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Add new processing for D-Star Fast Data which doesn't clobber normal

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D-Star audio.
This commit is contained in:
Jonathan Naylor
2025-03-12 12:55:25 +00:00
parent 351c1199fb
commit 78fc96b0a5
12 changed files with 259 additions and 113 deletions
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65
DStarSlowData.cpp
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@@ -1,5 +1,5 @@
/*
* Copyright (C) 2016,2023 by Jonathan Naylor G4KLX
* Copyright (C) 2016,2023,2025 by Jonathan Naylor G4KLX
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -33,7 +33,8 @@ m_buffer(NULL),
m_text(NULL),
m_textPtr(0U),
m_textBits(0x00U),
m_state(SDD_FIRST)
m_type(0x00U),
m_complete(false)
{
m_header = new unsigned char[50U]; // DSTAR_HEADER_LENGTH_BYTES
m_buffer = new unsigned char[DSTAR_DATA_FRAME_LENGTH_BYTES * 2U];
@@ -47,24 +48,33 @@ CDStarSlowData::~CDStarSlowData()
delete[] m_text;
}
CDStarHeader* CDStarSlowData::addHeader(const unsigned char* data)
void CDStarSlowData::peakSlowData(const unsigned char* data, unsigned int n)
{
assert(data != NULL);
switch (m_state) {
case SDD_FIRST:
if ((n % 2U) == 0U) {
m_type = data[9U] ^ DSTAR_SCRAMBLER_BYTES[0U];
m_complete = false;
} else {
m_complete = true;
}
}
CDStarHeader* CDStarSlowData::addHeader(const unsigned char* data, unsigned int n)
{
assert(data != NULL);
if ((n % 2U) == 0U) {
m_type = data[9U] ^ DSTAR_SCRAMBLER_BYTES[0U];
m_buffer[0U] = data[9U] ^ DSTAR_SCRAMBLER_BYTES[0U];
m_buffer[1U] = data[10U] ^ DSTAR_SCRAMBLER_BYTES[1U];
m_buffer[2U] = data[11U] ^ DSTAR_SCRAMBLER_BYTES[2U];
m_state = SDD_SECOND;
return NULL;
case SDD_SECOND:
m_complete = false;
} else {
m_buffer[3U] = data[9U] ^ DSTAR_SCRAMBLER_BYTES[0U];
m_buffer[4U] = data[10U] ^ DSTAR_SCRAMBLER_BYTES[1U];
m_buffer[5U] = data[11U] ^ DSTAR_SCRAMBLER_BYTES[2U];
m_state = SDD_FIRST;
break;
m_complete = true;
}
if ((m_buffer[0U] & DSTAR_SLOW_DATA_TYPE_MASK) != DSTAR_SLOW_DATA_TYPE_HEADER)
@@ -95,24 +105,21 @@ CDStarHeader* CDStarSlowData::addHeader(const unsigned char* data)
return new CDStarHeader(m_header);
}
const unsigned char* CDStarSlowData::addText(const unsigned char* data)
const unsigned char* CDStarSlowData::addText(const unsigned char* data, unsigned int n)
{
assert(data != NULL);
switch (m_state) {
case SDD_FIRST:
if ((n % 2U) == 0U) {
m_type = data[9U] ^ DSTAR_SCRAMBLER_BYTES[0U];
m_buffer[0U] = data[9U] ^ DSTAR_SCRAMBLER_BYTES[0U];
m_buffer[1U] = data[10U] ^ DSTAR_SCRAMBLER_BYTES[1U];
m_buffer[2U] = data[11U] ^ DSTAR_SCRAMBLER_BYTES[2U];
m_state = SDD_SECOND;
return NULL;
case SDD_SECOND:
m_complete = false;
} else {
m_buffer[3U] = data[9U] ^ DSTAR_SCRAMBLER_BYTES[0U];
m_buffer[4U] = data[10U] ^ DSTAR_SCRAMBLER_BYTES[1U];
m_buffer[5U] = data[11U] ^ DSTAR_SCRAMBLER_BYTES[2U];
m_state = SDD_FIRST;
break;
m_complete = true;
}
switch (m_buffer[0U]) {
@@ -160,7 +167,7 @@ const unsigned char* CDStarSlowData::addText(const unsigned char* data)
if (m_textBits != 0x0FU)
return NULL;
CUtils::dump(1U, "D-STar slow data text", m_text, 20U);
CUtils::dump(1U, "D-Star slow data text", m_text, 20U);
m_textBits = 0x00U;
@@ -172,14 +179,16 @@ void CDStarSlowData::start()
::memset(m_header, 0x00U, DSTAR_HEADER_LENGTH_BYTES);
m_ptr = 0U;
m_state = SDD_FIRST;
m_type = 0x00U;
m_complete = false;
m_textBits = 0x00U;
}
void CDStarSlowData::reset()
{
m_ptr = 0U;
m_state = SDD_FIRST;
m_type = 0x00U;
m_complete = false;
m_textBits = 0x00U;
}
@@ -233,3 +242,13 @@ void CDStarSlowData::getSlowData(unsigned char* data)
data[2U] = 'f' ^ DSTAR_SCRAMBLER_BYTES[2U];
}
}
unsigned char CDStarSlowData::getType() const
{
return m_type & DSTAR_SLOW_DATA_TYPE_MASK;
}
bool CDStarSlowData::isComplete() const
{
return m_complete;
}