 0x60
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/* SMPTE 334 */
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#define S291_CEA708_DID 0x61
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#define S291_CEA708_SDID 0x01
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#define S291_CEA608_DID 0x61
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#define S291_CEA608_SDID 0x02
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/* SMPTE RP-207 */
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#define S291_PROGDESC_DID 0x62
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#define S291_PROGDESC_SDID 0x01
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/* SMPTE 334 */
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#define S291_DATABROADCAST_DID 0x62
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#define S291_DATABROADCAST_SDID 0x02
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/* SMPTE RP-208 (legacy) */
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#define S291_SMPTEVBI_DID 0x62
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#define S291_SMPTEVBI_SDID 0x03
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static inline void s291_set_did(uint8_t *p_s291, uint8_t i_did)
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{
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p_s291[3] = i_did;
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}
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static inline uint8_t s291_get_did(const uint8_t *p_s291)
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{
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return p_s291[3];
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}
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static inline void s291_set_sdid(uint8_t *p_s291, uint8_t i_sdid)
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{
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p_s291[4] = i_sdid;
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}
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static inline uint8_t s291_get_sdid(const uint8_t *p_s291)
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{
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return p_s291[4];
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}
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static inline void s291_set_data_mode(uint8_t *p_s291, uint8_t i_data_mode)
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{
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p_s291[5] &= ~0x60;
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p_s291[5] |= (i_data_mode << 5) & 0x60;
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}
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#define s291_set_dbn s291_set_sdid
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#define s291_get_dbn s291_get_sdid
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static inline void s291_set_dc(uint8_t *p_s291, uint8_t i_dc)
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{
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p_s291[5] = i_dc;
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}
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static inline uint8_t s291_get_dc(const uint8_t *p_s291)
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{
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return p_s291[5];
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}
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static inline uint8_t *s291_get_udw(const uint8_t *p_s291)
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{
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return (uint8_t *)&p_s291[6];
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}
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static inline bool s291_check_crc(const uint8_t *p_s291)
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{
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uint8_t i_crc = 0;
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uint8_t i_dc = s291_get_dc(p_s291);
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int i;
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for (i = 3; i < i_dc + S291_HEADER_SIZE; i++)
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i_crc += p_s291[i];
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return i_crc == p_s291[i];
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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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