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189 lines
5.5 KiB
189 lines
5.5 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
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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 0x0000
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#define S291_ADF2 0x03ff
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#define S291_ADF3 0x03ff
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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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/* SMPTE 299 */
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#define S291_HD_AUDIO_GROUP1_DID 0xe7
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#define S291_HD_AUDIO_GROUP2_DID 0xe6
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#define S291_HD_AUDIO_GROUP3_DID 0xe5
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#define S291_HD_AUDIO_GROUP4_DID 0xe4
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#define S291_HD_AUDIOCONTROL_GROUP1_DID 0xe3
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#define S291_HD_AUDIOCONTROL_GROUP2_DID 0xe2
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#define S291_HD_AUDIOCONTROL_GROUP3_DID 0xe1
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#define S291_HD_AUDIOCONTROL_GROUP4_DID 0xe0
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/* SMPTE 352 */
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#define S291_PAYLOADID_DID 0x41
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#define S291_PAYLOADID_SDID 0x01
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/* SMPTE 272 */
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#define S291_SD_AUDIO_GROUP1_DID 0xff
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#define S291_SD_AUDIO_GROUP2_DID 0xfd
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#define S291_SD_AUDIO_GROUP3_DID 0xfb
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#define S291_SD_AUDIO_GROUP4_DID 0xf9
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#define S291_SD_AUDIOCONTROL_GROUP1_DID 0xef
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#define S291_SD_AUDIOCONTROL_GROUP2_DID 0xee
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#define S291_SD_AUDIOCONTROL_GROUP3_DID 0xed
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#define S291_SD_AUDIOCONTROL_GROUP4_DID 0xec
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static inline uint16_t s291_parity(uint8_t i_val)
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{
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uint8_t i_parity =
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(((i_val * 0x0101010101010101ULL) & 0x8040201008040201ULL) % 0x1FF) & 1;
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return (uint16_t)i_parity << 8 | ((uint16_t)(i_parity ^ 1) << 9);
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}
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static inline void s291_set_did(uint16_t *p_s291, uint8_t i_did)
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{
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p_s291[3] = i_did | s291_parity(i_did);
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}
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static inline uint8_t s291_get_did(const uint16_t *p_s291)
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{
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return p_s291[3] & 0xff;
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}
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static inline void s291_set_sdid(uint16_t *p_s291, uint8_t i_sdid)
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{
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p_s291[4] = i_sdid | s291_parity(i_sdid);
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}
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static inline uint8_t s291_get_sdid(const uint16_t *p_s291)
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{
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return p_s291[4] & 0xff;
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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(uint16_t *p_s291, uint8_t i_dc)
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{
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p_s291[5] = i_dc | s291_parity(i_dc);
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}
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static inline uint8_t s291_get_dc(const uint16_t *p_s291)
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{
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return p_s291[5] & 0xff;
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}
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static inline uint16_t *s291_get_udw(const uint16_t *p_s291)
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{
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return (uint16_t *)&p_s291[6];
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}
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static inline uint16_t s291_compute_cs(const uint16_t *p_s291)
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{
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uint16_t i_cs = 0;
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uint8_t i_dc = s291_get_dc(p_s291);
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unsigned int i;
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for (i = 3; i < i_dc + S291_HEADER_SIZE; i++) {
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i_cs += p_s291[i] & 0x1ff;
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i_cs &= 0x1ff;
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}
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return i_cs | (~i_cs & 0x100) << 1;
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}
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static inline void s291_set_cs(uint16_t *p_s291)
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{
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p_s291[S291_HEADER_SIZE + s291_get_dc(p_s291)] = s291_compute_cs(p_s291);
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}
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static inline bool s291_check_cs(const uint16_t *p_s291)
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{
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return p_s291[S291_HEADER_SIZE + s291_get_dc(p_s291)] ==
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s291_compute_cs(p_s291);
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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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