8874d1262b
This commit adds a maybeFixupVoiceFrame() function that is used by both the RF and Net code to manage FEC regeneration and DTMF blanking in voice frames. The presence of Fast Data is discovered by reading the mini-header in every second data frame. If found, FEC regeneration and DTMF blanking are disabled for the current and next voice frames. An exception is voice frames that have a sync frame instead of a data frame. This commit always disables FEC regeneration and DTMF blanking for these frames. A later commit will add support for these frames by setting aside the voice frame until the next data frame can be read. This commit also includes a number of debugging statements that will be removed in a later commit.
94 lines
3.8 KiB
C
94 lines
3.8 KiB
C
/*
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* Copyright (C) 2015,2016,2018,2019 by Jonathan Naylor G4KLX
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#if !defined(DStarDefines_H)
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#define DStarDefines_H
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#include "Defines.h"
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const unsigned int DSTAR_HEADER_LENGTH_BYTES = 41U;
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const unsigned int DSTAR_FRAME_LENGTH_BYTES = 12U;
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const unsigned char DSTAR_END_PATTERN_BYTES[] = { TAG_EOT, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0x55, 0xC8, 0x7A };
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const unsigned int DSTAR_END_PATTERN_LENGTH_BYTES = 6U;
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const unsigned char DSTAR_NULL_AMBE_DATA_BYTES[] = { 0x9E, 0x8D, 0x32, 0x88, 0x26, 0x1A, 0x3F, 0x61, 0xE8 };
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const unsigned char DSTAR_NULL_SLOW_SYNC_BYTES[] = { 0x55, 0x2D, 0x16 };
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// Note that these are already scrambled, 0x66 0x66 0x66 otherwise
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const unsigned char DSTAR_NULL_SLOW_DATA_BYTES[] = { 0x16, 0x29, 0xF5 };
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const unsigned char DSTAR_NULL_FRAME_SYNC_BYTES[] = { TAG_DATA, 0x9E, 0x8D, 0x32, 0x88, 0x26, 0x1A, 0x3F, 0x61, 0xE8, 0x55, 0x2D, 0x16 };
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const unsigned char DSTAR_NULL_FRAME_DATA_BYTES[] = { TAG_DATA, 0x9E, 0x8D, 0x32, 0x88, 0x26, 0x1A, 0x3F, 0x61, 0xE8, 0x16, 0x29, 0xF5 };
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const unsigned int DSTAR_VOICE_FRAME_LENGTH_BYTES = 9U;
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const unsigned int DSTAR_DATA_FRAME_LENGTH_BYTES = 3U;
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const unsigned int DSTAR_LONG_CALLSIGN_LENGTH = 8U;
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const unsigned int DSTAR_SHORT_CALLSIGN_LENGTH = 4U;
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const unsigned char DSTAR_SLOW_DATA_TYPE_MASK = 0xF0U;
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const unsigned char DSTAR_SLOW_DATA_TYPE_GPSDATA = 0x30U;
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const unsigned char DSTAR_SLOW_DATA_TYPE_TEXT = 0x40U;
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const unsigned char DSTAR_SLOW_DATA_TYPE_HEADER = 0x50U;
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const unsigned char DSTAR_SLOW_DATA_TYPE_FASTDATA01 = 0x80U;
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const unsigned char DSTAR_SLOW_DATA_TYPE_FASTDATA16 = 0x90U;
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const unsigned char DSTAR_SLOW_DATA_TYPE_SQUELCH = 0xC0U;
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const unsigned char DSTAR_SLOW_DATA_LENGTH_MASK = 0x0FU;
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// Data Frames are always scrambled using the first three bytes of
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// DSTAR_SCRAMBLER_BYTES, and Voice Frames are scrambled with all nine
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// bytes when Fast Data is in use
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const unsigned char DSTAR_SCRAMBLER_BYTES[] = { 0x70U, 0x4FU, 0x93U, 0x40U, 0x64U, 0x74U, 0x6DU, 0x30U, 0x2BU };
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const unsigned char DSTAR_DATA_MASK = 0x80U;
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const unsigned char DSTAR_REPEATER_MASK = 0x40U;
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const unsigned char DSTAR_INTERRUPTED_MASK = 0x20U;
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const unsigned char DSTAR_CONTROL_SIGNAL_MASK = 0x10U;
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const unsigned char DSTAR_URGENT_MASK = 0x08U;
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const unsigned char DSTAR_REPEATER_CONTROL = 0x07U;
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const unsigned char DSTAR_AUTO_REPLY = 0x06U;
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const unsigned char DSTAR_RESEND_REQUESTED = 0x04U;
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const unsigned char DSTAR_ACK_FLAG = 0x03U;
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const unsigned char DSTAR_NO_RESPONSE = 0x02U;
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const unsigned char DSTAR_RELAY_UNAVAILABLE = 0x01U;
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const unsigned char DSTAR_SYNC_BYTES[] = {0x55U, 0x2DU, 0x16U};
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const unsigned char DSTAR_DTMF_MASK[] = { 0x82U, 0x08U, 0x20U, 0x82U, 0x00U, 0x00U, 0x82U, 0x00U, 0x00U };
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const unsigned char DSTAR_DTMF_SIG[] = { 0x82U, 0x08U, 0x20U, 0x82U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U };
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const unsigned int DSTAR_FRAME_TIME = 20U;
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enum LINK_STATUS {
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LS_NONE,
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LS_PENDING_IRCDDB,
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LS_LINKING_LOOPBACK,
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LS_LINKING_DEXTRA,
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LS_LINKING_DPLUS,
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LS_LINKING_DCS,
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LS_LINKING_CCS,
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LS_LINKED_LOOPBACK,
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LS_LINKED_DEXTRA,
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LS_LINKED_DPLUS,
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LS_LINKED_DCS,
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LS_LINKED_CCS
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};
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#endif
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