dsdcc

PR #61 from @srcejon to fix #60

• Do not memset after the end of the array. PR #55 from @dforsi
• Initialize DMR basic privacy key to zero. PR #48 from @argilo
• Implement stale action
• Fix spelling errors. PR #45 from @dforsi

Removes flooding debug message possibly only for DMR.

There was still an issue with the Golay(23,12) syndrome LUT missing a few values. However it does not appear that Golay(23,12) is effectively used.

Fixed syndrome lookup table based decoder errors when bit flips occur in the parity bits. The fix could benefit to DMR, YSF and dPMR modes.

This concerns all modes and allows to be more flexible on the synchronization sequence that will tolerate some mismatching symbols. For now the rule depends on the number of symbols in the sequence and is the following:

• less than 24 symbols: 1 symbol tolerance (NXDN, YSF, dPMR: some)
• greater or equal to 24 symbols: 2 symbols tolerance (DMR, D-Star, dPMR: some, P25: unused, X2-TDMA: unused, Pro-Voice: unused)
  Thus it may be able to capture more frames in adverse conditions but is also exposed to some false positives. This is a compromise and you can also filter the desired mode(s). In general it will achieve better decodes. This is a rather important change hence the middle version upgrade.

• DMR BP: apply XORing only to the first 49 bits of the AMBE frame (data bits). But this does not seem to fix it. DMR BP may be remove in the next revision(s).

• Implemented DMR basic privacy (issue #31)
• Fixed discrepancy between tag and CMakeLists.txt version (issue #29)

In DSDSymbol::pushSample the m_count variable could be zero if some other thread resets it. In case it is zero it means the symbol sequence should be restarted. This should fix a possible program crash that was detected in SDRangel (issue: https://github.com/f4exb/sdrangel/issues/406). In DSDcc this should fix #24

When changing decode mode with DSDDecoder::setDecodeMode the state was not re-initialized properly resulting in the decoder being stuck in the previous mode. In consequence when changing baud rate in SDRangel the decoder could not detect the modes relevant to the new baud rate.

• NXDN: corrected messages display
• Various changes in cmake build for Mac O/S and clang compatibility

Put in place the export logic for compatibility with MSVC compilers.

EFR vocoder implementation for 4800 S/s rate. DV serial support only

Reverted recent cleanup changes that introduced a compilation error when using serial DV. Fixed the unused variables warning by declaring these variables only if serial DV is used.

Run the high pass filter on the 8 kS/s output from AMBE. It makes it easier to have the -3dB corner at 300 Hz exactly. Moreover it can prevent saturation of the interpolation and LP filter stage in case loud bass audio is present.

Added complete support with voice for NXDN. This has been tested mainly with MMDVM and the 65000 reflector but has also been proved working with some local professional service so it should be fine for all standard NXDN networks.

• dsdcc_1.8.0-1_amd64_xenial.deb Debian package for Intel/AMD 64 bit architecture for Ubuntu 16.04
• dsdcc_1.8.0-1_amd64.deb Debian package for Intel/AMD 64 bit architecture for Ubuntu 18.04

Reverted changes made in v1.7.5 as this breaks normal DMR operation.

Allow upsampling by other integer multiples of 8000 S/s than 6. Thus audio sample rates of 16000, 24000, 32000 and 40000 S/s can be supported in addition of the existing 8000 and 48000 S/s

Changed to a Butterworth filter with 240 Hz @ -3 dB.

• dsdcc_1.7.3-1_amd64.deb Debian package for Intel/AMD 64 bit architecture. Works in Ubuntu 16.04
• dsdcc_1.7.3-1_armhf.deb Debian package for ARM (armv7l) architecture. Intended for Debian Jessie distributions

This might improve stability

• dsdcc_1.7.2-1_amd64.deb Debian package for Intel/AMD 64 bit architecture. Works in Ubuntu 16.04
• dsdcc_1.7.2-1_armhf.deb Debian package for ARM (armv7l) architecture. Intended for Debian Jessie distributions